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WO2012022261A1 - Moule de coulée pour un bloc moteur diesel monocylindre, bloc moteur multicylindres divisé horizontalement, moule de coulée extérieur, et procédé associé de coulée à faible teneur en carbone économisant l'énergie - Google Patents

Moule de coulée pour un bloc moteur diesel monocylindre, bloc moteur multicylindres divisé horizontalement, moule de coulée extérieur, et procédé associé de coulée à faible teneur en carbone économisant l'énergie Download PDF

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Publication number
WO2012022261A1
WO2012022261A1 PCT/CN2011/078519 CN2011078519W WO2012022261A1 WO 2012022261 A1 WO2012022261 A1 WO 2012022261A1 CN 2011078519 W CN2011078519 W CN 2011078519W WO 2012022261 A1 WO2012022261 A1 WO 2012022261A1
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Prior art keywords
mold
hole
core
gate
casting
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Ceased
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PCT/CN2011/078519
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English (en)
Chinese (zh)
Inventor
韩士政
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/08—Clamping equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores

Definitions

  • the invention belongs to the field of casting technology, in particular to a casting process of a single cylinder series diesel engine body, and also relates to a single cylinder diesel engine body casting mold. It also relates to a horizontally-formed outer mold for castings and a method of manufacturing the same, and more particularly to a cast outer mold for a multi-cylinder body for horizontal splitting and a method of manufacturing the same.
  • the mold used in the casting process of the single cylinder diesel engine body includes an outer mold and an inner core, wherein the outer mold includes an upper mold and a lower mold, and the inner core includes an upper core and a lower core.
  • the outer mold is usually made of a mixture of sand, bentonite, coal powder and sand powder.
  • the above mixture is placed in a sand mixer having a crushing and pulverizing function for mixing.
  • an appropriate amount of water is added, and then the ground mixed material is filled into the sand box (as shown in FIG. 1), and the upper and lower molds of the outer mold are molded by vibration or pressure by a hand or a molding machine.
  • a transverse runner iron bar 08 and a vertical gate iron block 08a are formed which are substantially equal in length to the side of the body.
  • the outer mold material and the sand box under pressure vibration forming have a low strength and water content, resulting in the existence of pores and blisters in the cast casting, and the qualified rate of the finished product is low.
  • the fixed mold structure of the outer mold sand box lock has low positioning precision between the upper and lower molds, and the core gap between the outer mold and the core core of the inner core is large, which makes the two sand boxes of the upper and lower molds easy. Misplacement, these problems will lead to an increase in the number of burrs of the casting, the appearance is rough and unattractive, and the machining allowance in the subsequent machining of the machine is increased, the cutting tool wear consumption is high, and the amount of iron cuttings is large. As a result, the efficiency of machining is reduced, and the amount of iron returned to the furnace is increased, and the effective utilization of molten iron is reduced.
  • the existing process steps are numerous and the process is complicated.
  • the materials of the outer mold are ground and mixed and filled into the sand box for vibration and extrusion molding.
  • the equipment and facilities are numerous, the operators are many, the labor intensity is high, and the production efficiency is low.
  • the gate design of the mold makes the transition runner too long, the thermal conductivity of the molten iron is deteriorated, and the cold separation phenomenon is easy to occur, and the crack is formed on the casting to cause the casting to be scrapped.
  • the over-long transition runner also forms a transverse runner iron bar of approximately 9 kg in weight on the casting. This increases the labor for removing the iron rods for the post-processing of the castings.
  • This long transitional runner iron rod, together with the burrs of the castings caused by the easy-to-displacement of the upper and lower flasks and the low precision, is added back to the furnace.
  • the amount of iron can reach 15-20%, which increases the energy consumption of melting back to the furnace and The pollution damage to the environment reduces the effective utilization of molten iron.
  • a mold for casting a body of a diesel engine wherein the upper and lower cores of the inner core are made of a resin sand material mixed with sand and a resin.
  • the sand type of this material only needs to be mixed with sand and resin with a sand mixer with only a stirring function, and then formed by a cold core machine and solidified with "triethylamine".
  • the model produced by the process has high strength, high precision, good quality and simple process.
  • the existing single-cylinder diesel engine body which has a very low added value, does not use the manufacturing process and materials of the above-mentioned inner core in the production of its outer mold.
  • the outer mold has such characteristics: It is horizontally divided into two parts: the upper case and the lower case, such as: automobile engine body, cylinder head, gearbox, flywheel case, motor case, reducer case, etc.
  • the above problems also exist in casting in technology.
