CN118809982A - A heating system for injection molding of an injection molding machine - Google Patents

Abstract

The invention discloses a heating system for injection molding of an injection molding machine, relates to the technical field of heating of injection molding machines, and aims to solve the technical problem that the heat radiation generated during the heating process easily leads to heat waste and reduced heating efficiency, and comprises an injection molding machine body, a primary heating zone and a secondary heating zone, wherein the injection molding machine body comprises a table top, a barrel is arranged above the table top, the primary heating zone and the secondary heating zone are arranged on the circumferential outer wall of the barrel, the secondary heating zone comprises an electric heating component, the electric heating component is used to provide the required heat for heating the secondary heating zone, the secondary heating zone also comprises an insulating cylinder, the insulating cylinder is used to enclose the area between the primary heating zone and the secondary heating zone to form a connecting channel, the primary heating zone comprises a barrel sleeved on the circumferential outer wall of the barrel, the inner cavity of the barrel forms a heat channel, and the heat channel is connected to the connecting channel. The invention has the advantages of reducing energy consumption and improving heating efficiency.

Description

A heating system for injection molding of an injection molding machine

Technical Field

The invention relates to the technical field of heating of injection molding machines, and more particularly to a heating system for injection molding of injection molding machines.

Background Art

There are many ways to form or connect plastics, including injection molding using an injection molding machine. Injection molding is a process of making thermoplastic plastics or thermosetting plastics into plastic products of various shapes using a plastic molding mold, and then obtaining a molded product by cooling and solidifying. The main function of the heating system for injection molding of the injection molding machine is to heat the plastic raw materials to a suitable molten state so that injection molding can be carried out smoothly. The plastic particles enter the barrel through the hopper, and the heating device outside the barrel heats the plastic to a molten state. At the same time, the screw shears and mixes the plastic during rotation to make it plasticized evenly. Driven by the injection cylinder, the screw injects the molten plastic into the mold cavity at a certain pressure and speed.

The existing heating system for injection molding of injection molding machines usually winds the resistance wire in a spiral shape evenly around the entire barrel to heat the barrel as a whole. This heating method consumes a lot of energy, and the heat radiation generated during the heating process may be dissipated to the surrounding environment, resulting in heat waste and reducing heating efficiency. In view of this, we propose a heating system for injection molding of injection molding machines.

Summary of the invention

The object of the present invention is to provide a heating system for injection molding of an injection molding machine, so as to solve the technical problem that heat radiation generated during the heating process easily leads to heat waste and reduced heating efficiency.

In order to solve the above technical problems, the present invention provides the following technical solutions: a heating system for injection molding of an injection molding machine, comprising an injection molding machine body, a primary heating zone and a secondary heating zone; the injection molding machine body comprises a table top, a feeding port is arranged above the table top, and a barrel is connected to the bottom of the feeding port; the primary heating zone and the secondary heating zone are arranged on the circumferential outer wall of the barrel; the secondary heating zone comprises an electric heating component, and the electric heating component is used to provide the required heat for heating the secondary heating zone; the secondary heating zone also comprises an insulating cylinder, and the insulating cylinder is used to enclose the area between the primary heating zone and the secondary heating zone to form a connecting channel; the primary heating zone comprises a cylinder body which is sleeved on the circumferential outer wall of the barrel, the inner cavity of the cylinder body forms a heat channel, the heat channel is connected to the connecting channel, and the waste heat generated by the secondary heating zone is dissipated into the heat channel through the connecting channel to provide heat for the primary heating zone.

Preferably, a baffle is provided on the circumferential outer wall of the cylinder, and a plurality of slide grooves are opened on the circumferential outer wall of the baffle.

Preferably, the side wall of the cylinder is provided with a surrounding plate, the side wall of the cylinder is provided with a plurality of ventilation grooves connected to the heat channel, the circumferential inner wall of the cylinder is provided with a plurality of fixing blocks, the ends of the fixing blocks are connected to the side wall of the surrounding plate, and the side wall of the fixing blocks is provided with two arc grooves.

