JP3865098B2 - Mold opening control tool - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a mold opening control tool for preventing mold opening between an upper mold and a lower mold in a resin mold and for regulating a mold opening distance between an upper mold and a lower mold.
[0002]
[Prior art]
Various shapes of plastic molded products are different depending on a target product, a place where the product is used, and the like, and a shape suitable for the place of use is manufactured. In the production of this plastic molded product, a resin mold is designed according to its shape, and a resin mold is manufactured for each product.
[0003]
The produced resin mold is made by pressing a resin into a space that is a product molding part formed in a core insert and molding to produce a plastic molded product. The resin molded product molded in this product molding part is moved up and down. Since the upper part and the lower part are engaged with each other, the upper part and the lower part are engaged with each other. For this reason, when the produced resin mold is transported to the user, it is conventionally fixed so that the upper mold and the lower mold do not rattle during transportation. Conventionally, a fixing link 70 as shown in FIG. 12 has been used to fix the upper mold and the lower mold during the transportation (preventing mold opening). The fixing link 70 is formed by forming two holes 71 and 72 in a rectangular plate. As shown in FIG. 13, a bolt 73 is fitted into the holes 71 and 72, and the upper die 90 and The lower die 95 is fixed together. The fixing link 70 is used for fixing the upper mold and the lower mold during transportation (preventing mold opening), and is removed after the resin mold is installed.
In the case of a resin mold, the upper mold and the lower mold are engaged with each other, the resin is press-molded into the space that is the product molding part formed in the core insert, and the resin molded product molded in the product molding part is movable. The lower die which is the side is moved, and the upper die and the lower die are separated by a parting line and opened (die opening) to be taken out. The distance between the mold opening of the upper mold and the lower mold only needs to be a sufficient distance to take out the resin molded product molded in the product molding section. Thus, if the opening distance when the mold is opened is small, it is difficult to smoothly take out the resin molded product, which causes a decrease in productivity.
[0004]
Therefore, after the fixing link 70 for preventing the mold opening is removed, the tension link as shown in FIG. 14 is used to regulate the opening distance of the lower mold 95 when the lower mold 95 is moved and the resin molded product is taken out. 80 will be attached. The bolt holes used when attaching the tension links are often the bolt holes used when attaching the fixing links 70 for preventing mold opening. As shown in FIG. 14, this tension link 80 has a round hole 81 and a long hole 82 formed in a rectangular plate, and the thickness of the side 80A on which the round hole 81 is formed has a long hole 82. A stepped portion 83 is formed to be thicker than the wall thickness on a certain side. Since the tension link 80 is fixed to the upper die 90 on the fixed side with the stepped portion 83 on the upper die 90 side, the bolt 84 is fitted into the round hole 81 and screwed into the upper die 90 and fixed. The bolt 84 is in a single-supported state, and a gap 87 is formed between the surface of the lower die 95 side where the elongated hole 82 of the tension link 80 is formed and the lower die 95. A tap hole 86 is formed in the lower die 95 on the movable side, and a bolt 85 is screwed into the tap hole 86 through the long hole 82 of the tension link 80. The bolt 85 is slidably fitted into the long hole 82, and when the lower mold 95 on the movable side is opened, the lower mold 95 side surface and the lower mold 95 side of the elongated hole 82 forming side of the tension link 80. The lower die 95 is opened by the length of the long hole 82 by moving without contact with the side surface (the bolt 85 also moves in the long hole 82 at this time).
[0005]
[Problems to be solved by the invention]
In the conventional link, there are a fixing link for preventing the upper mold and the lower mold from rattling during transportation, and a lower mold on the movable side for taking out the resin molded product molded in the product molding section. Two pulling links that restrict the distance by which the upper die and the lower die are moved must be used, which increases the number of parts and has the problem that there is no degree of freedom for each part.
[0006]
Also, when the resin mold is usually large and both the upper mold and the lower mold have a considerable load, the upper mold and the lower mold are opened too much by moving the lower mold on the movable side (overstroke) In this case, an abrupt force is applied to the end portion of the elongated hole 82 of the tension link, and the bolt to which the tension link that cannot be sustained by this load is broken is broken at a particularly weak thread portion. For this reason, the bolt that attaches the broken tension link must be replaced with a new bolt, and the resin molding operation must be interrupted each time this replacement occurs, resulting in a problem that work efficiency (productivity) decreases. ing.
