JPH0416223A - Sealed pressurized kneading machine - Google Patents

Abstract

PURPOSE:To prevent pressure liq. from entering a kneading chamber and the kneading product from being mixed therewith by a method wherein a pressurized lid is provided with a liq. reservoir for receiving therein the pressure liq., leaking from a lift cylinder, and a suction nozzle is so positioned as to permit its insertion into the liq. reservoir when the pressurized lid is moved upwards to suck the pressure liq. CONSTITUTION:A recovery groove 41 for receiving therein the pressure liq. leaking from a seal member 20 is formed around a piston rod 21 on the upper surface of a seal holder 40, for retaining the seal member 20 at the top part of a pressurized lid 15, and a liq. reservoir 42 is also formed at the top part thereof in communication with the recovery groove through a passage 43. A suction nozzle 44 for sucking the pressure liq. from the liq. reservoir 42 is so positioned as to permit its insertion into the liq. reservoir 42, when the pressurized lid 15 is moved to its topmost position and connected through a solenoid valve 46 switchable between opening and closing position by a control part 45, and then, through a liq. separating tank 47 to a vacuum pump 48 to keep the interior of the tank normally negative in pressure by suction. In this way, the pressure liq., leaking from a lift cylinder 18 through the seal member 20, is automatically discharged to prevent the pressure liq. from entering a kneading chamber and the kneading product from being mixed therewith.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a closed press kneader used for kneading rubber, plastics, ceramics, etc.

[Prior Art] As this type of closed pressure kneading machine that has been used in practice, the one shown in FIG. 4 is known. In this system, a hopper frame 3 having a charging horn bar 4 for charging the mixing material on the side is installed upright in a kneading chamber having mixing blades 2 and 2 connected to a drive source (not shown), and the hopper frame 3 A pressurizing lid 5 for pressurizing the cross-conducting material is disposed vertically movably, and the pressurizing lid 5 is suspended from a piston rod 7 of a pneumatic cylinder device 6 provided at the top of the hopper frame 3. After charging the crosstalk material into the crosstalk chamber 1 from the input hopper 4 with the pressure lid 5 raised to the upper limit position shown, the pressure lid 5 is lowered as shown in FIG. 5 is pressed against the cross-wire material with a predetermined force, and the cross-wire material is kneaded by the cross-wire blades 2, 2.

However, in the above-mentioned conventional kneading machine, when the pressurizing lid 5 is moved up and down or when the cross-conducting material is pressurized, the powder of the cross-conducting material is ejected from the gap around the pressurizing lid 5 onto the upper part of the chuppah frame 3. However, there was a drawback that it was easy to deposit on the upper surface 5a of the pressurizing lid 5.

Therefore, it is necessary to sweep the crosstalk material powder deposited on the pressurizing lid 5 into the crosstalk chamber 1 at regular intervals, and to perform operations such that all the input materials are crossdissipated and manufactured into products, which is very troublesome. there were.

Therefore, the present inventor has developed a kneading machine that eliminates such drawbacks by forming a pressurizing lid long in the axial direction, thereby allowing the mixing material powder to pass through the gap around the pressurizing lid. The authors have proposed a method in which the powder is difficult to spray onto the upper part of the hopper frame, thereby preventing the cross-conducting material powder from accumulating on the pressurizing lid.

However, in the ia*ml of Improvement 1, a cylinder device for raising and lowering the pressurizing lid is formed inside the pressurizing lid, and a pressure liquid is used as the working fluid. It is possible that the pressurized liquid leaks through the seal part of the piston rod and flows into the kneading chamber, and if it gets mixed in with the mixed material, it will cause a big quality problem. Therefore, it is desirable to provide some means for recovering the leaked pressure liquid so that the leaked pressure liquid does not mix with the kneaded material.

[Problems to be Solved by the Invention] An object of the present invention is to provide a closed pressure kneading machine equipped with a recovery means for recovering the pressure fluid leaking from a hydraulic cylinder device.

