Automotive upholstery and forming process thereof

Abstract

The invention discloses an automotive upholstery and a forming process thereof, and relates to the field of automotive upholstery processing, the automotive upholstery comprises a base, a storage box mounted at the bottom of the base, a lower mold cavity mounted at the top of the base and an upper mold cavity arranged above the lower mold cavity, and further comprises a mold closing mechanism used for controlling opening and closing of the upper mold cavity and the lower mold cavity; the automatic discharging mechanism is used for driving the formed part in the lower die cavity to move out in the process of controlling the upper die cavity to be separated from the lower die cavity; the agent injection mechanism is used for automatically injecting a release agent into the upper mold cavity and the lower mold cavity after the upper mold cavity and the lower mold cavity are closed; according to the automotive upholstery and the forming process thereof, the release agent is automatically obtained in the mold closing process, the obtained release agent can be automatically sprayed into the mold cavity after mold closing, the step that the release agent needs to be manually smeared into the mold cavity is omitted, and in the demolding process, the scraping ring is driven to clean the outer wall of the lower mold cavity, so that the demolding efficiency is improved. And the problem that the heat dissipation effect is influenced by scale on the outer side wall of the lower die cavity is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive interior part processing, and particularly relates to an automotive interior part and its forming process. Background Art

[0002] An injection mold is a commonly used tool for shaping heated and melted materials. When using an injection mold, the material needs to be heated and melted first, then injected into the mold cavity by an extruder, and then cooled to obtain the finished product.

[0003] In the patent with the publication number CN217434930U, an injection mold for facilitating the discharge of finished products in plastic injection is disclosed, including a base. A first buffer groove is opened at the top of the base, a buffer rod is movably connected to the inner wall of the first buffer groove, one end of the buffer rod is fixedly connected to a lower mold, an upper mold is movably connected to the top of the lower mold, and a second buffer groove is opened at the top of the base. This injection mold for facilitating the discharge of finished products in plastic injection can perform the discharge operation on the finished product after injection molding through the base, groove, electric push rod, connecting plate, limiting groove, inserting rod, vertical rod, through groove, movable groove, ejecting groove, ejecting rod and rubber head;

[0004] The above-mentioned related technologies have the following defects: In order to reduce the difficulty of demolding and ensure the quality of the appearance of the finished product, before injecting the material, a demolding agent needs to be sprayed inside the mold cavity, and it needs to be sprayed manually. Manual spraying takes a long time and the operation is not safe, resulting in low efficiency and safety in injection molding. Moreover, in the prior art, the inside of the mold cavity is cooled by means of a circulating water pipe, but a water scale layer is easily formed inside the circulating water pipe, and the water scale layer is difficult to clean, affecting the heat conduction effect. Summary of the Invention

[0005] The purpose of the present invention is to provide an automotive interior part and its forming process to solve the problems in the prior art that a demolding agent needs to be manually sprayed inside the mold cavity, manual spraying takes a long time and the operation is not safe, resulting in low efficiency and safety in injection molding, and in the prior art, the inside of the mold cavity is cooled by means of a circulating water pipe, but a water scale layer is easily formed inside the circulating water pipe, and the water scale layer is difficult to clean, affecting the heat conduction effect.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An automotive interior part forming process includes the following steps:

[0007] S1. Raw material preparation: Mix raw materials ABS and PC plastic particles according to a set weight ratio.

[0008] S2. Material plasticization: Heat and melt the mixed material through an injection device.

[0009] S3. Apply a release agent. During the mold closing process, the release agent is automatically sprayed inside the mold cavity.

[0010] S4. Injection molding. After the upper and lower mold cavities are closed, inject plastic melt into the mold cavity for filling, and then perform pressure holding and cooling and shaping.

[0011] S5. Demolding and taking out the material. Drive the two mold cavities to separate and eject the formed interior part.

[0012] S6. Injection molding inspection. Inspect the formed interior part.

