Method for making two-in-one all-wood-plastic composite building formwork

Abstract

The invention relates to two-in-one plastic-wooden composite building formwork and relates to the technical field of building formwork. The upper surface and the lower surface of a PVC (polyvinyl chloride) foamed layer are provided with PVC unfoamed layers. A production method of the building formwork includes: firstly, mixing PVC powder, calcium powder, lignin and auxiliaries via a high-speed mixer, heating up the mixture to 120 DEC C prior to cooling the mixture to 55 DEG C via a low-speed mixer and feeding the mixture to a double-screw 80 extrusion equipment mainframe to realize foaming; secondly, feeding the PVC powder into a double-screw 65 extrusion equipment mainframe without foaming; thirdly, feeding the foamed PVC powder and the unfoamed PVC powder into a distributor for mixing; fourthly, extruding the powder mixed in the third step via a mold; fifthly, subjecting the formwork extruded in the fourth step to cooling molding at the temperature of 10 DEG C via a shaping platform; sixthly, cutting the formwork shaped in the fifth step into a finished product, and packaging and warehousing the finished product. The two-in-one plastic-wooden composite building formwork is extremely low in maintenance cost, higher in connection strength, better in strength and less prone to breakage; cost is lowered greatly.

Description

Technical field: [0001] The invention relates to the technical field of building templates, in particular to a two-in-one all-wood-plastic composite building template. Background technique: [0002] At present, the existing building templates in the market are mainly wooden templates. Wooden templates were the first to be used. Because a large amount of wood is consumed, and the disassembly of the templates is easy to split, the loss rate is high. Generally, the number of turnovers is 4-6 times. It is not suitable for forest resources. my country, which is not rich, should seek alternative products. Steel formwork: This formwork is a substitute for wooden formwork, and the products are standardized and formed into series. Its advantage is that it can save a lot of wood and can be reused many times. The turnover rate can reach 40 times, but it also has many disadvantages: [0003] ①, high cost, the average price is 280 yuan / square meter, far higher than the price of wood-pla...

AI Technical Summary

Problems solved by technology

[0003] ①, high cost, the average price is 280 yuan / square meter, far higher than the price of wood-plastic formwork;

[0004] ②, bulky, inconvenient for hoisting and disassembly during construction;

[0005] ③. Due to the weight limit, the area of ​​a single formwork is not large, and the number of splicing blocks in use is large, which is time-consuming and laborious;

[0006] ④. The steel formwork has a certain affinity with cement. When the formwork is disassembled, it is easy to scratch the surface of cement products such as columns or beams, which affects the quality;

[0007] ⑤, steel formwork is easy to rust

[0008] The strength of the existing PVC-skinned foam board is not suitable for use on construction sites, and the edges of the board are fragile when demoulding

And the cost is high, and the product requirements are very high

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