--- title: "Plastic injection moulding factory | H&K Müller" url: "https://www.hk-mueller.de/en/plastic-injection-moulding/" description: "As a manufacturer of high-precision injection molded parts, H&K Müller has more than 85 years of experience in plastic injection molding. In-house toolshop." author: "H&K Müller GmbH & Co. KG" date: 2022-05-16 modified: 2024-03-20 lastUpdated: 2024-03-20 --- # Plastic injection moulding factory | H&K Müller 1. [Home](https://www.hk-mueller.de/en/) 2. Company 3. Plastic injection moulding PLASTIC INJECTION MOULDING FROM H&K MÜLLER ============================================== PRECISE AND HIGH-QUALITY INJECTION MOULDED PARTS FOR EVERY INDUSTRY Plastic injection moulding is a widely used process in plastics processing and enables the efficient production of high-precision articles, components as well as parts in large quantities. The production of parts using plastic injection moulding is a complex process that requires high precision and expertise. H&K Müller has been present on the market as a plastic **injection molding factory** since 1934 and thus has **more than 85 years of experience in plastic injection moulding**. Benefit from our own [design department](https://www.hk-mueller.de/en/what-we-do/#c2940 "design department for plastic injection moulding") as well as our [in-house tool shop](https://www.hk-mueller.de/en/what-we-do/#c2944 "tool shop for injection moulding moulds") for injection moulding tools. All **injection moulded parts** are manufactured in our quadruple certified [production facility in Engelskirchen](https://www.hk-mueller.de/en/company/about-us/ "injection moulding factory HK Mueller"), Germany, according to [ISCC Plus](https://www.hk-mueller.de/en/iscc-plus-certified-plastic-packaging/ "ISCC Plus certified injection moulding factory"), [ISO 9001 quality management](https://www.hk-mueller.de/en/company/quality-assurance-and-certificates/#c3398 "ISO 9001 certified injection moulding factory"), [ISO 22000 food safety](https://www.hk-mueller.de/en/company/quality-assurance-and-certificates/#c3399 "ISO 22000 food safety certified injection moulding factory") and [ISO 50001 energy management](https://www.hk-mueller.de/en/company/quality-assurance-and-certificates/#c3400 "ISO 50001 certified injection moulding factory") and are "Made in Germany". How does the injection moulding of plastic work? ------------------------------------------------ THE INJECTION MOULDING OF THERMOPLASTIC **Injection moulding** of plastic is a primary moulding process. With the help of an **injection moulding machine**, granular plastic raw material is melted and liquefied. This process takes place inside a closed cylinder, in which a screw conveyor ensures plasticizing of the plastic by means of friction with the support of external heat. After the plastic has been melted, it is injected at high pressure into a mould, also called an injection mould. The shape and surface structure of the manufactured injection moulded parts are determined by a cavity in the injection mold, which is called a cavity. The plastic material injected into the tool cools down in the cavity and returns to a solid state. The injection mold can then be opened and the finished **injection moulded part** removed. ![injection mouldin factory since 1934 H&K Müller ](https://www.hk-mueller.de/fileadmin/_processed_/4/a/csm_csm_kunststoffgranulat_materialvielfalt_spritzguss_f839291dea_d326b1586f.jpg "plastic injection molding factory") H&K Müller is an injection moulding company since 1934 ![injection moulded parts ](https://www.hk-mueller.de/fileadmin/_processed_/5/7/csm_csm_kunststoff_spritzgussteil_produktion_h_k_mueller_d20db2d6a3_93c8694d18.jpg "plastic injection moulded parts") The production of injection moulded parts at H&K Müllers injection moulding plant in Engelskirchen Injection moulding process -------------------------- The injection moulding process, also called injection moulding or injection moulding, essentially consists of five individual steps: | **1. plasticising by heating:** The plastic granulate is melted by friction and heat. | |---| | **2. injection:** The molten plastic is injected into the closed mould under high pressure. | | **3. holding pressure phase:** In order to counteract the shrinkage of the cooling plastic, plastic is pressed further into the mould after the volumetric mould filling. | | **4. cooling phase:** The injection mould is cooled from the inside with water to cool down the plastic and thus make the injection moulded part dimensionally stable. | | **5. demoulding:** The mould is opened and the finished plastic part is removed. | ![arburg injection moulding machine at H&K Müller](https://www.hk-mueller.de/fileadmin/_processed_/3/7/csm_csm_kunststoffspritzguss_maschine_bei_hersteller_h_k_mueller_4aa5c5b30f_1e853ad237.jpg "plastic injection moulding