A plastic part injection molding auxiliary unit and injection molding device

Abstract

This application provides a plastic injection molding auxiliary unit and injection molding device, specifically relating to the field of plastic injection molding machine technology. It includes a composite processing mechanism that covers and sleeves the outer wall of the feeding barrel. The composite processing mechanism is a two-part quick-release structure, integrating a segmented heat treatment component and a feeding unblocking component. This plastic injection molding auxiliary unit and injection molding device, through the two-part quick-release composite processing mechanism with its segmented heat treatment component and feeding unblocking component, covers and sleeves the outer wall of the injection molding machine's feeding barrel. This solves the inherent defects of existing injection molding machine barrel heating structure modification costs, poor heating uniformity, serious heat loss, and easy bridging and blockage in the feeding section. It eliminates the need to modify the original barrel, and through rapid installation, segmented uniform heating, and efficient heat retention and energy saving, simultaneously completes anti-bridging and unblocking in the feeding section, significantly improving the stability of the injection molding process and the equipment's universal adaptability.

Description

Technical Field

[0001] This application belongs to the field of injection molding technology, and provides an auxiliary unit for injection molding of plastic parts and an injection molding device. Background Technology

[0002] Injection molding of plastic parts is one of the core processes in industrial product manufacturing. The heating system of the injection molding machine barrel directly determines the quality of raw material plasticization, the precision of product molding, and the energy consumption of equipment operation. As the injection molding industry continues to increase its requirements for product consistency, energy saving and consumption reduction, and cost control of equipment modification, the existing conventional barrel heating system is finding it difficult to meet the multi-dimensional usage needs of on-site production.

[0003] Existing publicly available technologies related to injection molding machine barrel heating, such as the electromagnetic heating system disclosed in CN101462348B and the vacuum insulation device disclosed in CN202421536506U, are mostly single heating structures or separate insulation and heating devices. They require structural modifications to the original barrel, resulting in high modification costs and poor universality and adaptability. Furthermore, they generally suffer from insufficient heating uniformity, serious heat loss, and high energy consumption. They also lack suitable anti-bridging and drainage structures, which can easily lead to raw material blockage and unstable plasticization. They cannot simultaneously meet the requirements of no modification or installation, efficient and uniform heating, and stable anti-bridging. Summary of the Invention

[0004] In view of the deficiencies of the existing technology, this application provides a plastic injection molding auxiliary unit and injection molding device, which can effectively solve the related technical problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] This application discloses a plastic injection molding auxiliary unit and injection molding device, including a composite processing mechanism that covers and is sleeved on the outer wall of the feed cylinder;

[0007] The composite processing mechanism is a two-half split quick-assembly structure, and the composite processing mechanism integrates a segmented heat treatment component and a feeding and unblocking component.

[0008] The segmented heat treatment assembly has a covered structure, with a vacuum insulation layer, an isolation layer, a heating layer and a heat-conducting layer stacked in a radial direction from the outside to the inside, centered on the axis of the feed cylinder.

[0009] The heating layer is equipped with an external terminal extending to the outside of the vacuum insulation layer.

[0010] The inner wall of the heat-conducting layer is in close contact with the outer wall of the feeding cylinder;

[0011] The feeding and unblocking assembly is arranged corresponding to the feeding section of the feeding cylinder. The feeding and unblocking assembly includes a semi-annular base and a piezoelectric vibrating plate.

[0012] The semi-annular base is attached and fixed to the outer wall of the vacuum insulation layer of the segmented heat treatment assembly, and the piezoelectric vibrating plate is fixedly installed on the semi-annular base.

[0013] A further option is that, after the two halves of the composite processing mechanism are closed, they are fastened to the outer wall of the feeding cylinder by a clamp structure.

[0014] A further option is that the segmented heat treatment component is divided into three sections along the axial direction of the feeding cylinder: a feeding section, a compression section, and a homogenization section. The heating layers corresponding to the three sections are set independently and can achieve independent temperature control.

[0015] A further option is that the heating structures of the three heating layers correspond to the feeding section, the compression section, and the homogenization section, respectively;

[0016] The heating layer of the feeding section is a PTC constant temperature heating structure, the heating layer of the compression section is an electromagnetic induction heating structure, and the heating layer of the homogenization section is a graphene surface heating structure.

