A kind of multi-cavity vulcanization mold and preparation method

Abstract

The invention relates to a multi-cavity vulcanizing mould. Flow passages for viscous rubber to flow are formed in the multi-cavity vulcanizing mould; the flow passages include a first-layer flow passage, a second-layer flow passage and a third-layer flow passage which are communicated with one another, the first-layer flow passage is communicated with an injection opening of the multi-cavity vulcanizing mould; a plurality of temperature adjusting flow passages capable of promoting thorough mixing of the interior and the exterior of the viscous rubber so as to reduce the temperature difference between the interior and the exterior of the viscous rubber are formed in the second-layer flow passage; the third-layer flow passage is communicated with a vulcanizing cavity for vulcanizing a product required to be vulcanized. Through a design, rubber in the inner core and rubber on the outer wall are thoroughly mixed, so that the temperature difference between the rubber in the inner core and the rubber on the outer wall is reduced from the original 10 DEG C to 0.5 DEG C, the product vulcanizing time is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of rubber vulcanization, and in particular relates to a multi-cavity vulcanization mold and a preparation method. Background technique [0002] At present, the flow channels of rubber injection molds adopt a linear smooth path. When the rubber material flows in the flow channel of the smooth path, there is a laminar flow effect, which makes the temperature difference between the inner core and the outer wall of the rubber material cause this phenomenon. The reason is that when the rubber material flows in the mold flow channel, the outer wall of the rubber material is heated in contact with the mold and heat is generated by friction during the flow process, which causes the temperature of the outer wall of the rubber material to rise, and rubber is a poor conductor of heat and cannot quickly transfer heat to the mold. At the inner core of the rubber, there is a temperature difference between the outer wall of the rubb...

AI Technical Summary

Problems solved by technology

[0003] The existence of the temperature difference between the inside and outside of the rubber material makes the initial temperature of the rubber material entering the mold cavity lower, and it takes a longer vulcanization time to complete the vulcanization. In the application of large and thick products, this effect is even greater, obviously Reduce production efficiency, so how to eliminate the temperature difference between the inner core and outer wall of the rubber cross section of the runner, so that the internal and external temperatures are consistent is a problem that needs to be solved in the field of rubber vulcanization

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