machine at H&K Müller") a injection moulding machine from arburg which is used at H&K Müller injection moulding company The structure and components of an injection moulding machine ------------------------------------------------------------- ### How does an injection moulding machine work? H&K Müller has a total of 55 injection moulding machines from the manufacturer "Arburg". The injection moulding machines essentially consist of **two subassemblies**. On the one hand, there is the **clamping unit**, in which the injection moulds are clamped and opened and closed during the production process. The other is the **plasticising unit**, also known as the **injection unit**, in which the plastic raw material is melted in a screw cylinder before it is subsequently injected into the injection mould at high pressure. Both assemblies are mounted on a machine stand. Depending on the application, further peripheral devices, such as removal robots or conveyor belts, can be mounted on this stand. Which material is suitable for injection moulding? -------------------------------------------------- Three types of plastics can be processed in injection moulding: T**hermoplastics, thermosets and elastomers**. The most widely used process in plastics processing is t**hermoplastic injection moulding**. **Thermoplastics:** Thermoplastics are the most commonly used materials in injection moulding. They become soft and malleable when heated and solidify again when cooled. Examples of thermoplastics are polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC) and polycarbonate (PC). **Thermosets:** Thermosets are plastics that undergo an irreversible chemical reaction when heated and take on a solid, non-meltable structure. They are characterised by their hardness, rigidity and heat resistance. Examples of thermosets are phenolic resins, epoxy resins and melamine resins. **Elastomers:** Elastomers are rubber-like materials with high elasticity and flexibility. After deformation, they return to their original shape. Elastomers are often used to make seals, damping elements and flexible components. Examples of elastomers are rubber (natural rubber) and synthetic elastomers such as styrene-butadiene rubber (SBR), ethylene-propylene-diene rubber (EPDM) and silicone rubber. ![Injection moulding machine with robotic handling](https://www.hk-mueller.de/fileadmin/_processed_/5/d/csm_Spritzgussmaschine_mit_Roboterhandling_43f3252a3b.jpg "A robot picks parts from an injection moulding machine") A picking robot is used in an injection moulding machine ![Robotic handling of injection moulded parts](https://www.hk-mueller.de/fileadmin/_processed_/7/f/csm_Kunststoffspritzguss_Teileablage_95e94dd1ae.jpg "Injection moulding machine with handling") A robot places injection moulded parts on the belt of an injection moulding machine ![Adjustment procedure for the injection moulding machine](https://www.hk-mueller.de/fileadmin/_processed_/9/a/csm_Spritzgussmaschine_Ruestvorgang_5022df1c50.jpg "Injection moulding machine preparation process") The plastic injection moulding machine is prepared. ![Removal of items from the plastic injection moulding machine](https://www.hk-mueller.de/fileadmin/_processed_/3/6/csm_Spritzguss_Automation_f5b68ab07e.jpg "An injection moulding machine makes plastic boxes") A robot picks up plastic boxes from an injection moulding machine and stacks them on a conveyor belt. Advantages and disadvantages of injection moulding -------------------------------------------------- ### Advantages | High-precision components can be produced | |---| | Different wall thicknesses can be realized | | Large quantities can be produced in a short time | | High reproducibility and constant process parameters | | Parts price decreases with increasing production lot size | ### Disadvantages | Invest in injection mould before the first fully functional serial part | |---| | In order to realise changes to the component, adjustments to the tool are necessary | ![sustainable plastic injection moulding factory H&k Müller](https://www.hk-mueller.de/fileadmin/_processed_/c/f/csm_csm_kunststoff_spritzugss_hersteller_h_k_mueller_4a5dff3195_14027a419c.jpg "sustainable injection moulding manufacturer H&K Müller") H&K Müller is a sustainable injection moulding company. Sustainable and resource-saving plastic injection molding --------------------------------------------------------- The topics of sustainability and environmental protection are more relevant and topical than ever in the field of plastic injection molding. Sustainable, environmentally conscious and resource-saving action has been an essential part of H&K Müller's corporate policy and philosophy for many years. Thus, during the construction of the new company site in 2009, a special focus was placed on the topics of energy and raw material efficiency. [LEARN