Preferably, the electric heating component includes a fixed cylinder, a baffle is provided on the circumferential outer wall of the fixed cylinder, a plurality of slide grooves 2 and long slide holes corresponding to the slide grooves 1 are opened on the circumferential outer wall of the fixed cylinder, a plurality of heat-conducting blocks corresponding to the fixed blocks are arranged in the inner cavity of the fixed cylinder, a gap is arranged between the circumferential inner wall of the fixed cylinder and the heat-conducting block to form a sliding space; a wave groove is opened on the side wall of the heat-conducting block, a resistance wire is arranged inside the wave groove, and the resistance wire realizes heating through the resistance effect when current flows through it.

Preferably, two arc grooves 2 corresponding to the arc groove 1 are formed on the side wall of the heat conductive block, a heat conductive slide plate is arranged between every two heat conductive blocks, and ring plates are connected at the ends of multiple heat conductive slide plates, and the ring plates are arranged in the sliding space and form a sliding fit. The ring plates slide in the sliding space, driving multiple heat conductive slide plates to slide from the fixed cylinder into the cylinder body.

Preferably, the circumferential outer wall of the ring plate is connected to a transmission plate, the transmission plate passes through the long sliding hole and extends out of the circumferential outer wall of the fixed cylinder, the side wall of the transmission plate is connected to the insulation cylinder, and the circumferential inner wall of the insulation cylinder is provided with a plurality of sliding blocks matching the slide groove one and the slide groove two.

Preferably, a rack is connected to the top of the transmission plate, two fixed side plates are connected to the bottom of the rack, a plurality of rollers are provided on the side walls of the fixed side plates, a support frame is provided below the fixed side plates, and a wheel groove matching the rollers is opened on the top surface of the support frame.

Preferably, the top surface of the table is connected to a fixing frame, a motor is arranged in the fixing frame, a half gear is arranged at the output end of the motor, the output end of the half gear is meshedly connected to the rack, and a plane is arranged on the circumferential outer wall of the half gear.

Preferably, the side wall of the heat-conducting slide is provided with an arc plate, the arc plate forms a sliding fit with the arc groove 1 and the arc groove 2, and the arc plate is a curved surface structure that matches the circumferential outer wall of the barrel and is used to transfer heat to the barrel.

Preferably, one end of the plurality of heat-conducting blocks is connected to a fixing frame 1, and the other end is connected to a fixing frame 2, a side wall of the fixing frame is provided with a tube groove connected to the wave groove, the tube groove is used for arranging the resistance wire, a side wall of the fixing frame 2 is provided with a structure corresponding to the tube groove, a side wall of the fixing frame is connected to a protective plate 1 by bolts, and a side wall of the fixing frame 2 is connected to a protective plate 2 by bolts.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention encloses the area between the primary heating zone and the secondary heating zone by means of an insulating cylinder, so that the primary heating zone and the secondary heating zone form an enclosure structure for the barrel, which can reduce the heat loss of the barrel to the surrounding environment and reduce heat waste. The electric heating component is used to generate relatively concentrated heat to provide the required heat for the secondary heating zone, so that the secondary heating zone can be heated centrally. The waste heat generated in the secondary heating zone is dissipated into the heat channel through the connecting channel to provide heat for the primary heating zone, thereby improving the utilization of the waste heat in the secondary heating zone. After the plastic particles enter the barrel through the feeding port, when they advance to the area of the primary heating zone in the barrel, they are first preheated by the primary heating zone to gradually enter a molten state. When they advance to the area of the secondary heating zone, they are completely melted into a fluid state due to the concentrated heating effect of the secondary heating zone. By fully utilizing the heat, energy consumption is reduced and heating efficiency is improved.

2. The present invention also slides eight heat-conducting slides from the secondary heating zone to the primary heating zone, enters into the cylinder of the primary heating zone and forms a plug-in fit with eight fixed blocks, so that a part of the heat generated by the heating of the resistance wire is transferred to the barrel through the heat-conducting blocks in the secondary heating zone, and the other part of the heat is transferred to the heat channel of the primary heating zone through the eight heat-conducting slides, so as to heat the barrel in the heat channel, and can quickly supply heat to the heat channel of the primary heating zone through the heat-conducting slides, further heat the barrel in all directions, and can quickly increase the temperature of the barrel, thereby improving the heating efficiency. After the temperature of the barrel rises, the heat-conducting slide is reset. At this time, the heat generated by the heating of the resistance wire is transferred to the barrel through the heat-conducting blocks and the heat-conducting slide, so that the secondary heating zone heats the barrel centrally. The barrel is heated centrally and can transfer heat to the entire barrel through itself. At the same time, the waste heat in the secondary heating zone is dissipated into the heat channel through the connecting channel, so as to provide heat for the primary heating zone to continuously supply heat to the barrel, thereby reducing energy consumption and improving heating efficiency.

