Plastic Injection Molding - From design to mass production
At MK Plastteknik, we offer plastic injection molding for industrial customers who require consistent quality, stable tolerances, and long-term production. With our in-house tooling expertise, experience with engineering polymers, and controlled processes, we produce injection-molded plastic components for demanding applications.
Injection molding is a mass production method in which every parameter affects the final result. The mold design, the polymer’s properties, and the set process parameters must be in balance for the part to meet its technical requirements. We take a structured approach throughout the entire process to ensure that production runs smoothly over the long term.
What is injection molding?
Injection molding is a manufacturing process in which plastic pellets are melted in a heated barrel and injected into a mold under controlled pressure. Once the material has filled the cavity, the process transitions to holding pressure and cooling before the part is ejected.
This method is used to manufacture plastic parts with high repeatability and good dimensional accuracy. The same tool can produce large volumes with consistent quality, provided that the design and process are properly established from the outset.
This technology makes it possible to integrate features directly into the component, such as ribs, snap-fit fasteners, and reinforcements. This reduces the need for post-processing and simplifies further assembly.
How we approach injection molding
1. Technical Review and Design Analysis
We begin every project with a review of the design. Geometry, wall thickness, material selection, parting lines, and ejection are analyzed before tools are ordered or manufactured. Early adjustments can reduce tooling costs and improve the flow within the mold.
2. Tool manufacturing and adjustment
We have in-house expertise in tooling and wire EDM. This gives us control over critical dimensions and allows us to make adjustments without external lead times.
After tool development, we conduct test runs and verify dimensions and tolerances, surface finish, cycle time, and material behavior.
3. Mass production
Once the mold is approved, mass production begins. Temperature, injection pressure, holding pressure, and cooling time are optimized to achieve a consistent cycle time and uniform quality. Documented settings are used consistently to ensure that parts from different batches meet the same standard.
4. Quality Assurance
Inspection methods are tailored to the part’s function and industry requirements. We conduct ongoing measurements and follow established inspection plans. If necessary, documentation and traceability can be adapted to the customer’s specifications.
Materials for plastic injection molding
The right choice of material affects strength, temperature resistance, chemical resistance, and service life. We work with both standard plastics and more advanced engineering polymers. We also handle materials with glass fiber reinforcement, mineral fillers, and flame retardants.
Common materials used in our injection molding process:
- Polypropylene (PP)
- Polyethylene (PE)
- ABS
- Polycarbonate (PC)
- Polyamide (PA)
- D
- TPU and TPE
- PEEK
Advantages of plastic injection molding
Injection molding is an efficient method for mass production when the design is finalized and production volumes are consistent. The initial investment in tooling is spread across the total production volume, resulting in a low unit cost when production is stable.
This method is suitable for parts with complex geometries and high repeatability requirements. Once the tools and process have been optimized, the same part can be produced in large volumes with consistent quality.
When is injection molding appropriate?
- The volumes are recurring
- The design is complete or nearly ready for production
- Tolerances and surface finishes are defined
- Long-term supply security is important
Injection-molded plastic parts for industrial applications
We manufacture injection-molded plastic parts for a variety of industries, including automotive components, electronic enclosures, construction-related plastic components, and custom-designed industrial parts.
We manufacture injection-molded plastic parts for a variety of industries, including automotive components, electronic enclosures, construction-related plastic components, and custom-designed industrial parts.
Injection molding capacity
Our injection molding is tailored for technical plastic components of various sizes and production volumes. By combining manufacturing with in-house tooling expertise and complementary machining, we can handle both startup and ongoing production within the same organization.
This provides better control over quality, lead time, and follow-up.
Injection molding in Kristinehamn with delivery throughout Sweden
We are based in Kristinehamn and supply injection-molded plastic parts to customers throughout Sweden. Are you looking for a plastic injection molding supplier who can handle both tooling and mass production? Contact us, and we’ll review your requirements for materials, volume, and functionality to develop a solution that works for the long term.