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Injection molding die for fiber reinforced starch composite material and process thereof

A composite material and injection molding technology, which is applied in the field of starch composite material preparation, can solve the problems of high energy consumption of pulp molding, low yield, difficulty in filling plastic resin molding, etc., and achieves low demoulding angle, good molding stability, high intensity effect

Inactive Publication Date: 2020-04-03
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a fiber-reinforced starch composite material injection molding mold and its process for the rapid production of fully degradable fiber-reinforced starch for the problems of difficult molding of starch and plant fiber-filled plastic resin, high energy consumption and low yield of pulp molding Composite products

Method used

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  • Injection molding die for fiber reinforced starch composite material and process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, a fiber-reinforced starch composite material injection molding mold includes a female mold base 1 and a male mold 2. The recess of the female mold base 1 is provided with a screen 3, and there are drainage holes 5 on the screen 3. The female mold base The edge of the seat 1 is also provided with a positioning shoulder 4, the screen 3 is fixed on the base of the master mold 1 through the positioning shoulder 4 and the support foot 6, and the discharge channel 7 formed between the screen 3 and the base of the master mold 1 is used for moisture. Exhaust and input of compressed gas; air inlet 9 is arranged inside the base of the master mold, and a drain outlet 8 is arranged at the lower part, and one end of the air inlet 9 and the outlet 8 are connected with the internal discharge channel 7 . The male mold 2 is provided with a feed inlet 11 and a tapered feed flow channel 12 , and the surface of the male mold 2 is also provided with a heating flow...

Embodiment 2

[0021] A fiber-reinforced starch composite material injection molding process, comprising the following steps:

[0022] S1: Mix starch, water, fiber and processing aids to form a composite material slurry, and quickly inject it into the male die 2 and the female die through the feed port 11 and the feed flow channel 12 on the male die 2 through the injection screw extruder cavities between molds;

[0023] S2: Introduce high-temperature heat-conducting oil into the heating channel 10 of the male mold 2, and the slurry in the mold cavity is quickly evaporated by the hot water and passes through the drainage hole 5 on the screen 3, and the gap between the screen 3 and the base of the female mold The discharge channel 7 and the drain port 8 are discharged until the product is dried and shaped;

[0024] S3: The male mold 2 is separated from the female mold, and compressed air is blown in through the air inlet 9, and the compressed air enters the cavity through the discharge channe...

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Abstract

The invention relates to an injection molding die for a fiber reinforced starch composite material and a process thereof. The injection molding die comprises a female die base and a male die, whereina notch of the female die base is provided with a screen mesh, water drainage holes are formed in the screen mesh, the screen mesh is connected with the female die base through supporting legs, a discharge channel is formed between the screen mesh and the female die base, a water drainage port and an air inlet port are formed in the female die base, a positioning shoulder is further arranged at the edge of the female die base, and the male die is provided with a feeding port and a conical feeding flow channel. A fiber reinforced starch composite material special-shaped product prepared by theprocess is high in size precision, high in strength and good in molding stability, and relative to a product prepared by a paper pulp wood plastic molding process, the molding demolding angle is lower, and can reach 0.5 degree.

Description

technical field [0001] The invention relates to the field of starch composite material preparation, and more specifically, relates to a fiber-reinforced starch composite material injection molding mold and a process thereof. Background technique [0002] Starch is a renewable and recyclable green material from natural plants. It can not only be used as food for human use, but also widely used in the fields of chemical industry and new materials to prepare various composite materials. Because of its excellent biodegradable properties, starch is usually used as a filler to prepare thermoplastic bio-based composites with high bio-carbon content, which are widely used in disposable products. In the current environment where petrochemical resources are increasingly scarce and white pollution is becoming more and more serious. people's attention. As another natural renewable resource, plant fiber has a wide range of sources, and is used as the main raw material of bio-based compo...

Claims

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Application Information

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IPC IPC(8): B29C45/26B29C45/27B29C45/43B29C45/73
CPCB29C45/26B29C45/27B29C45/43B29C45/73
Inventor 曾广胜江太君尹琛孟聪陈一胡灿刘水长
Owner HUNAN UNIV OF TECH