[0007]
The object of the present invention is to prevent the mounting bolt from being broken even if the lower die on the movable side is moved to open the upper die and the lower die too much (overstroke) and a load is applied. The purpose is to prevent a decrease in efficiency (productivity).
[0008]
[Means for Solving the Problems]
  The mold opening control tool according to claim 1 is formed in a rectangular shape, an island part is formed in the approximate center, and a mold opening control plate formed by forming two elongated holes in the longitudinal direction across the island part. ,
  A thread part, a shank part larger in diameter than the thread part, and a head part larger in diameter than the shank part are formed with a groove around the shank part, and a snap ring is detachably fitted in the groove. Plate mounting bolts,
  Consists of
  The plate opening control plate is fitted into the long holes of the mold opening control plate so that the plate mounting bolts are slidably fitted in the long holes and are sandwiched between the heads of the plate mounting bolts and the snap rings. To the plate mounting bolt,
  A counterbore hole is formed in each of the fixed side mold plate and the movable side mold plate of the resin mold, and a tap having a predetermined depth is formed at the bottom of the counterbore hole, and the long hole of the mold opening control plate is The plate mounting bolt is passed through, the threaded portion of the plate mounting bolt is screwed into the tap, and the tip is fitted into the counterbore hole from the groove of the shank portion of the plate mounting bolt. .
  By configuring in this way, the lower die on the movable side is moved to open the upper die and the lower die too much (overstroke), so that the bolts are not broken even if a load is applied, and the work efficiency (production) Property) can be prevented.
  Further, even if the plate mounting bolt is removed from the fixed side mold plate and the movable side template plate, it is possible to prevent the mold opening control plate and the plate mounting bolt from being separated.
[0009]
  The mold opening control tool according to claim 2 is the mold opening control tool according to claim 1,The relationship between the diameter L1 of the shank portion of the plate mounting bolt and the length L2 of the shank portion of the portion that fits into the counterbore hole formed in the movable mold plate and the fixed mold plate of the resin mold,
              L1 : L2 = 1: (0.5 to 1.5)
It is what.
The mold opening control tool according to claim 1.
  By configuring in this way,The lower die on the movable side is moved to open the upper die and lower die too much (overstroke), and the bolt breaks even if a load is applied.Can be prevented.
[0010]
  The mold opening control tool according to claim 3 is the mold opening control tool according to claim 1 or 2, wherein the diameter L1 of the shank portion of the plate mounting bolt,Mold opening control plate thickness L3Relationship with
              L1:L3 = 1: (0.5 to 1.5)
It is what.
  By configuring in this way, it is possible to prevent the bolt from being broken even if the lower die on the movable side is moved to open the upper die and the lower die too much (overstroke) and a load is applied.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below.
In producing a plastic molded product, a resin molding method is adopted in which a resin is press-fitted into a resin mold die suitable for the shape. This resin molding method produces a large amount of plastic molded parts in a short time by injecting molten resin at high temperature, mechanical pressure, pneumatic pressure or hydraulic pressure into a mold that is manufactured to the same dimensions as the product by machining. It is a plastic molding method.
[0014]
  Figure 14FIG. 1 is a resin mold for applying a mold opening control tool according to an embodiment of the present invention, FIG. 1 is a front view of the resin mold, FIG. 2 is a plan view of a fixed side of the resin mold, FIG. 3 is a bottom view of the movable side of the resin mold, and FIG. 4 is a right side view of the resin mold shown in FIG.
  Some of the parts shown in the figures have lines that do not exist in the parts in the drawings, but this is expressed in relation to other members. It is unique to the figure.
[0015]
1 to 4, reference numeral 1 denotes a resin mold, which includes a fixed side 2 and a movable side 3.
The fixed side 2 includes a fixed side mounting plate 4, a runner stripper plate 5, and a fixed side mold plate 6. The fixed side mold plate 6 is attached to the fixed side mounting plate 4 via the runner stripper plate 5. Yes. A parting line 7 separates the fixed side 2 and the movable side 3.
