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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11433580 B1

PDFFull Text
Date of Patent:
Sep. 06, 2022

Filed:

Apr. 16, 2018

Method to chase weld lines by timing and positioning of gates

Applicant:

Ford Motor Company, Dearborn, MI (US);

Inventors:

Junko Pauken, Canton, MI (US);

Haoliang Michael Sun, Rochester Hills, MI (US);

Assignee:

Ford Motor Company, Dearborn, MI (US);

Attorney:

Burris Law, PLLC

Primary Examiner:

Alison L Hindenlang

Assistant Examiner:

Debjani Roy

Int. Cl.
CPC ...
B29C 45/76 (2006.01); B29C 45/00 (2006.01); G06F 17/00 (2019.01); B29C 45/77 (2006.01); B29C 45/27 (2006.01); B29K 105/00 (2006.01); G05B 19/18 (2006.01); B29C 45/28 (2006.01);
U.S. Cl.
CPC ...
B29C 45/0025 (2013.01); B29C 45/2708 (2013.01); B29C 45/76 (2013.01); B29C 45/7613 (2013.01); B29C 45/77 (2013.01); G06F 17/00 (2013.01); B29C 45/2806 (2013.01); B29C 2045/0032 (2013.01); B29C 2045/2709 (2013.01); B29C 2945/76003 (2013.01); B29C 2945/7627 (2013.01); B29C 2945/76066 (2013.01); B29C 2945/76083 (2013.01); B29C 2945/76277 (2013.01); B29C 2945/76287 (2013.01); B29C 2945/76381 (2013.01); B29C 2945/76551 (2013.01); B29C 2945/76749 (2013.01); B29C 2945/76755 (2013.01); B29K 2105/0032 (2013.01); B29K 2995/0008 (2013.01); G05B 19/18 (2013.01);
Abstract

An apparatus and method for eliminating mold lines when molding a part having ferromagnetic pigments is provided. A mold assembly having a mold with a cavity and valve gates is formed. Pucks are fitted at the gates to collect residual cold plastic. The calculation of a specific sequence and timing of the opening of the valve gates is determined based on a calculation of the total number of valve gates needed to fill a part while maintaining acceptable injection molding pressure. Once calculated, the gates are positioned around the mold cavity to balance flow length ratio. A primary gate is chosen for initial injection. The time for the material to flow from the first to the second gate is established. The second gate is opened after the flow front reaches the second gate. This pattern continues until all valve gates are opened.

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