JPS60183112A - Deburring of part and device for removing lacquer layer of part - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for deburring and deburring parts of elastic materials having a device for receiving the parts and passing the parts through the injection (sub-injection area) of a centrifugal rotating body and a device for embrittling the parts with a cryogenic liquid. Apparatus for mechanically removing lacquer layers from parts made of rubber or synthetic materials that have become brittle due to low temperatures, or from individual parts, using the principle of a centrifugal rotor. is known, in which the part to be deburred or the part to be stripped of the lacquer layer is embrittled by direct heat exchange with a refrigerant, and the embrittled part is transferred to a rotating drum, a trellis-shaped drum or a -1 inclined drum. The lacquer is removed by being rotated in a dish-shaped rotating body and collided with the ejection moon by a centrifugal rotating body to remove the lacquer.

In the known apparatus, if large, bulky or cold and fragile parts, such as gas masks, are to be delaminated or, for example, a layer of lacquer is to be removed, these parts are pre-treated with This means that it may be destroyed by rotation or other damage may occur before complete deburring or further lacquer removal has been completed. Furthermore, it has been found that such parts are often not completely stripped or lacquered in known devices.

This is because during rotation, in some cases, the entire surface of many parts may not be completely exposed to the ejection and abrasion of the centrifugal rotor.

Therefore, mechanical deburring or further removal of lacquer on large parts was sometimes impossible.

Devices of the type mentioned at the outset are also known, in which the objects to be skimmed or lacquered and dusted are mounted on a transfer device or conveyor and transported individually to the jetting range of a centrifugal rotor. However, such equipment is extremely expensive and requires two or more centrifugal rotors placed one behind the other in the direction of movement of the conveyor, and two or more centrifugal rotors that are offset in height from each other. They are arranged vertically. The injection material is inefficiently injected in a substantially vertical plane.

It is therefore an object of the present invention to provide a structure in which comparatively large bulky or fragile parts can be removed completely and with less waste, or even subjected to lacquer removal, in an economical manner. The objective is to provide a device that is as simple and compact as possible.

The above-mentioned object is achieved by the present invention, in which a centrifugal rotating body is fixed to a drive shaft formed as a hollow shaft and rotatably supported in a suspended state, and a fixed tube is disposed within the hollow shaft, The invention is solved by connecting the storage container of the injection 42 with the injection material charge of the centrifugal rotor through the interior of the tube. In this case, the injection material is supplied. As a result, the storage container of the injection mill can be arranged, for example, directly on the hollow shaft, without the need for a propulsion line connecting the storage container to the injection material input of the centrifugal rotor. The device according to the invention is therefore simple and compact. If the injection material is introduced directly into the hollow shaft, the injection molding 11 is pressed against the inner wall of the hollow shaft by centrifugal force. The present invention provides a simple and surprisingly effective device to counteract this undesirable effect, in which the penetration of the injection beam by pressure against the wall is minimized or even impossible. It has become. That is, a fixed tube is disposed within the hollow shaft, and this fixed tube connects the injection container to the injection material charging section of the centrifugal rotating body without rotating along with the rotational movement of the hollow tube. The injection moon passes through the inside of this fixed tube and hits the wall without any obstruction.
You can move freely without having to wear ff1. These features of the invention make it possible to remove dust 9 or lacquer even more economically, since the injection material is uniformly distributed in large quantities over the parts to be processed. The time during which the parts undergo ejection can therefore be minimized, and in the device according to the invention a large supply capacity can be given to the individual parts. According to a further feature, the centrifugal rotor t/'i is suspended/supported in a floating state eζ, which is advantageous for the following reasons.

That is, the parts processed by the apparatus according to the invention are cooled to low temperatures by means of a low-temperature refrigerant.

The temperature inside the deburring room is also extremely low. Due to the suspension and floating support of the centrifugal rotor, the drive device can be located outside the deburring chamber and is thus protected from the effects of cold temperatures and isolated from the injection material. be.

