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🔩 What are Auto Unscrew Moulds?

Auto unscrew moulds are specialized injection moulds designed to manufacture plastic components with internal or external threads such as caps, closures, bottle lids, and threaded connectors. Unlike conventional moulds that require manual unscrewing or secondary operations, auto unscrew moulds incorporate an automated mechanism that rotates the threaded core while the mould opens, allowing the finished part to be ejected without thread damage.

At Laxmi Micro Industries, we have been designing and manufacturing high-precision auto unscrew moulds since 1987. Our unscrewing moulds are engineered for high-speed production, zero-defect output, and extended tool life. Whether you need moulds for tamper-evident caps, pharmaceutical closures, or industrial threaded components, our expertise ensures perfect results every cycle.

⚙️ Our Unscrewing Mechanisms

  • Rack & Pinion Unscrewing - Mechanical unscrewing using rack and gear system. Cost-effective and reliable for standard applications.
  • Hydraulic Unscrewing - Hydraulic motor-driven unscrewing for larger threaded components and high-torque requirements.
  • Hydraulic + Rack Combination - Hybrid system for complex moulds with multiple unscrewing stations.
  • Pneumatic Unscrewing - Air-powered unscrewing for lightweight and small components.
  • Collapsible Core Technology - For components with undercuts and complex thread geometries.

Our engineers analyze your specific thread design, production volume, and machine compatibility to recommend the most efficient unscrewing mechanism for your application.

🏭 Industries & Applications We Serve

🥤

Beverage Industry

Carbonated soft drink caps, water bottle caps, juice closures

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Pharmaceutical

Child-resistant caps, prescription vial closures, medical device threads

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Personal Care

Shampoo caps, lotion pumps, cosmetic closures, deodorant caps

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Industrial

Pipe fittings, threaded connectors, chemical container caps, fuel caps

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Food & Edible Oil

Cooking oil caps, sauce bottles, condiment closures, jar lids

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Automotive

Radiator caps, fuel tank caps, fluid reservoir threads, hose connectors

✅ Key Features of Our Auto Unscrew Moulds

  • Precision Thread Forming - Accurate thread profiles with zero damage during ejection
  • High-Speed Cycling - Optimized unscrewing time for maximum productivity
  • Durable Components - Hardened steel gears, racks, and unscrewing cores
  • Wear-Resistant Coatings - TiN, TiCN, or DLC coatings for extended tool life
  • Easy Maintenance - Modular design for quick replacement of wear parts
  • Multi-Cavity Options - Up to 32+ cavities for high-volume production
  • Sensor Integration - Position sensors for unscrewing confirmation

🔧 Manufacturing Process at Laxmi Micro

Our auto unscrew moulds are manufactured using state-of-the-art infrastructure:

  • CAD/CAM Design - 3D modelling with unscrewing mechanism simulation
  • 5-Axis CNC Machining - For complex thread geometries and core components
  • Wire-Cut EDM - Precision profiling of unscrewing racks and gears
  • CMM Inspection - Ensuring thread pitch and dimensional accuracy
  • Mould Trial - Live testing on injection moulding machines before dispatch

Every auto unscrew mould undergoes rigorous testing to ensure smooth unscrewing action, proper thread formation, and consistent cycle times.

📊 Technical Specifications

Mould Base

Standard or custom mould bases as per customer requirement. Material: P20, H13, or S136 steel.

Unscrewing Stroke

Customizable based on thread length. Standard up to 50mm, extendable for longer threads.

Cavity Count

From 1 cavity to 32+ cavities depending on part size and machine tonnage.

Thread Types

Internal threads, external threads, multi-start threads, buttress threads, and custom profiles.

Cycle Time

Optimized unscrewing time as low as 1-3 seconds depending on thread length.

Compatibility

Compatible with all standard injection moulding machines (Windsor, Ferromatik, Milacron, etc.)

⭐ Why Choose Laxmi Micro Industries?

  • 35+ Years of Expertise - Founded in 1987 by Mr. Shantilal Panchal
  • 100% Precision Guarantee - Tolerances up to ±0.01mm
  • Quick Turnaround - 15-25 days for most auto unscrew moulds
  • Competitive Pricing - Direct factory pricing with no middlemen
  • After-Sales Support - Spare parts and technical assistance
  • Pan-India Delivery - Serving all major industrial cities

🎯 Common Threaded Products We Make Moulds For

  • Tamper-evident caps (TE caps)
  • Child-resistant (CR) caps
  • Push-pull caps and flip-top closures
  • Screw caps for water and beverage bottles
  • Pharmaceutical vial caps
  • Cosmetic jar threads and closures
  • Industrial pipe fittings and connectors
  • Chemical container caps and drums lids

❓ Frequently Asked Questions - Auto Unscrew Moulds

1. What is the difference between rack & pinion and hydraulic unscrewing?
Rack & pinion unscrewing is a mechanical system driven by the mould's opening force. It is cost-effective and reliable for standard applications. Hydraulic unscrewing uses a separate hydraulic motor, providing higher torque and independent control, ideal for larger threads and complex moulds.
2. What is the typical lead time for an auto unscrew mould?
Our standard lead time for auto unscrew moulds is 15-25 days from design approval, depending on cavity count and complexity.
3. Do you provide trial runs before dispatch?
Yes, every auto unscrew mould undergoes live trial runs on our injection moulding machines. We provide sample shots and a trial report before final dispatch.
4. What materials are used for unscrewing cores?
We use high-grade tool steel like H13, D2, or S136 with hardening and coatings (TiN, TiCN) for wear resistance and longer life.
5. Can you manufacture moulds for multi-start threads?
Absolutely. We have extensive experience in designing auto unscrew moulds for multi-start threads, including 2-start, 3-start, and 4-start configurations.