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Process for producing building plastic formwork by co-extrusion method and compound mould

A technology of plastic formwork and composite mould, applied in the field of co-extrusion production of building plastic formwork process and composite mould, can solve the problems of poor surface strength and easy to be corroded, so as to improve surface strength, strong alkali corrosion resistance and service life prolonged effect

Inactive Publication Date: 2013-05-15
张琪彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a co-extrusion process for producing building plastic formwork and a composite mold for the common problems of poor surface strength and easy corrosion in plastic building formwork in the prior art

Method used

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  • Process for producing building plastic formwork by co-extrusion method and compound mould
  • Process for producing building plastic formwork by co-extrusion method and compound mould
  • Process for producing building plastic formwork by co-extrusion method and compound mould

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: see figure 1 , figure 2 and image 3 , the co-extrusion method to produce architectural plastic templates uses two sets of plastic kneaders at the same time, which are the surface layer kneader and the inner core layer kneader. Plastic extruders are combined to form two plastic extruder production lines, and the two plastic extruder production lines simultaneously pass through composite molds to form composite plastic building templates, and then sequentially pass through vacuum setting machines, tractors and cutting machines to form multi-layer composite plastic buildings template product. Wherein, the surface layer plastic extruder 6 and the inner layer foam plastic extruder 5 are connected with the composite mold in a mutually perpendicular manner, see Figure 4 .

[0022] From Figure 5 , Figure 6 and Figure 7 It can be seen that the composite mold 7 includes the inner core layer forming channel 9 and the composite layer forming channel 10 i...

Embodiment 2

[0024] Embodiment 2: The content is basically the same as in Example 1, the difference is that an inner layer foamed plastic extruder and two surface layer plastic extruders are used, each extruder is connected with a composite mold respectively, and the two surface layers The plastic extruders are installed sequentially, and two sets of the same co-extrusion method as in Example 1 are adopted, that is, the co-extrusion method and structure described in Example 1 are adopted between the first surface plastic extruder and the inner layer, The first layer of composite template is formed, and the second surface layer plastic extruder and the first composite template that have been formed adopt the co-extrusion method and structure as described in Example 1 to form a composite template with an inner and outer three-layer structure.

Embodiment 3

[0025] Embodiment 3: see Figure 3 ~ Figure 7 , the composite mold includes a shell, the front end of the shell is provided with a mold hole inlet, the front end of the shell is provided with a mold hole outlet, and the middle shell side between the mold hole entrance and the mold outlet is provided with a surface layer plastic feeding port, The inlet of the mold hole is connected with the outlet of the inner layer plastic extruder, the inlet of the surface layer plastic is connected with the surface layer plastic extruder, and an electric heating device is arranged on the upper part or the side wall of the shell; corresponding to the surface layer plastic inlet A co-extrusion mold is installed in the inner cavity of the shell, the middle part of the co-extrusion mold is provided with a composite layer forming channel, the width of the forming channel at the mold entrance is smaller than the width of the composite layer forming channel, and a surface layer Plastic storage cavi...

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Abstract

The invention discloses a process for producing a building plastic formwork by a co-extrusion method and a compound mould. At least two plastic extruder production lines are adopted; after an inner-layer foaming plastic extruder extrudes a prototype of an inner-layer plastic formwork, a surface-layer structure is extruded on the outer surface of the prototype of the plastic formwork by a surface-layer foaming plastic extruder; and then, a multilayered compound plastic building formwork product is formed through a vacuum sizing machine, a traction machine and a cutting machine in sequence. According to the process for producing the building plastic formwork by the co-extrusion method and the compound mould, waste plastic is used as a main raw material to form an inner layer and 20% of new materials are added to form an outer layer; and a brand-new plastic formwork is produced through a co-extrusion machining process; and the surface strength of products can be improved, the surface smooth finish is high, the strength is high and the compound mould is not easy to damage, the alkaline corrosion resistance is strong and the service life is greatly prolonged. According to the compound mould, surface-layer plastic can be uniformly collected to the center from a chute and pressure is generated; the pressure strength corresponds to an inner layer traveling speed; the utilization effect is good and the working efficiency is high; and the compound mould is very good for popularization and implementation.

Description

technical field [0001] The invention relates to a formwork production process in the construction field, in particular to a co-extrusion process for producing architectural plastic formwork and a composite mold. Background technique [0002] At present, the surface of the plastic formwork used in the construction field must be hardened, otherwise the surface will be corroded due to the strong alkalinity of the concrete when the formwork is combined with concrete, resulting in poor performance of the formwork or even scrapping. The existing building formwork The surface hardening treatment method is relatively simple, which is to directly cool the formwork after the exit mold with water or oil, so that the surface of the formwork can be hardened rapidly to form a protective layer. Practice has proved that the protective layer can improve the surface finish of the template, and to a certain extent play the role of anti-corrosion and easy demoulding without bonding with concret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/06B29C47/14B29C47/56B29C48/305
Inventor 张琪彬
Owner 张琪彬
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