JP2023147285A - Viscous fluid discharge system and on-vehicle motor manufacturing device - Google Patents

Abstract

To provide a viscous fluid discharge system which can efficiently heat a viscous fluid to be discharged.SOLUTION: A viscous fluid discharge system has: a stirrer 1 which accumulates a viscous fluid inside; a circulation pump 2 which discharges the fluid from a circulation pump inlet, to which a first piping with an angle of inclination of 8° to 50° downward is connected, to a circulation pump outlet; a dispenser inlet for introducing the viscous fluid thereinto and a dispenser outlet for discharging the fluid that are connected to the circulation pump outlet via a second piping; a flow channel for connection between the dispenser inlet and the dispenser outlet; a discharge port which is connected to the flow channel, and discharges the viscous fluid outside; a dispenser 3 which starts and stops flow of the viscous fluid from the flow channel to the discharge port; a heater for heating the circulation pump 2; and a controller for controlling the circulation pump 2, the dispenser 3, and the heater.SELECTED DRAWING: Figure 1

Description

The present invention relates to a viscous fluid discharging system that controls and discharges viscous fluid, and an apparatus for manufacturing an on-vehicle motor, and more specifically, a viscous fluid discharging system and an on-vehicle motor manufacturing apparatus that are suitable for fluids of several thousand mPa·s to tens of thousands of mPa·s. The present invention relates to a motor manufacturing device.

Automotive motors are becoming smaller and require higher heat dissipation performance. Insufficient heat dissipation not only reduces output but also shortens life. In order to improve heat dissipation performance, fillers, which are viscous fluids made of resin compositions made of inorganic particle materials dispersed in resin materials such as epoxy resins and silicone, are applied to parts that require heat dissipation and fixation, such as stator windings. Filling and sealing is performed. By filling the filler, it is expected to function as a sealing material, an electrical or thermal insulating material, and a heat transfer material. It becomes possible to impart various properties to the filler depending on the type and form of the dispersed filler.

A viscous fluid discharge system used when filling a viscous fluid such as a resin composition constituting a filler includes a viscous fluid supply container that stores the viscous fluid and a dispenser that discharges the viscous fluid (see Patent Document 1, etc.).

Some viscous fluids have a viscosity that changes significantly due to temperature changes, such as a sudden increase in viscosity when the temperature drops, and it is sometimes necessary to increase the temperature of the viscous fluid when operating the device. In such cases, the viscous fluid in the viscous fluid supply container is heated to raise its temperature.

Japanese Patent Application Publication No. 2012-066386

By the way, a viscous fluid discharge system is generally not only operated continuously but also repeatedly operated and stopped. In this case, it was necessary to increase the temperature of the viscous fluid so that it would have an appropriate viscosity when transitioning from the rest state to the operating state.

In addition, if a viscous fluid, which is a resin composition in which a filler is dispersed in a resin material, is left unattended during a shutdown or the like, the filler will settle. By sucking in the viscous fluid from below and discharging it upward, the diaphragm pump can suppress the formation of voids inside the diaphragm pump and can operate reliably. On the other hand, if it is arranged so that it flows from the top to the bottom, the viscous fluid inside will move downward due to gravity, and there is a risk that voids will be created inside.

However, if the viscous fluid is arranged so as to flow from the bottom to the top, there is a risk that the settled filler cannot be properly sucked into the diaphragm pump and the filler may remain in the piping. In particular, if only heating is performed without operating the pump when preparing to start operation, the filler in the viscous fluid will settle when only the viscosity of the viscous fluid existing in the piping decreases.

In particular, the viscosity of viscous fluids increases rapidly when the temperature drops after operation is stopped, so the pipes are designed to have a certain diameter so that they can easily move through the pipes and pumps when reheated. , filler imbalance tends to occur in the cross-sectional direction in piping and pumps.

The present invention was completed in view of the above circumstances, and it is possible to efficiently heat the viscous fluid to be discharged to make it have an appropriate viscosity, and even if the filler contained in the viscous fluid settles, the pump can An object of the present invention is to provide a viscous fluid discharging system that can be easily inhaled, and a manufacturing device for an on-vehicle motor using the viscous fluid discharging system.

