Medical Tube Extrusion Screw Barrel With Coating Process

Screw diameter: 45mm-65mm
Base Materials: SACM645,SCM440,SKD61, SUS304, SUS316...
Treatment: Nitrided & Bimetallic
Hardness: HRC55-HRC70
Delivery time: 15 days

Product Description:

Precision Screw & Barrel Solutions for Medical Tubing Extrusion

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Medical tubing extrusion requires precise control of melt pressure, plasticization, temperature and output stability. Compared with general plastic extrusion, medical tube production places greater emphasis on dimensional consistency, low shear processing, clean material flow and repeatable extrusion performance.

Tokin Industry manufactures customized medical tubing extrusion screws and barrels for TPU, PVC, PE, PP, TPE, Pebax, PA12 and other thermoplastic materials.

Our medical extrusion screws can be designed according to the polymer, machine configuration, tubing dimensions, output requirements and processing conditions.

Medical Tubing Extrusion Applications

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Our precision screw and barrel solutions are suitable for a wide range of medical extrusion applications, including:

Medical Tubing
Medical Catheters
IV and Infusion Tubing
Blood Tubing
Dialysis Tubing
Respiratory Tubing
Oxygen Tubing
Feeding Tubes
Drainage Tubes
Suction Tubes
Micro Medical Tubing
Multi-Lumen Tubing
Multilayer Medical Tubing
Balloon Catheter Tubing
Medical Wire Coating
Pharmaceutical Tubing

For specialized applications, Tokin can develop customized screw geometry based on the material and extrusion process.

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Common Screw Materials

Screw Material	Typical Use	Common Treatment	Typical Applications
38CrMoAlA / SACM645	★★★★★	Nitriding	PE, PP, ABS, PVC and general plastics
40Cr / 42CrMo	★★★★	Quenching & tempering / nitriding	General injection molding and extrusion
D2	★★★	Through hardening	High-wear and glass-fiber-filled plastics
DC53	★★★	Through hardening	High-wear and GF-reinforced plastics
M2	★★	Through hardening	High-wear and high-hardness applications
17-4PH / SUS630	★★★	Aging / precipitation hardening	Applications requiring corrosion resistance and high strength
SUS304	★★	Polishing / surface treatment	Food, medical and corrosion-sensitive applications
SUS316 / 316L	★★–★★★	Polishing / surface treatment	Medical, food, pharmaceutical and high-cleanliness applications

Medical Tubing Extrusion Screw Design

A typical medical tubing extrusion screw uses a controlled single-screw configuration consisting of:

Feed Section → Compression / Melting Section → Metering Section → Optional Gentle Mixing Section

Unlike high-output compounding applications, medical tubing extrusion generally does not require aggressive mixing. The screw should provide efficient and uniform melting while controlling shear and material residence time.

Key design objectives include:

Stable feeding
Controlled melting
Uniform plasticization
Low-shear processing
Stable melt pressure
Consistent extrusion output
Reduced material residence time
Precise metering

Tokin can customize the feed, compression, barrier and metering sections according to the characteristics of the polymer.

Medical Extrusion Screw L/D Ratio

Medical tubing extrusion screws commonly use an L/D ratio in the range of approximately 24:1 to 30:1, depending on the material, machine and application.

Typical configurations include:

Application	Typical L/D
General Medical Tubing	24:1–25:1
TPU Tubing	25:1–28:1
PVC Medical Tubing	24:1–26:1
PE / PP Tubing	24:1–26:1
Pebax / PA12	25:1–30:1
Micro Tubing	25:1–30:1
Precision Catheter Extrusion	25:1–30:1

25:1 and 28:1 are practical configurations for many precision medical tubing applications, while the final screw design should be determined by the resin, tubing specification and extrusion equipment.

Medical Extrusion Barrel

A precision barrel is equally important for maintaining stable medical tubing extrusion.

Tokin manufactures customized medical extrusion barrels with options including:

Nitrided Barrels
Hardened Barrels
Chrome-Plated Barrels
Bimetallic Barrels
Precision-Honed Barrels

Barrel specifications can be customized according to:

Screw diameter
L/D ratio
Polymer
Extrusion output
Processing temperature
Machine model
Wear and corrosion requirements

For low-wear polymers, a precision alloy-steel barrel may be sufficient. More demanding materials and applications can be considered for enhanced surface treatments or bimetallic construction.

FAQS：(Easy and Fast One-Stop Solutions)

Q: When will you arrange the production?
A: We can arrange production soon after order & drawings confirmation

Q: What is your delivery time ?
A: Standard delivery time is 20-25 days, if the screw's diameter is less than 50mm, the delivery time can be 15-20 days

Q: What is your accepted payment type?
A: T/T

Q: What logistic forwarder do you usually work with?
A: EMS, TNT, UPS, FEDEX and other high-efficient logistric forwarders

Q: What is your warranty Time ?
A: 12 months when shipment on board