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Company news

Date

Topic

07 Jun 2022

Have you ever needed a small batch of rubber gaskets and invested a lot of money?

In most cases, technical rubber gaskets do not have standardised geometries and dimensions. Therefore, behind every batch of technical rubber or plastic articles, there is a large investment: one buys a mould specially made for this type of gasket. When we mass produce, the investment is amortised over a large number of moulded rubber technology projects. But what happens when we mould only small batches of rubber seals? In this article, we share the case history of one of our customers from the initial enquiry through to the final result.

Enquiry

A German company in the hydraulics sector contacted us about the moulding of some technical rubber articles. The requirements included the production of small batches of four different technical pieces. The issue was mainly an economic one, because the number of products produced was small, and the cost of the four moulds couldn’t be amortised.

Solution

Our team studied this case to find a good compromise between quality and investment scale. First, we analysed the technical articles in detail and studied their size and geometry: four different types, each with different geometries. Then we designed the moulds, or rather, the mould! Yes, for the four rubber gaskets, we designed only a single mould. The technical articles in question have simple geometries, so we were able to create a unique mould with multiple cavities each with a different shape.

We considered the production volume and calculated the number of cavities required for each piece for all batches to yield the final production target all at the same time.

Result

The result is a mould capable of producing four types of rubber gaskets. The customer was very satisfied because they obtained all the rubber seals they needed for a minimal outlay. In addition, the versatility of the manufactured mould will make it possible to re-mould only the required types of seals in the future.

George Lois said that "creativity can solve most problems." In this case, creativity and problem-solving skills are essential to create successful projects and meet customer needs. Washers, gaskets and flexible fellows are our daily bread. Do you have a new project to propose to us? Your rubber or plastic gaskets are our new challenge. Contact us for a free consultation!

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05 May 2022

Case History - Dual compound gasket

Pressure, challenges – is all an opportunity for me to rise” - Kobe Bryant 
  
Like Kobe Bryant, we too train in our own field: that of rubber- and silicone gaskets. The ball does not always hit the basket on the first shot, sometimes it takes a few more tries. This leads our team to challenge itself and raise the bar a little higher in order to score. 
  
We want to share with you a challenging project that required the combined skills of our team to achieve an excellent output. A client contacted us for the design of a technical rubber article, consisting of two distinct compounds each with a different hardness. This is the challenge: being able to combine the two compounds in a suitable way and to guarantee a high level of quality for the gasket. 
  
FIELD OF APPLICATION 
For every project we deal with, the starting point is always the field of application. In fact, we analyze the type of use of rubber gaskets in order to understand what features they need. In this case, the gaskets were to be used for the drainage of liquids; more specifically, to drain water into the ground.  
  
REQUIREMENTS 
Gaskets used for the drainage of liquids must have the following features: 
Thermal insulation; 
Resistance to atmospheric agents (UV/IR radiation, rain/snow, temperature, ozone, etc,); 
Impact resistance; 
Long life. 
  
OUR SOLUTION 
The gasket we have designed consists of two different diameters corresponding to two different compounds: a larger diameter ring (50 Shore compound) and a ring with a narrower diameter (90 Shore compound). In the production process, we moulded both parts of the gaskets in a single cycle using two different compounds with a distinct hardness. 
  
The result is a technical rubber article made of two materials: optically there is no difference between them, but the different hardness can be perceived by touch. The end result consists of a long-lasting rubber gasket that is resistant to thermal stress and weathering. 
 

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19 Apr 2022

#newcollection Technical rubber gaskets for E-automotive plugs and accessories


TECHNICAL RUBBER GASKETS FOR ELECTRIC CARS

 
In the automotive sector, rubber gaskets are essential for the proper functioning and safety of a vehicle. Recently, we have worked on a new project related to this sector, but with a green perspective. We’ve actually made some gaskets for e-car engines. Yes, our gaskets can also be used in the sustainability field! 



The functional characteristics required for this type of rubber gasket are as follows: 
Resistance to heat; 
Resistance to ozone; 
Resistance to atmospheric agents; 
Resistance to ageing; 
Resistance to highly aggressive oxidising chemicals;

Resistance to flammability.



In collaboration with our partners, we have designed a compound tailored to the customer’s needs and the finished rubber article. The compound is an EPDM with a hardness rating of 40 Shore.
Why did we choose this type of rubber compound? 
Firstly, because it presents a high level of elasticity, essential for automotive gaskets. Additionally, this compound is also highly resistant to temperature extremes.  In fact, our EPDM rubber compound maintains its properties from -45°C to +150°C. 
  
Why is EPDM compound suitable for the E-Mobility sector? 
Thanks to its isolating properties, this compound enables the production of gaskets that protect electric vehicle cables. The technical rubber pieces we made with our EPDM compound meet the flammability test according to the UL94HB standard. To us, this requirement was unavoidable, as the gaskets are designed for car engines. It should also be noted that it is rare to find compounds with a hardness of less than 50 Shore that meet the flammability test. For this reason, the compound testing phase was essential in preparation for the moulding phase.  

How did we monitor the quality of technical rubber gaskets? 

As a monitoring system we use IATF 16949 technical specification and ISO 9001:2015. The gaskets high quality is the result of a continuous properties control. In fact, firstly we tested the compound. Then, we verified the gaskets critical dimensions during the entire manufacturing process: after the first moulding cycle, in the middle of the production and in the final phase. 

At the end of the production and before shipping, we made a random selection, checking each technical rubber article.  
These technical rubber gaskets have already been used to produce e-cars, aiming to make public transport more sustainable and limit any environmental impact. 

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