[Means and effects for solving the problem] In order to solve the above problem, in the present invention, a hopper frame is installed upright in a mixing room equipped with a mixing blade, and a pressurizing lid is vertically movable in the hopper frame. In this device, the crosstalk material filled in the crosstalk chamber is pressurized using a core pressurizing lid before being crosstalked. The pressure means is constructed separately, and the hydraulic cylinder device constituting the elevating means is installed in an elevating cylinder formed on the pressurizing lid, a piston slidably housed in the elevating cylinder, and a hopper frame. It is composed of a piston rod that is vertically connected to the piston at its lower end, and the pressure lid is provided with a liquid reservoir for storing the pressure liquid leaking from the lifting cylinder, and the liquid reservoir is provided in the hopper frame. A suction bow nozzle for sucking the pressurized liquid is disposed at a position where the tip of the nozzle is inserted into the liquid reservoir when the pressurizing lid is raised to the upper limit position.

In the kneading machine having the above configuration, the pressurized liquid leaking from the elevating cylinder and flowing into the liquid reservoir is sucked by the suction nozzle and discharged to the outside when the pressurizing lid rises to the upper limit position during non-kneading. Therefore, the pressure liquid does not flow into the crosstalk chamber and mix with the crosstalk object.

In order to automatically perform suction of the pressurized liquid by the suction nozzle in synchronization with the upward movement of the pressurizing lid, the suction nozzle is
A vacuum pump is connected to a liquid separation tank that is constantly maintained at negative pressure via a solenoid valve! li, and a sensor is provided to detect when the pressurizing lid has risen to the upper limit position, and these sensors and a solenoid valve are connected to a control device that opens the solenoid valve in response to a pressurizing lid detection signal from the sensor. You can also do that.

Further, the pressure on the cross-conducting material by the pressurizing lid may be elastically applied, and for this reason, the pressurizing means is constituted by a pneumatic cylinder device, and the pneumatic cylinder device is disposed on the upper part of the hopper frame. It is desirable to connect the piston rod with the piston rod of the hydraulic cylinder device for lifting, or to install a buffer mechanism sealed with inert gas in the pressure fluid circuit, so that the pressure lid can be lowered. When the lower limit position is reached, the pressure fluid circuit valve may be opened to allow the buffer mechanism to function.

Furthermore, in order to prevent the crosstalk material powder from spouting out from the crosstalk chamber and depositing on the upper surface of the pressurizing lid, an opening of the input hopper that opens on the side of the hopper frame in the lowered position where the crosstalk material is pressurized is installed in the pressurizing lid. formed to a length that allows the part to be closed;
A sealing member may be provided on the inner surface of the hopper frame to slide into contact with the pressurizing lid to block crosstalk materials.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

In figure M1, 10 is the body of the kneading machine, 11 is a kneading chamber formed inside the body 10, and 12.12 is a pair of mixing blades rotatably arranged inside the mixing chamber 11. 1. These kneading blades 12.12 are driven and rotated by a drive source (not shown).

The body 10 is provided with a hopper frame 13 rising upward from the mixing chamber 11, and a charging hopper 14 for charging the mixing material is provided on the side surface of the lower end of the hopper frame 13, and an opening of the charging hopper 14 is provided. 14a
can be opened and closed by a door 14b, and a pressurizing lid 15 is disposed inside the hopper frame 13 so as to be movable up and down, and the pressurizing lid 15 is raised (see Fig. 1).
After charging a mixed wire material such as rubber, plastic, ceramic, etc. into the kneading chamber 11 from the input hopper 14, the pressure lid 15 is lowered (see Fig. 3), and the pressure lid 15 pressurizes the mixed wire material. Therefore, the mixed wire material is kneaded by the kneading blades 12, 12.

The elevating means for vertically moving the pressure M15 and the pressurizing means for elastically pressing against the crosstalk material are constructed separately from each other. In other words, the hydraulic cylinder device 17 with a large stroke, which constitutes the lifting means, is! $2 As can be seen from the figure, the lifting cylinder 18 formed on the pressurizing lid 15
A piston 19 is slidably housed in the lifting cylinder 18, and the hopper frame 13 is connected to the piston 19 at its lower end and slides in liquid-tight contact with the sealing member 20 of the pressurizing lid 15 at its upper end. On the other hand, a pneumatic cylinder device 25 with a small stroke constituting a pressurizing means includes a pressurizing cylinder 26 provided at the top of the hover frame 13 and a first piston rod 21 extending inward. A piston 27 is slidably housed in the pressure cylinder 26, and a second piston rod 28 is connected to the piston 27 at its upper end and extends into the hopper frame 13 through the partition wall 13a at its lower end. The first piston rod 21 and the second piston rod 28 are connected to a vibration universal joint 29 that absorbs vibrations.
are connected to each other by.

