Hard PC material small size product no hair silk die cutting die

Abstract

The utility model relates to a kind of hard PC material small-size product's no hair silk die cutting production process, including step a, first in the smooth surface of PC raw material composite specification is 300-500G silica gel protective film;Step b, using hardening high speed steel suction waste cutter die to carry out punching, the cutting edge of hardening high speed steel suction waste cutter die one side is straight surface, the other side is inclined surface, straight surface side contact is PC product, inclined surface contact is PC waste, and the included angle of straight surface and longitudinal base surface is 0 °-5 °, the included angle of inclined surface and longitudinal base surface is 40 °-50 °, after punching, PC waste outside frame is obtained no hair silk PC product.The utility model is replaced by original need two groups of cutter die, twice punching process as a group of cutter die once die cutting by the above process and specially designed die cutting cutter die, improve product precision, improve cutter edge angle, cutter die hardness and other parameters, make product and outer frame waste between the most possible even pressure, realize stable die cutting, avoid the phenomenon that PC product appears hair silk or sawtooth edge.

Description

Technical Field

[0001] This utility model relates to the field of precision die-cutting component production technology, specifically a burr-free die-cutting die for small-sized products made of rigid PC material. Background Technology

[0002] Precision electronic products such as mobile phones, tablets, and headphones sometimes require small-sized rigid PC (plastic) components with dimensions less than 10 mm in length and width and a thickness less than 1 mm. For die-cutting these products using traditional metal die-cutting molds, a two-stage die-cutting process is typically required. Based on the layout of the PC product on the raw material, the first die-cut removes most of the PC waste around the perimeter of the larger piece, retaining only a slightly larger area of ​​semi-finished PC. The second die-cut then cuts the finished PC product from this semi-finished area. For some rigid PC products, this process can reduce defects such as burrs and serrations to some extent. However, due to the potential for dimensional errors caused by the two-stage die-cutting alignment, the overall product yield remains low. Furthermore, some customers specify PC materials with high hardness and toughness, making them prone to chipping when die-cut using ordinary metal tools. This still easily leads to burrs and serrations on the product edges, requiring further improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a burr-free die-cutting mold for small-sized products made of rigid PC material.

[0004] The technical solution adopted in this utility model is: a burr-free die-cutting die for small-sized products made of rigid PC material, including a die body, which is a hardened high-speed steel waste-absorbing die. The die has an array of closed blades, wherein the inner blade surface of the closed blade is a straight surface and the outer blade surface is an inclined surface. The straight surface contacts the PC product, and the inclined surface contacts the PC waste. The angle between the inner blade surface and the longitudinal base plane is 0°-5°, and the angle between the inclined surface and the longitudinal base plane is 40°-50°. The inner blade surface forms an inner cavity for the PC products to be stacked and passed through. The die opposite to the die is provided with an ejection mechanism corresponding to the position of the closed blades.

[0005] The closed cutting edge is divided into two groups of three, which are staggered to facilitate the processing of the die and the waste removal operation.

[0006] This invention, through the above-mentioned process and a specially designed die-cutting die, replaces the original process requiring two sets of dies and two punching operations with a single die for one die-cutting operation. This reduces process tolerances caused by misalignment, improves product precision, and further improves parameters such as blade angle and die hardness. It maximizes the pressure between the product and the outer frame waste, achieving stable die-cutting and avoiding burrs or serrated edges on PC products. It is especially suitable for die-cutting rigid, thick, small-sized PC products. Attached Figure Description

[0007] Figure 1 , Figure 2 This is a schematic diagram of the die-cutting die and the die-cutting effect in the process of this utility model; Figure 3 , Figure 4 These are a plan view and a cross-sectional view of a die-cutting die according to an embodiment of this utility model; Detailed Implementation

[0008] like Figures 1-4 As shown, this utility model describes a lint-free die-cutting process for small-sized rigid PC material products. The die-cutting process includes the following steps: Step a, first laminate a silicone protective film 2 with a specification of 300-500G onto the smooth surface of PC raw material 1; Step b involves punching with a hardened high-speed steel waste-absorbing die. The die has a straight surface 301 on one side and an inclined surface 302 on the other. The straight surface 301 contacts the PC product, while the inclined surface 302 contacts the PC waste. The angle between the straight surface 301 and the longitudinal base plane is 0°-5°, and the angle between the inclined surface 302 and the longitudinal base plane is 40°-50°. After punching, the PC waste outside the frame is removed to obtain a lint-free PC product.

