DE102007031989A1 - Device with a sieve used in the manufacture of elastomer mixtures comprises a support plate with through bores containing heat exchanger tubes and sealed at one end to prevent penetration of the mixture components - Google Patents

Abstract

Device (5) with at least one sieve used in the manufacture of elastomer mixtures comprises at least one support plate (1) with through bores (3) arranged perpendicular to the mixture flow direction. The through bores each contain at least one heat exchanger tube and are sealed at one end to prevent penetration of the mixture components. Preferred Features: The through bores each contain at least two heat exchanger tubes. The support plate is made of an aluminum material.

Description

The Invention relates to an apparatus for producing elastomer mixtures, the at least one sieve and at least one support plate having, wherein the support plate with its edge region is supported against the device.

at the production and further processing of rubber compounds It is often necessary to mix solid foreign bodies to clean. For this purpose, the mixture is under high pressure by a pressed fine-meshed sieve. This procedure is called Strainer process called. In promoting the mix in machines such as extruders or gear pumps Energy is introduced into the mixture and as heat dissipated. The faster the process is running, d. H. at higher Throughput, the stronger the heating of the mixture. Because when processing rubber compounds a maximum temperature can not be exceeded, the temperature is often the size determining the throughput.

In order to protect the mixtures from premature vulcanization or other chemical-physical changes, the machines or their elements are cooled. In the DE 10 2005 019 874 A1 discloses a device in which a mixing stream is conveyed through a cascade of several kneaders, wherein the heat generated in the mixture is cooled by large heat exchange surfaces or by intensive cooling with a liquid coolant in the individual kneading from the outside.

The Cooling effect is on the one hand of the size the contact surfaces, but also from the contact of the mixture components dependent on the contact surfaces. The interior of the Mixture streams is often insufficient Coolable, allowing the mass flow through the mixing plant is limited.

Of the Invention is based on the object, the mass flow rate of the mixture by the device mentioned by improved cooling to increase.

These Task is solved in that the at least one support plate arranged transversely to the flow direction of the mixture flow, has through holes, in each case at least one heat pipe is introduced and the ends are sealed, so that no Can penetrate mixture components.

The Heat pipes or heat pipes are known components, due to their filling with a steam-water phase allow a particularly good heat transfer.

The through the mixing flow into the sieve and the support plate introduced heat can with the help of the invention Arrangement especially well also from the center of the support plate flow to the edge of the support plate, where through a suitably designed contact area between Support plate and device that transported there Heat is easily dissipated.

In a development of the invention, the holes of the support plate at least two heat pipes each.

There Heat pipes according to the prior art, the heat can only carry away in one direction is through the use of two or more heat pipes of removal the heat in the holes of the support plate after both ends possible, so that the usable contact surface between support plate and device increases accordingly is. As a result, a larger amount of heat is dissipated.

In a development of the invention is the support plate formed of an aluminum material.

It has shown that aluminum materials in terms of dissipated amounts of heat particularly favorable Have values.

calculations have shown that when using the inventive Device with a conventional plate diameter of about 250 mm and a mixing flow of about 1000 kg / h the temperature the mixture is lowered by about 10 K.

Based The drawing will be closer to an example of the invention explains:

It shows

1 a schematic representation of a support plate according to the invention in plan view and 2 the support plate in cross section.

In the 1 shown support plate 1 has arranged perpendicular to the plane of the drawing, through-flow holes 2 on, through which a mixing stream of mixture particles, not shown, can be pressed. Transverse to the flow holes 2 and parallel to the plane of the drawing are continuous cooling holes 3 arranged in the interior of the support plate between the flow holes 2 run and are shown here gestrichtelt.

A contact between the flow holes 2 and the cooling holes 3 does not find instead, the holes 2 and 3 are due to the material of the support plate 1 spaced apart and separated, so that no material exchange can take place.

The support plate 1 rests with its outer edge 4 against a mixing device, not shown here.

In 2 is a cross section through the device according to the invention shown. The backing plate is from a mixing device 5 comprising, wherein the mixing device 5 a flow channel 6 has and the support plate 5 is arranged concentrically to the flow channel.

The mixing device 5 also has a paragraph also concentric to the flow channel 8th on, against which the support plate 1 supports, with the support plate 1 by the mixing flow, not shown here, against the heel 8th is pressable.

Between the support plate 1 and the mixing device 5 is a contact zone 9 provided, in which a good heat transfer between support plate 1 and mixing device 5 is guaranteed.

The mixing stream, not shown, flows through the throughflow 2 in this illustration from left to right. The cooling holes 3 are perpendicular to the plane of the drawing and perpendicular to the flow holes 2 ,

In the cooling holes are not shown heat pipes arranged such that a very good contact between the bore wall and the heat pipe is given. Also not shown is that the cooling holes after inserting the heat pipes tightly welded at the ends.

In the area of the contact zone 9 has the mixing device 5 Heat drainage channels 10 through which a cooling medium flows and that of the support plate 1 over the contact zone 9 into the mixing device 5 introduced heat removed.

In this way, can be in the support plate 1 also dissipate introduced amount of heat from the middle of the support plate in a simple manner, lower the mixing temperature and thereby increase the mass flow.

1

support plate

2

Durchströmbohrungen

3

cooling holes

4

outer edge of the support plate 1

5

mixing device

6

Throughflow of the mixing device 5

8th

Paragraph of the flow channel 6

9

Contact zone between support plate 1 and mixing device 5

10

Heat transfer channels in the mixing device 5

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102005019874 A1 [0003]

Claims (3)

Contraption ( 5 ) for the preparation of elastomer mixtures, the at least one sieve and at least one support plate ( 1 ), wherein the support plate ( 1 ) with its edge region ( 4 ) against the device ( 5 ), characterized in that the at least one support plate ( 1 ) arranged transversely to the flow direction of the mixture flow, through holes ( 3 ), in each of which at least one heat pipe is introduced and the ends are sealed, so that no mixture components can penetrate. Device according to claim 1, characterized in that the bores ( 3 ) of the support plate ( 1 ) have at least two heat pipes each. Apparatus according to claim 1 or 2, characterized in that the support plate ( 1 ) is formed of an aluminum material.