A composite injection molding mold

Abstract

The present application relates to resin-based composite material forming technical field, especially to a kind of composite material injection molding mold, including injection module, forming module and glue suction module, injection module and forming module are connected with forming mold glue injection line, forming module and glue suction module are connected with forming mold glue outlet line, forming mold glue injection line includes first branch pipe and second branch pipe, one end of first branch pipe is provided with injection module glue outlet stop valve for connecting injection module, one end of forming module is provided with forming module glue inlet stop valve, the outlet of second branch pipe is used to connect first resin collection tank, first glue valve is arranged on second branch pipe;Injection module is communicated with high-pressure gas source by high-pressure gas pipeline;Solve the process and heating solidification process between the process discontinuity problem caused by transfer injection device and resin collection device, and the higher environmental management cost problem caused by high viscosity resin in solvent cleaning injection device and resin collection device.

Description

Technical Field

[0001] This invention relates to the field of resin-based composite material molding technology, and more particularly to a composite material injection molding die. Background Technology

[0002] Resin transfer molding (RTM) technology works by first laying a pre-designed preform in a mold cavity, then injecting a specialized resin system into the cavity using an injection molding machine. The resin flows out gases from the cavity while simultaneously impregnating fibers. After heating and curing, cooling and demolding yield the composite material part. For resin systems requiring high-temperature injection, after the injection process, the injection unit and resin collection device must be removed from the oven where the molding process will begin, and any remaining resin in the devices must be cleaned with solvents. Since the remaining resin in the injection unit and collection device becomes more viscous upon contact with room temperature, it is difficult to clean, requiring large amounts of solvent and increasing environmental remediation costs. Summary of the Invention

[0003] This invention addresses the above-mentioned problems by proposing a composite material injection molding die. Its purpose is to solve the problem of process discontinuity caused by the transfer injection device and resin collection device between the injection process and the heating and curing process, as well as the problem of high environmental remediation costs caused by using solvent to clean the high-viscosity resin in the injection device and resin collection device.

[0004] To achieve the above objectives, the present invention provides a device comprising: an injection module, a molding module, and a glue suction module. The injection module and the molding module are connected by a molding mold glue injection pipeline, and the molding module and the glue suction module are connected by a molding mold glue discharge pipeline. The molding mold glue injection pipeline includes a first branch pipe guiding resin from the inner cavity of the injection module into the inner cavity of the molding module, and a second branch pipe guiding resin from the inner cavity of the injection module out of a high-temperature environment. One end of the first branch pipe connected to the injection module is equipped with an injection module glue discharge port stop valve, and the other end connected to the molding module is equipped with a molding module glue inlet stop valve. The outlet of the second branch pipe is used to connect to a first resin collection tank, and a first glue discharge valve is provided on the second branch pipe. The injection module is connected to a high-pressure gas source via a high-pressure gas pipeline.

[0005] Furthermore, the injection module is connected to the first vacuum source via a first vacuum pipeline. The first vacuum pipeline is equipped with a first vacuum source shut-off valve at one end connected to the first vacuum source and a vacuum pipeline shut-off valve at the other end connected to the injection module. The high-pressure gas pipeline is equipped with a high-pressure gas source shut-off valve at one end connected to the high-pressure gas source and a pressure pipeline shut-off valve at the other end connected to the injection module.

[0006] Furthermore, the inner cavity of the injection module is provided with a heat-conducting structure that acts on the resin inside the cavity.

[0007] Furthermore, the injection module includes a lower injection mold, an intermediate injection mold, and an upper injection mold. The heat-conducting structure includes a transverse rib and a longitudinal rib of the intermediate mold that are formed on the surface of the intermediate injection mold. The transverse rib and the longitudinal rib penetrate the surface of the intermediate injection mold and divide the intermediate injection mold into multiple independent resin storage cavities.

[0008] Furthermore, the heat-conducting structure includes multiple glue-flowing grooves arranged on the lower parting surface of the injection mold. The multiple glue-flowing grooves are arranged in a crisscross pattern, dividing the lower parting surface into multiple lower mold protrusions. The glue-flowing grooves are connected to the resin storage cavity. The glue-flowing grooves are provided with lower mold injection holes, which are connected to the injection module's glue outlet shut-off valve. The lower parting surface is the surface where the injection mold and the injection die contact each other.

