JP2760931B2 - Kneading machine with liquid injection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kneading machine with a liquid injection mechanism for mixing and stirring a plastic material such as a resin material and injecting a liquid from a liquid supply section.

[0002]

2. Description of the Related Art A kneader of this type with a liquid injection mechanism is disclosed in
Described in -7637 JP etc., FIG ones that conventional
5, shown in FIG. 6, wherein 1 is a cylindrical casing having a cross section where two circles having the same diameter and having a supply port 2 at one upper end and a discharge port 3 at the other lower end cross each other. Rotating shafts 4 and 5 are provided in parallel within one circle, and a large number of kneading and stirring blades 6 and 7 are incorporated in the axial direction of the rotating shafts 4 and 5 to be integrated .

The kneading and stirring blades 6 and 7 are of a combination of various shapes, and the material (for example, granular powder and binder) supplied from the supply port 2 is sent to the discharge port 3 while kneading and stirring. A part that functions, a part that only performs kneading, and a part that returns while performing kneading are configured. The supplied material is sufficiently kneaded and agitated and discharged from the discharge port 3.

A motor 10 is connected to the rotating shaft 4 via a speed reducer 11. The other rotating shaft 5 is connected to the speed reducer 1
Linked via 1. Reference numeral 12 denotes a heating / cooling jacket.

[0005] Reference numeral 13 denotes a cylindrical liquid supply unit which narrows a tip end opening into the casing 1 as shown in FIG. 6 to form a nozzle 14, and injects the liquid into the casing 1 at a high pressure. This liquid is a liquid such as a plasticizer to be added to the raw material to be kneaded and stirred in the casing 1, and includes, for example, pastes and slurries such as water, oil, solvent, alcohol, and molten resin.

Further, even if the raw material (powder, solid, paste, etc.) in the casing 1 attempts to flow into the liquid supply unit 13, the nozzle 14 is prevented from being blocked because the pressure in the liquid supply unit 13 is high. .

[0007]

While the high-pressure liquid is being injected into the casing 1 from the liquid supply unit 13 as described above, the liquid supply unit 13 is prevented from being blocked, but if the injection of the liquid is stopped. The raw material in the casing 1 flows from the nozzle 14 into the liquid supply unit 13 and adheres and is closed. For this reason, there is a problem that the liquid supply unit 13 needs to be detachable and always cleaned.

An object of the present invention is to provide a kneading machine with a liquid injection mechanism having a mechanism for preventing a liquid injection port from being closed, in order to solve the above-mentioned problem.

[0009]

According to a first aspect of the present invention, a pair of parallel kneading and stirring blades are rotatably disposed in a casing, and the casing is provided with the kneading and stirring blades. in pouring kneader with mechanisms provided with a liquid supply unit for supplying a liquid into the casing, to the liquid supply portion, a valve body for opening and closing the liquid inlet, the valve body, in the closing direction of the liquid inlet A spring means for urging , and an air cylinder for moving the valve body in the opening direction of the liquid inlet in response to the spring means by being supplied with air. When the injection port is closed, the injection port is fitted into the liquid injection port so that the tip projects from the liquid injection port toward the kneading and stirring blade.

[0010] The invention according to claim 2 is the above-described claim 1.
In the invention, the functions of the air cylinder and the spring means are reversed.
It is a thing. That is, supply air to the air cylinder
Moves the valve body in the closing direction of the liquid inlet, and
Thus, the valve body is biased in the opening direction.

[0011] The invention of claim 3 provides the above-mentioned claim 1 or 2.
In the above invention, the pressure for detecting the pressure in the liquid inlet is
Force detection means, and the pressure detected by this pressure detection means
When more than a set value indicating the closed state of the injection hole, the
The valve is inserted into the liquid inlet.
It is.

[0012]

[Action] Since this invention is the above-described configuration, when the injection of the liquid opens the liquid inlet of the liquid supply unit to retract the valve body by the action of the spring means or air cylinder, casing pressure liquid from here Inject into.

When the injection of the liquid is stopped, the valve body is advanced by the action of the spring means or the air cylinder to close the liquid injection port. At this time, since the valve body tip protrudes fitted to the liquid inlet of the kneaded material in the casing the liquid inlet in
Blockage due to inflow into the pipe is reliably prevented.

In the case where the pressure detecting means is provided, when the liquid injection port is closed by the kneaded material for some reason, the detecting means detects the closed state and supplies or exhausts air to the air cylinder. The body moves, and its tip fits into the liquid inlet and protrudes. By this insertion, the liquid
The kneaded material is extruded, and the clogging of the liquid inlet is eliminated.
If the pressure is eliminated, the detected pressure becomes equal to or lower than the set pressure, so that the valve body moves to open the liquid inlet, and the liquid injection is continued.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The overall structure of a kneader is the same as that of the conventional example shown in FIG. 5, and therefore the description thereof will be omitted, and FIGS. 1 to 4 showing a liquid injection mechanism will be described.

