What is the mould temperature?
A common range typically lies between 300 and 800°F (149 and 426°C). The temperature maintained in the mold is equally as important as the temperature profile in the barrel. The mold is maintained at a lower temperature than the barrel to allow the plastic to cool.
What is frog in brick?
Explanation: Frog is an indentation or depression on the top face of a brick made with the object of forming a key for the mortars. This reduces the weight of the brick also. It is kept on the top face while constructing a wall so that mortar is filled properly in it. Size of frog = 100mm × 40mm × 10mm.
What is the minimum thickness of injection molding?
However, as a rule, the minimum wall thickness for conventional injection moulding is 0.3mm, and even then it depends on the characteristic of the part itself.
What is hot half in mold?
Complete hot runner systems already assembled inside the manifold base, ready to be installed in the mould. Hot half multi cavity systems up to 144 cavities. Calculation of correct balance between the size of the moulded parts and the standard nozzles in order to achieve the best cycle time.
Why is injection moulding so expensive?
Since plastic products created using injection moulding are generally smaller and more intricate than those created by rotomoulding, there is naturally a higher investment of time and labour involved in creating them, which can ultimately increase the cost.
What is low volume systems?
Low volume irrigation systems (sometimes referred to as drip or trickle irrigation) are among the most effective means of achieving significant water savings. Despite the tremendous potential for water conservation, these systems are not widely used in residen- tial landscapes.
What is thickness formula?
Divide the plate volume by the surface area to calculate the thickness. In this example, the thickness is 15.5 cubic cm / 96.774 square cm = 0.16 cm or 1.6 mm.
What is Mould pressure?
During injection molding, the hold pressure, or pack pressure, is used to finish the filling of the mold and pack the part. The rule of thumb is that the hold pressure is 50%–70% of injection pressure. The hold pressure is applied against a pad or cushion of material (usually 1–3 mm).
What are the advantages of vacuum Moulding?
Since vacuum forming is a particularly simple form of thermoforming, the cost of the manufacturing process is significantly lower than with injection moulding methods. The production process is straightforward, the machinery is less costly, and the fluoroplastic materials themselves are also available at low cost.
What causes back pressure?
Back pressure may be caused by bends in the system, a reduction in diameter, obstructions, or a combination of these factors and others. Due to air resistance and molecule friction, the build-up of pressure reduces flow. This forces any additional pressure to meet a continued back up of pressure.
