An apparatus and method for injection molding and surface texturing of automotive interior parts.

Abstract

This invention discloses an injection molding and surface texture processing device and method for automotive interior parts, belonging to the technical field of texture processing devices. It includes a processing base, on which a vacuum chamber is fixedly mounted. A vacuum pump is installed below the vacuum chamber. A vacuum cavity connected to the vacuum pump is formed inside the vacuum chamber. An isolation plate is fixedly connected inside the vacuum cavity, and multiple vent holes communicating with the vacuum cavity are formed on the isolation plate. Clamping blocks are provided on the left and right inner walls of the vacuum cavity, and card seats are fixedly connected to the front and rear inner walls of the vacuum cavity. A gravity-triggered workpiece positioning confirmation and anti-misoperation structure, composed of a positioning slider, a return spring, and a guide pin, improves processing efficiency and ensures processing quality. Simultaneously, the flexible clamping claws can be quickly replaced to adapt to different specifications of automotive interior parts, improving the versatility and processing efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of texture processing equipment, and in particular to an injection molding and surface texture processing device and method for automotive interior parts. Background Technology

[0002] The injection molding and surface texturing equipment for automotive interior parts is a core piece of equipment in the automotive interior parts manufacturing process. Its core function is to accurately position, stably clamp, and process the surface texture of the automotive interior parts blanks after injection molding and pressure holding. This ensures that the processed interior parts meet the required texture accuracy, have no damage to their appearance, and are free from warping or deformation. At the same time, it is adapted to the needs of large-scale, continuous, and automated production of automotive interior parts of different specifications, providing qualified interior products that meet the appearance and precision requirements for subsequent assembly, quality inspection, and other deep processing processes.

[0003] When using existing equipment for injection molding and surface texturing of automotive interior parts: there is a lack of a workpiece positioning confirmation structure, so processing can still start even if the workpiece is not in the correct position, which will affect the processing quality; workpiece clamping requires repeated manual alignment and adjustment, resulting in low clamping efficiency; existing clamping structures are mostly fixed designs, which cannot be quickly changed and adapted to different specifications of interior parts, resulting in poor equipment versatility.

[0004] Therefore, an injection molding and surface texturing apparatus for automotive interior parts is provided to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background art and to provide an injection molding and surface texturing device for automotive interior parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An injection molding and surface texturing device for automotive interior parts includes a processing base, a vacuum chamber fixedly mounted on the processing base, a vacuum pump mounted below the vacuum chamber, a vacuum cavity connected to the vacuum pump inside the vacuum chamber, an isolation plate fixedly connected inside the vacuum cavity, a plurality of vent holes connected to the vacuum cavity on the isolation plate, clamping blocks provided on the left and right inner walls of the vacuum cavity, and card seats fixedly connected to the front and rear inner walls of the vacuum cavity, each card seat having a card slot, a flexible clamping claw engaging in the card slot, an installation groove having a center of the flexible clamping claw, and a pressing top block fixedly mounted in the installation groove.

[0007] To achieve gravity-triggered positioning, preferably, a sliding mounting groove is provided in the center of the isolation plate, a positioning slider is slidably mounted in the sliding mounting groove, a return spring is fixedly mounted in the inner bottom of the sliding mounting groove, and the other end of the return spring is fixedly connected to the bottom surface of the positioning slider.

[0008] To ensure the guidance of the positioning slider during its sliding process, preferably, a guide pin is fixedly connected to the bottom of the positioning slider, a guide groove adapted to the guide pin is opened at the bottom of the sliding mounting groove, the reset spring is sleeved on the outside of the guide pin, and the guide pin slides in cooperation with the guide groove.

[0009] To achieve workpiece positioning and fixation, preferably, the clamping end face of the clamping block and the clamping end of the flexible clamping claw are at the same horizontal height, and the clamping direction of the pressing top block is perpendicular to the extension direction of the lateral telescopic clamping block.

[0010] To ensure vacuum adsorption on the bottom surface of the workpiece, preferably, the vent holes are evenly distributed in an array on the isolation plate with the sliding mounting groove as the center, and the vent holes are connected to the inner cavity of the vacuum chamber.

