Reverse knife edge structure, mold and application

Abstract

The invention discloses a reverse knife edge structure, a mold and application. The reverse knife edge structure comprises an upper mold reverse knife edge and a lower mold reverse knife edge. The upper end face of the lower die reverse knife edge is provided with a reverse knife edge tip, and the lower end face of the upper die reverse knife edge is provided with a pressing end face. The tip end of the reverse knife edge is formed by upwarping the end face of the lower die reverse knife edge along the arc-shaped transition edge, and a downwards-protruding V-shaped pressing edge is arranged at the position, right opposite to the arc-shaped transition edge, of the pressing end face of the upper die reverse knife edge. According to the invention, a reverse knife edge structure in which a flat collision knife edge is arranged on the lower die is designed, so that the effects of avoiding scraping, orange peel, edge opening and white leakage are achieved, and a complete finished product is obtained; when the trunk rear partition plate is produced, a reverse knife edge structure, a half knife edge structure and a cutting knife edge structure are comprehensively utilized, and the defect that a common one-time punching forming die in the industry cannot avoid the quality defects of scraping, orange peel, edge opening and white leakage or the defect that the cost of a secondary process and die design for avoiding white leakage during secondary punching and edge sealing is high is overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and in particular relates to a reverse blade structure, a mold and an application thereof. Background Art

[0002] The mainstream automobile trunk rear partition mold is currently divided into two forms: 1) The first type: one-time molding shear blade mold and process, which has the advantages of low cost, simple process, and high production efficiency, but has quality defects such as white leakage, orange peel edge of the vertical edge, and easy scratching; 2) The second type: In order to avoid appearance defects such as white leakage, orange peel edge of the vertical edge, and anti-scratch, the side secondary slider punching mold process can achieve the purpose of edge sealing without white leakage and anti-scratch, but its cost is relatively high, and the appearance of the A side is prone to slider gap indentation, which is difficult to achieve beautiful quality. This requires seeking a new low-cost technical solution: that is, it can achieve high-quality appearance effects such as avoiding white leakage and orange peel cracking, and has good anti-scratch performance, and can also avoid the technical solution of slider side cutting at a low cost to improve production efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a reverse blade structure, a mold and an application thereof to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a reverse blade structure, comprising an upper die reverse blade and a lower die reverse blade;

[0005] The upper end surface of the reverse blade of the lower die is provided with a reverse blade tip, and the lower end surface of the reverse blade of the upper die is provided with a material pressing end surface;

[0006] The tip of the reverse blade is formed by the end face of the reverse blade of the lower die rising up along the arc transition edge, and a downward convex V-shaped pressing edge is arranged at the pressing end face of the reverse blade of the upper die facing the arc transition edge.

[0007] It should be noted in the scheme that the V-shaped pressing edge has a long side and a short side, and the short side is close to the side of the anti-blade tip.

[0008] It is further worth noting that the width of the V-shaped edge is between 3mm and 5mm, and the thickness is between 1.5mm and 2mm.

[0009] It is further worth mentioning that it also includes a reverse blade avoidance position, which is achieved by lifting the lower end surface of the reverse blade of the upper die and creating a gap with the upper end surface of the reverse blade of the lower die.

[0010] A mold comprises the above-mentioned reverse knife edge structure.

[0011] It should be further explained that, when in use, when the angle between the product contour and the demoulding direction is 7°-10°, the above-mentioned reverse blade structure is used for cutting.

[0012] It should be further explained that it also includes a flat-contact half-blade structure, which includes an upper mold half-blade and a lower mold half-blade. The upper mold half-blade is provided with an upper mold blade tip on one side relative to the lower mold half-blade, and the lower mold half-blade is provided with a lower mold blade tip on one side relative to the upper mold half-blade.

[0013] It should be further explained that the matching amount between the tip of the upper die blade and the tip of the lower die blade is between 1mm and 5mm.

[0014] It should be further explained that when the angle between the product contour and the demoulding direction is less than 7°, a flat-impact half-blade structure is used for cutting.

[0015] An application of a mold, using the above-mentioned mold, the mold also includes a cutting edge, the cutting edge includes an upper mold flat edge and a lower mold flat edge;

[0016] The mold is used in the production of a rear partition of a car trunk. The outer contour of the rear partition of the trunk is cut and formed by a flat-contact half-blade structure, the side mounting holes of the rear partition of the trunk are cut and formed by a reverse blade structure, and the sinking grooves on both sides of the rear partition of the trunk are cut and formed by a cutting blade.

