Title:
STRINGINESS PREVENTING NOZZLE AND NOZZLE ORIFICE PROCESSING METHOD
Document Type and Number:
Japanese Patent JP3277316
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nozzle in a product taking-out process of a molding cycle and having a nozzle orifice not leaving the resin material of a space part immediately after the nozzle orifice and a method for processing the nozzle orifice.
SOLUTION: A nozzle orifice is formed into a shape of which the cross section is gradually reduced from the leading end part coming into contact with a mold at a time of injection toward the inside and a nozzle 20 has a non-circular cross-sectional shape over the total length of the nozzle orifice 21. Since the nozzle orifice 21 has a taper shape expanded in the extracting direction of the molded product and is processed so as to have a non-circular cross-sectional shape over the total length thereof, the surface area of the leading end part of a sprue is large and solidification is fast and, therefore, the molded product can be easily extracted and a resin material becoming a base of cold slag is not left in the space part immediately after the nozzle orifice 21 in the nozzle 20.
Inventors:
Nobuhide Tomura
Masao Hirosawa
Masao Hirosawa
Application Number:
JP3700597A
Publication Date:
April 22, 2002
Filing Date:
February 05, 1997
Export Citation:
Assignee:
Toshiba Machine Co., Ltd.
International Classes:
B29C45/20; (IPC1-7): B29C45/20
Domestic Patent References:
| JP7100860A | ||||
| JP584782A | ||||
| JP1122913U | ||||
| JP2111509U | ||||
| JP494616U |