[0009] Furthermore, the intersection of the middle mold horizontal rib and the middle mold vertical rib is located within the end face range of the lower mold protrusion.

[0010] Furthermore, the heat-conducting structure includes multiple venting grooves provided on the upper parting surface of the upper injection mold. The multiple venting grooves are arranged in a crisscross pattern, dividing the upper parting surface into multiple upper mold protrusions. The venting grooves are connected to the resin storage cavity. The venting grooves are provided with vacuum pipeline connection holes and pressure pipeline connection holes. The vacuum pipeline connection holes are connected to the vacuum pipeline shut-off valve, and the pressure pipeline connection holes are connected to the pressure pipeline shut-off valve. The upper parting surface is the surface where the upper injection mold and the middle injection mold contact each other.

[0011] Furthermore, the intersection of the middle mold horizontal rib and the middle mold vertical rib is located within the end face range of the upper mold protrusion.

[0012] Furthermore, the molding die dispensing pipeline includes a third branch pipe that guides the resin from the inner cavity of the molding module into the inner cavity of the glue suction module, and a fourth branch pipe that guides the resin from the inner cavity of the molding module out of the high-temperature environment. The end of the third branch pipe connected to the molding module is provided with a molding module dispensing port shut-off valve, and the end connected to the glue suction module is provided with a glue suction module inlet shut-off valve. The outlet of the fourth branch pipe is connected to a second resin collection tank, and a second dispensing valve is provided on the fourth branch pipe. A second vacuum source shut-off valve is provided on the second vacuum pipeline connecting the second resin collection tank and the second vacuum source.

[0013] Furthermore, the adhesive suction module includes a lower mold and an upper mold, and the inner cavity of the adhesive suction module is filled with adhesive suction material; the adhesive suction module has a discharge pipe that guides the resin into a third resin collection tank outside the high-temperature environment, and a discharge port stop valve of the adhesive suction module is provided at one end of the discharge pipe connected to the adhesive suction module, a third discharge valve is provided on the pipeline near the third resin collection tank, and a third vacuum source stop valve is provided on the third vacuum pipeline connecting the third resin collection tank and the third vacuum source.

[0014] The above-mentioned technical solution of the present invention has the following advantages: The present invention integrates the resin injection device and resin collection device in the resin transfer molding process with the molding module in the form of an injection module and a glue suction module, forming an integrated injection molding mold placed in a high-temperature curing environment chamber. After the injection process is completed, the injection module and the glue suction module do not need to be removed. The injection process and the subsequent heating and curing process can be carried out continuously, that is, the injection module and the glue suction module can be cured together with the molding module, ensuring the continuity of the process. After the curing process is completed, the cured resin residue in the injection module and the glue suction cured material in the glue suction module can be treated as solid waste. No chemical solvent cleaning is required after the injection process, which is environmentally friendly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a composite material injection molding die structure according to the present invention.

[0016] Figure 2 This is an assembly diagram of an injection module according to the present invention.

[0017] Figure 3 This is a top view of the cavity surface of an injection mold according to the present invention.

[0018] Figure 4 This is a structural diagram of an injection molding die according to the present invention.

[0019] Figure 5 This is a top view of the cavity surface of an injection mold according to the present invention.

[0020] Figure 6 This is a top view of the assembly of the lower injection mold and the middle injection mold according to the present invention.

[0021] Figure 7 This is a bottom view of the assembly of the upper injection mold and the middle injection mold according to the present invention.

