07-10
Gas assisted injection molding is a special injection molding technology developed on the basis of traditional thermoplastic injection molding technology, which is suitable for special performance req...
A thermoplastic assembly is made by joining two pieces of plastic, or plastic and one other material, using Heat Staking equipment. Using this technology, thermoplastic assemblies can be created that are safe, dependable, and inexpensive. The Heat Staking method eliminates away with the need for hardware in the construction, like rivets and screws.
The following industries use Heat Staking assemblies in their manufacturing processes:
Automotive
Aerospace
Medical Test
Medical Device
Telecommunications
Consumer Products
The material distorts when heated over the glass transition temperature. Either extremely hot air or a thermode are used for this. Pressure is then used to create the stake. Once the stake has been created, the plastic should be cooled once more below the glass transition temperature. Cooling is done under constant pressure to make sure that the pieces are attached correctly. Compressed air can be used to cool the thermode when in use.
Heat aids in the development of the stake. In particular for glass-filled polymers, whose process window frequently drops below 10 degrees Celsius, controlling heat is crucial. When the temperature is too high and the glass fibers escape from the plastic, the plastic turns rough and sticks to the thermode. Due to cold deformation, plastic will crack if the temperature becomes too low.
The electrical resistance produces a heating effect when the current flows through the heating tip. The tip of the heat staking is in contact with the thermoplastic part to be reformed. For a short period of time, the heating tip is then heated by direct electrical heating. The heated tip makes the plastic material soft and causes the melted plastic to form the shape of the tip.
Then use the compressed air to cool the tip and the reformed plastic. Multiple points, including a variety of polymers, can be staked simultaneously. The cycle time depends on the volume of polymer to be reformed. Heat staking technology can be applied in varying degrees of complexity according to customer requirements. From simple time-controlled open-loop systems to complex temperature-feedback closed-loop systems.
Links between similar and dissimilar materials, such as those between metal and metal, plastic and plastic, and metal and plastic, can be formed.
Working with precision within a limited process window
Localized heating without endangering nearby items
Processing of glass-containing materials
Mechanical vibration are eliminated
With properly designed tools, a variety of heat-stake shapes are possible.
While there exist a variety of industrial processes for high-quality plastic assembly, heat staking continues to gain big market share for the industry. Industrial products in the past were connected using hardware fasteners, but this method became obsolete after heat staking technology became the industry standard.
Heat Staking technology does not need additional hardware that can suffer from defects, breaks, or other quality control issues. In addition, hardware fasteners have the tendency to be more costly and labor intensive than heat staking options for plastic assembly.
