Injection mold and injection molding method for automobile polymer interior trim part

Abstract

The invention provides an injection mold for an automobile polymer interior trim part, and relates to the field of polymer material processing. The device comprises a workbench and a tank body, the upper surface of the workbench is connected with a forming box, the bottom surface of the workbench is connected with an air bellow, the bottom surface of the air bellow is connected with a fan, the bottom surface of the fan is connected with a first motor, the inner wall of the forming box is connected with a baffle, the inner wall of the forming box is connected with an electric push rod, and the output end of the electric push rod is connected with a supporting plate; the device has the beneficial effects that liquid can be effectively prevented from flowing into a hole to cause blockage in the injection molding process through the design of an electric push rod and a baffle, the smoothness of an air duct is ensured, then a first motor drives a fan to generate air pressure, and through the cooperation of an air bellow and an air outlet pipe, the air pressure is generated at the bottom of a molding box to blow out an interior trim part subjected to injection molding; and the mold needs to be slowly taken out through the edge during manual demolding, and the bottom is easy to adhere too tightly, so that the mold is difficult to take out.

Description

Technical Field

[0001] The present invention relates to the field of polymer material processing, and specifically to an injection mold and an injection method for automotive polymer interior parts. Background Art

[0002] An automobile is a means of transportation, mainly composed of parts such as an engine, a chassis, a body, and electrical equipment. Its main function is to transport people or goods from one place to another. However, with the increase in the number of automobiles, some problems have also arisen, such as traffic congestion, air pollution, etc., so it is necessary to use and manage them reasonably.

[0003] The patent with the publication number CN214419400U discloses a technical solution that "an injection mold for forming a polymer material that is easy to melt, which relates to the technical field of polymer material equipment. It includes a mold body and a placement box. The mold body is located in the placement box and is hinged to the placement box. An injection port is opened on one side of the mold body. A spiral tube is connected to the side of the injection port away from the mold body. An installation tube is sleeved at one end of the spiral tube away from the mold body. The installation tube is connected through a connection mechanism. The connection mechanism includes a first sleeve and a second sleeve. The first sleeve and the second sleeve are fixed by bolts. By splicing the provided installation tube, it is convenient to clean the installation tube when injecting different materials. The provided first sleeve and second sleeve fix the provided installation tube, making the disassembly and fixation of the installation tube more convenient.", achieving the technical effect of "thus solving the problem that when different materials are needed, it is inconvenient to clean the auger in the injection molding machine, resulting in poor mold casting effect".

[0004] However, after the mold injection is completed and cooled, demolding is required. But for manual demolding, the mold needs to be slowly taken out through the edge. However, after the polymer melts and forms, it is easily adhered too tightly at the bottom, making it very difficult to take out the mold. For this reason, we propose an injection mold for automotive polymer interior parts to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an injection mold and an injection method for automotive polymer interior parts to solve the problems raised in the background art above and overcome the existing technical defects.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: an injection mold for automotive polymer interior parts, including a workbench and a tank body. The upper surface of the workbench is connected with a forming box, the bottom surface of the workbench is connected with an air box, the bottom surface of the air box is connected with a fan, the bottom surface of the fan is connected with a first motor, the inner wall of the forming box is connected with a baffle, two holes are opened on the outer surface of the baffle, the inner wall of the forming box is connected with an electric push rod, the output end of the electric push rod is connected with a support plate, the upper surface of the support plate is in contact with the bottom surface of the baffle, and air outlet pipes are connected to both the left and right sides of the air box. One ends of the two air outlet pipes away from the air box sequentially penetrate the outer walls of the workbench and the forming box and are communicated with the inside.

[0007] An injection mold and injection method for automotive polymer interior parts, including

[0008] Step S1: Inject the material into the tank body and drive the rotating shaft to stir the material;

[0009] After the material stirring is completed, input it into the forming box through the feeding pipe, and drive the stamping box to work to mold the material in the forming box;

[0010] Step S3: Carry out water liquid replacement type water cooling on the cooling cavity through the cooperation of the water inlet pipe and the water outlet pipe;

[0011] Step S4: Open the holes in the baffle to make the inside and outside of the forming box ventilated and air-cooled.

