A manufacturing system and molding method for thermoplastic composite injection molded parts

Abstract

The application discloses a kind of manufacturing system and forming method of thermoplastic composite injection molded part, including machine base, the top right side of the machine base is provided with raw material extrusion mechanism, the top of the raw material extrusion mechanism is provided with injection hopper, and the application relates to injection molded part manufacturing technical field.The manufacturing system and forming method of thermoplastic composite injection molded part, through the mutual cooperation between servo motor, mold switching mechanism, extrusion hole and arc trapezoidal block, several molds frequently used in daily life can be installed in advance, the quick switching between molds is realized, the required left mold and right mold are quickly switched to the lowermost, so that it is in working condition, through the mutual cooperation between ejector rod, long strip, second spring and push rod, when left mold and right mold are separated, under the elastic action of second spring, push rod will move to left, injection molded part in right mold is pushed out to left, automatic demolding is realized, and processing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding part manufacturing, in particular to a manufacturing system and forming method of thermoplastic composite injection molding parts. BACKGROUND

[0002] Automobiles are composed of various components, including thermoplastic composite injection molding parts. However, there are many types of cars on the market, and each type of car requires injection molding parts of different diameters. Therefore, it is necessary to produce thermoplastic composite injection molding parts of various diameters.

[0003] Referring to the injection molding device for manufacturing automobile injection molding parts disclosed in Chinese Patent No. CN217073111U, by setting multiple forming dies, the number and efficiency of wire harness terminals are increased, thereby avoiding the situation that the existing injection molding equipment can only process a single wire harness terminal at a time, resulting in low injection molding efficiency and low production yield.

[0004] Based on the analysis of the above reference patents, the following defects can be found:

[0005] The existing manufacturing system and forming method of thermoplastic composite injection molding parts require replacing the mold containing the required forming cavity inner diameter size when producing thermoplastic composite injection molding parts of different diameters. Each replacement requires disassembling the entire mold and installing a mold containing a forming cavity of a different inner diameter. This process is complex and cannot install several frequently used molds in advance, making it difficult to achieve rapid switching between molds. Therefore, it is necessary to provide a manufacturing system and forming method of thermoplastic composite injection molding parts to solve the above technical problems. SUMMARY

[0006] To overcome the shortcomings of the prior art, the present application provides a manufacturing system and forming method of thermoplastic composite injection molding parts, which solves the problem of replacing the mold containing the required forming cavity inner diameter size when producing thermoplastic composite injection molding parts of different diameters. Each replacement requires disassembling the entire mold and installing a mold containing a forming cavity of a different inner diameter. This process is complex and cannot install several frequently used molds in advance, making it difficult to achieve rapid switching between molds.

[0007] In order to achieve the above object, the present application is realized by the following technical scheme: A manufacturing system of thermoplastic composite injection molded part, comprising a base, a raw material extrusion mechanism is arranged on the top right side of the base, a feeding hopper is arranged on the top of the raw material extrusion mechanism, a driving motor is arranged on the right side of the raw material extrusion mechanism, a placing box is fixedly arranged on the top left side of the base, a mold switching mechanism for processing thermoplastic composite injection molded part is arranged in the placing box, a motor box is fixedly arranged on the left side of the placing box, a servo motor is fixedly arranged in the motor box, a cooling mechanism for cooling the mold and the injection molded part is fixedly arranged on the left lower part of the placing box, an extrusion hole communicating with the raw material extrusion mechanism is formed on the right lower part of the placing box, an arc trapezoidal block is fixedly arranged on the left lower part of the inner cavity of the placing box, the mold switching mechanism comprises a left disc and a right disc, a shaft rod is fixedly penetrated between the middle parts of the left disc and the right disc, a plurality of left link frame assemblies are uniformly penetrated on the outer side of the left disc, a left mold is arranged on the right side of each left link frame assembly, a plurality of injection and discharge assemblies are uniformly arranged on the outer side of the right disc, a plurality of right molds are uniformly arranged on the outer side of the left disc of the right disc, a first through hole is formed in the middle of the right side of each right mold, and a first movable hole is formed on the right side of each right mold and at both ends of the first through hole.

[0008] Preferably, the right side of the placing box is fixedly connected with the left side of the raw material extrusion mechanism, a blanking cavity is formed on the left side of the base, the right end of the shaft rod is rotatably connected to the right wall of the inner cavity of the placing box, the left end of the shaft rod penetrates the left wall of the placing box and is fixedly connected with the output shaft of the servo motor, each right mold is threadedly connected with the right disc through a plurality of second bolts, the number of the plurality of left molds, the plurality of injection and discharge assemblies and the plurality of right molds is the same, and the positions of the plurality of left molds, the plurality of injection and discharge assemblies and the plurality of right molds are one-to-one corresponding.

