US 11,806,905 B2
Molds, mold assemblies and stack components
Maxfield Paul Bradshaw, Etobicoke (CA)
Assigned to HUSKY INJECTION MOLDING SYSTEMS LTD, Bolton (CA)
Appl. No. 17/299,497
Filed by HUSKY INJECTION MOLDING SYSTEMS LTD., Bolton (CA)
PCT Filed Nov. 21, 2019, PCT No. PCT/CA2019/051665
§ 371(c)(1), (2) Date Jun. 3, 2021,
PCT Pub. No. WO2020/118413, PCT Pub. Date Jun. 18, 2020.
Claims priority of provisional application 62/841,288, filed on May 1, 2019.
Claims priority of provisional application 62/778,028, filed on Dec. 11, 2018.
Prior Publication US 2022/0080637 A1, Mar. 17, 2022
Int. Cl. B29C 45/40 (2006.01); B29C 45/32 (2006.01); B29B 11/08 (2006.01); B29C 45/26 (2006.01)
CPC B29C 45/4005 (2013.01) [B29B 11/08 (2013.01); B29C 45/322 (2013.01); B29C 2045/2683 (2013.01); B29C 2045/324 (2013.01); B29C 2045/4078 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An injection mold comprising:
a core plate assembly, a cavity plate assembly and a stripper plate assembly arranged between the core and cavity plate assemblies;
a plurality of mold stacks, each of which includes a core insert, a cavity insert and a split mold insert pair arranged therebetween;
the core plate assembly including a core plate having a plurality of the core inserts mounted thereon;
the stripper plate assembly including a stripper plate with a bearing surface upon which a plurality of slide pairs are slidably supported, each slide pair being configured to retain a subset of the split mold inserts thereon;
the cavity plate assembly including a cavity plate having a plurality of the cavity inserts mounted thereon;
wherein the mold comprises a molding configuration in which the mold stacks are closed to define molding cavities and the stack height is configured such that a clamping load applied, in use, to urge the core plate toward the cavity plate is directed substantially entirely through the mold stacks;
wherein the distance between the split mold inserts and the core plate, when the mold is in the molding configuration, is greater than the thickness of the stripper plate assembly received therebetween, thereby to prevent the clamping load from being directed through the stripper plate assembly.