FIG. 1 shows a first embodiment, in which reference numeral 21 denotes a cylindrical liquid supply unit integral with a casing, and reference numeral 22 denotes a hollow support unit connected to the liquid supply unit 21 by a flange.

A cylindrical bonnet 23 is fixed to the upper end of the support portion 22, and an air cylinder 25 is fixed thereon via a plurality of bolts 24 . The air cylinder 25
The sliding portion 27 connected to the lower end of the piston rod 26 reaches the inside of the support portion 22 via the inside of the bonnet 23, and a front portion thereof is a small diameter portion 28.

Then, the tip of the small diameter portion 28 is connected to the valve body 29.
The distal end of the liquid supply unit 21 is squeezed to provide a liquid inlet 30 that is opened and closed by the valve body 29. The valve element 29 is shown in FIG.
When the liquid inlet 30 is closed,
And the tip protrudes from the liquid inlet 30.
ing.

In the bonnet 23, the sliding portion 2
7, the seat plate 31 is fixed to the seat plate 31 and the bonnet 23.
A spring 33 that pushes down the seat plate 31 is mounted between spring supports 32 provided at the upper end inside.

In the middle of the liquid supply section 21, a liquid supply port 34 is provided.
The liquid supply port 34 is connected to the injection chamber 3 in the liquid supply section 21.
5 Ru communicates with the liquid inlet 30 through. The liquid supply port 34
A pressure detecting means 37 is provided in the middle of the supply pipe 36 connected to the pressure sensor.

[0021] supplies in this embodiment 1, when injecting the liquid, first the supply and exhaust port 20 at the bottom of the air cylinder 25 the air of a predetermined pressure. Thereby the piston rod 26 as shown in FIG. 1 is increased with the sliding portion 27 to compress the spring 33, Ru is increased diameter portion 28, the valve element 29 at the lower end at the same time. As the valve body 29 rises, the liquid inlet 30 is opened as shown in FIG. 2, and the liquid supply port 34 communicates with the inside of the casing 1 via the inlet chamber 35.

In this state, the liquid from the liquid storage tank (not shown) is supplied to the supply pipe 36 and the liquid supply port 3 by pressurizing the pump.
Then, the mixture is supplied to the injection chamber 35 through the step 4. The liquid that has entered the injection chamber 35 flows into the casing 1 from the liquid injection port 30.

[0023] When stopping the supply of the liquid, you exhaust at the bottom of the air liquid air cylinder 25 at the same time to stop the supply to the supply pipe 36. Thereby , the restoring force of the spring 33 (attached)
3 ) , the piston rod 26 and the like descend, and the valve body 29 is fitted into the liquid inlet 30 and closed as shown in FIG.
You. Therefore , even if the kneading and stirring blades 6 and 7 in the casing 1 rotate, the inflow of the raw material in the casing 1 to the liquid injection port 30 is avoided.

In this embodiment, the pushing strength of the valve body 29 can be adjusted by appropriately setting the strength of the spring 33.

In addition, the raw material closes the liquid injection port 30 for some reason during the above-mentioned injection, so that the injection chamber 3
When the pressure in the air cylinder 25 rises and the pressure detecting means 37 detects that the pressure exceeds the set value, the air under the air cylinder 25 is discharged for a short time by the signal of the detecting means.

For this reason, the spring 33 acts to lower the piston rod 26 and the like, and the valve body 29 at the lower end moves the liquid inlet 3
0 and push back the clogged raw material. This effect is instantaneous, so once the clog is removed,
The piston rod 26 rises and returns, and returns to the normal liquid supply state.

FIG. 4 shows a second embodiment. A spring receiver 32 is provided at the lower end of a bonnet 23, and a seat plate 31 fixed to an upper portion of a sliding portion 27 is pushed up by a spring 33. The second embodiment operates in a manner opposite to that of the first embodiment. The other structure is the same as that of the embodiment shown in FIG.

In this embodiment, when the liquid is injected, the air in the air cylinder 25 is exhausted from the air supply / exhaust port 20 at the upper end.
6, the sliding portion 27, the small diameter portion 28, etc., rise, the valve body 29 at the lower end rises, the liquid inlet 30 is opened, and the liquid supplied from the supply pipe 36 enters the casing 1 from the liquid inlet 30. Supplied.

When the supply of the liquid is stopped, air at a predetermined pressure is supplied to the upper part of the air cylinder 25. As a result, the piston rod 26 compresses the spring 33 and descends, and at the same time, the sliding portion 27 and the small diameter portion 28 descend, and the valve body 29 at the lower end closes the liquid inlet 30.

