55Kw Rubber Strip Extruder For Producing Rubber Automobile Wiper Blades

Product Specification

55Kw Rubber Strip Extruder For Producing Rubber Automobile Wiper Blades

Machine Introduction
 

The 90mm diameter screw rubber extruder manufactured by BEISHUN is a kind of equipment used for processing rubber materials, usually used for producing rubber products such as sealing strips, pipe fittings, rubber cords, etc. The following is a general introduction to the 90mm diameter screw rubber extruder:

Features of 90mm diameter screw rubber extruder:
 

1.Screw diameter: The 90mm screw diameter is moderate. The screw is made of high-strength alloy steel. It is melted into products through molds and then processed in one piece through the CNC numerical control center. It has good wear resistance and high strength. It is suitable for processing different specifications of rubber hardness and viscosity.

2.Extrusion capacity: The extruder is equipped with a 55kw motor power system, which can rotate and extrude rubber particles or mixed rubber through the screw, and then form a continuous rubber strip product through the extruder head.

3.Heating system: Usually equipped with a heating system to maintain the temperature inside the extruder to ensure that the rubber material can be fully heated, melted and extruded.

4.Cooling system: The extruder screw and the machine body are equipped with a water cooling system to reduce the extruder temperature during operation, ensure that the machine continues to work well at a constant temperature, and cool the extruded rubber products to ensure their solidification and stability.

5.Control system: It has imported electronic appliances and accessories such as PLC Siemens or Mitsubishi, control buttons and touch control panel or computer control system to monitor and adjust extrusion parameters, such as temperature, pressure and speed will be displayed.

6.Production efficiency: The machine can extrude 200-500kg per hour, and the extrusion speed can be controlled according to different product models. It can continuously and efficiently produce rubber products and is suitable for continuous production in industrial production lines.
 

7.Scope of application: It is suitable for processing various types of rubber materials, such as EPDM, SBR, NBR, etc., and is used to produce rubber products for different rubber tubes, rubber sealing strips, rubber wipers, etc.

Machine parameter:

Wiper production process:

The production process of rubber wipers generally includes the following steps:

1. Rubber strip production:
- Raw material preparation: Use natural rubber such as Dajinbei imported from Vietnam as the main raw material, and carbon black from the American brand Cabot as an additive material, and mix them in a ratio of 10 to 1 between natural rubber and carbon black.
- Mixing: Put the natural rubber into the internal mixer, and after about 11 minutes of crushing and stirring, make it initially mixed and evenly mixed, and then repeatedly press the open mixer to squeeze out the air inside, turning it into a rubber roll similar to a Swiss roll. Then it enters another internal mixer with carbon black to be refined into black rubber blocks.
- Repeated sheeting and formula addition: The black rubber block enters the second open mixer and is repeatedly sheeted at least five times. Some other formulas are added during this process until the workers are sure that all the raw materials are mixed evenly.
- Cooling and cutting: The pressed black rubber sheet passes through a huge conveyor belt, and after water cooling and air cooling, it is cut into square blocks suitable for mold opening.
- Vulcanization and shaping: Put the rubber sheet into the mold, and shape it at a high temperature of 180 degrees Celsius for 200 seconds to produce a rubber strip. Note that the newly produced strips are a pair of sticky strips.
- Processing: First pickle the strips to roughen their surface, and then spray graphite to allow the graphite to evenly adsorb on the rough strips to restore the gloss of the strips, while ensuring that there is no abnormal sound when the strips are used. Finally, use a double-blade cutter to cut a gap straight from the middle of the pair of strips connected together, and gently tear them by hand to get a pair of perfect wiper strips.
2. Steel bar production:
- Raw material selection: Use steel bars from the Belgian brand Bekaert, which is also the original wiper steel bar supplier for many BBA models.
- Cutting and shaping: Send rolls of steel bars into the steel bar mold cutting machine, quickly cut and shape them, and turn them into sections of wiper steel bars that meet the requirements of different sizes and models. Since the length and curvature of the wiper steel bars of different models are different, they need to be produced with a boomerang-like mold. The factory generally has tens of thousands of such molds.
- Anti-rust treatment: Give the cut steel bars an anti-rust electrophoretic layer. Specifically, the steel bars are immersed in an electrophoretic pool and the paint and metal are attached through a DC electric field. This adhesion is much stronger than ordinary spray paint, which can make the steel bars more corrosion-resistant, but the cost will also be higher.
3. Plastic shell production:
- Mold preparation: It has its own mold production workshop and high-precision CNC machine tools, and can match and develop wiper shells and buckle molds for new models on the market at any time. There are tens of thousands of molds for making shells and buckles in its mold workshop, which almost cover most of the models currently on the market.
- Injection molding: Put these molds into digital injection molding machines, and you can complete the production of wiper shells in batches. It takes about ten seconds to produce 5 pairs of wiper guide plates. The production of wiper plastic buckles also uses high-precision digital injection molding machines, which can be completed in a dozen seconds.
4. Assemble the wiper:
- Component assembly: First insert the steel bar into the red plastic clamp, insert it halfway (when it is in the slot on the steel bar), press a small metal spring on the steel bar slot, and then insert it into the clamp together with the steel bar. Then install a plastic positioning buckle on one end of the steel bar, and then insert the installation base of the wiper arm into the plastic clamp from the other end of the steel bar, and insert it to the middle position. After hearing two clicks, the base cannot move left or right, indicating that the base is installed in place. Then install the plastic positioning buckle on the other end of the wiper, and then install the plastic deflectors at both ends of the wiper. Directly clamp the slot of the clamp, and you can insert the deflectors smoothly.
- Install the rubber strip: Align the slot of the rubber strip with the slot of the clamp and insert it directly, all the way to the end, confirm that the ends of the rubber strips at both ends are fixed in the plastic positioning buckles at both ends of the wiper, complete the installation of the rubber strip, and a complete wiper is assembled.
5. Test:
- Sample sampling: Each batch of wipers will be sampled for multiple tests before leaving the factory.
- High and low temperature test: Put the finished wipers into a high and low temperature test box, and change the temperature repeatedly at -40℃ and 80℃ within 72 hours, and observe whether the surface of the wipers melts or freezes. If not, it is qualified.
- Anti-oxidation test: Remove the wiper rubber strip, fix it on the detector, expose it to ozone concentration of up to 50pphm for 72 hours, and finally take it out and magnify it five times under a magnifying glass to observe whether there are cracks caused by oxidation on the surface of the rubber strip. If not, it is qualified.
- Anti-ultraviolet test: Mainly test the plastic shell (deflector and buckle) of the wiper, expose them to strong ultraviolet rays for 72 hours, and then observe whether their surface has plastic aging. If not, it is qualified.
- Wiper use test: The wiper needs to be able to clean the glass and make no abnormal noise after 1 million rounds back and forth in a simulated use environment.
- Salt spray test: to test the corrosion resistance of the wiper steel strips. The wiper steel strips must be guaranteed not to rust in the high-concentration salt spray within 48 hours to pass the test. Only after passing all the above tests can the wipers be shipped out of the factory.