  • the object of the present invention is to improve the defects of the prior art, and provide a single-cylinder diesel engine body energy-saving low-carbon casting process capable of improving the quality of the casting, reducing the casting cost, and improving the production efficiency;
  • Another object of the present invention is to provide a single cylinder diesel engine body casting mold
  • Still another object of the present invention is to provide a method for producing a cast outer mold for a horizontally divided casting; and a further object of the present invention is to provide a cast outer mold for a horizontally divided casting.
  • a still further object of the present invention is to provide a method of manufacturing an outer mold for a multi-cylinder machine as a horizontal type and a cast outer mold to be applied.
  • the invention relates to a process for energy-saving low-carbon casting of a single-cylinder diesel engine, comprising the steps of: manufacturing an outer mold, making an inner core, clamping, casting and cooling, and the outer mold and the inner core are combined to form a shape corresponding to the shape of the single-cylinder diesel engine body. Connected body pouring space runners, where:
  • the raw material for the outer mold is the same as the raw material for the inner mold made in the prior art, including sand and resin, and further includes a curing agent "triethylamine";
  • Method of making the outer mold First, the sand and the resin are mixed, and then the mixture is placed in an upper mold and a lower mold sand mold in the outer mold to be press-formed at room temperature, and then triethylamine is sprayed thereto. Curing, forming the upper and lower molds;
  • a casting hole is disposed on the mold corresponding to the intermediate spindle hole of the single cylinder diesel engine body, and a transition runner is disposed in the mold, the transition gate is connected to the pouring hole and the pouring of the single cylinder diesel engine body is formed Space, the pouring hole and the transition runner form the runner;
  • the lower core is placed in the lower mold, the upper core is fastened to the lower core, the upper mold is fastened to the lower mold, and the upper and lower molds are matched by a stop provided therebetween Positioning and clamping the lock by a locking clamp disposed outside the mold;
  • a casting is obtained in the cooling demolding step.
  • the upper core and the lower core may also be positioned by a joint provided therebetween.
  • press molding at normal temperature is carried out in a cold press.
  • the materials and manufacturing methods of the upper core and the lower core of the inner core are substantially the same as those of the prior art, namely:
  • the transition runner may be specifically configured to: the upper mold of the outer mold is disposed at a position corresponding to an intermediate spindle hole of the single cylinder diesel engine body a gate through hole, and a transition runner is arranged in the inner hole of the through hole to communicate with a pouring space of the body on the inner side of the upper mold; on the lower mold of the outer mold, the gate through hole of the upper mold On the inner surface of the lower mold of the aligned position, there is a converging dimple, and a transition runner is opened outwardly on the outer side wall of the dimple to communicate with the casting space on the inner side of the lower mold; on the inner core a through hole is formed in a position on the core opposite to the gate
  • the exhaust port may be disposed such that: an exhaust through hole is provided at a corresponding position of at least one balance hole of the mold, or Providing an exhaust through hole on a corresponding position of the camshaft hole of the single cylinder diesel engine body on the mold, or
  • An exhaust through hole is provided in a position on the mold corresponding to the main shaft hole of the single cylinder diesel engine body provided with the gate through hole.
  • the exhaust passage may specifically be such that:
  • the upper core Providing a protrusion on a corresponding outer surface of the exhaust passage of the exhaust gas communication hole and/or the exhaust gas passage of the upper mold such that an upper end opening of the exhaust communication hole of the upper core and the upper mold A sealing structure is formed between the lower end orifices of the exhaust through holes.
  • the exhaust through hole on the upper mold and the exhaust communication hole on the upper core constitute an exhaust passage that communicates with the outside of the space between the upper and lower cores of the inner core.
  • the cooling may be natural cooling or forced air cooling.
  • the resin may be a phenolic resin or a polyisocyanate.
  • the weight ratio of the resin to the sand is 1.0-2.0%, and the amount of the triethylamine curing agent sprayed is 0.10-0.20% of the weight of the sand. .
  • the proportion of the phenolic resin added to the sand is preferably 1.5%, and the preferred amount of the upper and lower molds sprayed with triethylamine is 0.18% by weight of the sand.
  • the mold provided by the present invention includes an outer mold, an inner core and a locking clamp, the outer mold includes an upper mold and a lower mold, the inner core includes an upper core and a lower core, and the upper mold is fastened to the In the lower mold, in a space formed between the upper and lower molds, the lower core is placed in the lower mold, the upper core is fastened on the upper core; and the outer mold and the inner core have The combination of the two constitutes the structure of the body pouring space corresponding to the shape of the single cylinder diesel engine body, and also constitutes such a gate, a transition passage and an exhaust port:
  • a casting hole is disposed on the mold corresponding to the intermediate spindle hole of the single cylinder diesel engine body, and a transition runner is disposed in the mold, which communicates with the pouring hole and the pouring space, the pouring hole and the transition a runner is formed on the mold; and an exhaust port is disposed on the mold corresponding to a position of the opening of the single cylinder diesel engine body other than the spindle hole or a position adjacent to the relative position of each opening; Providing an exhaust passage connected to the exhaust port;
  • the locking clamp allows the upper and lower dies to be secured together.