Reference numeral 8 denotes a locating ring, and the locating ring 8 is attached to the fixed side mounting plate 4 by a fastening bolt 9.
Reference numeral 10 denotes a spool bush, and the spool bush 9 is attached to the locate ring 8 by a fastening bolt 11.
Reference numeral 12 denotes a hook attachment tap hole formed in the fixed side template 6, and a hook 13 is attached to the hook attachment tap hole 12.
[0016]
The movable side 3 is composed of a movable side mold plate 14, a spacer block 15, an upper ejector plate 16, a lower ejector plate 17, and a movable side mounting plate 18, and the movable side mold plate 14 is composed of two spacer blocks 15. It is attached to the movable side attachment plate 18 via ejector plates 16 and 17.
19 is a return pin, 20 is a return pin spring, 21 is an ejector rod, and 22 is a tightening bolt.
Reference numeral 23 denotes an ejector guide pin, which includes an ejector pin, an ejector guide bush, and a bolt.
Reference numeral 24 denotes a support pillar, which includes a pillar and a bolt for stopping the pillar.
Reference numeral 25 denotes a shoulder bolt, and 26 denotes a hook mounting tap hole formed in the movable side template 14. A hook 27 is attached to the hook attachment tap hole 26.
[0017]
28 is a core insert of the resin mold 1, and 29 is a product molding part. The insert 28 can be divided into two parts in order to take out the resin molded product formed by pressure injection of the resin in the product molding part 29. Reference numeral 30 denotes a fixed side insert fixed to the fixed side mold plate 6 of the resin mold 1, and reference numeral 31 denotes a movable side insert fixed to the movable side mold plate 14 of the resin mold 1. A parting line 32 opens the core insert 28 by separating the fixed insert 30 and the movable insert 31 in order to take out the resin molded product formed in the product forming portion 29.
[0018]
Reference numeral 33 denotes a temperature adjustment passage, which is a passage for refrigerant (air, water, oil, etc.) formed in the longitudinal direction in the movable side insert 31 of the core insert 28. Reference numeral 34 denotes a temperature control pipe, which is connected to the outside of the movable side insert 31 of the core insert 28, and an O-ring 35 is provided between the members constituting the movable insert 31 of the core insert 28. Reference numeral 36 denotes a temperature control path, which is a temperature adjusting refrigerant flow path that cools the vicinity of the product forming portion 29 of the movable side insert 31 of the core insert 28. A partition plate is formed in the center for branching into two flows.
[0019]
A slider 37 is slid to open the fixed side insert 30 and the movable side insert 31 of the core insert 28. Reference numeral 38 denotes a slide stop pin for moving the movable side insert 31 of the core insert 28 to stop the slider 37 at a predetermined distance when the core insert 28 is opened. The slide stop pin 38 includes a pin and a slide stopper.
Reference numeral 39 denotes a locking block that locks the slider 37 of the core insert 28 so that it does not move during resin molding and performs positioning when the slider 37 is locked to the fixed insert 30 of the core insert 28. The locking block 39 is fixed by bolts.
Reference numeral 40 denotes an angular pin, which moves the movable side insert 31 when the core insert 28 is opened, and determines in which direction and how much the slider 37 is slid. From the fixed insert 30 of the core insert 28 to the slider 37 It can be hung and attached.
Reference numeral 41 denotes an ejector pin for moving the movable side insert 31 of the core insert 28 to open the core insert 28 and then ejecting a plastic product from the product molding portion 29. Reference numeral 42 denotes an ejector sleeve, which is a cylindrical part into which the center pin 43 is inserted. The center pin 43 is for forming a boss hole in a plastic product molded by the product molding portion 29. Reference numeral 44 denotes a fixed nesting pin for forming a boss hole in a plastic product molded by the product molding portion 29.
[0020]
Reference numeral 45 denotes a runner gate lock pin, a gate for supplying the molten resin to the product molding portion 29, a sprue that is a processing hole connected to the gate, a runner that is a molten resin injection port, and a tip inserted into the runner. The runner lock pin is used to separate the solidified resin at the gate tip from the solidified plastic product. That is, when the molten resin is supplied from the runner to the product molding part 29 through the sprue and gate, and the resin filled in the product molding part 29 is cooled and solidified to form a plastic product, Similarly, the resin filled in is solidified. If the core insert 28 is opened as it is, the plastic product is attracted to the resin at the gate tip and moves to the fixed side insert 30, making it difficult to separate the resin at the gate tip from the plastic product.
