High-pressure injection moulding is the most common technique used to process thermoplastics

High-pressure injection moulding

In high-pressure injection moulding, plastic granulate (granules) is melted into a thick liquid, and then injected into a tempered mould at high pressure. High-pressure injection moulding is ideally suited to the production of large products of consistent quality, in large quantities.

High-pressure injection moulding

High-pressure injection moulding

High-pressure injection moulding is an ideal technique for producing large plastic components ranging from 250 grams to 25 kilograms in weight, commonly with wall thicknesses ranging from 2 mm to 4 mm. This is one of the types of injection moulding that HSV-TMP uses to manufacture great quantities of sustainable, large shaped plastic components, housings and products for you. Would you like to know more? Read on, or put your question directly to one of our employees. Call +31 318 648 991, or click the button below.

How does high-pressure injection moulding work?

HSV-TMP has subdivided the high-pressure injection moulding cycle into five phases. See below for more information about how high-pressure injection moulding works.

Injection moulding cycle figure 1: Phase 1 & 2 Plasticizing & dosing

During plasticising and dosing, thermoplastic granules – plus any additives that may be required – are mixed in the gravimetric dosing system. Next, the granules are transported into the machine.

The screw then pushes the granules (granulate) forward. The resulting friction causes the granulate to melt, creating a liquid mass.

Injection moulding cycle figure 2: Phase 3 Injection

This liquid mass is injected into the mould at high pressure. A great deal of force is needed to keep the mould closed, because the plastic is injected at high pressure.

Injection moulding cycle figure 3: Phase 4 Pressure & cooling

During pressure holding and cooling, the plastic takes on the shape of the mould. The mould and the shaped component are cooled. The production capacity of your reproducible shaped component is ultimately determined by the clamping force needed and by the injection volume.

Injection moulding cycle figure 4: Phase 4.1 Unloading & Release

Once the mould and the shaped component have cooled down sufficiently, the shaped component is unloaded and released. A robotic arm is used to extract the shaped plastic component from the mould. This is followed by any post-processing and assembly that may be required.

High-pressure injection moulding; Steel moulds & perfect supplementary details

HSV-TMP only uses heavy steel moulds for high-pressure injection moulding. Steel moulds are wear-resistant and can handle large production runs, even at higher pressure. At high pressure, the liquid plastic mass is pushed into even the tiniest detail of the mould. This ensures that your plastic components’ supplementary details will be perfect.

What are the advantages of high-pressure injection moulding?

The use of high-pressure injection moulding to create shaped plastic components, housings and products has several advantages. These include the following:

  • It is easy to add numerous details.
    The liquid plastic is injected into the mould at high pressure, which makes it possible to include numerous details in the design. With many other design techniques, this is more complex and often more expensive to achieve
  • High efficiency, injection moulding is a mechanical process, and is very rapid. Large numbers of items, of consistent quality, can be produced in short periods of time
  • Cost efficiency, injection moulding is a very cost efficient solution
  • High reproducibility and large numbers
  • Consistent shape
  • Attractive glossy surface, no additional finishing is needed
  • Wall thicknesses commonly ranging from 2 mm to 4 mm

Potential issues

There are a number of potential issues with regard to high-pressure injection moulding:

  • It is important to use the same wall thicknesses everywhere
  • With ribbed products, there is a risk of sinkage (distortion)
  • There may be deformation, due to internal stresses

Why opt for high-pressure injection moulding?

Contact one of HSV-TMP’s designers. Their know-how about plastics and the available injection moulding techniques is complemented by extensive experience in these areas. They are happy to advise you about whether high-pressure injection moulding is or is not the best technique for creating your sustainable, large shaped plastic component, housing or product. If another technique is better suited to the feasibility of your product design, they can provide a definitive answer on this matter.

What does high-pressure injection moulding cost?

HSV-TMP’s designers put their passion for plastics and their knowledge of this subject at your disposal. They would be happy to provide well-founded answers to any questions you may have concerning the cost of high-pressure injection moulding. Call +31 318 648 991 to contact one of our engineers directly or to request a plastic QuickScan and have the feasibility of your product design tested, without any obligations. You will receive an initial price estimate and indication for the realisation of your shaped plastic component, housing or product.

The plastic QuickScan tests the feasibility of your product design, and includes a mould flow simulation. Various factors are taken into account, including: 

  • Product specifications & quality requirements
  • Annual sales & numbers
  • Type of thermoplastic & any additives that may be required
  • Requisite mould dimensions
  • The injection moulding technique that is best suited to the desired end result

Based on these factors, we will also submit an initial estimate of the costs.

