	US 12,109,774 B2
	Heel cap manufacturing method and manufacturing equipment
Heng-Tai Chang, Taichung (TW); Yu-Che Shen, Taichung (TW); and Thi Bich Van Chung, Taichung (TW)
Assigned to DAH SHENG CHEMICAL INDUSTRY CO., LTD., Taichung (TW)
Filed by DAH SHENG CHEMICAL INDUSTRY CO., LTD., Taichung (TW)
Filed on Oct. 1, 2021, as Appl. No. 17/491,620.
Claims priority of application No. 110132334 (TW), filed on Aug. 31, 2021.
Prior Publication US 2023/0068828 A1, Mar. 2, 2023
Int. Cl. B29D 35/12 (2010.01); A43B 21/00 (2006.01); B29C 33/02 (2006.01); B29C 43/52 (2006.01); B29D 35/14 (2010.01); B29L 31/50 (2006.01)

CPC B29D 35/124 (2013.01) [A43B 21/00 (2013.01); B29C 33/02 (2013.01); B29C 43/52 (2013.01); B29D 35/144 (2013.01); B29L 2031/502 (2013.01)]

7 Claims

1. A heel cap manufacturing method comprising the steps of:

a) preparing a multilayer composite material;

b) performing first press molding at a first temperature to the multilayer composite material by a thermal pressing device to obtain a thermal pressed semi-product;

c) taking out the thermal pressed semi-product from the thermal pressing device and then fixing the thermal pressed semi-product to a heel cap mold;

d) performing second press molding at a second temperature which is lower than the first temperature to the thermal pressed semi-product together with the heel cap mold in a cooling device to obtain a cooled semi-product; and

e) demolding the cooled semi-product from the heel cap mold, and after it is rewarmed, obtaining a finished heel cap.