[0022] In the picture:

[0023] 10. Injection module; 100. Lower injection mold; 100-1. Lower mold sealing groove; 100-2. Lower mold injection hole; 100-3. Lower parting surface; 100-4. Lower mold protrusion; 100-5. Glue flow channel; 110. Middle injection mold; 110-1. Middle parting surface; 110-2. Middle mold sealing groove; 110-3. Resin storage cavity; 110-4. Middle mold horizontal rib; 110-5. Middle mold vertical rib; 120. Upper injection mold; 120-1. Upper parting surface; 120-2. Upper mold protrusion; 120-3. Vent groove; 120-4. Vacuum line connection hole; 120-5. Pressure line connection hole; 130. Bolt hole;

[0024] 20. Molding module; 200. Upper mold of molding module; 210. Lower mold of molding module; 220. Fiber preform;

[0025] 30. Adhesive suction module; 300. Lower mold of adhesive suction module; 310. Upper mold of adhesive suction module; 320. Adhesive suction material;

[0026] 40. First vacuum source; 41. First vacuum source shut-off valve; 42. First vacuum pipeline; 43. Vacuum pipeline shut-off valve;

[0027] 50. Second vacuum source; 51. Second vacuum source shut-off valve; 52. Second vacuum pipeline;

[0028] 60. Third vacuum source; 61. Third vacuum source shut-off valve; 62. Third vacuum pipeline;

[0029] 70. High-pressure gas source; 71. High-pressure gas source shut-off valve; 72. High-pressure gas pipeline; 73. Pressure pipeline shut-off valve;

[0030] 80. Molding mold injection piping; 80-1. First branch pipe; 80-2. Second branch pipe; 80-3. Molding mold injection piping tee connector; 80-4. First discharge valve; 80-5. Injection module outlet shut-off valve; 80-6. Molding module inlet shut-off valve;

[0031] 81. Molding mold outlet pipe; 81-1 Third branch pipe; 81-2 Fourth branch pipe; 81-3. Molding mold outlet pipe tee interface; 81-4. Second discharge valve; 81-5. Molding module outlet shut-off valve; 81-6. Adhesive suction module inlet shut-off valve;

[0032] 82. Dispensing hose; 82-1. Third dispensing valve; 82-2. Dispensing port shut-off valve of the dispensing module;

[0033] 83. First resin collection tank; 84. Second resin collection tank; 85. Third resin collection tank;

[0034] 90. High-temperature curing environment chamber. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the following description, the directions in which the upper, middle, and lower molds of the injection molding die separate are used to illustrate the upper, middle, lower, front-back, and left-right directions. Furthermore, the upper, middle, lower, front-back, and left-right directions shown below are for ease of explanation, and the present invention is not necessarily limited to these directions. In addition, the number, shape, and arrangement of the various components are not necessarily limited to the illustrated descriptions without departing from the spirit of the present invention.

[0038] First, the structure of the composite material injection molding die is explained (refer to...). Figure 1 The system includes: injection module 10, molding module 20, and adhesive suction module 30.

[0039] The injection module 10, molding module 20, and adhesive suction module 30 are part of the composite material injection molding die. The injection module 10 and molding module 20 are connected to the molding die injection pipeline 80, and the molding module 20 and adhesive suction module 30 are connected to the molding die discharge pipeline 81. They are assembled in a high-temperature curing environment chamber 90.

[0040] The molding injection line 80 serves as a flow channel for resin to flow into the molding module 20 and out of the high-temperature curing environment chamber 90. It includes a first branch pipe 80-1 that guides the resin from the inner cavity of the injection module 10 into the inner cavity of the molding module 20, and a second branch pipe 80-2 that guides the resin from the inner cavity of the injection module 10 out of the high-temperature environment (i.e., the high-temperature curing environment chamber 90). After the injection process is completed, the remaining resin inside can flow out along the second branch pipe 80-2, so as to prevent the resin accumulated in the injection module from bursting during the module heating process.

[0041] The first branch pipe 80-1 is equipped with an injection module outlet shut-off valve 80-5 at one end connected to the injection module 10, and a molding module inlet shut-off valve 80-6 at the other end connected to the molding module 20. The outlet of the second branch pipe 80-2 is used to connect to the first resin collection tank 83, and a first dispensing valve 80-4 is provided on the second branch pipe 80-2; the injection module 10 is connected to the high-pressure gas source 70 through a high-pressure gas pipeline 72.