[0011] To achieve automatic triggering of workpiece positioning and switching between processing states, preferably, the top surface of the positioning slider is higher than the bearing surface of the isolation plate under normal conditions, and the lower end of the guide pin is located above the opening of the guide groove. When the interior trim to be processed is placed on the isolation plate, the gravity of the interior trim presses the positioning slider to compress the reset spring and slide downwards. The guide pin slides down synchronously with the positioning slider and extends into the guide groove. When the positioning slider slides down to the point where its top surface is flush with the bearing surface of the isolation plate, the guide pin is fully extended into the guide groove, and the device enters the processing preparation state.

[0012] A method for injection molding and surface texturing of automotive interior parts, employing the aforementioned apparatus for injection molding and surface texturing of automotive interior parts, is characterized by comprising the following steps: Place the interior trim piece to be processed on the bearing surface of the partition plate. Use the gravity of the interior trim piece to press the positioning slider down and compress the return spring until the top surface of the positioning slider is flush with the bearing surface of the partition plate. Then the workpiece is determined to be in place and enters the processing state. The interior trim is mechanically clamped in four directions by the clamping blocks on the left and right sides and the pressing top blocks on the front and rear sides. At the same time, the vacuum pump is started to evacuate the vacuum chamber, and the interior trim is adsorbed and fixed through the vent holes on the isolation plate. After the surface texture treatment is completed, the vacuum pump is turned off to release the adsorption, and the clamping block and the pressing top block are retracted. The interior parts are then removed, and the positioning slider automatically resets under the action of the return spring.

[0013] In the step of determining the workpiece is in place, the sliding engagement between the guide pin and the guide groove ensures that the positioning slider does not deviate when sliding vertically. Only when the guide pin is fully inserted into the guide groove and the top surface of the positioning slider is flush with the isolation plate can the device start the subsequent clamping and adsorption operations.

[0014] Before performing four-way mechanical clamping, replace the flexible clamping claws that engage with the clamping seat according to the specifications and dimensions of the interior parts, so that the clamping direction of the pressing block is perpendicular to the extension and retraction direction of the clamping block, and the clamping end faces are at the same horizontal height.

[0015] Compared with the prior art, the present invention provides an injection molding and surface texturing device for automotive interior parts, which has the following advantages: the gravity-triggered workpiece positioning confirmation and anti-misstart structure composed of positioning slider, reset spring and guide pin improves processing efficiency and ensures processing quality; at the same time, the flexible clamping claw can be quickly replaced to adapt to different specifications of automotive interior parts, improving the versatility and processing efficiency of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure proposed in this invention; Figure 2 The cross-section proposed in this invention Figure 1 ; Figure 3 The cross-section proposed in this invention Figure 2 ; Figure 4 The cross-section proposed in this invention Figure 3 ; Figure 5 The cross-section proposed in this invention Figure 2 Part A; Figure 6 The cross-section proposed in this invention Figure 2 Part B; Figure 7 The cross-section proposed in this invention Figure 3 Part C.

[0017] In the diagram: 1. Machining base; 2. Vacuum box; 201. Vacuum chamber; 202. Clamping block; 203. Vacuum pump; 3. Card holder; 301. Card slot; 302. Flexible clamping claw; 303. Mounting slot; 304. Pressing top block; 4. Isolation plate; 401. Sliding mounting slot; 402. Guide slot; 403. Return spring; 404. Vent hole; 5. Positioning slider; 501. Guide pin. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example 1 Reference Figure 1-7 An injection molding and surface texturing device for automotive interior parts includes a processing base 1, a vacuum chamber 2 fixedly mounted on the processing base 1, and a vacuum pump 203 mounted below the vacuum chamber 2. A vacuum chamber 201 is formed inside the vacuum chamber 2, and the vacuum chamber 201 is connected to the suction end of the vacuum pump 203. An isolation plate 4 is fixedly connected inside the vacuum chamber 201, and multiple vent holes 404 are formed on the isolation plate 4, all of which are connected to the inner cavity of the vacuum chamber 201. Clamping blocks 202 are symmetrically arranged on the left and right inner walls of the vacuum chamber 201, and card seats 3 are symmetrically fixedly connected to the front and rear inner walls of the vacuum chamber 201. Card seats 3 have card slots 301, and flexible clamping claws 302 are detachably engaged within the card slots 301. An installation groove 303 is formed at the center of the flexible clamping claws 302, and a pressing top block 304 is fixedly installed within the installation groove 303.