[0012] As a further scheme of the present invention: a support frame is connected to the upper surface of the workbench, and a cylinder is installed on the upper surface of the support frame.

[0013] As a further scheme of the present invention: the output end of the cylinder is connected with a connecting plate, and a plurality of damping rods are slidably connected to the inner wall of the connecting plate. A buffer spring is sleeved on the outer surface of each damping rod.

[0014] As a further scheme of the present invention: the bottoms of the plurality of damping rods are commonly connected with a stamping box, and a cooling cavity is opened in the inner wall of the stamping box.

[0015] As a further scheme of the present invention: a water inlet pipe is connected to the upper surface of the stamping box, and a water outlet pipe is connected to the upper surface of the stamping box.

[0016] As a further scheme of the present invention: a support ring is sleeved on the outer surface of the tank body, a group of fixing rods are installed on the bottom surface of the support ring, a feeding pipe is connected to the bottom surface of the tank body, a control valve is installed on the outer surface of the feeding pipe, and a feeding port is opened on the upper surface of the tank body.

[0017] As a further solution of the present invention: a second motor is connected to the upper surface of the tank body, a rotating shaft is connected to the inner wall of the tank body, the output end of the second motor penetrates the outer wall of the tank body and is fixedly connected to one end of the rotating shaft, and a group of stirring rods are installed on the outer surface of the rotating shaft.

[0018] As a further solution of the present invention: a control panel is connected to the front surface of the workbench, and a group of support legs are installed on the bottom surface of the workbench.

[0019] As a further solution of the present invention: it further includes a temperature sensing device, the temperature sensing device is fixedly installed inside the baffle, the temperature sensing device includes a temperature sensing module, a signal conditioning module, a multi-channel data transmission module and a distributed power supply module, the temperature sensing module includes a high-temperature resistant sensor element, a sealed protective housing and a high thermal conductivity interface layer, the outer layer is coated with a high-temperature alloy or ceramic material and is in direct contact with the baffle, the temperature sensing module is electrically connected to the multi-channel data transmission module through the signal conditioning module, the distributed power supply module is electrically connected to the overall temperature sensing device, the high-temperature resistant sensor element is made with a platinum thin film RTD array as the core, and a aluminum nitride insulating layer is sputtered on the surface of the platinum thin film RTD array, and its temperature measurement range is -200°C to 850°C.

[0020] Compared with the prior art, the beneficial effects of the present invention include:

[0021] Through the design of the electric push rod and the baffle, it can effectively prevent the liquid from flowing into the holes during the injection molding process and causing blockage, ensuring the smoothness of the air duct. Then, the first motor drives the fan to generate wind pressure, and through the cooperation of the air box and the air outlet pipe, wind pressure is generated at the bottom of the forming box to blow out the interior trim parts that have completed injection molding, thus avoiding the problem that after the mold injection molding is completed and cooled, demolding is required, but for manual demolding, the mold needs to be taken out slowly from the edge, but after the polymer melts and forms, it is easy to adhere too tightly to the bottom, making it difficult to take out the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The disclosure of the present invention will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0023] Figure 1 Schematically shows a front view structural diagram of an injection mold for automotive polymer interior trim parts according to an embodiment of the present invention;

[0024] Figure 2 Schematically shows a front sectional structural diagram of an injection mold for automotive polymer interior trim parts according to an embodiment of the present invention;

[0025] Figure 3 Schematically shows a schematic cross-sectional structure diagram of the upper part of an injection mold for automotive polymer interior parts proposed according to an embodiment of the present invention;

[0026] Figure 4 Schematically shows the Figure 1 schematic structure diagram of part A in an injection mold for automotive polymer interior parts proposed according to an embodiment of the present invention;

