1. PLAIN SCREW PADA MESIN INJEKSI PLASTIKPlain screw adalah salah satu part atau bagian terpenting dari mesin injeksi yang berfungsi

sebagai pendorong atau alat untuk menginjeksikan plastic lumer (melten plastic) ke cetakan plastic melalui nozzle.

Gambar dan Bagian Screw Tip

Terdapat 5 bagian utama pada plain screw yaitu : Feed zone Compression zone atau transition zone Metering zone Cheking ring Screw tip

Macam- Macam jenis plain screw mesin injkesiScrew tip memiliki beberapa jenis dan bentuk. Ini berdasarkan fungsinya masing- masing.

Berikut gambar dan keterangan fungsinya:

Keterangan : Screw tip tipe a

Standart screw with shear element and mixing element Screw tip tipe b

Standart screw with torpedo Screw tip tipe c

Standart screw with shear ring at backflow valve and torpedo at tip Screw tip tipe d

Longer standart screw Screw tip tipe e

Longer standart screw with shear bearing and mixing element Screw tip tipe f

Longer standart screw with mixing pins Screw tip tipe g

Longer standart barrier screw with shear bearing and mixing element

2. TYPICAL RECIPROCATING SCREW

D = Outer Diameter of ScrewL = Effective Length of Screwh2 = Flight Depth of Feed Zoneh1 = Flight Depth of Metering Zone

(typically 0.15D - 0.18D)(typically 0.05D - 0.06D)

Length/Diameter Ratio = L : D Range typically of 16 : 1 to 26 : 1.(normal method) We suggest about 20 : 1.

• Compression Ratio = h2 : h1 Range typically of 2.0 : 1 to 4.5 : 1.(simplified form) We suggest 2.2 : 1 to 2.5 : 1.

• Screw Types Shear Driving Mixing Metering Heating Torque Capacity Precision

Low Compression Low Small Low Low(2.2 : 1 to 3.0 : 1)High Compression High Large High High(3.0 : 1 to 4.5 : 1)

• Note that a “General Purpose Screw” is usually a High Compression type.

3. BLOCK SCREW

Process Specification of Screw and Barrel ： Ф60/2, Ф65/2, Ф70/2, Ф72/2, Ф75/2, Ф80/2, Ф85/2, Ф90/2, Ф93/2, Ф100/2, Ф105/2, Ф110/2,Ф115/2, Ф120/2, Ф125/2, Ф130/2, Ф140/2, Ф150/2, Ф160/2, Ф170/2, Ф180/2, Ф190/2, Ф200/2,Ф250/2

Acope of Application：Usually used for lens.transparent shell.cosmetic packaging containers,transparent

acrylic.Nylon,PVC,PC,PPA,PPO,PPS,PA6T,LCP,ABS fire prevention,bakelite,P+glass fiber,nylon +glass fiber,magnetic powder,ceramic powder,aluminum and magnesium powder,iron powder,electric injection machines,wood and plastic PVC,PE wood and plastic,ultra-high molecular plate,baking-free brick layer board,above 1to2 high calcium gusset plate,more than50-400%high calcium pipe material,50-300 high calcium profiles,soft PVC sheet,PVC foaming board common plastic,PP,PE,ABS,PVC,raw material pelleting,pipe,profile,sheet,engineering plastic modified granulation,screw elements--HRF10 Extremely superfine diamond tungsten steel；screw elements--VRA201 Imported superfine diamond tungsten steel；screw elements--ASP60C(Super high wear resistant)；screw elements--MR11(MR12)Extremely superfine diamond tungsten steel；screw elements--SKH55A；screw elements--PR40:

4. CONICAL TWIN SCREW AND BARREL

Process specification of screw and barrel：Ф15/Ф30，Ф25/Ф55，Ф35/Ф75，Ф40/Ф83，Ф45/Ф90-99，Ф48/Ф112-117，Ф50/Ф105-110 ， Ф51 / Ф105-120 ， Ф55/Ф110-125 ， Ф58/Ф125 ， Ф60/Ф125-129 ， Ф65/Ф120-132，Ф68/Ф147，Ф70 /Ф150，Ф74/Ф156-162，Ф80/Ф143-156-162，Ф86/Ф177，Ф92/Ф184-188，Ф95/Ф193，Ф105 /Ф203

Types of Screw：Gradual type,mutant type,wave type,barrier type,double screen type,shunt type,separation

type,exhaust type,pin type,mixed type,double-head type,three-head type,multi head type etc.scope of application：WPC PVC,WPC PE,Super high molecular sheet,1/2 high Calcium buckle,50-400 high Calcium pipe,50-300 high Calcium Profile,soft PVC sheet,XPS-PVCetc,PP,PE,ABS,PVC,raw material,pelletzing,pipe,profile,sheet etc.

5. EASY MELT INJECTION SCREWS

DescriptionEasyMelt combines the simplicity and economy of a conventional three-zone screw with the

productivity and quality benefits of optimum material feeding, melting and metering. General-purpose injection screws leave hard-to-get molding profit on the table. The Nordson XALOY EasyMelt™ injection screw helps you recoup with screw geometry optimized for specific material(s).

