JP2004337767A - Extruding device for viscous material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extruding device capable of reducing waste of viscous materials. <P>SOLUTION: The device 10 has a plurality of extruding units 11 and 12 housing a high-viscosity material M, e.g. a silicone, and the units 11 and 12 can extrude the material M by applying a pressure to the material in each unit. In the device 10, a pressure is applied to the material M in the first extruding unit 11 to extrude; and, when the amount of the material M in the unit 11 decreases to a specified amount or smaller, a relatively small extruding pressure is also applied to the second unit 12 so that the reduction of the amount extruded from the unit 11 is made up with the material M extruded from the unit 12 in order to make a quantitative extrusion possible. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for extruding a viscous material, and in particular, is used by being connected to a device for applying a viscous material. The present invention relates to a device for extruding a viscous material capable of continuously extruding a material without causing the extrusion.
[0002]
[Prior art]
Conventionally, it has been known that a high-viscosity material such as silicone is used as a sealing material between mechanical parts and between electrical components. This sealing material is applied using an application device provided with a nozzle, and the application device is connected to an extruder in which a material is contained in a container. As shown in FIG. 3 and FIG. 4, for example, as shown in FIG. 3 and FIG. 4, a container 50 composed of an open-topped pail tube or the like for accommodating the material M, It is comprised including. The pushing member 51 includes a main body 52 having an inverted T-shape, and a wiper 53 attached to a lower end of the main body 52. A passage 55 penetrating in the vertical direction is formed at the center of the main body 52, while a hole 56 communicating with the passage 55 is formed at the center of the wiper 53. The pushing member 51 keeps the material M constantly pressed by its own weight, and can send the material M to the pump side by the operation of a pump (not shown) connected to the passage 55. At this time, the wiper 53 descends while its outer peripheral surface is in close contact with the inner peripheral surface of the container 50 and scrapes down the material adhering to the inner peripheral surface, thereby suppressing the intrusion of air and the inside of the container. Material can be prevented from being left on the peripheral surface.
[0003]
Further, as other material extruding devices, those disclosed in Patent Literature 1 and Patent Literature 2 are known.
[0004]
[Patent Document 1] JP-A-7-81981 [Patent Document 2] JP-A-2-56271
[Problems to be solved by the invention]
However, in the conventional extruder shown in FIGS. 3 and 4, when the amount of material in the container decreases, the extruded amount tends to decrease sharply, and the material discharge on the application device side is continuous. In this case, there is a disadvantage that the container needs to be replaced with a new material-containing container while a certain remaining amount (see FIG. 4) is left. In this regard, experiments conducted by the present inventors have revealed that when a container containing 17 kg of silicone having a viscosity of 250 Pa · s is used, a remaining amount of about 1000 g is generated.
In addition, since the operation of the coating device connected to the extrusion device must be stopped while the container is being replaced, there is a disadvantage that the coating efficiency of the material is significantly reduced.
[0006]
In addition, as shown in FIG. 7, in Patent Document 1, two tanks containing materials are provided so that the material in the tank can be supplied, but when the material in one tank is reduced, the other is used. Is switched so as to supply the material in the tank, and is not configured to enable simultaneous supply. In addition, the document does not have a configuration for eliminating the inherent material residue when using an extruded member as shown in FIG. 3 described above.
[0007]
Further, Patent Document 2 discloses a method in which a single syringe containing a material is used, the pressure is controlled in accordance with the amount of liquid remaining in the syringe, and a fixed amount of liquid can be discharged. However, the operation of the apparatus is inevitably stopped when the material is replenished.
[0008]
[Object of the invention]
The present invention has been devised in view of such inconveniences, and its object is to reduce waste of materials as much as possible and to hinder the coating efficiency of a coating device connected to an extrusion device. It is an object of the present invention to provide a viscous material extruder that does not cause a problem.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes a plurality of extrusion units for accommodating a viscous material, in a viscous material extruder capable of extruding the material by applying pressure to the material in these extrusion units,
Applying pressure to the material in any one of the extrusion units and extruding the material, and when the material in the extrusion unit becomes equal to or less than a predetermined amount, simultaneously applying pressure to the other extrusion unit to apply the other Is provided such that the material in the extrusion unit is extrudable. With such a configuration, the material can be extruded from another extrusion unit, and continuous material extrusion can be performed.
[0010]
In the present invention, it is preferable that, when pressure is applied to each of the one extrusion unit and the other extrusion unit, the one extrusion unit is maintained at a higher pressure than the other extrusion unit. In such a configuration, it is possible to extrude the material from the one extrusion unit although the amount is small, and even if the expected extrusion amount is not obtained, it is possible to back up with the material extrusion amount from the other extrusion unit, and as a result, , A certain amount of extrusion can be obtained.
