Building formwork and method for manufacturing building formwork

Abstract

The present invention relates to the technical field of building components, particularly building formwork and a method for manufacturing the same. The formwork comprises a plastic core layer, wherein two or more pore units are provided on a cross-section of the plastic core layer in the thickness direction, the two or more pore units being arranged along the width direction of the plastic core layer. The pore units comprise two first portions located near the thickness-direction edge and a second portion located between the two first portions. The boundary line of the first portion is a curved line convex toward the thickness-direction edge, and the boundary line of the second portion comprises a first line segment parallel to the thickness direction, with the endpoints of the curved line connected to the endpoints of the first line segment. The present invention improves porosity while ensuring that the building formwork still has good flexural rigidity and low deflection, thereby reducing material usage and cost of the building formwork.

Claims

1. Building template, characterized in that, include: A plastic core layer (2), wherein two or more hole units (21) are provided on a cross section in a thickness direction of the plastic core layer (2), and the two or more hole units (21) are arranged along a width direction of the plastic core layer (2). The hole unit (21) includes two first portions (211) located near the thickness direction edge and a second portion (212) located between the two first portions (211). The boundary line of the first portion (211) is a curve (2111) protruding toward the edge in the thickness direction, and the curve (2111) is in the shape of a circular arc, or an elliptical arc, or a combination of a circular arc and an elliptical arc. The boundary line of the second portion (212) includes a first line segment (2121) parallel to the thickness direction, and the endpoint of the curve (2111) is connected to the endpoint of the first line segment (2121). The hole unit (21) includes two second holes (23), the two second holes (23) are distributed along the thickness direction, the second holes (23) are close to the edge of the thickness direction, the boundary lines of the second holes (23) include a third boundary line (231) close to the edge of the thickness direction, and a fourth boundary line (232) and a fifth boundary line (233) away from the edge of the thickness direction, the third boundary line (231) serves as the curve (2111), the fourth boundary line (232) serves as the first line segment (2121), the fifth boundary line (233) is perpendicular to the thickness direction, and the end point of the fifth boundary line (233) is connected to the end point of the fourth boundary line (232). The dimension of the fourth boundary line (232) in the thickness direction is 0.8 to 1.1 times the dimension of the fifth boundary line (233) in the width direction; The size of the fourth boundary line (232) in the thickness direction is 1.6 to 2.2 times the size of the third boundary line (231) in the thickness direction; A first connecting rib (25) is formed between two adjacent hole units (21) in the width direction, and the width of the first connecting rib (25) is 1 to 2 mm. The hole unit (21) includes a second connecting rib (26), the second connecting rib (26) is located between the two second holes (23), the second connecting rib (26) is parallel to the width direction, and the thickness of the second connecting rib (26) is 0.3-1 mm.

2. The building template according to claim 1, characterized in that The hole unit (21) further includes a third hole (24), the third hole (24) being located between the two second holes (23), the third hole (24) having a rectangular shape, the boundary line of the rectangle being parallel or perpendicular to the thickness direction, and the width of the third hole (24) being the same as the width of the second hole (23).

3. The building template according to claim 1, characterized in that The cross section of the plastic core layer (2) in the thickness direction includes an edge region (A) located at the edge and a middle region (B) located inside the edge region (A), the edge region (A) is a solid structure, and the pore unit (21) is located in the middle region (B); and / or the porosity of the plastic core layer (2) is at least 60%.

4. The building template according to claim 1, characterized in that The plastic core layer (2) is a rectangular parallelepiped.

5. The building template according to claim 1, characterized in that The material of the plastic core layer (2) is one of polyethylene, polypropylene, polyvinyl chloride and polycarbonate.

6. A method for manufacturing the building template according to any one of claims 1 to 5, characterized in that: The steps include: Heating the raw materials to a temperature at which they can be transformed into a molten state; extruding the heated raw material; Cooling and shaping the extruded raw material to obtain a product; The product is conveyed and cut off at a preset position to obtain the plastic core layer (2).

7. The method according to claim 6, characterized in that The extrusion rate is 0.002-0.005m / s.

Images