Thus, by forming the lifting cylinder 18 with a large stroke inside the pressure lid 15 housed in the hopper frame 13, the lifting cylinder 18 is formed separately from the pressure lid 15, and the upper end of the hopper frame 13 is This allows the height of the device to be significantly lower than that of a device mounted on a wall, thereby saving space. In addition, by configuring this elevating means as a hydraulic cylinder device, there are no economical problems caused by consuming a large amount of air, as would be the case when compressed air is used, and noise generation caused by air exhaust. There are also advantages to reducing the cylinder diameter.

The head chamber 18a and the mouth/entrance chamber 18b of the lifting cylinder 18 are connected to a switching valve: t2a,
32b to the pressure liquid source 33, and the switching valve 32a
, :12b, the pressurized liquid is alternately supplied and discharged, and the pressurizing lid 15 moves up and down by supplying and discharging the pressurized liquid. The pressurizing cylinder 26 also includes a head chamber 26a.
Pressurized air at a predetermined pressure is supplied to the unit, and this air pressure presses the pressurizing cover 15 against the cross-conducting material, and the compressibility of the air pressure causes the pressurizing cover 15 to rise and fall in response to the movement of the cross-conducting material. I'm going to become a shishi.

The pressurizing lid 15 is connected to the charging hopper 1 which opens at the side of the hopper frame 13 when it is in the lowered position as shown in FIG.
The horn bar opening 14a at 3 is formed on the inner surface of the main collar frame 13 and has a length that closes the opening 14a at 4.
A sealing member 3 that slides into contact with the pressurizing lid 15 is provided on the upper edge portion of the pressurizing lid 15.
5 is installed. Therefore, at the time of crosstalk, a very long gap 36 is formed between the pressure lid 15 and the hopper frame 13 along the pressure lid 15, and the gap 36 is formed between the pressure lid 15 and the hopper frame 13.
5 and the sealing member 35, the long gap 36 and the sealing member 35 close the crosstalk room 11.
Even if the material powder inside blows up into the gap 36, it will not enter the back pressure chamber 37 defined behind the pressure lid 15 and deposit on the upper surface of the pressure lid 15.

As shown in detail in FIG. 2, on the upper surface of the pressure lid 15, there is a seal presser 40 that holds the seal member 20.
Recovery groove 41 into which the pressure liquid leaking from the seal member 20 flows
Kaf! A liquid reservoir 42 is formed to surround the 141 piston rod 21 and adjacent to a part of the 1 recovery groove 41, and is communicated with the recovery groove 41 through the liquid reservoir 42 and the passage 43.

Further, inside the prepressure chamber 37, a suction nozzle 44 for sucking the pressurized liquid in the liquid reservoir 42 is arranged such that the tip of the nozzle is inserted into the liquid reservoir 42 when the pressure lid 15 is raised to the upper limit position. The suction nozzle 44 is connected to a liquid separation tank 47 via a solenoid valve 46 whose opening and closing are controlled by a control device 45. This liquid separation tank 47 is connected to a vacuum pump 48, and the vacuum pump 48 draws suction so that the inside of the tank is always in a negative pressure state. On the other hand, inside the back pressure chamber 37,
A sensor 49 such as a limit switch is provided to detect that the pressurization M15 has risen to the upper limit position.
9 is connected to the control device 45 described above. When the sensor 49 detects whether the pressure lid 15 has risen, the control device 45 that receives the detection signal opens the solenoid valve 46 so that the pressurized liquid in the liquid reservoir 42 is sucked into the suction nozzle 44. It has become.

The back pressure chamber 37 is also provided with an air supply nozzle 52 that communicates with a pressurized air source 51 such as a pressurized air blower, and an exhaust nozzle 54 that communicates with a collection g@53. At the same time, pressurized air is supplied from the air supply nozzle 52, and this pressurized air is maintained at a higher pressure than the back pressure chamber 37 or the kneading chamber 11, and flows into the back pressure chamber 37 through the seal member 35. The intrusion of crosstalk materials is prevented.

Note that during non-kneading, as the pressure lid 15 rises, the back pressure chamber 3
The pressurized air in the exhaust nozzle 54 is discharged to the dust collector 53, and the dust contained in the exhaust gas is collected in the dust collector 53.

On the lower surface of the body 10, there is an outlet 6 for removing the interfering material.
0, and can be opened and closed by a lid 62 that rotates around a shaft 61, and the lid 62 is opened and closed by an opening/closing actuator (not shown) attached to the body 10, and is locked when closed. It is designed to be locked by a cylinder 63.