[0009] Preferably, each left link frame assembly comprises a bearing circular plate, a connecting rod is fixedly arranged on the left side of the bearing circular plate and penetrates the inner part of the left disc, a semicircular block is fixedly arranged on the left end of the connecting rod, a first spring is sleeved on the outer part of the connecting rod, the first spring is fixedly connected between the right side of the semicircular block and the left wall of the left disc, and protrusions are fixedly arranged on the front and rear ends and the top of the bearing circular plate.

[0010] Preferably, a top rod penetrating the right disc is fixedly arranged on the right side of the protrusion, a wear-resistant spherical body is fixedly arranged on the right end of the top rod, and the outer side of the left mold is threadedly connected with the bearing circular plate through a plurality of first bolts.

[0011] Preferably, the injection and discharge assembly includes a receiving cylinder fixedly connected to the right side of the right disc, a second through hole is provided in the middle of the left side of the receiving cylinder, and a second movable hole is provided at both ends of the left side of the receiving cylinder and located at the second through hole, and a piston plate is slidably disposed inside the receiving cylinder.

[0012] Preferably, a hollow rod penetrating the right wall of the receiving cylinder is fixedly disposed in the middle of the right side of the piston plate, and a receiving block is fixedly disposed at the right end of the hollow rod. A second spring is sleeved on the outside of the hollow rod, and the second spring is fixedly connected between the left wall of the receiving block and the right wall of the receiving cylinder.

[0013] Preferably, long strip plates are fixedly provided at the front, rear, and top of the receiving round block, and a material injection branch pipe is fixedly passed through the middle of the left side of the piston plate. Push rods are fixedly provided on the left side of the piston plate and at both ends of the material injection branch pipe. The material injection branch pipe slides through the interior between the second through hole and the first through hole.

[0014] Preferably, the push rod slides through the interior of the second movable hole and the first movable hole, and the left molds are completely identical except for the size of the inner diameter of the forming cavity, and the right molds are completely identical except for the size of the inner diameter of the forming cavity.

[0015] This invention also provides a molding method for a manufacturing system of thermoplastic composite injection molded parts, the specific method including the following steps:

[0016] Step 1: According to the processing requirements, rotate the left and right molds containing the required inner diameter of the forming cavity to the bottom in advance. During the process, simply start the servo motor in the motor box to drive the mold switching mechanism to rotate and rotate the required left and right molds to the bottom. Under the limiting action of the arc-shaped trapezoidal block, the left and right molds at the bottom are tightly fitted together. At this time, the hollow rod, the receiving round block, the injection branch pipe, the right mold, the left mold and the extrusion hole are in a connected state. At the same time, the left side of the injection branch pipe and the push rod are in the same vertical and horizontal state as the left side of the first through hole and the first movable hole.

[0017] Step 2: After adjusting the positions of the left and right molds, load the granular plastic raw material into the injection hopper. The raw material extrusion mechanism consists of a screw and a heating cylinder. The drive motor provides power to drive the screw to rotate and feed the raw material into the heating cylinder. The raw material is pressurized and melted. The melted plastic is injected into the forming cavities of the corresponding left and right molds. The cooling mechanism controls the temperature inside the placement box to cool and solidify the raw material in the left and right molds.

[0018] Step three, after cooling and solidification, start the servo motor in the motor box, drive the mold switching mechanism to rotate clockwise, under the elastic force of the first spring, make the left connection frame assembly at the bottom slide along the inclined surface of the arc-shaped trapezoidal block, and move to the left, and then make the left mold at the bottom separate from the right mold, in the process, the top rod moves to the left, and the pushing of the long strip plate is released, under the elastic force of the second spring, the piston plate, the injection branch pipe and the push rod move to the left, push the molded composite injection molded part in the right mold out, and the composite injection molded part falls into the dropping cavity automatically.

[0019] Preferably, the inclined surface angles of the arc-shaped trapezoidal block on both sides are the same, and the interiors of the hollow rod, the receiving circular block and the injection branch pipe are in communication.

[0020] Beneficial effects

[0021] The application provides a manufacturing system and a forming method of a thermoplastic composite injection molded part.

