公开(公告)号：US3574897A

公开(公告)日：1971-04-13

申请号：US3574897D

申请日：1969-03-21

Applicant: MATTEL INC

Inventor： CITRON MANNING ,  BAYNES WILLIAM R ,  MERINO DENNIS H

IPC: B29C45/20 ,  B29C45/53 ,  B29F1/03 ,  B29F1/06

CPC classification number: B29C45/53 ,  B29C45/20 ,  Y10S425/057 ,  Y10S425/226

Abstract: A simple injection mold machine comprising a heated cylinder that is spring biased upward, away from the mold, a valve at the bottom of the cylinder which is opened by pushing it up, and a piston for moving down in the cylinder. Downward force on the piston moves the cylinder down until the valve abuts the mold and is opened, the piston also supplying force to expel the material out of the cylinder and into the mold. The molds include wells that trap the first-injected material, which may represent the remainder from a previous charge of another color so it does not enter the cavity where useful parts are formed. The molds also include riser passageways that allow the escape of material when the cavity is filled, to indicate this fact.

公开(公告)号：US3531890A

公开(公告)日：1970-10-06

申请号：US3531890D

申请日：1968-02-08

Applicant: MATTEL INC

Inventor： CITRON MANNING ,  KENNEDY MELVIN R

IPC: A63H3/00 ,  A63H13/10 ,  A63H33/26

CPC classification number: A63H3/006 ,  A63H13/10