JP4689507B2 - Kneading defoaming device with temperature adjustment function and kneading defoaming method - Google Patents

Description

  The present invention relates to a kneading and defoaming apparatus with a temperature adjusting function and a kneading and defoaming method, and in particular, a configuration for preventing moisture from entering due to condensation when kneading and defoaming a composite material such as an adhesive. The present invention relates to a kneading defoaming apparatus with a temperature adjusting function and a kneading defoaming method.

  Conventionally, in various technical fields, in the research and development stage and manufacturing stage, to create a composite material by mixing multiple materials or powdered materials that are liquid or viscous at room temperature and have different characteristics Has been done.

  In this case, in order to make the mixed material a homogeneous composite material, it is necessary to stir and knead, and it is necessary to prevent air bubbles from entering. For this purpose, a kneading and defoaming apparatus with revolution and rotation is required. It is used.

  In such a kneading and defoaming device, the mixed material accommodated in the sealed container by revolution is pressed against the inner wall of the sealed container by centrifugal force to generate a flow parallel to the rotation axis, while the inner wall is rotated along with the rotation of the sealed container. Agitation and defoaming are performed by rotating the mixed material in contact in the rotation direction of the inner wall.

  At this time, the bubbles contained in the mixed material and the bubbles taken in at the beginning of kneading have a lower specific gravity than the composite material formed by kneading, so they are pushed out of the composite material by the revolving or kneading rotation for kneading. Will be defoamed.

  In such a kneading and defoaming step, heating is performed in the case of a mixed material that is easier to knead at a higher temperature, and heat is generated by rotational friction accompanying viscosity, and the generated heat is generated by kneading. Temperature control such as cooling is performed when an undesirable influence is exerted on the characteristics of the composite material.

In order to simplify the temperature control process associated with such a kneading and defoaming process, it has been proposed to heat and cool the container holder using a temperature control pipe that circulates refrigerant and the like (for example, Patent Documents). 1).
JP 2003-071264 A

  However, in the case of a heating / cooling mechanism using a temperature control pipe, since the temperature control pipe is incorporated into a kneading and defoaming apparatus that involves a complicated rotation mechanism of revolution and rotation, the overall apparatus configuration is very high. There is a problem of increasing complexity.

  Also, in the case of heating / cooling using a temperature control pipe, especially in the case of cooling, only the vicinity of the container holder is cooled. In addition, when the sealed container is exposed from the container holder, condensation occurs on the surface of the sealed container itself.

  When the airtight container is opened, water droplets generated by this dew condensation may be mixed into the composite material generated by kneading and defoaming. Become.

  In order to prevent such moisture from entering due to condensation, it can be dried before opening the sealed container or wiped off the moisture adhering to the surface of the sealed container. There is a problem that the efficiency is lowered and the manufacturing cost is increased.

  Therefore, an object of the present invention is to prevent dew condensation that causes undesired moisture mixing with a simple apparatus configuration.

FIG. 1 is a diagram illustrating the basic configuration of the present invention. Means for solving the problems in the present invention will be described with reference to FIG.
In order to solve the above problems, the present invention revolves the container holder 4 that holds and fixes the container 5 containing the material to be kneaded, the rotation mechanism 3 that rotates the container holder 4, and the rotation mechanism 3. A kneading and defoaming device provided with a revolving mechanism 2 that includes a rotating housing 3 and a revolving mechanism 2 that accommodates the revolving mechanism 3, a cooling mechanism 6 that feeds cooling gas 7 into the closed housing 1, and a container holder 4 or a temperature sensor 8 for measuring the temperature of the container 5, closes the temperature and humidity of the housing 1 and a temperature and humidity sensor 9 for measuring, based on the temperature and humidity measured by the temperature and humidity sensor 9 The temperature inside the closed casing 1 is controlled by controlling at least one of the temperature and the flow rate of the cooling gas 7 fed from the cooling mechanism 6 so that no condensation occurs on any surface of the container holder 4 and the container 5. Temperature controller It is characterized by having a structure .