[0011]
The present invention also provides a first and a second container for accommodating a viscous material, and a first and a second extruder respectively provided on the upper surface side of the material in each of the containers and provided with an extrusion passage for the material. A member, a communication passage communicating between the extrusion passages, a branch passage branching from the middle of the communication passage and communicating with a predetermined discharge pump, and opening and closing the extrusion passages from the first and second containers, respectively. A first and a second valve, and a first and a second pressure device for applying a pushing pressure to the first and the second pushing members. The first and the second pressure devices are alternately or simultaneously operated. An extruder for a viscous material that is activated to extrude the material to the discharge pump side,
Activating any one of the pressure devices and further increasing the pressure after the material in the container on the pressure device side is extruded by a predetermined amount, and setting one of the other pressure devices to a pressure higher than the pressure of the one of the pressure devices. The configuration is such that the material in the container on the other pressure device side is extruded to the discharge pump side by operating at a low pressure. Here, when the material in the container on either one of the pressure devices reaches the consumption limit, a configuration in which the valve on the container side is closed and the container is replaced with a new material-containing container may be adopted. it can. With such a configuration, the container containing the material can be exchanged alternately without stopping the operation of the device, and in the case of a system in which the coating device is connected to the extrusion device, the continuous coating of the coating device is performed. Operation becomes possible.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 shows a schematic configuration of an extrusion apparatus according to the present embodiment. In this figure, an extruding device 10 includes a first extruding unit 11 and a second extruding unit 12 having substantially the same configuration as each other. The first extrusion unit 11 and the second extrusion unit 12 include, for example, a first container 14 and a second container 15 formed of a pail can or the like containing a high-viscosity material M such as silicone having a viscosity of 250 Pa · s, A first extruding member 20 and a second extruding member 21 which are respectively disposed on the upper surfaces of the materials M and M in the containers 14 and 15 and which include extrusion passages 17 and 18 for the materials M and M, respectively; A communication path 23 that communicates between the extrusion paths 17 and 18; a branch path 25 that branches off from the middle of the communication path 23 and communicates with a discharge booster pump P on the application device side (not shown); A first valve 27 and a second valve 28 for manually or automatically opening and closing the material flow from the containers 14 and 15 respectively, and an extrusion pressure for each material M and M in the first and second containers 14 and 15. Grant It is configured to include first and a pressure device 29 and a second pressure device 30.
[0014]
The first and second extruding members 20 and 21 each include an inverted T-shaped main body 32 and 33, and wiper plates 34 and 35 provided on the lower surfaces of the main bodies 32 and 33, respectively. Holes 34A and 35A communicating with the extrusion passages 17 and 18 in the main bodies 32 and 33, respectively, are formed in the center portions of the wiper plates 34 and 35, so that the material M can be pushed out to the communication passage 23 side. Has become.
[0015]
The first and second pressure devices 29 and 30 include tables 40 and 41 on which the first and second containers 14 and 15 can be placed, respectively, and cylinder devices 42 and 43 that support the tables 40 and 41. By operating the cylinder devices 42, 42, the piston rods 45, 46 move forward and backward, and the tables 40, 41 can be moved up and down. By moving up, the extrusion pressure can be applied to the material M. ing.
[0016]
Next, the overall operation in the present embodiment will be described. Here, it is assumed that the material M is consumed from the material M stored in the first container 14.
[0017]
As shown in FIG. 1, the first valve 27 is opened while the second valve 28 is closed, and the first pressure device 29 supporting the first container 14 is operated to open the container 14. To raise. Here, the pressure is applied to the material M in the first container 14 by raising the first container 14 with a force of about 1 ton, and the material is supplied to the booster pump P through the communication passage 23 and the branch passage 25. Is supplied. Thus, the material M can be continuously discharged from a nozzle of a coating device (not shown) connected to the booster pump P.
[0018]
As shown in FIG. 2, when the amount of material M in the first container 14 decreases and the amount of extrusion per unit time decreases relatively, the second valve 23 is opened and the first valve 23 is opened. The operating conditions of the pressure device 29 are switched to raise the first container 14 with a force of about 2 tons. At the same time, the second pressure device 30 is operated to raise the second container 15 with a force of about 1 ton. Then, from the first container 14, while the extrusion amount is reduced, the material is continuously pushed out to the communication path 23, while the reduced amount of the material M is also pushed out from the second container 15, The amount of the material M sent to the branch 25 is kept constant. While the material M on the side of the second container 15 is continuously consumed under such conditions, the material M on the side of the first container 14 can be continuously extruded while reducing the amount of extrusion. The extrusion of M is continued. Then, when the material M in the first container 14 reaches the consumption limit, the first valve 27 may be closed, and a new container containing the material may be set.
