Injection Moulding Machine for Single-use Surgical Instrument Handles and Bodies
Single-use surgical instrument handles and bodies are made on horizontal injection moulding machines from PC, ABS, PP or PA, with soft TPE grips added by two-shot moulding. Part length and the grip material decide the clamping force and any second injection unit. Grip bond matters most, since both resins must stay joined after sterilisation.
For instrument handles, selection focuses on the two-material process, gates kept away from grip faces and resins that survive the chosen sterilisation dose. Pratishna Engineers builds special purpose injection moulding machines to application for two-shot handles, supplies horizontal machines for single-material bodies and can recommend a configuration.
Manufacturing Surgical Instrument Handles?
Share the handle drawing, resins and grip route, and Pratishna Engineers will recommend a machine.
Machine Requirements for Surgical Instrument Handle Moulding
A disposable instrument body pairs a rigid core with a soft grip and must come through sterilisation unchanged:
- Second injection unit and mould rotation for TPE grips
- Validated bond pairing between rigid core and TPE
- Resin grades that resist gamma or EtO discolouring
- Drying for PC and PA before each shot
- Platen length and stroke for long instrument bodies
- Gate and weld line placement away from pivot bosses
Recommended Machine for Surgical Instrument Handles
Two-shot handles with a bonded TPE grip need a machine built to application, and Pratishna Engineers builds Special Purpose Injection Moulding Machines for that work. Single-material bodies, trigger housings and separate grip parts can run on standard presses. Shorter parts fit the E Series (75-180 T), and C Series (140-320 T) and H Series (120-350 T) machines take long bodies and multi-cavity tools.
Not Sure Which Machine You Need?
Tell us whether the grip is two-shot or separate for a recommendation.
Why Choose Pratishna Engineers?
- Application-Based Machine Selection
- In-House Engineering & Manufacturing
- Multiple Machine Series
- Production-Focused Solutions
- End-to-End Technical Support
- Industry-Specific Solutions
- Machine Lifecycle Support
Injection Moulding Machine Buyer Resources
Download practical resources to help you select, size and specify the right machine.
Special Purpose Injection Moulding Machine Selection Guide
A step-by-step guide covering the key inputs needed to specify a machine built to application: component and process, product weight, projected area, number of cavities, plastic material, required clamping force, shot / injection capacity, mould dimensions, production quantity, cycle time and automation requirement.
Download PDFPDF · 265 KB
How to Calculate Clamping Force for an Injection Moulding Machine
A clear methodology that explains how clamping force is calculated, covering projected area, injection pressure, safety factor, number of cavities and material considerations.
Download PDFPDF · 363 KBMedical Sector Components & Machine Guide
A guide to Medical Sector components, covering syringes, IV set parts, luer fittings, connectors, pipette tips, petri dishes, test cassettes and device housings. It explains medical-grade materials, clean moulding area needs, dimensional control, and how to match each part to a suitable machine.
Download PDFPDF · 206 KB
FAQs / Buyer Questions
What disposable instrument makers ask before choosing a process.
Which Injection Moulding Machine Is Used to Make Single-use Surgical Instrument Handles?
Two-shot handles with a soft grip need a special purpose machine built to the application. Rigid bodies and single-material parts run on standard horizontal machines, the E Series for smaller parts and the C or H Series for long bodies.How Is the TPE Grip Joined to the Handle?
In a two-shot process the rigid core is moulded first, then the TPE is injected over it in a second station. The resin pair must bond, so grades are matched and the bond is tested before validation.Which Resins Survive Gamma or EtO Sterilisation?
That depends on the method and dose. Some grades embrittle or yellow under gamma, so the resin is chosen with its supplier’s sterilisation data. The TPE grip also needs its own skin-contact biocompatibility data.
Can the Grip Be a Separate Part Instead of Two-Shot?
Yes. A separate TPE sleeve can be moulded on a standard machine and assembled onto the rigid body. That avoids a two-shot tool but adds an assembly step and a fit to control.Can Pratishna Recommend a Machine for My Surgical Instrument Handle?
Yes. Share the handle drawings, rigid and grip resins, single or two-shot route, part weights, mould dimensions and annual volume, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Medical Device Parts Too?
Yes, subject to the mould. Standard series machines also run medical device housings, medical equipment parts, dental components and autoinjector components, each with its own tool.
Technical Disclaimer
Disclaimer: The information provided in this webpage is for general informational and educational purposes only. It is based on technical references and industry information available at the time of preparation and may be subject to change. It does not constitute engineering, technical, commercial or professional advice, nor does it constitute a quotation, specification, warranty or contractual commitment by Pratishna Engineers.
Actual injection moulding machine and process requirements vary according to the component design, material, mould, production volume, machine configuration and operating conditions. The information, examples, calculations and recommendations provided should be independently evaluated and verified for the specific application before making any equipment, process or production decision. Information obtained from third-party sources remains subject to the accuracy and limitations of those sources.
Limitation of Liability: Pratishna Engineers makes no representation or warranty, express or implied, regarding the completeness, accuracy or suitability of the information for any particular application. To the extent permitted by applicable law, Pratishna Engineers shall not be liable for any loss, damage, cost or consequence arising from reliance on or use of the information contained in this webpage. Final machine selection, configuration and application suitability should be confirmed with Pratishna Engineers based on complete and accurate project requirements.
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Planning a New Injection Moulding Project?
Share your component, material, mould and production target. Our engineering team will help you identify the right machine configuration.
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