Efficient melting,thanks to its resin-tailored feed depth, compression ratio and zone lengths, EasyMelt delivers fully melted material to the metering zone. This avoids a major cause of intermittent short shots: partially filled flights and pressure instability in the metering zone.

6. PARALLEL TWIN SCREW AND BARREL

Process Specifications of Screw and Barrel:Ф60/2, Ф65/2, Ф70/2, Ф72/2, Ф75/2, Ф80/2, Ф85/2, Ф90/2, Ф93/2, Ф100/2, Ф105/2, Ф110/2, Ф115/2, Ф120/2, Ф125/2, Ф130/2, Ф140/2, Ф150/2, Ф160/2, Ф170/2, Ф180/2, Ф190/2, Ф200/2, Ф250/2

Types of Screw:For good plasticizing effect , we have different design of screw barrel to meet customer’s demand .Gradual type, mutant type, wave type, barrier type, double screen type, shunt type, separation type,exhaust type, pin type, mixed type, double- head type, three-head type, multi head type etc.

Scope of application：WPC PVC.WPC PE,Super high molecular sheet,1/2 high Calcium buckle,50-400 high Calcium

pipe,50-300 high Calcium Profile,soft PVC sheet,XPS-pvcetc.PP,PE,ABS,PVC,raw material,pelletzing,pipe,profile,sheet etc.

7. PLANET SCREW CYLINDER

Planetary Screw Specialized In:1. Rigid PVC products: plastic sheet,PVC medical PVC sheet,PVC card substrate,PVC

poker card material,PVC watches sheet,colored PVC sheet.2. Semi rigid PVC products: semi rigid PVC adhesive tape,printing cloth,advertising

materials,light box cloth,decorative materials(film).

8. RUBBER SCREW AND BARREL

9. SCREW AND BARREL FOR EXTRUSION MACHINE

Process specification of Screw and Barrel: Specification:Ф15-Ф360MMThe ratio of length to diameter:L/D=12-45

Types of Screw:For good plasticizing effect,we have different design of screw barrel to meet customers

demand.Gradual type,mutant type,wave type,barrier type,double screen type,shunt type,separation type,exhaust type,pin type,mixed type,double-head type,three-head type,multi head type etc.

10. FUSION SCREW

Description:The Nordson XALOY® Fusion™ II screw delivers enhanced chaotic mixing while retaining

the productivity benefits of faster plastication and lower melt temperature provided by the original Fusion™ screw. Like the original Fusion™ screw, the Fusion™ II has two barrier zones. The first melts and meters the material forward to a homogenizing transition zone. This zone is followed by a second barrier zone with an undulating root profile providing intensive, chaotic mixing. The key difference between the Fusion™ II screw and earlier models is that primary flights in the second barrier zone have grooves. The new design is covered by U.S. patent no. 7,014,353, and has also been applied for international protection throughout the world, in Asia, Europe, and South America.

The grooves in the flights allow materials in adjacent melt channels to mix together, thus enhancing the intensive, chaotic mixing action produced by the screw’s undulating root profile.

This further improves the dispersion of color and additives in the melt and enhances melt homogeneity. The Fusion™ II delivers the same productivity benefits as the earlier design. In injection molding, extrusion and blow molding, the Fusion™ II can deliver increases in plasticating rate of 15 percent and melt temperature reductions of up to 10ºC compared with standard mixing screws.

11. Z-MIXER SCREW

DescriptionThe Nordson XALOY Z-Mixer™ Screw is the best dispersive mixing screw in the

industry. Its patented geometry utilizes mechanical potential in the melt stream to efficiently disperse additive packages. The unique "Z" formation channels the melt stream to high shear areas for a more thorough chaotic mixing action.

Applications:Most crystalline resins with color or additive packages that demand optimum dispersive mixing.Successful applications in injection molding utilizing a variety of resins including PE, PP, PA and ionomer.

 Benefits:Excellent quality & appearance.Enhanced product performance.Better physical properties.Reduced scrap rates.

Advantages:No marbling or streaking.Strong weld lines.

Rating:When compared to a single stage, general purpose screw of comparative root geometry, the Z-Mixer screw delivers a mixing quality of 5 times better.

12. V-MIXER SCREW

DescriptionThe Nordson XALOY V-Mixer™ Screw offers a patented "pump-through" mixing

design that generates localized high and low shear areas with low mixer pressure drop. Its unique geometry generates mixing forces in two directions. A squeezing action forces the melt stream towards the barrel wall (up and down) and between the flights (side to side) concurrently. The adjustable channel depth varies the levels of dispersive vs. distributive mixing.

Advantages:Processes a variety of materials.Comparatively lower melt temperatures.Less back pressure required.Quick color changeability.No marbling or streaking.

Benefits:Wide application and processing window.Lower scrap rates.Controlled geometry enables use with shearsensitive resins.Excellent part quality and surface finish."Pump-Through" design gives higher throughput than other dispersive mixers.Quick color changes.