A process for edge sealing a composite part

Abstract

The application provides a composite edge sealing self-detaching process, and belongs to the technical field of automobile part manufacturing, and comprises the following steps: S1, a first male die of a mold body is opened from a mold closing position to a plastic pressing position; S2, the first male die is used for injection molding a first material part; S3, the first male die is kept in the plastic pressing position; S4, the first male die is used for injection molding an edge sealing material part to the first material part; S5, the first male die is opened from the plastic pressing position to an opening position; S6, a second male die is used for injection molding a second material part to the first material part and the edge sealing material part; S7, the second male die is opened from the plastic pressing position to the opening position, a composite part formed by the first material part and the second material part is taken out, and the edge sealing material part is detached from the composite part. The application has the beneficial effect that the edge sealing material part is additionally injection molded to replace the edge sealing part formed in the first material part forming process, and finally the edge sealing material part can be automatically detached from the composite part formed by the first material part and the second material part.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts manufacturing technology and relates to a self-detachment process for edge sealing of composite parts. Background Technology

[0002] Some automotive parts, such as grilles and windows, require PC (polycarbonate) and PUR (polyurethane) composites. During the manufacturing process, the PUR needs to be edge-sealed.

[0003] In existing technologies, the edge sealing part is often directly formed using the PC molding process, and then PUR is injected. In subsequent processing, the edge sealing part of the PC needs to be removed by milling to obtain the finished product, which increases the time and the cost of post-processing, and there is considerable room for improvement. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a self-detaching process for edge sealing of composite parts.

[0005] The objective of this invention can be achieved through the following technical solution: a self-detaching process for edge sealing of composite parts, comprising the following steps:

[0006] S1: The first punch of the mold body opens from the mold closing position to the compression position, the first mold cavity opens, and the sealing cavity closes;

[0007] S2: First punch injection molding of the first material part;

[0008] S3: The first punch remains in the compression position, the first mold cavity opens, and the sealing cavity opens;

[0009] S4: The first punch injects material into the first material part to form a sealing material part;

[0010] S5: The first punch opens from the compression position to the mold opening position, the mold body transfers the first material part and the edge sealing material part together to the second mold cavity, and the second punch of the mold body closes from the mold opening position to the compression position;

[0011] S6: The second punch injects the first material part and the edge sealing material part together to form the second material part;

[0012] S7: The second punch opens from the compression position to the mold opening position, removes the composite part formed by the first material part and the second material part, and the edge sealing material part is separated from the composite part.

[0013] In the above-mentioned composite edge sealing self-detachment process, the movable block of the first die can approach or move away from the first die. In step S1, the movable block approaches the first punch and contacts the first punch to seal the edge sealing cavity. In step S3, the movable block moves away from the first punch and separates from the first punch to open the edge sealing cavity.

[0014] In the above-mentioned composite part edge sealing self-detachment process, in step S2, after the first punch injection molds the first material part, the first punch approaches the first die to compress the first material part.

[0015] In the above-mentioned self-detachment process for edge sealing of composite parts, the elastic block of the first punch can be close to or away from the movable block. In step S2, when the first punch approaches the first die to compress the first material part, the elastic block is always in contact with the movable block.

[0016] In the above-mentioned composite edge sealing self-detachment process, in step S6, after the second punch injection molds the first material part and the edge sealing material part to form the second material part, the second punch approaches the second die to compress the second material part.

[0017] In the above-mentioned composite edge sealing self-detachment process, in step S6, when the second punch approaches the second die to compress the second material part, the closing block of the second punch is always in contact with the edge sealing material part and is embedded in the edge sealing material part during the compression process.

[0018] In the above-mentioned composite edge sealing self-detachment process, in step S5, the mold body transfers the first material part and the edge sealing material part together to the second mold cavity; in step S6, steps S2-S4 can be performed on another first material part at the same time; in step S7, the composite part formed by the first material part and the second material part is taken out, and after the edge sealing material part is detached from the composite part, step S5 can be performed on another first material part and the edge sealing material part.