Therefore, before opening the fixed side insert 30 and the movable side insert 31 of the core insert 28, the runner, sprue, gate processed member and the runner lock pin attached to the runner are inserted a little before opening the fixed insert 30 and the movable insert 31. It is open. When this runner, sprue, gate processed member and runner lock pin with the tip inserted into the runner are opened, the runner lock pin will pull out the resin stuck to the tip of the runner lock pin. Thus, the solidified resin filled in the runner, sprue, and gate is pulled out, and the resin at the tip of the gate and the plastic product are separated. Thereafter, if the fixed side insert 30 and the movable side insert 31 of the core insert 28 are opened, the plastic product molded by the product forming portion 29 is moved to the movable side.
[0021]
A taper give liner 46 is fixed at a predetermined position without causing a shift in the mating surfaces of the fixed side insert 30 and the movable side insert 31 when the fixed side insert 30 and the movable side insert 31 of the core insert 28 are closed. It is a member for positioning so that.
[0022]
Reference numeral 47 denotes a distance spacer. The distance spacer 47 is fixed on the fixed side of the resin mold 1 when the elbow unit part mounting surface of the wall 30 of the fixed side insert 30 of the resin mold 1 is placed downward. This is to protect the elbow unit parts exposed and attached to the wall surface of the insert 30 from being destroyed by the load of the resin mold 1.
Reference numeral 48 denotes a core core provided with the product forming portion 29, 49 and 50 are slider guide rails, and 51 is a positioning block. This positioning block 51 is for assembling so that there is no deviation in the mating surfaces of the fixed side insert 30 and the movable side insert 31 when the fixed side insert 30 and the movable side insert 31 of the resin mold 1 are combined. is there.
[0023]
A mold opening control tool 52 is forcibly operated when the movable side insert 31 opens the fixed side insert 30 of the resin mold 1. As shown in FIG. 4, the mold opening control tool 52 includes a mold opening control plate 53 and plate mounting bolts 56.
As shown in FIGS. 5A and 5B, the mold opening control plate 53 is formed with two elongated holes 54A and 54B, leaving an island portion 55 at the center of the rectangular plate. A plate mounting bolt 56 is slidably fitted in each of the long holes 54A and 54B in the longitudinal direction of the long holes 54A and 54B.
[0024]
The plate mounting bolt 56 is configured as shown in FIG. That is, the plate mounting bolt 56 includes a head 57, a shank portion 58, and a screw portion 59. A hexagonal counterbore hole 60 is formed in the head portion 57 of the plate mounting bolt 56. In addition, a groove 61 that circulates is formed in the shank portion 58, and a snap ring (E-ring) 62 is detachably fitted in the groove 61. The diameter of the shank portion 58 and the diameter of the screw portion 59 are
Shank diameter> Screw diameter
The relationship is formed.
[0025]
The plate mounting bolt 56 and the mold opening control plate 53 are configured such that the plate mounting bolt 56 is fitted into each of the long holes 54A and 54B formed in the mold opening control plate 53, and the snap ring is inserted into the groove 61 of the plate mounting bolt 56. (E-ring) 62 is fitted and combined, and the mold opening control tool 52 is configured by the plate mounting bolt 56 and the mold opening control plate 53.