[0013] Furthermore, the injection molding equipment includes a base, a storage tank installed at the bottom of the base, a lower mold cavity installed at the top of the base, and an upper mold cavity arranged above the lower mold cavity. The injection molding equipment further includes:

[0014] A mold closing mechanism, which is installed at the top of the base and is used to control the opening and closing of the upper mold cavity and the lower mold cavity.

[0015] An automatic discharging mechanism, which is installed inside the base and is connected to the mold closing mechanism, and is used to drive the formed part in the lower mold cavity to move out during the process of controlling the separation of the upper mold cavity and the lower mold cavity.

[0016] An injection mechanism, which is installed inside the base and has two groups. The injection mechanisms are respectively connected to the automatic discharging mechanism, the mold closing mechanism, and the storage tank, and are used to automatically inject the release agent into the inside of the upper mold cavity and the lower mold cavity after the upper mold cavity and the lower mold cavity are closed.

[0017] A cooling mechanism, which is installed inside the base and is used to cool the injected plastic in the upper mold cavity and the lower mold cavity.

[0018] A cleaning mechanism, which is installed inside the base and is connected to the automatic discharging mechanism, and is used to clean the side wall of the lower mold cavity during the process of separating the upper mold cavity and the lower mold cavity.

[0019] Furthermore, four columns are installed at the top of the base, and a top plate is installed at the top ends of the four columns.

[0020] Furthermore, the mold closing mechanism includes a hydraulic cylinder installed inside the top plate and a sliding seat fixedly connected to the extending end of the hydraulic cylinder. The upper mold cavity is installed at the bottom of the sliding seat, and a filling pipe is installed at the top of the upper mold cavity. The filling pipe is a telescopic structure.

[0021] Furthermore, an annular extension ring is installed at the bottom of the upper mold cavity, and an annular groove is formed at the top of the lower mold cavity. The extension ring and the annular groove are in conformity with each other.

[0022] Further, the automatic discharging mechanism includes two sliding rods fixedly connected to the bottom of the sliding seat, limit blocks respectively fixedly connected to the bottom ends of the two sliding rods, a movable plate located on top of the two limit blocks, a plurality of ejecting rods fixedly connected to the top of the movable plate, and a plurality of telescopic components installed at the bottom of the movable plate;

[0023] The bottom end of the sliding rod extends into the interior of the base and is slidably connected to the base;

[0024] The movable plate is located below the lower mold cavity, and the top end of the ejecting rod extends into the interior of the lower mold cavity and is slidably connected to the lower mold cavity;

[0025] The telescopic component includes a sealing cylinder fixedly connected to the inner wall of the bottom of the base, a first piston slidably connected inside the sealing cylinder, a lifting rod fixedly connected to the top of the first piston, and a first spring sleeved outside the sealing cylinder. The top end of the first spring is fixedly connected to the bottom of the movable plate, and the bottom end of the first spring is fixedly connected to the inner wall of the bottom of the base. Among them, the two sealing cylinders are connected to the injection mechanism.

[0026] Further, the injection mechanism includes a transition cylinder installed inside the base, a conduit installed between the transition cylinder and the sealing cylinder, a feed pipe installed at the bottom of the sealing cylinder, a telescopic pipe installed at the bottom of the sealing cylinder, an atomizing nozzle installed on the inner wall of the top of the upper mold cavity, a second piston installed inside the transition cylinder, and a second spring installed on the top of the second piston;

[0027] The top end of the telescopic pipe extends into the interior of the sliding seat and is connected to the atomizing nozzle;

[0028] The top end of the second spring is fixedly connected to the inner wall of the top of the transition cylinder;

[0029] The bottom end of the feed pipe extends into the interior of the storage tank, and a first one-way valve is installed on the feed pipe;

[0030] A second one-way valve is installed on the conduit;

[0031] A valve is installed on the telescopic pipe;

[0032] The injection mechanism further includes a linkage component for controlling the opening and closing of the valve.

[0033] Further, the linkage component includes a light bar fixedly connected to the bottom of the sliding seat, a rack fixedly connected to the bottom end of the light bar, and a gear fixedly sleeved outside the valve handle of the valve. When the sliding seat drives the rack to move downward and engage with the gear, it drives the valve handle to rotate, causing the valve to open. When the sliding seat drives the rack to move upward, it drives the valve handle to rotate in the opposite direction, driving the valve to close. A through hole is opened at the top of the base, and the through hole is used for passing the rack and the light bar.

