Thursday, October 12, 2017

PTFE Ram Extrusion Line

A ram extruder is an extruder where, instead of extrusion screw, a ram or plunger is used . The ram extruder was the earliest extruder to be used in the plastics industry. This typical process is applied for producing profiles, sleeves, rod, block, tubing, lining sheet bars, etc. The ram extrusion process is very effective for specific materials like PTFE which are not extruded successfully using screw extruder.
PTFE Ram Extrusion Line
In this process plastic material in powder form is gravity fed into a chamber. In the extrudating chamber the resin powder is heated on sintering temperature. Ultra high molecular weight polyethylene, becomes gelatinous as it melts so it can be extruded with this type of processes. A hydraulic ram pushes the resin materials like PTFE, UHMW, etc. from the chamber to the die. The die actually gives the shape of the desired plastic like a rod, tube or a profile shape with the requisite internal or outer diameter. When the material comes out of the die, it moves the length of the conveyor. The profiles can be manufactured endlessly and cut by the continuous extruding of each length.
Types of Machines:
There are two types of ram extrusions- the vertical ram extrusion and the horizontal ram extrusion. Whatever be the type of ram extrusion, the resin feed, compaction or performing, sintering and cooling are all the same. But the extrudates quality depends on various parameter like the design of the extruder, powder properties, extrusion rate, pressure and temperature.
Source:https://www.sukoptfe.com/ptfe-ram-extrusion-line

Wednesday, October 11, 2017

Blow Molding Machine

Blow Molding Machine is a shape forming manufacturing process that involves forcing material into a die to make other shapes with that matetial. It’s like play dough. Imagine having play dough and pushing it through one of those tools with all the holes. You end up with play dough spaghetti. This is an example of extrusion. You can achieve a lot of different stock sizes and lengths by extruding. Like play dough.
The actual process involves a lot of math and hard work and a lot of set up. You start off with the material. Metal is typically used when doing extrusion. Then that material is pushed through another piece of stronger metal with a shape cut out of it where the material is forced out, creating that shape.
Blow Molding Machine is perhaps the simplest type of blow molding. A hot tube of plastic material is dropped from an extruder and captured in a water cooled mold. Once the molds are closed, air is injected through the top or the neck of the container; just as if one were blowing up a balloon. When the hot plastic material is blown up and touches the walls of the mold the material “freezes” and the container now maintains its rigid shape.
Blow Molding Machine allows for a wide variety of container shapes, sizes and neck openings, as well as the production of handleware. Extrusion blown containers can also have their gram weights adjusted through an extremely wide range, whereas injection blown containers usually have a set gram weight which cannot be changed unless a whole new set of blow stems are built. Extrusion blow molds are generally much less expensive than injection blow molds and can be produced in a much shorter period of time.

Tuesday, October 10, 2017

Horizontal Automatic Plastic Moulding Machine

Automatic molding, a semi-automated form of compression molding, is the process Sunkoo uses for the manufacture of medium-volume to large-volume net molded and near net molded Plastic components. The automatic molding process requires dedicated tooling, typically requires minimal operator intervention and plastic parts can be fabricated relatively rapidly.

With the use of precise tooling and processing, parts manufactured using the automatic molding process can be produced to relatively close tolerances, but not to the accuracy of a fully machined part. Components are economically molded by utilizing a process of automated filling of the die cavity, applying pressure, and part ejection.

Full automatic blow molding machine for handled bottle production,this model boasts with full automation,high intelligence,stable fuctioning,simple composition,high efficiency,low cost,no contamination in production,up to National Hygienic Standard,widely applied in food,beverage,cosmetics and pharmaceutical field,etc,especially find great applications in edible oil production industry.

Wednesday, September 6, 2017

PTFE gasket making machine

PTFE gasket making machine Features:Efficiently producing: 300pieces/h(large size);More energy saving: the total power only 5KW;More friendly to environment: no PTFE powder splashing but powder output automatically;More precise: producing gaskets by controlling the power quantity;More time saving : the power cut off automatically while the production number set up;Longer working life : no heat while working.
PTFE gasket making machine
Why Choose PTFE gasket making machine?
Efficiently producing: 300pieces/h(large size);More energy saving: the total power only 5KW;More friendly to environment: no PTFE powder splashing but powder output automatically;Intelligent control : producing gaskets by controlling the power quantity;More time saving : the power cut off automatically while the production number set up;Longer working life : no heat while working;high quality components used.
PTFE gasket making machine
PTFE gaskets are used in many industrial applications, especially the following:
1, Compressor – High temperature and surface-wear resistant sealing gaskets.
2, Electric Motor – Sealing gaskets for components that require corrosion-resistance, exposure to high and low temperatures and high surface wear.
3, Medical Component – Seals for electronic instrumentation using materials that provide secure seals and long product life.  Specialty gaskets, especially miniature sizes, are required for many medical devices.
4, Petrochemical – Gaskets for process equipment that are resistant to corrosive fluids, temperature extremes and surface wear.
source:https://www.sukoptfe.com/ptfe-gasket-making-machine