[0026]
Thus, the mold opening control tool 52 is attached so as to connect the fixed side 2 and the movable side 3 of the resin mold 1. That is, as shown in FIG. 7, the mold opening control tool 52 is configured by mounting holes 64 (bore holes 63 and tapped holes 66) formed in the fixed side mold plate 6 on the fixed side 2 of the resin mold 1. The plate mounting bolt 56 is screwed to the mounting hole 65 (formed by the counterbore hole 63 and the tap hole 66) formed in the movable side mold plate 14 on the movable side 3 of the resin mold 1. The bolt 56 is attached by screwing. That is, a counterbore hole 63 is formed in the movable side mold plate 14 on the movable side 3 of the resin mold 1 (and the fixed side mold plate 6 on the fixed side 2 of the resin mold 1). A tapped hole 66 having a diameter smaller than the counterbore hole 63 is formed at a predetermined depth (determined by industry standards) at the tip of the hole 63. The mold opening control tool 52, which is fitted into the elongated holes 54 </ b> A and 54 </ b> B of the mold opening control plate 53, is fitted with the snap ring 62 in the groove 61 of the shank portion 58, and is attached with the plate mounting bolt 56, The screw portion 59 is attached by being screwed into the tap hole 66. When the mold opening control tool 52 is attached to the movable side mold plate 14 on the movable side 3 of the resin mold 1 (and the fixed side mold plate 6 on the fixed side 2 of the resin mold 1), the plate mounting bolts are mounted. A portion of the 56 shank portion 58 is fitted into the counterbore hole 63, and the screw portion 59 of the plate mounting bolt 56 is screwed into the tap hole 66, and the two snap rings 62 are fitted into the grooves 61 of the shank portion 58. Thus, a certain distance (gap) is formed between the mold opening control plate 53 and the movable side 3 (fixed side 2) of the resin mold 1.
[0027]
The state shown in FIG. 7 is a state in which the fixed side 2 and the movable side 3 of the resin mold 1 are engaged with each other (closed state). The movable side 3 is indicated by an arrow A shown in FIG. When opened, the movable side 3 is guided by the mold opening control plate 53 and lowered downward, and the moving distance is regulated by the length of the long holes 54A and 54B of the mold opening control plate 53, and the movable side 3 is opened as shown in FIG. Become. The state shown in FIG. 9 is as shown in FIG. 10, in which the plate mounting bolt 56 is screwed onto the fixed side mold plate 6 on the fixed side 2 of the resin mold 1 by the movement (mold opening) of the movable side 3. Is in contact with the upper end of the elongated hole 54A of the mold opening control plate 53, and the plate mounting bolt 56 screwed to the movable side mold plate 14 on the movable side 3 of the resin mold 1 is connected to the mold opening control plate. Each of them is in contact with the lower end of the 53 long hole 54B. This state is a state where the mold is fully opened.
[0028]
In this way, the mold opening control tool 52 has a counterbore hole formed in the fixed-side mold plate 6 on the fixed side 2 with the tip portion from the groove 61 into which the snap ring 62 of the shank portion 58 of one plate mounting bolt 56 is fitted. 63, and the tip of the groove 61 for fitting the snap ring 62 of the shank portion 58 of the other plate mounting bolt 56 is screwed into the counterbore hole 63 formed in the movable side template 14 of the movable side 3. Since the movable side 3 is moved and the fixed side 2 and the movable side 3 are opened too much (over stroke), the plate mounting bolt 56 is connected to the plate mounting bolt 56 via the mold opening control plate 53. Even if a large amount of force is suddenly applied, the counterbore holes 63 on the fixed side 2 and the movable side 3 and the portion of the shank portion 58 fitted in the counterbore hole 63 can receive this load. It can by preventing the threaded portion 59 of the plate mounting bolt 56 is broken.
[0029]
The diameter L of the shank portion 58 of the plate mounting bolt 56 configured as described above.₁And a portion of the shank portion 58 of the plate mounting bolt 56 at the tip of the groove 61 into which the snap ring 62 is fitted, that is, the movable side mold plate 14 on the movable side 3 of the resin mold 1 (and the resin mold die). The length L of the portion that fits into the counterbore 63 formed in the fixed side plate 6 on the fixed side 2 of the mold 1₂Is the diameter L₁Is 1 for L₂Is 0.5 or more. That is, specifically,
L₁: L₂= 1: (0.5 to 1.5)
And optimally, L₁And L₂The relationship is 1: (0.8 to 1.1). Accordingly, in the case of a plate mounting bolt having a shank diameter of 30 mm, the length of the shank portion 58 that fits into the counterbore hole 63 of the movable side mold plate 14 (fixed side mold plate 6) is 15 mm to 45 mm. Become. In this case, the optimum value of the length of the shank portion 58 is 24 mm to 33 mm.