[0042] Understandably, during vacuuming, the injection module outlet valve 80-5 is closed. When releasing the remaining resin inside the injection module 10, the molding module inlet valve 80-6 is closed, and the first discharge valve 80-4 is opened. High-pressure gas is injected into the injection module 10 from the high-pressure gas source 70, driving the remaining resin in the injection module 10 to flow out from the second branch pipe 80-2 and fall into the first resin collection tank 83 outside the high-temperature curing environment chamber 90. This eliminates the need to remove the injection module 10 and clean the high-viscosity resin in the injection module 10 after the injection process, saving the time of removing the dedicated resin injection device between the injection and curing processes in the split injection system.

[0043] In one example of this embodiment, the molding injection line 80 is composed of a molding injection line tee interface 80-3 and three branch pipes.

[0044] like Figure 1 The injection module 10 has an upper injection mold 120, an middle injection mold 110, and a lower injection mold 100 that are separated in the vertical direction, such as Figure 2 As shown, after the upper injection mold 120, the middle injection mold 110 and the lower injection mold 100 are closed, they are fixed by fastening bolts passing through bolt holes 130.

[0045] Figures 3-5 The three-dimensional structures are injection lower mold 100, injection middle mold 110 and injection upper mold 120, respectively.

[0046] like Figure 3 As shown, the side of the injection mold 100 that contacts the injection middle mold 110 is the lower parting surface 100-3 of the injection mold 100. The lower parting surface 100-3 has crisscrossing glue flow grooves 100-5, which divide the lower parting surface 100-3 into a plurality of lower mold protrusions 100-4. The upper surface of the lower mold protrusions 100-4 is coplanar with the lower parting surface 100-3. The injection mold 100 has a lower mold injection hole 100-2 extending from the outer surface to the lower parting surface 100-3. As a preferred example of this embodiment, the lower mold injection hole 100-2 is connected to the glue flow grooves 100-5 and is located in the middle position of the injection mold 100. Those skilled in the art should understand that when the lower mold injection hole 100-2 is located in the middle region, the resin can be more evenly distributed in the glue flow grooves 100-5 after resin injection.

[0047] like Figure 4 As shown, the side of the injection mold 110 that contacts the injection mold 120 is used as the parting surface 110-1 of the injection mold 110. A transverse rib 110-4 and a longitudinal rib 110-5 are formed on the plate surface of the injection mold 110. The transverse rib 110-4 and the longitudinal rib 110-5 penetrate the plate surface of the injection mold 110, dividing the internal cavity of the injection mold 110 into multiple independent resin storage cavities 110-3. The transverse rib 110-4 and the longitudinal rib 110-5 are integral with the surrounding parts, which can better dissipate the heat released when the residual resin inside the injection mold 110 cures and prevent resin from bursting.

[0048] like Figure 5 As shown, the side of the upper injection mold 120 that contacts the middle injection mold 110 is used as the upper parting surface 120-1 of the upper injection mold 120. The upper parting surface 120-1 has crisscrossing ventilation grooves 120-3, which divide the upper parting surface 120-1 into multiple upper mold protrusions 120-2. The upper surface of the upper mold protrusions 120-2 is coplanar with the upper parting surface 120-1. The upper injection mold 120 has a vacuum pipeline connection hole 120-4 and a pressure pipeline connection hole 120-5 extending from the outer surface to the upper parting surface 120-1. As a preferred example of this embodiment, both the vacuum pipeline connection hole 120-4 and the pressure pipeline connection hole 120-5 are connected to the ventilation grooves 120-3 and are located in the middle position of the upper injection mold 120.

[0049] A lower mold sealing groove 100-1 is machined on the lower parting surface 100-3 of the lower injection mold 100, and a middle mold sealing groove 110-2 is machined on the middle parting surface 110-1 of the middle injection mold 110. Before mold closing and assembly, sealing strips are placed in the lower mold sealing groove 100-1 and the middle mold sealing groove 110-2 to ensure that the entire injection module 10 has good sealing performance.

[0050] like Figure 6 As shown, after the injection lower mold 100 and the injection middle mold 110 are assembled, the resin storage cavity 110-3 is connected to the glue flow channel 100-5. The intersection of the middle mold horizontal rib 110-4 and the middle mold vertical rib 110-5 is located within the range of the lower mold protrusion 100-4 on the lower parting surface 100-3.