  • the transition runner can in particular be arranged in such a way that:
  • a gate through hole is disposed at a position corresponding to the intermediate spindle hole of the single cylinder diesel engine body of the upper mold, and a transition runner and an inner side surface of the upper mold are disposed on the inner gate through hole of the upper mold
  • the pouring space is connected to the upper;
  • a converging dimple is disposed on the inner surface of the lower mold at a position on the lower mold of the outer mold that is aligned with the gate through hole on the upper mold, and is outside the pit a transitional sprue is formed on the wall. Communicating with the pouring space on the inner side of the lower mold;
  • a through hole is formed in the upper core of the inner core at a position aligned with the gate through hole formed in the upper mold of the outer mold, and the downward opening of the through hole Set the mouth structure;
  • a through hole is formed in the lower core of the inner core at a position aligned with the through hole formed in the upper core, and the upward opening of the through hole is provided with a stop structure,
  • the stop structure on the through hole on the core constitutes a sealing structure.
  • the vertical transition runner between the upper mold and the upper core and between the lower mold and the lower core is brought into communication with the body pouring space.
  • the sealing structure is preferably:
  • a lower end surface of the gate through hole on the upper mold is attached to an upper end surface of the through hole corresponding to the upper core; an upper end surface of the recess on the lower mold is The lower end faces of the corresponding through holes on the lower core are attached.
  • the exhaust port may be disposed at a corresponding position on the mold at a corresponding position of the at least one balance hole of the single cylinder diesel engine body; or correspondingly disposed on the mold corresponding to the camshaft hole of the single cylinder diesel engine body Positioning an exhaust through hole; or disposed on the mold corresponding to the spindle hole of the single cylinder diesel engine body is provided with a through hole at a position adjacent to the gate through hole;
  • the exhaust passage can be arranged like this:
  • a clamp structure may also be provided in the mold assembly
  • the outer mold and/or the inner core are made of resin sand composed of a combination of sand and resin, and a triethylamine curing agent is provided thereon to mold the outer mold and the inner core.
  • the resin may be a phenolic resin or a polyisocyanate.
  • the weight ratio of the resin to the sand is 1.0 - 2.0%, and the amount of the triethylamine curing agent sprayed is 0.10 - 0.20% by weight of the sand.
  • the proportion of the resin added to the sand is preferably 1.5%, and the preferred amount of the upper and lower molds sprayed with triethylamine is 0.18% by weight of the sand.
  • a locking clamp is provided between the upper and lower dies constituting the outer mold.
  • the locking clamp device may be a lower pad, an upper pressing plate and a fastener.
  • the lower pad is placed under the lower die, and the upper pressing plate is placed on the upper die, and a fastener is arranged on the side of the die, and the clamping is fixed on the lower pad.
  • the plate and the upper platen are such that the mold is clamped.
  • the fastener may be a C-shaped hook, and the upper and lower ends of the hook are clamped on the lower bottom surface of the lower pad and the upper plate upper surface.
  • the upper pressing plate is provided with a hole corresponding to the gate through hole and the exhaust through hole on the upper mold, so that the gate through hole and the exhaust through hole are exposed.
  • the lower pad and the upper plate are preferably iron plates.
  • the present invention provides a method for manufacturing a cast outer mold for a horizontally divided casting, wherein the outer mold is a horizontal split structure, including an upper mold and a lower mold; wherein:
  • the raw material for the outer mold including sand and resin, and further includes a curing agent "triethylamine”;
  • a method for producing the outer mold first, the sand and the resin are mixed, and then the mixture is put into production. In the upper mold and the lower mold sand mold in the outer mold, pressure molding is carried out at normal temperature, and then "triethylamine” is sprayed and solidified to form the upper mold and the lower mold;
  • the gate through hole is provided on an upper surface of the upper mold, and the exhaust port is also disposed on an upper surface of the upper mold.
  • the upper and lower dies are cooperatively positioned by a stop provided therebetween and are clamped by a locking clamp disposed outside the outer mold.