[0027] Reference numerals in the figure: 1, workbench; 2, support leg; 3, air outlet pipe; 4, air box; 5, connecting plate; 6, control board; 7, fixing rod; 8, control valve; 9, support ring; 10, tank body; 11, second motor; 12, forming box; 13, stamping box; 14, cooling cavity; 15, fan; 16, first motor; 17, baffle; 18, feeding pipe; 19, stirring rod; 20, rotating shaft; 21, water inlet pipe; 22, cylinder; 23, support frame; 24, water outlet pipe; 25, electric push rod; 26, support plate; 27, buffer spring; 28, damping rod. Detailed implementation manners

[0028] It is easy to understand that according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can propose various interchangeable structural ways and implementation manners. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0029] Shown in combination with the accompanying drawings according to an embodiment of the present invention.

[0030] An injection mold for automotive polymer interior parts includes a workbench 1 and a tank body 10. The upper surface of the workbench 1 is connected with a forming box 12, the bottom surface of the workbench 1 is connected with an air box 4, the bottom surface of the air box 4 is connected with a fan 15, the bottom surface of the fan 15 is connected with a first motor 16, the inner wall of the forming box 12 is connected with a baffle 17, two holes are opened on the outer surface of the baffle 17, the inner wall of the forming box 12 is connected with an electric push rod 25, the output end of the electric push rod 25 is connected with a support plate 26, the upper surface of the support plate 26 is in contact with the bottom surface of the baffle 17, and both the left and right sides of the air box 4 are connected with air outlet pipes 3. One ends of the two air outlet pipes 3 far away from the air box 4 sequentially penetrate through the outer walls of the workbench 1 and the forming box 12 and are communicated with the inside.

[0031] An injection mold for automotive polymer interior parts and an injection method, including

[0032] Step S1: Inject the material into the tank body 10 and drive the rotating shaft 20 to stir the material;

[0033] Step S2: After the material stirring is completed, it is input into the molding box 12 through the feeding pipe 18, and the stamping box 13 is driven to work to mold the material in the molding box 12;

[0034] Step S3: The cooling cavity 14 is cooled by water replacement through the cooperation of the water inlet pipe 21 and the water outlet pipe 24;

[0035] Step S4: The air inside and outside the molding box 12 is ventilated and air-cooled by opening the holes in the baffle 17.

[0036] In this embodiment, the upper surface of the workbench 1 is connected with a support frame 23, and the upper surface of the support frame 23 is provided with a cylinder 22. The cylinder 22 can provide stable power to ensure that the opening and closing actions of the mold are precise and consistent, thereby ensuring the dimensional accuracy and consistency of the molded interior parts.

[0037] In this embodiment, the output end of the cylinder 22 is connected with a connecting plate 5. A plurality of damping rods 28 are slidably connected to the inner wall of the connecting plate 5. A buffer spring 27 is sleeved on the outer surface of each damping rod 28. The combination of the damping rod 28 and the buffer spring 27 can provide a smooth damping effect to ensure the smoothness during the movement of the mold and avoid the vibration caused by sudden acceleration or deceleration.

[0038] In this embodiment, the bottoms of the plurality of damping rods 28 are commonly connected with a stamping box 13. A cooling cavity 14 is formed in the inner wall of the stamping box 13. The presence of the cooling cavity 14 allows the cooling medium to circulate through, thereby uniformly cooling the mold. This helps to control the mold temperature and improve the product quality.

[0039] In this embodiment, the water inlet pipe 21 is connected to the upper surface of the stamping box 13, and the water outlet pipe 24 is connected to the upper surface of the stamping box 13. The water inlet pipe 21 and the water outlet pipe 24 allow the cooling medium to enter and leave the cooling cavity 14, thereby realizing effective circulating cooling and keeping the mold temperature stable.

[0040] In this embodiment, a support ring 9 is sleeved on the outer surface of the tank body 10. A group of fixing rods 7 are installed on the bottom surface of the support ring 9. The bottom surface of the tank body 10 is connected with a feeding pipe 18. A control valve 8 is installed on the outer surface of the feeding pipe 18. The combination of the feeding pipe 18 and the control valve 8 can realize precise control of material conveying to ensure the uniform supply of materials during the injection molding process. An inlet port is formed on the upper surface of the tank body 10.

