Forming mold for preparing foaming plastic product
A technology for foaming plastics and forming molds, applied in the chemical industry, can solve the problems of poor overall hardness, easy scratching, poor heat preservation effect, and large particle spacing, and achieve the effects of easy cleaning, good heat preservation effect, and increased hardness
Pending Publication Date: 2019-02-12
SUZHOU FU SHUN PACKING PROD CO LTD
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Problems solved by technology
[0003] At present, it is found that the existing products such as food takeaway boxes and cold chain turnover boxes have poor overall hardness and are easy to scratch, and the waterproof effect and thermal insulation effect are poor due to the large particle distance that makes up the product. Therefore, a new surface molding is needed. In order to solve the above problems, the existing process is to form a mirror surface by closing the particle gap on the surface of the foamed plastic product, but how to effectively realize and ensure one-time molding is an urgent need to be solved, especially for the mold. Changes from existing molding dies
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[0025] This example describes a molding mold for preparing foamed plastic products, including solid mold and mold shifting. After the mold is fixed and mold shifting is closed, foamed plastic particles are injected and then further heated and molded to form the required mold. Foamed plastic products, the solid mold includes a solid mold core 11, and the moving mold includes a moving mold core 21, and the solid mold core 11 and the moving mold core 21 form a mold that matches the shape of the prepared product after mold closing. The die core structure, the transfer die core 21 is made of metal material, the transfer die core 21 is hollowed out to form a cavity, the transfer die core 21 has a smooth surface and no air plug pores.
[0026] The above-mentioned structure can realize the mirror surface of the foamed plastic product on the mold transfer side during the processing and molding process. If the mirror surface of the solid mold side is to be realized, the solid mold core 1...
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Abstract
The invention relates to a forming mold for preparing a foaming plastic product. The forming mold comprises a fixed mold and a movable mold. The fixed mold and the movable mold are assembled, foamingplastic granules are injected, further heating forming is carried out, the foaming plastic product needing to be prepared is formed at a time, the fixed mold comprises a fixed mold core, the movable mold comprises a movable mold core, the fixed mold core and the movable mold core are assembled to form a mold core structure matched with the prepared product in shape, the movable mold core is prepared from metal materials, the movable mold core is hollowed inside to form a cavity, and the surface of the movable mold core is smooth and provided with no air lock air hole. In the forming process ofthe foaming plastic product, lens surfaces can be preferentially selectively formed on one or even more faces, combination gaps among polypropylene granules are completely closed, bacteria breeding can be prevented, the surface smoothness is improved, and the product quality is effectively improved.
Description
technical field [0001] The invention relates to the field of chemical industry, in particular to a molding die for preparing foamed plastic products with a mirror surface. Background technique [0002] In the prior art, foamed plastics are formed by plastic foaming. Foaming molding is the process of making plastics produce microporous structures. Almost all thermosetting and thermoplastic plastics can be made into foamed plastics. Commonly used resins include polystyrene, Polyurethane, polyvinyl chloride, polyethylene, urea formaldehyde, phenolic, polypropylene, etc. Among them, EPP (Expandable Polypropylene, that is, expandable polypropylene) is a new type of high-performance compression-resistant cushioning insulation material with excellent physical properties, stable chemical properties, easy recycling and easy disposal, so it has been rapidly promoted and used in recent years. The molding of EPP products can be roughly divided into two categories. One is to use packagi...
Claims
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IPC IPC(8): B29C44/58B29C44/34
CPCB29C44/3426B29C44/58
Inventor 凌立洋
Owner SUZHOU FU SHUN PACKING PROD CO LTD