A viscous fluid ejection system of the present invention that solves the above problems is a viscous fluid ejection system that controls the ejection operation of a viscous fluid that is a resin composition in which a filler is dispersed in a resin material, the system comprising:
a viscous fluid supply container that stores the viscous fluid therein and has an outlet for discharging the viscous fluid;
a circulation pump connected to the outlet via a first pipe and discharging the viscous fluid from a circulation pump inlet to a circulation pump outlet;
a dispenser inlet that is connected to the circulation pump outlet via a second pipe and into which the viscous fluid is introduced; a discharge port that is connected to the dispenser inlet and discharges the viscous fluid to the outside; and the dispenser inlet and the discharge port. a dispenser that starts or stops the flow of the viscous fluid to the discharge port;
a heating device that heats the circulation pump;
a control device that controls the circulation pump, the dispenser, and the heating device;
has
The circulation pump inlet sucks the viscous fluid from a substantially horizontal direction,
The circulation pump outlet opens above the circulation pump inlet,
The circulation pump is a diaphragm pump and transfers the viscous fluid sucked from the circulation pump inlet upward toward the circulation pump outlet,
The first pipe is attached downward from the outlet provided at the bottom of the viscous fluid supply container, and after being bent midway, it is directed toward the circulation pump inlet at an angle of 8° with respect to the horizontal direction. The piping is directed diagonally downward with an inclination of 50 degrees or less.

When heating the viscous fluid, the viscous fluid can be effectively heated by preferentially heating the circulation pump that transports the viscous fluid. A diaphragm pump can be used as a circulation pump, but when the circulation pump is moved, an external force is applied to the viscous fluid inside, so in addition to the temperature rise due to heat transfer, heating is effectively achieved by the movement of the viscous fluid itself. can be done. In addition, by tilting the first pipe connected to the circulation pump inlet at a certain angle of inclination so that it descends as it goes toward the circulation pump, even if the filler settles, the settled filler moves toward the circulation pump inlet and settles. As a result, the proportion of the filler layer in the cross section of the first pipe near the inlet of the circulation pump can be increased, and the filler that has settled due to the flow of viscous fluid generated by the pump can be effectively sucked into the pump. became.

Particularly, the dispenser has a dispenser outlet that is connected to the flow path and discharges the viscous fluid that has not been discharged to the outside, and the viscous fluid supply container has a dispenser outlet that is connected to the flow path and discharges a part of the viscous fluid that has not been discharged to the outside. It is preferable to have a return port through which all the parts circulate and return, and a third pipe connecting the dispenser outlet and the return port.

Since it has the above configuration, the viscous fluid discharge system of the present invention can quickly start operating from a rest state.

It is a flow diagram showing an outline of a resin composition discharge system of this embodiment (a 1st embodiment). It is a schematic sectional view explaining the stirring device in the resin composition discharge system of this embodiment. 3 is a sectional view taken along line AA in FIG. 2. FIG. It is an enlarged view of the baffle member used for the stirring device of this embodiment. It is a flow diagram showing an outline of a resin composition discharge system of this embodiment (2nd embodiment). It is a graph showing a change in temperature of each part of the viscous fluid discharge system in an example over time.

(Viscous fluid discharge system: first form)
The viscous fluid ejection system of the present invention will be described in detail below based on embodiments. The viscous fluid ejection system of this embodiment is a system that ejects viscous fluid such as a resin composition. An example of the viscous fluid is a liquid resin material. For example, thermosetting resins such as epoxy resin precursors may be used before curing. The resin material contains filler.

As the filler, inorganic particle materials such as alumina and silica, and organic particle materials such as fluororesin can be used. The resin composition can be used for applications such as sealing electrical parts such as motor generators and electronic devices such as semiconductor elements, and improves thermal conductivity by dispersing fillers and improves dimensional stability when heated. has also improved. In particular, as the viscous fluid, it is preferable to use a filler that is used for in-vehicle motors. The filler is used to fill the windings of the stator and/or rotor of an automotive motor, to fill the area around the automotive motor at the location where the automotive motor is mounted, or to fill the wiring that supplies power to the automotive motor. I do things. When filled in these positions, the filler acts as a sealant to block gas and liquid from the outside to the necessary parts of the in-vehicle motor, and prevents the filled parts from being electrically and/or It can act as an insulating material that thermally insulates, or it can act as a heat transfer material that improves thermal conductivity between the filled location and the outside. Furthermore, it is fully possible to expect properties that can be exhibited by resin materials in which fillers are dispersed.

