The professional 2K injection moulding construction of a 2K injection moulding tool is the basis for the production of high-quality and visually appealing injection moulded parts. The individual requirements for the injection moulded part are recorded and taken into account as far as possible in the design of the injection mould.
The result is a 2K injection moulding tool suitable for series production, which usually delivers injection moulded parts of the highest quality far in excess of the guaranteed output quantity.
Process steps in 2K injection moulding design
The design of 2K injection moulded components involves several critical process steps. Firstly, the component geometry is designed to be 2K-compatible. Depending on the component, injection moulding options, sealing surfaces, support areas, etc. must be modelled.
At the same time, the choice of material and the compatibility of the plastics for 2-component injection moulding production are evaluated. Decisive factors include adhesion of the materials to each other, melt temperature, material shrinkage, etc. Find out more about the various material combinations.
This is followed by the actual design of the 2K injection moulding tool. The first step is to decide which basic 2K concept is suitable (see below). The mould is then designed with the help of CAD software.
In the constructive design, factors such as the removal of undercuts, the possibility of ejection, sufficient ventilation and cooling, surface requirements and much more must be considered and implemented, as with the classic 2K injection moulding design.
Once the construction has been finalised, drawings of the assembly and individual parts are created and transferred to the toolmaking process. The CAD data is also released and used for CAM-supported production.
Mould concepts in 2K injection moulding (extract)
Turning technology
With rotary moulds, a pre-moulded part is first produced in a cavity in the first process step. This is followed by a horizontal rotary movement in which the pre-moulded part is rotated into the second cavity. The second component is then injected into the second cavity, while another pre-moulded part is injected into the first cavity at the same time.
Depending on the part geometry, the described rotary movement can be performed by the complete ejector-side mould half or by individual mould elements, such as a stripper plate or an insert. The great advantage of this process is the simultaneous injection of both components and therefore short cycle times.
Transfertechnician
The pre-moulded part is transferred to the second cavity with the help of a robotic system or by hand (small series). In this process, the pre-moulded part and the finished part are also produced at the same time, resulting in short cycle times.
Other advantages compared to turning technology include simpler mould technology, the possibility of thermally separating the different states, use of the robotic system for upstream or downstream operations and much more.
Core-back technique
In the core retraction process, the cavity is expanded by pulling a slide or core to inject the second component. In principle, this allows simpler geometries to be realised and the production process is sequential.
However, the process can also be used in combination with the turning process and then offers the above-mentioned advantages.
From the idea to production - everything under one roof
We stand for pioneering solutions made of plastic
The benefits of collaboration with HECHT + DIEPER
HECHT + DIEPER is your expert in injection moulding of plastics.
Expertise
During development, our customers benefit from our many years of expert knowledge, in the area of design, our own toolmaking, as well as our competence in production.
Partnership
Together - as specialists, we know that only the joint development of components is the best prerequisite for the optimal functionality of your product.
Experience
Since more than over 40 years we have been developing and producing technically challenging components of the highest precision for various industries.
Logistic
In order to be able to deliver quickly, we believe in long standing and reliable cooperation with local logistics partners.
Efficiency
Regular optimization in development, toolmaking and production is a continuous process for us and thus the foundation for high efficiency and customer satisfaction.
Local
Everything is local. We develop and produce plastic components - from the idea to production - one-stop. Our service enables short communication channels.