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Parison wall thickness uniformity control

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  • 25/05/2018

Strictly speaking, parison wall thickness uniformity control is the key to blow molding technologyThe following four types of control are performed in the blow molding operation.1 mechanical control: some control of the machine itself, such as temperature control and extrusion control.2 process control measures and controls certain characteristics of the flow of plastics or plastics in machinery,Such as melt temperature control, melt pressure control, parison wall thickness program control and pa…

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Blown film intake method

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  • 24/05/2018

1.Air intake Hollow-blow air intake is available in many forms, usually using needle blowing, top blowing, and bottom blowingThree kinds of law. Regardless of the form used, the pressure of the compressed air should be sufficient to blow the parisonThe principle of clear outlines and clear letters is the principle. 2. Screw speed For the selection of the screw speed, a principle should be followed in that it can be extruded smoothlyUniform parisons, as long as they do not overload the ex…

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Blow mold basic technical points

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  • 23/05/2018

Blow mold basic technical points (1) Parting surface: The parting surface is one of the basic elements of a blow molding mold. Parting surfaceThe position should be such that the container can be smoothly released from the mold. Most blow molds are designed toThe parting surface is the two mold halves that match the boundary, but for irregularly shaped bottles andThe determination of the position of the parting surface is particularly important. The location of the parting surface is determ…

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The required structure of blown film

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  • 22/05/2018

The required structure of blown film Blow mold: “product forming mold” also known as “blow mold”, referred to as “blow mold”, its typical structureIllustration. The mold is mainly composed of two half molds. Due to the mold collar and the clips are easy to wear, usually madeThe mosaic structure facilitates repair or replacement. Figure: Typical blow mold structure1 everything blank sleeve; 2 a die neck collar; 3 a cavity; 4 cavity; 5 a blank blank; 6 a cavity exhaust outlet; 7 a guide …

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Several kinds of machine head operation mode of extrusion blow molding

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  • 21/05/2018

Several kinds of machine head operation mode of extrusion blow molding Direct extrusion of the preform head, from the structural point of view, direct extrusion of the preform head can be divided into two categories:Center feed type and side feed type. Center-feed preform heads can be divided into bracket heads and boostersStretch strength stent type two kinds. Lateral feed parison heads are: ring-branched parison heads,There are three kinds of heart-shaped branch tube heads and spiral branch t…

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Single screw extruder

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  • 10/10/2017

Single screw extruder Single screw extruderFirst, the structural characteristics of single screw extruder Single screw extruder is currently the most widely used domestic extruder. Its structureFeatures are: extruder plastic system is composed of a screw and barrel with the composition of the materialBucket, electric heating and cooling systems and porous plates and filters and other components with the work to complete the originalMaterial of the extrusion plastic work.This single…

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