Tuesday, September 5, 2017

Horizontal PTFE Extruder

Horizontal PTFE extruder gives our customers great flexibility while occupying a minimum amount of floor space.
Horizontal PTFE Extruder
Horizontal extruders are come in standard sizes of 25-Ton, 50-Ton, 75-Ton, and 100-Tons of thrust, with stroke lengths of 36", 54", 72", 108" and the World’s Longest Stroke Extruder. This allows productivity unmatched in the industry.  It gives the World's Highest yield per cycle and when combined with our other equipment, makes the perfect extruder for a wire line or tubing line.
Horizontal PTFE Extruder Advantages
* Long service life through solid workmanship and use of high quality componentes
* Low wall thickness tolerance through self-centering mandrel and special nozzle
* Additional heatable extrusion cylinder for better extrusion quality
* Measurement transducer like pressure, force and ram speed for permanent control of the extrusion process and extrusion speed
* Hydraulic closure with high closing force for quick loading of the extruder
* Quick loading with special loading carriage - also possible with several pre-forms, no manual touch
* Special pre-form press with pre-form preparation device for multiple loading of the loading carriage i.e. extruder
* Electrically adjustable mandrel
* Measuring and controlling system for constant extruder speed
* Controlling system for constant speed of the extrudate
* Low space requirement through vertical construction
* Front and back charger, vertical and horizontal possible with hydraulic and spindle drive (2 degrees of accuracy)
* Delivery of complete systems possible (PTFE processing, pre-form press, paste extruder oven, winding unit as well as convoluting machine)
* User-friendly and maintenance-free system
* Special drying and sintering oven with adjustable blind, thus a better temperature guidance within the two zones and avoidance of explosion hazard
* The paste extrusion systems are designed especially to costumers requests
* Automatic adjustment of the total system as well as recording of the formula
* Operating through touch screen and recording of the extrusion process parameters
Source:https://www.sukoptfe.com/horizontal-ptfe-extruder

Monday, September 4, 2017

The difference between several kinds of powder blending machine

The mixing materials of conical twin screw mixer and horizontal ribbon blender are similar, basically common. Conical twin screw mixer has requirements about the factory height; in addition to powder it can also do biological fertilizer and other water products. It uses a dual output reducer, can be added spray device and jacket heating, in order to prevent damage to the machine generally do not set the reverse rotation. Conical twin screw mixer’s rotation mode inclueds both rotation and revolution.

Horizontal ribbon blender’s motor is larger, in addition to ordinary powder, it can make slurry, and it is better to choose horizontal ribbon to make granular materials. But it has some restrictions due to its sealing problems. It can set the reverse rotation, and without revolution.

Besides, powder blending machines also have coulter mixer and agravic mixer. Coulter mixer mixer’s mixing materials might get agglomerate, and it is much easier to get agglomerate if mixing solid-liquid materials. Once coulter mixer adds plow knife, it has effects of breaking materials. Agravic mixer is generally used for mixing materials which has a large specific gravity, such as mixing cement. And its mixing space is W-shape, using biaxial fan-shape paddles.

Wednesday, August 30, 2017

Isostatic Moulding Machine

Manufacturers of seals and other components utilizing Teflon (PTFE) quickly that they end up sweeping most of their profits out with the machining chips when producing parts from traditionally compression molded rods and tubes. PTFE resins are expensive and making parts from compression molded rods or even tubes often ends up yielding only 10-20% of the material purchased into the finished parts. Since PTFE, once sintered, cannot be reground and reused, 80% of the material cost end up in the trash. The answer is to use isostatic molding techniques to produce thin walled tubing.
Moulding Machine
Originally, when missile nose cones heat shields were manufactured from PTFE, a technique was needed to evenly compress PTFE powder across the bullet shaped surface of a nose cone. This was done by placing PTFE powder over a nose cone shaped aluminum plug, then covering the powder with an elastomeric bladder. The plug, powder and bladder were then placed in a pressure vessel and high pressure water pumped in to achieve the compression of the powder into the preformed shape ready for oven sintering.
As an interesting side note, as rockets grew, and the nose cones became too large to fit into pressure vessels, the bladder-covered plugs with resin powder sandwiched inside were simply lowered into the ocean to the appropriate depth to achieve the appropriate compression pressure.
Modern isostatic molding machines have come a long ways from the missile nose cone days. Now they use oil instead of water in cylindrical pressure vessels. Isostatic molding machines generally use a hydraulic pressure system feeding a custom intensifier to kick the pressure up from the usual 3000 psi hydraulic system components to the higher pressures needed to achieve ideal physical properties in the molded PTFE.
The better designs utilize interchangeable mandrels to make the unit adaptable to many sizes of tubing, and polyurethane end pieces and outer diameter forms to transfer the hydraulic pressure from the urethane bladder to varying different sizes of tubing. The soft urethane acts as a fluid itself to transfer the hydraulic pressure to the powdered resin being compressed. By using soft end bells, end belling common with earlier designs is eliminated so that the entire length of the molded tube is usable.
Minimal hydraulic controls are required, and the majority of the hydraulic components needed are available off-the-shelf. The exception is the intensifier, which must usually be designed from scratch to achieve the required pressure boost and volume make-up requirements of such a large, flexible hydraulic system.