Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Opposed registering coacting female molds
Patent
1995-06-06
1996-07-23
Nguyen, Khanh P.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Opposed registering coacting female molds
425117, 425123, 425572, 425588, 425805, 264261, B29C 4514, B29C 4527
Patent
active
055384102
ABSTRACT:
A device for molding a buffer cap at the same time of fixing the cap to the bristle base implanting head of a toothbrush body preform. In the buffer cap molding and fixing device, a stationary molding plate is coupled to a mounting plate by a stop rod such that it is limited in its moving distance. The stationary molding plate has a plurality of sprues aligning with a plurality of gate holes. The bottom surface of the stationary molding plate has a plurality of top cavities, communicating with the sprues through their respective gates and each having a wider section provided with a pair of holding projections for holding a toothbrush body preform. The gates are formed at necks of the top cavities respectively. A back up plate is interposed between the stationary mounting plate and the stationary molding plate. A core plate comes into contact with the stationary molding plate at a parting plane. The top surface of the core plate has a plurality of bottom cavities corresponding to the top cavities. The wider section of the bottom cavity has a recess showing a surface roughness of 0.1-0.45.mu..
REFERENCES:
patent: 2923035 (1960-02-01), Schwartz
patent: 3553759 (1971-01-01), Kramer
patent: 3618154 (1971-11-01), Muhler et al.
patent: 3781402 (1973-12-01), Hangi et al.
patent: 5045267 (1991-09-01), Weihraugh
Choi Byong D.
Yoo Kyong Y.
Byong Duk Choi
Nguyen Khanh P.
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