  • a transition runner is disposed between the gate through hole and the pouring space in the outer mold, and the transition gate is arranged as follows:
  • the gate through hole is disposed on an upper surface of the upper mold of the outer mold, and the transition gate is disposed at an inner side opening of the through hole to communicate with a pouring space of a body on an inner side of the upper mold ;
  • a horizontally-type casting casting mold for outer casting comprising an outer mold, the outer mold is a horizontal parting structure, comprising an upper mold and a lower mold, the upper mold is fastened to the lower mold, and the upper and lower molds are a space formed therebetween; a gate through hole and an exhaust port are provided on the upper mold:
  • the gate through hole is provided on an upper surface of the upper mold, and the exhaust port is also disposed on an upper surface of the upper mold.
  • the upper and lower molds are cooperatively positioned by a stop provided therebetween, and are clamped and locked by a locking clamp disposed outside the outer mold, the locking clamp fixing the upper and lower molds at together.
  • the gate through hole is disposed on an upper surface of the upper mold of the outer mold, and a transition runner is disposed at an inner side opening of the through hole to communicate with a pouring space on an inner side surface of the upper mold;
  • a collecting pit is provided, and in the pit A transition runner is formed on the outer side wall to communicate with the pouring space on the inner side of the lower mold.
  • a matching anchor is provided on the peripheral edge of the horizontal part of the casting upper die and the lower die contact.
  • the locking clamping device comprises a lower pad, an upper pressing plate and a fastener, wherein the lower pad is Under the lower mold, the upper pressing plate is placed on the upper mold, and a fastener is arranged on the side of the mold, the two ends of which are fastened on the upper pressing plate and the lower backing plate; the upper pressing plate is corresponding to the pouring on the upper mold Holes are formed in the through hole and the exhaust through hole to expose the gate through hole and the exhaust through hole.
  • the horizontally-typed casting is a multi-cylinder body.
  • the outer mold and/or the inner core are made of resin sand composed of a combination of sand and resin, and a triethylamine curing agent is provided thereon to mold the outer mold and the inner core.
  • the single-cylinder diesel engine body energy-saving, low-carbon casting process and the mold provided by the invention have the following advantages:
  • the strength of the outer mold is improved, because the water is not contained in the material, the problem of pores and blisters caused by the gas generated during the mold casting of the mold is reduced, the yield of the finished product is improved, and the finished product is reduced.
  • the phenomenon of oil leakage and water leakage after the diesel engine body is made.
  • the upper and lower molds are not easily misaligned by the positioning of the nozzles, and the upper and lower molds are not easily misaligned, which greatly reduces the burr, and the machining allowance is greatly reduced due to the improved precision (original blank processing)
  • the remaining amount is 3-4 mm, and the machining allowance of the invention is 1.5-2 mm)
  • the tool consumption is also reduced, the iron content of the iron filings is also reduced, and the utilization rate of molten iron is increased.
  • the gate of the mold changes from the side of the machine body to the position corresponding to the spindle hole in the middle of the machine body, which makes the transition runner greatly shortened, the molten iron of the mold has good heat conduction, reduces the cold separation phenomenon, improves the yield of the finished product, and more importantly, passes Changing the gate runner makes the lateral runner iron bar formed in the existing casting no longer formed, thereby greatly reducing the amount of iron returned to the furnace. With this and the previous advantage, the utilization rate of molten iron can be increased by 20%. It saves the energy consumed by melting back to the furnace iron and reduces the emission of exhaust gas, reflecting the low carbon and environmentally friendly process characteristics.
  • the present invention provides a new structure by changing the sprue structure, which greatly shortens the transition runner, the outer mold is made of resin sand, which is not easy to be misaligned, reduces the machining allowance, reduces the amount of iron returned, and other related improvements.
  • the mold and the new casting process not only did not increase the production cost, but also greatly reduced the cost, improved the economic efficiency, and enabled the product and casting process made of resin sand to be promoted, and the new process and the new mold were in line with the state-to-business
  • the energy-saving and low-carbon requirements have significantly improved the technological advancement and economic benefits of the cast single-cylinder diesel engine body. It is a revolution in the traditional old casting process and mold.
  • the horizontally-divided multi-cylinder body and the casting outer mold for castings and the manufacturing method thereof have the above advantages, and the strength of the outer mold produced by changing the outer mold core material is improved, because the water in the material is reduced, and the amount is reduced. Due to the problems of pores, blisters and shrinkage cavities generated during the outer mold water casting, the yield of the finished product is improved, and the oil leakage and water leakage of the finished product are reduced, and the tensile strength of the cast product is greatly improved. There is no need to set up a sand box for the outer mold, and there is no need for a molding machine and a sand mixer in the manufacturing process.