[0051] like Figure 7 As shown, after the injection upper mold 120 and the injection middle mold 110 are assembled, the middle parting surface 110-1 and the upper parting surface 120-1 are coplanar; the resin storage cavity 110-3 is connected to the venting groove 120-3; the intersection of the middle mold horizontal rib 110-4 and the middle mold vertical rib 110-5 is located within the range of the upper mold protrusion 120-2 on the upper parting surface 120-1.

[0052] Since the resin curing reaction is exothermic, the temperature will rise sharply and cause explosive polymerization if no cooling measures are taken. Therefore, the above embodiment uses integrated transverse and longitudinal ribs to divide the inner cavity of the injection module 10 into multiple resin storage chambers 110-3. This ensures uniform heat conduction of the resin within the injection module 10 throughout the entire injection process, as well as the subsequent heating and curing processes, preventing explosive polymerization. After the curing process is complete, the resin residue in the injection module 10 can be disposed of as solid waste.

[0053] Please continue to refer to Figure 1 Vacuum line connection hole 120-4 of injection mold 120 is connected to vacuum line shut-off valve 43, and pressure line connection hole 120-5 is connected to pressure line shut-off valve 73. Vacuum line shut-off valve 43 is connected to the first vacuum source 40 via a first vacuum line 42, and a first vacuum source shut-off valve 41 is installed on the first vacuum line 42 to control its opening. Pressure line shut-off valve 73 is connected to the high-pressure gas source 70 via a high-pressure gas line 72, and a high-pressure gas source shut-off valve 71 is installed on the high-pressure gas line 72 to control its opening. Injection module outlet shut-off valve 80-5 is connected to injection module outlet shut-off valve 100-2 of injection mold 100, and molding mold injection line 80 is connected to injection module outlet shut-off valve 80-5. When evacuating, close the pressure line shut-off valve 73 and the injection module outlet shut-off valve 80-5, and open the first vacuum source shut-off valve 41 and the vacuum line shut-off valve 43.

[0054] Furthermore, the molding module 20 includes an upper molding module 200 and a lower molding module 210, with the fiber preform 220 to be molded contained within its inner cavity. The lower molding module 210 is equipped with a molding module inlet stop valve 80-6, and the injection hole connected to the molding module inlet stop valve 80-6 communicates with the inner cavity of the molding module 20. The upper molding module 200 is equipped with a molding module outlet stop valve 81-5, and the outlet hole connected to the molding module outlet stop valve 81-5 communicates with the inner cavity of the molding module 20.

[0055] The molding die dispensing pipe 81 includes a third branch pipe 81-1 that guides the resin from the inner cavity of the molding module 20 into the inner cavity of the glue suction module 30, and a fourth branch pipe 81-2 that guides the resin from the inner cavity of the molding module 20 out of the high-temperature environment. One end of the third branch pipe 81-1 connected to the molding module 20 is connected to the molding module dispensing port shut-off valve 81-5. One end connected to the glue suction module 30 is provided with a glue suction module inlet shut-off valve 81-6. The outlet of the fourth branch pipe 81-2 is connected to the second resin collection tank 84 outside the high-temperature curing environment chamber 90, and a second dispensing valve 81-4 is provided on the fourth branch pipe 81-2. A second vacuum source shut-off valve 51 is provided on the second vacuum pipe 52 that connects the second resin collection tank 84 and the second vacuum source 50.

[0056] When evacuating the molding module 20, open the molding module inlet stop valve 80-6, the molding module outlet stop valve 81-5, the second discharge valve 81-4, and the second vacuum source stop valve 51, and close the injection module outlet stop valve 80-5, the first discharge valve 80-4, and the suction module inlet stop valve 81-6. Evacuate the molding module 20 through the second vacuum source 50.

[0057] Furthermore, the resin suction module 30, used for resin processing, includes a lower mold 300 and an upper mold 310, with resin suction material 320 stored in its internal cavity. The lower mold 300 is equipped with a resin suction inlet shut-off valve 81-6, and the injection hole connected to the valve 81-6 communicates with the internal cavity of the resin suction module 30. The upper mold 310 is equipped with a resin suction outlet shut-off valve 82-2, and the outlet hole connected to the valve 82-2 communicates with the internal cavity of the resin suction module 30. A third discharge valve 82-1 is connected to the discharge pipe 82 between the discharge pipe 82 and the third resin collection tank 85. A third vacuum source shut-off valve 61 is installed on the pipe connecting the third resin collection tank 85 and the third vacuum source 60 via the third vacuum pipe 62.