By supporting the suspended and floating state of the Iff IL11 rolling body, the space below the centrifugal rotating body is further freed, and no structure is placed on the F side of the centrifugal rotating body that obstructs the annual income and re-standardization (+fii) of the injection interest. It is.

In an advantageous embodiment of the invention, the centrifugal rotor is subjected to vertical oscillations by means of a drive, and a second tube connected to the storage container extends into the stationary tube, and this tube is connected to the stationary tube. It is made movable relative to the other.

Since the centrifugal rotor can vibrate in the vertical direction, the vertical injection range can be expanded depending on the application, and in this respect it is advantageous for the centrifugal rotor to be supported in a suspended floating state. It has been proven. This is because in this way the necessary free space for vibration is provided below the centrifugal rotor. In this variant embodiment, supplying the injection gain to the fixed tube of 1/month < 11 of the hollow shaft is to () to the fixed tube.

In this configuration, the storage container is not vibrated during the vibrations of the centrifugal rotor, and is not vibrated in the fixed tube. This ensures a reliable introduction of the injection material into the tube, which is mostly sectioned in such a way that the two tube sections can be inserted into and out of each other. The centrifugal rotor is fixed with the container and can be moved up and down.The deflection of the supplied injection angle from the vertical to the horizontal direction can be achieved by incorporating a suitable embodiment of the centrifugal rotor, for example a cone. done advantageously.

The introduction of the injection angle into the rotating hollow shaft is forced by a further advantageous embodiment of the device according to the invention, for example by means of a single-volume propulsion screw.

In this way, it is ensured that an even, particularly large amount of injection angle per unit time can be supplied to the centrifugal rotor.

In embodiment B, for example, several cubic meters of synthetic material granules can be introduced into the centrifugal body per hour at a rotational speed of the centrifugal body greater than 1000 revolutions/min.
This embodiment allows particularly economical operation. In a further configuration, a stirring device is arranged in the storage container of the device according to the invention. This stirring device prevents the injection angles from joining together. The cooled injection angle may freeze after being returned from the deburring chamber into the storage vessel and may therefore become bonded to walls or other injection angle bodies within the storage vessel.

An agitation device in which a forced propulsion device, that is, a propelling screw, is arranged coaxially with the hollow shaft inside the drive shaft of the agitation device, which is formed as a hollow shaft, and each drive shaft is connected to a respective drive device. The particularly compact arrangement and mutually independent drives of the forced propulsion device and the forced propulsion device make the configuration particularly suitable for the purposes of the present invention. It can be rotated at a small number of rotations per hit.

Since the drives of both devices a are independent, the rotational speed can be adjusted individually.

In a particularly advantageous variant of the invention, a forced propulsion device (
The output [1 An embodiment of the deburring device according to the invention is described below with reference to the accompanying drawing, in which the amount of passage of the exit angle through the lacquer can be adjusted. Similarly, by changing the separation device of
According to the invention, the parts to be deburred or delacquered are individually suspended from a transfer device or conveyor,
It is propelled by a conveyor to the injection angle injection range. In this case, the conveyor is arranged with respect to the centrifugal rotor so that the parts move around the centrifugal rotor in a horizontal plane by approximately 360°.Since the injection angle of the centrifugal rotor is 360', The part undergoes injection with a maximum long time injection angle, up to 360° injection angle, in short, the part is propelled 11
In this embodiment, for example, the gas mask is deburred, the device is Substantially, the introduction cylinder 1,
It consists of a deburring room 2 and a working station 3 where the masks to be deburred are suspended on a conveyor and where the deburred masks are removed again, the conveyor having a chain drive 5 with adjustable speed. It is a suspended track. The part 11 to be deburred is itself rotatably supported by a bar 4
A conduit 47 with a control valve 48 and a solenoid valve 49 for the low temperature refrigerant, in this example liquefied nitrogen, is suspended in the deburring system and the cooling and embrittling device is shown in FIG. He is led into room 2. A large number of nozzles 50 are arranged in the burr chamber 2 in accordance with the shape of the part to be burred.