[0017] A further option is that the feeding and unblocking components are symmetrically arranged on the outer walls of the two halves of the composite processing mechanism, and the semi-annular base is set without penetrating the vacuum insulation layer.

[0018] A further solution is that the plastic part injection molding auxiliary unit also includes a linkage control unit;

[0019] The linkage control unit is electrically connected to the external terminals of the heating layer, the piezoelectric vibrator, and the screw drive module of the injection molding machine, respectively, and is used to adaptively adjust the heating power of the heating layer and the vibration frequency and amplitude of the piezoelectric vibrator according to the screw speed.

[0020] A further embodiment is that the vacuum insulation layer is an integral structure that runs through three axial sections, with annular heat insulation rings provided between adjacent feeding sections and compression sections, and between compression sections and homogenization sections.

[0021] A further option is that the heat-conducting layer is a highly thermally conductive flexible bonding pad, used to compensate for assembly gaps and ensure close contact and uniform heat transfer between the heat-conducting layer and the outer wall of the feed cylinder.

[0022] A further option is that the heat-conducting layer is a highly thermally conductive flexible bonding pad, used to compensate for assembly gaps and ensure close contact and uniform heat transfer between the heat-conducting layer and the outer wall of the feed cylinder.

[0023] In addition, an injection molding apparatus employs the aforementioned plastic part injection molding auxiliary unit, wherein the plastic part injection molding auxiliary unit is covered and sleeved on the outer wall of the feeding cylinder;

[0024] The injection molding apparatus includes a main unit, on which a material feeding injection unit and a mold unit are provided, and the material feeding injection unit is equipped with a material feeding cylinder.

[0025] In summary, the technical solution provided in this application has at least one of the following advantages compared with the prior art:

[0026] This plastic injection molding auxiliary unit and injection molding device uses a two-part split quick-installation composite treatment mechanism with segmented heat treatment components and feeding unblocking components. It covers and sleeves the outer wall of the injection molding machine's feeding barrel, solving the inherent defects of existing injection molding machine barrel heating structure modification such as high cost, poor heating uniformity, serious heat loss, and easy bridging and blockage in the feeding section. It does not require modification of the original barrel. Through quick installation, segmented uniform heating, and efficient heat locking and energy saving, it simultaneously completes the anti-bridging and unblocking of the feeding section, greatly improving the stability of the injection molding process and the equipment's universal adaptability.

[0027] The three independent heating layers arranged along the barrel axis, together with the annular heat insulation rings between the sections, can adjust the heating temperature of the feeding section, compression section and homogenization section according to different requirements of the injection molding process. At the same time, it effectively avoids the problem of temperature cross-contamination between adjacent temperature zones, greatly improves the temperature control effect of each section of the barrel, can better match the melting and plasticizing requirements of different injection molding raw materials, reduce the situation of raw material overheating and degradation or insufficient melting, and improve the molding quality of injection molded products.

[0028] Meanwhile, different heating structures are matched to the process requirements of different sections of the barrel. The feeding section uses a self-limiting PTC heating structure to prevent the raw material from melting and arching in advance. The compression section uses electromagnetic induction heating to achieve rapid heating and plasticization. The homogenization section uses graphene surface heating to ensure uniform temperature field. Compared with the shortcomings of the existing technology where a single heating structure cannot adapt to the process requirements of the whole section, it also takes into account the anti-bridging effect, raw material plasticization efficiency and melt forming stability.

[0029] The linkage control unit can adaptively adjust the heating power of each heating layer and the vibration parameters of the piezoelectric vibrator according to the real-time speed of the injection molding machine screw, so that the heating efficiency, the guiding effect and the material conveying speed are matched in real time. This can not only avoid the problems of insufficient material melting and bridging when the screw speed changes, but also reduce unnecessary energy waste. Attached Figure Description

[0030] Figure 1 This is a front-view stereoscopic structural diagram of this application;

[0031] Figure 2 This is a partial three-dimensional structural diagram of the relevant components of the composite processing mechanism in this application;

[0032] Figure 3 This is a partial top view of the relevant components of the composite processing mechanism in this application;

[0033] Figure 4 For this application Figure 3 A magnified view of a section at point A in the middle;

[0034] Figure 5 This is a partial three-dimensional structural diagram of the relevant components of the composite processing mechanism in this application;

[0035] Figure 6 This is a partial three-dimensional structural diagram of the relevant components of the composite processing mechanism in the separated state in this application;

[0036] Figure 7 This is a partially exploded three-dimensional structural view of the relevant components at the segmented heat treatment assembly in this application;

[0037] Figure 8 This is a partial front view of the relevant components at the segmented heat treatment assembly in this application;

[0038] Figure 9 This is a partial three-dimensional structural diagram of the relevant components of the feeding and unblocking assembly in this application.