3. The present invention also drives the half gear to rotate through the operation of the motor, and the half gear drives the rack to move toward the primary heating zone. The rack drives the transmission plate to slide in the long sliding hole, and further drives the insulation tube and the ring plate to move toward the primary heating zone until the transmission plate slides to the end of the long sliding hole. At this time, the tooth mouth of the half gear is separated from the tooth mouth of the rack, and the flat part of the half gear is aligned with the direction of the rack. The half gear and the rack are separated, which avoids heat transfer to the half gear through the rack and reduces heat loss.

4. The present invention also arranges an arc plate on the heat-conducting slide plate. The arc plate has a curved surface structure that matches the outer circumferential wall of the barrel, so that the arc plate can be tightly attached to the outer circumferential wall of the barrel. At the same time, the arc plate is used to increase the contact area with the barrel to promote heat transfer and improve the heating efficiency of the heat-conducting slide plate on the barrel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the main structure of an injection molding machine according to the present invention.

FIG. 2 is a schematic diagram of the barrel structure of the present invention.

FIG3 is a schematic diagram of the overall structure of the present invention.

FIG. 4 is a schematic diagram of the split structure of the primary heating zone and the secondary heating zone of the present invention.

FIG. 5 is a schematic diagram of the first-level heating zone structure from a first viewing angle of the present invention.

FIG. 6 is a schematic diagram of the first-level heating zone structure from a second viewing angle of the present invention.

FIG. 7 is a schematic diagram of the internal structure of the secondary heating zone of the present invention.

FIG8 is a schematic diagram of the disassembled structure of the heat-insulating cylinder and the electric heating assembly of the present invention.

FIG. 9 is a schematic diagram showing a perspective of the split structure of the protective plates at both ends of the electric heating component of the present invention.

FIG. 10 is a schematic diagram showing the second perspective of the split structure of the protective plates at both ends of the electric heating component of the present invention.

FIG. 11 is a schematic diagram of the structure of the fixing tube of the present invention.

FIG. 12 is a schematic diagram of the heat conduction block structure of the present invention.

FIG. 13 is a schematic diagram of the separated structure of the heat conducting block and the resistance wire of the present invention.

FIG. 14 is a schematic diagram showing the internal structure of the heat-insulating cylinder of the present invention from a first viewing angle.

FIG. 15 is a schematic diagram of the internal structure of the heat-insulating cylinder of the present invention from a second perspective.

FIG. 16 is a schematic diagram of the half gear and rack structure of the present invention.

Description of the numbers in the figure:

1. Injection molding machine body; 2. Primary heating zone; 3. Secondary heating zone;

101, table; 102, feeding port; 103, barrel;

201, cylinder; 202, shield; 203, slide groove 1; 204, enclosure; 205, ventilation groove; 206, fixing block; 207, arc groove 1; 208, hot channel;

31. Electric heating component; 3101. Fixed cylinder; 3102. Baffle; 3103. Slide groove 2; 3104. Long slide hole; 3105. Heat conduction block; 3106. Wave groove; 3107. Resistance wire; 3108. Arc groove 2; 3109. Heat conduction slide plate; 3110. Ring plate; 3111. Transmission plate; 3112. Slider; 3113. Fixed frame 1; 3114. Fixed frame 2; 3115. Pipe groove; 3116. Protective plate 1; 3117. Protective plate 2; 3118. Arc plate;

301, heat insulation cylinder; 302, rack; 303, fixed side plate; 304, support frame; 305, roller; 306, half gear; 307, fixed frame; 308, motor.