[0020] Example 2 Reference Figure 1-7 An injection molding and surface texture treatment device for automotive interior parts is basically the same as that in Embodiment 1, but further: a sliding mounting groove 401 is provided at the center of the partition plate 4, a positioning slider 5 is slidably mounted in the sliding mounting groove 401, a return spring 403 is fixedly mounted at the bottom of the sliding mounting groove 401, and the other end of the return spring 403 is fixedly connected to the bottom surface of the positioning slider 5. The return spring 403 can drive the positioning slider 5 to slide back and forth in the vertical direction in the sliding mounting groove 401.

[0021] Example 3 Reference Figure 1-7 An injection molding and surface texturing device for automotive interior parts is basically the same as that in Embodiment 1, but with a further improvement: a guide pin 501 is fixedly connected to the bottom center of the positioning slider 5, and a guide groove 402 adapted to the size of the guide pin 501 is opened at the bottom of the sliding mounting groove 401. A reset spring 403 is sleeved on the outside of the guide pin 501. The guide pin 501 and the guide groove 402 are in a sliding fit with a gap. The guide pin 501 can extend into or out of the guide groove 402 synchronously with the sliding of the positioning slider 5, which not only ensures that the positioning slider 5 does not deviate or jam when sliding up and down, but also ensures the judgment of the workpiece's position.

[0022] Example 4 Reference Figure 1-7An injection molding and surface texturing device for automotive interior parts is basically the same as that in Embodiment 1, but further: the clamping end face of the clamping block 202 and the clamping end of the flexible clamping claw 302 are at the same horizontal height, and the pressing direction of the pressing top block 304 is perpendicular to the extension and retraction direction of the clamping block 202. It can simultaneously limit and fix the interior parts to be processed from the front, back, left and right directions to avoid the workpiece from shifting during the working process.

[0023] Example 5 Reference Figure 1-7 An injection molding and surface texturing device for automotive interior parts is basically the same as that in Embodiment 1, but with a further improvement: the vent holes 404 are evenly distributed in a rectangular array on the isolation plate 4 with the sliding mounting groove 401 as the center; the top surface of the positioning slider 5 is higher than the bearing surface of the isolation plate 4 in its natural state, and the lower end of the guide pin 501 is located above the groove opening of the guide groove 402. When the interior part to be processed is placed on the isolation plate 4, the gravity of the interior part presses the positioning slider 5 to compress the return spring 403 and slide downward. The guide pin 501 slides down synchronously with the positioning slider 5 and extends into the guide groove 402. Only when the positioning slider 5 slides down to the point where its top surface is flush with the bearing surface of the isolation plate 4 does it mean that the workpiece is completely placed in place, and at this time the device enters the preparation state for processing.

[0024] When the device is working, the injection-molded automotive interior parts are first placed into the vacuum chamber 201 of the vacuum box 2 and placed on the bearing surface of the isolation plate 4. The interior parts rely on their own gravity to press the positioning slider 5 to slide downwards, and the guide pin 501 slides into the guide groove 402 at the same time to ensure that the positioning slider 5 slides smoothly without jamming. Only when the positioning slider 5 is completely pressed to be flush with the isolation plate 4 does it mean that the workpiece is completely placed in place and the device triggers the processing preparation state. The clamping blocks 202 on the left and right sides, together with the pressing top blocks 304 on the flexible clamping claws 302 on the front and rear sides, simultaneously press and fix the interior parts from four directions. The vacuum pump 203 is started to evacuate the vacuum chamber 201, and the interior parts are firmly adsorbed onto the isolation plate 4 through the vent holes 404 on the isolation plate 4, completing the double fixation of the workpiece. Then the surface texture processing operation can be carried out.

[0025] The gravity-triggered workpiece positioning confirmation and anti-misstart structure, composed of positioning slider 5, reset spring 403 and guide pin 501, improves processing efficiency and ensures processing quality; at the same time, the flexible clamping claw 302 can be quickly replaced to adapt to different specifications of automotive interior parts, improving the versatility and processing efficiency of the device.

