China co-rotating twin screw extruder twin screw extruder double screw extruder in masterbatch self reversing screw shaft

Condition: New
Plastic Processed: PP/PE/PET/PVC/HDPE/LLDPE etc.
Application: Granules, Pelletizing, Wood plastic pelletizing
Screw Design: Double-screw
Twin Screw Type: Co-rotating Parallel Twin-screw
Screw Speed (rpm): 600 rpm
Showroom Location: Egypt, Italy, Viet Nam, Indonesia, Pakistan, India, Romania, Malaysia, Australia
Voltage: 220/380/415V
Dimension(L*W*H): 4000mm*800mm*1800mm
Weight: 4000 KG
Warranty: 1 Year
Key Selling Points: High Productivity
Applicable Industries: Manufacturing Plant
Video outgoing-inspection: Provided
Warranty of core components: 1 Year
Core Components: Motor, PLC, Gearbox
Machinery Test Report: Provided
After-sales Service Provided: Engineers available to service machinery overseas
Screw material: high speed tool steel W6Mo5Cr4V2
Shaft: high strength alloy 40CrNiMo
Screw structrue: modular screw structrue
Performance: corrosion resistance
Color: customized
L/D: 36/64
screw diameter: 50.5mm
Automatic Grade: Automatic
Marketing Type: Hot Product 2019
Packaging Details: Poly wood case

Twin screw plastic extruder machine for masterbatch
Parallel & tri-axial structure and dual rack drive system. Gear and shaft made of fine quality material, CZPT bearing oil-immersion lubricating system, low oil position & Original Japan CZPT CZPT CZPT CZPT NJ NU full roller cylindrical roller bearings nu2210 roller bearing rolling mill bearing overpressure alarming system. High rotating speed high torque high yield.
Screw Kneading block built on modular principle allows various L/D ratio of screw easily be changed to suit different material. Screw component made of high speed & wear-resisting steel.
By means of the replaceable screw barrel sections, the processing sections is devided
into individual zones. The barrels are heated electrically. In addition, the barrels are
provided with longitudinal bores for cooling with water. Uniform temperature distribution, namely on the circumference of the eightshaped barrel bore, is achieved by a reverse
forceflow temperature control circuit. Connections of pipes for temperature control are
in groove-tongue design to balance alternating thermal stress and avoid leakage.

>Suitable for:
–Polymer blending & filling modification
–Engineering polymer & glass fiber reinforcement
–Universal color masterbatch, functional masterbatch
–Special material, powder coatings
–Reactive extrusion, degassing & devolatilization

Packaging & Shipping
Company Information
20years of focus on plastic granules extruder development and manufacture of high tech enterprises, start at the beginning of 2000 square meters from the plant has grown to a modern standard plant 18, Agriculture Tractor Mounting Rear Tipping Trailer Price Tractor Hydraulic Tipper Trailer Provided 2-10ton Durable Gearbox CN;SHN 000 square meters, has a professional thread CNC grinding machines, machining centers and a variety of modern processing equipment more than 80 sets of modern factory. Has a complete advanced detection equipment and tools, to ensure that the product and the company full compliance with ISO9001 quality system certification ,TUV and CE certification standards.

Our Advantage:
Plastic granules making machine/twin screw extruder by ZheJiang Meizlon Machienry CO.,LTD .
Lowest Price: we are factory( factory add is : NO.18, feiying Road ,Xihu (West Lake) Dis. Development
Zone, Xihu (West Lake) Dis. ,HangZhou,China ) So you will share the lowest price & high quality machine and services from us.
Color: Any Color is Ok or per you request color do it, also standard color for you choose.
Packing: We have standing packing :
1) Wood poly case for main machine & Auxiliaries
2) Machine covered with a waterproof plastic film