[0034] Further, the cooling mechanism includes a mounting groove formed in the inner wall of the top of the base, an annular pipe installed inside the mounting groove, and a liquid inlet pipe connected to the annular pipe. The mounting groove is annular in structure and is located outside the lower mold cavity. The inner side of the annular pipe is provided with water spray nozzles. The other end of the liquid inlet pipe extends to the outside of the base and is connected to a supply device.

[0035] Further, the cleaning mechanism includes a plurality of connecting rods fixedly connected to the top of the movable plate and a scraping ring fixedly connected to the tops of the plurality of connecting rods. The scraping ring is sleeved outside the lower mold cavity.

[0036] An automotive interior part is prepared by using the above-mentioned forming process for an automotive interior part.

[0037] Compared with the prior art, the automotive interior part and its forming process provided by the present invention have the following beneficial effects:

[0038] 1. During the mold closing process, the release agent can be automatically obtained. After the mold is closed, the obtained release agent can be automatically sprayed into the mold cavity, with a high degree of automation, saving the step of manually applying the release agent to the inside of the mold cavity and further improving the injection molding efficiency;

[0039] 2. During the demolding process, the scraping ring can be driven to clean the outer wall of the lower mold cavity, effectively avoiding the problem that the outer side wall of the lower mold cavity is covered with scale and affecting its heat dissipation effect, and ensuring the continuous cooling effect on the lower mold cavity;

[0040] 3. During the demolding process, while driving the sliding seat and the upper mold cavity to move upward, the ejector rod is driven to move upward, thereby ejecting the molded injection plastic inside the lower mold cavity and improving the convenience of discharging the injection plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 2 It is a schematic diagram of the internal structure of the base of the present invention;

[0044] Figure 3 It is a schematic diagram of the structures of the automatic discharging mechanism, the cleaning mechanism, and the cooling mechanism of the present invention;

[0045] Figure 4 It is a schematic diagram of the internal structures of the sliding seat and the upper mold cavity of the present invention;

[0046] Figure 5 It is a partial structural schematic diagram of the automatic discharging mechanism and the injection mechanism of the present invention.

[0047] Description of reference numerals:

[0048] 1. Base; 2. Storage box; 3. Lower mold cavity; 4. Upper mold cavity; 5. Column; 6. Top plate; 7. Hydraulic cylinder; 8. Slide seat; 9. Injection pipe; 10. Extension ring; 11. Annular groove; 12. Slide rod; 13. Limit block; 14. Movable plate; 15. Ejector rod; 16. Sealing cylinder; 17. First piston; 18. Lifting rod; 19. First spring; 20. Transition cylinder; 21. Conduit; 22. Feed pipe; 23. Telescopic pipe; 24. Atomizing nozzle; 25. Second piston; 26. Second spring; 27. First non-return valve; 28. Second non-return valve; 29. ​​Valve; 30. Light strip; 31. Rack; 32. Gear; 33. Annular pipe; 34. Liquid inlet pipe; 35. Connecting rod; 36. Scraper ring; 37. Drain pipe. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] Example: See Figure 1 - Figure 5 , a molding process for automobile interior decoration parts, comprising the following steps:

[0051] S1. Raw material preparation: mixing the raw materials ABS and PC plastic particles into a mixed material according to the set weight proportions;

[0052] S2, material plasticization, heating and melting the mixed material through injection molding equipment;

[0053] S3, adding a release agent, and automatically spraying the release agent inside the mold cavity during the mold closing process;

[0054] S4, injection molding, after the upper and lower mold cavities are closed, plastic melt is injected into the mold cavity for filling, and then pressure is maintained and cooled to finalize the shape;

[0055] S5, demoulding and taking out materials, driving the two mold cavities to separate, and ejecting the formed interior decoration parts;

[0056] S6. Injection molding inspection: test the interior trim parts after molding.

