JPS61261006A - Continuously kneading machine - Google Patents

Abstract

PURPOSE:To obtain the two axes continuing mixer having two layer floor type and the height of said floor remarkably lower than that of a usual machine by causing kneaded material to be water-exhausting type being able to discharge along the axial direction of a chamber and a rotor. CONSTITUTION:Material is continuously thrown in through a material-throwing inlet 3, while rotating a rotor 1, and the material is transferred into a kneading part 18 from a material sending part 17, and then is crashed to pieces, sheared and kneaded in molten state. The kneaded material is sent out to the side of a material-discharging part 19 by the thrust of a screw shaft. The material with pressure is successively exhausted under concentrically pushing from an exhausting mouth 14 through a passing space 15 provided at the side of a bear ing hausing 4 by way of the junction path 14a at chamber side. Accordingly, by connecting a die or a gear pump to this exhausting mouth 14 in series, a continuous mixer plus a die or the system of horizontal connecting in series of the gear pump may be easily obtained, whereby both initial and running costs may be remarkably reduced, and the control and maintenance management are also easily achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement of a continuous kneading machine having a two-shaft rotor with a dual-support structure in which both ends of the rotor shaft are supported by bearings.

<Prior art> Machines for the purpose of kneading polymeric substances (homogenizing the same substance, mixing different substances, or anti-J5) are broadly classified into various types of single-screw extruders, co-twin-screw extruders, and kneading extruders. It can be classified into two systems and six types: an extruder system which is divided into three types, and a kneader system which is divided into six types: an open roll kneader, a patch type kneader, and a continuous kneader. Although the extruder system, which is divided into the first six types, also has a kneading effect, its main purpose is to perform the extrusion effect, and the cross-mixing effect is only a secondary purpose. It goes without saying that the main purpose of the rolls and kneading machines, which are divided into two types, is kneading. In addition, the kneading action in these models is
As is known, the shearing force generated by the interaction between two IC walls (one wall is fixed and the other wall moves, or two walls move in different ways) applies a shearing force to the material filling the inside, This is an attempt to cause the intended crosstalk.

The mechanical difference between the extruder system and the kneader system described above is that in an extruder system, the rotating shaft (generally a screw shaft) has a cantilevered structure with one end of the shaft supported by a bearing. In contrast, in a kneader system, the rotating shaft (generally a roll or rotor) is supported by a bearing.The reason for this is that the kneader system Each model requires a large shearing action, which increases the mutual reaction force generated on the rolls or rotors (the force that acts to open the rolls or between the rotors), or the bending against the outer wall. It is necessary to have a double-support structure on the rotating shaft, and this has the effect of lengthening the life of the rotating shaft.The present invention is particularly directed to continuous kneading machines in the above-mentioned kneading machine system. , continuous kneading ia
If we were to define it, it would be a kneading machine that consists of one or more rotating bodies, regardless of whether or not it has an extrusion function, and that has bearing support structures on both axial sides of the rotating body that kneads materials. Although there are various known types of continuous kneading machines, one of the most common continuous kneading machines is shown in FIG. The model shown in the figure is a model commonly known as rFCMJ made by 7Arel Corporation in the United States, and two
One rotor 131 (in the figure, there is only one rotor, and there is another rotor on the other side of the illustrated rotor) is long, and the other one is short. (not shown), and a connecting gear is attached as shown in the figure, and the power is transmitted from this gear to the other short rotor 1B!+ side, and these rotors c
As shown in the figure, one end of 111 is supported by a spherical roller bearing on the frame side of the drive unit 7, and a thrust bearing made in conjunction with a spherical roller bearing, and a dust stop G51' is provided on the drive unit frame side.
t-The inner surface of the chamber on the hopper side is continuous and separable from the rotor clIl! 3Ilt-A screw shaft portion (31a) for feeding the material is formed on the rotor 6111311 which is surrounded and corresponds to between the hopper portions, and a front wing and a rear wing are formed on the rotor fat 11311 which corresponds to between the chamber portions. ,
A kneading blade (31b) such as a discharge blade is formed, and the material continuously supplied from the hopper part is continuously supplied into the chamber part through the screw shaft part (31a). When passing through the gap between the rotor tip and the inner surface of the chamber, the material is sheared and pulverized, and then melted and dispersed by moving back and forth by kneading blades with different twist directions and by transferring and receiving material between the 20 and 20 meters. The kneaded material is continuously discharged from the rotor et+! 3. The other shaft end of phantom is sleeve 4Q
(6) is a dust stop, (43 is a cylinder for moving the chamber part, and Japan is a variable opening device in relation to the orifice, and the cylinder f43 is supported by a spherical roller bearing l. Therefore, the chamber part β
The η hopper section is moved in the axial direction from the dust stop (6) position to clean the inner surface of the chamber and the surface of the rotor. Also, -en indicates a cooling device that also cools the rotor all chamber parts, especially in this model, a chamber cooling device! 't drilled side method is planned to improve the cooling capacity, and this cooling capacity is at the material discharge temperature T.
It has the function of freely changing the die and specific energy level, and a continuous feeder (not shown) is connected between the hopper sections to continuously supply materials.
The rotor rotation speed and throughput are independent variables so that the energy level can be changed freely, and in a continuous kneading machine, the amount of material fed from the feeder is directly discharged, and the rotor! The rotation speed according to the 311 rule is variable, and the optimum jar rate can be adopted depending on the material cross-circuit conditions. The clearance θ between the orifice, which is the discharge port to be closed, is variable, but even if the value of θ is changed, the discharge amount remains unchanged, and the only change is the speed of the material passing through the orifice.
The function of a variable orifice link is that the energy level imparted to the material can be varied.

