Fiber reinforced plastic mold and preparation method thereof

Abstract

The invention discloses a fiber reinforced plastic mold and a preparation method thereof. The mold comprises upper and lower layers of preformed fiber reinforced plastic matrices and is characterized in that an electric heating layer is paved between the opposite faces of the upper and lower layers of fiber reinforced plastic matrices; an insulating layer is coated on the external surface of the lower layer of fiber reinforced plastic matrix; wherein, the electric heating layer is composed of a sheath, an electric heating belt and heat insulation padding materials; a plurality of sheaths are paved on the internal surface of the upper layer of fiber reinforced plastic matrix side by side at intervals; the electric heating belts penetrate all the sheaths, the two ends of the electric heatingbelts respectively extend out of the two ends of the sheaths, wherein, one end is connected with the peripheral power source through a main power line, and at the other end, electric heating belts inthe two neighboring sheaths are connected end to end to form a loop; the external intervals of the two neighboring sheaths are filled with the heat insulation padding materials. The invention has theadvantages that each step in the preparation method requires solidification before continuing the next step; the structure is simple, the mold is heated evenly, thus effectively ensuring the qualityof molded products; simultaneously, the preparation method is easy to operate, the cost is low and the mold is easy to maintain.

Description

technical field [0001] The invention relates to a mold and a preparation method thereof, in particular to a glass fiber reinforced plastic mold and a preparation method thereof. Background technique [0002] The forming temperature of FRP products is generally between 15 and 25°C. However, due to natural reasons, the year is divided into four seasons, and the temperature in each season is different. In addition, the temperature difference between the north and the south of our country is large, especially in the north. Low, in addition, some resin systems in the production process of FRP products need to be cured at high temperature, so when the temperature is low, the production of FRP products needs to be heated. The heating method often adopts external heating methods, such as: curing furnace, generally for small products; infrared baking, Suitable for large and medium-sized products; electric hot air heating, etc. The disadvantages of adopting the external heating metho...

AI Technical Summary

Problems solved by technology

The disadvantages of using the external heating method are: 1) it is very easy to cause uneven heating of the product and deform the product; 2) due to the high local temperature, the glass fiber reinforced plastic product or mold will be damaged or even fire and other accidents will occur

However, this method also has the following defects: 1) The scale in the copper pipe is not easy to clean after long-term use, which affects the heat conduction effect; 2) It is necessary to use external forces such as pressure pumps to force water circulation, which is costly and expensive to maintain; 3) Once the copper pipe appears The problem is not easy to fix

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