JPH0674306U - Extruder - Google Patents

Abstract

(57) [Summary] [Purpose] To remove foreign substances mixed in ceramic raw materials and eliminate the adverse effects of these foreign substances on molded products. [Structure] A tip of a screw 6 rotatably disposed in a transfer passage through which a ceramic raw material V is transferred, and the screw 6
The filter 12 for capturing the foreign matter D mixed in the ceramic raw material V is provided between the ceramic raw material V and the molding member 14 for molding the ceramic raw material V. [Effect] The foreign matter D mixed in the ceramic raw material V is gradually transferred to the forming member 14 in the transfer passage by the rotation of the screw 6, and the filter 1 is transferred during the transfer of the ceramic raw material V.
Filtered by 2. The foreign matter D mixed in the ceramic raw material V is trapped on one side surface of the filter 12 and does not reach the molding member 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is, for example, a clay kneading machine for kneading raw materials for ceramic products such as exterior tiles and floor tiles to form a uniform mass of soil, and an extrusion molding machine for shaping the raw materials into the tile shape. Regarding an extruder.

[0002]

[Prior art]

 For ceramic products such as exterior tiles and floor tiles, in addition to the dry molding method in which powdery clay is press-molded, clay-like lumps are formed into tile shapes by an extruder, and the continuous molding is performed from the extruder. A wet molding method is widely used in which a strip-shaped extruded product is cut with a piano wire. In this wet molding method, feldspars and porcelain stones, which are made into fine powder, are first kneaded by a clay kneading machine so as to have a water content of about 20 to 25%, and at the same time, a rectangular parallelepiped lump is formed, The clay-like mass is put into an extruder and molded into a tile shape.

Therefore, the configuration of the extrusion molding machine of the above-mentioned conventional extruders will be briefly described below. In this extruder, an elongated screw for transferring clay-like ceramic raw material is rotatably arranged by a drive motor in the main body of the extruder, and the ceramic raw material fed from the inlet is gradually fed by this screw. It is designed to be transferred in the direction of the discharge port. A molding member is fixed in the discharge port so that the ceramic raw material is continuously extruded in a strip shape from the extrusion molding machine by the rotational driving force of the screw while being molded into a predetermined shape by the molding member. Has been done. The strip-shaped green substrate thus extruded is cut into a predetermined length by a piano wire and transferred to the firing process.

[0004]

[Problems to be solved by the device]

 By the way, the ceramic raw material transferred to the above extruder is not necessarily composed of only feldspar, which is a fine powder, and foreign substances such as wood chips, plastics, concrete pieces, etc. are mixed. In many cases. When a ceramic raw material mixed with such foreign matter is used, the foreign matter is locked to the molding member fixed in the discharge port of the extrusion molding machine, and an elongated groove is formed on the outer surface of the green body for tile. There is a very high risk of adverse effects such as warping of the green body for tiles that has been formed due to the unevenness of the pressure at which it is formed or the ceramic raw material is pushed out. Further, in the case of a clay kneading machine, uniform rectangular parallelepiped lumps are not continuously formed, and, like the above, elongated grooves are formed on the outer surface.

Therefore, the present invention has been proposed in order to solve the problems of the above-described conventional extruder, and can effectively eliminate the adverse effects of foreign substances mixed in the ceramic raw material. It is intended to provide.

[0006]

[Means for Solving the Problems]

 The present invention has been proposed to achieve the above-mentioned object, and is an extruder for continuously extruding ceramic raw materials while molding them into a predetermined shape. An extruder main body having a transfer passage communicating with the mouth formed therein, and a driving means arranged in the transfer passage to be rotationally driven, and the rotary driving force gradually pushes out the ceramic raw material in the extruder main body. Slender screw that moves in the direction, degassing means that removes the gas in the ceramic raw material during the transfer of the ceramic raw material by this screw, and the degassing fixed to the end of the transfer passage of the extruder body. At least a molding member for molding the ceramic raw material degassed by the means into a predetermined shape, and a filter arranged between the degassing means and the molding member for trapping foreign matters in the ceramic raw material. hand And it is characterized in Rukoto.

[0007]

[Action]

 According to the extruder of the present invention, the ceramic raw material fed through the feeding port is gradually transferred toward the end of the transfer passage by the rotation of the screw, and is degassed by the degassing means during the transfer, and further the filter is used. After being filtered by, it is molded into a predetermined shape by a molding member and continuously extruded to the outside. Therefore, even if foreign materials are mixed in the ceramic raw material put into the extruder main body, the foreign materials are captured by the above filter and do not reach the molding member.