MORE](https://www.hk-mueller.de/en/company/sustainability-and-environmental-protection/ "sustainable plastic injection moulding") ![injection molded parts from recycled plastics](https://www.hk-mueller.de/fileadmin/_processed_/d/2/csm_csm_recycling-kunststoff-spritzgussteil_rezyklat_423b18a14e_ab928a7b45.jpg "injection moulded parts from recycled plastic") H&K Müller injection moulding company can produces all of its products from recycled plastics Injection molded parts from recycled plastics --------------------------------------------- REUSE INSTEAD OF DISCARDING No matter whether "post-industrial" or "post-consumer", plastic waste does not have to be incinerated. They can be recycled and reprocessed into injection molded parts. For many years H&K Müller has been producing precise and high-quality **injection molded parts from recycled plastic** for a wide range of applications. For many years, H&K Müller has been intensively researching the processing of recycled plastic by injection moulding, in close cooperation with leading manufacturers of recycled plastic. [INJECTION MOLDED PARTS FROM RECYCLED PLASTICS](https://www.hk-mueller.de/en/company/recycled-and-organic-plastics/#c3122 "injection moulded parts from recycled plastics") Injection moulded parts from H&K Müller ------------------------------------------- OUR SERVICES AS PLASTIC INJECTION MOULDING MANUFACTURER H&K Müller is a **full-service provider** in the field of plastic injection moulding. Our own design and **[development department](https://www.hk-mueller.de/en/what-we-do/#c2291 "development department")** develops all **[injection moulded parts](https://www.hk-mueller.de/en/products/technical-plastic-injection-moulded-parts/ "injection moulded parts")** in close cooperation with the respective customers. After the finished injection moulded part has been presented to the customer by means of a stereolithography sample and approved by the customer, an injection mould is built in H&K Müller's in-house **[tool shop](https://www.hk-mueller.de/en/what-we-do/#c2293 "tool shop")**. Since almost all activities necessary for the construction of the injection moulding tools are carried out by the tool shop of H&K Müller, **short delivery times** can be realized and flexible reactions to customer requirements can be achieved. The 55 injection moulding machines in the **[injection moulding production](https://www.hk-mueller.de/en/what-we-do/#c2295 "injection moulding production")** of H&K Müller cover a clamping force range from 50 t to 220 t and are mostly equipped with peripheral devices and removal robots. In addition to pure injection moulding, H&K Müller offers its customers various options for **[product refinement and decoration](https://www.hk-mueller.de/en/what-we-do/#c2298 "product refinement and decoration")**. In addition to our own **[screen and embossing printing](https://www.hk-mueller.de/en/what-we-do/#c2299 "screen and embossing printing")**, offset printing and metallization can also be realized upon customer request. Thanks to large storage areas and a sophisticated logistics system, **[individual delivery concepts](https://www.hk-mueller.de/en/what-we-do/#c2302 "individual delivery concepts")** can be implemented, which are specially tailored to the needs of each customer. [THE SERVICES OF H&K MÜLLER](https://www.hk-mueller.de/en/what-we-do/ "H&K Müller plastic injection moulding services") [ ![injection molding toolshop at H&k Müller](https://www.hk-mueller.de/fileadmin/_processed_/8/a/csm_csm_werkzeugbau_spritzgusswerkzeug_bei_h_k_mueller_56671bb8e0_3c6db11dd3.jpg "tool shop for injection moulding tools at H&k Müller") H&K Müller plastic injection moulding company has an own tool shop for injection moulding tools ](https://www.hk-mueller.de/fileadmin/Bilder/Ueber_uns/Kunststoffspritzguss/csm_werkzeugbau_spritzgusswerkzeug_bei_h_k_mueller_56671bb8e0.jpg "H&K Müller plastic injection moulding company has an own tool shop for injection moulding tools") [ ![Production of injection moulding parts at H&k Müller](https://www.hk-mueller.de/fileadmin/_processed_/1/c/csm_Kunststoffspritzguss_Fertigung_905046b82a.jpg "injection molding production at H&K Müller") H&K Müller ist an injection molding manufacturer ](https://www.hk-mueller.de/fileadmin/_processed_/1/c/csm_Kunststoffspritzguss_Fertigung_6b39e3b93a.jpg "H&K Müller ist an injection molding manufacturer") [ ![screen printing decoration for injection moulded parts](https://www.hk-mueller.de/fileadmin/_processed_/2/8/csm_csm_siebdruck-fuer-spritzgussteile_da4b4e1ba8_28cfe763e5.jpg "screen printing for injection moulded parts at H&k Müller") injection moulded parts from H&K Müller can be decorated with an individual screen printing ](https://www.hk-mueller.de/fileadmin/Bilder/Ueber_uns/Kunststoffspritzguss/csm_siebdruck-fuer-spritzgussteile_da4b4e1ba8.jpg "injection moulded parts from