The parts become brittle through direct heat exchange with the liquid nitrogen injected onto them. During the heat exchange, the liquefied nitrogen evaporates, and this low-temperature gaseous nitrogen flows into the introduction tube 1 and precools the part 11 to be deburred.

The conveyor is supported by a guide device 23 in the dust collecting chamber 2, and a centrifugal rotating body 7 is disposed in the dust collecting chamber 2.
The injection material is supplied to this centrifugal rotating body from above from an injection material tank or storage container 10. The centrifugal rotor 7 is suspended and supported in a floating state, and rotated by a centrifugal rotor drive device.

In this embodiment, the suspension track is guided at a substantially constant distance around the rotation of the centrifugal rotor 7, so that the part 11 is guided into the removal chamber 2.
It moves in a generally circular path at a constant distance from the centrifugal rotating body 7.

On this circular path, the parts are accelerated and injected from the centrifugal rotating body, and the injection rate collides with them, causing them to be scraped off.In order to optimize the scraping process, the parts are After the part has been deburred, which is rotated around a vertical bar 4 during impact, it is ejected from the deburring chamber 2 and removed from the suspension track. For economical reasons, the introduction tube 1 and the intake chamber 2 are thermally insulated 22.

The inlet and outlet openings are each provided with a gas cutoff 18 .

The used injection material and the removed streamer fall into the trapping wave body 14 and are led to the vibrating sieve 8, which separates the used injection material from the rubber band 9. . Subsequently, the injection material is introduced into the injection material storage container 10 by means of a conveyor (13) or by one or more flexible propulsion screws. The area of the vibrating screen 8 and the head area of the bucket conveyor are separated by a device 9. The dust removal device 9 is connected to a filter chamber 17 via a suction pipe 16 for this purpose. The device further includes a blocking plate in which a drive device 20 for the agitation device of the storage container and a container 15 for receiving the removed shavings are arranged to block the inlet and outlet openings of the 9 chambers 20 for collecting from the injection system. 19, the injection material can enter into the introduction cylinder 1 and the discharge cylinder 51. In order to collect such injection bodies, a vibration propulsion device, that is, a vibration conveyor 6 is arranged in both cylinders, and these The vibrating conveyor was designed to transfer the injection material to the deburring chamber 2, e.g. the catch basin 14.In order to protect it from the influence of low temperatures, the vibrating conveyor was designed to transfer the injection material to the deburring chamber 2 or the introduction tube as much as possible to protect it from the effects of low temperatures. The DJ moving parts in this chamber are equipped with a side 1 thermal sleeve, with pneumatically actuated cylinders and bearings mounted on the outside of the chamber.

A liquid nitrogen injection device is provided in the deburring chamber in order to keep the rubber burrs cooled as well.

A further alternative embodiment of the injection injection introduction and centrifugal rotor drive device is shown in FIG. Since the part 11 revolves around the centrifugal rotor 7 in a horizontal plane, the maximum weight of the part to be removed is limited by Ill of the centrifugal rotor 7. If the part is larger than the height of the centrifugal rotating body 7, the centrifugal rotating body 7 can vibrate vertically so that the part can be scraped off, so that the entire height of the part is alternately affected by the injection gain. For this purpose, the centrifugal rotor 7 is supported in a suspended floating state outside the deburring chamber. The drive shaft is designed as a hollow shaft through which the injection power is supplied to the centrifugal rotary body 7.

The introduction of the injection material into the hollow shaft takes place via a filling container 25 which is connected to the injection container 10 by a rubber tube 26 .