[0057] The injection molding device includes a base 1, a material storage box 2 installed at the bottom of the base 1, a lower mold cavity 3 installed at the top of the base 1, and an upper mold cavity 4 arranged above the lower mold cavity 3. A drain pipe 37 is installed on one side of the bottom of the base 1 for discharging the coolant. The injection molding device also includes:

[0058] The mold clamping mechanism is installed on the top of the base 1 and is used to control the opening and closing of the upper mold cavity 4 and the lower mold cavity 3. Four columns 5 are installed on the top of the base 1, and a top plate 6 is installed at the top ends of the four columns 5. The mold clamping mechanism includes a hydraulic cylinder 7 installed inside the top plate 6 and a sliding seat 8 fixedly connected to the extending end of the hydraulic cylinder 7. The upper mold cavity 4 is installed at the bottom of the sliding seat 8, and a feeding pipe 9 is installed at the top of the upper mold cavity 4. The feeding pipe 9 is a telescopic structure, and the other end of the feeding pipe 9 is connected to an extrusion device;

[0059] By controlling the extension of the hydraulic cylinder 7, the sliding seat 8 is driven to move downward along the outer wall of the column 5, so that the upper mold cavity 4 and the lower mold cavity 3 are closed together. After the upper mold cavity 4 and the lower mold cavity 3 are closed, a release agent is sprayed into the upper mold cavity 4 and the lower mold cavity 3, and then the injection plastic is injected into the mold cavity through the feeding pipe 9.

[0060] An extension ring 10 with an annular structure is installed at the bottom of the upper mold cavity 4, and an annular groove 11 is formed at the top of the lower mold cavity 3. The extension ring 10 and the annular groove 11 are in agreement;

[0061] When the sliding seat 8 moves downward, the extension ring 10 first enters the annular groove 11, and then the upper mold cavity 4 and the lower mold cavity 3 are closed. Among them, when the extension ring 10 just enters the annular groove 11, the rack 31 starts to mesh with the gear 32. When the extension ring 10 completely enters the annular groove 11, the meshing transmission between the rack 31 and the gear 32 ends. Therefore, after the two mold cavities are hermetically connected, the valve 29 is opened to spray the release agent, thus preventing the problem that the atomizing nozzle 24 sprays the release agent outside the two mold cavities.

[0062] The automatic discharging mechanism is installed inside the base 1 and is connected to the mold clamping mechanism. It is used to drive the formed part in the lower mold cavity 3 to move out during the process of separating the upper mold cavity 4 from the lower mold cavity 3. The automatic discharging mechanism includes two sliding rods 12 fixedly connected to the bottom of the sliding seat 8, limit blocks 13 fixedly connected to the bottom ends of the two sliding rods 12 respectively, a movable plate 14 located on the top of the two limit blocks 13, a plurality of ejector rods 15 fixedly connected to the top of the movable plate 14, and a plurality of telescopic components installed at the bottom of the movable plate 14; the bottom ends of the sliding rods 12 extend into the base 1 and are slidably connected to the base 1; the movable plate 14 is located below the lower mold cavity 3, the top ends of the ejector rods 15 extend into the lower mold cavity 3 and are slidably connected to the lower mold cavity 3. The telescopic component includes a sealing cylinder 16 fixedly connected to the inner wall of the bottom of the base 1, a first piston 17 slidably connected inside the sealing cylinder 16, a lifting rod 18 fixedly connected to the top of the first piston 17, and a first spring 19 sleeved outside the sealing cylinder 16. The top end of the first spring 19 is fixedly connected to the bottom of the movable plate 14, and the bottom end of the first spring 19 is fixedly connected to the inner wall of the bottom of the base 1. Among them, the two sealing cylinders 16 are connected to the injection mechanism;

[0063] During the downward movement of the sliding seat 8 to merge the upper mold cavity 4 and the lower mold cavity 3, the limiting block 13 is driven to move downward synchronously by the sliding rod 12. After losing the bottom limit of the limiting block 13 on the movable plate 14, the movable plate 14 is driven to move downward by the resilience of the first spring 19, and then the ejector rods 15 are driven to move downward synchronously until the top ends of the ejector rods 15 are in the same plane as the bottom inside of the lower mold cavity 3.

