Hollow forming blow molding machines can be divided into continuous extrusion blow molding and batch extrusion blow molding according to the different discharging methods.
(1) Working principle of continuous extrusion blow molding machine This method is characterized by continuously extruding the tube by the extruder. Its advantages are: simple molding equipment, low investment, easy to operate, it is the basic forming method commonly used by domestic small and medium-sized enterprises. The production process of continuous extrusion blow molding method has three kinds of reciprocating type, rotating material discharging type and rotating disc type.
1 Reciprocating continuous extrusion hollow blow molding machine, the parison is continuously extruded by the extruder. When the parison is long enough, the blow mold is displaced from the blow molder and the cooling man to the clamping mold blank under the head. Then move back to the blow station. The reciprocating motion of two molds separated by the right and left under the nose ensures the continuity of the production process.
2 Rotary-feed continuous extrusion blow molding machine, in the front of the extruder, a directional valve is used to control the flow of the melt, so that the melt rotates through the parison head on both sides of the extruder to extrude the parison. Realize continuous production.
3 Rotary disc type continuous extrusion hollow blow molding machine, the extruder continuously extrudes the parison, the parison is clamped by the die, and is transferred around the axis of the rotary disc to a station for inflating, cooling, opening the die and taking out the products, etc., to realize the process Continuous. Blow molds can also be set on a horizontal turntable.
(2) Working Principle of Batch Extrusion Blow Molding Blow Molding Machine This method is used by the extruder to continuously melt the melted plastic melt into a material storage cavity, and the material in the storage cavity is required At the quantity, the material in the storage chamber is quickly pressed.
(1) Working principle of continuous extrusion blow molding machine This method is characterized by continuously extruding the tube by the extruder. Its advantages are: simple molding equipment, low investment, easy to operate, it is the basic forming method commonly used by domestic small and medium-sized enterprises. The production process of continuous extrusion blow molding method has three kinds of reciprocating type, rotating material discharging type and rotating disc type.
1 Reciprocating continuous extrusion hollow blow molding machine, the parison is continuously extruded by the extruder. When the parison is long enough, the blow mold is displaced from the blow molder and the cooling man to the clamping mold blank under the head. Then move back to the blow station. The reciprocating motion of two molds separated by the right and left under the nose ensures the continuity of the production process.
2 Rotary-feed continuous extrusion blow molding machine, in the front of the extruder, a directional valve is used to control the flow of the melt, so that the melt rotates through the parison head on both sides of the extruder to extrude the parison. Realize continuous production.
3 Rotary disc type continuous extrusion hollow blow molding machine, the extruder continuously extrudes the parison, the parison is clamped by the die, and is transferred around the axis of the rotary disc to a station for inflating, cooling, opening the die and taking out the products, etc., to realize the process Continuous. Blow molds can also be set on a horizontal turntable.
(2) Working Principle of Batch Extrusion Blow Molding Blow Molding Machine This method is used by the extruder to continuously melt the melted plastic melt into a material storage cavity, and the material in the storage cavity is required At the quantity, the material in the storage chamber is quickly pressed.
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