When kneading mixed wire materials using the pressure kneading machine having the above configuration, first, as shown in FIG.
By supplying pressure liquid to the lot chamber 18b of 8 and discharging the pressure liquid in the head chamber 8a, the pressurizing lid 15 is raised, and the crosstalk material is supplied from the input hopper 14 into the crosstalk chamber 11. At this time, the lot chamber 26b of the pressurizing cylinder 26
The piston 27 is raised to the upper limit position by supplying pressurized air to the piston 27.

Next, as shown in FIG. 2, while the piston 27 is raised, pressurized fluid is supplied to the head chamber 18a of the lifting cylinder 18 to lower the pressurizing lid 15, closing the crosstalk chamber 11, and closing the crosstalk chamber 11. The pressurizing lid 15 is pressed onto the mixed wire material under high pressure using hydraulic pressure with the cushion not working, and initial kneading is performed for a while. By doing this kind of initial training,
The kneading effect is improved and the cycle time can be shortened by as much as 10 to 15%.

After the initial kneading is completed, the head chamber 26a of the pressurizing cylinder 26
The piston 27 is lowered by supplying pressurized air to the piston 27, and the hydraulic pressure of the lifting cylinder is adjusted as necessary to elastically press the pressurizing lid 15 against the crosstalk material by the air pressure of the pressurizing cylinder 26. Kneading is performed using the mixing blade 12. At this time, since the pressurized air is compressible, the pressurizing lid 15 repeatedly moves up and down in response to the movement of the materials, and this up-and-down action promotes good kneading of the materials.

When the pressurizing lid 15 moves up and down due to ups and downs, the air in the crosstalk chamber 11 flows between the pressurizing lid 15 and the hopper frame 13.
It is ejected into the gap 36 between the hopper frame 13 and sucked into the remixing chamber 11, and when it ejects, the crosstalk material powder is also ejected, but the sealing member 3 provided on the hopper frame 13
5 isolates the back pressure chamber 37 of the pressure lid 15 from the gap 36, so that the ejected powder does not enter the back pressure chamber 37 and accumulate on the top surface of the pressure lid 15. Moreover, since the pressurizing lid 15 is formed in a length that closes the opening 14a of the input hopper 14 that opens on the side surface of the hopper frame 13 in its lowered position, the gap 36 becomes longer in the vertical direction. While the ejected air flows along this gap 36, its pressure is rapidly attenuated due to frictional resistance, so that the material powder does not scatter to the outside from the input hopper 14, but falls halfway due to its own weight. When air is sucked in as the pressurizing lid 15 moves upward, the ejected powder is also sucked into the kneading chamber 1.

Furthermore, during the above-mentioned kneading, an air supply nozzle 52 is inserted into the back pressure chamber 37.
Since pressurized air is supplied from the pressurized air source 51 through the back pressure chamber 37 and the internal pressure of the back pressure chamber 37 is kept higher than that of the crosstalk chamber 11, there is no possibility that crosstalk material powder will enter the back pressure chamber 37 through the seal member 35. Definitely blocked.

When the mixing is completed, the lid 62 is opened by the opening/closing actuator, and the kneaded material is taken out from the outlet 60. Pressure liquid is supplied to the lot chamber 18b of the lifting cylinder 18, and the pressure liquid in the head chamber 8a is discharged, so that the pressurizing lid 15 is raised, and the next cross-contact material is charged from the input hopper 14. However, when the pressure lid 15 rises, the powder adhering to its side is scraped off by the seal member 35, and the air in the back pressure chamber 37 is exhausted through the exhaust nozzle 54 and collected by the m collector 53. The dust is separated and collected.

Further, the pressure liquid leaked from the lifting cylinder 18 through the seal member 20 flows into the recovery groove 41 and then into the liquid reservoir 42, but the pressurized lid 15 rises to the upper limit position shown in FIGS. 1 and 2. It is automatically excreted by this. That is, when the pressurizing lid 15 rises to the upper limit position, the tip of the suction nostle 44 is inserted into the liquid reservoir 42, and the rising is detected by the sensor 49, and the control device 45 controls the solenoid valve 46 based on the detection signal. To open the suction nozzle 44
is connected to a liquid separation tank 47 in a reduced pressure state, and the pressurized liquid in the liquid reservoir 42 is sucked by the suction nozzle 44 . Therefore, the pressure liquid does not flow into the kneading chamber 11 and mix into the kneaded material.