As described above, since the cooling mechanism 6 for sending the cooling gas 7 to the closed casing 1 is not provided, only the container holder 4 or the storage container 5 is cooled. The difference is reduced and condensation is less likely to occur. In particular, since a temperature control mechanism is provided, the occurrence of condensation can be automatically suppressed.

  Moreover, since the temperature sensor 8 for measuring the temperature of the container holder 4 or the container 5 can be provided, the temperature of the container 5 can be maintained at a temperature suitable for the material to be kneaded. A kneading defoaming process is possible.

  Further, by providing the temperature / humidity sensor 9 for measuring the temperature and humidity in the closed casing 1, it is possible to constantly monitor whether the temperature and humidity in the closed casing 1 are the temperature and humidity at which condensation occurs. Therefore, the occurrence of condensation can be reliably prevented.

  In this case, it is desirable to use the non-contact type infrared temperature sensor 8 as the temperature sensor 8, thereby accurately measuring the temperature of the revolving / rotating container holder 4 or the container 5 with a simple configuration. be able to.

Further, as a kneading and defoaming method for kneading and defoaming the material to be kneaded by revolving and rotating the container holder 4 that holds and fixes the container 5 containing the material to be kneaded, the temperature of the container holder 4 or the container 5 is used. The temperature and humidity in the closed casing 1 are measured when the cooling gas 7 is sent into the closed casing 1 based on the measurement result and the temperature of the container holder 4 or the container 5 is maintained below a preset temperature. In addition, at least one of the temperature and flow rate of the cooling gas 7 is controlled so that no dew condensation occurs in either the container holder 4 or the container 5, and the temperature of the container holder 4 or the container 5 is controlled by the cooling action of the cooling gas 7. If dew condensation occurs when the temperature is maintained below a preset temperature, at least one of the revolution speed and the rotation speed is reduced .

  By adopting such a configuration, no condensation occurs in the container 5, so that no moisture is mixed into the material to be kneaded when the material to be kneaded is taken out from the container 5 after the kneading and defoaming step.

In particular, when dew condensation occurs when the temperature of the container holder 4 or the container 5 is maintained below a preset temperature by the cooling action of the cooling gas 7, at least one of revolution or rotation, typically rotation. Thus, the frictional heat generated by the kneading can be reduced, and the kneading and defoaming treatment at a temperature suitable for the material to be kneaded can be performed.

  According to the present invention, when the kneading and defoaming treatment is performed under a suitable temperature condition, it is possible to automatically and reliably prevent the occurrence of dew condensation accompanying the cooling of the container with a simple apparatus configuration and man-hours. As a result, the work efficiency can be improved and the cost can be reduced.

  The present invention relates to a kneading and defoaming apparatus in which a container holder that holds and fixes a sealed container containing a material to be kneaded, a rotation mechanism that rotates the container holder, and a revolution mechanism that revolves the rotation mechanism are housed in a closed casing. A cooling mechanism that sends cooling gas into the closed casing is provided, and a temperature sensor that measures the temperature of the container holder or the sealed container, typically a contact-type infrared temperature sensor, and the temperature and humidity in the closed casing are measured. A temperature / humidity sensor is provided, and the temperature of the sealed container is cooled with a cooling gas so as to maintain the temperature of the sealed container at a temperature suitable for the material to be kneaded by the temperature sensor, and closed by the temperature / humidity sensor. Temperature control is performed so that the temperature and humidity in the housing do not become the temperature and humidity at which condensation occurs.

  Further, when condensation occurs when the temperature of the container holder or the container is maintained below a preset temperature by the cooling action by the cooling gas, it is generated by kneading by reducing at least one of the revolution speed and the rotation speed. The frictional heat is reduced to maintain a temperature suitable for the material to be kneaded.

Here, with reference to FIG.2 and FIG.3, the kneading | mixing deaeration process of Example 1 of this invention is demonstrated.
See Figure 2
FIG. 2 is a conceptual configuration diagram of the kneading and defoaming device used in the kneading and defoaming process of Example 1 of the present invention. The housing main body 11 and the housing main body 11 are opened and closed via a packing 13. The revolving rotary motor 21 is rotatably supported in the housing 10 formed of the lid member 12 that freely rotates and closes the housing main body 11, and the rotation motor 24 is rotatably supported. The revolution member 22 is accommodated.