<Problems to be Solved by the Invention> The problems with the two-screw continuous kneading machine seen in the above-mentioned representative examples are as follows. That is, in the prior art, both shaft ends t of the rotating body (R) by the roll or rotor are fixed at the bearing CB) (B) V'cj as shown in FIG. When the material is fed as shown onto the rotating body (R) at the desired position on the rotating body (R), it is essential that the material also be discharged between the bearings (B). This additional requirement arises unavoidably from the structure in which the inner surface of the bearing (BJ) needs to be in close contact with the rotating body (R), and the outer surface of the bearing (BJ) is in close contact with the inner surface of the housing. Conventionally, in a machine, both are used independently, and the upstream material feed section and the downstream material discharge section are provided separately when viewed from the material flow direction, and between them, the former is used to store fixed material, while the latter is used to store melted material. This is a type of system in which materials are delivered and received by free fall, but recently a processing system of kneading machine + gear pump has been developed from a processing system of kneading machine + extruder, and compared to extruder, gear pump is more efficient as a single machine. It has the great advantage of being inexpensive both in terms of initial cost and running cost in a plant of the same scale using it.

If we consider the conventional kneading machine + extruder system and the kneading machine + gear pump system, as shown in Figure 6 (phantom (b)), the former is an extruder (ET) as shown in (a). is on the 1st floor 707 (I) [, kneading machine (M)C) is on the 2nd floor -yo7
In (n), the Mayu raw material feeder (FD) requires a minimum of 6 installation floors, such as the 3rd floor, whereas in the latter case, as shown in the same figure (b), The force required for two layers ζ Its height HU needs to be larger than the height btc of the former, and the installation frame (~*t- is required, including the building) for the kneading machine (MX) Although the latter is cheaper than the former in terms of initial cost, it is thought that form (b) can be further rationalized.

Means for Solving the Problems> The present invention has been devised to solve the above problems in the prior art. Focusing on the fact that the orifice +81 part where the mixed material is pushed out by the following material is forced to be provided with a VC perpendicular to the axial direction of the chamber and rotor, By using a horizontal discharge type that can discharge along the direction, it is possible to mix the kneader (MX) and gear bone 7, for example, as shown schematically in Fig. 4.
'(GP) t - As shown in the figure, it is possible to connect directly on the same floor in the horizontal direction. Specifically, it is a two-shaft rotor shaft consisting of two parallel rotor shafts with a material feeding section, a material mixing section, and a material discharging section on each axis. In the continuous kneading machine, each bearing of both rotor shafts is held downstream from the material discharge section through a seal structure with the rotor shaft, and a bearing is held between the inner surface of the chamber surrounding both rotor shafts and the outer periphery of the bearing. A housing provided with a passage space for the mixed material to bypass the outside @ is installed integrally with the chamber, and a housing for the material from the mixed material passage space is installed at a position in front of the bearing part of the rotor shaft in the chamber in the Q-axis direction. The merging outlet t' is to be thrown.

