Mold making method of thermal forming plastic suction female mold and female mold

Abstract

The invention provides a mold making method of a thermal forming plastic suction female mold and the female mold. The mold making method of the thermal forming plastic suction female mold comprises the following steps that S1, 3D modeling is performed to construct data of a mold main body model; S2, in the mold main body model, air exhaust channel data formed by communicating a plurality of groupsof air exhaust holes, series holes and a main air outlet hole are constructed, the air exhaust holes penetrate into a cavity of a mold main body, the trend of the series holes is matched with the shape of the bottom wall of the cavity, the series holes are sequentially connected with the plurality of groups of air exhaust holes in series from far to near from the main air outlet hole according tothe distance from the air inlets of the air exhaust holes to the top plane of the mold main body, and the main air outlet hole penetrates out of the mold main body; and S3, the female mold is manufactured in a 3D printing or machining mode according to the construction data. According to the mold making method of the thermal forming plastic suction female mold and the female mold, by adopting thefemale mold, the quality of a vacuum forming product can be effectively guaranteed, the negative pressure during vacuum adsorption can be reasonably utilized, and the vacuum forming production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of a molding method for a thermoforming plastic suction mold, in particular to a molding method for a thermoforming suction molding female mold and the female mold. Background technique [0002] At present, there are two main production methods for the existing vacuum thermoforming molds on the market: 1. Metal machining; 2. 3D printing molding technology. The shape of existing thermoforming blister molds is relatively simple, mainly cubes, spheres, cylinders, etc., and it cannot make ideal shapes for packaging shells (products) with complex structures. The main reason is that the thermoplastic film Due to the limitation of plasticity and expandability, and the mold is difficult to handle the corners of complex shapes, it is impossible to suck out the ideal shape. Therefore, there are more and more existing molds for thermoforming vacuum blisters. For example, the application date is 2018.01.18, the publica...

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Problems solved by technology

[0003] 1. Failure to make reasonable use of the negative pressure during vacuum adsorption affects the production efficiency of blister molding;

[0004] 2. The air extraction holes in the cavity are not designed for position layout, which is easy to reduce the molding quality of the finished product;

[0005] 3. The rounding treatment of the sharp corners, corners and edge positions in the cavity of the main body of the mold is not considered, resulting in poor molding quality of the thermoplastic film at the aforementioned positions;

[0006] 4. Failure to set an appropriate demoulding slope for the cavity in the main body of the mold makes it difficult to ensure the integrity of the blister and affects the smooth demoulding of the finished product (product);

[0007] 5. When opening the air extraction hole, the relationship between it and the minimum wall thickness of the mold body is not considered, and the service life of the entire mold is likely to be reduced due to the unreasonable opening position

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