Blow molding machine production characteristics and working principle

Blow molding machine production characteristics and working principle

Posted 1 year ago in Other.

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The blowing of thermoplastic materials began in the early forties. Polystyrene was the first material used following the development of the first petblowingmachine . The low-density polyethene (LDPE) in the first commercial application of the large volume bottles such as the deodorant canister. However, the introduction of high-density polyethene (HDPE) and the commercial availability of blowing machines led to significant industrial growth in the 60s. Nowadays, PET is the third most used material method in plastics processing.

Rotary Blow Molding Machine with high speed, stability, replacement parts quickly and easily, and other advantages, welcomed by the manufacturers of the customers, the market share soared. Below, we list some common failures and handling methods of rotary blow molding machines.

high-pressure solenoid valve can not be effectively closed and produce high-pressure gas leak. The reason is that high-pressure solenoid valve stuck inside the foreign body, most of the plastic fragments. This need to open the seal in the high-pressure solenoid valve to clean, restore the installation can be used normally.

bottle out bottle. The reason is that the finger out of the bottle automatically open or pinch the bottle, you need to replace the nylon block inside the fingers.

double blanks when the billet. The reason is to blanch the track and take blank blanks clearance is too large, adjust the gap to the right.

stretch seal upper and lower limit alarm. There are three reasons: low pressure gas pressure is not enough; two five-way solenoid valve insensitive; relay damage. Solution: 1, to ensure that the low-pressure gas is 0.6-0.8MP; 2, replace the solenoid valve and check and clean (replacement) low-pressure air filter; 3, replace the relay (temporarily available in the control box other idle relay instead).

accompanying the fixture when the mold is open from the bracket. The reason is that the bracket deviates from the center of the mold, causing the mold holder to collide with the fixture, so long as the position of the bracket is adjusted.

preform on the blank when not on the fixture. The reason is the clamp heart and the mouth center is not concentric. Solution: 1, if the dial is not aligned with the eight jaws, adjust the dial position; 2, if individual fixtures and dial gap is not aligned, then check the guide shaft bending, if any, you need to change guide axis.If interested, kindly welcome to visit