Precision quality
is our promise

Would you like to provide plastic products or components of the highest quality in a stylish design, creative and unique, made locally using cutting-edge techniques and processes? You are in the right place. Allgaier Kunststoffverarbeitung GmbH & Co.KG will provide advice, solutions and generally make all kinds of things possible when it comes to plastic products and the entire development process. Aside from producing creative and innovative solutions, our main aim is to expertly guide you through every step of the process, right from choosing the right plastic, to designing your item and dealing with the process engineering.


We will help you to choose the right process to suit your needs.

We will get you the right material, optimum technique, best option for post-processing and cheapest route to your ideal product. We do all of this with an eye on our and your quality standards, so we can ensure that your product batch runs smoothly right from the beginning.


Within compact injection moulding, or single-component injection moulding, we specialise in manufacturing complex, technical parts with a large surface area weighing 0.02–6.5 kg and in complex slider techniques. We use almost all engineering thermoplastics for this.

The skills we offer you:
- Cost-effective production of medium 
  to large quantities

- Production of high-quality,
  precision surfaces on a 
  wide range of products

Sandwich injection moulding

Sandwich injection moulding involves injecting two components one after the other into the same cavity. The two components are injected one into the other in such a way that the inner component is fully encapsulated by the outer component. 


- Compact outer, foamed inner:
  Thick-walled moulded components 
  with no sink marks and surfaces 
  like that look like compact injection 
  moulded parts

- Reinforced outer, unreinforced inner:
  Good rigidity/strength 
  at a lower cost on the raw materials

- Soft outer, hard inner:
  Sturdy components which look and 
  feel good

- Virgin outer, recycled inner:
  Of interest from a sustainability point 
  of view due to the use of recycled materials.

Multicomponent injection moulding

Multicomponent injection moulding enables us to combine different materials in a single item. The melt flows are channelled separately into the tool and combined to make a single component using specialist tooling technology.

- Combines different colours 
  in a single component
- Possible to integrate several functions 
  in one item
- Combines a hard component 
  with injected soft packing
- Solid functional components or 
  handles with a soft-touch surface

Thermoplastic foam injection techniques

Using chemical foaming, or thermoplastic foam injection, the plastic is foamed using a chemical propellant. This minimises the kind of sink marks that are otherwise unavoidable with thick-walled components. 
The thermoplastic foam injection method is characterised by a compact, low-porous outer and a foamed inner layer.

- Thick-walled injection moulded parts 
  with offset wall thickness

- Minimises sink marks and warpage,
  low machine costs as less
  clamping force required.

Gas counter-pressure techniques

The gas counter-pressure method is particularly suitable for thick-walled rod-shaped items. Gas is used in the production process to hollow out the interior. The cavity is first filled with plastic, then the second component, gas in this case, is fed into the same cavity to form a hollow injection moulded component.

- Reduction in sink marks
  and warpage whilst providing
  greater flexibility of design. 

- Suited to rod-shaped components 
   with strong walls

- Means thick-walled moulded parts can be made in the right design  
  with short cycle times while reducing the cost of materials and production.

MuCell ®

The MuCell® method is used to foam thermoplastics physically. Nitrogen or carbon dioxide can be used as propellants. 
Physical foaming can produce a much finer-structured foam than chemical foaming. This significantly reduces the density of the finished item.  

- Suited to thin-walled parts 
  with large flow path-to-wall
  thickness ratios

- Reduced density resulting in significantly 
  lower weight 

- Non-tensioned components with 
  fewer sink marks and less warpage


In coining, the plastic is injected into a tool which is not fully sealed under next to no pressure. Whilst the plastic is solidifying, the “press cake” evenly distributes the pressure of the tool closing.

- Larger flow path-to-wall 
  thickness ratios
- Reduced shrinkage
- Avoids sink marks
- Generally less tension and warpage