JPS5847247B2 - Bo Sen Mataha Obijyouzairiyo no Sink Shiyori - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seal and such a seal which makes it possible to continuously feed elongated material of constant cross-section, such as rod or wire, into zones under different pressures separated by walls. This invention relates to a device that uses

Such seals are required, for example, in equipment in which rods or wires are subjected to heat or coating treatments that must be carried out in continuous operation under vacuum.

In one form of the invention, a seal capable of supplying zones of a constant cross-section of material separated by one wall and under different pressures is mounted on spaced apart holders. It consists of a pair of die-shaped elements, a tube sealing between the holders, and a removable insert tightly mounted in the tube.

The dimensions of the die-shaped element are such that it provides a clearance of 0.1 to Q, 2 mm around the material fed through the seal.

With this arrangement, the seal has two die-shaped elements that conform to the circumferential shape of the material being fed into the vacuum zone and that provide a tight fit around the material.

Typically 0.12mm smaller than the diameter of the circular bar button and wire.
It's a large drawing die.

Preferably, the insert in the tube is cylindrical.

These materials need to be made from materials suitable for the specific conditions encountered.

The insert material must withstand the temperatures at which the wire or rod is heated.

The material of the insert must not abrade the material to be sorted and must have adequate abrasion resistance.

The insert may be made of plastic, such as nylon, if the material passing through the seal is at a low temperature, for example at a temperature of 0 to 120°C.

Alternatively, the seal may be made from a ceramic material such as uncalcined or partially calcined pyrophyllite if the material passing through the seal is at high temperature, or it may be made from asbestos such as 5yndanio. .

Such a Hiko insert should have a hole that fits tightly around the material fed through the seal and should have greater tolerances than the die-shaped element.

Typically, in the case of a circular frame or wire, the insard diameter may be one size larger than the diameter of the rod or wire.

However, by making such inserts very long and fitting tightly within the outer tube, very little air leakage through the device can be maintained.

When such a seal is used in a continuously evacuated vacuum device, the seal maintains leakage within the pumping capacity of the vacuum pump.

By using two such seals in series, the pump exhaust into the vacuum chamber can easily reduce the pressure to less than 1Nm-2 relative to the total pressure at the input end of the seal. admitted that it is easily possible to restrict passage.

If the same process is further added in such an arrangement, 10
It is possible to reach a vacuum pressure of the order of 1101N.

Similar seal arrangements may be used at the inlet and outlet of the vacuum chamber to allow a length of material to pass through the chamber.

Two or more seals may be used in series, with intermediate vacuum steps between successive seals.

The invention further provides a vacuum chamber, two in-line sealing devices and a device for moving the material through the vacuum chamber and the sealing device for vacuum processing of rod, wire or strip material of a constant cross-sectional area. Also includes equipment.

This sealing device includes at least one seal as described above and is arranged at the inlet and outlet of the rod, wire or strip of material.

Using the above arrangement, the material fed through the seal can be of any cross-section.

The shape of the die may simply be determined along the outer circumferential shape of the material.

Typically the material may be rod, wire or strip metal, such as transformer winding strip.

For example, a strip of material with a cross section of 50XIQnmi may be passed through the seal described above.

Preferably, the die holder is arranged so that the die-shaped element can be easily changed if it is desired to change the dimensions of the material passing through the seal.

Similarly, the inserts in the tube can be easily varied.

In order to clean the insert, it is advantageous to divide it axially along its length in the form of a cylinder.

The insert should provide sufficient clearance for the material being fed through the seal so as not to restrict the movement of the material and not wear or drag even when the material is fed through the equipment at fairly high speeds. It is necessary to have

The die-shaped elements not only severely restrict airflow;
Helps to keep the material being fed in the center position of the insert during the seal.

It also helps to stop vibrations caused by the equipment that moves the material through the seal.

Preferably, the die holder has a flange for fixing to the tubular flange.

One of the die holders may have a further flange for securing the die holder in the opening of the vacuum chamber.

FIG. 1 shows an apparatus for continuously processing wires, rods or other materials of constant cross-section through a vacuum chamber.

For example, this treatment is a thermal treatment using an electron beam or a coating using vapor deposition.

Processing using two or more steps is carried out in a vacuum chamber.

In some cases, the vacuum chamber may be divided into sections maintained at different atmospheric pressures.

The device has a processing chamber with an inlet and an outlet seal through which the material 7 to be treated is drawn by a wire winder 8.

The processing chamber 4 is connected to a vacuum pump 9 by a pipe 10.

When the processing chamber 4 is divided into a plurality of chambers, each compartment may be provided with a pump.

