Plastic Tube Types explained

With the array of collapsible plastic tube options available, it can sometimes be difficult to select the correct tube type for a product.

MonoLayer Collapsible Plastic Tubes:

Monolayer plastic tubes are formed through the extrusion process, where a cylinder of plastic material is pushed or drawn through the required diameter cross section and cut into the desired tube length.

Monolayer tubes are formed of one layer of plastic material, which can be made up of a certain percentage of LDPE or HDPE. e.g. tubes can be 100% HDPE, 80% HDPE 20% LDPE or any other requried combination depending on what properties you require from the tube.

Collapsible Plastic Tubes (Multi Layered Plastic Tubes):

A collapsible plastic tube comprising a laminate of an inner ply and an outer ply, the inner ply being a heat flowable nonoriented thermoplastic polymer and the outer ply being a heat flowable, oriented, shrunk thermoplastic polymer.

The collapsible plastic tube of this invention is also excellently adapted for making packaging and dispensing tubes for items such as toothpaste, shaving cream, lubricating greases, medicinal pastes, ointments, and the like.

Laminated Tubes:

Laminate tubes are manufactured by using the laminate feed stock that is simply a poly-foil-poly structure that has polyethylene on either side of a thin gauge of foil.
Some laminate structures also incorporate paper.

A subset of laminate is Polyfoil. The most popular way of decorating the laminate feedstock material is by either letterpress or rotogravure printing.

Rotogravure printing is used extensively to provide a high quality print buried within the laminate structure. Letterpress printing is used to decorate the surface of the laminate feedstock just prior to tubing that is ideal for added flexibility or smaller quantities.

Multiflex® Tubes:

Multiflex tubes are manufactured from laminate, however contrary to the lamination process there are no distinctive weld seams since the layers are not overlap-wealded, but fused bluntly and reinforced with a thin plastic strip, allowing for 360 degree print.

Also, with Multiflex tubes they are able to have different material in the inner layer compared to the outer layer, which is not possible with laminated tubes.

Source:https://www.sukoptfe.com/plastic-tube-types-explained

20 - 150 mm PTFE Tube Ram Extruder Machine

Single Screw Extruder Features Include:

1.Vertical Ram Extruder for PTFE Tubes

2.Ram extruding machine for PTFE Tubes.

3.Using for Pre-sintering PTFE material.

4.Suit for new PTFE material or Recycle PTFE material.

5. Adjustable Heating zone: 5 zone area

6. Long service life through solid workmanship and use of high quality components.

7. Measurement transducer like pressure, force and ram speed for permanent control of the extrusion process and extrusion speed.

8. Measuring and controlling system for constant extruder speed

9. Low space requirement through vertical construction

10.Operating through touch screen and recording of the extrusion process parameters

Benefits:

1. Save time and money, good advantage price offer to customers.

2. Intelligent and easy-to-use operations.

3. Small workplace required due to its compact design and electricity saving machine.

4. Super quality output and the physical properties is adjustable.

5. Precise temperature control, reaches + -1 degree.

6. Long- life, with modern technology and optimized design.

About Sintering Furnace Details

These sintering furnaces are equipped with electrical resistance heating or with inductive heating. They can be used for numerous purposes because they apply vacuum ...

TECHNICAL INFORMATION

1. Chamber Size:150 x 150 x 150 mm (6"x6"x6")
2. Working Temperature:400°C ( continuous )
3. Maximum Temperature:500°C
4. Temperature Control:30 steps programmable and PID automatic control
5. Heating Rate:0~15°C/min (suggestion: ≤10°C)
6. Temperature Accuracy:+/-1°C
7. Heating Element:Molybdenum Disilicide (MoSi2)
8. Working Voltage:AC 220V, Single Phase, 60/50 Hz (or according to your requirement)
9. Max. Power:24 KW
10. Outside Size:500 x 485 x 700mm
11. Wooden box size:600 x 585 x 900mm
12. Net Weight:95 Kg
13. Gross Weight:120 Kg

FEATURES

• Temperature sensor monitoring
• Current monitoring
• Superior-quality Heater Elements 

PLACEMENT OF UNIT

• When positioning the furnace, the minimum distance of the furnace and any wall is at least 30 cm. The furnace must be placed into a dry and heated room.
• Make sure that the unit is placed on a heat-resistant surface.
• The unit must not be exposed to direct sunlight.
• Do not place any combustible objects near the furnace.

SWITCH ON THE FURNACE

• Switch on the air switch at the rear of the furnace.
• Switch on the power switch on the Panel.
• Press Lift down key and lift will descend to its lower position.
  (Due to vibrations during transport particles of the firing chamber insulation will accumulate on the firing tray platform. They must be removed with a dry cloth)
• Function of panel and LCD screen; 
• Place firing tray on the firing tray platform.