[0019] In the above-mentioned composite edge sealing self-detachment process, the rotating seat of the mold body can drive the first cavity mold and the second cavity mold to exchange positions. The second cavity mold is provided with the same movable block as the first cavity mold. In step S5, the rotating seat transfers the first material part and the edge sealing material part together to the second mold cavity.

[0020] In the aforementioned composite edge-sealing self-detachment process, the first material is a PC part, the second material is a PUR part, and the edge-sealing material is not adhered to the first material and the second material.

[0021] In the aforementioned composite edge-sealing self-detachment process, the edge-sealing material is PP.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. By replacing the edge sealing part formed during the molding process of the first material part with an additional injection-molded edge sealing material part, the edge sealing material part can be automatically detached from the composite part formed by the first material part and the second material part. There is no need for subsequent removal of the edge sealing part such as milling, which reduces labor time and post-processing costs.

[0024] 2. The sealing cavity is flexibly closed and opened by moving the movable block closer to or further away from the first cavity. When the first punch moves closer to the first cavity to compress the first material part, the elastic block is always in contact with the movable block, creating a sealed compression molding environment, which can achieve compression molding without damaging the product.

[0025] 3. The mold body has reserved compression molding space on the basis of injection molding. After the second punch injection molds the first material part and the edge sealing material part to form the second material part, the second punch approaches the second die to compress the second material part. After compression molding, the thickness of the second material part can be made thinner, reducing the overall product cost.

[0026] 4. By keeping the sealing block in constant contact with the edge sealing material, a sealed compression molding environment is created. The sealing block is embedded into the edge sealing material during the compression molding process, which can achieve compression molding without damaging the product.

[0027] 5. Two different production steps can be carried out simultaneously within the mold body, and the production processes of the two products do not interfere with each other, which improves the production cycle and reduces labor time and production costs; the position of the first die and the second die can be changed by rotating the mold body. Attached Figure Description

[0028] Figure 1 This is a process flow diagram of the self-detachment process for edge sealing of composite parts according to the present invention.

[0029] Figure 2 This is a schematic diagram of the edge-sealing material component of the present invention before it is detached from the composite component.

[0030] Figure 3 This is a schematic diagram of the structure of the composite component of the present invention.

[0031] Figure 4 This is a schematic diagram of the state of step S1 of the present invention.

[0032] Figure 5 This is a schematic diagram of the state of step S2 of the present invention.

[0033] Figure 6 This is a schematic diagram of the states of steps S3 and S4 of the present invention.

[0034] Figure 7 This is a schematic diagram of the state of step S5 of the present invention.

[0035] Figure 8 This is a schematic diagram of the state of step S6 of the present invention.

[0036] Figure 9 This is a schematic diagram showing the simultaneous execution of steps S6 and S2 according to the present invention.

[0037] Figure 10 This is a partially enlarged view of steps S1 and S2 of the present invention.

[0038] Figure 11 This is a partially enlarged view of steps S3 and S4 of the present invention.

[0039] Figure 12 This is a partially enlarged view of the injection molding of PUR in step S6 of the present invention.

[0040] Figure 13 This is a partially enlarged view of the compression-molded PUR in step S6 of the present invention.

[0041] In the figure, 100 is the first punch; 110 is the elastic block; 200 is the first die; 210 is the movable block; 300 is the second punch; 310 is the closing block; 400 is the second die; 500 is the rotating seat; 600 is the first material part; 700 is the second material part; and 800 is the edge sealing material part. Detailed Implementation

[0042] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0044] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0048] like Figures 1-13 As shown, a self-detaching edge banding process for composite parts includes the following steps:

[0049] S1: The first punch 100 of the mold body opens from the mold closing position to the compression position, the first mold cavity opens, and the sealing cavity closes;

[0050] S2: First punch 100 injection molding first material part 600;

[0051] S3: The first punch 100 remains in the compression position, the first mold cavity opens, and the sealing cavity opens;

[0052] S4: The first punch 100 injects mold towards the first material part 600 to form the edge sealing material part 800;

[0053] S5: The first punch 100 opens from the compression position to the opening position, the mold body transfers the first material part 600 and the edge sealing material part 800 together to the second mold cavity, and the second punch 300 of the mold body closes from the opening position to the compression position;

[0054] S6: The second punch 300 is injection molded towards the first material part 600 and the edge sealing material part 800 to form the second material part 700;

[0055] S7: The second punch 300 opens from the compression position to the mold opening position, removes the composite part formed by the first material part 600 and the second material part 700, and the edge sealing material part 800 detaches from the composite part.