The belt drive (only the wedge belt 29, the wedge belt breech 32 and the drive housing 28 are shown in the drawing), the drive motor 12 and the filling container 25 are mounted on a support frame 39 and mounted on this support. Frame 39 is 1
It is moved up and down by one or more pneumatically actuated cylinders 27, thereby causing the centrifugal rotor 7 to perform a corresponding movement. The hollow shaft 24 is a double-row roller bearing, with 30 denoting the backing, 35 denoting the funnel for introducing the injection nozzle inside the hollow shaft, and 36 denoting the rubber ring backing sealing the funnel 35. 31 and a clamping ring 34 in a thrust conical roller bearing 33. The pneumatically actuated cylinder 27 is supported on a fixed support 37. A 111II thermal sleeve 38 is located between the hollow shaft 24 and the insulator 22.
is placed, morphism 11, f 4'A' 61 Kl
'The cone 41 in the area of the feed section of the centrifugal rotor 7, which is forcibly supplied to the centrifugal rotor 7 through the hollow shaft rotated by the advancing screw 40, is provided to deflect the injection control in the horizontal direction. There is.

The advantage of this embodiment is firstly that the centrifugal rotor drive and the transmission are arranged outside the injection range and the cold section, which significantly reduces the possibility of failures occurring. . This variant of the centrifugal rotor drive and injection material introduction device is also possible if no vibration of the centrifugal rotor is required; FIG. 5 shows the introduction of injection material through a driven hollow shaft according to the invention. The device is schematically shown in which a tube 42 is arranged inside a rotating hollow shaft 24 and is fixed 43 at the top of a transmission housing 28 on the outside of the hollow shaft, the injection tube being drawn from a storage container lO. It is supplied to the centrifugal rotor through the flexible pipe 26 and the pipe 42. This ensures an unimpeded supply of It 1.l and avoids the drawbacks of stiffness of the injection tube to the wall caused by centrifugal forces when introducing the index tube through the rotating hollow shaft 24.

In FIG. 6, another embodiment of the injection profit supply device according to the invention is shown, together with a hollow shaft 24 serving as a drive shaft of the centrifugal rotor 7 and a fixed tube 42, a further embodiment for the supply of injection profit. A tube 44 serves, which tube 44 is fixedly connected to a storage container 10, which is not shown in this figure but lies directly on the upper edge of the tube 44 (see FIG. 7). t, tube 44 has a smaller diameter than tube 42 and always projects into tube 42. When hollow shaft 24 and tube 42 oscillate vertically, tube 44 remains stationary. (I'i) This is because the tube 44 is movable relative to the tube 42.