As shown in FIG. 1, the resin composition discharging system of the present embodiment includes a stirring device 1 as a viscous fluid supply container, a circulation pump 2 for delivering the resin composition flowing out from the stirring device 1, and a circulation pump 2. Between the dispenser 3 that discharges part or all of the delivered resin composition to the outside, the first pipe 4a that communicates between the stirring device 1 and the circulation pump 2, and the circulation pump 2 and the dispenser 3 (dispenser inlet) A second pipe 4b that communicates between the dispenser 3 (dispenser outlet) and the return port 12 of the stirring device 1, and a third pipe 4c that communicates between the dispenser 3 (dispenser outlet) and the return port 12 of the stirring device 1; It has a tank 7, a heating device (not shown) that heats the resin composition present in these devices, and a control device (not shown) that controls these devices. In this embodiment, by providing a flow path for returning the resin composition from the dispenser outlet to the return port 12 of the stirring device 1, the resin composition flowing inside the first pipe 4a to the third pipe 4c can also be quickly heated. It becomes possible.

The heating device is capable of heating at least the resin composition present in the circulation pump 2. Even when heating other parts, since it is efficient to heat the circulation pump 2 as quickly as possible, the heating means is controlled by the control device to heat the circulation pump 2 earlier than other parts. Preferably controlled.

The circulation pump 2 can be heated by disposing a heater on the outside and heating from the outside, or by disposing a heater inside and heating from the inside. When heating the stirring device 1 and the charging tank 7, the stirring tank 10 and the charging tank 7 can be surrounded by a heater, or a heater can be placed inside the stirring tank 10 and the charging tank 7. As a method of heating the dispenser 3, a heater may be disposed on the outside to heat it from the outside, or a heater may be disposed inside and heated from the inside. As a method of heating the first pipe 4a to the fourth pipe 4d, there is a method of disposing a heater on the outside and heating them from the outside. The heating device has a temperature measuring means for measuring the degree of heating. The temperature measurement means is a means for measuring or estimating the temperature of the resin composition, and includes a means for directly measuring the temperature of the resin composition, and a means for estimating the temperature by measuring some index related to the temperature of the resin composition. can be adopted. Examples of some index related to the temperature of the resin composition include the temperature of something other than the resin composition (such as the surface temperature of the circulation pump 2 in the case of heating the circulation pump 2), the amount of heat generated by the heater, and the like.

The resin composition dispensing system of this embodiment circulates the resin composition stored in the stirring device 1 through the first pipe 4a to the third pipe 4c using the circulation pump 2, and the dispenser 3 circulates the resin composition stored in the stirring device 1 through the second pipe 4b as necessary. This is a system that discharges the resin composition from the outside. The inner surface of the piping is lined with fluororesin, which reduces friction during movement of the viscous fluid and allows the viscous fluid to be transferred efficiently, which is preferable.

The resin composition is a mixture of a filler made of silica particle material and a resin material that is an epoxy resin precursor that disperses the filler, and the filler settles over time. Therefore, the resin composition is stirred using the stirring device 1 to prevent the filler from settling. When the resin composition becomes low, the resin composition is replenished from the input tank 7 into the stirring device 1.

When the resin composition is not discharged to the outside by the dispenser 3, the resin composition flows out from the stirring device 1 and flows back into the stirring device 1 through the first pipe 4a to the third pipe 4c. This flow is carried out by a circulation pump 2. Since the viscosity of the resin composition varies greatly depending on temperature, the resin composition is heated to a certain level or higher using a heating device.

Since the epoxy resin precursor of the resin composition is polymerized and solidified by heating, the polymerization rate at a temperature where the viscosity can be sufficiently lowered is tolerably low, and the heating during curing ensures that the polymerization rate is sufficiently low and effective. The type of epoxy resin precursor is selected so that the process proceeds. The viscosity of the resin composition is preferably 2,000 mPa·s or more and 70,000 mPa·s or less as measured by a B-type viscometer.

Circulation pump 2 is a diaphragm pump. The circulation pump 2 has a circulation pump inlet 2a that opens at the bottom and sucks viscous fluid from a substantially horizontal direction. The circulation pump 2 transfers the viscous fluid sucked in from the circulation pump inlet 2a which opens downward, to the upper part of the circulation pump 2, and discharges it from the circulation pump outlet 2b which opens upward.