[0064] After the injection plastic is cooled and formed, by driving the sliding seat 8 to move upward, the movable plate 14 is driven to move upward synchronously through the sliding rod 12 and the limiting block 13, and then the ejector rods 15 are driven to move upward synchronously to eject the injection plastic inside the lower mold cavity 3, improving the convenience of discharging the injection plastic.

[0065] The injection mechanism is installed inside the base 1 and there are two groups. The injection mechanism is respectively connected to the automatic discharging mechanism, the mold closing mechanism and the storage tank 2, and is used for automatically injecting the release agent into the upper mold cavity 4 and the lower mold cavity 3 after the upper mold cavity 4 and the lower mold cavity 3 are closed. The injection mechanism includes a transition cylinder 20 installed inside the base 1, a conduit 21 installed between the transition cylinder 20 and the sealing cylinder 16, a feed pipe 22 installed at the bottom of the sealing cylinder 16, a telescopic pipe 23 installed at the bottom of the sealing cylinder 16, an atomizing nozzle 24 installed on the inner wall of the top of the upper mold cavity 4, a second piston 25 installed inside the transition cylinder 20, and a second spring 26 installed on the top of the second piston 25. Since the injection plastic has a high density and high viscosity and the holes of the atomizing nozzle 24 are small, the injection plastic will not enter the inside of the atomizing nozzle 24; the top end of the telescopic pipe 23 extends into the sliding seat 8 and is connected to the atomizing nozzle 24; the top end of the second spring 26 is fixedly connected to the inner wall of the top of the transition cylinder 20; the bottom end of the feed pipe 22 extends into the storage tank 2, and a first one-way valve 27 is installed on the feed pipe 22; a second one-way valve 28 is installed on the conduit 21; a valve 29 is installed on the telescopic pipe 23; the injection mechanism further includes a linkage assembly for controlling the opening and closing of the valve 29. The linkage assembly includes a light bar 30 fixedly connected to the bottom of the sliding seat 8, a rack 31 fixedly connected to the bottom end of the light bar 30, and a gear 32 fixedly sleeved outside the valve handle of the valve 29. When the sliding seat 8 drives the rack 31 to move downward and engage with the gear 32, the valve handle is driven to rotate, causing the valve 29 to open. When the sliding seat 8 drives the rack 31 to move upward, the valve handle is driven to rotate in the opposite direction, driving the valve 29 to close. A perforation is opened at the top of the base 1 for passing the rack 31 and the light bar 30.

[0066] The setting of the first one-way valve 27 enables the release agent inside the storage tank 2 to enter the sealing cylinder 16 through the feed pipe 22, while the release agent inside the sealing cylinder 16 cannot be discharged through the feed pipe 22.

[0067] The second one-way valve 28 is provided so that the mold release agent in the sealing cylinder 16 can be discharged into the transition cylinder 20 through the conduit 21, while the mold release agent in the transition cylinder 20 cannot be discharged into the sealing cylinder 16 through the conduit 21;

[0068] When the slide 8 moves downward to merge the upper mold cavity 4 and the lower mold cavity 3, the limit block 13 is driven to move downward synchronously by the slide rod 12. After the limit block 13 loses the bottom limit of the movable plate 14, the lifting rod 18 is driven to move downward by the resilience of the first spring 19, thereby driving the first piston 17 to move downward, extruding the demoulding agent inside the sealing cylinder 16 into the interior of the transition cylinder 20, and pushing the second piston 25 to move upward, and the second spring 26 is compressed accordingly. When the slide 8 drives the rack 31 to move downward and mesh with the gear 32, the valve handle is driven to rotate to open the valve 29. At this time, the rebound force of the second spring 26 drives the second piston 25 to move downward along the inner wall of the transition cylinder 20, and the demoulding agent inside the transition cylinder 20 is sprayed out through the telescopic tube 23 and the atomizing nozzle 24, so that the demoulding agent is sprayed on the inner walls of the upper mold cavity 4 and the lower mold cavity 3, so as to facilitate subsequent demoulding;

