Google+

View Injection Molding Machinery by Brand: Arburg  |   Cincinnati Milacron  |   Husky  |   Niigata  |   Nissei  |   Toshiba  |   Van Dorn  |   More Brands Available - Click Here to View

Injection Molding Machines

PLASTIC INJECTION MOLDING MACHINES

In 1868, John Wesley Hyatt became the first person to inject hot celluloid into a mold, producing billiard balls. In 1872 John and his brother Isaiah patented an injection molding machine that used a plunger, and the process remained more or less the same until 1946. In 1946 James Hendry built the first screw plastic injection molding machine, which revolutionized the plastics industry. Roughly 95% of all plastic injection molding machines now use screws to efficiently heat, mix, and inject plastic into molds.

Injection molding machines consist of two basic parts, an injection unit and a clamping unit. Injection molding machines differ in both injection unit sizes and clamping units used. Several manufactures offer hydraulic clamps, toggle clamps or electric driven machines. The clamping mechanism moves either horizontal or vertical. Majority of the plastic injection molding machines purchased today are horizontal machines with a very similar layout to the diagram below.

plastic injection molding

Plastic injection molding is a manufacturing technique for making parts from plastic material. Molten plastic is injected at high pressure into a mold, which is the inverse of the desired shape. The mold is made from metal, usually either steel or aluminum, and precision-machined to form the features of the desired part. Plastic injection molding is very widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars. It is the most common method for the production of plastic parts.

Check our our Plastic Molding Machine Buyer's Guide.

Read how to prevent bubbles in plastic injection molding, a common plastic molding defect.

Plastic Injection Molding Machinery

featured machine
Horizontal
Injection Molding
Brand: Engel Electric
Tonnage: 310 ton Electric
Shot Size: 23.8
featured machine
Horizontal
Injection Molding
Brand: Husky QuadLoc Tandem
Tonnage: 2000 Metric 2250 US ton
Shot Size: 540
featured machine
Vertical
Injection Molding
Brand: Engel Tie Barless
Tonnage: 175 ton Vertical/Vertical
Shot Size: 15.4
featured machine
Vertical
Injection Molding
Brand: Nissei
Tonnage: 110 ton Vertical Rotary
Shot Size:
featured machine
Vertical
Injection Molding
Brand: Newbury
Tonnage: 300 ton Shuttle
Shot Size: 15
featured machine
Horizontal
Injection Molding
Brand: Cincinnati
Tonnage: 550 ton
Shot Size: 54
featured machine
Horizontal
Injection Molding
Brand: Sumitomo
Tonnage: SH550 606 ton
Shot Size: 77
featured machine
Horizontal
Injection Molding
Brand: Sumitomo
Tonnage: SH450 496 ton
Shot Size: 61


» View Our Online Inventory of Used Injection Equipment (Horizontal)
» View Our Online Inventory of Used Injection Equipment (Vertical)

Tags

used injection molding machines, plastic injection molding, plastic injection molding equipment, plastic injection molding machine, plastic injection molding machines, plastic injection molding machinery, plastic machines, used plastic injection molding equipment, used plastic injection molding machines, used plastic machinery, used plastic machines, injection molding machines, how do plastic injection molding machines work?injection molding machinery, injection machines, husky injection, used injection molding machines, thermoforming machines, used molding machines