The entry seal button and exit seal may be the same.

Figure 2 shows end A where the wire enters open to the atmosphere;
A two-step RO seal 5 having an end C leading to a high vacuum chamber constituting a processing chamber 4 and connected to a pump 9 will be described.

In the middle B between the two sealing steps in FIG. 2, there is a small vacuum chamber 12 connected by a pipe 13 to a pump 14.

At the inlet end A, a die-shaped element 20 is mounted in a die holder 21, the die holder 21 having an end opening 22 for the inlet of the wire, and at the other end the die holder 21.
It has a flange 23 secured to a flange 24 on a tube 25 which is sealed therein.

The cross section of the die-shaped element 20 is a line passing through the vacuum chamber,
Shaped to correspond to the shape of a rod or other material.

It has the same structure as the conventional wire drawing die, but the 0.1
It is made larger by 0.2 mm.

In this particular example, the diameter is 0.127 nm larger than the circular wire or bar.

The element 20 has a parabolic cross-section along its axis so that it can be smoothly introduced into and exited from the zone of smallest cross-section.

The tube 25 contains a nylon cylindrical insert 26 with an axial bore 1 mm larger than the diameter of the wire.

The cylindrical insert 26 may be split along its length to facilitate cleaning.

The insert is tightly but removably mounted within tube 25.

Insert 26 extends along the entire length of tube 25.

At its end, the tube 25 extends into a holder 30 for the second die-shaped element 3 and is sealed.

Holder 30 has a flange 32 that mates with a flange 33 for tube 25.

The die-shaped element 31 is a parabolic die like the die-shaped element 20, and is larger than the line by 0.12 m71L.

The holder 30 is sealed against the chamber 12.

The second seal is similar to the first, with a tube 44 between the die housings and two die-shaped elements 40, 41 held in holders 42, 43.

This tube contains a cylindrical insert 45 (which may be split).

The second die housing is connected to the inlet 46 of the high vacuum chamber 11.
is sealed.

All die-shaped elements are removable from the holder;
It is replaceable.

A relatively long insert that is tightly fitted within the tube restricts the passage of air.

Typically, for a 6 mm diameter line, a seal assembly with two seals is about 1 m long.

In this particular arrangement, the chamber 12 between the two sealing stages can be continuously pumped to a pressure of about 50 ONm2.

The high vacuum chamber 11 can be maintained at a pressure of less than 1Nm2.

It is preferred to have a conical line guide to aid in the initial drawing of the line through the intermediate chamber 12 device.

If the wire is hot, the die holder and tube may be cooled with water.

This structure may be used for lines of any cross section.

For example, it may be used for lines of circular, square or rectangular cross section.

The die-shaped elements and inserts are made to correspond to the cross-sectional shape of the wire.

For rectangular cross-sections, for example in the case of metal strips used for winding of transformer cores, adjusting dies may be used as die-shaped elements.

The inserter 26j45 has sufficient tolerance to the wire so that it does not restrict the movement of the wire and does not wear or drag even when the wire is fed through the device at fairly high speeds.

The die-shaped elements 20, 31, 40, 41 not only provide a severe restriction to the air flow entering the vacuum chamber, but also serve to keep the line centered in the insert.

These elements also stop vibrations caused by the winder 8.

In one embodiment, a die-shaped element such as element 20.3
1 may be made of tungsten carbide mounted in a water-cooled brass holder.

Diamond dies may be used if water vapor is present, such as in an exit seal for copper wire annealing.

[Brief explanation of the drawing]

FIG. 1 shows the arrangement of a wire or rod vacuum processing device with a constant cross section. FIG. 2 is a sectional view of an air-vacuum seal unit that can also be used in the apparatus of FIG.

Claims (1)

[Claims] 1 Consisting of a pair of spaced apart die-shaped elements made of hard material having holes with a gap for the passage of rods or wires and a tapered inlet leading to the narrowest part, and which are capable of handling different pressure bands. In an apparatus having a seal for feeding a rod or wire of constant cross-section through a dividing wall, said die-shaped element has a transverse tapered inlet section leading smoothly through the narrowest section to the exit section. The surface is smoothly curved in a parabolic manner, the die-shaped element has a clearance of 0.1 to 0.2 mm around the material fed through the seal, and the die-shaped element has a clearance of 0.1 to 0.2 mm. between said die-shaped elements and a removable insert having a longitudinal hole for the passage of the rod or wire in the tube; , an apparatus for vacuum processing of rods or wires with a single electric cross section that enables continuous feeding of rods or wires at high speed.