[0069] After the injection molding material is cooled and formed, the slide 8 is driven to move upward, and the engagement between the rack 31 and the gear 32 drives the valve handle to rotate in the opposite direction to close the valve 29. At the same time, when the slide 8 moves upward, it moves upward synchronously through the slide rod 12 and the limit block 13, and drives the lifting rod 18 and the movable plate 14 to move upward through the rebound force of the first spring 19. In this process, the first piston 17 moves upward synchronously and draws the release agent inside the storage box 2 into the sealing cylinder 16 through the feed pipe 22.

[0070] A cooling mechanism is installed inside the base 1 and is used to cool the injection molding material inside the upper mold cavity 4 and the lower mold cavity 3. The cooling mechanism includes a mounting groove provided on the inner wall of the top of the base 1, an annular tube 33 installed inside the mounting groove, and a liquid inlet tube 34 connected to the annular tube 33. The mounting groove is an annular structure and is located outside the lower mold cavity 3. A water spray port is provided inside the annular tube 33. The other end of the liquid inlet tube 34 extends to the outside of the base 1 and is connected to the supply device.

[0071] After the mold is closed and the material is injected, coolant is injected into the annular tube 33 through the supply device and the liquid inlet pipe 34. The coolant flows out through each water nozzle to the outer surface of the lower mold cavity 3 and flows downward along the outer surface. The heat inside the lower mold cavity 3 is taken away by the continuous coolant, thereby accelerating the cooling and molding of the injection molding material.

[0072] A cleaning mechanism is installed inside the base 1 and is connected to the automatic discharging mechanism. It is used to clean the side wall of the lower die cavity 3 during the process of separating the upper die cavity 4 and the lower die cavity 3. The cleaning mechanism includes a plurality of connecting rods 35 fixedly connected to the top of the movable plate 14 and a scraping ring 36 fixedly connected to the tops of the plurality of connecting rods 35. The scraping ring 36 is sleeved outside the lower die cavity 3.

[0073] During the cooling process of the lower die cavity 3, the injection molding material is cooled and formed by circulating coolant through the outer wall of the lower die cavity 3 to take away the internal heat. However, scale is likely to form in the places where the coolant passes for a long time. The existence of scale will affect the heat dissipation efficiency of the lower die cavity 3. Therefore, in this embodiment, after the injection molding material is cooled and formed, the slide seat 8 is driven to move upward, and then the movable plate 14 is driven to move upward synchronously through the slide rod 12 and the limit block 13. During this process, the scraping ring 36 is driven by the connecting rod 35 to move upward along the outer wall of the lower die cavity 3, effectively avoiding the problem of scale on the outer side wall of the lower die cavity 3 and ensuring the continuous cooling effect on the lower die cavity 3.

[0074] An automotive interior part is prepared by using the above-mentioned automotive interior part forming process.

[0075] Working principle: When in use, by controlling the extension of the hydraulic cylinder 7, the sliding seat 8 is driven to move downward along the outer wall of the column 5. The limiting block 13 is driven to move downward synchronously through the sliding rod 12. After the limiting block 13 loses the bottom limit of the movable plate 14, the movable plate 14 is driven to move downward by the resilience of the first spring 19, and then drives each ejector rod 15 to move downward synchronously until the top end of the ejector rod 15 is in the same plane as the inside of the bottom of the lower die cavity 3. At the same time, the lifting rod 18 is driven to move downward, thereby driving the first piston 17 to move downward, extruding the demolding agent inside the sealing cylinder 16 into the transition cylinder 20, and pushing the second piston 25 upward. The second spring 26 is compressed accordingly. When the sliding seat 8 drives the rack 31 to move downward and engage with the gear 32, the valve handle is driven to rotate, opening the valve 29. At this time, driven by the resilience of the second spring 26, the second piston 25 moves downward along the inner wall of the transition cylinder 20, spraying the demolding agent inside the transition cylinder 20 through the telescopic pipe 23 and the atomizing nozzle 24, so that the inner walls of the upper die cavity 4 and the lower die cavity 3 are sprayed with the demolding agent for subsequent demolding. Then, the injection plastic is injected into the die cavity through the injection pipe 9, and the injection plastic inside the die cavity is cooled by the cooling mechanism. After the injection plastic is cooled and formed, the hydraulic cylinder 7 is controlled to drive the sliding seat 8, the sliding rod 12 and the upper die cavity 4 to move upward. The movable plate 14 is driven to move upward synchronously through the limiting block 13, and then drives each ejector rod 15 to move upward synchronously to eject the injection plastic inside the lower die cavity 3. In this process, the scraping ring 36 is driven to move upward along the outer wall of the lower die cavity 3 through the connecting rod 35, effectively avoiding the problem of scale on the outer side wall of the lower die cavity 3 and ensuring the continuous cooling effect on the lower die cavity 3.

