Elastic demolding reset structure of TPE automobile trunk pad injection molding mold

Abstract

The utility model provides an elastic demolding reset structure of a TPE automobile trunk pad injection molding mold, and belongs to the technical field of molds. The automobile trunk pad forming mold comprises a lower mold plate, the upper surface of the lower mold plate is provided with a lower forming face forming an automobile trunk pad forming cavity, and the lower mold plate is further provided with a straight ejection assembly which is connected with a top plate arranged on the lower side of the lower mold plate. After a product is subjected to injection molding, the top plate moves upwards and can eject out the product on the lower mold plate through the straight ejection assembly, the elastic demolding reset assembly can drive the top plate to move downwards and reset through elastic force, and therefore the lifting mechanism for driving the top plate does not need to be fixedly connected with the top plate and only needs to be arranged below the top plate; the lifting mechanism applies thrust to the top plate from the bottom of the top plate to drive the top plate to ascend, after the product is ejected out, the lifting mechanism resets, and the top plate resets in the elastic demolding reset assembly.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an elastic demolding and reset structure for a TPE automotive trunk mat injection molding mold. Background Technology

[0002] TPE car trunk mats are generally injection molded. After injection molding, the mats need to be ejected by an ejection mechanism. In the existing technology, the top plate inside the ejection mechanism needs to be driven by a lifting mechanism. When the lifting mechanism drives the top plate to rise, it ejects the product. After the product is demolded, the lifting mechanism drives the top plate to fall and reset. This requires the power output end of the lifting mechanism to be fixedly connected to the top plate, which makes disassembly quite troublesome.

[0003] For example, a Chinese patent discloses an injection mold for a large, environmentally friendly, anti-slip, all-TPE car trunk mat [application number: 202221509131.9], including an upper mold and a lower mold. A molding cavity for injection molding a large-area trunk mat is provided between the upper and lower molds. Several rib-forming structures can form numerous ribs on the surface of the trunk mat to improve its anti-slip performance. Several positioning groove-forming structures can also form positioning grooves on the trunk mat that match the protrusions inside the trunk, facilitating precise installation of the mat. Several screw hole-forming structures can form screw holes on the mat. These screw holes, in conjunction with screws and pre-drilled screw holes inside the trunk, can fix the mat and prevent it from moving. A full-coverage injection structure can simultaneously inject glue from multiple positions within the molding cavity, preventing insufficient flow of the injection liquid due to the large area of ​​the trunk mat. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing an elastic demolding and reset structure for a TPE automotive trunk mat injection molding die.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An elastic demolding and reset structure for a TPE car trunk mat injection molding mold includes a lower template. The upper surface of the lower template has a lower molding surface that forms the molding cavity of the car trunk mat. The lower template is also provided with a straight ejector assembly, which is connected to a top plate located on the lower side of the lower template. An elastic demolding and reset assembly is also provided between the top plate and the lower template. The lower template is also provided with a bottom glue inlet mechanism.

[0007] In the above-mentioned elastic demolding and reset structure of the TPE car trunk mat injection molding mold, the elastic demolding and reset component includes four guide pillars fixed to the bottom of the lower mold plate. The bottom of the guide pillars is fixed to the bottom plate set on the lower side of the lower mold plate. An elastic element is sleeved on the guide pillars, and the upper and lower ends of the elastic element abut against the lower mold plate and the top plate, respectively.

[0008] In the above-mentioned elastic demolding and reset structure of the TPE car trunk mat injection molding mold, the elastic element is a spring.

[0009] In the above-mentioned elastic demolding and reset structure of the TPE car trunk mat injection molding mold, a sliding sleeve is fixedly connected to the top plate, and the guide post passes through the sliding sleeve.

[0010] In the above-mentioned TPE car trunk mat injection molding mold elastic demolding and reset structure, a circular end plate is fixedly connected to the outer side of the top of the sliding sleeve, the bottom of the circular end plate abuts against the bottom of the limiting groove set on the top plate, and a positioning plate fixedly connected to the top plate by bolts, the bottom of the positioning plate abuts against the top of the circular end plate.

[0011] In the above-mentioned TPE automotive trunk mat injection molding mold elastic demolding and reset structure, the straight ejector assembly includes several straight ejector blocks embedded in the top of the lower template, and the bottom of the straight ejector blocks is fixedly connected to the top plate through straight ejector rods.