[0008]

【Example】

 Hereinafter, an embodiment of an extruder according to the present invention will be described in detail with reference to the drawings. In this embodiment, the present invention is applied to a clay forming machine.

As shown in FIG. 1, the clay kneading machine 1 is fixed to the upper surface of a mounting table 2 which is fixed on the floor via a base 3. A machine main body 4 fixed horizontally on the upper surface, an upper transfer passage and a lower transfer passage formed in the machine main body 4, and first and second transfer passages rotatably arranged in these transfer passages. The screws 5 and 6, a drive motor 7 that rotationally drives the screws 5 and 6, a deaerator 8 disposed between the upper transfer passage and the lower transfer passage, and the second screw. Two cylindrical bodies 9 and 10 fixed to the front end side of the lower transfer passage in which 6 is disposed, a filter support ring 11 fixed to the front end of this cylindrical body 10, and this filter support ring 11 Filter 12 supported by the above, It is roughly composed of a hollow truncated cone-shaped pot-shaped member 13 fixed to the filter support ring 11, and a molding member 14 fixed to the tip of this pot-shaped member 13.

As shown in FIG. 1, the machine body 4 is provided with a charging port 15 for charging a clay-like ceramic raw material V on the upper part of the machine body 4. The charging port 15 is inside the machine body 4. And communicates with an upper transfer passage (not shown) formed substantially horizontally. The first screw 5 is rotatably arranged in the upper transfer passage. The first screw 5 is for gradually transferring the ceramic raw material V charged into the charging port 15 to the front end side of the machine body 4 while kneading in the upper transfer passage. The screw 5 is rotated by the rotational driving force of a drive motor 7 connected via a speed reducer 16 arranged on the base end side of the screw 5.

Further, in the clay kneading machine 1, a second screw 6 which is longer than the first screw 5 is rotatably arranged below the first screw 5. There is. The second screw 6 is rotated at the same speed as the first screw 5 by the rotational driving force of the drive motor 7 similarly to the first screw 5. It should be noted that, as will be described later, the ceramic raw material V transferred by the first screw 5 is further transferred to the front end side by the second screw 6 in the middle of the front end side of the second screw 6, which will be described later. A lower transfer passage is formed. Further, a flange portion 17a fixed to a flange portion 9a formed on one end peripheral surface of a first tubular body 9 described later is fixed to the peripheral surface of the distal end of the cylindrical portion 17 in which the lower transfer passage is formed. Has been formed.

Then, the second screw 6 is provided from the tip of the upper transfer passage, which is the middle part on the tip side of the clay kneading machine 1, in which the first screw 5 is provided. A deaerator 8 for removing the gas contained in the ceramic raw material V is provided across the base end of the lower transfer passage. The ceramic raw material V transferred by the first screw 5 falls into the lower transfer passage in the deaerator 8 due to the weight of the ceramic raw material V itself. That is, in the clay forming machine 1, the gas in the ceramic raw material V is degassed in the deaerator 8 and dropped into the lower transfer passage, and further transferred to the tip side by the second screw. Is done.

Further, at the tip of the lower transfer passage formed in the machine body 4, there are provided first and second cylindrical bodies 9 and 10 for further extending the transfer passage to the tip side of the machine body 4. It is fixed. Flange portions 9a, 9b, 10a and 10b are formed at both ends of the peripheral surfaces of these tubular bodies 9 and 10, respectively. One end of the first tubular body 9 is fixed to the mechanical body 4 by a bolt 18 at a flange portion 17a formed on the peripheral surface of the cylindrical portion 17 of the machine body 4, and the other end is It is fixed to one end of the second tubular body 10 by a bolt 19.

As shown in FIGS. 1 and 2, a bowl-shaped member 13 is fixed to the tip of the second tubular body 10 with a filter support ring 11 interposed therebetween. That is, the filter support ring 11 is fixed between the second tubular portion 10 and the bowl-shaped member 13. As shown in FIG. 2, the filter support ring 11 has an outer diameter equal to that of the flange portion 10b formed at the other end of the second tubular body 10, and a bolt described later is inserted therein. A ring-shaped fixed portion 11b having a plurality of insertion holes 11a formed therein, and a transfer passage 10c formed in the ring-shaped fixed portion 11b and having the same diameter as the transfer passage 10c formed in the second tubular body 10. It is composed of a circular opening 11c formed and a filter mounting portion 11d formed on one side surface of the filter support ring 11 and having a diameter longer than the diameter of the circular opening 11c.

