About the Blow Molding Machine (very detailed introduction)

blow molding machine introduction

Today, Yankan Plastic Machinery will share our knowledge about blow molding machine.

This guide is very detailed.

1.Overview of blow molding machine

After the liquid plastic is sprayed out, the wind force from the machine is used to blow the plastic body into the mold cavity of a certain shape to make products. This machine is called the blow molding machine.The plastic is melted and extruded quantitatively in a screw extruder, which is then moulded through the mouth film and then cooled by a wind loop, which is then pulled at a certain speed by a tractor which is wound into a coil.

Extrusion blow molding machine is a combination of extruder and blow molding machine, which consists of extruder and mold head, expansion device, mold closing mechanism, mold thickness control system and transmission mechanism.Mold die head is one of the important parts to determine the quality of blow molding products.

2.Working principle of blow molding machine

After the plastics and hopper enter the extruder barrel, they are forced by the screw thread to push in the direction of the head.Due to the resistance of filter net, split plate and die at the head of the machine, and the capacity between screw threads is gradually reduced.On the other hand, when plastics are subjected to compressive, shear and agitation forces in motion, the friction between the cylinder and the screw and the friction between the plastic molecules will produce a lot of heat.

blow molding machine production display

As the temperature of the plastic in the cylinder keeps rising, its physical state gradually changes from glass state to high elastic state, and finally becomes viscous flow state and further fully plasticizes.As the screw is rotating continuously, the plasticized plastic isobaric and isobaric are extruded from the die of the machine head.After cooling and shaping, the extrusion process is completed.

3.Application of blow molding machine

Hollow blow molding (also known as blow molding) is a method to form hollow products by means of air pressure by blowing hot melt billet closed in the mold. It is the third most commonly used plastic processing method and also a rapidly developing plastic molding method.Compared with injection molding, the equipment cost is lower, the adaptability is stronger, the moulding performance is good (such as low stress), and the moulding of products with complex undulation curve (shape) is good.

blow molding machine application show

4.3 ways to choose the right blow molding machine


To determine the product size (appearance size, capacity size, approximate shape) and weight.Supply the quantity you need to the supplier, and let the supplier choose the initial model for you.The equipment recommended by some unprofessional suppliers may not be completely appropriate, which can be understood by the customer factory.


We choose the equipment not to say that the cheaper the better, but the more cost-effective.Same equipment configuration, different manufacturer’s stability is not necessarily the same.The big factory is always better, because supplier channel is different, supplier is good of course cost is also high.Many people do not understand, will always ask you the same configuration, why your price is higher than his.

The price is high, but you save trouble.Because there are fewer problems with the machine, you spend less energy on it, and the power savings are good, even if you spend more money on the machine, you will save money in the long run.


The condition of equipment is more similar than after sales.After – sales not only maintenance equipment, but also help to solve technical problems.Sometimes it is necessary to make suggestions and suggestions for production and marketing.

5.Maintenance of blow molding machine(You can click on the title to get what you want)

How Should the Extruder of Blow Molding Machine be Maintained?

How to Maintain the Temperature Controller?

How to Maintain the Contactor of Blow Molding Machine?

How to Maintain the Heater?

Inverter Maintenance of the Blow Molding Machine(very effective)

Above is the knowledge that Yankang shares with you about blow molding machine.For more information about blow molding machine, please go to the website of Yankang Plastic Machinery.

Qingdao Yankang Plastic Machinery Co.,Ltd is the biggest leading manufacturer of blow molding machines in China, which is specialized in manufacturing, designing in super size blow molding machines and blow molds with capacity from 200L up to 20,000L for 1-6 layers productions.For more information about blow molding machine, please go to the website of Yankang Plastic Machinery.

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