[0012] In the above-mentioned elastic demolding and reset structure of the TPE car trunk mat injection molding mold, the bottom injection mechanism includes an injection plate disposed between the bottom plate and the top plate. An injection tube is fixedly connected to the top of the injection plate. The injection tube vertically penetrates the top plate and the lower template and its top end is connected to the car trunk mat molding cavity.

[0013] In the above-mentioned TPE automotive trunk mat injection molding mold elastic demolding and reset structure, the injection plate has an I-shaped cross section and is composed of two parallel manifolds and a connecting plate connecting the two manifolds. The connecting plate and the manifolds are arranged perpendicularly.

[0014] In the above-mentioned TPE car trunk mat injection molding mold elastic demolding and reset structure, five injection tubes are provided, of which four injection tubes are respectively set at both ends of the two diversion plates, and one injection tube is set in the middle of the connecting plate.

[0015] In the above-mentioned elastic demolding and reset structure of the TPE car trunk mat injection molding mold, the top of the top plate is also fixedly connected with four limiting posts, the top of the limiting posts vertically penetrating the lower template and slidingly connected to the lower template.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. After the product is injection molded, the top plate moves upward and ejects the product from the lower mold plate through the straight ejection component. The elastic demolding reset component can use elastic force to drive the top plate to move downward and reset. Therefore, the lifting mechanism that drives the top plate does not need to be fixed to the top plate. The lifting mechanism only needs to be set below the top plate. When ejecting the product, the lifting mechanism applies a pushing force from the bottom of the top plate to drive the top plate to rise. After the product is ejected, the lifting mechanism resets, and the top plate is reset by the elastic demolding reset component. The bottom glue injection mechanism can inject glue from below the molding cavity of the car trunk mat, so that the glue gate is formed on the back of the car trunk mat to prevent the glue gate from affecting the outer surface quality of the trunk mat.

[0018] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the lower template;

[0020] Figure 2 This is a sectional view of the lower template;

[0021] Figure 3 This is a partial structural schematic diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the bottom glue infeed mechanism.

[0023] In the diagram, the components are: 1. Lower mold plate; 2. Lower forming surface; 3. Top plate; 4. Elastic demolding and reset assembly; 5. Bottom injection mechanism; 6. Guide post; 7. Base plate; 8. Elastic component; 9. Sliding sleeve; 10. Circular end plate; 11. Positioning plate; 12. Straight ejector block; 13. Straight ejector rod; 14. Injection plate; 15. Injection tube; 16. Diverter plate; 17. Connecting plate; 18. Limiting post. Detailed Implementation

[0024] like Figures 1-4 As shown, a TPE car trunk mat injection molding mold elastic demolding and reset structure includes a lower template 1. The upper surface of the lower template 1 has a lower molding surface 2 that forms the molding cavity of the car trunk mat. The lower template 1 is also provided with a straight ejector assembly, which is connected to a top plate 3 located on the lower side of the lower template 1. An elastic demolding and reset assembly 4 is also provided between the top plate 3 and the lower template 1. The lower template 1 is also provided with a bottom glue inlet mechanism 5.

[0025] In this invention, after the product is injection molded, the top plate moves upward and can eject the product from the lower mold plate through the straight ejection component. The elastic demolding reset component can use elastic force to drive the top plate to move downward and reset. Therefore, the lifting mechanism (not shown in the figure) that drives the top plate does not need to be fixed to the top plate. The lifting mechanism only needs to be set below the top plate. When ejecting the product, the lifting mechanism applies a pushing force to the top plate from the bottom to drive the top plate to rise. After the product is ejected, the lifting mechanism resets, and the top plate is reset by the elastic demolding reset component 4. The bottom glue injection mechanism can inject glue from below the molding cavity of the car trunk mat, so that the glue opening is formed on the back of the car trunk mat to prevent the glue opening from affecting the outer surface quality of the trunk mat.

[0026] Those skilled in the art should understand that the lifting mechanism can be a lifting cylinder.