  A container holder 25 for holding and fixing a sealed container 26 containing a material to be kneaded is fixed to the rotation shaft of the rotation motor 24 for rotation, and the container holder 25 is rotated along with the rotation of the rotation motor 24 for rotation. Therefore, the sealed container 26 rotates.

  In this case, the rotating shaft of the rotating rotary motor 24 is inclined inward with respect to the rotating shaft of the revolving rotary motor 21, and the material to be kneaded accommodated in the closed container 26 by the revolving is centrifuged by the centrifugal force. Press against the inner wall to generate a flow parallel to the rotation axis.

The casing 10 is provided with a cooling gas introduction pipe 14, which is connected to a cooler 16 via an electromagnetic valve 15, and cooling air 17 is supplied from the cooler 16. The sealed container 25 is cooled by being sent into the housing 10.
The cooling air 17 sent into the inside is exhausted to the outside through an exhaust port (not shown).

In addition, an infrared detector 27 is installed in the fixing portion 23 of the revolving member 22 and detects infrared rays generated in the container holder 25.
The measured infrared detection force is transmitted to the temperature measuring device 28 through wiring (indicated by a broken line in the figure) provided inside the revolution member 22 and inside the rotation shaft of the revolution motor 21 for revolution. The converted container temperature information is output to the temperature control device 20.

  Further, the housing 10 is provided with a thermometer 29 for measuring the temperature of the housing 10 and a hygrometer 30 for measuring the humidity. Temperature information and humidity information in the housing as a result of the measurement are the temperature control device 20. Is output.

  Based on the container temperature information, the temperature information in the housing, and the humidity information, the cooling temperature in the cooler 16 is controlled by the command from the temperature control device 20, and the opening and closing of the electromagnetic valve 15 is controlled to control the housing 10 The temperature and flow rate of the cooling gas 17 fed into the inside are controlled.

See Figure 3
FIG. 3 is a flowchart of the kneading and defoaming step of Example 1 of the present invention,
First, after the airtight container 26 containing the material to be kneaded is held and fixed to the container holder 25, the rotation mechanism is driven to rotate and rotate to start kneading and defoaming.
In the initial state, the atmosphere inside the housing 10 is normal temperature and normal pressure.

Next, the temperature of the container holder 25 is monitored by the infrared detector 27 and the temperature measuring device 28, and when the temperature exceeds a preset temperature due to the rotational friction of the material to be kneaded, the electromagnetic valve 15 is opened and the cooling air is opened. 17 is sent into the housing 10 to cool the hermetic container 26 so as to be equal to or lower than the set temperature.
Since the sealed container 26 is in contact with the container holder 25, the temperature of the sealed container 25 can be estimated from the temperature of the container holder 25.

  The kneading and defoaming process in this case will be described as a process for producing a conductive adhesive material. As a material to be kneaded, for example, a mixture of a thermosetting adhesive and Ag powder in a weight ratio of 15:85 is contained in the sealed container 26. And the set temperature is set to 5 ° C., for example, rotation and revolution are performed at a rotational speed of 2000 rpm.

At this time, the temperature and humidity of the atmosphere inside the housing 10 are measured by the thermometer 29 and the hygrometer 30 to monitor whether or not the temperature and humidity at which dew condensation occurs.
When the possibility of dew condensation increases, the dew generation is prevented by increasing the temperature of the cooling air 17 and / or decreasing the flow rate.

See Figure 4
FIG. 4 is a diagram showing the temperature dependency of the saturated water vapor amount. The data on the temperature dependency of the saturated water vapor amount is stored in the memory unit in the temperature control device 20 and measured by the thermometer 29 and the hygrometer 30. Judge the possibility of condensation from the measured temperature and humidity.
Note that it is determined empirically by repeating the experiment at which point the temperature of the cooling air 17 is increased or the flow rate is decreased.