[0039] The labels in the diagram represent:

[0040] 1. Main unit; 11. Material feeding injection unit; 12. Mold unit; 13. Material feeding cylinder;

[0041] 2. Composite processing mechanism;

[0042] 21. Segmented heat treatment assembly; 211. Vacuum insulation layer; 212. Insulation layer; 213. Heating layer; 2131. External terminal; 214. Thermally conductive layer;

[0043] 22. Feeding and unblocking assembly; 221. Semi-circular base; 222. Piezoelectric vibrating plate. Detailed Implementation

[0044] The present application will be further described below with reference to embodiments.

[0045] First Embodiment

[0046] refer to Figures 1 to 9 As shown, this embodiment discloses a plastic injection molding auxiliary unit for use with the feed cylinder 13 of an injection molding machine. The core structure is a composite processing mechanism 2 that covers and is sleeved on the outer wall of the feed cylinder 13.

[0047] Specifically, the composite processing mechanism 2 is a two-half split quick-assembly structure, consisting of a symmetrically arranged left half covering shell and a right half covering shell. The composite processing mechanism 2 integrates a segmented heat treatment component 21 and a feeding and unblocking component 22. Each layer of the segmented heat treatment component 21 is integrally fixed with the two-half covering shell. After the left and right half covering shells are closed, the corresponding layers are spliced ​​together to form a complete annular covering structure.

[0048] The segmented heat treatment assembly 21 has a covered structure, with a vacuum insulation layer 211, an isolation layer 212, a heating layer 213 and a heat-conducting layer 214 stacked radially from the outside to the inside, centered on the axis of the feed cylinder 13.

[0049] Specifically, the vacuum insulation layer 211 is a closed sandwich structure formed by vacuuming a double-layer stainless steel shell. A getter and an infrared reflective film can be added inside the sandwich to further improve the heat insulation and heat-locking effect. The isolation layer 212 is formed by pressing high-temperature resistant mica insulating board and completely covers the outer periphery of the heating layer 213 to avoid the risk of leakage between the heating layer 213 and the outer structure.

[0050] Furthermore, the heating layer 213 is equipped with an external terminal 2131 extending to the outside of the vacuum insulation layer 211; the external terminal 2131 is a high-temperature resistant sealed terminal, which passes through the reserved through hole of the vacuum insulation layer 211, and the through hole and the terminal are filled and sealed with high-temperature resistant sealant to avoid the problem of air leakage failure of the vacuum insulation layer 211.

[0051] The inner wall of the heat-conducting layer 214 is tightly fitted to the outer wall of the feeding cylinder 13. The heat-conducting layer 214 is a highly thermally conductive flexible bonding pad used to compensate for assembly gaps and ensure that the heat-conducting layer 214 is tightly fitted to the outer wall of the feeding cylinder 13 and that heat transfer is uniform. The heat-conducting layer 214 uses a highly thermally conductive graphite flexible pad, which is fitted to the inner wall of the heating layer 213. After the left and right halves of the shell are closed, the joint of the heat-conducting layer 214 adopts a stepped overlapping structure to avoid gaps at the joint that could lead to uneven heat transfer.

[0052] In another specific embodiment, the feeding and unblocking component 22 is arranged corresponding to the feeding section of the feeding cylinder 13. The feeding and unblocking component 22 includes a semi-annular base 221 and a piezoelectric vibrating plate 222. The semi-annular base 221 is attached and fixed to the outer wall of the vacuum insulation layer 211 of the segmented heat treatment component 21, and the piezoelectric vibrating plate 222 is fixedly installed on the semi-annular base 221.