[0027] Specifically, the elastic demolding and resetting assembly 4 includes four guide pillars 6 fixed to the bottom of the lower mold plate 1. The bottom of each guide pillar 6 is fixed to a base plate 7 located on the lower side of the lower mold plate 1. An elastic element 8 is fitted onto each guide pillar 6, with its upper and lower ends abutting against the lower mold plate 1 and the top plate 3, respectively. The elastic element 8 is a spring. When the top plate moves upward, the springs fitted onto the guide pillars are compressed. When the lifting mechanism resets, the compressed springs drive the top plate to move downward and reset.

[0028] Specifically, a sliding sleeve 9 is fixedly connected to the top plate 3, and the guide post 6 passes through the sliding sleeve 9. The sliding sleeve can reduce the friction between the top plate and the guide post, so as to prevent the top plate from jamming when moving due to the gap caused by friction between the top plate and the guide post. The sliding sleeve can be replaced independently after wear, resulting in low maintenance costs.

[0029] Specifically, a circular end plate 10 is fixedly connected to the outer top of the sliding sleeve 9. The bottom of the circular end plate 10 abuts against the bottom of the limiting groove provided on the top plate 3. A positioning plate 11 fixed to the top plate 3 by bolts abuts against the top of the circular end plate 10. Using the positioning plate 11 fixed by bolts to fix the sliding sleeve can facilitate the disassembly of the sliding sleeve.

[0030] Specifically, the straight ejection assembly includes several straight ejector blocks 12 embedded in the top of the lower template 1. The bottom of each straight ejector block 12 is fixedly connected to the top plate 3 via a straight ejector rod 13. When the top plate moves upward, the straight ejector blocks can be moved upward via the straight ejector rods, thereby ejecting the product from the lower template.

[0031] Specifically, the bottom injection mechanism 5 includes an injection plate 14 disposed between the bottom plate 7 and the top plate 3. An injection tube 15 is fixedly connected to the top of the injection plate 14. The injection tube 15 vertically penetrates the top plate 3 and the lower template 1, and its top end is connected to the automotive trunk mat molding cavity. The injection plate, located below the lower template, can inject molding liquid into the automotive trunk mat molding cavity from below through the injection tube, thereby ensuring that the glue nozzle is formed on the back of the product, reducing the impact of the glue nozzle on the outer surface quality of the product.

[0032] Preferably, the injection molding plate 14 has an I-shaped cross-section and consists of two parallel flow dividers 16 and a connecting plate 17 connecting the two flow dividers 16. The connecting plate 17 and the flow dividers 16 are arranged perpendicularly. Five injection molding tubes 15 are provided, of which four injection molding tubes 15 are respectively located at both ends of the two flow dividers 16, and one injection molding tube 15 is located in the middle of the connecting plate 17. The I-shaped injection molding plate, composed of two flow dividers 16 and one connecting plate 17, can evenly inject the injection molding liquid into the molding cavity of the car trunk mat from five points through the five injection molding tubes, which can improve the injection molding efficiency.

[0033] Specifically, four limiting posts 18 are fixedly connected to the top of the top plate 3. The top of the limiting posts 18 vertically penetrates the lower template 1 and is slidably connected to the lower template 1. The four limiting posts 18 can limit the movement of the top plate.

[0034] The working principle of this utility model is as follows: After the product is injection molded, the top plate moves upward and can push the product out of the lower template through the straight ejection component. The elastic demolding reset component can use the elastic force to drive the top plate to move downward and reset. Therefore, the lifting mechanism that drives the top plate does not need to be fixed to the top plate. The lifting mechanism only needs to be set below the top plate. When the product is ejected, the lifting mechanism applies a pushing force to the top plate from the bottom to drive the top plate to rise. After the product is ejected, the lifting mechanism resets, and the top plate is reset by the elastic demolding reset component 4. The bottom glue injection mechanism can inject glue from below the molding cavity of the car trunk mat, so that the glue opening is formed on the back of the car trunk mat to prevent the glue opening from affecting the quality of the outer surface of the trunk mat.

[0035] When the top plate moves upward, the spring sleeved on the guide column is compressed. When the lifting mechanism resets, the compressed spring resets and drives the top plate to move downward and reset. The sliding sleeve can reduce the friction between the top plate and the guide column to prevent the top plate from jamming when moving due to the gap caused by friction. The sliding sleeve can be replaced independently after wear, resulting in low maintenance costs. The sliding sleeve can be easily disassembled by fixing the positioning plate 11 with bolts. When the top plate moves upward, it can drive the straight push block to move upward through the straight push rod, thereby pushing the product out of the lower template.

