Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1975-08-25
1977-06-07
Kucia, Richard R.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264328, 264329, B29F 104
Patent
active
040284581
ABSTRACT:
In a method for making hot melt adhesive sticks and other shapes for subsequent use in hot melted adhesive applicators, a charge of a hot melt adhesive is injected into one end of a cooling chamber, the opposite end of the chamber being sealed by a solid plug from a previous adhesive charge. This first charge is maintained under pressure until its outside wall forms and sets so that any shrinkage occurs at the end of the charge. That shortage is made up when the next charge of hot melt adhesive is injected into the chamber. If the first charge has not set sufficiently to be self-supporting, the pressure of the next charge balloons the soft side walls of the insufficiently set charge outward against the chamber walls so that that charge does not move along the chamber, but remains for another complete cycle of operation until it is ready. Thus each adhesive stick ejecting from the opposite end of the chamber is uniform, accurately dimensional and solid. Then the protruding end of the solid stick is severed leaving a solid plug which seals the exit end of the chamber when the next charge of liquid adhesive is injected into the chamber.
REFERENCES:
patent: 2469342 (1949-05-01), Richardson
patent: 2488344 (1949-11-01), Stonestreet
patent: 3322708 (1967-05-01), Wilson
patent: 3392224 (1968-07-01), Archer
patent: 3484513 (1969-12-01), Paoli
patent: 3665068 (1972-05-01), Duling
Cesari Robert A.
Kehoe Andrew F.
Kucia Richard R.
McKenna John F.
Transworld Adhesive & Chemical Corporation
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