[0017] Compared with the prior art, the reverse blade structure, mold and application provided by the present invention have at least the following beneficial effects:

[0018] The present invention designs a reverse blade structure in which a flat blade is arranged on the lower die, so as to achieve the effects of no scratching, orange peel, edge opening, and no white leakage, and obtain a complete finished product;

[0019] When producing the rear partition of the luggage box, the reverse blade structure, half blade structure and cutting blade structure are comprehensively utilized to solve the quality defects of ordinary one-time punching and forming molds in the industry, which cannot avoid scratches, orange peel, open edges, and white leakage, or the secondary process of secondary punching and edge sealing to avoid white leakage and the high cost of mold design. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the lower mold structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the upper mold structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the rear partition structure of the luggage box of the present invention;

[0023] Figure 4 This is a schematic diagram of the cutting blade structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the reverse knife edge structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the half-knife edge structure of the present invention;

[0026] Figure 7 It is a schematic diagram of an existing common knife edge structure. DETAILED DESCRIPTION

[0027] See also Figure 1-7 The present invention provides a reverse blade structure, a mold and an application.

[0028] A reverse blade structure, see Figure 5 As shown, it includes an upper die reverse cutting edge 42 and a lower die reverse cutting edge 23;

[0029] The upper end surface of the lower die reverse blade 23 is provided with a reverse blade tip 231, and the lower end surface of the upper die reverse blade 42 is provided with a material pressing end surface 421;

[0030] The reverse blade tip 231 is formed by the end surface of the lower die reverse blade 23 being raised along the arc transition edge 232, and a downward convex V-shaped pressing edge is provided at the material pressing end surface 421 of the upper die reverse blade 42 and directly opposite to the arc transition edge 232. The V-shaped pressing edge has a long side and a short side, and the short side is close to one side of the reverse blade tip 231. The width of the V-shaped pressing edge is between 3 mm and 5 mm, and the thickness is between 1.5 mm and 2 mm.

[0031] It also includes a reverse blade avoidance position 001, which is achieved by lifting the lower end surface of the upper die reverse blade 42 and creating a gap with the upper end surface of the lower die reverse blade 23.

[0032] Reference Figure 7 In the conventional ordinary blade, the tip of the blade is set on the upper die. When shearing, the tip presses the cutting plate from top to bottom. In the reverse blade structure of this embodiment, the tip of the reverse blade 231 is set on the lower die. When shearing, the upper die presses the plate from top to bottom, and the tip of the reverse blade 231 shears upward from the bottom of the strip. The shearing end is always at the bottom of the plate, thus avoiding the quality defects of product A surface scratching, orange peel, open edge, and white leakage. In addition, when shearing, the V-shaped edge pressing involved presses the plate downward, which is also conducive to improving the shearing effect.

[0033] Based on the above-mentioned reverse blade structure, this embodiment further proposes a mold, and this embodiment is preferably used for producing a luggage compartment rear partition mold.

[0034] Specific reference Figure 1 as well as Figure 2 As shown, the mold includes the above-mentioned reverse blade structure, and the mold includes an upper mold and a lower mold. The upper mold includes an upper mold core 4, an upper mold guide mechanism 44 and an upper mold frame 5, and the lower mold includes a lower mold core 2, a lower mold guide mechanism 21 and a lower mold frame 3.

[0035] The reverse blade structure is assembled on the upper die and the lower die. In addition to the reverse blade structure, a flat half blade structure is also assembled on the die.

[0036] Reference Figure 1 , Figure 2 as well as Figure 6 As shown, the flat-contact blade structure includes a die half blade 41 and a lower die half blade 22. The upper die half blade 41 is provided with an upper die blade tip 411 on one side relative to the lower die half blade 22, and the lower die half blade 22 is provided with a lower die blade tip 221 on one side relative to the upper die half blade 41. The matching amount between the upper die blade tip 411 and the lower die blade tip 221 is between 1 mm and 5 mm.

[0037] The design concept of the flat half blade structure is to divide the tip structure into two halves based on the traditional ordinary blade, and set them in the upper mold and lower mold respectively. The blade structure of the upper and lower mold halves is equivalent to doubling the mold release angle.