  • the precision of the outer mold sand core with improved strength is greatly improved, and the core gap is greatly reduced; the utility model has the advantages that the upper and lower molds are not easily misaligned by the positioning of the mouth and the external clamping and locking device, which greatly reduces the burr. Due to the improved precision, the subsequent machining allowance is greatly reduced; the production of new external mold casting process, equipment and facilities are greatly reduced, the use of molding machines, sand mixers and sand boxes is abolished, the labor intensity of workers is greatly reduced, and the output is increased. The cost is saved, the profit is increased, and the production environment is improved. The new process reduces the production cost and investment by about one-tenth of the investment in large foundry equipment. The casting modeling technology is difficult to change because of the process.
  • the above is guaranteed, and the skilled workers can operate, which makes the complicated modeling technology simple.
  • the labor intensity of the workers is greatly reduced, the output is greatly improved, and the new technology can double the output when the original number of workers remains unchanged.
  • the required material cost is significantly reduced, the profit is increased, and the profit per ton of castings can be increased by about 1,000 yuan.
  • the product quality is obviously improved, which is mainly reflected in the appearance of the cast castings, the smoothness is improved, and the tensile strength is improved compared with the original process. More than 10%. With this process, it can receive the effects of energy saving, low carbon, low input and high output. It is a challenge and revolution to the traditional crafts of the foundry industry, and it is the "cutout" of the foundry industry.
  • FIG. 1 is a schematic view of a sand box used in a casting process of a conventional single cylinder diesel engine
  • FIG. 2 is a schematic view showing a casting of a conventional single cylinder diesel engine body casting process
  • Fig. 3 is a schematic view showing a lateral transition gate iron bar and a corresponding gate iron block for casting a casting in a conventional single cylinder diesel engine body casting process;
  • FIG. 4 is a schematic view showing the appearance of a mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 5a is a schematic view showing the structure of a mold upper mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 5b is a schematic structural view of a lower mold of a mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 5a is a schematic view showing the structure of a mold upper mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 5b is a schematic structural view of a lower mold of a mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 5a is a schematic view showing the structure of a mold upper mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 5b is a schematic structural view of a lower mold of a mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 5b is a schematic structural view of
  • FIG. 6 is a schematic view showing the combination of a lower mold and an inner core of a mold outer mold used in a casting process of a single cylinder diesel engine body according to the present invention
  • FIG. 7 is a schematic cross-sectional structural view of a mold used in a casting process of a single cylinder diesel engine body according to the present invention.
  • FIG. 8 is a schematic structural view of a mold casting body used in a casting process of a single cylinder diesel engine body according to the present invention.
  • FIG. 9 is a schematic structural view of an outer mold used in casting a multi-cylinder automobile engine body according to the present invention
  • FIG. 10 is a partially exploded structural view of FIG. 9;
  • Figure 11 is a schematic exploded view of the outer mold of Figure 9;
  • Figure 12 is a top plan view showing the lower mold of the outer mold shown in Figure 9;
  • Figure 13 is a schematic structural view of the upper mold in the outer mold shown in Figure 9;
  • Fig. 14 is a view showing the results of the casting of the multi-cylinder automobile engine body cast by the outer mold shown in Figs. 9 to 13 in combination with the corresponding inner core.
  • the energy saving low carbon casting process of the single cylinder diesel engine body comprises the following steps:
  • the outer mold includes an upper mold and a lower mold.
  • the raw material for the outer mold the same as the raw material for making the inner mold in the prior art, including sand and resin, and further includes the curing agent "triethylamine"; in a specific embodiment, the phenolic resin sand is taken as an example.
  • a phenolic resin is added to the sand to form a resin sand.
  • the upper mold and the lower mold of the outer mold sand type are solidified by a spray curing agent triethylamine.
  • the proportion of the general phenolic resin in the sand is 1.0 - 3.0%, and the amount of the upper and lower mold sprayed triethylamine is 0.10 - 0.30% of the weight of the sand.
  • the proportion of the phenolic resin added to the sand is preferably 1.5%, and the preferred amount of the upper mold and the lower mold sprayed triethylamine is 0.18%.
  • Method of making the outer mold First, the sand and the resin are mixed, and then the mixture is placed in the outer mold upper mold and the lower mold sand mold, and then sprayed with triethylamine to be solidified to form the upper mold and the lower mold. ;
  • a phenolic resin is added to the sand to form a resin sand, and when the sand mold is formed in a cold press molding machine with a resin sand, the upper mold and the lower mold of the outer mold sand type are solidified by a spray curing agent triethylamine. forming.
  • the materials and manufacturing methods of the upper core and the lower core of the inner core are substantially the same as those of the prior art.
  • the inner core can also be made by other methods, for example, it can be mixed with river sand, black fat oil, and manually. It is made by molding and baked in a kiln. This is also a mature existing technology, so it will not be described again.
