This post introduces the mechanism and characteristics of die head of storage cylinder blow molding machine.
Blow molding machine die head, also called the head.
The die head includes a perforated plate, a strainer connection tube, and a core assembly. The die heads commonly used in blow molding machines are straight-through die head, corner die head, and die head with storage cylinders.
Among them, the straight-through die head direction is consistent with the axial direction of the screw. When the melt flows through this die, the flow direction is unchanged. This type of die can be used for blow molding of heat-sensitive plastics. Hard PVC bottles are often obtained by using this die for blow molding.
The corner die head is composed of a tubular die head and a connecting tube, which are perpendicular to each other.
There is a storage cylinder in the die with a storage cylinder. The melt is stored in the storage tank first, and when the storage amount reaches a certain value, it is extruded and blow-molded together. Since a sufficient volume of the melt can be stored in the storage cylinder, the storage cylinder die can be used to produce large blow molded products.
The die head is a part that plays an important role in the production process of the storage cylinder blow molding machine, especially for multilayer plastic products.
So today I will introduce to you the structure and characteristics of the die head of storage cylinder blow molding machine.
Structure of die head of storage cylinder blow molding machine
The structure of the hollow blow molding machine die, including the vertical body from the extrusion port to the top, is the hollow blow molding machine die.
The die head of the storage cylinder type hollow blow molding machine is mainly composed of 4 parts: die, storage cylinder, extrusion cylinder, thick and thin cylinder.
Large-scale multi-layer co-extrusion hollow plastic molding machine adopts a storage cylinder die. The structure of the die head is to put the main die head above each layer of die head, and at the same time, there is a need for concentric ring pistons to integrate the die head and the storage cavity. This allows it to achieve high-speed extrusion of parisons at low pressure.
The die head of the storage cylinder type hollow blow molding machine is divided into an intermediate feeding type and a lateral feeding type.
Among them, the lateral feed type is a widely used structure of the storage types hollow blow molding machine.
The role of the die head of the blow molding machine in the production process is to melt the plastic raw materials to form a plastic mold embryo in a molten state for molding.
Features of die head of storage cylinder blow molding machine
- The use of a storage cylinder hollow blow molding machine die can ensure that each layer of the multilayer product can reach the ideal state, thereby ensuring that the products produced have a uniform wall thickness distribution.
- At the same time, it will not be affected by the distribution of materials, and different plastic raw materials can be processed and adjusted according to different extrusion amounts;
- The multi-layer structure of the die head meets the needs of special products. It can meet the technological requirements of different flow rates and different materials.
- The rheological design of the die head is the key in the production process. Not only can it have a good self-cleaning function at low extrusion volume, but also have small shear heat at high extrusion volume.
As a large blow molding machine manufacturer, Yankang uses a multi-layer die design for the large storage cylinder type extrusion blow molding machine equipment.
Not only can it ensure that the blow-molded products have a uniform wall thickness distribution, but also in the process of control and adjustment of the production process, the energy consumption is low, the energy-saving effect is good and certain production costs are saved.
The above are all the contents of the structure and characteristics of the die head of storage cylinder blow molding machine.
Hollow plastic products are widely used, and multi-layer co-extruded plastic hollow products have become more and more important in the field of blow-molded products in recent years. As an important part of the hollow blow molding machine, the die head determines the quality and performance of the blow molding machine itself.
Therefore, when we choose a hollow blow molding machine, we should not ignore the consideration of the die head of the blow molding machine.
For more information about blow molding machines, visit the Yankang blow molding machine blog.