1.blown into type
There are manual and mechanical blow molding two ways. In the process of manual molding, hold the blowpipe to pick up the material from the crucible or the opening of the pit kiln, and blow into the shape of the vessel in the iron mold or wood mold. Smooth round products by rotary blowing; The surface has the convex and concave pattern pattern or the shape is not the circular product USES the static blowing method. First picks the colorless material to blow into the vesicle, then picks the color material with the vesicle or the emulsion material to blow into the shape of the vessel is called the nesting material blowing system. With the color of fusible material particles on the opacified material, all kinds of natural melting flow, can be blown into natural utensils; In the color of the material with ribbon opacification material, can be blown into a wire drawing vessels. Mechanical molding is used for blowing large quantities of products. After receiving the material, the blowing machine automatically blows the mold into shape, and after demoulding, the cap is removed to form a vessel. Also can use pressure-blow molding, the first material into a small bubble (prototype), and then continue to blow into the shape of the vessel. It is more efficient and of better quality than pure blowing machine.
2. pressing molding
During manual molding, the material is cut into the iron mold by manual picking, the punch is driven and pressed into the shape of an implement, and the mold is removed after solidification and finalizing. Automatic production of mechanical molding, large batch, high efficiency. It is suitable for pressing and forming the small shape products, such as cup, plate, ashtray, etc.
3.centrifugal molding
The receiving material is in the rotating mold. The centrifugal force generated by the rotation makes the glass expand and close to the mold. Suitable for uniform wall of large glassware molding.
4. free forming
Also known as formless. With artificial material in the kiln before repeated baking modification or hot bond. Because does not contact with the mold, the glass surface is bright, the product shape line is smooth. Finished products also known as kiln glass products.