  • a casting hole is disposed on the mold corresponding to the intermediate spindle hole of the single cylinder diesel engine body, and a casting sprue is disposed in the mold to connect the pouring hole and a pouring space forming a single cylinder diesel engine body; the pouring hole
  • the runner is formed with a transition runner.
  • a discharge through hole is disposed on a position of the mold corresponding to the main shaft hole of the single cylinder diesel engine body adjacent to the gate through hole;
  • the structure of the mold used in the embodiment is: including an outer mold and an inner core
  • the outer mold and the inner core constitute a body pouring space corresponding to the shape of the single-cylinder diesel engine body, and have a gate and a transition passage connecting the upper mold and the upper core and the casting space formed by the lower mold and the lower core:
  • the upper mold 1 of the outer mold is provided with a gate through hole 11 corresponding to the intermediate spindle hole of the single cylinder diesel engine body, and the transition gate of the inner gate through hole of the upper mold 1 is connected with the pouring space of the inner surface of the upper mold.
  • a convex flange 11a is formed on the inner end surface of the gate through hole of the upper mold 1, and three grooves lib are formed on the flange 11a along the radial direction of the opening to form a transition runner.
  • the gate through hole 11 communicates with the body pouring space 12.
  • a collecting recess 21 is provided on the lower mold inner surface of the lower mold 2 of the outer mold and the gate through hole on the upper mold, and a convex flange 21a is provided on the end surface of the inner port of the recess. Providing three grooves 21b along the opening of the flange 21a to form a transition runner, which communicates with the body pouring space 22 on the inner side of the lower die;
  • a through hole 31 is formed in the upper core 3 of the inner core at a position aligned with the gate through hole 11 formed in the upper mold 1 of the outer mold, and a flange is provided at a downward opening of the through hole 31.
  • 31a, on the lower end surface of the flange 31a is provided with a mouth structure 31b;
  • a through hole 41 is defined in the lower core 4 of the inner core at a position aligned with the through hole 31 formed in the upper core 3.
  • the upwardly facing opening of the through hole 41 is provided with a flange 41a on the flange 41a.
  • a stopper structure 41b is provided on the end surface to match the nozzle structure on the through hole 31 of the upper core 3 to form a sealing structure.
  • the sealing structure also has a positioning function.
  • a sealing structure is formed between the gate through hole 11 on the upper mold 1 and the through hole 31 on the upper core 3 and between the recess 21 on the lower mold 2 and the through hole 41 on the lower core 4.
  • the sealing structure may be: a lower end surface of the gate through hole 11 on the upper mold 1 is attached to an upper end surface of the through hole 31 corresponding to the upper core 3; The upper end surface of the recess 21 is in contact with the lower end surface of the through hole 41 corresponding to the lower core 4.
  • the transition runner connects the body pouring space between the upper die 1 and the upper core 3 with the body pouring space between the lower core 4 and the lower die 2.
  • the exhaust passage may be specifically arranged such that a discharge through hole 13 is provided at the position of the two balance holes of the upper mold 1, and a flange 13a is provided on the orifice.
  • An exhaust communication hole 33 is defined in a position corresponding to the exhaust through hole 13 of the upper mold 1 on the upper core 3 of the inner core, and the exhaust communication hole 33 communicates with the exhaust gas on the upper mold 1
  • the flange 13a on the opening of the hole 13 is fitted to form a sealing structure therebetween.
  • the exhaust through-hole 11 on the upper mold 1 and the transitional exhaust communication hole 33 on the upper core 3 constitute an exhaust passage that communicates with the outside space A between the upper and lower cores of the inner core.
  • Matching stop structures 14 and 24 are provided on the peripheral edges of the upper mold 1 and the lower mold 2 in contact with the outer mold.
  • Matching stop structures 34 and 44 are provided on the peripheral edges of the upper core 3 and the lower core 4 in contact with the inner core.
  • the lower core 4 is placed in the lower mold 2, and the upper core 3 is fastened to the lower core 4 (as shown in FIG. 4). Then, the upper mold 1 is fastened to the lower mold 2, and the upper and lower molds have a mouth fit, and then The locking and clamping device is clamped by the locking clamp device; as shown in FIG. 4, the locking clamp device for clamping can be a lower pad 51, an upper pressing plate 52 and a fastener 53, and the lower pad pad 51 is below the lower die 2.
  • the upper pressing plate 52 is placed on the upper mold 1 , and the reinforcing member 53 is disposed on the side of the mold, which is a C-shaped fastening hook, and the upper and lower ends of the fastening hook are clamped on the lower bottom surface of the lower pad and the upper pressing plate surface;
  • a hole is formed in the gate through hole and the exhaust through hole on the upper upper mold to expose the gate through hole and the exhaust through hole.