[0036] The injection plate located on the lower side of the lower template can inject injection liquid into the car trunk mat molding cavity through the injection tube, thereby enabling the glue gate to be formed on the back of the product to reduce the impact of the glue gate on the outer surface quality of the product. The injection plate with an I-shaped cross section, composed of two diversion plates 16 and a connecting plate 17, can inject injection liquid evenly into the car trunk mat molding cavity from five points through five injection tubes, which can improve injection efficiency. The four limiting posts 18 can limit the top plate when it moves.

[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model 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 this utility model or exceeding the scope defined by the appended claims.

[0038] Although this article frequently uses terms such as lower mold plate 1, lower molding surface 2, top plate 3, elastic demolding and reset assembly 4, bottom injection mechanism 5, guide post 6, bottom plate 7, elastic element 8, sliding sleeve 9, annular end plate 10, positioning plate 11, straight ejector block 12, straight ejector rod 13, injection plate 14, injection tube 15, flow divider 16, connecting plate 17, and limiting post 18, these terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A TPE automotive trunk mat injection molding die elastic demolding and reset structure, comprising a lower template (1), characterized in that, The upper surface of the lower template (1) has a lower forming surface (2) that forms the molding cavity of the car trunk mat. The lower template (1) is also provided with a straight ejection assembly and the straight ejection assembly is connected to the top plate (3) located on the lower side of the lower template (1). An elastic demolding reset assembly (4) is also provided between the top plate (3) and the lower template (1). The lower template (1) is also provided with a bottom glue injection mechanism (5) on the lower side.

2. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding die according to claim 1, characterized in that, The elastic demolding and resetting assembly (4) includes four guide pillars (6) fixed to the bottom of the lower template (1). The bottom of the guide pillars (6) is fixed on the bottom plate (7) located on the lower side of the lower template (1). An elastic element (8) is sleeved on the guide pillars (6). The upper and lower ends of the elastic element (8) abut against the lower template (1) and the top plate (3) respectively.

3. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding die according to claim 2, characterized in that, The elastic element (8) is a spring.

4. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding mold according to claim 3, characterized in that, A sliding sleeve (9) is fixedly connected to the top plate (3), and the guide post (6) passes through the sliding sleeve (9).

5. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding die according to claim 4, characterized in that, The top outer side of the sliding sleeve (9) is fixedly connected to an annular end plate (10), the bottom of the annular end plate (10) abuts against the bottom of the limiting groove provided on the top plate (3), and a positioning plate (11) fixedly connected to the top plate (3) by bolts, the bottom of the positioning plate (11) abuts against the top of the annular end plate (10).

6. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding mold according to claim 1, characterized in that, The straight ejection assembly includes several straight ejection blocks (12) embedded in the top of the lower template (1), and the bottom of the straight ejection blocks (12) is fixedly connected to the top plate (3) by straight ejection rods (13).

7. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding die according to claim 2, characterized in that, The bottom glue injection mechanism (5) includes an injection plate (14) disposed between the bottom plate (7) and the top plate (3). An injection tube (15) is fixedly connected to the top of the injection plate (14). The injection tube (15) vertically penetrates the top plate (3) and the lower template (1) and its top end is connected to the molding cavity of the car trunk mat.

8. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding die according to claim 7, characterized in that, The injection molding plate (14) has an I-shaped cross section and is composed of two parallel flow dividers (16) and a connecting plate (17) connecting the two flow dividers (16). The connecting plate (17) and the flow dividers (16) are arranged perpendicularly.

9. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding die according to claim 8, characterized in that, Five injection tubes (15) are provided, of which four injection tubes (15) are respectively provided at both ends of the two diversion plates (16), and one injection tube (15) is provided in the middle of the connecting plate (17).

10. The elastic demolding and reset structure of the TPE automotive trunk mat injection molding die according to claim 2, characterized in that, The top of the top plate (3) is also fixedly connected to four limiting columns (18), the top of the limiting columns (18) vertically penetrates the lower template (1) and slides with the lower template (1).

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