The first pipe 4a connected to the circulation pump inlet 2a is a pipe that connects between the lower center of the stirring device 1 and the circulation pump inlet 2a, and is a pipe that connects from the part extending vertically downward from the stirring device 1. It is bent at a bent portion 4a1 and is piped diagonally downward toward the circulation pump inlet 2a. The angle of inclination of the oblique part is 8° or more and 50° or less, and the lower limit values are 9°, 10°, 11°, etc., and the upper limit values are 45°, 40°, 35°, 30°, etc. I can give an example. These upper and lower limit values can be arbitrarily combined. The filler that has settled because the first pipe 4a is inclined downward according to the flow of the viscous fluid moves as close as possible to the circulation pump inlet 2a, so that as much as possible is present near the circulation pump inlet 2a. can. As a result, according to the flow of the viscous fluid, it becomes easier to suck the filler into the circulation pump 2 from the circulation pump inlet 2a, and the unevenness of the filler can be suppressed.

The dispenser 3 is connected to a flow path that connects the dispenser inlet connected to the second pipe 4b and a discharge port through which the resin composition is discharged as needed, and is connected to a flow path that connects the dispenser inlet connected to the second pipe 4b and a discharge port through which the resin composition is discharged as needed. It has a dispenser outlet which is discharged and connected to the third pipe 4c. The method of controlling the discharge of the resin composition from the discharge port is not particularly limited, and may be controlled by flowing the resin composition from the dispenser inlet to the dispenser outlet to the discharge port by a pump, or by opening and closing a valve. You can As the dispenser 3, a mono dispenser, a diaphragm pump, a tube pump, a plunger pump, a bellows pump, an electromagnetic metering pump, etc. can be adopted.

The stirring device 1 supplies viscous fluid, and as shown in FIG. 2, includes a stirring tank 10, stirring blades 20, a liquid level gauge 30, a baffle member 40, a drive unit (motor 50), and a control for controlling these. It has a device (not shown).

The stirring tank 10 is a tank body with a substantially cylindrical outer peripheral surface. The upper part of the stirring tank 10 can be sealed with a lid 11. A motor 50 is fixed to the center of the lid 11, and a rotating shaft 21 projects downward from the lower center of the lid 11. The motor 50 has a speed reducer (not shown) and outputs rotational power from an output shaft (not shown).

Since the stirring blades 20 are rotationally driven in the stirring tank 10, the more the shape departs from the cylindrical shape, the more the portion that is not stirred increases. Therefore, by bringing the outer circumferential surface of the stirring tank 10 closer to a cylinder, the portion that is not stirred is reduced as much as possible. The shape of the bottom surface of the stirring tank 10 is not particularly limited, and examples include a part of a spherical surface, a conical shape whose diameter decreases downward, and a flat surface.

The stirring tank 10 has an outflow port (not shown) near the center of the bottom, and a return port 12 and an input port 13 above the outer peripheral surface. One end of the first pipe 4a is connected to the outlet, and the resin composition flows in the outward direction F and flows out to the outside. One end of the third pipe 4c is connected to the reflux port, and the resin composition flows in the internal direction R and refluxes into the stirring tank 10 from the outside.

The stirring blade 20 has a rotating shaft 21, a base portion 22a, and blade portions 22b and 22c. The rotating shaft 21 is disposed near the center of the stirring tank 10 so as to extend in the vertical direction, and is coaxially connected to the output shaft of a motor 50 fixed to the top of the lid 11. A base portion 22a is fixed near the tip of the rotating shaft 21 (at the bottom of the drawing). In particular, the position where the base portion 22a is fixed to the rotating shaft 21 is preferably within a range of 20% or less from the bottom of the stirring tank based on the maximum liquid level in the stirring tank 10.

The base 22a is fixed to the rotating shaft 21 at a central portion and extends outward from the fixed portion along the bottom surface of the stirring tank 10. Wing portions 22b extend upward from both tips of the base portion 22a along the outer peripheral surface of the stirring tank 10.

In the stirring blade 20, the outer shape of the base portion 22a and the blade portions 22b and 22c has a shape that roughly follows the inner surface shape of the stirring tank 10. Therefore, the resin composition stored in the stirring tank 10 can be efficiently stirred. The average value of the gap between the stirring blades 20 and the inner surface of the stirring tank 10 is preferably 6 mm or less, more preferably 4 mm or less.

The stirring direction of the stirring blades 20 is not particularly limited, but since the appropriate shape of the baffle member 40, which will be described later, differs depending on the stirring direction of the stirring blades 20, it is preferable to use the same stirring direction for the same device.