DETAILED DESCRIPTION

As shown in FIGS. 1 to 16 , the present invention relates to a heating system for injection molding of an injection molding machine, comprising an injection molding machine body 1 , a primary heating zone 2 and a secondary heating zone 3 ;

In an embodiment of the present invention, the injection molding machine body 1 includes a table top 101, a feeding port 102 is arranged above the table top 101, and a barrel 103 is connected to the bottom of the feeding port 102; the primary heating zone 2 and the secondary heating zone 3 are arranged on the circumferential outer wall of the barrel 103; the secondary heating zone 3 includes an electric heating component 31, and the electric heating component 31 is used to provide the required heat for heating the secondary heating zone 3; the secondary heating zone 3 also includes an insulating cylinder 301, and the insulating cylinder 301 is used to enclose the area between the primary heating zone 2 and the secondary heating zone 3 to form a connecting channel; the primary heating zone 2 includes a barrel 201 sleeved on the circumferential outer wall of the barrel 103, and the inner cavity of the barrel 201 forms a heat channel 208, and the heat channel 208 is connected to the connecting channel. The waste heat generated in the secondary heating zone 3 is dissipated into the heat channel 208 through the connecting channel to provide heat for the primary heating zone 2; the present invention uses the insulating cylinder 301 to enclose the area between the primary heating zone 2 and the secondary heating zone 3 The primary heating zone 2 and the secondary heating zone 3 are enclosed to form an enclosure structure for the barrel 103, which can reduce the heat loss of the barrel 103 to the surrounding environment and reduce heat waste. The electric heating component 31 is used to generate relatively concentrated heat to provide the required heat for the secondary heating zone 3, so that the secondary heating zone 3 can be heated centrally. The waste heat generated by the secondary heating zone 3 is dissipated into the heat channel 208 through the connecting channel to provide heat for the primary heating zone 2, thereby improving the utilization of the waste heat of the secondary heating zone 3. After the plastic particles enter the barrel 103 through the feeding port 102, when they advance to the area of the primary heating zone 2 in the barrel 103, they are first preheated by the primary heating zone 2 to gradually enter a molten state. When they advance to the area of the secondary heating zone 3, they are completely melted into a fluid state due to the concentrated heating effect of the secondary heating zone 3. By fully utilizing the heat, energy consumption is reduced and heating efficiency is improved.

In the embodiment of the present invention, a shield plate 202 is provided on the circumferential outer wall of the cylinder 201, and a plurality of slide grooves 203 are provided on the circumferential outer wall of the shield plate 202; a side wall of the cylinder 201 is provided with a panel 204, and a plurality of ventilation grooves 205 connected to the heat channel 208 are provided on the side wall of the cylinder 201, and the ventilation grooves 205 can exhaust the heat channel 208, and eight fixing blocks 206 are provided on the circumferential inner wall of the cylinder 201, and the ends of the fixing blocks 206 are connected to the panel 204. 04 side wall is connected, the side wall of the fixed block 206 is provided with two arc grooves 207; the electric heating component 31 includes a fixed cylinder 3101, the outer wall of the fixed cylinder 3101 is provided with a baffle 3102, the outer wall of the fixed cylinder 3101 is provided with a plurality of slide grooves 2 3103 and long slide holes 3104 corresponding to the slide groove 203, the inner cavity of the fixed cylinder 3101 is provided with a plurality of heat conducting blocks 3105 corresponding to the fixed block 206, the fixed cylinder 3101 is provided with a plurality of heat conducting blocks 3105 corresponding to the fixed block 206, and the outer wall of the fixed cylinder 3101 is provided with a plurality of heat conducting blocks 3105 corresponding to the fixed block 206. A gap is provided between the inner wall and the heat-conducting block 3105 to form a sliding space; a wave groove 3106 is provided on the side wall of the heat-conducting block 3105, and a resistance wire 3107 is provided inside the wave groove 3106. The resistance wire 3107 is connected to an external power supply so that the resistance wire 3107 is heated by the resistance effect when current flows through the resistance wire 3107. The heating method of the resistance wire 3107 is the existing technology in the example and is not described in detail in the present invention; two arc grooves 2 3108 corresponding to the arc groove 1 207 are provided on the side wall of the heat-conducting block 3105, and a heat-conducting slide plate 3109 is provided between every two heat-conducting blocks 3105. There are eight heat-conducting slide plates 3109, and the ends of the eight heat-conducting slide plates 3109 are connected with ring plates 3110. The ring plates 3110 are arranged in the sliding space and form a sliding fit. The ring plates 3110 slide in the sliding space to drive multiple heat-conducting slide plates 3109 to slide from the fixed cylinder 3101 to the cylinder body 201.

