Link mechanism for opening and closing die set and lifting bottom die of bottle blowing machine

Abstract

The invention discloses a link mechanism for opening and closing a die set and lifting a bottom die of a bottle blowing machine. The link mechanism comprises an opening-closing die connecting rod for driving the die set of the bottle blowing machine to open and close, wherein the opening-closing die connecting rod can be shaken under drive of a driving device; one end of a joint bearing connecting rod is connected with the opening-closing die connecting rod, while the other end of the joint bearing connecting rod is connected with a sliding block, wherein the sliding block can be mounted on a die set bracket in a horizontal and sliding manner; a driving seat is fixed on the sliding block; a bottom die lifting guide board with a height difference curve sliding way is fixed on the bottom die bracket for driving a bottom die to lift; and the driving seat is connected with a driving shaft, wherein the end part of the driving shaft can be extended into the curve sliding way and can slide in the curve sliding way. The link mechanism has the following beneficial effects: 1, size of the bottle blowing machine can be effectively reduced and a space utilization rate of a manufacturing shop can be improved; 2, noise intensity can be greatly reduced and service lives of corresponding parts can be prolonged; and 3, matching precision can be guaranteed easily and difficulty in manufacture, technology and installation of the corresponding parts can be reduced; and production cost can be reduced.

Description

technical field [0001] The invention relates to a linkage mechanism that can drive the bottom mold on the bottle blowing machine to go up and down when the mold frame is driven to open and close. Background technique [0002] A plurality of forming molds for forming plastic bottles are distributed on the bottle blowing machine. The forming molds generally include a left mold, a right mold and a bottom mold. The left mold, the right mold and the bottom mold can be driven by their respective driving mechanisms The phases are separated or closed to realize the opening or closing of the forming mold, so that the mold can be opened at the feeding station to put the preform into its cavity, and the mold can be closed at the forming station to blow the preform in the cavity. Forming, and opening the mold at the bottle output station to take out the formed plastic bottle and transport it to the next process. Therefore, accurate control of the movement of the left mold, right mold ...

AI Technical Summary

Problems solved by technology

[0004] However, when the bottle blowing machine works, the mold frame bracket 111 on it, the left mold frame 101 installed on the mold frame bracket 111, the right mold frame 102, the bottom mold bracket, and the mold opening and closing device are all around the blow molding machine. The rotating shaft rotates at a high speed, and in order to adapt to the rotating speed of the bottle blowing machine, the lifting device also needs to drive the bottom mold support and the bottom mold thereon to rise and fall quickly. Therefore, the bottle blowing machine of the prior art often has the following problems: 1. During the lowering process of the bottom mold support, the bottom mold support is under the downward thrust of the top spring 112, the moment when the lifting roller 109 at its lower end collides with the high surface of the curved surface of the lifting cam 110, and the lifting roller 109 moves from the lifting In the moment when the corner of the cam 110 transitions to the lower surface, the lifting roller 109 will collide with the curved surface of the lifting cam 110 with greater intensity, and its impact intensity will increase with the acceleration of its lifting speed. It produces loud noise and noise pollution; on the other hand, it is easy to cause the hard and brittle rollers to crack due to impact

2. It is necessary to separately set up a larger lifting cam 110 and a lifting roller 109 to drive the bottom mold bracket to drive the bottom mold to lift, which will inevitably increase the volume of the bottle blowing machine and take up more space

3. Due to the high-speed operation of the bottle blowing machine, the requirements for the dimensional accuracy of the lifting cam 110 and the assembly accuracy requirements between the lifting roller 109 of the bottom mold bracket and the lifting cam 110 are very high, otherwise it will affect the blowing machine. Normal operation, therefore, it will bring greater difficulty to the production, process, and installation of the lifting cam, which will increase the production cost

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