Next, when the preset processing time is reached, the kneading and defoaming process is finished, the sealed container 26 is removed from the container holder 25, the removed sealed container 26 is opened, and the kneading and defoaming is finished. The agent is taken out from the sealed container 26 and the whole process is completed.
At this time, since water droplets accompanying dew condensation are not attached to the surface of the sealed container 26 or the container holder 25, undesired moisture is not mixed into the conductive adhesive taken out from the sealed container 26.

  Thus, in the first embodiment of the present invention, the cooling gas 17 is directly fed into the housing 10 without using the circulation of the refrigerant, so that only the container holder 25 or the sealed container 26 is not cooled, Since the temperature difference with the ambient temperature inside the housing 10 is reduced, condensation is less likely to occur.

  Moreover, since the temperature of the container holder 25 or the sealed container 26 is constantly measured and maintained at a temperature suitable for the material to be kneaded containing the temperature of the sealed container 26, kneading and defoaming treatment in an optimum state is possible. Become.

  Furthermore, since the temperature and humidity in the housing 10 are always measured and at least one of the temperature or flow rate of the cooling gas 17 is controlled so that condensation does not occur, it is possible to reliably prevent the occurrence of condensation. Thereby, moisture is not mixed into the finished kneaded composite material.

Next, the kneading and defoaming step of Example 2 of the present invention will be described with reference to FIG.
See Figure 5
FIG. 5 is a flowchart of the kneading and defoaming step of Example 2 of the present invention,
First, after the airtight container 26 containing the material to be kneaded is held and fixed to the container holder 25, the rotation mechanism is driven to rotate and rotate to start kneading and defoaming.
In the initial state, the atmosphere inside the housing 10 is normal temperature and normal pressure.

  Next, the temperature of the container holder 25 is monitored by the infrared detector 27 and the temperature measuring device 28, and when the temperature exceeds a preset temperature due to the rotational friction of the material to be kneaded, the electromagnetic valve 15 is opened and the cooling air is opened. 17 is sent into the housing 10 to cool the hermetic container 26 so as to be equal to or lower than the set temperature.

  At this time, the temperature and humidity of the atmosphere inside the housing 10 are measured by the thermometer 29 and the hygrometer 30 to monitor whether or not the temperature and humidity at which dew condensation occurs.

Next, when the amount of frictional heat generated is large and further cooling is required to maintain the temperature of the sealed container 26 below a preset temperature, and as a result, a condition that causes condensation is reached, the temperature control device The temperature of the sealed container 26 is set in advance without causing condensation by reducing the number of revolutions of the rotating motor 21 for rotation or the rotating motor 24 for rotation by a command from 20 and reducing the amount of frictional heat generated. Maintain below.
Normally, the rotational speed of the rotating motor 24 for rotation, which has a large effect on friction, is reduced.

Next, when the preset processing time is reached, the kneading and defoaming process is finished, the sealed container 26 is removed from the container holder 25, the detached sealed container 26 is opened, and the kneaded defoaming is finished. Is taken out from the sealed container 26 as a kneaded composite material, and the whole process is completed.
In addition, when the rotation speed of the revolution motor 21 or the rotation motor 24 is decreased, the processing time is extended according to the decrease in the rotation speed so that sufficient kneading is performed.

  In the second embodiment of the present invention, the amount of generated frictional heat is reduced by feeding back the temperature / humidity information inside the housing 10 to the revolution / spinning mechanism to reduce the rotational speed, thereby the sealed container 26. Since the temperature is always maintained below a preset temperature, kneading and defoaming treatment can be performed under suitable conditions.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the configurations and conditions described in the embodiments, and various modifications are possible. For example, in the above embodiments, Although the temperature of the container holder is measured, the temperature of the sealed container itself may be directly measured.

In this case, an opening may be provided at the bottom of the container holder to detect infrared rays generated from the sealed container exposed from the opening.
In this case, only the temperature of the sealed container can be reliably measured by intermittently measuring the infrared detection timing in synchronization with the rotation of the sealed container.

  Further, in each of the above embodiments, when detecting the temperature of the container holder or the sealed container, the output from the infrared detector is led to the temperature measuring device via the wiring. And the detection result may be transmitted wirelessly to the temperature measuring device, whereby the arrangement of the wiring cable or the like on the movable portion is not necessary.

