Foaming large parts by injection molding

The use of chemical blowing agents can be very interesting for manufacturers of large plastic parts, as they can benefit from a number of advantages without having to make a large investment. And these are not just the obvious benefits of reduced part weight and associated material savings.

The less obvious benefits of energy savings, cycle time reduction and improved mechanics are also likely to be of interest. For example, the product becomes more sustainable as less energy is required to produce the item.

Cycle time can be significantly reduced by using chemical foaming agents. The injection time can be reduced as the melt flows better due to the gas dissolved in the polymer. Cooling time can also be significantly reduced because the foam structure means that less mass, and therefore less thermal energy, needs to be cooled.

Other positive effects are that the composite structure of the component increases flexural rigidity. Furthermore, in the event of damage to the component, the foam structure slows crack propagation and reduces the tendency to splinter. The tendency to warp is significantly reduced by the use of chemical blowing agents. Sink marks are significantly reduced or eliminated by the internal gas pressure of the polymer melt.

In summary, foaming of large format components has the following advantages:
– It reduces material requirements and is sustainable.
– It offers significant advantages in the manufacturing process.
– It offers advantages in terms of product properties.
– It is economical.

To achieve the desired results it is sufficient to add the foaming agent to the plastic granules in small dosages (usually 0.5 – 3%). The chemical foaming agent can either be pre-blended with the plastic pellets or – even better – added with a separate dosing unit.

Under the brand name TRACEL® TRAMACO develops, produces and distributes chemical, endothermic and exothermic foaming and nucleating agents as well as microspheres. TRAMACO’s product portfolio is rounded off by other additives such as slip and mold release agents (TRASIL & TRASLIP), antistatics (TRAPOR & TRASTATIC) and UV stabilizers (TRASTAB).

Über die ROWA GROUP Holding GmbH

TRAMACO GmbH is a company which produces and supplies chemical foaming agents, primers and additives for the plastic, rubber and coatings industry.
An extensive product range comprises established branded products manufactured by TRAMACO like TRACEL®, TRAPUR®, TRAPYLEN®, basic raw materials from strong suppliers and customised products for applications in various industrial sectors. Since its foundation in 1973 TRAMACO GmbH has built up a global distribution and sales network and continues to develop dynamically. A motivated team is at customers’ service during the entire business transaction, from the initial contact to the execution of the order. The qualified consulting concerning technical applications and the development of customised formulas complete TRAMACO’s portfolio, making the company a competent and reliable partner for the industry.

Firmenkontakt und Herausgeber der Meldung:

ROWA GROUP Holding GmbH
Siemensstraße 1-9
25421 Pinneberg
Telefon: +49 (4101) 70606
Telefax: +49 (4101) 706203
http://www.rowa-group.com

Ansprechpartner:
TRAMACO GmbH
Telefon: +49 (4101) 706-02
E-Mail: info@tramaco.de
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