[0022] 1. A manufacturing system and a forming method of a thermoplastic composite injection molded part, through the cooperation of a servo motor, a mold switching mechanism, an extrusion hole and an arc-shaped trapezoidal block, several molds frequently used in daily life can be installed in advance, the molds can be switched quickly, and the required left mold and right mold can be switched to the bottom to be in a working state.

[0023] 2. A manufacturing system and a forming method of a thermoplastic composite injection molded part, through the cooperation of a left mold, a first bolt, a right mold and a second bolt, the left mold and the right mold can be flexibly disassembled and replaced with more molds containing different inner diameter size forming cavities, the use range is wide, and a plurality of diameter size composite injection molded parts can be processed.

[0024] 3. A manufacturing system and a forming method of a thermoplastic composite injection molded part, through the cooperation of a top rod, a long strip plate, a second spring and a push rod, during the separation of the left mold and the right mold, under the elastic force of the second spring, the push rod moves to the left, pushes the injection molded part in the right mold to the left, realizes automatic demolding, and improves processing efficiency.

[0025] 4. A manufacturing system and a forming method of a thermoplastic composite injection molded part, through the cooperation of a servo motor, an arc-shaped trapezoidal block, a connecting rod and a first spring, only relying on the servo motor as a power drive, the switching between molds, mold opening and demolding can be realized, the structure is simple but the linkage is strong, and the waste of energy is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a perspective view of the application;

[0027] Figure 2 This is a partial cross-sectional perspective view of the present invention;

[0028] Figure 3 This is an exploded view of the placement box and mold switching mechanism of the present invention;

[0029] Figure 4 This is a sectional perspective view of the placement box of the present invention;

[0030] Figure 5 This is a perspective view of the mold switching mechanism of the present invention;

[0031] Figure 6 This is an exploded view of the mold switching mechanism of the present invention;

[0032] Figure 7 This is an exploded view of the left connecting frame assembly of the present invention;

[0033] Figure 8 This is a perspective view of the right disk of the present invention;

[0034] Figure 9 This is a first exploded view of the material injection and discharge assembly of the present invention;

[0035] Figure 10 This is a perspective view of the material injection and discharge assembly of the present invention;

[0036] Figure 11 This is a second exploded view of the material injection and discharge assembly of the present invention;

[0037] Figure 12 This is a perspective view of the right mold of the present invention.

[0038] In the diagram: 1. Base; 2. Raw material extrusion mechanism; 3. Injection hopper; 4. Drive motor; 5. Placement box; 6. Mold switching mechanism; 61. Left disc; 62. Right disc; 63. Shaft; 64. Left connecting frame assembly; 641. Bearing disc; 642. Connecting rod; 643. Semicircular block; 644. First spring; 645. Protrusion; 646. Push rod; 647. Wear-resistant ball; 65. Left mold; 66. First bolt; 67. Injection and discharge assembly; 671. Receiving cylinder; 672. Second through hole; 673. Second movable hole; 674. Piston plate; 675. Hollow rod; 676. Receiving round block; 677. Second spring; 678. Long strip plate; 679. Injection branch pipe; 6710. Push rod; 68. Right mold; 69. Second bolt; 610. First through hole; 611. First movable hole; 7. Motor box; 8. Cooling mechanism; 9. Extrusion hole; 10. Arc-shaped trapezoidal block; 11. Discharge chamber. Detailed Implementation

[0039] Clearly, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0040] The present application provides two technical solutions:

[0041] As Figures 1-5 The first embodiment is shown: a thermoplastic composite injection molding part manufacturing system, comprising a base 1, the top right side of the base 1 is provided with a raw material extrusion mechanism 2, the top of the raw material extrusion mechanism 2 is provided with a feeding hopper 3, the right side of the raw material extrusion mechanism 2 is provided with a driving motor 4, the top left side of the base 1 is fixedly provided with a placing box 5, the inside of the placing box 5 is provided with a mold switching mechanism 6 for processing thermoplastic composite injection molding parts, the left side of the placing box 5 is fixedly provided with a motor box 7, the inside of the motor box 7 is fixedly provided with a servo motor, the left lower part of the placing box 5 is fixedly provided with a cooling mechanism 8 for cooling the mold and the injection molding part, the lower right side of the placing box 5 is provided with an extrusion hole 9 communicated with the raw material extrusion mechanism 2, the left lower part of the inner cavity of the placing box 5 is fixedly provided with an arc trapezoidal block 10, the mold switching mechanism 6 comprises a left disc 61 and a right disc 62, a shaft 63 is fixedly penetrated between the middle parts of the left disc 61 and the right disc 62, a plurality of left link frame assemblies 64 are uniformly penetrated on the outer side of the left disc 61, a left mold 65 is arranged on the right side of each left link frame assembly 64, a plurality of injection and discharge assemblies 67 are uniformly arranged on the outer right side of the right disc 62, a plurality of right molds 68 are uniformly arranged on the outer left side of the right disc 62, a first through hole 610 is formed in the right middle of each right mold 68, and a first movable hole 611 is formed on the right side of each right mold 68 and at both ends of the first through hole 610.

