Side feeding spiral type continuous extrusion blow molding die head

Abstract

The invention discloses a side feeding spiral type continuous extrusion blow molding die head. The side feeding spiral type continuous extrusion blow molding die head comprises an outer-layer structure and an inner-layer structure. The outer-layer structure comprises an outer die sleeve, an adjusting ring and an opening die, all of which are axially connected and installed in sequence. The inner-layer structure comprises a lifting rod and a core die which are axially connected and installed. The outer die sleeve, the adjusting ring and the opening die are each of an axis hollow structure. The lifting rod is collected in the outer die sleeve and the adjusting ring. The core die is collected in the opening die. The peripheral wall of the lifting rod is sleeved with a flow diverting spiral core which can axially and relatively move, and a material runner is formed between the outer wall faces of the flow diverting spiral core and the core die and the inner wall face of the outer-layer structure. A material groove is formed in the outer wall face of the flow diverting spiral core. The material groove comprises a feeding groove and multiple parallel spiral material distributing grooves, wherein all the spiral material distributing grooves communicate with the feeding groove and are arranged in parallel. A material is evenly divided into circular-ring-shaped non-weld-line pipe blanks after being diverted, the circular-ring-shaped non-weld-line pipe blanks continuously enter the die head along with the molten material, and the circular-ring-shaped pipe blanks are extruded out of the opening die to form pipe blanks meeting blow molding product technology requirements.

Description

technical field [0001] The invention relates to a side feeding screw type continuous extrusion blow molding die head. Background technique [0002] At present, the existing continuous blow molding dies on the market generally adopt a split bracket structure. The disadvantage is that the two or four shunt ribs of the shunt support cut the molten material and then merge to form a tube blank. There is a weld line in the tube blank, and the position of the weld line is easy to break when blowing a larger product, and the product cannot pass the drop test. Contents of the invention [0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a side-feeding spiral continuous extrusion blow molding die head, which can be evenly divided into ring-shaped non-welded line pipe blanks after being divided. The annular tube blank is extruded from the die to form a tube blank that meets the process requirements of blow molding produc...

AI Technical Summary

Problems solved by technology

The disadvantage is that the two or four shunt ribs of the shunt bracket cut the molten material and then join together to form a tube blank. There is a weld line in the tube blank. When blowing a larger product, the position of the weld line is easy to break, and the product cannot pass the drop test.

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