COMPRESSION MOLD AND METHOD FOR FORMING CARBIDE TIP OF DRILL BIT BY WIDTHWISE PRESSING

WIPO Patent Application WO/2021/212448

A1

A compression mold for forming a carbide drill tip (4) is disclosed. The mold comprises a die (1), an upper punch (2) and a lower punch (3). The die comprises an inner wall (11) defining a die hole. The upper punch is inserted into the die hole from the upper side of the die. The lower punch is inserted into the die hole from the lower side of the die. A part of the die hole defines a filling cavity. The filling cavity is defined by at least the top surface of the lower punch and the inner wall. A powdered material is fed into the filling cavity. The upper and lower punches are configured to compress the powdered material filled in the filling cavity in a vertical direction corresponding to the width direction of the drill tip formed by the powdered material. A compression method for forming a carbide drill tip is also disclosed. It is easy to form a drill tip with a sharp head.

FANG XU (CN)
ANGHILERI MASSIMO (CN)
JI HAIFENG (CN)
YANG ZHENGLIN (CN)
BAI HONGKAI (CN)
CAI XIAO (CN)
SHI SHUNLI (CN)

PCT/CN2020/086589

October 28, 2021

April 24, 2020

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BOSCH GMBH ROBERT (DE)
FANG XU (CN)
ANGHILERI MASSIMO (CN)
JI HAIFENG (CN)
YANG ZHENGLIN (CN)
BAI HONGKAI (CN)
CAI XIAO (CN)
SHI SHUNLI (CN)

B22F3/03; B22F5/00; B30B11/02

WO2001005541A1

2001-01-25

US20020007701A1	2002-01-24
CN104707999A	2015-06-17
CN103071792A	2013-05-01
CN2923292Y	2007-07-18
CN102274892A	2011-12-14

NTD PATENT AND TRADEMARK AGENCY LTD. (CN)

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