Further, a filter 12 for filtering the ceramic raw material V transferred by the rotation of the second screw 6 is mounted on the filter mounting portion 11 d formed on the filter support ring 11. The filter 12 is composed of a disc-shaped wire mesh in which wires having a circular cross section are knitted in the length and width, and in this embodiment, the filter 12 has a size of 7 mm in length and width.

Further, the pot-shaped member 13 is fixed to the other side surface of the filter support ring 11. The bowl-shaped member 13 has a flange portion 13a having the same outer diameter as the ring-shaped fixing portion 11b formed on the one end and formed on the filter support ring 11, and a mortar-shaped transfer member gradually reduced in diameter. A passage 13b and a rectangular opening (not shown) formed at the tip of the bowl-shaped member 13 and fixed to a molding member 14 described later and communicating with the transfer passage 13b are formed in the center. It is composed of a rectangular fixing plate portion 13c. The flange portion 13a is provided with a plurality of insertion holes 13d through which a plurality of bolts 20 for fixing the bowl-shaped member 13, the filter support ring 11 and the second tubular body 10 to each other are inserted. In addition, a plurality of bolts 21 for fixing the fixing plate portion 13c and a rectangular fixing plate portion 14a formed on the molding member 14 described later are inserted into the fixing plate portion 13c. The insertion hole 13e is formed.

The molding member 14 described above is fixed to the tip of the bowl-shaped member 13. As shown in FIG. 2, the forming member 14 includes a rectangular fixing plate portion 14a fixed by a bolt 21 to a fixing plate portion 13c formed at the tip of the bowl-shaped member 13, and the fixing member 14a. The plate portion 14a includes a rectangular parallelepiped shaped portion 14b protruding horizontally from one side surface. A plurality of insertion holes 14c are formed in the fixing plate portion 14a at positions corresponding to the plurality of insertion holes 13e formed in the fixing plate portion 13a of the bowl-shaped member 13. Further, the molding member 14 is connected to an unillustrated rectangular opening formed in the bowl-shaped member 13 and has a discharge passage 14e having a rectangular cross section formed on the left and right with a partition plate 14d therebetween. 14f is provided. By passing through these discharge passages 14e and 14f, the ceramic raw material V is continuously extruded from the molding member 14 in the state of being molded into a rectangular parallelepiped shape, as shown in FIG. Then, it is placed on the belt conveyor 22 and transported downstream.

According to the clay kneading machine 1 according to the present embodiment having the above-described configuration, the ceramic raw material V charged into the charging port 15 is first rotated by the drive motor 7. By rotating the liu 5, the upper transfer passage (not shown) is kneaded and gradually transferred into the deaerator 8 provided on the tip side of the first screw 5. The ceramic raw material V transferred into the degassing device 8 is degassed by the degassing device 8 and enters the lower transfer passage where the second screw 6 is rotationally driven by the drive motor 7. Can be dropped. Then, the ceramic raw material V is gradually passed through the cylindrical portion 15 of the machine body 4 as shown in FIG. 3 by the rotational driving force of the second screw 6 while being sealed in the lower transfer passage. Then, it is transferred into the first and second cylindrical bodies 9 and 10 and press-fitted into the bowl-shaped member 13. At this time, since the filter 12 is mounted on the filter mounting portion 11d formed on the filter support ring 11 between the second cylindrical body 10 and the bowl-shaped member 13, the filter 12 is inserted into the inlet 15. Even when foreign matter D such as concrete fragments or wood is mixed in the input ceramic raw material V, the foreign matter D is effectively captured by the filter 12, and the pot-shaped member 13 is provided with Only the ceramic raw material V from which the foreign matter D has been filtered is press-fitted.

As described above, the ceramic raw material V press-fitted into the pot-shaped member 13 further passes through the discharge passages 14e and 14f formed in the molding member 14 to form a rectangular parallelepiped shape. In this state, the two pieces are continuously extruded from the molding member 14, placed on the belt conveyor 20, and conveyed downstream. The ceramic raw material V molded in the rectangular parallelepiped shape by the clay kneading machine 1 and continuously extruded in this manner is not shown in the figure using a piano wire or the like while being conveyed to the downstream side by the belt conveyor 20. After being cut into a predetermined length by a cutting device, it is conveyed to an extrusion molding machine for forming a tile shape.

