Polyamide thermal barrier strip preparation technology

Abstract

The invention discloses a polyamide thermal barrier strip preparation technology, which mainly comprises the steps: formulation of raw materials, formation of alloy particles, drying, extrusion, pressurized flow distribution of a flow distribution plate and water model cooling formation; namely, the formulated raw materials are mixed and refined to alloy particles in a double screw extruder while even mixing is guaranteed, the alloy particles are dried in vacuum by using a drier, the alloy particles dried in the previous step are extruded to the flow distribution plate by using an extruder, a pressurization device is utilized to pressurize melts in an inner cavity of the flow distribution plate to achieve distribution, thereby ensuring adequate pressure inside the melts, a plurality of melts enter a water model cooling device under the action of the pressure of the extruder, and the water model cooling device instantaneously cools a plurality of melts from about 300 DEG C to 60 to 80 DEG C in order to achieve instant formation of the polyamide thermal barrier strip. The preparation technology with simple process can achieve instant and fast formation of a plurality of laminated polyamide thermal barriers, which dramatically enhances production efficiency and simultaneously ensures the quality of formed objects.

Description

technical field [0001] The invention relates to a production process of a heat-insulation strip, more specifically, a preparation process of a polyamide heat-insulation strip. Background technique [0002] According to statistics, building energy consumption accounts for a quarter of the country's total energy consumption, and the energy lost through the windows of ordinary buildings accounts for about 50% of the total energy consumption of buildings. Air conditioning is usually used to cool down in summer in the south, while existing ordinary buildings The thermal insulation effect of windows is not good, which leads to a large consumption of electric energy. In terms of building thermal insulation performance, the energy consumption of ordinary aluminum alloy windows in my country is 2.2 times that of developed countries. [0003] For this reason, after research, people use polyamide heat insulation strips to achieve the heat insulation effect of windows. The invention pate...

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Problems solved by technology

[0004] However, the heat insulation effect of the existing polyamide heat insulation strips in actual use cannot reach the overdue effect, mainly due to the quality problems in the preparation process of the polyamide heat insulation strips; A molding die is added to the extrusion end of the extruder to realize the extrusion of the melt, and it is formed by air cooling or built-in water cooling, and the pressure in the melt is gradually reduced during the process of extruding from the extruder to the mold. Small, this will affect the uniformity and quality of molding, and the current cooling method, it takes a certain amount of time to cool the melt, and polyamide is very susceptible to temperature changes, in the process of melt cooling With the continuous change of temperature, the shape will continue to change, so that there will be quality problems such as uneven thickness after molding, and the cooling time will be too long to reduce the production efficiency

[0005] In addition, the existing polyamide heat insulation strip molding technology has a limited number of heat insulation strips to be extruded each time during the production process, which greatly reduces production efficiency; moreover, most of the raw materials are made of nylon and glass fiber, which makes the product The medium performance is unstable, which affects the product quality after molding to a certain extent

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