[0053] Specifically, the feeding and unblocking components 22 are symmetrically arranged on the outer walls of the two halves of the composite processing mechanism 2. The semi-annular base 221 is made of aluminum alloy and perfectly matches the curvature of the outer walls of the left and right halves of the shell. It is fixed by high-temperature resistant structural adhesive or by countersunk bolts to the outer wall of the vacuum insulation layer 211 without damaging the sealed structure of the vacuum insulation layer 211. A high-temperature resistant buffer pad is provided between the semi-annular base 221 and the outer wall of the segmented heat treatment component 21. The high-temperature resistant buffer pad is made of high-temperature resistant silicone gasket and is attached to the inner side of the semi-annular base 221. This can improve the uniformity of vibration transmission, avoid shell wear caused by vibration, and block the transmission of vibration to the non-feeding section area. The piezoelectric vibrator 222 is made of high-temperature resistant piezoelectric ceramic sheet. Its working temperature can cover the conventional working temperature range of the injection molding machine barrel. It is fixed to the outer surface of the semi-annular base 221 by conductive adhesive. The wiring terminal is connected to the external control circuit through a high-temperature resistant wire.

[0054] Specifically, after the two halves of the composite processing mechanism 2 are closed, they are fastened to the outer wall of the feeding cylinder 13 by a clamp structure. After the two halves of the composite processing mechanism 2 are closed, at least two sets of annular clamp structures are axially spaced around the outer periphery of the composite processing mechanism 2. The clamp structures are locked by bolts to achieve a tight covering of the two halves of the structure. The disassembly and assembly process does not require any modification to the feeding cylinder 13 and can be directly adapted to the cylinder specifications of existing conventional injection molding machines.

[0055] In addition, the segmented heat treatment component 21 is divided into three sections along the axial direction of the feed cylinder 13: a feeding section, a compression section, and a homogenization section. The heating layers 213 corresponding to the three sections are set independently and can achieve independent temperature control. The vacuum insulation layer 211 is an integral structure that runs through the three sections. Annular heat insulation rings are set between adjacent feeding sections and compression sections, and between compression sections and homogenization sections. The annular heat insulation rings set between adjacent sections are made of high-temperature resistant ceramic heat insulation material and are embedded inside the vacuum insulation layer 211 to block axial heat conduction between the three heating layers 213, thus avoiding the problem of temperature cross-contamination between adjacent temperature zones leading to a decrease in temperature control accuracy.

[0056] A high-temperature resistant buffer pad is provided between the semi-annular base 221 and the outer wall of the segmented heat treatment component 21. A protective cover covering the piezoelectric vibrating plate 222 is provided on the outside of the semi-annular base 221. The protective cover is an arc-shaped cover formed by stamping thin metal sheet and is fixed to the semi-annular base 221 by a snap-fit ​​structure, completely covering the outer periphery of the piezoelectric vibrating plate 222, preventing workshop dust and oil from entering and causing the vibrating plate to fail, while also reducing the noise generated by vibration.

[0057] Second Embodiment

[0058] This embodiment is a detailed implementation of the linkage control logic based on the first embodiment. The plastic injection molding auxiliary unit in this embodiment also includes a linkage control unit.

[0059] The linkage control unit is electrically connected to the external terminal 2131 of the heating layer 213, the piezoelectric vibrator 222, and the screw drive module of the injection molding machine, respectively, and is used to adaptively adjust the heating power of the heating layer 213 and the vibration frequency and amplitude of the piezoelectric vibrator 222 according to the screw speed.

[0060] The linkage control unit is implemented using an expansion module of the original PLC controller of the injection molding machine, or an independent single-chip microcomputer control module, without requiring significant modifications to the original control system of the injection molding machine. The signal input terminals of the linkage control unit are electrically connected to the speed sensor of the screw drive module of the injection molding machine and the temperature sensors set in each section of the feed cylinder 13, respectively. The signal output terminals are electrically connected to the external terminal 2131 of the heating layer 213 and the drive circuit of the piezoelectric vibrator 222, respectively. Specifically, the drive circuit of the piezoelectric vibrator adopts a conventional piezoelectric ceramic drive amplifier circuit, which can receive the PWM adjustment signal output by the linkage control unit and adjust the vibration frequency and amplitude of the piezoelectric vibrator accordingly.

[0061] The core control logic of the linkage control unit is as follows: Real-time speed signals of the injection molding machine screw are collected by a speed sensor. When the screw speed increases, the heating power of the corresponding heating layer 213 is increased simultaneously, and the vibration frequency and amplitude of the piezoelectric vibrator 222 are also increased to match the increased material conveying speed, preventing insufficient material melting and bridging in the feeding section. When the screw speed decreases, the heating power and vibration parameters are reduced simultaneously to prevent overheating and degradation of the material and energy waste. The linkage control unit can also be connected to the injection pressure signal and back pressure signal of the injection molding machine to achieve multi-parameter coordinated closed-loop control, further improving the stability of the injection molding process.