[0076] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. On the basis of this design principle, the settings of the power mechanism, power supply system, control system, etc. of the device are not fully described. However, on the premise that those skilled in the art understand the principle of the above invention, the specific power mechanism, power supply system and control system can be clearly known. The control mode of the application document is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming of those skilled in the art; only some exemplary embodiments of the present invention are described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0078] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A molding process for automobile interior decoration parts, characterized in that: The steps include: S1. Raw material preparation: mixing the raw materials ABS and PC plastic particles into a mixed material according to the set weight proportions; S2, material plasticization, heating and melting the mixed material through injection molding equipment; S3, adding a release agent, and automatically spraying the release agent inside the mold cavity during the mold closing process; S4, injection molding, after the upper and lower mold cavities are closed, plastic melt is injected into the mold cavity for filling, and then pressure is maintained and cooled to finalize the shape; S5, demoulding and taking out materials, driving the two mold cavities to separate, and ejecting the formed interior decoration parts; S6, injection molding inspection, testing of the interior trim parts after molding.

2. The automotive interior trim molding process according to claim 1, characterized in that: The injection molding device comprises a base (1), a material storage box (2) installed at the bottom of the base (1), a lower mold cavity (3) installed at the top of the base (1), and an upper mold cavity (4) arranged above the lower mold cavity (3), and the injection molding device also comprises: A mold clamping mechanism, which is mounted on the top of the base (1) and is used to control the opening and closing of the upper mold cavity (4) and the lower mold cavity (3); An automatic discharge mechanism, which is installed inside the base (1) and connected to the mold clamping mechanism, and is used to drive the molded part in the lower mold cavity (3) to be removed during the process of controlling the upper mold cavity (4) to separate from the lower mold cavity (3); An injection mechanism is installed inside the base (1) and is provided with two groups. The injection mechanism is respectively connected to the automatic discharge mechanism, the mold closing mechanism and the material storage box (2) and is used to automatically inject a release agent into the upper mold cavity (4) and the lower mold cavity (3) after the upper mold cavity (4) and the lower mold cavity (3) are closed. A cooling mechanism, which is installed inside the base (1) and is used to cool the injection molding material inside the upper mold cavity (4) and the lower mold cavity (3); A cleaning mechanism is installed inside the base (1) and connected to the automatic discharge mechanism, and is used to clean the side wall of the lower mold cavity (3) during the process of separating the upper mold cavity (4) and the lower mold cavity (3).

3. The automotive interior trim molding process according to claim 2, characterized in that: Four columns (5) are installed on the top of the base (1), and top plates (6) are installed on the top ends of the four columns (5).

4. The automotive interior trim molding process according to claim 3, characterized in that: The mold clamping mechanism comprises a hydraulic cylinder (7) installed inside the top plate (6) and a slide seat (8) fixed to the extended end of the hydraulic cylinder (7); the upper mold cavity (4) is installed at the bottom of the slide seat (8); an injection pipe (9) is installed on the top of the upper mold cavity (4); the injection pipe (9) is a retractable structure; the other end of the injection pipe (9) is connected to the extrusion equipment; An extension ring (10) of an annular structure is installed at the bottom of the upper mold cavity (4), and an annular groove (11) is opened at the top of the lower mold cavity (3), and the extension ring (10) and the annular groove (11) are consistent with each other.

