Injection Moulding Machine for Toothbrush Handles
Toothbrush handles with a soft grip are made on two-shot injection moulding machines in multi-cavity moulds, with a PP, SAN or ABS body and a TPE grip. Cavity count, handle length and each material’s shot weight set machine size. The TPE grade must match the body resin so the grip bonds.
Machine selection for toothbrush handles centres on the two-shot process, tuft-hole quality and warp control on a long, thin part. Pratishna Engineers builds special purpose injection moulding machines to application for two-shot handles, supplies horizontal machines for single-material handles and can recommend a configuration.
Moulding Toothbrush Handles?
Share the handle drawing, both materials and cavity count, and Pratishna Engineers will advise on a two-shot or single-material machine.
Machine Requirements for Toothbrush Handle Moulding
Every toothbrush handle goes straight to a tufting machine and then into the mouth, so the moulding leaves little room for error:
- Second injection unit for the TPE grip shot
- Rotary or index-plate mould movement between shots
- TPE grade matched to the PP, SAN or ABS body
- Round, burr-free tuft holes for the tufting machine
- Balanced flow to stop warp along the thin handle
- Quick, clean colour changes for multi-colour handle ranges
Recommended Machine for Toothbrush Handles
Two-shot handles need a second injection unit and a rotary or index-plate tool, so they come under Special Purpose machines built to application. Single-material handles, and rigid bodies that get their grip in a second mould, run on the E Series (75-180 T). High-cavity handle moulds go on the H Series (120-350 T) or C Series (140-320 T).
Not Sure Which Machine You Need?
Say whether the grip is two-shot or separate, and share the cavity count.
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 KBCosmetics & Personal Care Components & Machine Guide
A guide to Cosmetics & Personal Care components, covering compacts, lipstick cases, cream jars, caps, pumps, combs, brushes and hair accessories. It explains cosmetic surface finish, thick-wall clear parts, precise mating components, and how to match each part to a suitable machine.
Download PDFPDF · 203 KB
FAQs / Buyer Questions
Common questions from toothbrush makers setting up handle moulding.
Which Injection Moulding Machine Is Used to Make Toothbrush Handles?
It depends on the handle. Two-shot handles with a soft grip need a special purpose machine built around that tool. Single-material handles run on a standard horizontal machine, usually the E Series, or the C or H Series for high-cavity moulds.Why Does the TPE Grip Peel Off the Handle?
The grip relies on a chemical bond with the body resin, so the TPE must be a grade made to bond with that substrate. A cold body at the second shot, or mould release spray left on the substrate, also weakens the bond.What Keeps Tuft Holes Ready for the Tufting Machine?
Tuft holes are formed by fine core pins in the head. Pins have to stay straight, vented and unworn so the holes come out round, with no flash or burr that would block the tuft or cut the filament.
How Is Warp Controlled on a Long, Thin Handle?
Gate position and even cooling along the length keep the handle straight. Uneven wall sections, or ejection while the handle is still soft, will bend it, and a bent handle does not seat properly in the tufting fixture.Can Pratishna Recommend a Machine for My Toothbrush Handle?
Yes. Share the handle drawing or sample, body and grip materials, part weight, mould dimensions, number of cavities and production target, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Personal Care Parts Too?
Yes. Related machines can mould hair brush bases, makeup brush handles, toothbrush holders and comb bodies, with the two-shot or single-material choice made for each mould.
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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