In the embodiments described above, a pneumatic cylinder device is used as a pressurizing means for pressing the pressurizing lid against the crosstalk material.
Instead of this pneumatic cylinder device, a buffer mechanism sealed with inert gas may be used. That is, the above-mentioned buffer mechanism is incorporated into the pressure fluid circuit that supplies pressure fluid to the hydraulic cylinder device 17, and when the pressure lid 15 is lowered and reaches the lower limit position, the pressure fluid circuit valve is opened and the buffer mechanism is activated. By configuring the pressure cover to function, the pressure cover can be elastically pressed against the crosstalk material. In this case, the piston rod 28 is vertically installed on the upper wall 13a of the hopper frame 13.

[Effects of the Invention] As described above, according to the sealed pressurized kneading machine of the present invention, the pressurized liquid leaking from the lifting cylinder and flowing into the liquid reservoir is removed from the pressurizing lid when it rises to the upper limit position during non-kneading. Since it can be sucked and discharged using a suction nozzle, the pressurized liquid does not flow into the kneading chamber and mix into the kneaded material.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an embodiment of the closed pressure kneading machine according to the present invention in a non-cross-wired state, Fig. 2 is an enlarged view of its main parts, and Fig. 3
4 is a cross-sectional view of a conventional hermetic pressure kneading machine in a non-cross-wire state, and FIG. 5 is a cross-sectional view of the conventional closed-pressure kneading machine in a cross-wire state. 11. Kneading chamber, 12. Kneading blade, 13.
・Hopper frame, 14...Input hopper, 14a...Opening, 15
・・Pressure lid, 17・・Hydraulic pressure shisonta device, 18・・lifting cylinder, 19・・piston 21・・
Piston rod 25...Pneumatic pressure device, 28...Piston rod, 35...Seal member 42...
Liquid reservoir, 44...Suction nozzle, 45...Control device, 45...Solenoid valve, 47...Liquid separation tank 48...Vacuum bomb 49...Sensor. (1 other person) - Figure

Claims (1)

[Claims] 1. A hopper frame is set up in a kneading chamber equipped with kneading blades, a pressurizing lid is disposed within the hopper frame so as to be movable up and down, and the mixed material filled in the kneading chamber is In a device in which kneading is performed while applying pressure with a pressurizing lid, a lifting means for moving the pressurizing lid up and down and a pressurizing means for elastically pressing against the mixed material are constructed separately, and a hydraulic cylinder constituting the lifting means is provided. The device is operated by an elevating cylinder formed on the pressurizing lid, a piston slidably housed within the elevating cylinder, and a piston rod that is vertically disposed within the hopper frame and whose lower end is connected to the piston. The pressurizing lid is provided with a liquid reservoir for storing the pressurized liquid leaking from the lifting cylinder, and a suction nozzle for sucking the pressurized liquid in the liquid reservoir is placed in the hopper frame at the upper limit position of the pressurizing lid. A closed pressure kneading machine characterized in that the nozzle tip is arranged at a position where the tip of the nozzle is inserted into a liquid reservoir when the kneading machine rises to a certain level. 2. In the sealed pressure kneading machine according to claim 1, the suction nozzle is connected to the liquid separation tank which is constantly maintained at negative pressure by a vacuum pump via a solenoid valve, and the pressure lid is moved to the upper limit position. A sensor is provided to detect the rise, and these sensors and a solenoid valve are connected to a control device that opens the solenoid valve in response to a pressure lid detection signal from the sensor. 3. In the closed pressure kneading machine according to claim 1 or 2,
The pressurizing means consists of a pneumatic cylinder device provided at the upper part of the hopper frame, and the piston rod of the pneumatic cylinder device for pressurizing and the piston rod of the hydraulic cylinder device for lifting and lowering are connected to each other. 4. In the closed pressure kneading machine according to claim 1 or 2,
The pressurizing means consists of an inert gas-sealed buffer mechanism built into the pressure fluid supply circuit. 5. In the closed pressure kneading machine according to any one of claims 1 to 4, the pressure lid has a length that can close the opening of the input hopper that opens on the side of the hopper frame in the lowered position where the kneaded material is pressurized. A sealing member is provided on the inner surface of the hopper frame to make sliding contact with the pressurizing lid to shut off crosstalk materials.