H&K Müller can be decorated with an individual screen printing") [ ![injection moulding company H&K Müller with an modern logistics management](https://www.hk-mueller.de/fileadmin/_processed_/0/d/csm__hochregallager._kunststoffspritzgusswerk_e6fb49440e.jpg "modern logistic management at H&K Müller") The plastic injection moulding company H&K Müller has an modern logistic management. ](https://www.hk-mueller.de/fileadmin/Bilder/Ueber_uns/Kunststoffspritzguss/_hochregallager._kunststoffspritzgusswerk.jpg "The plastic injection moulding company H&K Müller has an modern logistic management.") Reference products ------------------ INJECTION MOULDED PARTS FROM H&K MÜLLER ![Plastic injection moulded parts Medical technology](https://www.hk-mueller.de/fileadmin/_processed_/1/b/csm_csm_kunststoff_spritzgussteile_fuer_medizintechnik_hersteller_h_k_mueller_be8c4e33c2.png "H&K Müller is a manufacturer of injection moulded parts in the field of medical technology") Injection moulded plastic parts for the medical technology sector Medical technology [Discover](https://www.hk-mueller.de/en/industries/dental-and-medical-technology/ "Spritzgussteile Medizintechnik") ![Injection moulded parts technical industry](https://www.hk-mueller.de/fileadmin/_processed_/4/e/csm_csm_kunststoff_spritzgiessteile_technische_industrie_hersteller_h_k_mueller_3f5c2d54b9.png "Plastic injection moulded parts for the technical industry") H&K Müller is a manufacturer of technical plastic injection moulded parts technical injection moulded parts [Discover](https://www.hk-mueller.de/en/industries/technology/ "Technische Spritzgussteile") ![Pharmaceutical injection moulding](https://www.hk-mueller.de/fileadmin/_processed_/c/b/csm_csm_kunststoffspritzguss-verpackung-pharmazie_hersteller_h_k_mueller_c501801614.png "Plastic injection moulding for the pharmaceutical industry") Injection moulding for the pharmaceutical industry from H&K Müller pharmaceutical packaging [Discover](https://www.hk-mueller.de/en/industries/pharmacy/) ![Injection moulded part for medical technology ](https://www.hk-mueller.de/fileadmin/_processed_/d/a/csm_csm_spritzgussteil-medizintechnik_6ddc645d5f.png "Plastic injection moulded parts for medical technology") Plastic injection moulding for medical technology dental technology [Discover](https://www.hk-mueller.de/en/industries/dental-and-medical-technology/ "Spritzguss Dentaltechnik") ![Plastic injection moulded part for medical technology](https://www.hk-mueller.de/fileadmin/_processed_/5/2/csm_individuelle_kunststoff_spritzguss_verpackungen_hersteller_bfeb15a020.png "Injection moulded part for medical technology") Customised injection moulded part for medical technology medical technology [Discover](https://www.hk-mueller.de/en/industries/dental-and-medical-technology/ "Spritzguss Medizintechnik") Contact form ------------ CONTACT H&K MÜLLER Our references ---------------- [ ![Logo 3M](https://www.hk-mueller.de/fileadmin/Bilder/Logos/3m.svg "Referenzlogo 3M") ](https://www.3mdeutschland.de/ "Link 3m") [ ![Logo BASF](https://www.hk-mueller.de/fileadmin/Bilder/Logos/basf.png "Referenzlogo BASF") ](https://www.basf.com/global/de.html "Referenzlink BASF") ![Logo Bayer](https://www.hk-mueller.de/fileadmin/Bilder/Logos/bayer.png "Referenzlogo Bayer") [ ![Logo Beiersdorf](https://www.hk-mueller.de/fileadmin/Bilder/Logos/beiersdorf.png "Referenzlogo Beiersdorf") ](https://www.beiersdorf.de/ "Referenzlink Beiersdorf") [ ![Logo Boehringer Ingelheim](https://www.hk-mueller.de/fileadmin/Bilder/Logos/boehringer_ingelheim_logo.png "Referenzlogo Boehringer Ingelheim") ](https://www.boehringer-ingelheim.de/ "Referenzlink Boehringer Ingelheim") [ ![Logo Clariant](https://www.hk-mueller.de/fileadmin/Bilder/Logos/clariant.png "Referenzlogo Clariant") ](https://www.clariant.com/de/Corporate "Referenzlink CLARIANT") [ ![Logo Coty](https://www.hk-mueller.de/fileadmin/Bilder/Logos/coty.png "Referenzlogo Coty") ](https://www.coty.com/ "Referenzlink COTY") [ ![Logo Dentsply](https://www.hk-mueller.de/fileadmin/Bilder/Logos/dentsply.png "Referenzlogo Dentsply") ](https://www.dentsplysirona.com/de-de "Referenzlink DENTYPLY") [ ![Logo Faber-Castell](https://www.hk-mueller.de/fileadmin/Bilder/Logos/faber-castell.png "Referenzlogo Faber-Castell") ](https://www.faber-castell.de/ "Referenzlink FABER CASTELL") ![Logo Fresenius Kabi](https://www.hk-mueller.de/fileadmin/Bilder/Logos/fresenius.svg "Referenzlogo Fresenius Kabi") [ ![Logo Fujifilm](https://www.hk-mueller.de/fileadmin/Bilder/Logos/fujifilm.png "Referenzlogo Fujifilm") 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"Referenzlogo Wella") ](https://www.wella.com/professional/de-DE/home "Referenzlink Wella") [ ![ZF Logo](https://www.hk-mueller.de/fileadmin/Bilder/Logos/ZF_Logo.svg "ZF Logo") ](https://www.zf.com "Link ZF") Finding an apprenticeship - Frequently Asked Questions(FAQ)