SWITCHING OFF THE UNIT

If the furnace is not used, the lift should be moved into the firing chamber. Closing of the firing chamber will protect the insulation and avoid the absorption of moisture. After the lift tray platform has been moved into the firing chamber, switch off the power switch (switch to OFF). 

SAFETY ADVICE

For your personal safety we would like to ask you to read the following safety-relevant Information completely before starting-up the unit.

• Do not place any objects near the lift tray.
• Furnaces must not be operated without firing trays placed on.
• During continuous firing (the furnace runs with maximum temperature), the temperature at the middle of top shell of the furnace may reach high temperature about 150℃. Other parts of top shell are about 70℃. Don’t touch the muffle cover.
• If the furnace unit is connected to the mains supply, do not reach into the open firing chamber to avoid contact with live and hot components.
• Pull the plug from the power unit each time before the furnace is cleaned.
• It is not necessary to clean the interior of the firing chamber, cleaning of the casing with a wet cloth within regular intervals will ensure operational reliability.
• Basically, no flammable liquids must be used for any type of cleaning work. 

Vacuum Sintering Furnace Maintenance

Vacuum sintering furnace has been used for a long time,There will be some impurities left in the furnace. We need regular maintenance to avoid damage to the equipment.

1. when the vacuum sintering furnace is deactivated, the vacuum condition in the furnace should be kept below 6.65*104pa.
2. The dust cleaning furnace with ethanol or gasoline, moistened with silk, and dry.
3. the vacuum system or sealing structure and other parts of the equipment should be cleaned with ethanol or gasoline, and coated with vacuum grease after drying, and then assembled.
4. shell to avoid cleaning regularly, keep clean.
5. the workpiece, car, material frame, workpiece and so on, after cleaning, and then put into the furnace, to prevent moisture, impurities into.
6. when the transmission card, to limit and control the phenomenon of failure, should be immediately removed, to avoid forced operation, to avoid damage to equipment.
7. drive parts should be regular refueling or oil change.
8. vacuum pumps, valves, measuring instruments, thermal instruments and electrical components and other accessories, should be strictly in accordance with the instructions for use, maintenance and maintenance.
9. in the maintenance of vacuum sintering furnace, in the case of power failure, and if in the case of live maintenance, it is necessary to ensure the safety of maintenance personnel and equipment.

 

PTFE Manual Press Molding machine exported to Malaysia

 

We are providing our customers with the advantages of high output and low energy consumption, SUNKOO has successfully opened its market to USA, UAE, Korea, India, Russia, Malaysia, etc and attained good reputation among customers.

The machine has passed all the basic and necessary test before shipment to Malaysia. Our technical skillful staff check the machine thoroughly for all the machine before dispatching to shipment. The testing report sent to customer for satisfaction.

 

Manual molding press machine Sunkoo HM400T:

The machine production has capacity for tube is 150 pieces/hour and for rod is 300 pieces/hour.

400T-Platform1000*1000 , 8KW powder.380V3P50Hz.

Max mould height is 700 mm.The effictive travel of ram is 400mm. Down-up press for PTFE. cylinder diameter 500mm. Inside frame 1100*1000.

Moulds for PHM400T finished size:

a.    645 x 755 x 100 mm

b.    545 x 655 x 100 mm

c.    445 x 555 x 100 mm

d.    345 x 455 x 100 mm 

 

Customer Comments for Us:

“I remembered the time when I contacted with the Sunkoo Team, the team has very good communicational skills among its customers to satisfy the actual need. They provide me all the basic details and description about the manual press molding machine. The prices offered was really competitive as compared to market. Finally I am glad to have a manual molding machine. The output is high and much efficient as compared to other machine I have. The technical staff was very skillful and has expertise in their fields. “

What other customers think about us:

ü  I like its Special design for PTFE mold tube and rod. With Manual and Auto two different type operation.

ü  Sunkoo molding machine set up different press power level for high density. The output quality is very good.

ü  As a regular operator of  PTFE moldingmachine , the machine provided by Sunkoo has improved machine based design and efficiency stability over the current machine on the market. It can be used to mold all kinds of PTFE products. Work pressure can be adjusted within rated pressure.

ü  The good thing I found in the machine is, it has the independent electrical and hydraulic system, beside this  it has the adjustment, manual and semiautomatic operating methods and constant process and pressure.

ü  I am happy to have this machine, the price is very reasonable and affordable. I’ll recommend to other manufacturer as well try once you’ll get much profit easily.

 

CONTACT US:

PTFE Factory:No.8 Lvshu 3 road, Xuejia, Xinbei District,Changzhou, Jiangsu,China.213000.