[0062] Third Embodiment

[0063] This embodiment is a detailed implementation based on the first embodiment, focusing on the segmented differentiated heating structure. In this embodiment, the segmented heat treatment component 21 is divided into three segments along the axial direction of the feeding cylinder 13: a feeding segment, a compression segment, and a homogenization segment. The heating structures of the three heating layers 213 correspond to the feeding segment, the compression segment, and the homogenization segment, respectively. Among them, the heating layer 213 of the feeding segment is a PTC constant temperature heating structure, the heating layer 213 of the compression segment is an electromagnetic induction heating structure, and the heating layer 213 of the homogenization segment is a graphene surface heating structure.

[0064] The three heating layers 213 are independently encapsulated on the left and right halves of the housing. Each heating layer 213 is equipped with an independent temperature detection element and an external terminal 2131, which can realize independent closed-loop temperature control.

[0065] Specifically, the heating layer 213 of the feeding section is formed by splicing multiple sets of arc-shaped PTC heating modules. The Curie temperature of the PTC heating modules matches the process temperature requirements of the feeding section, which can achieve self-limiting constant temperature heating without the need for additional over-temperature protection circuits. This avoids the raw materials from melting and arching prematurely due to excessively high temperature in the feeding section, thereby reducing the risk of bridging and blockage from the source.

[0066] The heating layer 213 of the compression section uses a high-frequency electromagnetic induction coil. The coil is wound around the insulating frame along the circumference of the semi-enclosed shell. A magnetic shielding layer is provided on the outside of the coil. The magnetic shielding layer is formed by splicing ferrite magnetic sheets and is attached to the outside of the coil. It can constrain the magnetic lines of force to concentrate inward and act on the feeding cylinder, avoid the leakage of magnetic lines of force and the resulting increase in energy consumption, and at the same time avoid interference with surrounding electrical components. Electromagnetic induction heating can directly cause the metal cylinder of the feeding cylinder 13 to generate eddy current heating. It has strong heat penetration and fast heating speed, which matches the process requirements of the compression section where the raw materials need to be quickly compacted and melted.

[0067] The heating layer 213 of the homogenization section uses a flexible graphene heating film, which is completely attached to the inner wall of the homogenization section cavity. This enables uniform heating across the entire surface, eliminating local hot spots and dead zones, and minimizing temperature fluctuations. This ensures the viscosity uniformity of the molten raw material and eliminates defects such as internal stress, color difference, and flow marks in the injection molded product, matching the isothermal homogenization process requirements of the homogenization section. The heating structure of the three heating layers 213 can be flexibly replaced according to the type of injection molding raw material and the requirements of the molding process. For example, the homogenization section can also use a PTC isothermal heating structure, and the compression section can also use a graphene surface heating structure, all of which fall within the protection scope of this application.

[0068] The complete working principle of the plastic part injection molding auxiliary unit and injection molding device in the above embodiments is as follows:

[0069] First, open the two halves of the composite processing mechanism 2 and fit them onto the outer wall of the feed cylinder 13 of the existing injection molding machine. After closing them, secure them with a clamp structure to complete the installation. No structural modifications to the feed cylinder 13 are required.

[0070] After installation, power is supplied to the three heating layers 213, and the heat is evenly conducted to the feeding cylinder 13 through the heat conduction layer 214 to achieve segmented independent temperature control heating. The outermost vacuum insulation layer 211 blocks the heat from being lost to the outside, reduces energy consumption, and avoids safety hazards caused by excessive temperature on the outer wall of the equipment.

[0071] During the operation of the injection molding machine, the linkage control unit collects the screw speed signal in real time and adaptively adjusts the heating power of each heating layer and the vibration parameters of the piezoelectric vibrator. When the screw speed increases, the heating power and vibration intensity are increased simultaneously to ensure that the raw material melts fully and to avoid bridging and blockage in the feeding section. When the screw speed decreases, the heating power and vibration intensity are reduced simultaneously to prevent the raw material from overheating and degrading and to reduce energy consumption.

[0072] The feeding and unblocking component 22 in the feeding section uses micro-vibration generated by the piezoelectric vibrating plate 222 to be transmitted through the shell to the feeding cylinder 13, breaking up the raw material clumps in the feeding section, preventing the raw material from arching and bridging, and ensuring the stability of the raw material conveying.

