Method for processing container with deep wall

Abstract

The invention relates to a processing method of a deep wall container, the method comprises the following steps: a die assembly is arranged and clamped on an injection mold machine, to lead the sprue mouth of the injection mold machine to being oppositely connected with the feeding hole of the die assembly, and to form a closed fluid channel; a solid granular or powder raw material is warmed up to a molten status, under the rotating and extruding function of a threaded rod, the raw material is pressed into the feeding hole of the die assembly through the sprue mouth; the raw material enters and fills up a cavity through the fluid channel; a product is formed through dwelling, cooling and solidifying, and then the product is taken out by opening the fluid channel. The invention is characterized in that the raw material is HDPE material with melt index less than 2.0g / 10 min; at least two feed points are arranged on the mouth edge of the container of the fluid channel, and a feeding hole is arranged on the inner wall bottom face of the container. The invention can lead the material with melt index less than 2.0g / 10 min which can not be used for injection mold and processing to be used for processing a plastic product, and enable the material performance to be good, the service life to being long, the mouth edge strength to be high, the impact strength to be high, and the sealing property to be good.

Description

technical field [0001] The invention relates to a processing method of a hollow plastic container, in particular to a processing method of an HDPE deep-wall container which can be used on an ordinary injection molding machine and is applicable to a melt flow rate of less than 2.0g / 10min, and belongs to the plastic processing technology field. Background technique [0002] The melt flow rate, or melt index (MI), refers to the quality of the melt of a thermoplastic resin passing through a standard capillary within 10 minutes at a certain temperature and load. (For polyethylene, the temperature is 190° and the load is 21.17N). [0003] HDPE stands for low-pressure high-density polyethylene. The HDPE material itself has good chemical stability and has corrosion resistance to acids, alkalis and salt water melts. Its melt index (MI) is inversely proportional to molecular weight, the larger the molecular weight, the smaller the melt index; the smaller the molecular weight, the la...

AI Technical Summary

Problems solved by technology

But it also has its shortcomings: empty barrels and solid barrels occupy the same space, which makes the transportation cost high, and companies using this type of container need a huge space; in addition, the inner wall of the container is naturally solidified, and its inner wall roughness is large Containing viscous materials, there is a serious "wall hanging" phenomenon

However, solidification and shaping are relatively difficult. The larger the product area, the longer the cooling time, and the longer the processing cycle (about 3 minutes per mold for general products, and 30 minutes or longer for thermal model cores and mold cavities). Larger power consumption and processing costs It is very high, so the products produced by this method cannot be accepted by the market

[0015] 3. Multi-point feeding: Traditional multi-point feeding, usually hot runner feeding on the same plane, is difficult to form for deep-walled containers (container height H / bottom diameter φ>1, volume V>25L)

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