PRESSBLOWER Injection Blow Moulders. Pressblower DSE 80 Pressblower DSE 150 Pressblower DSE 260

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1 PRESSBLOWER Injection Blow Moulders Pressblower DSE 80 Pressblower DSE 150 Pressblower DSE 260

2 Tasks Worldwide the Pressblower Injection Blow Moulding technique of Ossberger is renowned and well-established for the production of automotive components. Today this involves mainly constant velocity joint boots for the drive shaft bellows for the steering system dust bellows covers for shock absorbers shock absorber applications steering bellows More and more the trend to reduce raw material use is getting obvious; consequently the plastics products are to be designed as compact as any possible. At the same time environmental aspects are playing a growing role why the use of recyclable plastics grades turns out to be a crucial target. The Pressblower models DSE 80, DSE 150 and DSE 260 are meeting these trends to full extent. In particular this counts for two products of the automotive industry which show great growth potential: jounce bumpers for suspension struts (also called bump stops) compact CV joint boots jounce bumpers compact boots

3 Solutions Compact CV Joint Boots: At first glance it seems that the compact CV joint boots for drive shafts which will increasingly be used in the future are just the smaller version of those which are already common in the market. But let s look behind the curtain: The compact boots demand more and more outstanding quality with respect to production and process features since the definition of the parison which will be blow moulded requires substantial control on a significantly higher level; at the same time more stringent tolerances have to be respected. production station Jounce Bumpers: Jounce bumpers (which are also called bump stops) are used in every shock absorber of an automobile to increase the driving comfort considerably. To date they are produced either of a microcellular PU elastomer or of rubber. But these traditional materials imply two disadvantages: Firstly: They cannot be recycled. And secondly: The product weights are already optimized. Furthermore the design of the novel jounce bumpers now to be manufactured of a thermoplastic copolyester elastomer offers the chance to reduce not only the total weight of the assembly system but also the number of components and as a logic consequence its total price. This is due to the fact that now a combined product will be manufactured which includes the jounce bumper itself as well as the dust bellows. The quality requirement towards the manufacturing process to make a jounce bumper is huge. In particular this applies to the wall thickness distribution within the convolutes of the product and the tolerances to be kept. With the new Pressblower generation a solution for these challenges is offered like it is for compact boots.

4 The PRESSBLOWER Process - At the beginning of the cycle the injection mould with the recessed shape of the head section moves downwards onto the ring nozzle closing it tightly. So a cavity is obtained which in the first working step is filled with a defined quantity of melt. This way the small end diameter, e.g. of a CV joint boot, is precisely injection moulded. - In the second step the injection mould moves upwards; at the same time a defined quantity of material is extruded from the ring nozzle following the drawing speed of the injection mould. Retained in the injection mould at the one end and in the nozzle at the other a tubular parison with an exact wall thickness distribution is formed. - After the drawing step the blow mould closes around the parison for blow moulding it in the third working step. - In the fourth phase the blow mould and the injection mould open to release the part to a gripper for its transport to the bottom cutting device to trim it to its final length (optionally a top cutting device can be used what might be necessary in some cases, e.g. for air spring bellows). 1st step: injection mould meets nozzle parts for injection moulding of head section 2nd step: Drawing of parison with closed loop speed and nozzle gap control 3rd step: Blowing of parison 4th step: Cutting to dimension and final design

5 PRESSBLOWER models DSE 80, DSE 150 und DSE 260 Example of a stroke profi le setting of the nozzle cone Overview page with direct access to monitor pages The new Pressblower generation represents the consequent follow-up of its predecessors. Specifi cally it is targeting various future products: - In the future CV joint boots for the driveline will be designed in a more compact, lighter and more spacesaving way. At the same time the quality requirements increase, especially regarding the wall thickness tolerances. - As before the range of products allows the manufacture of steering bellows. - Jounce bumpers for shock absorbers will be made of thermoplastic copolyester elastomers in the future. The product quality requirements can only be achieved if a high-precision blow moulding process is applied i.e. the Pressblower Injection Blow Moulding process of Ossberger. These future products can be manufactured reliably on the new machine generation bearing in mind that it offers a number of new advantages: - The size of the accumulator head is laid out for the product size concerned. - The drawing unit represents an electrically driven axis. - The gripper unit will be driven electrically in horizontal as well as in vertical direction. - A top cutting device can be actuated. In this case the trimming of both ends takes place simultaneously what can lead to a cycle time reduction. - To keep mould expenses low it is ensured that existing injection moulds, blow moulds and cutter parts can be used on the new machine generation. - The control cabinet is mounted to the machine frame so the unit is more compact and space-saving. - The operating panel is mounted to a jib-arm in a comfortable position. view to the control cabinet side

6 OSSBERGER GmbH + Co Plastics Technology Company Address: Mailing Address: Phone: Fax: Internet: Otto-Rieder-Str. 7 D Weissenburg/Bavaria P. O. Box 4 25 D Weissenburg/Bavaria Germany / / [email protected] Reserve to changes