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What is Desktop Injection Molding Machine?

Desktop injection molding machines are common mechanical processes used in various production cycles to permanently mold various materials, including plastics. Learn on this page what injection molding is, in which areas injection molding is common, plastic parts and objects manufactured, mold production, and precision molding of plastic materials.

What is injection molding?

The term “molding” encompasses the most diverse industrial production processes, where the least common denominator is the use of molds, which are the permanent forms necessary to model the product or component to be produced.

More specifically, it is a mechanical process of hot or cold plastic deformation that causes the material to fill the cavity between the two metal substrates, the die and the counter-die.

What is precision molding?

One type of molding is a desktop injection molding machine. Current technological developments require increasingly precise production techniques by which finished products, components, and miniature parts with complex geometries for automotive, computer, and other applications can be manufactured.

These components, which measure only a few millimeters and weigh 0.2 grams, require an injection volume of less than one particle and a geometry of less than one millimeter (micromolding).

How do these plastic injection manufacturing techniques work?

Plastic injection molding consists of five main stages, which we can summarize as follows:

  • The pellets are being prepared for injection.
  • The material is forced through the nozzle of the injection device into the gate, and finally evenly into the mold cavity.
  • Once the plastic material cools and hardens, the mold opens and the molded part slides off
  • Finally, the molding piece is completed by cutting the gate and the gate.
desktop injection molding

Several Skills of Perfect Molding Process

Although molding, even precision molding, is carried out by specialized machines, there are a few factors that need to be considered to achieve perfect results:

  • First, the molten plastic material is evenly distributed in the mold
  • In addition, the resin material must be selected according to the product to be manufactured, taking into account its chemical-physical and aesthetic properties
  • Last but not least, the molds must be designed and produced with the highest precision, so that there are no mistakes or stains that waste time and money

Type of forming machine:

  • Lectrically,
  • Hydraulics,
  • A servo drive,
  • Hybrids,
  • CNC machine tool

Many types of machines and presses are suitable for forming. In general, we can say that the molding machine consists of two main parts: a tabletop injection molding machine unit that feeds the molten material into the mold, and a clamping unit that manages the mold.

Common materials for desktop injection molding machines

Thermoplastics are plastics primarily used for injection molding because they have various competitive advantages:

  • Dimensional stability
  • Subjected to dynamic loading and aging
  • They maintain good mechanical properties even above 100 ° C

Structure or temperature resistance, which can be classified as:

  • Amorphous or semi-crystalline, i.e. transparent or opaque
  • Standard – often used at temperatures below 100 ° C – or high-tech polymer – can be used at temperatures between 100 ° C and 150 ° C

Desktop injection molding machine applications

The versatility of plastic polymers and their physical, chemical, and mechanical properties make them common in many fields, so much so that they can also be used to make objects or components that we use on a daily basis. More industries use molding or precision molding than others:

  1. Construction and housing
  2. Electrical, electromechanical and electronic
  3. Home appliance heating
  4. Food and Personal Care
  5. Industrial Automation
  6. Medical

The fairly rapid development of this technology and the increasing precision means that more and more companies are using benchtop injection molding machines to produce very small and geometrically complex components – especially electronic components, which are difficult to replicate in other ways.