[0056] Specifically, the first material part 600 is a PC part, the second material part 700 is a PUR part, and the edge sealing material part 800 is not bonded to the first material part 600 and the edge sealing material part 800 is not bonded to the second material part 700.

[0057] Specifically, the edge banding material 800 can be a PP (polypropylene) part.

[0058] In this embodiment, by replacing the edge sealing portion formed during the molding process of the first material part 600 with an additional injection-molded edge sealing material part 800, the edge sealing material part 800 can automatically detach from the composite part formed by the first material part 600 and the second material part 700, without the need for subsequent removal of the edge sealing portion such as milling, thus reducing labor time and post-processing costs.

[0059] like Figures 1-13 As shown, based on the above embodiment, the movable block 210 of the first die 200 can approach or move away from the first die 200. In step S1, the movable block 210 approaches the first punch 100 and contacts the first punch 100 to seal the sealing cavity. In step S3, the movable block 210 moves away from the first punch 100 and separates from the first punch 100 to open the sealing cavity.

[0060] In this embodiment, the sealing cavity is flexibly closed and opened by moving the movable block 210 closer to or further away from the first die 200.

[0061] like Figures 1-13 As shown, based on the above embodiment, in step S2, after the first punch 100 injection molds the first material part 600, the first punch 100 approaches the first die 200 to compress the first material part 600.

[0062] In this embodiment, after the first punch 100 injection molds the first material part 600, the first punch 100 approaches the first die 200 to compress the first material part 600, thereby realizing the compression molding of the first material part 600 after injection molding.

[0063] like Figures 1-13 As shown, based on the above embodiments, in the above-mentioned composite part sealing self-detachment process, the elastic block 110 of the first punch 100 can be close to or away from the movable block 210. In step S2, when the first punch 100 is close to the first die 200 to compress the first material part 600, the elastic block 110 is always in contact with the movable block 210.

[0064] In this embodiment, when the first punch 100 is close to the first die 200 to compress the first material part 600, the elastic block 110 is always in contact with the movable block 210, creating a sealed compression molding environment, which can achieve compression molding without damaging the product.

[0065] like Figures 1-13 As shown, based on the above embodiment, in step S6, after the second punch 300 injection molds the first material part 600 and the edge sealing material part 800 to form the second material part 700, the second punch 300 approaches the second die 400 to compress the second material part 700.

[0066] It is worth noting that in the existing technology, the mold has no compression space, and therefore lacks a compression molding process for the second material part 700.

[0067] In this embodiment, the mold body has a compression molding space reserved on the basis of injection molding. After the second punch 300 injection molds the first material part 600 and the edge sealing material part 800 to form the second material part 700, the second punch 300 approaches the second die 400 to compress the second material part 700. After compression molding, the thickness of the second material part 700 can be made thinner, reducing the overall product cost.

[0068] like Figures 1-13 As shown, based on the above embodiment, in step S6, when the second punch 300 approaches the second die 400 to compress the second material part 700, the closing block 310 of the second punch 300 is always in contact with the edge sealing material part 800 and is embedded in the edge sealing material part 800 during the compression process.

[0069] In this embodiment, a sealed compression molding environment is created by keeping the sealing block 310 in constant contact with the edge sealing material 800, and the sealing block 310 is embedded into the edge sealing material 800 during the compression molding process, so that compression molding can be achieved without damaging the product.