In the embodiment of the present invention, the circumferential outer wall of the ring plate 3110 is connected to a transmission plate 3111, the transmission plate 3111 penetrates the long sliding hole 3104 and extends out of the circumferential outer wall of the fixed cylinder 3101, the side wall of the transmission plate 3111 is connected to the insulation cylinder 301, and the circumferential inner wall of the insulation cylinder 301 is provided with a plurality of sliders 3112 matching the slide groove 1 203 and the slide groove 2 3103; the top of the transmission plate 3111 is connected to a rack 302, the bottom of the rack 302 is connected to two fixed side plates 303, the side walls of the fixed side plates 303 are provided with a plurality of rollers 305, a support frame 304 is provided below the fixed side plate 303, the top surface of the support frame 304 is provided with a wheel groove matching the roller 305, and the movement of the rack 302 is facilitated by the cooperation of the plurality of rollers 305 and the wheel groove, and the top surface of the table 101 is connected to a fixed frame 307, and the inner surface of the fixed frame 307 A motor 308 is provided, and a half gear 306 is provided at the output end of the motor 308. The output end of the half gear 306 is meshed and connected to the rack 302, and a plane is provided on the circumferential outer wall of the half gear 306. The present invention drives the half gear 306 to rotate through the operation of the motor 308, and the half gear 306 drives the rack 302 to move toward the primary heating zone 2. The rack 302 drives the transmission plate 3111 to slide in the long sliding hole 3104, and further drives the insulation cylinder 301 and the ring plate 3110 to move toward the primary heating zone 2 until the transmission plate 3111 slides to the end of the long sliding hole 3104. At this time, the tooth mouth of the half gear 306 is separated from the tooth mouth of the rack 302, and the plane part of the half gear 306 is aligned with the direction of the rack 302. The half gear 306 and the rack 302 form a separation state, thereby preventing heat from being transferred to the half gear 306 through the rack 302.

When the ring plate 3110 slides toward the primary heating zone 2, the eight heat-conducting slide plates 3109 are driven to slide onto the inner circumferential wall of the barrel 201, and are plugged into the eight fixing blocks 206. At this time, part of the heat generated by the resistance wire 3107 is transferred to the barrel 103 through the heat-conducting block 3105, and the other part of the heat is transferred to the heat channel 208 of the primary heating zone 2 through the eight heat-conducting slide plates 3109, thereby heating the barrel 103 in the heat channel 208. In the heat channel 208 of the hot zone 2, heat can be quickly supplied to the heat channel 208 of the primary heating zone 2, and the barrel 103 can be heated respectively, so that the temperature of the barrel 103 can be quickly increased, thereby improving the heating efficiency. When the temperature of the barrel 103 rises, the motor 308 rotates in the opposite direction to reset the heat-conducting slide plate 3109. At this time, the heat generated by the heating of the resistance wire 3107 is transferred to the barrel 103 through the heat-conducting block 3105 and the heat-conducting slide plate 3109 for centralized heating, thereby further improving the heating effect of the secondary heating zone 3.

As another embodiment of the present invention, an arc plate 3118 is provided on the side wall of the heat-conducting slide plate 3109. The arc plate 3118 forms a sliding fit with the arc groove 1 207 and the arc groove 2 3108. The arc plate 3118 is a curved surface structure that matches the outer wall of the circumference of the barrel 103 and is used to transfer heat to the barrel 103. By arranging the arc plate 3118 on the heat-conducting slide plate 3109, the arc plate 3118 is used to increase the contact area with the barrel 103 to promote heat transfer, thereby improving the heating efficiency of the heat-conducting slide plate 3109 on the barrel 103.

