Process introduction
Extrusion blow molding is a method of making hollow thermoplastic parts. Well-known blow molding objects include bottles, barrels, cans, boxes, and all containers for packaging food, beverages, cosmetics, medicines, and daily necessities. Large blow molded containers are often used for packaging of chemical products, lubricants and bulk materials.
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Process characteristics
Process cost: processing cost (medium), unit cost (low)
Typical products: chemical product container packaging, consumer product container packaging, pharmaceutical container packaging
Yield suitable: Only suitable for mass production
Quality: high quality, the wall thickness is exactly the same, the surface treatment is suitable for smooth, frosted, textured
Speed: fast, 1-2 minutes per cycle on average
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process flow
Process picture
Plastic → plasticizing and melting → extrusion parison → inflation → product cooling → demoulding → post-processing → product
detailed steps
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Step 1: Pour the polymer particles into the hard mold, and form a colloidal hollow columnar prototype by heating and mandrel continuous extrusion
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Step 2: When the hollow columnar prototype is extruded to a certain length, the molds on the left and right sides begin to close, and the top of the prototype will be cut by a blade to a suitable length for a single piece, and air will be injected into the prototype through the inflatable rod, so that the prototype is close to the inner wall of the mold to cool and solidify, forming the desired shape
Step 3: After the cooling is over, the molds on the left and right sides are opened and the parts are demolded
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Step 4: Trim the part with the repair tool
