CUMSA Comercial de Utiles y Moldes, S.A.

J. Ramon Jimenez, 8, 08960 Sant Just Desvern
Telephone +34 93 4732552
Fax +34 93 4734919


Hall map

K 2016 hall map (Hall 1): stand D26

Fairground map

K 2016 fairground map: Hall 1

Our range of products

Product categories

  • 03  Machinery and equipment for the plastics and rubber industries
  • 03.06  Moulds and dies
  • 03.06.004  Standard parts for moulds

Standard parts for moulds

Our products

Product category: Standard parts for moulds

Double Rack System

Fast delivery of the required draft.
Vertical function maximizing strength.
Complete flexibility for the moulding insert dimension.
Eliminates the need for high-precision angled housings in the core plates.
Smaller and less expensive injection machine required.
Possibility to produce angles bigger than ±20º upon request.

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Product category: Standard parts for moulds

Vacuum Solutions

Cumsa, has developed a system for eliminating the air trapped within a mould cavity before the injection cycle begins. Because the system works on a vacuum principle, the solution to the problem does not require altering injection parameters.
Conventional means of removing air trapped in the cavity when the mould closes—air that is heated and compressed by the plastic—involve using the plastic melt to exert positive pressure on the air pocket. The injected material pushes the air out of the cavity through the clearances around ejectors, through inserts created for the purpose, through porous-material inserts, through air vents on the periphery of the cavity, or by other methods. In each of these cases, injection parameters stray from the optimal and complete filling of the cavity becomes more difficult to achieve.
The most effective solution to the problems arising from this would seem to be to remove the air from the cavity before injection takes place. That is what Cumsa’s system does, by applying a Venturi system that functions with a standard air pressure of 6 bar. It requires that the mould be hermetic, with no air vents. The system translates the 6-bar pressure into negative energy: when the air is sucked out of the cavity, the resulting vacuum allows the plastic mass to flow freely and fill the whole cavity easily.
Using this system, moulders can produce parts with uniform colour, with few sink marks and invisible weld lines, an even structure and dimensional stability, and strong mechanical resistance.
Cumsa has created two models of the system—VacuumJet and Vacuum&Blow—which have different capacities in order to cover the requirements of the majority of moulds. If necessary, two or more systems may be grouped together to achieve higher performance. This system is suitable for all thermoplastic injection moulds and for all materials injected. The system should be installed at any mould area not exceeding 110°C of temperature.

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About us

Company details

CUMSA is a family company dedicated to the design, manufacturing and distribution of innovative standard solutions for the moldmaking and molding industries. Apart from our direct branches in Portugal, Italy, China and United States, we also have a complete distribution network in over 40 countries, this gives the chance for our products to arrive to every single moldmaker or molder around the world.

One of our main focuses is our R+D department, which is always in close contact with the customers allowing us firsthand access to new problems in the market and therefore giving us the opportunity to look for new solutions. This method of working has enabled the development of the complete catalogue of innovative solutions that are currently available.

Our goal is to create innovative standard parts for the moldmakers, molders and end users, bringing them new solutions and advantages in terms of time reduction in manufacturing, assembly and adjustment, as well as minimizing the production downtime and eventual costs.

CUMSA is also a company dedicated to service, our customers’ needs are very important for us, for this reason, if you feel that there is any way in which we can serve you better, we would like to hear your opinion.

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Company data

Sales volume

5 - 20 Mill. US $

Export content

> 75%

Number of employees

31 - 100



Area of business

Semi-finished products, technical parts and reinforced plastics

Target groups
  • Plastic product manufacturing
  • Vehicle construction / aerospace
  • Electronics / electro technology
  • Construction / building and living
  • Sports / leisure