Structure of low-pressure injection anti-wrinkle cloth

Abstract

The utility model belongs to the field of automobile injection mold, concretely relates to a low pressure injection anti -wrinkle cloth's structure, including cavity and core, the cavity lower surface is placed with the fabric, the fabric lower surface is injection molded with injection molded part, the injection molded part lower surface is set to the core, the fabric extends to the outside of injection molded part, the core on the outside of injection molded part side corner place is provided with the cutting mouth, the cutting mouth top is the fabric, the cutting mouth includes arc cutting mouth and a plurality of vertical strip cutting mouths, arc cutting mouth and injection molded part corner one side shape is compatible and sets up on the one side of core arc, a plurality of vertical strip cutting mouths evenly scattered set in the edge of core arc, vertical strip cutting mouth extends from arc cutting mouth to the edge of core. The utility model structure is simple and reliable, sets up the cutting mouth at the outside of injection molded part corner, directly cuts off the fabric accumulated outside injection molded part, avoids the transmission of the wrinkled fabric to the product.

Description

Technical Field

[0001] This utility model belongs to the field of automotive injection molds, and specifically relates to the structure of a low-pressure injection molding anti-wrinkle cloth. Background Technology

[0002] To prevent fabric wrinkles during low-pressure injection molding and subsequent appearance defects, pressure needles or blocks are typically used to hold the fabric in place. However, fabric accumulation and wrinkles can occur at the corners of the molded part, and these pressure needles or blocks are unlikely to completely solve the problem. Figure 2 As shown, the conventional pressure pin structure uses a spring to automatically adjust the pressure on the fabric. It is simple in structure and has a long service life. However, pressure pin structures are mainly used in areas where the mold parting surface is relatively flat, and they are numerous, resulting in high mold processing costs. Spring failure can also affect the product's appearance quality. For example... Figure 3 As shown, conventional pressure blocks use springs to automatically adjust the pressure on the fabric. They have a simple structure and a long service life. However, the pressure block structure is mainly used in areas where the mold parting surface is relatively flat. This results in high mold processing costs, and spring failure can affect the product's appearance quality. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, this utility model provides a structure for a low-pressure injection molding anti-wrinkle fabric. A cutting edge is provided on the outer side of the corner of the injection molded part to directly cut off the fabric accumulated on the outer side of the injection molded part, thus preventing the wrinkled fabric from being transferred to the product.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a structure for a low-pressure injection-molded anti-wrinkle fabric, comprising a cavity and a core, with a fabric placed below the cavity, an injection-molded part below the fabric, and a core positioned below the injection-molded part. The fabric extends to the outside of the injection-molded part, and a cutting edge is provided on the core on the outside of the corner of the injection-molded part. The fabric is above the cutting edge, and the cutting edge includes an arc-shaped cutting edge and several vertical cutting edges. The arc-shaped cutting edge is adapted to the shape of one side of the corner of the injection-molded part and is positioned on one side of the arc of the core. Several vertical cutting edges are evenly distributed along the edge of the arc of the core, extending from the arc-shaped cutting edge to the edge of the core.

[0005] Furthermore, the distance between the arc-shaped cutting edge and the corner of the injection molded part is d, where d is 15mm, and the length of the vertical cutting edge is less than 5mm.

[0006] Compared with the prior art, the beneficial effects of this utility model are: the utility model has a simple and reliable structure and low manufacturing cost. A cutting edge is set on the outside of the corner of the injection molded part to directly cut off the fabric accumulated on the outside of the injection molded part, release the wrinkle space, avoid the wrinkled fabric from being transferred to the product, and solve the problem of appearance wrinkles. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the product structure of this utility model;

[0008] Figure 2 This is a schematic diagram of a conventional pressure needle structure;

[0009] Figure 3 This is a schematic diagram of a conventional pressing block structure;

[0010] Figure 4 This is a schematic diagram of the core structure of this utility model;

[0011] Figure 5 for Figure 4 Sectional view at point AA;

[0012] Figure 6 This is a cross-sectional view of the convex and concave molds of this utility model when they are closed. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1 As shown, one side of this product is an arc-shaped corner. At the corner of the injection molded part, there will be a problem of fabric 2 accumulating and wrinkling. Usually, pressure needles or pressure blocks are used to press down the fabric 2 at the corner.

