Full-automatic bottle blowing method for large-capacity PP bottles

Abstract

According to the full-automatic bottle blowing method for the large-capacity PP bottles, a bottle blank overturning and feeding procedure is arranged between a bottle blank feeding procedure and a bottle blank circulating preheating procedure in a transition mode, and the upper end and the lower end of an overturning and feeding module are connected with a blank feeding module and a constant-temperature preheating module correspondingly; the blank supply module and the overturning blank conveying module are matched to continuously overturn and supply bottle blanks to the constant-temperature preheating module, and the bottle blank circulating preheating procedure is used for preheating the bottle blanks in a multi-stage preheating mode that heating and cooling circulation are alternated, and then the bottle blanks are transferred to a bottle blowing station for blow molding in a variable-pitch mode through the variable-pitch transfer procedure. Molded bottles are continuously output through a finished product transferring procedure, all procedures in the whole production process are efficiently matched, the production efficiency is greatly improved, the bottle blowing quality is guaranteed, and the full-automatic bottle blowing machine is particularly suitable for full-automatic production of large-capacity plastic bottles made of special materials.

Description

technical field [0001] The invention relates to the technical field of blow molding machines, in particular to an automatic blow molding method for large-capacity PP bottles. Background technique [0002] Blow molding machine is a kind of equipment that makes plastic pellets, plastic preforms, etc. into hollow containers through blow molding process. The more common models include one-shot hollow extrusion blowers using PP and PE, and PET, PC or PP. Stretch blow molding machine for double molding, and the newly developed multi-layer hollow extrusion blow molding and stretch blow molding. The bottle blowing machine generally includes a frame and a heating structure, a separation structure, a conveying structure, a bottle blowing structure and a mold clamping structure arranged on the frame. During processing, the heating structure heats and softens the preforms, the separation structure receives the heated and softened preforms and divides them to a distance matching each ca...

AI Technical Summary

Problems solved by technology

[0004] However, for large-capacity pp bottles, due to their good fluidity and sensitivity to temperature, they have high requirements for the preform heating process. The preform heating structure in the existing technical scheme is difficult to control the uniform heating inside and outside the preform. In addition, the bottle The billet is usually preheated in an inverted state. The existing technology cannot adapt to the continuous feeding speed to realize continuous flipping and feeding. The degree of automation between processes is poor, which reduces production efficiency.

Therefore, there is still a lack of fully automatic blow molding methods for bottles of special materials and special specifications.

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