[0009] By using a die made of hardened high-speed steel, a large angle of inclination, and a waste removal process during die cutting, we strive to create maximum pressure between the PC product and the outer frame waste. This ensures that the vertical shearing force per unit area along the entire cutting contour is infinitely consistent, achieving stable die cutting, avoiding fuzzy or jagged edges on the PC product, and improving the product qualification rate.

[0010] The die-cutting template of the hardened high-speed steel waste-absorbing die is located on the lower die assembly, with the blade facing upwards. The silicone protective film faces upwards and the PC raw material faces downwards for punching (i.e., the blade is below and the material is above). The blade's entry depth is just enough to cut through the PC raw material without cutting through the silicone protective film. An inner cavity is formed within the blade frame of the die-cutting template for the PC products to stack and pass through. After die-cutting is completed, the PC products in the frame are pushed off by the ejection mechanism in the upper die assembly (such as using a spring, polyurethane (PU) glue rod, or pneumatic ejector pin) and separated from the silicone protective film, falling into the inner cavity and being collected. The hardened high-speed steel waste suction die has a cutting edge hardness of HRC 65 or higher.

[0011] This production process is suitable for die-cutting PC products with length and width dimensions less than 10 mm and thickness greater than 0.5 mm.

[0012] This utility model also provides a burr-free die-cutting die for small-sized products made of rigid PC material, including a die body 4. The die body 4 is a hardened high-speed steel waste-absorbing die, which has an array of closed blades 41. The inner blade surface of the closed blade 41 is a straight surface, and the outer blade surface is an inclined surface. The straight surface contacts the PC product, and the inclined surface contacts the PC waste. The angle between the inner blade surface and the longitudinal base plane is 0°-5°, and the angle between the inclined surface and the longitudinal base plane is 40°-50°. The inner blade surface forms an inner cavity 42 for the PC products to be stacked and passed through. The die opposite to the die is provided with an ejection mechanism (not shown in the figure) corresponding to the position of the closed blades 41.

[0013] The closed cutting edge 41 is divided into two groups of three, which are staggered to facilitate the processing of the die and the waste removal operation.

[0014] This invention, through the above-mentioned process and a specially designed die-cutting die, replaces the original process requiring two sets of dies and two punching operations with a single die for one die-cutting operation. This reduces process tolerances caused by misalignment, improves product precision, and further improves parameters such as blade angle and die hardness. It maximizes the pressure between the product and the outer frame waste, achieving stable die-cutting and avoiding burrs or serrated edges on PC products. It is especially suitable for die-cutting rigid, thick, small-sized PC products.

[0015] The above embodiments are merely exemplary implementations used to illustrate the principles of this utility model; however, this utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A burr-free die-cutting die for small-sized products made of rigid PC material, comprising a die body, characterized in that: The main body of the die-cutting mold is a hardened high-speed steel waste-absorbing die-cutting mold. The die-cutting mold has an array of closed cutting edges. The inner cutting edge of the closed cutting edge is a straight surface, and the outer cutting edge is an inclined surface. The straight surface contacts the PC product, and the inclined surface contacts the PC waste. The angle between the inner cutting edge and the longitudinal base plane is 0°-5°, and the angle between the inclined surface and the longitudinal base plane is 40°-50°. The inner cutting edge forms an inner cavity for the PC products to be stacked and passed through. The die-pressing mold opposite to the die-cutting mold is equipped with an ejection mechanism corresponding to the position of the closed cutting edge.

2. The burr-free die-cutting mold for small-sized products made of rigid PC material according to claim 1, characterized in that: The closed blades are divided into two groups of three, with adjacent closed blades arranged in a staggered manner.

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