As another embodiment of the present invention, one end of the plurality of heat-conducting blocks 3105 is connected to a fixing frame 1 3113, and the other end is connected to a fixing frame 2 3114. A tube groove 3115 connected to the wave groove 3106 is provided on the side wall of the fixing frame 1 3113. The tube groove 3115 is used for arranging the route of the resistance wire 3107. The side wall of the fixing frame 2 3114 is provided with a structure corresponding to the tube groove 3115. The side wall of the fixing frame 1 3113 is connected to a protective plate 1 3116 by bolts, and the side wall of the fixing frame 2 3114 is connected to a protective plate 2 3117 by bolts. The corresponding tube groove 3115 can be enclosed and shielded by the protective plate 1 3116 and the protective plate 2 3117 to prevent the internal heat from dissipating to the surrounding environment and reduce heat loss.

Working principle: This embodiment provides a heating system for injection molding of an injection molding machine. When in use, the barrel 103 is first heated, and the motor 308 drives the half gear 306 to rotate, and the half gear 306 drives the rack 302 to move toward the primary heating zone 2. The rack 302 drives the transmission plate 3111 to slide in the long slide hole 3104, and further drives the heat insulation barrel 301 and the ring plate 3110 to move toward the primary heating zone 2 until the transmission plate 3111 slides to the end of the long slide hole 3104. When the tooth opening of the half gear 306 is disengaged from the tooth opening of the rack 302, the flat part of the half gear 306 is aligned with the direction of the rack 302, and the half gear 306 and the rack 302 are separated, thereby preventing heat from being transferred to the half gear 306 through the rack 302. When the ring plate 3110 slides toward the primary heating zone 2, it drives the eight heat-conducting slide plates 3109 to slide onto the inner wall of the circumference of the cylinder 201, and forms a plug-in fit with the eight fixed blocks 206. At this time, part of the heat generated by the heating of the resistance wire 3107 is transferred to the barrel 103 through the heat-conducting block 3105, and the other part of the heat is transferred to the heat channel 208 of the primary heating zone 2 through the eight heat-conducting slide plates 3109, thereby heating the barrel 103 in the heat channel 208. By heating the barrel 103 respectively through the secondary heating zone 3 and the primary heating zone 2, the temperature of the barrel 103 can be quickly increased, thereby improving the heating efficiency. When the temperature of the barrel 103 rises, the motor 308 rotates in the opposite direction to reset the heat-conducting slide plate 3109. At this time, the heat generated by the heating of the resistance wire 3107 is transferred to the barrel 103 through the heat-conducting block 3105 and the heat-conducting slide plate 3109, so that the secondary heating zone 3 performs centralized heating on the barrel 103. The barrel 103 is centrally heated and can transfer heat to the entire barrel 103 through itself. At the same time, the waste heat of the secondary heating zone 3 is dissipated into the heat channel 208 through the connecting channel, providing heat for the primary heating zone 2 to continuously heat the barrel 103.

The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims (10)

1. The heating system for injection molding of the injection molding machine is characterized by comprising an injection molding machine main body (1), a primary heating zone (2) and a secondary heating zone (3);

The injection molding machine comprises an injection molding machine main body (1) and a feeding device, wherein the injection molding machine main body (1) comprises a table top (101), a feeding opening (102) is arranged above the table top (101), and a charging barrel (103) is connected to the bottom of the feeding opening (102);

The primary heating zone (2) and the secondary heating zone (3) are arranged on the circumferential outer wall of the charging barrel (103);

The secondary heating zone (3) comprises an electrothermal assembly (31), the electrothermal assembly (31) being used for providing the required heat for the heating of the secondary heating zone (3);

The secondary heating zone (3) further comprises a heat insulation cylinder (301), and the heat insulation cylinder (301) is used for enclosing the area between the primary heating zone (2) and the secondary heating zone (3) to form a connecting channel;

The primary heating zone (2) comprises a barrel body (201) sleeved on the circumferential outer wall of the charging barrel (103), a heat channel (208) is formed in the inner cavity of the barrel body (201), the heat channel (208) is communicated with the connecting channel, and waste heat generated by the secondary heating zone (3) is emitted into the heat channel (208) through the connecting channel to provide heat for the primary heating zone (2).

2. The heating system for injection molding of an injection molding machine according to claim 1, wherein a shielding plate (202) is provided on a circumferential outer wall of the cylinder (201), and a plurality of sliding grooves (203) are provided on the circumferential outer wall of the shielding plate (202).

