Screw and injection apparatus

Details Screw and injection apparatus Screw and injection apparatus

2011-08-09

2011-08-09

Heitbrink, Tim (Department: 1744)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

Including feeder to supply stock to charger

C366S100000

Reexamination Certificate

active

07993128

ABSTRACT:
An object is to reduce the axial dimension of an injection apparatus, melt a molding material uniformly, and improve the quality of molded products. A screw (20) comprises a plasticizing portion which comprises a body portion (45a) and a flight (53) projectingly formed on an outer circumferential surface of the body portion (45a). A groove-depth setting region is defined over a predetermined section of the plasticizing portion, and in the groove-depth setting region, the ratio γ1of a groove depth τ1to a diameter δ1of pellets of a molding material falls within the range of 1≦γ1≦1.5 where the groove depth τ1is a depth of a groove (67) formed along the flight (53). In the groove (67), pellets are arranged laterally and caused to advance while rolling along the groove (67). Since the pellets do not aggregate, no solid bed is formed.

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Search Report issued Sep. 9, 2010 for corresponding TW patent application.

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