Blow molding machine preform variable pitch device

Abstract

The invention discloses a preform pitch changing device for a bottle blowing machine, which comprises a guide rod, several connecting rods, several push rods, several sets of preform clamping mechanisms and a linear drive device. The push rod is installed on the guide rod along the axial direction of the guide rod, the lower end of each push rod is installed with the preform clamping mechanism, the middle part of the connecting rod is hinged with each other through the intermediate hinge shaft, and the two parts of the connecting rod are hinged with each other. The ends are respectively hinged with the corresponding ends of the adjacent connecting rods through the side hinge shafts, and several connecting rods form a number of equilateral rhombus connected in sequence with the vertices shared, and the first intermediate hinge shaft closest to the heating device is fixed to the machine. On the frame, the other intermediate hinge shafts and the push rods are fixed in one-to-one correspondence, and the linear drive device is fixed on the frame and connected with the intermediate hinge shafts or the push rods. The variable pitch device can synchronously change the pitch of the preforms after heating, and there is no time difference when the preforms are changed in pitch.

Description

technical field [0001] The invention relates to a variable pitch device, in particular to a bottle blank variable pitch device for a bottle blowing machine. Background technique [0002] In recent years, China's beverage industry has developed rapidly, and it has driven the rapid development of beverage machinery. The blow molding machine is a commonly used machine for producing beverage bottles in beverage machinery factories, and the heating energy consumption of the blow molding machine is the entire production line. The largest part of the blow molding machine, the traditional blow molding machine does not have a variable pitch device, the distance between the preform seat and the cavity of the mold is equidistant, resulting in a greatly reduced heat utilization rate of the heating lamp tube, through the variable pitch mechanism of the blow molding machine preform can be Realize that when the preform is heated, the distance between the preform and the preform is smaller ...

AI Technical Summary

Problems solved by technology

This structure requires a cylinder with a very large stroke to complete the above actions. At the same time, the variable pitches of several preforms are not synchronized, and there is a time difference between them. The time difference between the first preform and the last preform is the largest, which will cause the heated bottle Sticking between blanks, the movement is not smooth, resulting in an increase in the scrap rate

The preform slides, and the guide head at the lower end of the push rod needs to move down and insert into the preform mouth, so as to drive the preform to slide on the guide rail to change the pitch. After the variable pitch is completed, it needs to move up and separate from the preform mouth. The movement is realized by the cylinder driving the preform variable pitch mechanism of the blow molding machine to move up and down, and the action response is slow and the efficiency is low

[0004] The disadvantages of the preform variable pitch mechanism of the above blow molding machine are: the time difference of the preform variable pitch will cause the heated preform to stick, the motion will not be smooth and the waste will increase, and the push rod guide head will take time to insert into the preform mouth and the efficiency will be low.

Images