| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixed delivery hot-melt adhesive distributing device which can prevent or reduce undesirable phenomenon such as bursting and cobwebbing of a hot-melt adhesive material when hot-melt adhesive distributing operation or its cycle starts and ends. SOLUTION: The fixed delivery hot-melt adhesive distributing device 10 is provided with a plurality of valve assemblies 12 and a multi-exit fixed delivery gear pump 50 for supplying the hot-melt adhesive material thereto. Each valve assembly 12 is hydrodinamically connected with an intake side of the multi-exit fixed delivery gear pump 50 via feedback conduits 76, 78, 80, 82 and a common feedback line 84. A single output feedback fixed delivery gear pump 86 is disposed in the common feedback line 84 and a recirculating bypass loop 88 is connected therewith. A one-way check valve 90 energized by a spring is arranged in the recirculating bypass loop 88.
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