Cap with pull tab, TPE

Injection-moulded caps with pull-off tabs made from TPE are a Further development of the submerged PVC round caps and one in Appearance and precision optimised geometry of the submerged PVC round caps with pull-off tab.

The injection-moulded sealing cap with pull-off tab is mainly used when the against transport damage, penetrating dust and dirt protected connection element of a hose or pipe is to be quickly available for further processing. The non-slip pull tab of the mostly yellow TPE cap can be reliably with two fingers of one hand can be removed from the end of the pipe and is therefore ideally suited for use especially in the Automotive industry for Short cycle times on the assembly line to provide.

Economic advantages

A particularly interesting economic point is that a large number of standard tools are already available for the caps with pull-off tab.

This means:

• It must no new, in the purchase and Manufacture of expensive tools become
• Production can Started immediately become
• The Unit costs remain low, especially for large quantities

Process description - Production of caps with pull-off tabs made of TPE by injection moulding

The manufacturing process for injection moulding round caps with pull-off tabs made of TPE can be explained in simple steps:

Material provision

TPE (thermoplastic elastomer) is generally used as the material. The granulate, which is delivered as bagged goods or in large quantities in big bags on pallets, is fed to the feed hopper of an injection moulding machine via suction lines.

Material preparation

The granulate is melted in the barrel of the injection unit, which is heated by heating belts, homogenised by the rotary movement of the screw and conveyed towards the injection nozzle.

Injection process

The molten and viscous TPE is injected into the injection mould under pressure. To do this, the screw performs a rapid forward movement and presses the material previously conveyed in front of the tip of the screw through the injection nozzle and the distribution channels into the cavities of the cooled multi-cavity mould.

Cooling and curing

The material cools down and becomes solid again in the closed multiple injection mould, which is equipped with a cooling water circuit. This gives the injection moulded part its final shape and stability.

Demoulding

Once the moulded part has cooled sufficiently and become dimensionally stable, the mould opens, the finished cap with the pull-off tab is automatically stripped from the core, falls onto a conveyor belt and is temporarily stored in collecting containers until quality inspection. After demoulding, the manufacturing process described above is repeated.

Inspection and packaging

The caps produced are randomly checked, packaged and prepared for dispatch.