[0015] like Figure 2 As shown, a conventional pressure pin structure requires a spring pin 6, a spring 7, and a fixing block 8. The spring pin 6 is pushed up by the spring 7. Before the cavity 3 and the core 4 come into contact, the spring pin 6 contacts the cavity 3 first, so that the fabric 2 on the cavity 3 is evenly flattened before the cavity 3 and core 4 close the mold, and then injection molding is performed. Pressure pin structures are mainly used in areas where the mold parting surface is relatively flat. They are numerous, resulting in high mold processing costs. Failure of the spring 7 will affect the appearance quality of the product.

[0016] like Figure 3 As shown, a conventional pressure block structure requires a spring fixing block 10, a spring 7, a guide rod 11, and a pressure block 9. The spring 7 pushes the pressure block 9 upwards. Before the cavity 3 and core 4 contact, the pressure block 9 contacts the cavity 3 first, evenly flattening the fabric 2 on the cavity 3 before the cavity 3 and core 4 close, followed by injection molding. The pressure block structure is mainly used in areas where the mold parting surface is relatively flat. However, this results in high mold processing costs, and failure of the spring 7 can affect the product's appearance quality.

[0017] Please see Figure 4-6Based on the above problems, this utility model provides the following technical solution: a structure for a low-pressure injection molded anti-wrinkle fabric, including a cavity 3 and a core 4. A fabric 2 is placed below the cavity 3, and an injection molded part 1 is injected below the fabric 2. The core 4 is positioned below the injection molded part 1, and the fabric 2 extends to the outside of the injection molded part 1. Therefore, from top to bottom, the outside of the injection molded part 1 consists of the cavity 3, the fabric 2, and the core 4. A cutting edge 5 is provided on the core 4 at the outer corner of the side of the injection molded part 1, with the fabric 2 on top of the cutting edge 5. After mold closing, the cutting edge 5 will... 1. The outer side of the fabric 2 at the side corner is cut. The cutting edge 5 includes an arc-shaped cutting edge 51 and several vertical cutting edges 52. The arc-shaped cutting edge 51 is adapted to the shape of one side of the corner of the injection molded part 1 and is set on one side of the arc of the core 4. Several vertical cutting edges 52 are evenly distributed on the edge of the arc of the core 4. The vertical cutting edges 52 extend from the arc-shaped cutting edge 51 to the edge of the core 4. The setting of the arc-shaped cutting edge 51 and several vertical cutting edges 52 makes the fabric 2 completely stretched and flattened, and also facilitates the cutting of the fabric 2.

[0018] Specifically, the distance between the arc-shaped cutting edge 51 and the corner of the side of the injection molded part 1 is d, where d is 15mm, and the length of the vertical cutting edge 52 is less than 5mm.

[0019] The working principle of this utility model is as follows: After the fabric 2 is placed in the mold, the cavity 3 and the core 4 are closed for injection molding. After the cavity 3 and the core 4 are closed and pressed together, the fabric 2 is pressed against the surface of the cavity 3 by the impact of the injection plastic flow. The cutting edge 5 cuts the fabric 2, and the continuous clamping force cuts the fabric, releasing the wrinkle space and preventing the wrinkles at the corners from being transferred to the product, thus solving the problem of appearance wrinkles.

[0020] This invention can solve the problem of fabric wrinkles when local fabric accumulation cannot be completely resolved by pressing needles or pressing strips alone. The mold structure is simple, the manufacturing cost is low, the product appearance quality is good, and the mass production stability is high.

[0021] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. The structure of a low-pressure injection-molded wrinkle-resistant fabric, characterized in that, The mold includes a cavity (3) and a core (4). A fabric (2) is placed under the cavity (3). An injection molded part (1) is injected under the fabric (2). The core (4) is set under the injection molded part (1). The fabric (2) extends to the outside of the injection molded part (1). A cutting edge (5) is provided on the core (4) on the outside of the corner of the side of the injection molded part (1). The fabric (2) is on the cutting edge (5). The cutting edge (5) includes an arc-shaped cutting edge (51) and several vertical cutting edges (52). The arc-shaped cutting edge (51) is adapted to the shape of one side of the corner of the injection molded part (1) and is set on one side of the arc of the core (4). Several vertical cutting edges (52) are evenly distributed at the edge of the arc of the core (4). The vertical cutting edges (52) extend from the arc-shaped cutting edge (51) to the edge of the core (4).

2. The structure of a low-pressure injection-molded wrinkle-resistant fabric according to claim 1, characterized in that, The distance between the arc-shaped cutting edge (51) and the side corner of the injection molded part (1) is d, where d is 15mm, and the length of the vertical cutting edge (52) is less than 5mm.

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