What are the methods for forming glass?
Release Time:2019-08-01 15:03:35

There are many methods for glass forming, mainly including pressing method, drawing method, rolling method, casting method and the like.

First, the suppression method

Pressing method: a method in which a molten glass is injected into a mold, a mold ring is placed, a punch is pressed in, and a product is formed between the punch and the mold ring and the mold.

Process characteristics


Accurate shape, outer pattern products, simple process and high production capacity


1. The inner cavity of the product cannot be enlarged downwards, otherwise the punch cannot be taken out, and the side wall of the inner cavity cannot have a convex or concave place;

2. It is not possible to produce products with thin walls and inner cavities that are long in the vertical direction;

3, the surface of the product is not smooth, often with spots and mold seams;

Application: Solid and hollow glass products, glass bricks, water cups, vases, tableware, etc.

Second, the drawing method

Drawing method: It is a method of injecting molten glass into a model and drawing it into a product by a mechanical means through a cooler.

Application: Mainly used in the production of glass tubes, rods, flat glass, glass fiber, etc.

Third, the calendering method

The rolling method is a method of calendering a molten glass liquid between rolls or rolls to form a glass product.

Application: thick flat glass, engraved glass, wired glass, etc.

Fourth, casting method

Casting method: a method in which a molten glass liquid is injected into a mold, cooled by annealing, and processed to obtain a product.

Process characteristics: low equipment requirements, small product restrictions, suitable for large-scale products, but the accuracy of products is poor.

Main applications: art carving, architectural decorations, large diameter glass tubes, reaction pots.