[0019]
After replacing the first container 14 with a new container containing the material, when the amount of the material M on the second container 15 side is reduced, the first valve 27 is opened, and the new valve is opened according to the same principle as described above. The material M in the first container is extruded according to the decrease in the amount of material pushed out from the second container. Incidentally, in the extruder according to the present embodiment, when the same amount of material and container as in the conventional example were used, the remaining amount of the material in each container could be suppressed to about 200 g or less.
[0020]
Therefore, according to such an embodiment, the material in the container can be consumed as much as possible, and practicality that is more economical than the conventional example can be provided. Moreover, since the materials of the containers 14 and 15 can be alternately extruded, it is possible to extrude the material from the other container while exchanging one of the containers. It is possible to dramatically improve the efficiency when adapted to an automatic device for performing sealing or the like at intervals.
[0021]
Although the best configuration and method for carrying out the present invention have been disclosed in the above description, the present invention is not limited to this.
That is, although the present invention has been particularly shown and described with particular reference to particular embodiments, it should be understood that the invention may be practiced without departing from the spirit and scope of the invention. On the other hand, those skilled in the art can make various modifications in shapes, materials, quantities, and other detailed configurations.
[0022]
For example, in the above-described embodiment, the case where the number of the extrusion units 11 and 12 is two has been illustrated and described. However, the number of the extrusion units 11 and 12 can be further increased. Although the first and second pressure devices 29 and 30 are shown as installation types such as a base (not shown), a frame is provided above the first and first containers 14 and 15 to be a suspension type on the frame. It can also be configured. Further, the above-described pressures applied by the first and second pressure devices 29 and 30 are exemplarily shown, and may be appropriately increased or decreased according to the viscosity of the material, the design extrusion amount, and the like. it can.
[0023]
【The invention's effect】
As described above, according to the present invention, it is possible to extrude a material while aiming at alternate use of an extrusion unit, and it is possible to realize continuous material extrusion without stopping operation. An apparatus for extruding a viscous material can be provided.
[0024]
Further, even when the material of one container is consumed, the material of another container can be extruded, so that the container containing the material can be exchanged alternately. A continuous application operation of the apparatus can also be performed. Therefore, even when the present apparatus is incorporated into a production line of various mechanical parts, devices, and the like, it is possible to avoid a possibility that the continuous operation of the production line is hindered.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing the whole of an embodiment.
FIG. 2 is a schematic configuration diagram when each extrusion unit is operated.
FIG. 3 is a schematic configuration diagram of a conventional extrusion device.
FIG. 4 is a schematic configuration diagram of a conventional extrusion device showing a state in which the remaining amount of the material is reduced.
[Explanation of symbols]
Reference Signs List 10 extrusion device 11 first extrusion unit 12 second extrusion unit 14 first container 15 second container 17 extrusion passage 20 first extrusion member 21 second extrusion member 23 communication passage 25 branch passage 27 first Valve 28 Second valve 29 First pressure device 30 Second pressure device M Viscous material P Booster pump

Claims (4)

In the extruder for a viscous material, which includes a plurality of extrusion units for accommodating the viscous material and applies pressure to the material in these extrusion units to enable the material to be extruded,
Applying pressure to the material in any one of the extrusion units and extruding the material, and when the material in the extrusion unit becomes equal to or less than a predetermined amount, simultaneously applying pressure to the other extrusion unit to apply the other An extruder for a viscous material, wherein the material in the extrusion unit can be extruded. The viscosity according to claim 1, wherein when pressure is applied to each of the one extrusion unit and the other extrusion unit, the one extrusion unit side is maintained at a higher pressure than the other extrusion unit side. Material extrusion equipment. First and second containers for accommodating the viscous material, first and second extrusion members respectively disposed on the upper surface side of the material in each of the containers and each having an extrusion passage for the material, and each extrusion passage A communication path for communicating between the communication paths, a branch path for branching from the middle of the communication path and communicating with a predetermined discharge pump, and first and second ports for opening and closing the respective extrusion paths from the first and second containers. And a first and second pressure device for applying extrusion pressure to the first and second extrusion members, and the first and second pressure devices are alternately or simultaneously operated to transfer the material. A viscous material extruder that can be extruded to the discharge pump side,
Activating any one of the pressure devices and further increasing the pressure after the material in the container on the pressure device side is extruded by a predetermined amount, and setting one of the other pressure devices to a pressure higher than the pressure of the one of the pressure devices. An apparatus for extruding a viscous material, wherein the apparatus is operated at a low pressure so that the material in the container on the other pressure device side can be extruded to a discharge pump side. 4. The container according to claim 3, wherein, when the material in the container on one of the pressure devices reaches a consumption limit, the valve on the container is closed to allow replacement with a new container containing the material. Extrusion equipment for viscous materials.

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