[0041] In this embodiment, a second motor 11 is connected to the upper surface of the tank body 10. A rotating shaft 20 is connected to the inner wall of the tank body 10. The output end of the second motor 11 penetrates through the outer wall of the tank body 10 and is fixedly connected to one end of the rotating shaft 20. A group of stirring rods 19 are installed on the outer surface of the rotating shaft 20. The stirring rods 19 rotate driven by the second motor 11, which can effectively stir the materials in the tank body 10 to ensure uniform mixing of the materials and improve the quality of the injection molded products.

[0042] In this embodiment, a control panel 6 is connected to the front of the workbench 1, and a set of support legs 2 are installed on the bottom surface of the workbench 1. The support legs 2 can provide stable support to ensure that the workbench 1 does not shake or tilt during the injection molding process, guaranteeing the injection molding accuracy.

[0043] In this embodiment, a temperature sensing device is further included. The temperature sensing device is fixedly installed inside the baffle 17. The temperature sensing device includes a temperature sensing module, a signal conditioning module, a multi-channel data transmission module, and a distributed power supply module. The temperature sensing module includes a high-temperature resistant sensor element, a sealed protection housing, and a high thermal conductivity interface layer. The outer layer is coated with a high-temperature alloy or ceramic material and is in direct contact with the baffle 17. The temperature sensing module is electrically connected to the multi-channel data transmission module through the signal conditioning module, and the distributed power supply module is electrically connected to the entire temperature sensing device. Therefore, direct and accurate temperature detection can be carried out during the injection molding production of the mold to observe whether there is a phenomenon of melting or boiling in the injection mold, ensuring the ex-factory quality. At the same time, the high-temperature resistant sensor element is made with a platinum thin film RTD array as the core, and an aluminum nitride insulating layer is sputtered on the surface of the platinum thin film RTD array. Its temperature measurement range is -200°C to 850°C. Therefore, the injection mold can perform accurate temperature detection in a high range and multiple ranges, ensuring that the injection molding operation can proceed normally.

[0044] Working principle: First, the staff injects the material into the tank body 10 through the feed port. Subsequently, the second motor 11 drives the rotating shaft 20 to rotate, and then drives the stirring rod 19 to rotate, thereby ensuring that the material can be evenly stirred. Then, through the cooperation of the control valve 8 and the feed pipe 18, the material is evenly injected into the forming box 12. Then, the cylinder 22 drives the punching box 13 to slide downward, and through the cooperation of the damping rod 28 and the buffer spring 27, a certain buffering effect is achieved during the pressing and forming process. Subsequently, through the cooperation of the water inlet pipe 21 and the water outlet pipe 24, cooling water is injected into and output from the cooling cavity 14 to ensure that the interior trim parts can be quickly cooled. Finally, the electric push rod 25 drives the support plate 26 to open the holes on the baffle 17, so that the air flow can enter the forming box 12 through the holes, avoiding the blockage caused by the liquid flowing into the holes during the injection molding process. Then, the first motor 16 drives the fan 15 to generate wind pressure, and through the cooperation of the air box 4 and the air outlet pipe 3, wind pressure is generated at the bottom of the forming box 12 to blow out the interior trim parts that have completed the injection molding, thus avoiding the problem that after the mold injection molding is completed and cooled, demolding is required, but for manual demolding, the mold needs to be slowly taken out from the edge, but after the polymer melts and forms, it is easily adhered too tightly to the bottom, making it difficult to take out the mold.