The lowermost portion W on the upper side of the base portion 22a is preferably within a range of 20% or less from the bottom surface of the stirring tank 10 based on the maximum liquid level in the stirring tank 10. The lower this position is, the deeper the liquid level gauge 30 can be inserted. The upper ends of the blade parts 22b and 22c are preferably 80% or more from the bottom of the stirring tank 10 based on the maximum liquid level.

The liquid level gauge 30 is a capacitive sensor that measures the height of the liquid level by contacting the resin composition. As shown in FIG. 3, the liquid level gauge 30 is disposed at a position where it does not interfere with the rotation of the wing parts 22b and 22c. Then, the baffle member 40 is placed against the level gauge 30 so that the swirling flow of the resin composition generated counterclockwise when viewed from above by the rotation of the blades 22b and 22c does not directly hit the level gauge 30. 20 (clockwise direction in FIG. 3). The baffle member 40 has a plate-like baffle member 41 and a cylindrical baffle member 42. As shown in FIG. 4, the plate-shaped baffle member 41 is a vertically long rectangular member that is bent so that its horizontal cross section is L-shaped. A cylindrical baffle member 42 made of punched metal surrounds the liquid level gauge 30 from slightly above the maximum liquid level to slightly below the bottom of the liquid level gauge 30. By setting the hole diameter of the punching metal to about 1 mm to 10 mm, the resin composition can pass through to about 1 mm, while the resin composition hits the liquid level gauge 30 and the apparent resin composition measured by the liquid level gauge 30. The rise in the liquid level can be suppressed.

(Other aspects of the viscous fluid discharge system: second form)
As shown in FIG. 5, the viscous fluid discharging system of this embodiment is different from the viscous fluid of the first embodiment shown in FIG. It has the same configuration as the discharge system. Note that by eliminating the third pipe 4c, the dispenser outlet of the dispenser 3 and the recirculation port of the stirring tank 10 are eliminated. Note that although FIG. 5 shows the viscous fluid discharging system of the second embodiment, members having the same functions as the viscous fluid discharging system of the first embodiment are designated by the same reference numerals as in the viscous fluid discharging system of the first embodiment. It is explained with .

The viscous fluid discharge system of this embodiment is always in a pressurized state by the pump 2, and the amount of resin composition discharged from the discharge port is adjusted by controlling the dispenser 3.

In the viscous fluid discharging system of the present embodiment (second embodiment), in the first embodiment, out of the resin composition that has flowed out from the stirring device 1, what is not discharged from the discharge port of the dispenser 3 is returned into the stirring device 1. While the third pipe 4c was provided, the present embodiment differs in that all the resin composition flowing out from the stirring device 1 is discharged from the discharge port of the dispenser 3. In the viscous fluid discharge system of the first embodiment, the amount of the resin composition flowing out from the stirring device 1 can be arbitrarily determined as long as it is equal to or greater than the discharge amount from the discharge port of the dispenser 3, and can be made constant if necessary. However, in this embodiment, the flow rate discharged from the discharge port of the dispenser 3 directly becomes the flow rate from the stirring device 1.

(Automotive motor manufacturing equipment)
The in-vehicle motor manufacturing apparatus of this embodiment includes a viscous fluid discharge system for filling the windings of the stator and/or rotor of the in-vehicle motor with a filler, and other means selected as necessary.

An on-vehicle motor is a motor mounted on a vehicle, particularly a motor for driving the vehicle. Motors installed in vehicles are often used under severe conditions, and many require proper sealing. Examples of vehicles include motors mounted on general vehicles such as automobiles, motorcycles, and motorized bicycles, industrial vehicles, and railway vehicles. The viscous fluid discharge system included in the on-vehicle motor manufacturing apparatus of this embodiment discharges a filler material as a viscous fluid to the stator windings to seal the stator windings.

As the viscous fluid ejection system, the viscous fluid ejection system of the present embodiment described above can be adopted as it is, so further explanation will be omitted.

Other means selected as necessary include a winding device for winding the stator windings, a curing device for curing the discharged filler by heating it, and a filling device for dispersing inorganic particle materials in a resin material. A filler preparation device for preparing filler material is exemplified.

The viscous fluid ejection system of the present invention will be described in detail based on examples. A test is conducted using an epoxy resin as a viscous fluid and a viscous fluid discharge system shown in FIG.
The viscous fluid discharge system is equipped with an independently controllable heating device that heats each of the stirring tank 10 and the first piping 4a to the third piping 4c from the outside as a heating device, and simultaneously starts the circulation pump 2. Heating is started using these heating devices.

