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Helmet manufacture method and products thereof

A manufacturing method and helmet technology, which is applied in helmets, layered products, hat products, etc., can solve hidden safety concerns and other problems, and achieve the effect of good quality, good waterproof, and crisp appearance

Inactive Publication Date: 2009-04-29
UNION PLASTIC HANGZHOU MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this situation, there will still be safety concerns when the human body comes into contact with the foamed product

Method used

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  • Helmet manufacture method and products thereof
  • Helmet manufacture method and products thereof
  • Helmet manufacture method and products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] Refer to attached Figure 1-8 :

[0046] The manufacture method of plastic helmet of the present invention, comprises the steps:

[0047] 1. Make the injection mold of plastic helmet, and described mold has the overall appearance of described helmet;

[0048] 2. Inject plastic and gas into the feeding barrel 1, heat and stir with the screw 12 to melt the aforementioned plastic and mix with the aforementioned gas to form a mixed foamed plastic melt;

[0049] 3. Introduce the aforementioned mixed foamed plastic melt into the first storage barrel 2;

[0050] 4. Extrude the plastic melt with a capacity suitable for one shot out of the first accumulator barrel 2, and at the same time perform pressure control and compensation in the cavity of the first accumulator barrel 2 to maintain the first accumulator barrel 2. Stable pressure in the 2 cavities of the storage barrel;

[0051] 5. The plastic melt that is pressed out of the first storage barrel 2 is introduced into the s...

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Abstract

The invention relates to a manufacturing method of a helmet, comprising the following steps: manufacturing an injection mold of a plastic helmet; manufacturing mixed foamed plastic liquid, leading the liquid into a first storage machine barrel, extruding the liquid out of the first storage machine barrel, then leading the liquid into an injection machine barrel by a first check valve, simultaneously feeding materials into the first storage machine barrel by a feeding machine barrel, pressurizing the injection machine barrel, carrying injection until the mold is molded, firstly cooling the surface of the plastic liquid, measuring the current amount of injection of the injection machine barrel and the current output speed of the feeding machine barrel, adjusting the output speed of the feeding machine barrel, adjusting the rotating speed of a screw of the feeding machine barrel so as to control the feeding speed of the plastics and simultaneously adjusting the admission speed so as to match the feeding speed of the plastics. The product obtained according to the method comprises a lining which is coated by an outer layer; the helmet product obtained according to the method comprises the outer layer which does not contain bubbles or contains few bubbles and an inner core containing bubbles; and the inner core is coated by the outer layer.

Description

technical field [0001] The invention relates to a manufacturing method and a product of a plastic helmet. Background technique [0002] The known helmets, such as hard hats, engineering hats, miners' hats, etc. are mostly made of pure plastic by injection molding. This method consumes more plastic. With the rise of oil prices, people are eager to save raw materials. In addition, pure plastic products have poor impact resistance and poor shock absorption. The outside of the helmet can be easily cracked by objects, and the inner lining of the helmet cannot relieve the impact, so it cannot protect personal safety well. [0003] Moreover, the shell and inner lining of the helmet need to be manufactured separately and assembled again, which is a complex process. [0004] The use of foamed plastics to make the helmet does not affect the use of the helmet, and can obviously save raw materials, and the foamed plastics has good impact resistance, which can make the helmet durable an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/17B29C45/46B29C45/76B29C45/62A42B3/00B32B5/18B32B5/32
CPCA42C2/002
Inventor 陆纬庭陆孝庭
Owner UNION PLASTIC HANGZHOU MACHINERY
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