Plastic cushion featured by coexistence of pipe network and filaments, its production technology and rotary type molding handpiece

Abstract

A plastic cushion featured by a coexistence of pipe networks and filaments provided by the invention comprises plastic filaments with a disordered arrangement and connections with each other, and a pipe network in the cushion. The production technology comprises the following steps that: raw materials are sent into an extruder to heat for plasticizing to form a melt; the melt is extruded from a rotary type molding handpiece, the plastic filaments extruded from a fixed mold discharging opening move downward to form disordered filaments through a shaping roller and form connections at the points of contact with each other; the plastic filaments extruded from the second grooves around a rotating mold arranged at the inner side of the fixed mold form a pipe network, and are provided with cavities inside the pipe network; the extruded formed plastic cushion with the pipe network in the center and filaments on the periphery is cooled for shaping; and the shaped plastic cushion is pulled out from a cooling device for cutting according to specifications. The rotary type molding handpiece is characterized by that: the fixing mole is provided with the rotating mold and the second grooves, the rotating mold is connected with a rotating mechanism. The plastic cushion has the advantages of moderate density, adequate connections of filaments, without spraying glue for enhancement, high fastness and no pollution, and the cushion can be provided with temperature regulation members inside.

Description

[0001] This application is a divisional application of patent application No. 200810230180.7. The original application date is December 26, 2008. The invention is named pipe network and random thread coexistence plastic cushion and production process and rotary molding head. technical field [0002] The invention relates to a plastic cushion with coexistence of pipe network and random threads, its production process and a rotary molding machine head used in the production process. Background technique [0003] The traditional plastic elastic soft mattress is composed of random plastic filaments arranged in disorder. The production process is to feed the raw materials into the extruder for heating and plasticizing to form a melt, and then extrude downward through a fixed porous spinneret. The materials are piled up into a disorderly cohesive silk mat, and then the finished product is made through complex processes such as shaping, cooling, cutting, spraying glue to strengthen,...

AI Technical Summary

Problems solved by technology

Due to the characteristics of the process, there is too much overlap when the disordered plastic filaments are bonded, and the space is not fully and effectively used, resulting in a heavy weight per unit volume; and because the plastic filaments are bonded after leaving the template, it affects the bonding. Fastness

Although the performance has been improved by spraying glue, the overall fastness is still not ideal, and it is difficult to ensure the uniformity of glue spraying; at the same time, it must be dried quickly after spraying glue, which produces a lot of harmful volatile substances. pollution of the environment

The overall strength of the product is poor, there is no space inside the pad for heating or cooling components, and the use is limited

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