[0058] When vacuuming the glue suction module 30, open the glue suction module inlet shut-off valve 81-6, glue suction module outlet shut-off valve 82-2, third glue release valve 82-1, and third vacuum source shut-off valve 61, close the molding module outlet shut-off valve 81-5 and second glue release valve 81-4, and vacuum the glue suction module 30 through the third vacuum source 60.

[0059] In at least one example of the adhesive absorption module 30, the adhesive absorption material 320 may include fiberglass cloth, chopped carbon fiber, adhesive absorption mat, etc. After curing, the adhesive absorption material filled with the resin flowing out of the molding module 20 can be taken out from the adhesive absorption module 30 and disposed of as solid waste.

[0060] In at least one example of the first resin collection tank 83, the second resin collection tank 84, and the third resin collection tank 85, the collection tank can be a disposable, low-cost resin collection tank. Since most of the resin is absorbed and cured by the adhesive absorption module 30, only a small amount of resin remains after the injection process is completed and is then released from the injection module 10. Therefore, in actual use, the second resin collection tank 84 and the third resin collection tank 85 can be selected with a smaller capacity than the first resin collection tank 83. Of course, this application is not limited to this.

[0061] It should be noted that the residual and small amount of resin that leaks out is collected by the first resin collection tank 83, the second resin collection tank 84, and the third resin collection tank 85. When cleaning them, the resin in the three sets of resin collection tanks is poured into a special resin collection bucket for centralized treatment, and then the inner surface is wiped clean with gauze soaked in solvent. This greatly reduces the amount of chemical solvent used compared to cleaning the injection device and resin collection device of the split injection system.

[0062] In one embodiment of this application, the following description uses a method of using a composite material injection molding die as an example.

[0063] Please see Figure 1 Depending on different needs, the order of the steps in this invention can be changed, and some steps can be omitted. Specifically, it includes the following steps:

[0064] Step S1: Fill the lower mold sealing groove 100-1 of injection module 10 and the middle mold sealing groove 110-2 of injection module 20 with sealing strips. Fix the upper injection mold 120, middle injection mold 110 and lower injection mold 100 with fastening bolts. Open the vacuum pipeline shut-off valve 43, close the pressure pipeline shut-off valve 73, open the injection module outlet shut-off valve 80-5, evacuate the inner cavity of injection module 10, and draw resin in from the injection module outlet shut-off valve 80-5.

[0065] Step S2: Place the formed fiber preform 220 into the inner cavity of the forming module 20, and fix the upper mold 200 and the lower mold 210 of the forming module with fastening bolts. The upper mold 200 and the lower mold 210 of the forming module are sealed with a sealing strip.

[0066] Step S3: Place the adhesive absorption material 320 into the internal cavity of the adhesive absorption module 30, and fix the lower mold 300 and the upper mold 310 of the adhesive absorption module with fastening bolts. The lower mold 300 and the upper mold 310 of the adhesive absorption module are sealed with a sealing strip.

[0067] Step S4: Connect the molding module 20, injection module 10, and adhesive suction module 30 through pipelines and place them into the high-temperature curing environment chamber 90. Connect the external pipelines and valves of each component module.

[0068] Step S5: Close the pressure pipeline shut-off valve 73 and the injection module outlet shut-off valve 80-5; open the first vacuum source shut-off valve 41 and the vacuum pipeline shut-off valve 43; use the first vacuum source 40 to vacuum and degas the resin in the injection module 10; open the molding module inlet shut-off valve 80-6, the molding module outlet shut-off valve 81-5, the second discharge valve 81-4, and the second vacuum source shut-off valve 51; close the injection module outlet shut-off valve 80-5, the first discharge valve 80-4, and the glue suction module inlet shut-off valve 81-6; use the second vacuum source 50 to evacuate the molding module 20; open the glue suction module inlet shut-off valve 81-6, the glue suction module outlet shut-off valve 82-2, the third discharge valve 82-1, and the third vacuum source shut-off valve 61; close the molding module outlet shut-off valve 81-5 and the second discharge valve 81-4; use the third vacuum source 60 to evacuate the glue suction module 30.