Call us/Whatsapp:+86-13861180959

Skype:sammy.ljf

Mail: info@sukoptfe.com

Aluminum Extrusions

Extrusion is the process by which long straight metal parts can be produced. The cross-sections that can be produced vary from solid round, rectangular, to L shapes, T shapes. Tubes and many other different types. Extrusion is done by squeezing metal in a closed cavity through a tool, known as a die using either a mechanical or hydraulic press.

Extrusion produces compressive and shear forces in the stock. No tensile is produced, which makes high deformation possible without tearing the metal. The cavity in which the raw material is contained is lined with a wear resistant material. This can withstand the high radial loads that are created when the material is pushed the die. 

Extrusions, often minimize the need for secondary machining, but are not of the same dimensional accuracy or surface finish as machined parts. Surface finish for steel is 3um; (125 uin), and Aluminum and Magnesium is 0.8 um (30 uin). However, this process can produce a wide variety of cross-sections that are hard to produce cost-effectively using other methods. Minimum thickness of steel is about 3 mm (0.120 in), whereas Aluminum and Magnesium is about 1mm (0.040 in). Minimum cross sections are 250 mm2 (0.4 in2) for steel and less than that for Aluminum and Magnesium. Minimum corner and fillet radii are 0.4 mm (0.015 in) for Aluminum and Magnesium, and for steel, the minimum corner radius is 0.8mm(0.030 in) and 4 mm (0.120 in) fillet radius.

Cold Extrusion: Cold extrusion is the process done at room temperature or slightly elevated temperatures. This process can be used for most materials-subject to designing robust enough tooling that can withstand the stresses created by extrusion. Examples of the metals that can be extruded are lead, tin, aluminum alloys, copper, titanium, molybdenum, vanadium, steel. Examples of parts that are cold extruded are collapsible tubes, aluminum cans, cylinders, gear blanks. The advantages of cold extrusion are:

• * No oxidation takes place
• * Good mechanical properties due to severe cold working as long as the temperatures created are below the re-crystallization temperature
• * Good surface finish with the use of proper lubricants

Hot Extrusion: Hot extrusion is done at fairly high temperatures, approximately 50 to 75 % of the melting point of the metal. The pressures can range from 35-700 MPa (5076 – 101,525 psi). Due to the high temperatures and pressures and its detrimental effect on the die life as well as other components, good lubrication is necessary. Oil and graphite work at lower temperatures, whereas at higher temperatures glass powder is used.

Typical parts produced by extrusions are trim parts used in automotive and construction applications, window frame members, railings, aircraft structural parts.

Source:https://www.sukoptfe.com/aluminum-extrusions

Rotational Molding

Rotational molding uses gravity inside a rotating mold to achieve a hollow form. Also called rotomolding, it is an alternative to blow molding for making large, hollow shapes. It is used principally for thermoplastic polymers, but applications for thermosets and elastomers are becoming more common. Rotomolding tends to favor more complex external geometries, larger parts, and lower production quantities than blow molding. The process consists of the following steps: (1) A predetermined amount of polymer powder is loaded into the cavity of a split mold. (2) The mold is then heated and simultaneously rotated on two perpendicular axes, so that the powder impinges on all internal surfaces of the mold, gradually forming a fused layer of uniform thickness. (3) While still rotating, the mold is cooled so that the plastic skin solidifies. (4) The mold is opened, and the part is unloaded. Rotational speeds used in the process are relatively slow. It is gravity, not centrifugal force, that causes uniform coating of the mold surfaces.

Molds in rotational molding are simple and inexpensive compared to injection molding or blow molding, but the production cycle is much longer, lasting perhaps ten minutes or more. To balance these advantages and disadvantages in production, rotational molding is often performed on a multicavity indexing machine, such as the three-station machine shown below The machine is designed so that three molds are indexed in sequence through three workstations. Thus, all three molds are working simultaneously. The first workstation is an unload-load station where the finished part is unloaded from the mold, and the powder for the next part is loaded into the cavity. The second station consists of a heating chamber where hot-air convection heats the mold while it is simultaneously rotated. Temperatures inside the chamber are around 3750C(7000F), depending on the polymer and the item being molded. The third station cools the mold, using forced cold air or water spray, to cool and solidify the plastic molding inside.

A fascinating variety of articles are made by rotational molding. The list includes hollow toys such as hobby horses and playing balls; boat and canoe hulls, sandboxes, small swimming pools; buoys and other flotation devices; truck body parts, automotive dashboards, fuel tanks; luggage pieces, furniture, garbage cans; fashion mannequins; large industrial barrels, containers, and storage tanks; portable outhouses, and septic tanks. The most popular molding material is polyethylene, especially HDPE. Other plastics include polypropylene, ABS, and high-impact polystyrene.