According to the technical means of the present invention,! ! ! ! Figures 5 and 6
As shown in the figure, two rotors (1) (11 (in the figure, only one is fully shown, and on the other side of this rotor +11, another tree is placed horizontally in parallel) are arranged in a known manner. A material inlet 3) is disposed in the chamber (2) and provided between one end of the chamber (2); the material input port 3) is defined as the upstream side, and the right side as viewed from the drawing is defined as the downstream side. From the upstream side of the material input port (3) to the axial periphery of each rotor (1), as shown in Figure 5, there is a material feed section provided with a screw shaft, and a material mixing blade provided with a kneading blade using a twisted blade. Following the end of the material kneading section, a material discharging section by the screw shaft VC is formed in a continuous manner, similar to the material feeding section σ force, and a rotor fi of this type is formed.
In order to rotate the front end side of the rotor 11+ by a bearing, in the present invention, the front end of the rotor 11+, which is the tapered end part tto)2, is connected to the bearing via the tapered ring (9), in one example, a radial bearing. [51K
Therefore, when supporting the chamber (
2), the bearing Hakling+411C bearing (51) which is integrated with the chamber (2) is supported in an encircling manner, and the inner surface of the chamber (21) and the bearing (6
1, there is a passage space σ for the kneaded material that communicates with the end of the material discharge part and the material kneading part in the hack ring (4).
Reply α in which multiple pieces of 5) are formed in the same housing +41
Each bearing of both rotors IINII +
51161, and the ITr housing (
On the surface facing the rotor (1) +11 of 4), there is a seal ring (7) to prevent molten material from entering the bearing [51 side].
A K adapter oat is provided in front (downstream side) of the hack ring 14) as an extension of the chamber 12), and this adapter is attached to the front of the hack ring (4). It passes through the sauce and I' (therefore, the passage space 5 for multiple mixed materials) and is thrown into the discharge bowl U4t-axis center 11, which has a confluence path (14a) for unused materials. The following effects occur due to flC. That is, in the fifth evil, rotor +11
fil 'i is rotated, and the material is continuously inputted from the material input port +31, and the material is moved from the material feeding section ση into the kneading section (1 section), and as is known, the material is pulverized through the kneading blades. Shearing and melting and kneading are carried out in the same way as in a conventional continuous kneading machine, and the mixed material is sent out to the end of the material discharge section by the discharge capacity of the screw shaft in the material feed section ση of the continuously supplied material. From here, it is intensively pushed out and discharged under pressure from the discharge port section through the confluence path f14a)i on the chamber side to the passage space l11u51'' which is further connected to the pairing housing (4) side of liQ. .Therefore, by directly connecting and arranging a die casing or a gear pump (not shown) to this discharge port H, when extrusion is to be performed under easy pressure, extrusion can be immediately obtained by the die, and it is also easy to extrude. If it is not extruded at a certain pressure, it is possible to increase the pressure by τ via a gear pump and extrude it through a die attached downstream of the gear pump. Therefore, according to the kneading machine of the present invention, the kneading machine + gear pump layout shown in FIG. 4 can be implemented very easily. 0 <Example> An appropriate example of the Kihatsu F!A kneading machine will be explained regarding factor 5.6.The example shown in Fig. I5 only shows the main part, but the rotor fil. On the left side, the structure of the drive end part of the continuous kneading machine illustrated in FIG. In other words, compared to conventional continuous kneading machines, the present invention has a material discharging section (structure 1111 and below) that follows the material mixing section (structure 1111 and below) that conflict with each other. The overall shape of the hack ring (4) is as shown in Fig.
) is compatible with the cross-sectional shape of the chang-<m
In one example, six kneaded material passage spaces 06 correspond to the inner surface shape of the bearing (6) and surround the outer periphery of the bearing (6).
4 are arranged in the construction cost through the partition by the rib Q phrase.

The number is more flexible than fixed. The Lipu River passes through space (1
By existing alternately with 57, Hackling (4
) can provide sufficient structural strength to withstand the forces generated.

