Analyzing Injection Moulding Screw Barrel Manufacturer Specifications

Injection Moulding Screw Barrel Specifications Overview

Injection moulding screw barrels form the core of plastic processing machines. Their details affect melt evenness and cycle speed. Manufacturer details give clear facts on screw shape, materials, heat treatment, and fit limits. This helps engineers and buyers judge how well the parts work. By knowing these details, purchase teams and work groups can pick parts that cut stop times, lengthen the use period, and boost workflow in injection moulding tasks.

Details go beyond figures on a sheet. They show the maker’s build knowledge, material skills, and check methods. In areas with more rivals and a need for good plastics, spotting key points in screw barrel details helps firms gain an advantage.

Size Parameters and Dimensional Tolerances of Screw Barrels

Size details build the base for screw barrel work in injection moulding. Screw width, barrel hole size, and L/D ratio affect melt evenness, output amount, and power use.

Screw Diameter and Barrel Inner Diameter

The screw width needs to fit the barrel’s inside width just right. This stops leaks and rubbing. Usual widths for injection moulding screws go from Φ14 mm to Φ250 mm. Fit limits stay within 0.02 mm. This closeness gives a firm fit, steady push, and the same shot mass.

Length-to-Diameter (L/D) Ratio

The L/D ratio sets the stay time and rub effect in the barrel. For basic plastics, a ratio from 20:1 to 24:1 works as usual. Engineering plastics might need higher ratios to 30:1. This aids better mixing and softening.

Compression Ratio and Screw Geometry

The compression ratio means the ratio of flight depth in the feed area to the metering area. It sets the work. Ratios from 2:1 to 3:1 suit common plastics like PP and PE. Special shapes, like barrier or pin screws, fit when handling filled stuff.

Tolerances and Concentricity

Size limits guard machine steadiness. Field marks include:

These limits matter for stopping resin leaks, lengthening part life, and getting even run.

Material, Heat Treatment, and Coatings for Durable Injection Screw Barrels

Material pick and heat treatment steps set the length and strength of screw barrels in hot, high-pressure spots.

Base Steel Materials

Makers often pick mixed steels like 38CrMoAlA, 42CrMo, and SKD61 for good strength and heat hold. CHUANGRI SCREW also uses strong steels like AISI 4140 and H13. These suits run long runs with rough resins.

Heat Treatment Processes

Nitriding, quenching, and tempering serve as usual steps for injection moulding screws. Gas nitriding makes a hard layer of 0.5–0.8 mm with top hardness to HV900–1000. This boosts the rub hold and cuts plastic stick. It helps most with glass-fiber-added mixes.

Surface Coatings and Plating

For hard rub or rust spots, top coatings matter a lot. CHUANGRI SCREW uses:

1. Chrome plating (10–50 μm): Boosts stick hold and top smoothness.

2. Bimetallic alloy lining (2–5 mm): Gives better hold against rust fillers. It lengthens barrel life by over 30%.

3. Solid carbide coatings: Made for stuff with up to 75% glass fiber.

Hardness and Durability

Top hardness over HRC 58–62 keeps the screw and barrel from bending. With mixed covers, the setup holds rough fillers like calcium carbonate or fire-stop adds. This gives steady output even in tough tasks.

Manufacturer Performance Specs: Shot Weight, Clamping Force, Cycle Time, Etc.

Past size and materials, work details tell how a screw barrel acts in real run spots.

Shot Weight and Clamping Force

Maker facts often tie screw width to planned shot mass and clamp push. For example, a Φ50 mm screw can give a shot mass of 4000–10,000 g. Clamp push needs to go to 6000 tons. These facts aid engineers in matching machine power with moulding needs.

Cycle Time and Melt Homogeneity

Shorter cycle times come from even melt and good rub. A good barrel makes sure the melt heat spreads well. This cuts dark spots, burns, or unsoft granules. In fields like cars and electronics, this care is key.

OEM and Customization Options

Top makers give change to fit screws and barrels to machine names and set resins. Details can hold:

1. Screw length to 8000 mm without joins.

2. Set compression ratios for ABS, PC, PET, or PA stuff.

3. Bimetallic barrels for high-calcium or glass-fiber-filled mixes.

CHUANGRI SCREW– Product Specifications and Advantages

At CHUANGRI SCREW, we build and make injection moulding screws and barrels that show years of building new ideas and developing skills. Our goods follow world marks and fit the buyer’s work.

Injection Moulding Screw and Barrel Range

We make screws from Φ14 mm to Φ250 mm in width. L/D ratios go from 7:1 to 55:1. Our injection moulding barrels reach 8000 mm long. This gives high steadiness without joins. All parts get CNC cut to fit marks. This makes sure the right fit and line up.

Material and Heat Treatment Standards

We pick mixes like 38CrMoAlA, AISI 4140, SKD61, and H13. These fit different work needs. Heat steps hold nitriding and quenching. They hit a hardness of HV900–1000 and a nitriding depth of 0.5–0.8 mm. These details give long rub hold and even run over long make cycles.

Advanced Processing Technology

Our make spots use CNC lathes, thread mill, fine grind, and HVOF tungsten carbide coating. With chrome plate and bimetallic mix, our screws and barrels hold rough fillers and rust means. They keep a smooth plastic flow.

Product Advantages

1. Injection Moulding Barrel (Φ14–Φ250 mm, HV900+ surface hardness): Gives sure softening with good hold.

2. Nitrided Injection Moulding Screw: Set for common plastics like PP, PE, and ABS. It has low resistance and a long lifespan.

3. Bimetallic Injection Moulding Screw: Made for glass-fiber-added resins. It lengthens the use life by 30%+ and cuts change costs.

Each of these goods shows our work to give details that fit the buyer’s needs. This makes sure good, steady, and gain moulding tasks.

Global Supply and OEM/ODM Services

With over 500 world buyers and more than 4600 tasks done, CHUANGRI SCREW aids spots in 30+ locations. Our OEM and ODM work lets us build screws and barrels that match any injection moulding machine name or resin mix. We back fast orders with quick turnaround. We ship from the Ningbo and Shanghai ports. This makes sure buyers worldwide get trust and on-time goods.

As the plastics field looks to events like Manufacturing World Osaka 2025, the need for high-detail injection moulding parts will rise. We stand ready to meet these change needs with strong build and buyer-first fixes.

FAQ

Q: Which brand of injection moulding screw barrel is known for reliable specifications?

A: CHUANGRI SCREW stands out for barrels with the right widths, high hardness (HV900–1000), and strong coats. These details give long-lasting use and even work.

Q: How can buyers choose the right injection moulding screw barrel specifications?

A: Buyers need to watch screw width, L/D ratio, compression ratio, and top hardness. For rough resins, pick barrels with bimetallic liners from CHUANGRI SCREW.

Q: What is the difference between nitrided and bimetallic injection moulding screws?

A: Nitrided screws give a cheap, rough hold for basic plastics. Bimetallic screws from CHUANGRI SCREW hold mix coats. They stand glass-fiber-filled resins and lengthen life by over 30%.

Q: How do CHUANGRI SCREW specifications compare to standard injection moulding barrels?

A: Basic barrels meet simple fit limits. But CHUANGRI SCREW gives strong care, deeper nitriding, and CNC cut right to the top field marks.

Q: What are the top considerations when sourcing injection moulding screw barrels from manufacturers?

A: Main points hold size right, heat step quality, material pick, and OEM change skills. CHUANGRI SCREW covers all these. It gives trust fixes for world buyers.