Injection moulding is the most commonly used technique

Injection moulding is the most common technique used to handle thermoplastic materials. HSV-TMP’s machines have clamping forces ranging from 300 tons to 4,000 tons, and injection volumes ranging from 1 litre to 33 litres. They enable us to create products ranging in weight from 250 grams to 25 kilograms. In addition to high-pressure injection moulding, HSV-TMP uses the following techniques to process thermoplastics:

Sustainability at HSV-TMP

HSV-TMP produces your shaped components in a sustainable way. We have sustainable production facilities. For example, we use solar power in the production of your sustainable shaped components. This green energy is generated by solar panels on the roofs of our production facilities in Ede and Leeuwarden.

We use energy efficient machines, heat exchangers, and passive cooling systems. Any customers who wish to do so can opt for recyclate, regranulate, and regrind, depending on the application.

HSV-TMP finds the most optimal solution for you, both in terms of minimising material use and optimising matrix investments, assembly and logistical solutions that will save you time and money. Would you like to know more about sustainability at HSV? Click on the button below to ask your question, or read more at this page.

Do you want to commission a sustainable plastic product? Request a plastic QuickScan, without any obligations. Assess the feasibility of your product and receive an initial price estimate. Your request will be kept confidential.

Your knowledge partner

From product development to the realisation of a shaped plastic component

HSV-TMP is more than a producer. We are your knowledge partner and we will handle everything on your behalf, from A to Z. HSV-TMP’s design team will advise you about your options, ranging from product development to the realisation of large, complex, and sustainable shaped plastic components.

Technical know-how & knowledge of plastics

Using our technical know-how and our knowledge of plastics and techniques, we help you to brainstorm new solutions. For example, while allowing for the total cost of ownership, we also seek opportunities to shorten your product’s time to market.

Solutions with added value

We are happy to help you brainstorm ideas that deliver solutions with added value for you. Would you like to know more? Call +31 318 648 991 and put your question directly to one of our designers, or click on the button below and request a plastic QuickScan.

Redesign and reduction of carbon footprint

There is also the option of a redesign from metal to plastic, or to further enhance your organisation’s sustainability and reduce its carbon footprint. HSV-TMP is the go-to place for large, sustainable and easily reproducible shaped plastic components, housings and products. These can even be up to 3.5 metres in size, and – subject to consultation – perhaps even bigger. For advice, call +31 318 648 991, or click the button below.

HSV-TMP’s focus on quality

At HSV-TMP, people with a passion for plastics will provide you with comprehensive guidance and advice. Our focus is the quality of your shaped plastic component.

Guidance when ordering moulds

In addition to technical know-how and a knowledge of plastic production techniques, we provide comprehensive guidance throughout the process of ordering a mould. This approach enables us to guarantee the quality of your shaped plastic component.

Durable moulds

HSV-TMP only works with toolmakers (mould makers) who create high-quality and durable moulds. This way you can be sure that your technical shaped component will meet your requirements, in terms of quality and specifications.

Produced with care

In our injection moulding facilities at the Ede and Leeuwarden (The Netherlands) production sites, we produce your shaped plastic component, housing or product with care.

Assembly & logistics process

HSV-TMP can even handle the assembly and logistics process for you. We help you to brainstorm new ideas, to deliver smart logistics solutions that will save you time and money. Call +31 318 648 991 for more information or click the button below to put your question directly to one of our designers.

Types of thermoplastics

Almost all types of thermoplastics and additives – such as materials that are reinforced with fibres, UV resistant, or fire-resistant – can be used in plastic injection moulding to create large shaped components, housings, and products. Read more about thermoplastics here.

Plastic Quickscan

Quick answer about the feasibility of your ideas

Request a Quickscan

About us: Introduction

Are you looking for a partner who can support you with the development of your plastic products due to practical experience? At HSV TMP we have decades of experience in the development of plastic components and a wealth of knowledge when it comes to the materials and techniques required.


Company profile

An increasing number of designers and purchasers are opting for plastic

HSV TMP is one of Europe’s leading companies when it comes to manufacturing large plastic products. At our factories in Ede and Leeuwarden we develop and produce innovative housings, fittings and other components for customers in a diverse range of sectors.

Company profile
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Our history and organisational structure

The history of HSV Technical Moulded Parts (HSV TMP) can be traced back to the foundation of our sister company, HSV Moulded Foams. This company – like HSV TMP now a separate division of the HSV Group – started manufacturing EPS packaging at a production location in Ede in 1968.


Core Values

How we do business

We are convinced that our customers not only work with us because of the products we supply, but also because of the way we do business. We have broken down this approach into 4 core values.

Core Values

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We think along with you

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