  • the lower pad 51 and the upper platen 52 are preferably iron plates.
  • Cooling is preferably natural cooling.
  • the exhaust passage can be arranged like this:
  • the exhaust through hole on the mold may also be disposed at a position of a camshaft hole of a corresponding single cylinder diesel engine body of the upper mold, or a spindle hole corresponding to the body of the single cylinder diesel engine is disposed beside the gate through hole Positionally, exhaust through holes are provided at corresponding places on the upper core and constitute a corresponding sealing structure.
  • the blank 7 of the single cylinder diesel engine body produced by the process and the mold provided by the present invention is as shown in Fig. 8, and the transition runner forms an iron rod 71. It is cast with the prior art process and mold as shown in Figures 2 and 3.
  • the upper horizontal iron bar 08 is much smaller than the vertical gate iron block 08a, and the consumed molten iron is greatly reduced.
  • the cost of the mold provided by the present invention is taken as an example to produce a blank of the 1110 type body, and the cost and profit of the casting process and the used mold processing body and the old process provided by the present invention are calculated, and the single-cylinder diesel engine is processed by using the above-mentioned process and using the above-mentioned mold.
  • the body compared to the existing old process, one ton of molten iron can be cast from only 16 castings to 20 castings, and the castings produced by the casting process and the mold of the invention do not have transverse iron bars on the existing castings. With high positioning accuracy and improved casting accuracy, the weight of each casting blank can be reduced from 57 kg to 48 kg.
  • Comprehensive accounting using the new process provided by the present invention, using a new structure of the mold, the added value of 546.3 yuan per ton of iron.
  • the specific data and measurement process are shown in Table 1. Therefore, by using the casting process and the mold, the outer mold which is backward in the old process but lower in cost can be replaced with the technology and materials which have been used in the prior art, and the performance and strength are superior, but the cost is obtained.
  • the outer mold used in the casting of the body of an automobile multi-cylinder engine and the structure of the matched locking clamp device is a horizontal split structure, including the upper mold 200 and The lower mold 300, the upper mold 200 is fastened to the lower mold 300, and a space formed between the upper and lower molds is provided with a corresponding inner core in the space, and a space between the outer mold and the inner core constitutes a pouring space;
  • a gate through hole 201 is formed in an intermediate portion on the oil bottom surface of the corresponding engine of the upper mold, and a gate cup 202 is disposed on the gate through hole.
  • An exhaust through hole 203 is disposed beside the oil gate through hole:
  • the upper and lower dies are cooperatively positioned by the mortises 203 and 301 disposed therebetween, and are clamped and locked by a locking clamp 400 disposed outside the outer mold, the locking clamps causing the upper mold and The lower molds are fixed together.
  • the locking and clamping device comprises a lower pad 401, an upper pressing plate 402 and a fastener 403.
  • the lower pad is under the lower die, and the upper pressing plate is placed on the upper die, and a fastener is arranged on the side of the die.
  • the two ends of the upper pressing plate 402 are respectively provided with holes 402a and 402b corresponding to the gate through hole 201 and the exhaust through hole 203 on the upper die, so that the gate is opened. The holes and the exhaust through holes are exposed.
  • the outer mold of the multi-cylinder engine body is produced, and the raw material is the same as the single-cylinder diesel engine described above, including sand and resin, and further includes a curing agent "triethylamine";
  • Method of making the outer mold First, the sand and the resin are mixed, and then the mixture is placed in the upper mold and the lower mold sand mold in the outer mold, and pressure-molded at normal temperature, and then sprayed "three Ethylamine" is solidified and formed into the upper and lower molds;
  • the raw material for the outer mold the same as the raw material for making the inner mold in the prior art, including sand and resin, and further includes the curing agent "triethylamine"; in a specific embodiment, the phenolic resin sand is taken as an example. Adding phenolic resin to the sand to make a resin sand, which is used when forming a sand mold in a cold press molding machine with resin sand. The over-curing curing agent triethylamine cures the upper and lower molds of the outer mold sand type. Generally, the proportion of the phenolic resin in the sand is 1.0 - 3.0%, and the amount of the upper and lower mold sprayed triethylamine is 0.10 - 0.30% of the weight of the sand.
  • the proportion of the phenolic resin added to the sand is preferably 1.5%, and the preferred amount of the upper mold and the lower mold sprayed triethylamine is 0.18%.
  • Method of making the outer mold First, the sand and the resin are mixed, and then the mixture is placed in the outer mold upper mold and the lower mold sand mold, and then sprayed with triethylamine to be solidified to form the upper mold and the lower mold. ;
  • a phenolic resin is added to the sand to form a resin sand, and when the sand mold is formed in a cold press molding machine with a resin sand, the upper mold and the lower mold of the outer mold sand type are solidified by a spray curing agent triethylamine. forming.