[0026] Example 6 Reference Figure 1-7 This embodiment provides a method for injection molding and surface texturing of automotive interior parts based on the above-mentioned device. The specific operation process is as follows: First, the operator places the injection-molded and cooled automotive interior part blank into the vacuum chamber (201) of the vacuum box (2), and places its bottom surface stably on the bearing surface of the partition plate (4). At this time, the weight of the interior part acts on the top surface of the positioning slider (5). After being pressed, the positioning slider (5) overcomes the elastic force of the return spring (403) and slides vertically downward along the sliding mounting groove (401). The guide pin (501) fixed at the bottom of the positioning slider (5) moves downward synchronously and gradually enters the guide groove (402). Since the guide pin (501) and the guide groove (402) are in clearance fit, it effectively ensures that the positioning slider (5) will not deviate or get stuck during the sliding process. When the operator observes or the sensor detects that the top surface of the positioning slider (5) is completely flush with the bearing surface of the partition plate (4), it indicates that the workpiece has been completely placed in place, and at this time the tip of the guide pin (501) is also completely submerged in the guide groove (402). This structural design ensures that the device can only start subsequent processing if the workpiece is placed correctly, effectively preventing processing quality problems caused by the workpiece not being placed in the correct position.

[0027] Secondly, after the workpiece is in place, the control system first drives the clamping blocks (202) on both sides of the vacuum chamber (201) to extend and clamp the interior trim from the left and right directions. At the same time, according to the specific outline dimensions of this batch of interior trim, the matching flexible clamping claws (302) have been installed in the slots (301) of the card holder (3) in advance. After the clamping blocks (202) clamp, the pressing top block (304) located in the center of the flexible clamping claws (302) presses the interior trim from the front and back directions. Since the clamping end face of the clamping block (202) and the clamping end of the flexible clamping claws (302) are at the same horizontal height, and the pressing direction of the pressing top block (304) is perpendicular to the extension and retraction direction of the clamping block (202), four-way limiting of the workpiece is achieved, effectively preventing horizontal displacement of the workpiece during subsequent processing.

[0028] Next, the vacuum pump (203) is started to continuously evacuate the vacuum chamber (201). Since the isolation plate (4) has multiple vent holes (404) arranged in an array with the sliding mounting groove (401) as the center, and all vent holes (404) are connected to the vacuum chamber (201), the air between the bottom surface of the workpiece and the isolation plate (4) is quickly drawn away, forming a negative pressure area. Under the action of atmospheric pressure, the workpiece is firmly adsorbed on the surface of the isolation plate (4). Through the dual fixing method of mechanical clamping and vacuum adsorption, even for interior parts with complex shapes or thin walls, it can be ensured that they do not warp, shift or vibrate during the texturing process, which significantly improves the processing accuracy.

[0029] Then, after the workpiece is stably fixed, the surface texturing equipment (such as a laser engraving head, chemical etching device, or mechanical grinding head, configured according to process requirements) is activated to perform high-precision texturing on the surface of the interior parts according to a preset program. Because the device of this invention provides extremely high positioning accuracy and fixing stability, the depth, clarity, and positional accuracy of the texture can be reliably guaranteed.

[0030] Finally, after the texture processing is completed, first turn off the vacuum pump (203), open the pressure relief valve of the vacuum chamber (201) (not shown in the figure, can be added as needed), so that the bottom surface of the workpiece returns to normal pressure and the vacuum adsorption is released. Then control the clamping block (202) and the pressing top block (304) to retract to the initial position. The operator removes the processed interior parts. At this time, the positioning slider (5) loses the workpiece pressure and automatically slides upward under the elastic force of the return spring (403), and its top surface is once again higher than the bearing surface of the isolation plate (4). At the same time, the guide pin (501) withdraws from the guide groove (402), and the entire device returns to the initial standby state, waiting for the next processing cycle.

[0031] By employing the above processing methods, combined with the device's gravity-triggered positioning confirmation structure, quickly replaceable flexible grippers, and vacuum adsorption system, the automation level, processing efficiency, processing quality, and equipment versatility of automotive interior parts texture processing are significantly improved.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An injection molding and surface texturing device for automotive interior parts, comprising a processing base (1), a vacuum chamber (2) fixedly mounted on the processing base (1), and a vacuum pump (203) mounted below the vacuum chamber (2), characterized in that, The vacuum chamber (2) has a vacuum cavity (201) connected to the vacuum pump (203). An isolation plate (4) is fixedly connected inside the vacuum cavity (201). The isolation plate (4) has multiple ventilation holes (404) connected to the vacuum cavity (201). Clamping blocks (202) are provided on the inner walls of the left and right sides of the vacuum cavity (201). Card seats (3) are fixedly connected to the inner walls of the front and rear sides of the vacuum cavity (201). Card slots (301) are provided on the card seats (3). Flexible clamping claws (302) are engaged in the card slots (301). An installation groove (303) is provided in the center of the flexible clamping claws (302). A pressing top block (304) is fixedly installed in the installation groove (303).