In FIG. 7, a modification of the injection material introducing device shown in FIG. 6 is shown. The storage container 10 has a conically shaped tube 4 in the area of the outlet 45 and is tightly connected to the storage container.
It opens at 4. A stirring device 4 is provided inside the storage container 10.
6 and a proportionate propulsion screw 40 are arranged, the propulsion screw 40 is connected to a drive device 53 via a shaft 52.
The stirring device 40 is driven by the drive device 20 via a shaft 54, both shafts 52 and 54 being arranged coaxially with each other, the shaft 54 being formed as a hollow shaft and the shaft 52 being driven by the drive device 20 via a shaft 54. This arrangement, which is arranged internally, allows the stirring device 46 to rotate at a different rotational speed than the four-volume propulsion screw 40. The agitation device 46 serves to rotate and release the injection material within the storage container 10 and prevent the injection material from sticking together. On the other hand, the ejection control
The metering propulsion screw 40, which is propelled through 4 and 42 into the supply of the centrifugal rotor 7, must rotate at a much higher speed. that the residence time of the parts can be adjusted by a stepless rotation speed control device of the drive device for the conveyor;
The low-temperature brittle parts are directed to the injection material and can be evenly injected with the injection material without being subjected to any other mechanical loads, thereby eliminating waste. Accordingly, according to the invention, large, irregularly shaped and/or cold-fractured parts that are prone to cracking can also be scraped out and a good layer of lacquer can be removed over the entire surface, thus making it possible to remove the lacquer layer from the entire surface. is completely stripped and the lacquer layer removed.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of a device according to the invention. 2 is a partially sectional plan view of FIG. 1, and FIG. 3 is a partially sectional side view of FIG. FIG. 4 is a partially sectional side view of an apparatus having a vibrating centrifugal rotating body according to the present invention, and FIG. 5 is a partially sectional side view of a modified form of the injection material introducing device. FIG. 6 is a partial sectional view of yet another variant of the injection material introduction device, and FIG. 7 is a sectional view of an embodiment of the storage container. 1......Introduction tube 2...Base removal 9 chambers 3...Working area 4...... Noku -5・・・・・・
... Chain drive device 6 ... Vibration propulsion device, vibrating conveyor 7 ... Centrifugal rotating body 8 ... Vibrating sieve 9 ... ......Dust removal device 10...Storage container 11...Parts 12...Drive motor 13... ...Bucket conveyor -14...
...... Capturing beneficial body 15 ... Container 17 ...... Filter chamber 18 ... Gas cutoff section 20 ... ..... Drive device 24 ..... Hollow shaft 27 ..... Pneumatically actuated cylinder 40 ...
・・・・・・1 quantity propulsion screw 42・・・・・・
...Fixed tube 44...Pipe 46...Agitator 50...Nozzle 51...Discharge Cylindrical patent applicant! I'li of Rude Akchengesernjaft drawings! :(White 1, No change to ゛Ft'g, 1 75 Ft'g, 3 17 Fig, 6 1, Matter 1'l's hand, 1981 Q-'1 Application No. 037197 2, Title of the invention Parts removal device and part lacquer layer removal device 3;
+Name of the person who will stop rli Name: Linda Akchengesellschaft 1974 ■'May 290

Claims (6)

[Claims] (1) In an apparatus for stripping parts of elastic particles and removing a layer of lacquer from parts, which has a device for receiving parts and passing them through the injection range of a centrifugal rotating body, and a device for embrittling the parts with a low-temperature liquid, The centrifugal rotating body (7) is fixed to a drive shaft (24) formed as a hollow shaft and rotatably supported in a suspended floating state, and a fixed tube (42) is disposed within the hollow shaft. The part is scraped off and the lacquer layer is removed from the part, with the injection paulownia (10) storage container being connected to the injection material charging part of the centrifugal rotor (7) through the interior of the container. Device. (2) The centrifugal rotating body (7) is caused to vibrate in the vertical direction by a driving device, and a second tube (42) is fixedly connected to the storage container (10) in the fixed tube (42). 44) has invaded, and the second tube has entered the fixed tube (
42), the device according to claim 1, wherein the device is movable relative to (3) A cone (41) is arranged in the range of the injection material charging section 16 of the centrifugal rotating body (7) to deflect the injection gain from the vertical introduction device to the horizontal injection device. (Which of Claims 1 or 2) 1
Equipment described in Section. (4) Forced propulsion device for supplying injection material (lO) from the storage container (10) to the fixed pipe (42)*: ,4
The device according to any one of claims 1 to 3, characterized in that it has a metering helical propulsion device (40) in the ``r''. (5) Insert a stirring bag [(46) into the storage container (10).
Claim 4 is characterized in that
Apparatus described in section. (6) A drive device (52) of the forced propulsion device (40) is installed coaxially with the hollow shaft (54) inside the drive shaft (54) formed as a hollow shaft of the stirring bag fi & (46). The device according to claim 5, characterized in that the drive shafts (52, 54) are arranged and connected to the drive device (20, 53), respectively, (7) of the forced propulsion device. A drive shaft (52) is vertically movable relative to which the storage container (10) is movable.
7. Device according to claim 6, characterized in that a stop (55) is arranged in the area of the conical outlet (45) of the injected material for determining the throughput of the injection material.