  • the transition runner is also disposed inside the mold as the single cylinder diesel engine body.
  • the number of transition gate cast iron 501 is relatively small, which can reduce the casting to the molten iron. Consumption, reduced energy consumption and machining volume.
  • the material and manufacturing method of the outer mold are basically the same as those of the aforementioned single cylinder diesel engine.
  • the process of the utility model can be vigorously promoted and used in the foundry industry. Any traditional molding process in which the outer mold is made of clay sand and added into two sand boxes in the upper and lower boxes and horizontally divided into two pieces can adopt the new process of the utility model.
  • the outer mold provided by the present invention can also be used for the casting of gearboxes, flywheel shells, motor casings, reducer casings, and cylinder heads of various cylinders which are also capable of horizontally splitting the outer mold.
  • the ratio of sand to resin can be adjusted according to the characteristics of the casting material of the product.
  • the resin is sanded, and the curing agent is used, and the cold press molding at normal temperature eliminates the use of the outer casing of the outer casing in the production of the conventional casing, which can also reduce the cost. Simplify the process. There is no moisture in the outer mold to ensure the quality of the casting.
  • Table 1 Table of Benefits Analysis of New and Old Manufacturing Process for Single Cylinder Diesel Engine Body (Taking 1110 Volume Blanks as an Example)

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé de coulée à faible teneur en carbone économisant l'énergie pour un bloc moteur diesel monocylindre. Le procédé comprend la fabrication d'un moule de coulée. Des sables enrobés de résine et un solidifiant à base de triéthylamine sont utilisés pour la fabrication d'un moule extérieur ; un canal d'alimentation du moule est disposé à l'emplacement du trou d'arbre principal du bloc moteur ; un échappement est disposé à l'emplacement du trou de l'arbre d'équilibrage du bloc moteur. Le procédé de coulée selon l'invention améliore la résistance du moule extérieur et réduit l'apparition du phénomène de reprise de coulée. Les frais d'exploitation sont réduits. L'invention concerne un moule de coulée pour un bloc moteur diesel monocylindre, qui comprend un moule extérieur, un cœur intérieur, et un appareil de fixation. L'invention concerne également un bloc moteur multicylindres divisé horizontalement, un moule de coulée extérieur et un procédé associé de coulée à faible teneur en carbone économisant l'énergie.
PCT/CN2011/078519 2010-08-20 2011-08-17 Moule de coulée pour un bloc moteur diesel monocylindre, bloc moteur multicylindres divisé horizontalement, moule de coulée extérieur, et procédé associé de coulée à faible teneur en carbone économisant l'énergie Ceased WO2012022261A1 (fr)

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CN2010102594612A CN101992273A (zh) 2010-08-20 2010-08-20 单缸柴油机机体节能低碳铸造工艺及其铸造模具
CN201010259461.2 2010-08-20
CN201110034552.0 2011-01-31
CN 201110034552 CN102069154B (zh) 2010-08-20 2011-01-31 单缸柴油机机体铸造模具与水平分型的多缸机体和铸件用铸造外模及其节能低碳铸造工艺

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CN101992273A (zh) * 2010-08-20 2011-03-30 韩士政 单缸柴油机机体节能低碳铸造工艺及其铸造模具
CN103658539A (zh) * 2012-09-17 2014-03-26 广西玉柴机器股份有限公司 浇注系统砂芯结构
CN103878325B (zh) * 2012-12-19 2016-06-15 江苏华东风能科技有限公司 风力发电机轮毂铸件的铸造浇注系统
CN103878312B (zh) * 2012-12-19 2016-08-31 江苏华东风能科技有限公司 风力发电机锥形支撑铸件的铸造浇注系统
CN103433428B (zh) * 2013-09-12 2016-01-20 赵秋会 一种复合铸造方法
CN104439090A (zh) * 2014-11-26 2015-03-25 山东省源通机械股份有限公司 高强度单缸柴油机机体的生产工艺
CN107520411A (zh) * 2017-07-25 2017-12-29 盐城美希密封件有限公司 一种柴油机模具静密封紧固夹紧装置
CN107617721A (zh) * 2017-08-30 2018-01-23 重庆市机电设计研究院 自动化铸造生产工艺
CN111069538A (zh) * 2020-01-17 2020-04-28 象山诺信机械制造有限公司 一种特种车辆变速箱的成型模具及成型工艺
CN112404360B (zh) * 2020-10-28 2025-05-13 昆山新三信机械模具有限公司 适用于飞轮壳制造的铸铝模具

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