[0073] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A plastic injection molding auxiliary unit, used in conjunction with the feed cylinder (13) of an injection molding machine, characterized in that: include: A composite processing mechanism (2) that is wrapped around the outer wall of the feed cylinder (13); The composite processing mechanism (2) is a two-half split quick-assembly structure. The composite processing mechanism (2) integrates a segmented heat treatment component (21) and a feeding and unblocking component (22). The segmented heat treatment component (21) has a covered structure, with a vacuum insulation layer (211), an isolation layer (212), a heating layer (213) and a heat-conducting layer (214) stacked in the radial direction from the outside to the inside, centered on the axis of the feed cylinder (13). The heating layer (213) is equipped with an external terminal (2131) extending to the outside of the vacuum insulation layer (211). The inner wall of the heat-conducting layer (214) is in close contact with the outer wall of the feeding cylinder (13); The feeding and unblocking assembly (22) is arranged in the feeding section of the feeding cylinder (13). The feeding and unblocking assembly (22) includes a semi-annular base (221) and a piezoelectric vibrating plate (222). The semi-annular base (221) is attached to and fixed to the outer wall of the vacuum insulation layer (211) of the segmented heat treatment assembly (21), and the piezoelectric vibrating plate (222) is fixedly installed on the semi-annular base (221).

2. The plastic part injection molding auxiliary unit according to claim 1, characterized in that, After the two halves of the composite processing mechanism (2) are closed, they are fastened to the outer wall of the feeding cylinder (13) by a clamp structure.

3. The plastic part injection molding auxiliary unit according to claim 1, characterized in that, The segmented heat treatment component (21) is divided into three sections along the axial direction of the feed cylinder (13): feeding section, compression section and homogenization section. The heating layers (213) corresponding to the three sections are set independently and can achieve independent temperature control.

4. The plastic part injection molding auxiliary unit according to claim 3, characterized in that, The heating structures of the three heating layers (213) correspond to the feeding section, the compression section, and the homogenization section, respectively; Among them, the heating layer (213) of the feeding section is a PTC constant temperature heating structure, the heating layer (213) of the compression section is an electromagnetic induction heating structure, and the heating layer (213) of the homogenization section is a graphene surface heating structure.

5. The plastic part injection molding auxiliary unit according to claim 1, characterized in that, The feeding and unblocking components (22) are symmetrically arranged on the outer walls of the two halves of the composite processing mechanism (2), and the semi-annular base (221) is set without penetrating the vacuum insulation layer (211).

6. The plastic part injection molding auxiliary unit according to claim 1, characterized in that, It also includes a linkage control unit; The linkage control unit is electrically connected to the external terminal (2131) of the heating layer (213), the piezoelectric vibrator (222), and the screw drive module of the injection molding machine, respectively, and is used to adaptively adjust the heating power of the heating layer (213) and the vibration frequency and amplitude of the piezoelectric vibrator (222) according to the screw speed.

7. The plastic part injection molding auxiliary unit according to claim 3, characterized in that, The vacuum insulation layer (211) is an integral structure that runs through three axial sections. Annular heat insulation rings are provided between adjacent feeding sections and compression sections, and between compression sections and homogenization sections.

8. The plastic part injection molding auxiliary unit according to claim 1, characterized in that, The heat-conducting layer (214) is a highly thermally conductive flexible bonding pad used to compensate for assembly gaps and ensure that the heat-conducting layer (214) is tightly bonded to the outer wall of the feed cylinder (13) and that heat is transferred evenly.

9. The plastic part injection molding auxiliary unit according to claim 1, characterized in that, A high-temperature resistant buffer pad is provided between the semi-annular base (221) and the outer wall of the segmented heat treatment component (21), and a protective cover covering the piezoelectric vibrating plate (222) is provided on the outer side of the semi-annular base (221).

10. An injection molding apparatus, characterized in that: Includes a main unit (1), on which a material supply injection unit (11) and a mold unit (12) are provided, and the material supply injection unit (11) is equipped with a material feed cylinder (13). It also includes a plastic injection molding auxiliary unit as described in any one of claims 1 to 9, wherein the plastic injection molding auxiliary unit is covered and sleeved on the outer wall of the feed cylinder (13).

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