[0069] Step S6: Close the vacuum pipeline shut-off valve 43, the first dispensing valve 80-4, and the glue inlet shut-off valve 81-6 of the glue suction module; open the high-pressure gas source shut-off valve 71, the pressure pipeline shut-off valve 73, the injection module glue outlet shut-off valve 80-5, the molding module glue inlet shut-off valve 80-6, the molding module glue outlet shut-off valve 81-5, the second dispensing valve 81-4, and the second vacuum source shut-off valve 51; inject high-pressure gas into the injection module 10 from the high-pressure gas source 70 to drive the resin injection.

[0070] Step S7: When the resin flows out from the second dispensing valve 81-4, close the second dispensing valve 81-4, open the glue inlet shut-off valve 81-6 of the glue suction module, the glue outlet shut-off valve 82-2 of the glue suction module, the third dispensing valve 82-1 and the third vacuum source shut-off valve 61, and continue resin injection.

[0071] Step S8: When the resin flows out from the third dispensing valve 82-1, close the third dispensing valve 82-1, the molding module inlet stop valve 80-6, the molding module outlet stop valve 81-5, the suction module inlet stop valve 81-6, and the suction module outlet stop valve 82-2, and the resin injection process ends.

[0072] Step S9: Open the high-pressure gas source shut-off valve 71, the pressure pipeline shut-off valve 73, and the first discharge valve 80-4; close the vacuum pipeline shut-off valve 43 and the molding module inlet shut-off valve 80-6; inject high-pressure gas from the high-pressure gas source 70 to release the remaining resin in the injection module 10; after the discharge is completed, close the pressure pipeline shut-off valve 73; when the pressure inside the injection module 10 is consistent with the ambient air pressure, close the injection module outlet shut-off valve 80-5 and the first discharge valve 80-4; open the first vacuum source shut-off valve 41 and the vacuum pipeline shut-off valve 43 to evacuate the injection module 10.

[0073] Step S10: Increase the temperature inside the high-temperature curing environment chamber 90 to carry out the mold heating process. During the heating process, the injection module 10 is evacuated throughout.

[0074] Step S11: After the molding module 20 reaches the curing temperature, the curing process begins. At this time, the glue injection module 10, the glue suction module 30 and the molding module 20 are curing simultaneously.

[0075] Step S12: After the curing process is completed, start cooling. After cooling is completed, disconnect the pipes connected to the glue injection module 10, glue suction module 30 and molding module 20, and take out the part from the molding module 20.

[0076] Step S13: Remove the adhesive absorption module 30, take out the cured adhesive from it, and dispose of it as solid waste.

[0077] Step S14: Remove the glue injection module 10, clean the solidified resin residue on the inner surface of the glue injection module 10, and treat the resin residue as solid waste.

[0078] The injection unit and resin collection unit, in the form of injection module 10 and suction module 30, are integrated with molding module 20 to form an integrated mold, which is then placed in high-temperature curing environment chamber 90. The injection and curing processes can be carried out continuously. Injection module 10 and suction module 30 can be cured together with molding module 20, saving the time required to remove the dedicated resin injection unit between injection and curing processes in separate injection systems. The injection module 10 employs a structure with multiple resin storage chambers 110-3 formed by transverse and longitudinal ribs, which can dissipate heat evenly and prevent explosive polymerization. After the curing process, injection module 10 and suction module 30 do not require cleaning with solvents, reducing environmental remediation costs.