Diameter L of the shank portion 58 of the plate mounting bolt 56₁And the length of the portion that fits into the counterbore hole 63 formed in the movable side mold plate 14 on the movable side 3 of the resin mold 1 (and the fixed side mold plate 6 on the fixed side 2 of the resin mold 1). L₂The ratio of
L₁: L₂= 1: (0.5 to 1.5)
The diameter L₁Is 1 for length L₂Is less than 0.5, the movable side 3 is moved, the fixed side 2 and the movable side 3 are opened too much and an overstroke occurs, and a large force is suddenly applied to the plate mounting bolt 56 via the mold opening control plate 53. In this case, the portion of the shank portion 58 fitted in the counterbored hole 63 falls off from the counterbored hole 63 and the overstroke load is received by the threaded portion 59, and the plate mounting bolt 56 is damaged by the threaded portion 59. Because it will end up.
Diameter L₁Is 1 for length L₂Is more than 1.5, the depth of the counterbore hole 63 and the tap hole 66 formed in the movable side mold plate 14 of the movable side 3 and the fixed side mold plate 6 of the fixed side 2 becomes too deep, and other members Because it will buffer.
[0030]
Further, the diameter L of the shank portion 58 of the plate mounting bolt 56₁And the thickness of the mold opening control plate 53 (the portion from the inside of the head 57 to the groove 61 in which the snap ring 62 is fitted in the shank portion 58 of the plate mounting bolt 56) L_ThreeIs the diameter L₁1 for thickness L_ThreeIs 0.5 to 1.5. That is,
L₁: L_Three= 1: (0.5 to 1.5)
And optimally L₁And L_ThreeThe relationship is 1: (0.8 to 1.2). Therefore, if the plate mounting bolt has a shank diameter of 30 mm, the thickness of the mold opening control plate 53 is 15 mm to 45 mm. In this case, the optimum value of the length of the shank portion 58 is 24 mm to 36 mm.
[0031]
Diameter L of the shank portion 58 of the plate mounting bolt 56₁And the thickness L of the mold opening control plate 53_ThreeThe ratio of
L₁: L_Three= 1: (0.5 to 1.5)
The diameter L₁1 for thickness L_ThreeIs less than 0.5, the movable side 3 is moved, the fixed side 2 and the movable side 3 are opened too much, an overstroke occurs, and a large force is suddenly applied to the plate mounting bolt 56 via the mold opening control plate 53. In this case, even if the load is received by the plate mounting bolt 56, the mold opening control plate 53 cannot withstand the load and the mold opening control plate 53 is damaged.
Diameter L₁1 for thickness L_ThreeWhen the value exceeds 1.5, the mold opening control plate 53 becomes heavier than necessary and the mobility becomes worse, and the length of the plate mounting bolt 56 for mounting the mold opening control plate 53 must be made longer than necessary. Because.
[0033]
Further, according to the present embodiment, even if the movable side 3 is moved and the fixed side 2 and the movable side 3 are opened too much (overstroke), a very rapid force is applied to the mold opening control plate 53. Since this load is received by the counterbore 63 and the shank portion 58, the plate mounting bolt 56 can be prevented from being broken at the screw portion 59, the plate mounting bolt need not be replaced, and the resin molding operation is not interrupted. It is possible to prevent incurring efficiency (productivity).
[0034]
【The invention's effect】
  According to the first aspect of the present invention, the lower die on the movable side is moved so that the upper die and the lower die are opened too much (overstroke), and the bolt is not broken even if a load is applied. A decrease in efficiency (productivity) can be prevented.
  Further, even if the plate mounting bolt is removed from the fixed side mold plate and the movable side template plate, it is possible to prevent the mold opening control plate and the plate mounting bolt from being separated.
[0036]
  Claim2According to the invention described in (4), the bolt does not break even if the upper die and the lower die are moved too far by moving the lower die on the movable side (overstroke) and the load is applied, and the work efficiency (production) Property) can be prevented.
[0037]
  Claim3According to the invention described in (1), it is possible to prevent the bolt from being broken even if the lower die on the movable side is moved to open the upper die and the lower die too much (overstroke) and a load is applied.