In each of the above embodiments, the temperature is measured using a non-contact type infrared temperature sensor, but a contact type temperature sensor may be used.
In this case, the contact-type temperature sensor may be brought into close contact with the bottom or side surface of the container holder, or in close contact with the top surface of the sealed container, and the measurement result may be transmitted wirelessly (note that the exposure apparatus). For example, Japanese Patent Laid-Open No. 2001-338869 discloses that a measurement result is transmitted wirelessly in order to eliminate the need for a wiring cable or the like with respect to the movable part.

  In addition, the revolution / rotation mechanism in the above-described embodiment is merely an example, and can be applied to a kneading and defoaming apparatus including various revolution / rotation mechanisms. Instead of the cooling mechanism using the temperature control pipe in the apparatus, the cooling mechanism of the present invention is provided, and the condensation prevention mechanism or the condensation prevention method of the present invention may be employed at that time.

  As an application example of the present invention, a kneading and defoaming treatment of a composite material for electronic parts such as an adhesive for electronic parts is typical. However, the present invention is not limited to a composite material for electronic parts. It is also applicable to the kneading and defoaming process of other composite materials such as dyes, pigments or foods, and the material is not limited to liquid or viscous liquids, but also powder or filler The present invention is also applicable to the kneading and defoaming step of the composite material containing the solid matter.

It is explanatory drawing of the fundamental structure of this invention. It is a notional block diagram of the kneading | defoaming apparatus used for the kneading | mixing defoaming process of Example 1 of this invention. It is a flowchart of the kneading | mixing defoaming process of Example 1 of this invention. It is a figure which shows the temperature dependence of saturated water vapor | steam amount. It is a flowchart of the kneading | mixing defoaming process of Example 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Closed housing | casing 2 Revolution mechanism 3 Autorotation mechanism 4 Container holder 5 Container 6 Cooling mechanism 7 Cooling gas 8 Temperature sensor 9 Temperature / humidity sensor 10 Housing 11 Housing body part 12 Lid member 13 Packing 14 Cooling gas introduction pipe 15 Electromagnetic Valve 16 Cooling machine 17 Cooling air 20 Temperature control device 21 Revolving rotary motor 22 Revolving member 23 Fixed part 24 Rotating rotary motor 25 Container holder 26 Sealed container 27 Infrared detector 28 Temperature measuring device 29 Thermometer 30 Hygrometer

Claims (3)

A kneading and defoaming apparatus comprising: a container holder that holds and fixes a container that contains a material to be kneaded; a rotation mechanism that rotates the container holder; and a revolution mechanism that revolves the rotation mechanism,
A closed housing for accommodating the rotation mechanism and the revolution mechanism;
A cooling mechanism for sending cooling gas into the closed casing;
A temperature sensor for measuring the temperature of the container holder or the container;
A temperature / humidity sensor for measuring temperature and humidity in the closed casing ;
Based on the temperature and humidity measured by the temperature / humidity sensor, at least one of the temperature and flow rate of the cooling gas fed from the cooling mechanism is controlled so that no condensation occurs on the surface of either the container holder or the container. A temperature control mechanism for controlling the temperature in the closed casing by
A kneading and defoaming device with a temperature adjusting function, comprising The kneading and defoaming device with a temperature adjusting function according to claim 1, wherein the temperature sensor is a non-contact infrared temperature sensor. A kneading and defoaming method for carrying out kneading and defoaming of a material to be kneaded by revolving and rotating a container holder for holding and fixing a container containing the material to be kneaded,
When the cooling gas is sent into the closed casing based on the measurement result of the temperature of the container holder or the storage container and the temperature of the container holder or the storage container is maintained below a preset temperature, the temperature in the closed casing and The humidity is measured, and at least one of the temperature and flow rate of the cooling gas is controlled so that no dew condensation occurs on the surfaces of the container holder and the storage container, and the container holder or the storage container is cooled by the cooling gas. A kneading and defoaming method characterized in that, when dew condensation occurs when the temperature is maintained below a preset temperature, at least one of the revolution speed and the rotation speed is reduced .

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