5. The automotive interior trim molding process according to claim 4, characterized in that: The automatic discharging mechanism comprises two slide bars (12) fixedly connected to the bottom of the slide seat (8), limit blocks (13) respectively fixedly connected to the bottom ends of the two slide bars (12), a movable plate (14) located on the top of the two limit blocks (13), a plurality of ejector rods (15) fixedly connected to the top of the movable plate (14), and a plurality of telescopic components installed at the bottom of the movable plate (14); The bottom end of the sliding rod (12) extends to the inside of the base (1) and is slidably connected to the base (1); The movable plate (14) is located below the lower mold cavity (3), and the top end of the ejector rod (15) extends to the interior of the lower mold cavity (3) and is in sliding connection with the lower mold cavity (3); The telescopic assembly comprises a sealing cylinder (16) fixedly connected to the inner wall of the bottom of the base (1), a first piston (17) slidably connected to the inside of the sealing cylinder (16), a lifting rod (18) fixedly connected to the top of the first piston (17), and a first spring (19) sleeved on the outside of the sealing cylinder (16), wherein the top end of the first spring (19) is fixedly connected to the bottom of the movable plate (14), and the bottom end of the first spring (19) is fixedly connected to the inner wall of the bottom of the base (1), wherein the two sealing cylinders (16) are connected to the injection mechanism.

6. The automotive interior trim molding process according to claim 5, characterized in that: The injection mechanism comprises a transition tube (20) installed inside the base (1), a guide tube (21) installed between the transition tube (20) and the sealing tube (16), a feed pipe (22) installed at the bottom of the sealing tube (16), a telescopic tube (23) installed at the bottom of the sealing tube (16), an atomizing nozzle (24) installed on the top inner wall of the upper mold cavity (4), a second piston (25) installed inside the transition tube (20), and a second spring (26) installed on the top of the second piston (25); The top end of the telescopic tube (23) extends to the interior of the slide seat (8) and is connected to the atomizing nozzle (24); The top end of the second spring (26) is fixedly connected to the inner wall of the top of the transition tube (20); The bottom end of the feed pipe (22) extends to the interior of the storage box (2), and a first one-way valve (27) is installed on the feed pipe (22); A second one-way valve (28) is installed on the conduit (21); A valve (29) is installed on the telescopic tube (23); The injection mechanism also includes a linkage assembly for controlling the opening and closing of the valve (29).

7. The automotive interior trim molding process according to claim 6, characterized in that: The linkage assembly comprises a light bar (30) fixedly connected to the bottom of the slide (8), a rack (31) fixedly connected to the bottom end of the light bar (30), and a gear (32) fixedly sleeved on the outside of the valve handle of the valve (29). When the slide (8) drives the rack (31) to move downward and mesh with the gear (32), the valve handle is driven to rotate, so that the valve (29) is opened. When the slide (8) drives the rack (31) to move upward, the valve handle is driven to rotate in the opposite direction, so that the valve (29) is closed. A through hole is opened on the top of the base (1), and the through hole is used to pass the rack (31) and the light bar (30).

8. The automotive interior trim molding process according to claim 7, characterized in that: The cooling mechanism comprises a mounting groove provided on the top inner wall of the base (1), an annular tube (33) installed inside the mounting groove, and a liquid inlet tube (34) connected to the annular tube (33); the mounting groove is an annular structure and is located outside the lower mold cavity (3); a water spray port is provided on the inner side of the annular tube (33); the other end of the liquid inlet tube (34) extends to the outside of the base (1) and is connected to a supply device.

9. The automotive interior trim molding process according to claim 8, characterized in that: The cleaning mechanism comprises a plurality of connecting rods (35) fixedly connected to the top of the movable plate (14) and a scraper ring (36) fixedly connected to the top of the plurality of connecting rods (35), and the scraper ring (36) is sleeved on the outside of the lower mold cavity (3).

10. An automotive interior decoration part, characterized in that: It is prepared by adopting the automobile interior decoration part molding process as claimed in claim 9.

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