Mold for producing hollow foamed floors

Abstract

The invention relates to a mold for producing hollow foamed floors, and belongs to the technical field of foaming floor molds. The mold is a co-extrusion mold and comprises a mold shell, an inner corerod and an outer core rod, and a main runner and an auxiliary runner are arranged in the mold shell; the inner core rod and the outer core rod are arranged in the main runner, and the outer core rodis arranged on the periphery of the inner core rod in a sleeving mode; the inner core rod comprises an inner core base body, a plurality of inner core mounting feet and a plurality of inner core rod bodies; the outer core rod comprises an outer core shell and a plurality of outer core mounting feet; a plurality of core inner mold cavities are formed in the outer core shell, and the adjacent core inner mold cavities are separated through isolation supporting plates; and the number of the core inner mold cavities corresponds to that of inner core rod bodies, and the inner core rod bodies are sleeved with the core inner mold cavities in a suspended mode. According to the mold, by means of the combined structure of the inner core rod and the outer core rod, a buffering effect can be achieved when foaming materials are transited to a foaming cavity, limited and controlled foaming can be achieved, and therefore the quality stability of products is improved.

Description

technical field [0001] The invention relates to a mold, in particular to a mold for producing hollow foamed floors, belonging to the technical field of foamed floor moulds. Background technique [0002] At present, there is only one type of mold for extrusion of PVC co-extrusion hollow foam floor in the industry. For example, the Chinese invention patent with application number 201510767865.5 discloses a mold for making wood-plastic floor, including a mold with raw material inlet. The mold body, the casing with the raw material outlet, the choke rod and the flow limiting cover; one end of the choke rod is connected to the raw material inlet of the mold body through a fixed body, and the other end protrudes from the raw material outlet of the casing ; One end of the restrictor is seamlessly connected to the raw material inlet, and the other end is seamlessly connected to the raw material outlet; the raw material inlet is larger than the raw material outlet, so that a tapered ...

AI Technical Summary

Problems solved by technology

For example: after the board is extruded from the die mouth, it will continue to foam and expand, resulting in serious deformation of the inner hole; and because it is a hollow board, there are multiple support structures inside the board, and the support structures support the board surface, and the board surface of the corresponding hollow part has no Supported, in this case, after co-extrusion, the co-extruded material has pressure on the original substrate, because different parts of the board are supported differently, the pressure will be unevenly distributed, and the co-extruded layer will appear thick and thin Inconsistent cases, even cases where the substrate collapses

In the final production, only materials with low foaming agent can be used for production to reduce or avoid the above-mentioned adverse effects; but in this way, the density of the product will increase, and the meter weight will become larger, which will not be able to take advantage of the advantages of the hollow board