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Production method for durable plastic surface waterproof building template

A technology of building formwork and production method, which is applied to the on-site preparation of building components, construction, building structure, etc., can solve the problems of insufficient bonding strength, short service life, low processing efficiency, etc., and achieve good formwork quality and service life. Long, productive results

Inactive Publication Date: 2013-01-16
WEIFANG LAIPUDE PLASTIC & WOOD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also has the disadvantages of complicated procedure, low processing efficiency and high production cost.
Although there are non-woven fabrics, cotton cloth, linen and other materials between the surface layer and the wood layer, the two layers are still connected face to face, and the bonding strength is not enough; moreover, there is a problem of water absorption in the lining layer, which will easily lead to glue opening or failure after repeated use. Delamination, short service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This embodiment includes the following steps:

[0018] 1) Substrate rolling hole: use 5-layer wooden plywood with a width of 1.22 meters and a length of 2.44 meters, and use a roller punching machine to roll and puncture the recesses on both sides of the substrate from the outside to the inside. Evenly distributed on the surface of the board, the distance between the edges of adjacent pockets is 15 mm, and the depth of the pockets is 1 mm.

[0019] 2) Preheating and dehumidification: Use an infrared electric heating device to bake the surface of the substrate after the hole is rolled, so that the surface temperature rises rapidly to 100 degrees, and removes the moisture in the superficial layer of the substrate.

[0020] 3) Extrusion coating: The plastic surface layer is made of polyethylene, which is extruded onto the surface of the preheated substrate by a plastic extruder, and spread on the surface of the substrate as much as possible.

[0021] 4) Roller lamination:...

Embodiment 2

[0026] This embodiment includes the following steps:

[0027] 1) Rolling holes on the substrate: select 7-layer wooden plywood with a width of 0.915 meters and a length of 1.83 meters, and use a roller punching machine to roll and puncture the recesses on both sides of the substrate from the outside to the inside. The recesses are evenly distributed on the board surface, and the edges of adjacent recesses The distance is 12 mm and the depth is 1.5 mm.

[0028] 2) Preheating and dehumidification: Use an electric heating plate to bake the surface of the substrate after rolling, so that the surface temperature rises rapidly to 180 degrees, and the water on the shallow surface of the substrate quickly evaporates.

[0029] 3) Extrusion coating: the plastic surface layer is made of polypropylene, which is extruded onto the surface of the preheated substrate by a plastic extruder and spread on the surface of the substrate.

[0030] 4) Roller lamination: While the substrate is being ...

Embodiment 3

[0034] Production step is identical with embodiment 1 in the present embodiment, and its difference is:

[0035] The substrate is 9-layer bamboo plywood with a width of 1.22 meters and a length of 2.44 meters. The distance between the edges of adjacent recesses is 22 mm and the depth is 2 mm. During preheating and dehumidification, the surface temperature of the substrate rises rapidly to 260 degrees. The plastic surface layer is made of polyvinyl chloride, and a certain amount of wood powder or light calcium carbonate and other fillers are added. The thickness of the plastic cover is 0.5 mm.

[0036] Choose the above-mentioned formwork and the existing glued plastic-wood composite building formwork, and put them into water for boiling test. After 11 hours of continuous boiling, the edge of the plastic surface of the glued plastic-wood composite building formwork cracks and bubbling phenomenon, while the plastic surface layer of the template made by the method of this embodi...

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Abstract

The invention relates to a production method for a durable plastic surface waterproof building template and belongs to the technical field of plastic wood composite building templates. The method comprises the steps of rolling holes on a base plate, preheating and dehumidifying, extruding and coating plastic, rolling and compounding, cooling and solidifying, and cutting and forming. After the base plate is subjected to hole rolling and preheating, hot-melt plastic is directly extruded onto the surface of the base plate by an extruding machine, the plastic coated surface is subjected to rolling and compounding by a pressing roller, and the plastic surface and the base plate are formed through rolling at one step, so that the production process is simple and high in efficiency. The surface and the base plate are intersected transversely and longitudinally and connected firmly, so that delamination and cracking are avoided, the service life is long and the quality of the template is high.

Description

technical field [0001] The invention belongs to the technical field of plastic-wood building templates, and in particular relates to a production method of plastic-wood composite building templates. Background technique [0002] Building formwork is an important construction tool for concrete structure engineering, and its quality is directly related to the quality, cost and benefit of engineering construction. According to statistics, in cast-in-place concrete structure engineering, formwork engineering generally accounts for 20% to 30% of the cost of concrete structure engineering, and accounts for 30% to 40% of the engineering labor. With the rapid development of my country's real estate industry, the amount of building formwork is increasing year by year. It is estimated that in 2012, the output of my country's building formwork industry will reach about 220 million square meters. Existing building formwork used mainly contains steel formwork, wood plywood formwork and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G9/05B32B27/06B32B27/30B32B3/06B32B37/08
Inventor 张胜刘永会张博
Owner WEIFANG LAIPUDE PLASTIC & WOOD TECH
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