[0042] Through the mutual cooperation between the servo motor, the mold switching mechanism 6, the extrusion hole 9 and the arc trapezoidal block 10, several molds frequently used in daily life can be installed in advance, the molds can be quickly switched, and the required left mold 65 and right mold 68 can be quickly switched to the lowermost part, so that they are in working condition.

[0043] As Figures 6-12The second embodiment is shown, and the main difference with the first embodiment is that the manufacturing system of the thermoplastic composite injection molding part, the right side of the placing box 5 is fixedly connected with the left side of the raw material extrusion mechanism 2, the left side of the machine base 1 is provided with a blanking cavity 11, the right end of the shaft rod 63 is rotatably connected to the right wall of the inner cavity of the placing box 5, the left end of the shaft rod 63 penetrates the left wall of the placing box 5 and is fixedly connected with the output shaft of the servo motor, each right mold 68 and the right disc 62 are threadedly connected by a plurality of second bolts 69, a plurality of left molds 65, a plurality of injection and discharge assemblies 67 and a plurality of right molds 68 are same in number and one-to-one corresponding in position, each left link assembly 64 comprises a bearing disc 641, a connecting rod 642 slidingly penetrating the inside of the left disc 61 is fixedly arranged at the left side of the bearing disc 641, a semicircle block 643 is fixedly arranged at the left end of the connecting rod 642, a first spring 644 is sleeved outside the connecting rod 642, the first spring 644 is fixedly connected between the right side of the semicircle block 643 and the left wall of the left disc 61, a protrusion 645 is fixedly arranged at the top of the bearing disc 641, a top rod 646 slidingly penetrating the right disc 62 is fixedly arranged at the right side of the protrusion 645, a wear-resistant ball 647 is fixedly arranged at the right end of the top rod 646, a plurality of first bolts 66 are threadedly connected between the left side of the left mold 65 and the bearing disc 641, the injection and discharge assembly 67 comprises a containing cylinder 671 fixedly connected to the right side of the right disc 62, a second through hole 672 is formed in the left side of the containing cylinder 671, a second movable hole 673 is formed in the left side of the containing cylinder 671 and located at both ends of the second through hole 672, a piston plate 674 is slidingly arranged in the inside of the containing cylinder 671, a hollow rod 675 penetrating the right wall of the containing cylinder 671 is fixedly arranged at the right side of the piston plate 674, a receiving disc 676 is fixedly arranged at the right end of the hollow rod 675, a second spring 677 is sleeved outside the hollow rod 675, the second spring 677 is fixedly connected between the left wall of the receiving disc 676 and the right wall of the containing cylinder 671, a long strip plate 678 is fixedly arranged at the top of the receiving disc 676, an injection branch pipe 679 is fixedly arranged at the left side of the piston plate 674, a push rod 6710 is fixedly arranged at the left side of the piston plate 674 and located at both ends of the injection branch pipe 679, the injection branch pipe 679 slidingly penetrates between the inside of the second through hole 672 and the first through hole 610, the push rod 6710 slidingly penetrates between the inside of the second movable hole 673 and the first movable hole 611, a plurality of left molds 65 are completely same in structure except that the diameters of the forming cavities are different, a plurality of right molds 68 are completely same in structure except that the diameters of the forming cavities are different.

[0044] Through the cooperation between the left mold 65, the first bolt 66, the right mold 68 and the second bolt 69, the left mold 65 and the right mold 68 can be flexibly disassembled and more molds containing different inner diameter sizes of forming cavities can be replaced, so that a wider range of uses can be achieved, and composite injection molded parts of various diameters can be processed. Through the cooperation between the ejector rod 646, the long strip plate 678, the second spring 677 and the push rod 6710, when the left mold 65 and the right mold 68 are separated, the push rod 6710 will move to the left under the elastic action of the second spring 677, and the injection molded part in the right mold 68 will be pushed out to the left, so that automatic demolding is realized, the processing efficiency is improved, and through the cooperation between the servo motor, the arc trapezoidal block 10, the connecting rod 642 and the first spring 644, only the servo motor is used as the power source, so that the switching between molds, mold opening and demolding can be realized, the structure is simple but the linkage is strong, and energy waste is avoided.

