Energy-saving high-efficiency foaming molding mold

Abstract

The present invention discloses a foaming shaping mold which has the advantages of energy saving and high efficiency. The foaming shaping mold comprises a cavity die (11) and a terrace die (13). The inner part of the cavity die (11) and terrace die (13) are respectively installed with steam chambers (25, 45) which are respectively composed by the enclosing of cores (21, 41), mold frames (23, 43), installation plates (22, 42) and backboards (24, 44). At least one part or total part of mold frames (23, 43) of cavity die (11) and terrace die (13), the installation plates (22, 42) and the backboards (24, 44) at the surface facing the steam chambers (25, 45) are installed with tortoise shell net (80). A heat insulation layer (60) is coated outside the tortoise shell net (80). The foaming shaping mold of the invention has the advantages of simple structure, convenient construction and low cost. The accessory heat insulation layer has the advantages of no easy break-off, long service lifetime, and stable and reliable capability. The foaming shaping mold of the invention also has the advantages of effectively reduced steam consumption rate, saved heat energy of steam, increased production efficiency of product, and suitability for generalization.

Description

technical field [0001] The invention relates to a foam molding mold for thermoplastic foamed plastic particles, in particular to an energy-saving and high-efficiency foam molding mold. Background technique [0002] Polystyrene foamed plastics are used to form foamable thermoplastic particles in thermoplastic foamed plastic molds. After pre-expanding to the required expansion ratio, the thermoplastic molding The expanded plastic particles are introduced into the forming mold, and then steam is introduced to heat, soften and expand for secondary foaming. After the pre-expanded thermoplastic particles are foamed and melted to fill the entire molding chamber, the entire mold is then cooled, and the temperature of the molded product is reduced to After the demoulding temperature is reached, the method of demoulding and taking out the desired foamed molded product is commonly known as thermoplastic foamed plastic foam molding. [0003] The foaming mold used in the above molding p...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the maximum service temperature of butyl rubber is about 100-120°C, and taking EPS expanded polystyrene as an example, the maximum temperature of the steam required for its molding is about 110°C, which is close to The upper limit of the service temperature of butyl rubber, after a period of repeated heating and cooling, aging and peeling will inevitably occur

However, since the thermal expansion rate of the metal material is 10×10 -6 / ℃~30×10 -6 / °C, but the coefficient of thermal expansion of the insulating material is less than 10×10 -6 / °C, there is a difference in thermal expansion coefficient between the coating and the mold substrate, which causes the thermal insulation coating and the substrate to peel off and fall off due to the difference in expansion during heating and cooling, reducing the thermal insulation effect

Also, in order to increase the heat insulation effect, the coating needs to be thickened, but when the coating becomes thicker, it is easy to cause cracking and peeling off

Moreover, the material cost of silicone resin itself is high. If the production frequency of the mold is too small, it will face the disadvantage that the cost has not been recovered, and the end of the life of the mold will lead to a loss.

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