Foamed plastic mold

Abstract

The invention discloses a foamed plastic mold which comprises an upper mold base plate, an upper mold frame, a mold core and a lower mold base plate which are sequentially overlapped with one another from top to bottom, wherein a mold cavity is enclosed by the upper mold frame and the mold core, a lower steam water chamber communicated with the outside world is enclosed by the lower mold base plate and the mold core, the mold core is internally provided with a steam flow channel, the steam flow channel comprises at least one steam inlet and a plurality of steam outlets, and the steam outlets are communicated with the mold cavity. The steam flow channel is arranged in the mold core, cooling water in the lower steam water chamber can not penetrate into the steam flow channel, and a water-steam separating device and a seal ring do not need to be additionally arranged to prevent the cooling water in the lower steam water chamber from penetrating into the steam flow channel. Therefore, the foamed plastic mold provided by the invention has the advantages of being low in production cost, easy to assemble, convenient to maintain, and high in efficiency.

Description

technical field [0001] The invention relates to a foam plastic mold. Background technique [0002] Foam plastic product packaging boxes have the characteristics of light weight, good quality, high strength, high energy absorption (buffering, shock absorption), good shock resistance, etc., and are widely used in various precision instruments, meters, electronics, electrical appliances, medical treatment, aquatic products and Packaging of vegetables and fruits. The production of packaging boxes for foam plastic products is to fill the closed mold cavity with mature expandable polystyrene beads, and heat the polystyrene beads through the mold cavity in a short period of time. At this time, the foaming agent remaining in the polystyrene volatilizes, and the polystyrene beads soften and expand when heated. Due to the limitation of the mold cavity, the expanded beads can fill all the voids and be completely bonded as a whole. After cooling and setting, demould, it is a foam pla...

AI Technical Summary

Problems solved by technology

[0003] The existing foam molds have the disadvantages of high production cost and inconvenient maintenance. The reasons for the above disadvantages are: the soda chamber used for mold heating and cooling and the steam channel used for product foaming share the same inlet and outlet, and the product foaming The steam outlet is connected to the soda chamber, so the foaming speed and quality of the product are affected by the infiltration of cooling water when the product is foamed, resulting in a long production cycle and poor product quality.

Images