[0045] The embodiment of the present application also provides a molding method of a thermoplastic composite injection molded part manufacturing system, and the specific method comprises the following steps:

[0046] Step one, according to the processing needs, the left mold 65 and the right mold 68 containing the required forming cavity inner diameter size are rotated to the lowermost position in advance, and in the process, only the servo motor in the motor box 7 needs to be started to drive the mold switching mechanism 6 to rotate, so that the required left mold 65 and right mold 68 are rotated to the lowermost position. Under the limiting action of the arc trapezoidal block 10, the left mold 65 and the right mold 68 at the lowermost position are tightly attached together. At this time, the hollow rod 675, the receiving circular block 676, the injection material branch pipe 679, the right mold 68, the left mold 65 and the inside of the extrusion hole 9 are in communication, and the left side of the injection material branch pipe 679 and the push rod 6710 and the left side of the first through hole 610 and the first movable hole 611 are in the same vertical level.

[0047] Step two, after adjusting the position state of the left mold 65 and the right mold 68, the granular plastic raw material is loaded into the injection hopper 3. The raw material extrusion mechanism 2 is composed of a screw rod and a heating cylinder, and the driving motor 4 provides power to drive the screw rod to rotate and send the raw material into the heating cylinder. The raw material is pressurized and melted, and the melted plastic is injected into the corresponding forming cavity of the left mold 65 and the right mold 68. The principle of this process is the same as that of the injection molding machine, which belongs to the prior art known to those skilled in the art. The cooling mechanism 8 works to control the temperature in the placing box 5, so that the raw material in the left mold 65 and the right mold 68 is cooled and solidified.

[0048] Step three, after cooling and solidification, start the servo motor in the motor box 7, drive the mold switching mechanism 6 to rotate clockwise, under the elastic action of the first spring 644, make the left connection frame assembly 64 at the bottom slide along the slope of the arc-shaped trapezoidal block 10, and move to the left, and then make the left mold 65 at the bottom separate from the right mold 68, in the process, the top rod 646 moves to the left, and the pushing of the long strip plate 678 is released, under the elastic action of the second spring 677, the piston plate 674, the injection branch pipe 679 and the push rod 6710 move to the left, push the molded composite injection molded part in the right mold 68 out, and the composite injection molded part falls into the drop cavity 11 automatically, when it is needed to disassemble the corresponding left mold 65 and right mold 68, open the sealed door at the front end of the placing box 5, unscrew the corresponding first bolt 66 and the corresponding second bolt 69, and then the disassembly of the left mold 65 and the right mold 68 can be realized.

[0049] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives, and variations can be made in the embodiments without departing from the spirit and scope of the present application as defined by the appended claims and their equivalents.

