CN1033470A

CN1033470A - Easy demoulding assembled formwork

Info

Publication number: CN1033470A
Application number: CN 87107826
Authority: CN
Inventors: 陈广骥; 顾刚戌; 陈克伟
Original assignee: Railway Engineering Research Institute of CARS
Current assignee: Railway Engineering Research Institute of CARS
Priority date: 1987-12-05
Filing date: 1987-12-05
Publication date: 1989-06-21

Abstract

A kind of easy demoulding assembled formwork, bamboo-wood plywood is handled through surfacing and back cover, surface treatment paint is Lauxite, phenolic resins, various synthetic latexs, organic materials such as natural emulsion are as cementitious matter, and inserts is based on carbon black, quartz powder, lithopone, gummed material: inserts=60～80%: 20～40%, can improve the template number of turnover to 40 through handling, to improve water-fast, alkaline-resisting, the oil resistant and the abrasive resistance of template, to make template be easy to the demoulding simultaneously.

Description

Easy demoulding assembled formwork

Use when the present invention relates to a kind of placing of concrete member, dismountable and repeat the easy demoulding gang form of assembly unit.

Known building construction or civil engineering template mostly are wood or steel form, and Austria uses steel wood gang form, and it forms template by the plywood gummed, and spandrel girder adopts wooden gummed i beam or trusses more.China carries out novel patent announcement 86210350 and proposes a kind of bamboo-wood plywood, these template applications are in the concrete masonry units engineering, particularly in the engineering component that pours on the spot, the major issue that need to solve is a fast demoulding and prolong the application life of template how, improve the number of turnover, aforementioned Austrian steel wood gang form adopts the organic silicone oil release agent, the price comparison costliness, a large amount of use is the comparison difficulty.

Task of the present invention is to propose a kind of easy demoulding assembled formwork of handling through special coating, low price, and stripping result is good, and the mechanical damage in the time of reducing the demoulding of template increases the template number of turnover.

Invention is achieved in that a kind of easy demoulding assembled formwork, by bamboo, wooden agglutination formwork, the metal connecting piece, support member is formed, template is by bamboo, wood, form forming laminated sheet material through hot-press gluing, above-mentioned bamboo, wood glue closes and adopts Lauxite and phenolic resins or various synthetic latex, organic materials such as natural emulsion carry out surfacing, carrying out edge sealing with polyurethane paint or epoxy glass phosphor flake coating handles, the gummed material of surface treatment paint is a Lauxite, phenolic resins, various synthetic latexs, natural emulsion are main, and inserts is with carbon black, quartz powder, lithopone etc. are main.Its match ratio is: gummed material: inserts=60～80%: 20～40%.Template can adopt multilayer bamboo and wood plate gummed, or by the yellow establishment of thin bamboo strips used for weaving, the bamboo-wood plywood that gluing hot pressing forms.

Assembled formwork of the present invention has following advantage: the quiet modulus in elasticity in bending of (1) bamboo plywood is 2-3 a times of wood plywood, uses bamboo-wood plywood can reduce the placement density of joist and support.(2) handle through surfacing and edge sealing, improved water-fast, alkaline-resisting, the oil resistant and the abrasive resistance of template.(3) reduced the engineering cost that the demoulding is handled.

Fig. 1: flat die plate embodiment

Fig. 2: shuttering embodiment

Now further narrate embodiments of the invention in conjunction with the accompanying drawings:

Referring to Fig. 1: the production of flat die plate 7 and crossbeam 5, longeron 6 has made full use of current wood processing technique and bonding technique.Template 7 can adopt multilayer bamboo and wood plate gummed, or by the yellow establishment of thin bamboo strips used for weaving, the bamboo offset plate that gluing hot pressing forms or set up the bamboo-wood plywood that some meagre face sides compactings form.Longeron 6, crossbeam 5 adopt wooden gummed section bar, and as I shape, rectangle, trusses etc., support member comprise the cramp bar of fixing with tripod 15 16, and setting height(from bottom) trimming piece 1 on the cramp bar 16 is worn pin 2, establishes many places and heightens pin-and-hole 3.Support member 16 is a four-way head 4 with the metal connecting piece of longeron 6.Flat-die is used for house floor, the perfusion on the spot of beam.At this moment side form 10 is fixing by forestick 8, is bearing on the short beam 12, and member and bed die 9 are placed on the bolster 11, and beam bottom support head 13 is used to support short beam 12.

Referring to Fig. 2: shuttering 22 is supported by diagonal brace 21 by upright retaining 23, same setting height(from bottom) is finely tuned 1, wears pin 2, heightens pin-and-hole 3, is linked by diagonal brace head 19 and formwork erection 22 on the diagonal brace, be fixed on the stow-wood 17 by diagonal brace seat 20, two-layer interval shuttering 22 is supported by fastener 22, and formwork erection can be used for the concrete component of buildings such as building construction midwall column, bridge pier.

The prescription that coating is handled on the top layer mainly contains three kinds:

Example 1: 100 parts of urea formaldehydes add 30 parts of butyronitrile latex (or neoprene latex, natural emulsion), are applied to bamboo material surface after fully stirring, and are once hot-forming then.

Example 2: first is formed part 100 parts+second and is formed 20 parts of parts

First is formed part and is comprised: 20 parts in 80 parts+phenolic resins of urea formaldehyde

Second is formed and part to be comprised: 20 parts of butyronitrile latex (or neoprene latex, natural emulsion)

Example 3: first is formed part 100 parts+second and is formed 30 parts of parts

First is formed part and is seen example 2

Second is formed part and is comprised 100 parts of butyronitrile latex (or neoprene latex, natural emulsion).

30 parts of+carbon blacks

Claims

1, a kind of easy demoulding assembled formwork is made up of bamboo and wood veneer, metal connecting piece, support member, and feature of the present invention is: must satisfy following two conditions simultaneously:

-adopt Lauxite and phenolic aldehyde or organic materials such as various synthetic latex, natural emulsion to carry out surfacing to the bamboo and wood veneer, carry out edge sealing with polyurethane coating or epoxy glass phosphor flake coating and handle;

-template adopts the bamboo and wood glued mould, forms forming laminated sheet material through gummed, hot pressing.

2, easy demoulding assembled formwork according to claim 1, it is characterized in that: the gummed material of surface treatment paint is Lauxite, phenolic resins, various synthetic latexs, natural emulsion, inserts is based on carbon black, quartz powder, lithopone etc., and its match ratio is: gummed material: inserts=60～80%: 20～40%;

3, easy demoulding assembled formwork according to claim 1 is characterized in that: template can adopt multilayer bamboo and wood plate gummed, or by the yellow establishment of thin bamboo strips used for weaving, the bamboo-wood plywood that gluing hot pressing forms.