In the case of this embodiment, the pushing strength and speed of the valve element 29 can be adjusted by appropriately setting the pressure and flow rate of the air supplied to the air cylinder 25.

Also, the raw material closes the liquid injection port 30 for some reason during the above liquid injection, so that the injection chamber 3
When the pressure detecting means 37 detects that the pressure in 5 has risen and the value has exceeded a set value, air is sent to the upper part of the air cylinder 25 for a short time by the signal of this detecting means.

Therefore, the piston rod 26 and the like compress the spring 33 and descend, and the valve body 29 at the lower end moves to the liquid inlet 30.
And push back the clogged raw material. This effect is instantaneously performed, after the jamming is removed, pin
The ston rod 26 and the like rise and return to return to the normal liquid supply state.

Each of the above-mentioned embodiments can be applied to either a case where the liquid is temporarily or intermittently supplied or stopped during the mixing and kneading process of the raw materials, or a case where the liquid is continuously supplied.

In each of the above embodiments, the liquid supply section 21 is provided on the upper side of the casing 1, but may be provided on the lower side.

[0035]

According to the present invention, the liquid injection port provided in the casing of the kneader can be freely opened and closed by the fitting of a valve body operated by an air cylinder and a spring, as is apparent from the above description of the structure and operation. By closing the liquid inlet at the time of stopping the liquid injection, the raw material is prevented from flowing into and closing the liquid inlet.

In particular, since the liquid injection port is closed after the supply of the raw material to the kneader and the injection of the liquid are stopped, the drive power of the kneader is turned off, and then the kneading agitating blade which rotates for a while due to the inertial force turns the inside of the casing. Even if the raw material is stirred, the raw material remaining in the casing can be reliably prevented from flowing into the liquid inlet.

Further, the pressure in the injection chamber (liquid inlet) is detected by the pressure detecting means, and when the pressure exceeds a set value, the air cylinder is instantaneously actuated to fit the valve body into the liquid inlet. Therefore, during injection, even if the raw material in the casing closes the injection port for some reason, the clogging of the raw material is instantaneously released, so that continuous injection can be performed thereafter. is there.

[Brief description of the drawings]

FIG. 1 is an enlarged vertical sectional side view of a first embodiment.

FIG. 2 is an enlarged vertical cross-sectional side view of the same liquid injection state.

FIG. 3 is an enlarged vertical cross-sectional side view of the liquid injection stop state.

FIG. 4 is an enlarged vertical sectional side view of the second embodiment.

FIG. 5 is a partial longitudinal front view of a known kneading machine with a liquid injection mechanism.

FIG. 6 is an enlarged cross-sectional view of the same casing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 6 Kneading stirring blade 7 Kneading stirring blade 21 Liquid supply part 25 Air cylinder 29 Valve body 30 Liquid injection port 33 Spring 34 Liquid supply port 35 Injection chamber 36 Supply pipe 37 Pressure detecting means

Claims (3)

(57) [Claims] 1. A casing 1 having a pair of parallel kneading and stirring blades 6 and 7 rotatably disposed therein. The casing 1 is provided with a liquid supply unit 21 for supplying a liquid into the casing 1. in with the liquid mechanism kneader in the liquid feed section 21, a valve body 29 for opening and closing the liquid inlet 30, the valve body 29, a spring means 33 for biasing the closing direction of the liquid inlet 30, the An air cylinder 25 for moving the valve body 29 in the opening direction of the liquid inlet 30 against the spring means 33 by being supplied with air, and the valve body 29 is provided with the liquid inlet 30 A kneading machine with a liquid injection mechanism characterized in that when it is closed, it fits into the liquid inlet 30 and its tip projects from the liquid inlet 30 toward the kneading and stirring blades 6 and 7. 2. A casing 1 in which a pair of parallel kneading and stirring blades 6 and 7 are rotatably disposed, and the casing 1 is provided with a liquid supply unit 21 for supplying a liquid into the casing 1. in with the liquid mechanism kneader in the liquid feed section 21, a valve body 29 for opening and closing the liquid inlet 30, the valve body 29, a spring means 33 for biasing in the opening direction of the liquid inlet 30, the An air cylinder 25 for moving the valve body 29 in the closing direction of the liquid inlet 30 against the spring means 33 by being supplied with air; A kneading machine with a liquid injection mechanism characterized in that when it is closed, it fits into the liquid inlet 30 and its tip projects from the liquid inlet 30 toward the kneading and stirring blades 6 and 7. 3. A pressure detecting means 37 for detecting the pressure in the liquid inlet 30. When the pressure detected by the pressure detecting means 37 is equal to or higher than a set value indicating the closed state of the liquid inlet 30, the valve is opened. The kneading machine with a liquid injection mechanism according to claim 1 or 2, wherein the body (29) is fitted into the liquid injection port (30).