3. The heating system for injection molding of an injection molding machine according to claim 2, wherein a shroud plate (204) is provided on a side wall of the barrel body (201), a plurality of ventilation grooves (205) communicated with the thermal channel (208) are provided on a side wall of the barrel body (201), a plurality of fixing blocks (206) are provided on a circumferential inner wall of the barrel body (201), ends of the fixing blocks (206) are connected with a side wall of the shroud plate (204), and two arc grooves I (207) are provided on a side wall of the fixing blocks (206).

4. A heating system for injection molding of an injection molding machine according to claim 3, wherein the electric heating assembly (31) comprises a fixed cylinder (3101), a baffle (3102) is arranged on the circumferential outer wall of the fixed cylinder (3101), a plurality of sliding grooves (3103) and strip sliding holes (3104) corresponding to the sliding grooves (203) are formed on the circumferential outer wall of the fixed cylinder (3101), a plurality of heat conducting blocks (3105) corresponding to the fixed blocks (206) are arranged in the inner cavity of the fixed cylinder (3101), and gaps are formed between the circumferential inner wall of the fixed cylinder (3101) and the heat conducting blocks (3105) to form sliding spaces;

Wave grooves (3106) are formed in the side walls of the heat conducting blocks (3105), resistance wires (3107) are arranged in the wave grooves (3106), and the resistance wires (3107) achieve heating through the resistance effect when current flows.

5. The heating system for injection molding of an injection molding machine according to claim 4, wherein two arc grooves (3108) corresponding to the first arc grooves (207) are formed in the side wall of the heat conducting block (3105), a heat conducting sliding plate (3109) is arranged between each two heat conducting blocks (3105), ring plates (3110) are connected to the ends of the heat conducting sliding plates (3109), the ring plates (3110) are arranged in the sliding space and form sliding fit, and the ring plates (3110) slide in the sliding space to drive the heat conducting sliding plates (3109) to slide into the cylinder body (201) from the fixed cylinder (3101).

6. The heating system for injection molding of an injection molding machine according to claim 5, wherein a transmission plate (3111) is connected to a circumferential outer wall of the ring plate (3110), the transmission plate (3111) penetrates through the elongated sliding hole (3104) and extends out of the circumferential outer wall of the fixed cylinder (3101), a side wall of the transmission plate (3111) is connected to the heat insulation cylinder (301), and a plurality of sliding blocks (3112) matched with the first sliding groove (203) and the second sliding groove (3103) are arranged on a circumferential inner wall of the heat insulation cylinder (301).

7. The heating system for injection molding of an injection molding machine according to claim 6, wherein a rack (302) is connected to the top of the transmission plate (3111), two fixed side plates (303) are connected to the bottom of the rack (302), a plurality of rollers (305) are arranged on the side walls of the fixed side plates (303), a supporting frame (304) is arranged below the fixed side plates (303), and a wheel groove matched with the rollers (305) is formed in the top surface of the supporting frame (304).

8. The heating system for injection molding of an injection molding machine according to claim 7, wherein a fixing frame (307) is connected to the top surface of the table top (101), a motor (308) is arranged in the fixing frame (307), a half gear (306) is arranged at the output end of the motor (308), the output end of the half gear (306) is in meshed connection with the rack (302), and a plane is arranged on the circumferential outer wall of the half gear (306).

9. The heating system for injection molding of an injection molding machine according to claim 8, wherein an arc plate (3118) is disposed on a side wall of the heat conducting sliding plate (3109), the arc plate (3118) forms a sliding fit with the first arc groove (207) and the second arc groove (3108), and the arc plate (3118) is a curved surface structure matching with a circumferential outer wall of the cylinder (103) and is used for transferring heat to the cylinder (103).

10. The heating system for injection molding of an injection molding machine according to claim 9, wherein one end of the plurality of heat conducting blocks (3105) is connected with a first fixed frame (3113), the other end is connected with a second fixed frame (3114), a pipe groove (3115) communicated with the wave groove (3106) is formed in the side wall of the first fixed frame (3113), the pipe groove (3115) is used for the arrangement route of the resistance wires (3107), a structure corresponding to the pipe groove (3115) is formed in the side wall of the second fixed frame (3114), a protection plate (3116) is connected to the side wall of the first fixed frame (3113) through bolts, and a second protection plate (3117) is connected to the side wall of the second fixed frame (3114) through bolts.