Claims

1. A system for manufacturing a thermoplastic composite injection molded part, comprising a machine frame, characterized in that: The top right side of the base is provided with a raw material extrusion mechanism, the top of the raw material extrusion mechanism is provided with a feeding hopper, the right side of the raw material extrusion mechanism is provided with a driving motor, the top left side of the base is fixedly provided with a placing box, the inside of the placing box is provided with a mold switching mechanism for processing thermoplastic composite injection molded parts, the left side of the placing box is fixedly provided with a motor box, the inside of the motor box is fixedly provided with a servo motor, the left lower part of the placing box is fixedly provided with a cooling mechanism for cooling the mold and the injection molded part, the lower right part of the placing box is provided with an extrusion hole communicated with the raw material extrusion mechanism, and the left lower part of the inner cavity of the placing box is fixedly provided with an arc trapezoidal block. The mold switching mechanism comprises a left disc and a right disc, a shaft rod is fixedly penetrated between the middle parts of the left disc and the right disc, a plurality of left link frame assemblies are uniformly penetrated on the outer side of the left disc, a left mold is arranged on the right side of each left link frame assembly, a plurality of injection and discharge assemblies are uniformly arranged on the outer right side of the right disc, a plurality of right molds are uniformly arranged on the outer left side of the right disc, a first through hole is formed in the middle of the right side of each right mold, and a first movable hole is formed on the right side of each right mold and at both ends of the first through hole; The right side of the placing box is fixedly connected with the left side of the raw material extrusion mechanism, the left side of the base is provided with a blanking cavity, the right end of the shaft rod is rotatably connected to the right wall of the inner cavity of the placing box, the left end of the shaft rod penetrates the left wall of the placing box and is fixedly connected with the output shaft of the servo motor, a plurality of second bolts are threadedly connected between each right mold and the right disc, a plurality of left molds, a plurality of injection and discharge assemblies and a plurality of right molds are the same in number and one-to-one corresponding in position; Each left link frame assembly comprises a bearing disc, a connecting rod is fixedly arranged on the left side of the bearing disc and penetrates the inside of the left disc, a semicircular block is fixedly arranged on the left end of the connecting rod, a first spring is sleeved on the outside of the connecting rod, the first spring is fixedly connected between the right side of the semicircular block and the left wall of the left disc, protrusions are fixedly arranged on the front and rear ends and the top of the bearing disc, a top rod penetrating the right disc is fixedly arranged on the right side of the protrusion, a wear-resistant ball body is fixedly arranged on the right end of the top rod, and the left outer side of the left mold is threadedly connected with the bearing disc through a plurality of first bolts. The injection and discharge assembly comprises a containing cylinder fixedly connected to the right side of the right disc, a second through hole is formed in the middle of the left side of the containing cylinder, second movable holes are formed in the left side of the containing cylinder and at both ends of the second through hole, a piston plate is slidably arranged in the containing cylinder, a hollow rod penetrating through the right wall of the containing cylinder is fixedly arranged in the middle of the right side of the piston plate, a receiving circular block is fixedly arranged at the right end of the hollow rod, a second spring is sleeved on the outside of the hollow rod and fixedly connected between the left wall of the receiving circular block and the right wall of the containing cylinder, long strip plates are fixedly arranged at the front and back ends and the top of the receiving circular block, an injection branch pipe is fixedly penetrated through the middle of the left side of the piston plate, push rods are fixedly arranged at both ends of the injection branch pipe on the left side of the piston plate, the injection branch pipe is slidably penetrated through the inside between the second through hole and the first through hole, the push rods are slidably penetrated through the inside between the second movable holes and the first movable holes, the left molds are completely same in structure except that the diameters of the forming cavities are different, and the right molds are completely same in structure except that the diameters of the forming cavities are different.

2. A molding method of a manufacturing system for the thermoplastic composite injection molded part according to claim 1, characterized by: The method comprises the following steps: Step one: according to the processing needs, the left mold and the right mold containing the required forming cavity diameter are rotated to the lowermost position in advance, in the process, only the servo motor in the motor box needs to be started to drive the mold switching mechanism to rotate, and the required left mold and right mold are rotated to the lowermost position, under the limiting action of the arc-shaped trapezoidal block, the left mold and the right mold at the lowermost position are tightly attached together, at this time, the inside between the hollow rod, the receiving circular block, the injection branch pipe, the right mold, the left mold and the extrusion hole is in communication, and the left side of the injection branch pipe and the push rod is in the same vertical level state as the left side of the first through hole and the first movable hole; Step two: after adjusting the position state of the left mold and the right mold, the granular plastic raw material is loaded into the injection hopper, wherein the raw material extrusion mechanism is composed of a screw rod and a heating cylinder, a driving motor provides power to drive the screw rod to rotate, the raw material is sent into the heating cylinder, the raw material is pressurized and melted, and the melted plastic is injected into the corresponding forming cavity of the left mold and the right mold, and the cooling mechanism works to control the temperature in the placing box, so that the raw material in the left mold and the right mold is cooled and solidified; Step three: after cooling and solidification, the servo motor in the motor box is started to drive the mold switching mechanism to rotate clockwise, under the elastic action of the first spring, the left adapter frame assembly at the lowermost position slides along the inclined surface of the arc-shaped trapezoidal block and moves to the left, so that the left mold and the right mold at the lowermost position are separated, in the process, the jacks move to the left to release the pushing of the long strip plates, under the elastic action of the second spring, the piston plate, the injection branch pipe and the push rod move to the left, the forming composite injection molded part in the right mold is pushed out, and the composite injection molded part automatically falls into the dropping cavity.

3. A molding method of a manufacturing system of a thermoplastic composite injection molded part according to claim 2, characterized in that: The inclined surface angles of the arc-shaped trapezoidal block on both sides are the same, and the inside between the hollow rod, the receiving circular block and the injection branch pipe is in communication.

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