Q1: Are you a factory or trading company?
A: We are factory in HangZhou ,with export license
and we have done export business over 20 years professional.
Q2:Where is your factory located? How can I visit there?
A:Factory add:NO.18,feiying Road,Xihu (West Lake) Dis. Development Zone, X5310 KV330 High quality Outrunner Brushless Motor for drone RC Multirotor Quadcopter Hexacopter industry application UAV drone Xihu (West Lake) Dis.,HangZhou,
China , Around 1 hour from ZheJiang to HangZhou by high speed train.
Warmly welcome to visit us!
Q3: Is your product can be assured ?
A: Our machine passed ISO9001:2001, has CE certificate by SGS, TUV.
Q4: What’s your advantages:
A: 1)Good quality guarantee
2)Professional Tech. and R&D team
3)Strict quality control as per ISO9001:2001 & TUV.
4) Passed CE certificate by SGS.
5)We will service for you in 24 hours and reply promptly
6)Fast production and delivery
7)Large international market
8)Very competitive price
If you have any questions, please dont hesitate to contact us immediately,
we will try our best to do so !
Our Services
Presales service
Introducing in detail features and application of the products to customer.
Selecting economical and practical machine & equipment for customer.
Providing operation data of the related machine & equipment.
Providing means of trial performance for customer.
Sales service
Recommending engineering conditions required for installation if the machine & equipment.
Communicating in time the manufacturing progress of the machine with user.
Providing assistance in technical conditions , high speed rodamientos baleros rolamento 6301 6206 zz 6202 rs 6300 6301 2rs 6306 bearings deep groove ball screw combination and barrel disposition needed for product.
Aftersales service
Providing on-the-spot technical assistance in installation ,commissioning and training.
Filing in detail customer’s information.
Providing long-term maintenance service and spare parts.
Giving technical support to customer for developing new product.
Providing free maintenance for a year.
Contact Us
Buyer Site

Screw Shaft Features Explained

When choosing the screw shaft for your application, you should consider the features of the screws: threads, lead, pitch, helix angle, and more. You may be wondering what these features mean and how they affect the screw’s performance. This article explains the differences between these factors. The following are the features that affect the performance of screws and their properties. You can use these to make an informed decision and purchase the right screw. You can learn more about these features by reading the following articles.


The major diameter of a screw thread is the larger of the two extreme diameters. The major diameter of a screw is also known as the outside diameter. This dimension can’t be directly measured, but can be determined by measuring the distance between adjacent sides of the thread. In addition, the mean area of a screw thread is known as the pitch. The diameter of the thread and pitch line are directly proportional to the overall size of the screw.
The threads are classified by the diameter and pitch. The major diameter of a screw shaft has the largest number of threads; the smaller diameter is called the minor diameter. The thread angle, also known as the helix angle, is measured perpendicular to the axis of the screw. The major diameter is the largest part of the screw; the minor diameter is the lower end of the screw. The thread angle is the half distance between the major and minor diameters. The minor diameter is the outer surface of the screw, while the top surface corresponds to the major diameter.
The pitch is measured at the crest of a thread. In other words, a 16-pitch thread has a diameter of one sixteenth of the screw shaft’s diameter. The actual diameter is 0.03125 inches. Moreover, a large number of manufacturers use this measurement to determine the thread pitch. The pitch diameter is a critical factor in successful mating of male and female threads. So, when determining the pitch diameter, you need to check the thread pitch plate of a screw.


In screw shaft applications, a solid, corrosion-resistant material is an important requirement. Lead screws are a robust choice, which ensure shaft direction accuracy. This material is widely used in lathes and measuring instruments. They have black oxide coatings and are suited for environments where rusting is not acceptable. These screws are also relatively inexpensive. Here are some advantages of lead screws. They are highly durable, cost-effective, and offer high reliability.
A lead screw system may have multiple starts, or threads that run parallel to each other. The lead is the distance the nut travels along the shaft during a single revolution. The smaller the lead, the tighter the thread. The lead can also be expressed as the pitch, which is the distance between adjacent thread crests or troughs. A lead screw has a smaller pitch than a nut, and the smaller the lead, the greater its linear speed.
When choosing lead screws, the critical speed is the maximum number of revolutions per minute. This is determined by the minor diameter of the shaft and its length. The critical speed should never be exceeded or the lead will become distorted or cracked. The recommended operational speed is around eighty percent of the evaluated critical speed. Moreover, the lead screw must be properly aligned to avoid excessive vibrations. In addition, the screw pitch must be within the design tolerance of the shaft.


The pitch of a screw shaft can be viewed as the distance between the crest of a thread and the surface where the threads meet. In mathematics, the pitch is equivalent to the length of one wavelength. The pitch of a screw shaft also relates to the diameter of the threads. In the following, the pitch of a screw is explained. It is important to note that the pitch of a screw is not a metric measurement. In the following, we will define the two terms and discuss how they relate to one another.
A screw’s pitch is not the same in all countries. The United Kingdom, Canada, and the United States have standardized screw threads according to the UN system. Therefore, there is a need to specify the pitch of a screw shaft when a screw is being manufactured. The standardization of pitch and diameter has also reduced the cost of screw manufacturing. Nevertheless, screw threads are still expensive. The United Kingdom, Canada, and the United States have introduced a system for the calculation of screw pitch.
The pitch of a lead screw is the same as that of a lead screw. The diameter is 0.25 inches and the circumference is 0.79 inches. When calculating the mechanical advantage of a screw, divide the diameter by its pitch. The larger the pitch, the more threads the screw has, increasing its critical speed and stiffness. The pitch of a screw shaft is also proportional to the number of starts in the shaft.

