GB2302840A

GB2302840A - Improved form making method

Info

Publication number: GB2302840A
Application number: GB9513808A
Authority: GB
Inventors: Tien-Sheng Chi
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-06
Filing date: 1995-07-06
Publication date: 1997-02-05
Also published as: GB9513808D0

Abstract

An improved form making method includes mixing a resin and hardening agent evenly, pouring a mixture of the resin and hardening agent into a form mould pre-coated with a release agent, such as wax or talcum, and spreading a layer of glass fibre on the mixture. The steps is repeated to obtain multiple layers of mixture and multiple layers of glass fibre before they are allowed to set. Forms of various sizes and shapes may be made. The forms thus moulded are reusable, light in weight, easy to install, safe and labour saving. Even wall surface may be achieved by use of these forms.

Description

IMPROVED FORM MAKING METHOD BACKGROUND OF THE INVENTION The present invention relates to a method of making forms. In particular, the present invention relates to an improved method of making forms of various sizes for use in construction work. In this connection, the method of the present invention is labour-saving and additionally, may achieve an even wall surface.

Moreover, such forms are light in weight, reusable and safe.

The conventional method of making wall forms in the construction of buildings is to join several wooden panels together in a row. Vertical stakes are then secured to the wooden panels by nails, or iron wires which are used to tie such panels and vertical stakes firmly together. Between every two vertical stakes, two horizontal stakes or yokes are tied to form a horizontal brace set. Diagonal braces are mounted from the position of the vertical stakes after the inner and outer forms are erected in the above manner. Screws are then passed through spaces between the two horizontal stakes or yokes, completing the formwork necessary prior to concreting.

There are a number of drawbacks in the conventional method of making forms described above.

For example, such erected forms are very heavy because of the wooden materials used and the method employed.

Additionally, wooden boards are susceptible to environmental factors, such as weather, humidity, atmospheric moisture, and acidic and alkaline metal contents in the air. Moreover, such wooden boards are not very firm and strong in structure. In this connection, exposure of such wooden forms to the sun after they have been soaked by the rain or immersed in water pools formed at the construction sites during progress will accelerate deterioration of their internal structure and hence, jeopardise work safety. In addition, wooden boards of a specific dimension are required for specific sizes of forms, which is very inconvenient. Additionally, since lumber is largely imported from foreign countries, such wooden forms are very expensive.Moreover, since the shape of wooden boards tend to become distorted after a period of time, consequently, such boards are not very suitable for use as horizontal bracings, and accordingly, such boards have a short useful life-span and hence, are not cost effective. In particular, for large scale construction projects such as the construction of high-rise buildings, use of such conventional wooden forms is indeed costly and moreover, they are not safe.

It is an object of the present invention to provide an improved method for making forms, comprising mixing resin and a hardening agent evenly, pouring the mixture into a form mould pre-coated with a release agent, preferably wax or talcum powder, and spreading a layer of glass fibre onto the mixture. Such steps are repeated several times to obtain multiple layers of the mixture of resin and hardening agent and multiple layers of glass fibre before they are allowed to set. Various shapes and sizes of forms may be moulded by adopting this method, and the forms thus moulded are light, safe, reusable, and may be quickly and conveniently installed at the construction sites. Furthermore, use of the forms of the present invention may result in even wall surfaces being obtained after such forms having been removed.

The foregoing and other features and advantages of the present invention will be more clearly understood from the following detailed description and the accompanying drawings, in which: Fig. 1 is a flowchart of the method of the present invention.

In a preferred embodiment, the method for making forms according to the present invention is directed to the making of wall forms, ceiling forms and the like.

With reference to Fig. 1, such method comprises mixing a resin and a hardening agent evenly, the amount of hardening agent depending on the hardening speed desired; adding colouring agents to the mixture, pouring the mixture into a form mould, and spreading a layer of glass fibre on the mixture. The steps are repeated several times to obtain multiple layers of the mixture and multiple layers of the glass fibre before they are allowed to set. The form mould is pre-coated with a release agent such as wax or talcum powder to facilitate release of the form. Various sizes and shapes of forms such as flat, wavy, curved, or angular forms may be moulded using such method. The forms thus moulded according to this method are light and consequently, easy to carry.They can be speedily installed in stages or in a continuous fashion so that, after concreting, substantially even wall or ceiling surfaces may be obtained. The drawbacks in the conventional method of form making are therefore eliminated. The trouble of examining the wall or ceiling surface after concreting as in the conventional method using iron wires to tighten the wooden panels is removed. Besides, the present invention may be employed to make forms having various shapes, such as cylindrical forms, forms with bosses, etc. The moulded forms according to the present invention are reusable, convenient in installation, labour-saving and safe.

Although the present invention has been illustrated and described with reference to the preferred embodiment thereof, it should be understood that it is in no way limited to the details of such embodiment but is capable of numerous modifications within the scope of the appended claims.

Claims

1. Method of making forms of various sizes and shapes, comprising the following steps of: (a) mixing a resin and a hardening agent evenly, (b) pouring a mixture of said resin and said hardening agent into a form moulded pre-coated with a release agent, (c) spreading a layer of glass fibre onto said mixture, wherein steps (b) and (c) are repeated to obtain multiple layers of said mixture and multiple layers of said glass fibre prior to setting.

2. A method as claimed in claim 1, in which the release agent is wax or talcum powder.

3. A method as claimed in claim 1 or 2, substantially as hereinbefore described and illustrated.