[0045] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An injection mold for a polymer interior part of an automobile, characterized in that, It includes a workbench (1) and a tank body (10). The upper surface of the workbench (1) is connected with a forming box (12). The bottom surface of the workbench (1) is connected with an air box (4). The bottom surface of the air box (4) is connected with a fan (15). The bottom surface of the fan (15) is connected with a first motor (16). The inner wall of the forming box (12) is connected with a baffle (17). Two holes are opened on the outer surface of the baffle (17). The inner wall of the forming box (12) is connected with an electric push rod (25). The output end of the electric push rod (25) is connected with a support plate (26). The upper surface of the support plate (26) is in contact with the bottom surface of the baffle (17). The left and right sides of the air box (4) are both connected with air outlet pipes (3). One ends of the two air outlet pipes (3) far away from the air box (4) sequentially penetrate through the outer walls of the workbench (1) and the forming box (12) and are communicated with the inside.

2. The injection mold for a polymer automotive interior part according to claim 1, characterized in that, The upper surface of the workbench (1) is connected with a support frame (23). The upper surface of the support frame (23) is provided with a cylinder (22).

3. The injection mold for a polymer interior part of an automobile according to claim 2, characterized in that, The output end of the cylinder (22) is connected with a connecting plate (5). A plurality of damping rods (28) are slidably connected to the inner wall of the connecting plate (5). A buffer spring (27) is sleeved on the outer surface of each damping rod (28).

4. The injection mold for a polymer interior part of an automobile according to claim 3, wherein, The bottom ends of the plurality of damping rods (28) are jointly connected with a stamping box (13). A cooling cavity (14) is opened on the inner wall of the stamping box (13).

5. The injection mold for a polymer interior part of an automobile according to claim 4, characterized in that, The upper surface of the stamping box (13) is connected with a water inlet pipe (21). The upper surface of the stamping box (13) is connected with a water outlet pipe (24).

6. The injection mold for a polymer interior part of an automobile according to claim 1, characterized in that, A support ring (9) is sleeved on the outer surface of the tank body (10). A group of fixing rods (7) are installed on the bottom surface of the support ring (9). The bottom surface of the tank body (10) is connected with a feeding pipe (18). A control valve (8) is installed on the outer surface of the feeding pipe (18). A feeding port is opened on the upper surface of the tank body (10).

7. The injection mold for a polymer interior part of an automobile according to claim 1, characterized in that, The upper surface of the tank body (10) is connected with a second motor (11). The inner wall of the tank body (10) is connected with a rotating shaft (20). The output end of the second motor (11) penetrates through the outer wall of the tank body (10) and is fixedly connected with one end of the rotating shaft (20). A group of stirring rods (19) are installed on the outer surface of the rotating shaft (20).

8. An injection mold for a polymer interior part of an automobile according to claim 1, characterized in that, The front surface of the workbench (1) is connected with a control panel (6). A group of support legs (2) are installed on the bottom surface of the workbench (1).

9. The injection mold for a polymer interior part of an automobile according to claim 1, characterized in that, It also includes a temperature sensing device, which is fixedly installed inside the baffle (17). The temperature sensing device includes a temperature sensing module, a signal conditioning module, a multi-channel data transmission module, and a distributed power supply module. The temperature sensing module includes a high-temperature resistant sensor element, a sealed protection housing, and a high thermal conductivity interface layer. The outer layer is coated with a high-temperature alloy or ceramic material and is in direct contact with the baffle (17). The temperature sensing module is electrically connected to the multi-channel data transmission module through the signal conditioning module. The distributed power supply module is electrically connected to the entire temperature sensing device. The high-temperature resistant sensor element is made with a platinum thin film RTD array as the core, and an aluminum nitride insulating layer is sputtered on the surface of the platinum thin film RTD array. Its temperature measurement range is -200°C to 850°C.

10. The injection mold and injection method for a polymer interior part of an automobile according to claim 1, characterized in that, including Step S1: Inject the material into the tank body (10) and drive the rotating shaft (20) to stir the material; Step S2: After the material stirring is completed, input it into the molding box (12) through the feeding pipe (18), and drive the stamping box (13) to work to mold the material in the molding box (12); Step S3: Carry out water liquid replacement type water cooling on the cooling cavity (14) through the cooperation of the water inlet pipe (21) and the water outlet pipe (24); Step S4: Open the holes in the baffle (17) to allow air to circulate inside and outside the molding box (12) for air cooling.

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