[Brief description of the drawings]
FIG. 1 is a front view showing the inside of a resin mold to which a mold opening control tool according to the present invention is applied.
2 is a plan view of a movable side of the resin mold shown in FIG. 1. FIG.
3 is a bottom view of the fixed side of the resin mold shown in FIG. 1. FIG.
4 is a front view in which the inside of the resin mold shown in FIG. 1 is omitted. FIG.
FIG. 5 is a view showing a mold opening control plate of the mold opening control tool according to the present invention.
FIG. 6 is a perspective view of a plate mounting bolt of the mold opening control tool according to the present invention.
FIG. 7 is a cross-sectional view showing a state in which the mold opening control tool according to the present invention is attached to a fixed side mold plate and a movable side mold plate.
8 is a partially enlarged view of a state in which the mold opening control tool shown in FIG. 7 is attached to a fixed side mold plate and a movable side mold plate. FIG.
FIG. 9 is a front view showing a state in which the fixed side mold plate and the movable side mold plate are opened with the mold opening control tool according to the present invention attached.
10 is a cross-sectional view of a state in which the mold opening control tool shown in FIG. 9 is attached to a fixed side mold plate and a movable side mold plate.
FIG. 11 is a front view of a plate mounting bolt of the mold opening control tool according to the present invention.
FIG. 12 is a front view of a conventional mold opening prevention link.
13 is a cross-sectional view showing a state in which the mold opening prevention link shown in FIG. 12 is attached to a fixed side mold plate and a movable side mold plate.
FIG. 14 is an overall view of a conventional tension link.
15 is a cross-sectional view showing a state in which the tension link shown in FIG. 14 is attached to a fixed side mold plate and a movable side mold plate.
[Explanation of symbols]
1 …………………………………………………… Resin mold
2 …………………………………………………… Fixed side
3 ………………………………………………… Moving side
6 ………………………………………………… Fixed side template
14 ……………………………………………… Moveable template
28 ……………………………………………… Core nesting
30 ……………………………………………… Fixed-side nesting
31 ……………………………………………… Moveable side nesting
51 …………………………………………………… Positioning block
52 …………………………………………………… Mold Opening Control Tool
53 ……………………………………………… Mold Opening Control Plate
54A, 54B …………………………………
55 ……………………………………………… Shimabe
56 ……………………………………………… Plate mounting bolt
57 …………………………………………………… Head
58 ……………………………………………… Shank Club
59 ……………………………………………… Threaded part
61 ……………………………………………………
62 …………………………………………………… Snap Ring
63 …………………………………………………… Counterbores
66 ……………………………………………… Tap hole

Claims (3)

A mold opening control plate which is formed in a rectangular shape, an island portion is formed at substantially the center, and two elongated holes are formed in the longitudinal direction across the island portion;
A thread portion, a shank portion having a diameter larger than that of the screw portion, and a head portion having a diameter larger than that of the shank portion. A groove is formed around the shank portion, and a snap ring is detachably fitted into the groove. Plate mounting bolts,
Consists of
The plate opening control plate is fitted into the long holes of the mold opening control plate so that the plate mounting bolts are slidably fitted in the long holes and are sandwiched between the heads of the plate mounting bolts and the snap rings. To the plate mounting bolt,
A counterbore hole is formed in each of the fixed side mold plate and the movable side mold plate of the resin mold, and a tap having a predetermined depth is formed at the bottom of the counterbore hole, and the long hole of the mold opening control plate is The plate mounting bolt is penetrated, the screw portion of the plate mounting bolt is screwed into the tap, and the tip portion is fitted into the counterbored hole from the groove of the shank portion of the plate mounting bolt and attached. The mold opening control tool. The relationship between the diameter L1 of the shank portion of the plate mounting bolt and the length L2 of the shank portion of the portion that fits into the counterbore hole formed on the movable mold plate and the fixed mold plate of the resin mold ,
L1 : L2 = 1: (0.5 to 1.5)
The mold opening control tool according to claim 1. The relationship between the diameter L1 of the shank portion of the plate mounting bolt and the thickness L3 of the mold opening control plate is as follows:
L1: L3 = 1: (0.5 to 1.5)
The mold opening control tool according to claim 1 or 2.

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