[0079] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A composite injection molding mold characterized by, The injection module, the forming module, and the glue suction module are connected with a forming mold glue injection pipeline and a forming mold glue outlet pipeline, wherein the forming mold glue injection pipeline comprises a first branch pipe for guiding the resin flow in the injection module cavity to flow into the forming module cavity and a second branch pipe for guiding the resin flow in the injection module cavity to flow out of the high-temperature environment, one end of the first branch pipe is connected with the injection module and provided with an injection module glue outlet stop valve, one end of the first branch pipe is connected with the forming module and provided with a forming module glue inlet stop valve, the outlet of the second branch pipe is connected with a first resin collection tank, and the second branch pipe is provided with a first glue discharge valve; the injection module is connected with a high-pressure gas source through a high-pressure gas pipeline; the cavity of the injection module is provided with a heat conduction structure for the resin in the cavity, the injection module comprises an injection lower mold, an injection middle mold, and an injection upper mold, the heat conduction structure comprises middle mold horizontal ribs and middle mold vertical ribs arranged on the surface of the injection middle mold plate, the middle mold horizontal ribs and the middle mold vertical ribs penetrate the surface of the injection middle mold plate, and the injection middle mold is divided into a plurality of independent resin storage cavities; the heat conduction structure comprises a plurality of glue flow grooves arranged on the lower parting surface of the injection lower mold, the plurality of glue flow grooves are arranged in a crisscross manner, the lower parting surface is divided into a plurality of lower mold protrusions, the glue flow grooves are connected with the resin storage cavities, the glue flow grooves are provided with lower mold glue injection holes, the lower mold glue injection holes are connected with the injection module glue outlet stop valve, the lower parting surface is the surface where the injection lower mold and the injection middle mold are in contact, the heat conduction structure comprises a plurality of air grooves arranged on the upper parting surface of the injection upper mold, the plurality of air grooves are arranged in a crisscross manner, the upper parting surface is divided into a plurality of upper mold protrusions, and the air grooves are connected with the resin storage cavities. The injection module is connected with a first vacuum source through a first vacuum pipeline, one end of the first vacuum pipeline connected with the first vacuum source is provided with a first vacuum source stop valve, and one end of the first vacuum pipeline connected with the injection module is provided with a vacuum pipeline stop valve; one end of the high-pressure gas pipeline connected with the high-pressure gas source is provided with a high-pressure gas source stop valve, and one end of the high-pressure gas pipeline connected with the injection module is provided with a pressure pipeline stop valve.

2. A composite injection molding tool as claimed in claim 1, characterized in that The air grooves are provided with a vacuum pipeline connection hole and a pressure pipeline connection hole, the vacuum pipeline connection hole is connected with the vacuum pipeline stop valve, the pressure pipeline connection hole is connected with the pressure pipeline stop valve, and the upper parting surface is the surface where the injection upper mold and the injection middle mold are in contact.

3. A composite material injection molding mold according to claim 2, wherein The intersection of the middle mold horizontal ribs and the middle mold vertical ribs is located in the end surface range of the lower mold protrusions.

4. A composite injection molding tool as defined in claim 1, characterized in that The intersection of the middle mold horizontal ribs and the middle mold vertical ribs is located in the end surface range of the upper mold protrusions.

5. A composite injection molding tool as defined in claim 1, characterized in that ​ 6. A composite material injection molding mold according to claim 1, wherein The forming die glue outlet pipeline comprises a third branch pipe for guiding resin flow in the forming module inner cavity into the suction die module inner cavity and a fourth branch pipe for guiding resin flow in the forming module inner cavity out of the high temperature environment, one end of the third branch pipe is connected with the forming module and is provided with a forming module glue outlet stop valve, one end of the third branch pipe is connected with the suction die module and is provided with a suction die module glue inlet stop valve, the outlet of the fourth branch pipe is connected with a second resin collecting tank, a second resin discharging valve is arranged on the fourth branch pipe, a second vacuum pipeline is arranged between the second resin collecting tank and a second vacuum source, and a second vacuum source stop valve is arranged on the second vacuum pipeline.

7. A composite material injection molding mold according to claim 1, wherein The suction die module comprises a suction die module lower die and a suction die module upper die, and the suction die module inner cavity is filled with a suction material; the suction die module is provided with a glue discharging pipe for guiding resin flow into a third resin collecting tank outside the high temperature environment, one end of the glue discharging pipe is connected with the suction die module and is provided with a suction die module glue outlet stop valve, a third glue discharging valve is arranged on the pipeline close to the third resin collecting tank, and a third vacuum pipeline is arranged between the third resin collecting tank and a third vacuum source, and a third vacuum source stop valve is arranged on the third vacuum pipeline.

Images