2. The injection molding and surface texturing device for automotive interior parts according to claim 1, characterized in that, The center of the isolation plate (4) is provided with a sliding mounting groove (401), and a positioning slider (5) is slidably installed in the sliding mounting groove (401). A return spring (403) is fixedly installed at the bottom of the sliding mounting groove (401), and the other end of the return spring (403) is fixedly connected to the bottom surface of the positioning slider (5).

3. The injection molding and surface texturing device for automotive interior parts according to claim 2, characterized in that, The bottom of the positioning slider (5) is fixedly connected to a guide pin (501), and the bottom of the sliding mounting groove (401) is provided with a guide groove (402) that is adapted to the guide pin (501). The reset spring (403) is sleeved on the outside of the guide pin (501), and the guide pin (501) and the guide groove (402) slide together.

4. The injection molding and surface texturing device for automotive interior parts according to claim 2, characterized in that, The clamping end face of the clamping block (202) is at the same horizontal height as the clamping end of the flexible clamping claw (302), and the pressing direction of the pressing top block (304) is perpendicular to the extension direction of the lateral telescopic clamping block (202).

5. The injection molding and surface texturing device for automotive interior parts according to claim 1, characterized in that, The ventilation holes (404) are evenly distributed in an array on the isolation plate (4) with the sliding mounting groove (401) as the center, and the ventilation holes (404) are connected to the inner cavity of the vacuum chamber (201).

6. The injection molding and surface texturing device for automotive interior parts according to claim 3, characterized in that, The top surface of the positioning slider (5) is normally higher than the bearing surface of the isolation plate (4). The lower end of the guide pin (501) is located above the groove of the guide groove (402). When the interior trim to be processed is placed on the isolation plate (4), the gravity of the interior trim presses the positioning slider (5) to compress the reset spring (403) and slides downward. The guide pin (501) slides down synchronously with the positioning slider (5) and extends into the guide groove (402). When the positioning slider (5) slides down to the point where its top surface is flush with the bearing surface of the isolation plate (4), the guide pin (501) is fully extended into the guide groove (402), and the device enters the processing preparation state.

7. A method for injection molding and surface texturing of automotive interior parts, applied to the injection molding and surface texturing apparatus for automotive interior parts as described in any one of claims 1-6, characterized in that, Includes the following steps: Place the interior trim to be processed on the bearing surface of the partition plate (4), use the gravity of the interior trim to press the positioning slider (5) to slide down and compress the return spring (403) until the top surface of the positioning slider (5) is flush with the bearing surface of the partition plate (4), and determine that the workpiece is in place and enters the processing state; The interior trim is mechanically clamped in four directions by the clamping blocks (202) on the left and right sides and the pressing top blocks (304) on the front and rear sides. At the same time, the vacuum pump (203) is started to evacuate the vacuum chamber (201), and the interior trim is adsorbed and fixed through the vent holes (404) on the isolation plate (4). After the surface texture treatment is completed, the vacuum pump (203) is turned off, the adsorption is released, and the clamping block (202) and the pressing top block (304) are retracted. The interior parts are taken out, and the positioning slider (5) is automatically reset under the action of the reset spring (403).

8. The method for injection molding and surface texturing of automotive interior parts according to claim 7, characterized in that, In the step of determining the workpiece is in place, the sliding cooperation between the guide pin (501) and the guide groove (402) ensures that the positioning slider (5) does not deviate when sliding vertically; only when the guide pin (501) is fully inserted into the guide groove (402) and the top surface of the positioning slider (5) is flush with the isolation plate (4) can the device start the subsequent clamping and adsorption operation.

9. The method for injection molding and surface texturing of automotive interior parts according to claim 7, characterized in that, Before performing four-way mechanical clamping, replace the flexible clamping claw (302) that is engaged on the card holder (3) according to the specifications and dimensions of the interior parts, so that the pressing direction of the pressing block (304) is perpendicular to the extension and retraction direction of the clamping block (202), and the clamping end face is at the same horizontal height.

Images