Helix angle

The helix angle of a screw shaft is the angle formed between the circumference of the cylinder and its helix. Both of these angles must be equal to 90 degrees. The larger the lead angle, the smaller the helix angle. Some reference materials refer to angle B as the helix angle. However, the actual angle is derived from calculating the screw geometry. Read on for more information. Listed below are some of the differences between helix angles and lead angles.
High helix screws have a long lead. This length reduces the number of effective turns of the screw. Because of this, fine pitch screws are usually used for small movements. A typical example is a 16-mm x 5-inch screw. Another example of a fine pitch screw is a 12x2mm screw. It is used for small moves. This type of screw has a lower lead angle than a high-helix screw.
A screw’s helix angle refers to the relative angle of the flight of the helix to the plane of the screw axis. While screw helix angles are not often altered from the standard square pitch, they can have an effect on processing. Changing the helix angle is more common in two-stage screws, special mixing screws, and metering screws. When a screw is designed for this function, it should be able to handle the materials it is made of.


The diameter of a screw is its diameter, measured from the head to the shaft. Screw diameters are standardized by the American Society of Mechanical Engineers. The diameters of screws range from 3/50 inches to sixteen inches, and more recently, fractions of an inch have been added. However, shaft diameters may vary depending on the job, so it is important to know the right size for the job. The size chart below shows the common sizes for screws.
Screws are generally referred to by their gauge, which is the major diameter. Screws with a major diameter less than a quarter of an inch are usually labeled as #0 to #14 and larger screws are labeled as sizes in fractions of an inch. There are also decimal equivalents of each screw size. These measurements will help you choose the correct size for your project. The screws with the smaller diameters were not tested.
In the previous section, we described the different shaft sizes and their specifications. These screw sizes are usually indicated by fractions of an inch, followed by a number of threads per inch. For example, a ten-inch screw has a shaft size of 2” with a thread pitch of 1/4″, and it has a diameter of two inches. This screw is welded to a two-inch Sch. 40 pipe. Alternatively, it can be welded to a 9-inch O.A.L. pipe.


Screws come in a wide variety of sizes and shapes, from the size of a quarter to the diameter of a U.S. quarter. Screws’ main function is to hold objects together and to translate torque into linear force. The shape of a screw shaft, if it is round, is the primary characteristic used to define its use. The following chart shows how the screw shaft differs from a quarter:
The shape of a screw shaft is determined by two features: its major diameter, or distance from the outer edge of the thread on one side to the inner smooth surface of the shaft. These are generally two to sixteen millimeters in diameter. Screw shafts can have either a fully threaded shank or a half-threaded shank, with the latter providing better stability. Regardless of whether the screw shaft is round or domed, it is important to understand the different characteristics of a screw before attempting to install it into a project.
The screw shaft’s diameter is also important to its application. The ball circle diameter refers to the distance between the center of two opposite balls in contact with the grooves. The root diameter, on the other hand, refers to the distance between the bottommost grooves of the screw shaft. These are the two main measurements that define the screw’s overall size. Pitch and nominal diameter are important measurements for a screw’s performance in a particular application.


In most cases, lubrication of a screw shaft is accomplished with grease. Grease is made up of mineral or synthetic oil, thickening agent, and additives. The thickening agent can be a variety of different substances, including lithium, bentonite, aluminum, and barium complexes. A common classification for lubricating grease is NLGI Grade. While this may not be necessary when specifying the type of grease to use for a particular application, it is a useful qualitative measure.
When selecting a lubricant for a screw shaft, the operating temperature and the speed of the shaft determine the type of oil to use. Too much oil can result in heat buildup, while too little can lead to excessive wear and friction. The proper lubrication of a screw shaft directly affects the temperature rise of a ball screw, and the life of the assembly. To ensure the proper lubrication, follow the guidelines below.
Ideally, a low lubrication level is appropriate for medium-sized feed stuff factories. High lubrication level is appropriate for larger feed stuff factories. However, in low-speed applications, the lubrication level should be sufficiently high to ensure that the screws run freely. This is the only way to reduce friction and ensure the longest life possible. Lubrication of screw shafts is an important consideration for any screw.

China co-rotating twin screw extruder twin screw extruder double screw extruder in masterbatch     self reversing screw shaftChina co-rotating twin screw extruder twin screw extruder double screw extruder in masterbatch     self reversing screw shaft
editor by czh 2023-03-20

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