Tag Archives: blow molding machine

The Producing Process of a Soda Bottle

Before the parison cools down, a hollow ramrod is injected into its center and pushed to the top of the mold, stretching out the warm plastic preform as it goes. Compressed air is then forced out in controlled low-pressure stages through the hollow ramrod. The plastic form is forced out to the sides of the mold. Because the stretching is performed evenly, the plastic remains uniformly thin and strong. The soda bottle assumes the shape of the mold and is dropped out of the blow molding machine as the two mold halves separate. A new parison is extruded and the entire blow molding process begins again. The actual manufacture of a soda bottle takes only a few seconds.

Since the introduction of bottled water into the market in the 90′s, it has become a household norm. Blow molding a two-liter soda bottle requires a preformed piece called a parison. The parison is mechanically loaded onto a stand and two sides of a bottle-shaped metal mold come together around it and is usually extruded from a plastic injection mouldplaced very close to the blow molding machine. The warm parison looks like an upside-down plastic test tube, with a preformed collar and threads for the cap at the bottom.

Technological Development of the Blow Molding Machine

Beverage companies for the blowing equipment, the two urgent needs of one of the plastic raw material prices continued to rise, and beverage companies all the time thinking about how to reduce packaging costs to achieve the maximization of profits, so the use of advanced blow molding equipment to produce lighter bottle; the second is due to the rapid changes in the market, beverage manufacturers must respond flexibly to drink more and more short life cycle, corresponding to the increasingly frequent product updates in the PET bottle production in the production process the need to minimize the time to replace the mold. Give these two pressing needs of the PET bottle blower not a small problem.
The closed-loop technology is the connection validation process parameters are integrated in the process control system of the stretch blow molding machine to form a closed, automatic control and automatic adjustment of the combination of production cycle.

Intelligent machine control technology designed to improve the quality assurance system of the blow molding machine. By use of AgrPETWallplus monitoring system can monitor a variety of data such as bottle thickness and other preforms. At work, the data deviate from the system rating will be immediately recognizable, this information will be timely transferred to the blow molding machine control system of the preform heating unit, the control system will be quickly reflected and individually controlled heating lamp furnace ratings. Therefore, even if the bottle data, the initial set of process parameters remain unchanged, to produce the quality of the bottle is still stable and reliable.

blow molding
blow molding

What is Injection Blow Molding Process

Injection blow molding process is a combination of injection moulding and blow moulding. It is use to manufacture high quality bottles and jars.

An injection blow molding machine usually has three mould stations, tube-like parisons, or preforms, are injection moulded at the first station, while still hot, these are transferred on mandrels to the blowing station where they are inflated in a set of blow moulds. The blown containers are then transferred to the ejection station.

Because the parisons are injection moulded, injection blown containers have a high quality neck finish and a better surface finish than extrusion blown containers. Tooling costs are high because a preform mould and blow mould are required. The process is usually used for smaller containers and finds its main applications in the pharmaceutical and cosmetics field.

preform mould
preform mould