Further, the seal ring (7) is attached to the material discharge portion 1 of the rotor [11].
By coming into elastic contact with the front end of the bearing (51) in the flow direction through the spring (81), the kneaded material in the molten state is brought into contact with the front end of the bearing (51).
This preventive structure can be easily and freely designed by utilizing the wide surface of the hack ring (4). The first fc outer adapter cap, which forms the discharge port having the confluence channel (14a), is formed as an extension of the chamber (2), and is hacked with Pol H2O1 or the like.
4) on the chamber (2) side, and the adapter (131) and the corresponding head ring (12
+ is fixed to the hack ring (4) by screwing, for example, as a member attached to the hack ring (4) and also as a bearing (51 taper ring (9) taper end + 101 side seven-pronged support and also to prevent the intrusion of the mixed material). , the outer surface of the head ring (14) and the inner surface of the adapter 031 are processed appropriately to form a merging path (14a). Also, for the Hakling +4HC, the lubricating oil inlet 1B to the bearing (5) is In addition to providing a VC, there are also some material leakage outlets (11) that are expected to occur during long-term operation of the TiC, both of which are connected to the above-mentioned lip ae.
Form using +'. In addition, since the chamber (2) is movable in the axial direction as mentioned earlier, the clearance between the tapered ends 10 of the taper link ta rotor 111 can be mtm, and this allows the sealing surface pressure of the seal ring (7) to be reduced by mtm. Adjustment is possible.

When the kneading machine of the present invention is installed on the side of the gear pump 7 discharge port, the suction pressure of the gear pump is generally VC +
o*/i, the thrust at the material feed section (171VC) of the kneader is transferred to the discharge port (I41VC
I4 so that the material pressure at the
If installed, it is suitable for replenishing the suction pressure of the gear pump. Immediately in front of this discharge port, a structure can be provided that allows the cross section of the flow path to be varied in order to change the energy level added to the material. For example, a screw is installed perpendicular to the flow path near the outlet shown in FIG. 5, and the flow path is narrowed by tightening the screw.
Style FjI! rA structure or device that can fully automatically and continuously change the warping area to 1. If you use this, you can change the fullness of the material inside the kneading machine and freely control the energy level applied to the material. This allows the degree of kneading to be controlled.

<Effect of the invention> Original F! According to A, in contrast to the vertical discharge in which the kneaded material is dropped and discharged in a direction perpendicular to the axial direction of the kneaded product, which was considered unavoidable in conventional continuous kneading machines, in the present invention, the kneaded material is discharged as it is in the axial direction of the entire kneading part. In addition, only horizontal discharge of extrusion under pressure is easily possible, and this method requires a high installation space including the building for conventional continuous kneading machines + extruders or continuous kneading machines with 10 gear pumps, and installation due to the multi-layer floor structure. This eliminates the trouble of horizontally connecting a continuous kneading machine + die or gear pump, significantly reducing both initial and running costs, and reducing force and
Machine control and maintenance management are also made extremely easy, and this is an excellent product that solves all of the problems of continuous kneading machines that are widely used in practice, and further increases its utility value.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional front view of an example of a conventional continuous kneading machine, I! 12
The figure is an explanatory diagram of the dual support structure, Figure 5 is a schematic diagram of a conventional kneader installation plant, Figure 4 is a schematic diagram of a kneader installation plant of the present invention, and Figure 5 is a main part of the actual flow side of the kneader. Vertical front view, No. 6
The figure is a sectional view taken along the line A-A in FIG. +11...Rotor, (2)...Chamber, (3)・
...Material input port, (4)...Bearing hack ring,
(51...Bearing, (71...Seal ring,
(9)...Taper ring, 1101...Taper end, U2I...Head ring, Brace...Adapter, (14I...Material discharge port, 051...Material passage space, Martyr...Rep ,■...Material feed section, 081...
Material kneading section, 9)...Material discharge section.

Claims (1)

[Claims] 1. In a two-shaft continuous kneading machine comprising a material feeding section, a material kneading section, and a material discharging section provided on each of two rotor shafts arranged in parallel to each other, from the material discharging section. A passage space for the mixed material that holds each bearing of both rotor shafts downstream through a seal structure with the rotor shaft, and that bypasses the bearing section between the inner surface of the chamber that surrounds both rotor shafts and the outer periphery of the bearing. The continuous kneading method is characterized in that a housing is integrally attached to a chamber, and a confluence/discharge port for the material from the kneaded material passage space is provided in the chamber at a position axially forward of the bearing portion of the rotor shaft. Machine. 2. The continuous kneading machine according to claim 1, wherein the thrust force applied to the material at the material discharge section has a maximum material pressure of 10 kg/cm^2 at the combined discharge port. 3. The energy level applied to the material inside the kneading machine can be set freely by providing a device for continuously varying the cross-sectional area of the material flow path immediately before the confluence/discharge port. Continuous kneading machine as described. 4. The continuous kneading machine according to claim 1, wherein the polymer material is kneaded and extruded by directly connecting the combined discharge port to a gear pump on the same floor.