[0070] like Figures 1-13 As shown, based on the above embodiment, in step S5, the mold body transfers the first material part 600 and the edge sealing material part 800 together to the second mold cavity; in step S6, steps S2-S4 can be performed on another first material part 600 at the same time; in step S7, the composite part formed by the first material part 600 and the second material part 700 is taken out, and after the edge sealing material part 800 is detached from the composite part, step S5 can be performed on another first material part 600 and the edge sealing material part 800.

[0071] In this embodiment, two different product production steps can be carried out simultaneously within the mold body, and the production processes of the two products do not interfere with each other, thereby improving the production cycle and reducing labor time and production costs.

[0072] like Figures 1-13 As shown, based on the above embodiment, the rotating seat 500 of the mold body can drive the first cavity 200 and the second cavity 400 to change positions. The second cavity 400 is provided with the same movable block 210 as the first cavity 200. In step S5, the rotating seat 500 transfers the first material part 600 and the edge sealing material part 800 together to the second mold cavity.

[0073] In this embodiment, the position of the first die 200 and the second die 400 is switched by the rotating seat 500 of the mold body.

Claims

1. A self-detaching process for edge sealing of composite components, characterized in that, include: The edge banding material is not adhered to the first material and the edge banding material is not adhered to the second material; Also includes step: S1: The first punch of the mold body opens from the mold closing position to the compression position, the first mold cavity opens, and the sealing cavity closes; S2: First punch injection molding of the first material part; S3: The first punch remains in the compression position, the first mold cavity opens, and the sealing cavity opens; S4: The first punch injects material into the first material part to form a sealing material part; S5: The first punch opens from the compression position to the mold opening position, the mold body transfers the first material part and the edge sealing material part together to the second mold cavity, and the second punch of the mold body closes from the mold opening position to the compression position; S6: The second punch injects the first material part and the edge sealing material part together to form the second material part; S7: The second punch opens from the compression position to the mold opening position, removes the composite part formed by the first material part and the second material part, and the edge sealing material part is separated from the composite part.

2. The self-detaching process for edge sealing of composite parts as described in claim 1, characterized in that: The movable block of the first die can move closer to or further away from the first die. In step S1, the movable block moves closer to the first punch and contacts the first punch to seal the sealing cavity. In step S3, the movable block moves away from the first punch and separates from the first punch to open the sealing cavity.

3. The self-detaching process for edge sealing of composite parts as described in claim 2, characterized in that: In step S2, after the first punch injection molds the first material part, the first punch approaches the first die to compress the first material part.

4. The self-detaching process for edge sealing of composite parts as described in claim 3, characterized in that: The elastic block of the first punch can be close to or away from the movable block. In step S2, when the first punch is close to the first die to compress the first material part, the elastic block is always in contact with the movable block.

5. The self-detaching process for edge sealing of composite parts as described in claim 1, characterized in that: In step S6, after the second punch injection molds the first material part and the edge sealing material part to form the second material part, the second punch approaches the second die to compress the second material part.

6. The self-detaching process for edge sealing of composite parts as described in claim 5, characterized in that: In step S6, when the second punch approaches the second die to compress the second material part, the closing block of the second punch is always in contact with the edge sealing material part and is embedded in the edge sealing material part during the compression process.

7. The self-detaching process for edge sealing of composite parts as described in claim 1, characterized in that: In step S5, the mold body transfers the first material part and the edge sealing material part together to the second mold cavity; in step S6, steps S2-S4 are performed on another first material part at the same time; in step S7, the composite part formed by the first material part and the second material part is taken out, and after the edge sealing material part is detached from the composite part, step S5 is performed on the other first material part and the edge sealing material part.

8. The self-detaching process for edge sealing of composite parts as described in claim 7, characterized in that: The rotating seat of the mold body drives the first cavity mold and the second cavity mold to switch positions. The second cavity mold is provided with the same movable block as the first cavity mold. In step S5, the rotating seat transfers the first material part and the edge sealing material part together to the second mold cavity.

9. The self-detaching process for edge sealing of composite parts as described in claim 1, characterized in that: The first material component is a PC component, and the second material component is a PUR component.

10. The self-detaching process for edge sealing of composite parts as described in claim 9, characterized in that: The edge banding material is made of PP.

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