As described above, according to the clay kneading machine 1 according to the present embodiment, the filter 12 is arranged between the bowl-shaped member 13 and the second tubular body 10, so that the ceramic raw material V is filtered by this filter 12, and foreign matter D mixed in the ceramic raw material V is captured by the filter 12, so that the foreign matter D does not enter the molding member 14. Accordingly, the foreign matter D is trapped by the partition plate 14d or the like in the forming member 14 and is continuously extruded from the clay kneading machine 1 to form a groove on the outer peripheral surface of the ceramic raw material V in a rectangular parallelepiped shape. It is possible to effectively prevent adverse effects such as. In the soil kneading machine 1 according to the above-mentioned embodiment, the filter 12 having the size of 7 mm in length and width was used. The size of the mesh depends on the kind of the ceramic raw material and the rotational driving force of the screw. Further, it may be appropriately changed according to the size of the foreign matter to be excluded.

Further, in the above embodiment, the extruder according to the present invention, as described above, is illustrated and described by applying the present invention to the clay kneading machine for kneading the ceramic raw materials and molding into a rectangular parallelepiped shape. However, the present invention is not limited to the above-mentioned embodiment, and may be applied to, for example, an extrusion molding machine that molds a ceramic raw material molded into a rectangular parallelepiped shape by this clay molding machine into a tile shape. When the present invention is applied to this extrusion molding machine, foreign matter is removed by the filter constituting the present invention before the ceramic raw material reaches the molding member, so that the foreign matter is locked to the above molding member and used for tiles. Effectively prevent the risk of warping of the greenware for tiles formed due to the formation of elongated grooves on the outer surface of the greenware and the uneven pressure of the ceramic material for pushing out the ceramic raw materials. be able to. Further, when the present invention is applied to such an extrusion molding machine, the ceramic raw material is twisted by the rotation of the screw and reaches the forming material by the above-mentioned filter, and reaches the forming material. It is possible to effectively eliminate the formation of the green body in a twisted state. Therefore, the distance from the tip of the screw to the forming member can be shortened, and the rotational driving force of the screw can be reduced.

[0022]

[Effect of device]

 As is clear from the description of the above embodiment, according to the extruder according to the present invention, the ceramic raw material charged from the charging port is gradually transferred by the screw in the end direction of the transfer passage, and during the transfer. It is degassed by the degassing means, further filtered by the filter, and then molded into a predetermined shape by the molding member and continuously extruded to the outside.Therefore, foreign substances are left in the ceramic raw material fed into the extruder body. Even when mixed, the foreign matter does not reach the molding member because it is locked by the filter.

Therefore, as in the conventional extruder, foreign matter in the ceramic raw material is locked to the molding member, and the molded green tile raw material is warped, or the rectangular ceramic raw material is elongated. It is possible to effectively prevent the formation of the groove and the like.

In particular, when the present invention is applied to an extruder, not only can foreign matter mixed in the ceramic raw material be captured by the filter, but the ceramic raw material can be twisted by the rotation of the screw. Since it can effectively prevent reaching the forming member, the distance from the tip of the screw to the forming member can be shorter than that of the conventional extruder, and the rotational driving force of the screw is also small. Can be

Further, according to the present invention, as a means for removing foreign matter mixed in the ceramic raw material, a special step or device is not introduced into the step conventionally used, Since the problems of conventional extruders can be effectively solved by simply changing the design of the extruder that has been used conventionally, it is extremely economical without requiring a large capital investment.

[Brief description of drawings]

1 is a side view showing an embodiment in which an extruder according to the present invention is applied to a clay kneading machine.

FIG. 2 is an exploded perspective view showing a configuration from a second cylindrical body constituting the clay kneading machine to a molding member attached to the tip side.

FIG. 3 is a cross-sectional view showing a main part in a state where foreign matter is filtered by a filter.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 clay kneading machine 4 machine body 5 first screw 6 second screw 7 drive motor 8 demolding device 9 first cylindrical body 10 second cylindrical body 12 filter 14 molding member 15 charging port V ceramic raw material

Claims (1)

[Scope of utility model registration request] 1. An extruder for continuously extruding a ceramic raw material into a predetermined shape while molding the ceramic raw material into an external shape, the extruder having a transfer passage communicating with an input port into which the ceramic raw material is input. A main body, an elongated screw which is disposed in the transfer passage and is rotationally driven by a driving means and which gradually transfers the ceramic raw material in the extruder main body in the pushing direction by the rotational driving force, and the ceramic raw material by the screw. Degassing means for removing the gas in the ceramic raw material during the transfer of the ceramic raw material, and molding for molding the ceramic raw material fixed to the end of the transfer passage of the extruder body and degassed by the degassing means into a predetermined shape. An extruder comprising at least a member and a filter arranged between the deaeration means and the molding member to capture foreign matter in the ceramic raw material.