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HOME > Product Information > Rubber extruder > Silicone Rubber Extruder

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Silicone Rubber Extruder

  • new

Dedicated extruder aimed at improving the quality and workability of silicone rubber products!!!

In recent years, silicone rubber materials have been used in various fields of such as electronic parts, electric vehicles, food, and medical care other than those used in conventional industrial products, due to the evaluated properties such as odorlessness, heat resistance, cold resistance, and flexibility, which are unlikely to cause chemical reactions with other substances.

Mitsuha's silicone rubber extruder is designed and manufactured as a dedicated machine with various ingenuity in order to maintain the quality and to cope with the properties peculiar to silicone rubber materials in these fields where demands are strict. 

Features

1.Abundant variations

We have screw sizes from 20 mm to 120 mm depending application and throughput.

We also have vent type extruders with degassing function in each size, so we can propose and provide the most suitable extruder to meet your needs.

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2.Screw shape

We use a screw that suppresses heat generation by shearing, for silicone rubber shows a sensitive cross-linking reaction due to changes in extrusion temperature.



3.Wear resistance measures

As a measure against wear by silica, wear-resistant metal is used as standard on the inner surface of the cylinder, which is difficult to replace.

For screws, which are consumables, the type of mountaintop hardened on a general SCM material is a standard specification, but a type with wear-resistant treatment on the mountaintop or a type changed to a wear-resistant material is also available as an option. In this sense, you can choose any type according to the frequency of wear depending on the silica content and grain size.

4.Colored measures

In case of extruding translucent or white silicone rubber, if you are worried about the problem of coloring due to the metal touch on the screw and cylinder inner surface, we will propose some improvement plans based on our experience and achievements. Please contact us.

5.Feed section (material input section)

A separate drive type that can independently drive the rotation of the feed roll with a dedicated motor is also available as an option so that the difference in biteability depending on the material can be adjusted. Rotation control can also control the ratio to screw rotation.

In addition, for the adhesiveness and low viscosity of silicone rubber, the shape of the material input part (input from below along the feed roll so that the ribbon material does not break/cut) and the scraper material to scraped off easily are solutions. By devising the scraper (razor) material and the shape of the undercut under the feed roll, it is a dedicated machine that is different from the feed section of the general synthetic rubber.

6.Abundant head variations

In order to meet the needs of our customers, such as crossheads for electric wire sheathing, T-dies for sheets, and multi-layer heads, we offer completely custom-made heads designed and manufactured in-house according to the extrusion shape and application.

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Upward extrusion             Two-color profile extrusion head        Sheet extruded head                                Crosshead for cable sheathing

crosshead for tubes

7.Abundant downstream devices

We also have a large number of downstream devices suitable for quality improvement and workability improvement at the manufacturing site of silicone rubber products. Here are examples.

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 Hot water circulation device

Basically, it is a silicone rubber that does not require cylinder temperature control, but it is essential to suppress discharge variation in order to produce products with severe accuracy. A hot water circulation device is recommended as an indispensable facility for the purpose of keeping the supply water temperature constant regardless of the difference in outside air temperature and water temperature depending on the season.

Click here for Hot water circulation device.



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 Material feeding device

When the customer puts the vulcanizing material with an open roll or a pressure kneader and performs the B kneading process, it is necessary to make it into a ribbon shape for throwing in the extruder, and the work process increases when it is attached with a paper pattern etc. On the other hand, installing this equipment will lead to improvement.

This equipment is a material loading device that loads materials kneaded with an open roll or pressure kneader as a lump and extrudes it to the optimum ribbon width for loading to an extruder with a hydraulic cylinder.

Since the ribbon is pushed in by detecting the slack in the ribbon between it and the extruder, the operator does not always stick to the input section and does not require release paper, which leads to labor saving and running cost reduction.

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 Gear pump

In order to manufacture thin-walled products and small-diameter products with strict dimensional accuracy, it is essential to suppress throughput variations.

Throughput accuracy is further improved by combining a gear pump that fills the valleys of fine gears with material and extrudes it with an extruder. In addition, by keeping the inlet pressure of the gear pump constant, shear heat generation in the extruder can be suppressed, so even if a fine mesh is used, it can be extruded at a low temperature, leading to improved quality. (For the features of the gear pump, we have prepared an individual catalog, so please request it.)

Click here for gear pumps.

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 Vulcanizer

If you want to continuously vulcanize the extruded product online, We can make proposals to use the vulcanizer as a set. Depending on the product specifications and conditions, you can choose from horizontal or vertical type, from several types of heat sources such as heater type or warm air type.


8.Proposal as a system

As Mitsuba MFG. Co., ltd. designs and manufactures ancillary devices other than extruders as described in the previous section, if you let us know your request, we will propose it as a production line.

In addition, since we also control hardware and software in-house, it is our greatest feature that we could propose a system that includes control that brings workability and safety closer to the customer's ideals based on in-depth discussions between mechanical designers and electrical designers from the design stage.

We would like to introduce an example of silicone rubber manufacturing equipment.



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 Horizontal Silicone Rubber Vulcanization Line

Ideal for manufacturing thin products such as medical and equipment piping. It can also be used for extrusion of irregularly shaped products other than tubes.

Click here for the horizontal silicone rubber vulcanization line .



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Medical catheter                                                           Silicone tube


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 Silicone rubber wire line

We have a lineup of models suitable for each application, from thin wires with an outer diameter of φ1 mm or less to thick ones with an outer diameter of around φ30 mm.

Click here for the silicone rubber wire line.

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Charging cable for electric vehicles


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Vertical Silicone Rubber Vulcanization Line

For horizontal extrusion, we recommend the vertical vulcanization method for thin-walled products, thick products, and irregularly shaped profile products that may be deformed or crushed before vulcanization.

Click here for the Vertical Silicone Rubber Vulcanization Line.

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Packing for coolers and dryers


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 Silicone rubber roll manufacturing equipment

This is an equipment that manufactures by coating a core material such as a roll for a printer with silicone rubber.

It is fully automatic from supplying the core material to loading it on the pallet.

Click here for roll manufacturing equipment

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Printer roll

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