[0038] Reference Figure 3 As shown, the outer contour of the rear partition of the luggage compartment is cut and formed by a flat-contact half-blade structure, and the side mounting hole A of the rear partition of the luggage compartment is cut and formed by a reverse blade structure.

[0039] The main basis is: when the angle between the product contour and the direction of the mold is less than 7°, the flat half-blade structure is used for cutting. It can achieve high-level precision processing close to the industry average of 15° and higher than 10°. Through special structural design, the quality of the blade is easily guaranteed.

[0040] When the angle between the product contour and the demoulding direction is 7°-10°, the reverse blade structure is used for cutting and forming.

[0041] The flat reverse blade and half blade structure design form the reverse guide for cutting. The A-side fabric is punched and cut in one step, so that the slope of the vertical surface A is only about 7°, which can obtain a high-quality appearance; through the unique structural design, the defects of orange peel edge, scratches and white leakage on the vertical edge of the rear partition are avoided, and the shortcomings of the cost-increasing process mold solution of ordinary secondary punching are avoided, so as to achieve the effect of avoiding secondary punching process, avoiding scratches, orange peels, and white leakage, thereby achieving the purpose of reducing costs and improving quality.

[0042] In addition, refer to Figure 1 , Figure 2 as well as Figure 4 As shown, the mold also includes a cutting edge, which includes an upper mold flat impact edge 43 and a lower mold flat impact edge 24. The cutting edge is used to cut the two side sinking grooves B of the rear partition of the luggage box. By comprehensively utilizing the cutting edge, the edge structure, and the half edge structure, one-time forming and punching can achieve high quality and low cost.

Claims

1. A reverse knife edge structure, characterized in that: It includes an upper die reverse cutting edge (42) and a lower die reverse cutting edge (23); The upper end surface of the lower die reverse blade (23) is provided with a reverse blade tip (231), and the lower end surface of the upper die reverse blade (42) is provided with a material pressing end surface (421); The reverse blade tip (231) is formed by the end surface of the lower die reverse blade (23) being tilted upward along the arc-shaped transition edge (232), and a downwardly convex V-shaped pressing edge is provided at the material pressing end surface (421) of the upper die reverse blade (42) directly opposite to the arc-shaped transition edge (232).

2. The reverse knife-edge structure according to claim 1, characterized in that: The V-shaped pressing edge has a long side and a short side, and the short side is close to the side of the reverse blade tip (231).

3. The reverse knife edge structure according to claim 2, characterized in that: The width of the V-shaped edge is between 3mm and 5mm, and the thickness is between 1.5mm and 2mm.

4. The reverse knife-edge structure according to claim 1, characterized in that: It also includes a reverse blade avoidance position (001), which is achieved by lifting the lower end surface of the reverse blade (42) of the upper die to create a gap with the upper end surface of the reverse blade (23) of the lower die.

5. A mold, characterized in that: The invention comprises a reverse knife edge structure as described in any one of claims 1 to 4.

6. A mold according to claim 5, characterized in that: When in use, when the angle between the product contour and the demoulding direction is 7°-10°, the reverse blade structure described in any one of claims 1-4 is used for cutting.

7. A mold according to claim 5, characterized in that: The invention also includes a flat-contact half-blade structure, which includes an upper mold half-blade (41) and a lower mold half-blade (22). The upper mold half-blade (41) is provided with an upper mold blade tip (411) on one side relative to the lower mold half-blade (22), and the lower mold half-blade (22) is provided with a lower mold blade tip (221) on one side relative to the upper mold half-blade (41).

8. A mold according to claim 7, characterized in that: The matching amount between the upper die blade tip (411) and the lower die blade tip (221) is between 1 mm and 5 mm.

9. A mold according to claim 8, characterized in that: During use, when the angle between the product contour and the demoulding direction is less than 7°, a flat-impact half-blade structure is used for cutting.

10. An application of a mold, characterized in that: A mold as claimed in claim 9 is used, wherein the mold further comprises a cutting edge, and the cutting edge comprises an upper mold flat contact edge (43) and a lower mold flat contact edge (24); The mold is used in the production of a rear partition of a car trunk. The outer contour of the rear partition of the trunk is cut and formed by a flat-contact half-blade structure, the side mounting holes of the rear partition of the trunk are cut and formed by a reverse blade structure, and the sinking grooves on both sides of the rear partition of the trunk are cut and formed by a cutting blade.

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