・First condition: The above heating condition ・Second condition: In addition to the above heating condition, an immersion heater as a heating device is introduced into the stirring tank 10, and a heating device that heats the circulation pump 2 from the outside is provided. Heating starts at the same time as the circulation pump 2 is started. - Third condition: In addition to the above heating conditions, a heating device for heating the circulation pump 2 from the outside is provided, and heating is started at the same time as the circulation pump 2 is started.

FIG. 6 shows the results of measuring the temperature inside the stirring tank 10, the temperature immediately before the dispenser 3, and the air temperature over time when the operation was performed under the above conditions.

As is clear from the figure, under conditions 2 and 3 in which the circulation pump 2 is provided with a heating device, the rate of temperature rise in front of the dispenser 3 is higher than in condition 1 in which the heating device is not provided in the circulation pump 2. High temperatures were reached early on. Therefore, it has become possible to quickly bring the temperature of the resin composition discharged from the dispenser 3 to the target temperature.

Comparing Conditions 2 and 3, it was found that although the rate of temperature rise in the stirring tank 10 varied greatly depending on whether there was a heater inserted into the stirring tank 10, there was no significant difference in the rate of temperature rise in front of the dispenser 3. .

From the above results, it has become clear that the circulation pump 2 is preferable as a site for disposing the heating device.

1... Stirring device 2... Circulation pump 3... Dispenser 4a to 4d... First pipe to fourth pipe 10... Stirring tank 11... Lid body 20, 25... Stirring blade 21, 26... Rotating shaft 22a, 27a, 27b... Base 22b , 22c, 27c, 27d... wing section 30... liquid level gauge 51, 52... baffle member (51... plate-shaped baffle member, 52... cylindrical baffle member)
50...Motor

Claims (6)

A viscous fluid discharge system that controls the discharge operation of a viscous fluid that is a resin composition in which a filler is dispersed in a resin material, the system comprising:
a viscous fluid supply container that stores the viscous fluid therein and has an outlet for discharging the viscous fluid;
a circulation pump connected to the outlet via a first pipe and discharging the viscous fluid from a circulation pump inlet to a circulation pump outlet;
a dispenser inlet that is connected to the circulation pump outlet via a second pipe and into which the viscous fluid is introduced; a discharge port that is connected to the dispenser inlet and discharges the viscous fluid to the outside; and the dispenser inlet and the discharge port. a dispenser that starts or stops the flow of the viscous fluid to the discharge port;
a heating device that heats the circulation pump;
a control device that controls the circulation pump, the dispenser, and the heating device;
has
The circulation pump inlet sucks the viscous fluid from a substantially horizontal direction,
The circulation pump outlet opens above the circulation pump inlet,
The circulation pump is a diaphragm pump and transfers the viscous fluid sucked from the circulation pump inlet upward toward the circulation pump outlet,
The first pipe is attached downward from the outlet provided at the bottom of the viscous fluid supply container, and after being bent midway, it is directed toward the circulation pump inlet at an angle of 8° with respect to the horizontal direction. Piping is directed diagonally downward with an inclination of at least 50 degrees or less,
Viscous fluid dispensing system. The dispenser has a dispenser outlet that is connected to the flow path and discharges the viscous fluid that has not been discharged to the outside,
The viscous fluid supply container has a return port through which part or all of the discharged viscous fluid circulates and returns,
The viscous fluid dispensing system according to claim 1, further comprising a third pipe connecting the dispenser outlet and the return port. The heating device includes at least one of the viscous fluid supply container, the second pipe, and the dispenser, and/or the third pipe if the heating device has the third pipe. The viscous fluid discharge system according to claim 1 or 2, wherein the other parts including the first pipe are heated. The viscous fluid discharge system according to claim 1 or 2, wherein the inner surface of at least the first pipe is lined with a fluororesin. a temperature sensor that directly or indirectly measures the circulation pump temperature, which is the temperature of the viscous fluid in the circulation pump;
The viscous fluid discharge system according to claim 1 or 2, wherein the control device starts driving the circulation pump after the temperature of the circulation pump reaches a predetermined temperature or higher. The viscous fluid is a filler,
An on-vehicle motor manufacturing apparatus having a viscous fluid discharge system according to claim 1 or 2, wherein the viscous fluid is discharged to windings of a stator and/or a rotor.

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