Plastic hook piece rolling mold

Abstract

The invention discloses a plastic hook piece rolling mold which comprises a hollow shaft, a plurality of working circular thin pieces, adjusting circular thin pieces and compression nuts, wherein the hollow shaft is composed of an upper shaft head, a lower shaft head, an outer conical cylinder between the upper shaft head and the lower shaft head and an inner conical expansion sleeve sheathed on the outer conical cylinder; the plurality of working circular thin pieces and the adjusting circular thin pieces are sequentially sheathed on the hollow shaft; the compression nuts are arranged at thetwo ends of the hollow shaft and compress the working circular thin pieces and the adjusting circular thin pieces; the compression nuts correspond to the diameters of the outer conical cylinder and the inner conical expansion sleeve; an annular shoulder is arranged at one end of the inner conical expansion sleeve; an axial opening is arranged on the peripheral wall of the inner conical expansion sleeve; and a cooling liner is arranged in the hollow shaft. The inner conical expansion sleeve with the axial opening expands under the extrusion of the compression nuts, thereby eliminating the radial clearances between the inner holes of the working circular thin pieces and the adjusting circular thin pieces and the central shaft, improving the coaxiality and roundness of the rolling mold and enabling the thickness of a plastic hook piece to be more uniform. In addition, through cooling of the cooling liner, the mold stripping effect of the rolling mold is improved.

Description

technical field

[0001] The present invention relates to a plastic mould, in particular to a plastic hook piece rolling die, which includes a hollow shaft, a number of working circular slices and adjusting circular slices arranged on the hollow shaft; the working circular slices and adjusting circular slices They are sleeved on the hollow shaft in turn and compressed by compression nuts arranged at both ends of the hollow shaft. Background technique

[0002] At present, the plastic hook piece rolling mold that adopts cylindrical structure has been reported, such as CN201175979Y discloses a special composite mold for the production of extrusion-type hook surface of hook and loop fasteners, including a central shaft, on which several It is a round sheet with the same outer diameter, and each round sheet is tightly pressed and fixed on the central axis to form an assembled and combined cylindrical structure. The outer edge of each round sheet is densely covered with multiple gap...

Images