About Doing hot runner components by Yourself
Some mold builders will elect to buy the hot runner components, machine the hot half plates and install the system themselves to save money. In these cases, there are two options available. […]
How to Purchase a Hot Runner System
A key component in any hot runner system is the nozzle or drop. Nozzles fall into four main categories: torpedo, valve gate, edge gate and multi tip. Edge gate nozzles are used to gate on a part at 90 degrees to the parting line. There are two varieties of such nozzles. […]
Introduction to Market Trends of mold industry
market globalization has resulted in OEMs’ current strategy of launching new products on a global basis. In order to reduce costs and to guarantee high quality at all locations, the trend is for OEMs to separate the tooling from the injection molding, […]
What is Compression molding?
Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. […]
Introduction to Types of plastic extrusion
Sheet/film extrusionBlow extrusion of plastic filmFor products such as plastic sheet or film, the cooling is achieved by pulling through a set of cooling rolls (calender or “chill” rolls), usually 3 or 4 in number. Running too fast creates an undesirable condition called “nerve”- basically, inadequate contact time is allowed to dissipate the heat present [...]
How to do Screw design for plastic extrusion
There are five possible zones in a thermoplastic screw. Since terminology is not standardized in the industry, different names may refer to these zones. Different types of polymer will have differing screw designs, some not incorporating all of the possible zones. […]
Introduction to Plastics extrusion and Process
Plastics extrusion is a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weather stripping, window frames, adhesive tape and wire insulation. […]
How to Design an extrusion profile
The design of an extrusion profile has a large impact on how readily it can be extruded. The maximum size for an extrusion is determined by finding the smallest circle that will fit around the cross-section, this is called the circumscribing circle. […]
Introduction to Materials for extrusion
Metals that are commonly extruded include:Aluminium is the most commonly extruded material. Aluminium can be hot or cold extruded. If it is hot extruded it is heated to 575 to 1100 °F (300 to 600 °C). Examples of products include profiles for tracks, frames, rails, mullions, and heat sinks. […]
Introduction to all kind of extrusion equipments
There are many different variations of extrusion equipment. They vary by four major characteristics: […]