Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Plural sequential shaping or molding steps on same workpiece
Patent
1987-12-09
1989-07-18
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Plural sequential shaping or molding steps on same workpiece
2643281, 425150, 4254501, 4254519, 425589, 425595, B29C 4564
Patent
active
048491519
ABSTRACT:
A method of molding a plastic is initiated by injecting molten resin into a mold at a high pressure. The energy of the high pressure is partially stored in the form of elongation of tie bars of a molding machine. After the gate seals completely, the restoring force of the tie bars due to elastic deformation acts on the molded article as the mold article cools down. Each tie bar comprises a first member having a small modulus of elasticity and a second member. When the elongation of each tie bar is small, only the first member of small modulus of elasticity works. After the elongation reaches a certain amount of .DELTA.l.sub.1, the two members are connected parallel. As a result, the apparent modulus of elasticity of each tie bar increases rapidly. This makes it possible to mold a plastic with high dimensional accuracy.
REFERENCES:
patent: 4519763 (1985-05-01), Matsuda et al.
Ito Akio
Nakatani Yoshio
Sunohara Masaaki
Tamura Toru
Heitbrink Jill L.
Matsushita Electric - Industrial Co., Ltd.
Silbaugh Jan H.
LandOfFree
Method of molding plastic and injection compression molding appa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of molding plastic and injection compression molding appa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of molding plastic and injection compression molding appa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-170146