JP5532288B2 - Release agent supply device - Google Patents

Description

  The present invention relates to a release agent supply apparatus for applying a powder release agent to a cavity of a molding mold.

  There exists patent document 1 shown below as prior art document information relevant to this kind of mold release agent supply apparatus. The release agent supply device described in Patent Document 1 includes a release agent tank that stores a release agent, a vertical relay chamber that is provided between the cavity and the release agent tank, and communicates with the cavity. An extraction device that extracts a predetermined amount of release agent from the release agent tank and supplies it to the relay chamber, and when the predetermined amount of release agent is supplied into the relay chamber, the release agent is pumped by air into the cavity And a pressure feeding mechanism. Therefore, the mold release agent extracted almost accurately by the extraction device can be pumped into the cavity.

  Furthermore, there is Patent Document 2 shown below as other prior art document information related to this type of release agent supply apparatus. In the release agent supply apparatus described in Patent Document 2, a diffusion portion having an inner diameter larger than that of the pipe connecting the relay chamber and the cavity is provided between the relay chamber (supply pipe) and the cavity. For this reason, the release agent is dispersed in the diffusion portion due to diffusion accompanying a rapid increase in the diameter when flowing into the diffusion portion, so that the effect that uniform adhesion is performed is described.

Japanese Patent Laying-Open No. 2003-275855 (paragraph 0029, FIG. 4) JP 2004-223562 A (paragraph 0022, FIG. 5)

  However, in the release agent supply apparatus described in Patent Document 1, the pressure feeding mechanism sends out the release agent accumulated in a lump on the bottom side of the relay chamber with air, so that the release agent continues at a uniform speed. In some cases, the thickness of the release agent applied in the cavity is not uniform because the pressure is not pumped. In that case, if the release agent is too thin, problems such as seizure of the molded product may occur, and if the release agent is too thick, the release agent may enter the surface of the molded product and gasify, thereby reducing the quality. there were.

  The release agent supply device described in Patent Document 2 can be expected to be pumped in a state in which the release agent is somewhat dispersed as compared with the device described in Patent Document 1, but the air for pumping is used. Since the flow rate of the liquid drops rapidly in the diffusion part with a large volume, some mold release agent may fall freely in the diffusion part and accumulate on the bottom of the diffusion part, resulting in unstable supply to the cavity. There was a tendency to become. In addition, since it is necessary to provide a relatively large diffusion part, it is necessary to supply a large amount of air when pumping, and an extra space for providing the diffusion part is still unsolved. Met.

  Accordingly, an object of the present invention is to provide a release agent supply apparatus capable of continuously pumping a release agent at a uniform speed in view of the problems given by the conventional techniques exemplified above. Another object of the present invention is to provide a release agent supply device that can easily stabilize the supply amount of the release agent to the cavity, can carry out pressure feeding with a relatively small amount of air, and can make the entire device more compact. There is.

The first characteristic configuration of the release agent supply apparatus according to the present invention is:
A release agent tank for storing a powder release agent to be applied to the cavity of the molding mold;
A dispersion chamber provided between the cavity and the release agent tank and in communication with the cavity;
An extraction device for extracting a predetermined amount of the release agent from the release agent tank and supplying it to the dispersion chamber;
An agitator for dispersing the release agent supplied to the dispersion chamber in the dispersion chamber;
A pumping mechanism for pumping the release agent in the dispersion chamber with air to the cavity;
A controller for controlling the driving of the agitator unit, and for driving the pumping mechanism while the release agent is dispersed in the dispersion chamber by the agitator unit ,
The agitator section is disposed below the dispersion chamber, and is opened at a position offset from the axis of the dispersion chamber, and includes an auxiliary air supply section that supplies an air flow into the dispersion chamber,
The pressure feeding mechanism is disposed above the dispersion chamber, and is deviated from the axis of the dispersion chamber so as to supply spiral air in the direction opposite to the air flow supplied from the auxiliary air supply unit. It is in the point which consists of the main air supply part opened in .

In the release agent supply apparatus according to the first characteristic configuration of the present invention, the release agent supplied to the dispersion chamber is stirred and dispersed by the agitator unit, and is sent while being released, The release agent is pumped in a state of being well dispersed without being agglomerated. As a result, the release agent can be continuously pumped at a uniform speed (see FIG. 4), and the supply amount of the release agent to the cavity is easily stabilized (see FIG. 5). Furthermore, since it is not necessary to provide a specially large volume diffusion section, it is possible to carry out the pressure feeding with a relatively small amount of air, and to suppress the enlargement of the entire apparatus.
The agitator section includes an auxiliary air supply section that supplies a dispersion air flow into the dispersion chamber.
For this reason, as compared with the case where a mechanical dispersing means such as a beater is used as the agitator section, the number of parts to which the release agent adheres and accumulates is reduced, and the maintenance of the apparatus is facilitated.
In addition, the auxiliary air supply unit is disposed below the dispersion chamber.
For this reason, it is possible to supply an air flow from the lower part of the dispersion chamber, and the auxiliary air supply unit is relatively free from the configuration in which the air flow is supplied to the release agent from the middle part or the upper part of the dispersion chamber. Even with a small amount of air, efficient dispersion can be obtained in a short time.
Further, the auxiliary air supply part is opened at a position deviated from the axis of the dispersion chamber.
For this reason, a vortex-like air flow that rotates in one of the left and right directions along the inner surface of the dispersion chamber is generated, so that more efficient dispersion can be obtained.
The pressure feeding mechanism is disposed above the dispersion chamber, and at a position deviated from the axis of the dispersion chamber so as to supply spiral air in the direction opposite to the air flow supplied from the auxiliary air supply unit. It consists of the main air supply part opened.
For this reason, the air flow supplied from the main air supply unit creates a vortex that moves downward while rotating in the opposite direction to the spiral air flow formed by the auxiliary air supply unit as the agitator unit. It can be sent out from the dispersion chamber while further increasing the dispersion state of the release agent dispersed by the air supply unit.

  In another feature of the present invention, the dispersion chamber is a sealed space that communicates with the extraction device via a first on-off valve, and communicates with the cavity via a second on-off valve, and the control device includes: While the first on-off valve and the second on-off valve are closed, the agitator unit is driven, and while the release agent is dispersed in the dispersion chamber, the opening of the second on-off valve and the pumping mechanism It is in the point to perform driving.

  With this configuration, the agitator unit disperses the release agent in the dispersion chamber that is sufficiently sealed by closing the first on-off valve and the second on-off valve. There is no possibility that the release agent in the part flows backward to the extraction device or the like. As a result, it is possible to realize sufficient dispersion in a short time by rapid stirring by the agitator section.

  Another feature of the present invention is that the dispersion chamber has a conical surface shape in which the diameter of the upper part is larger than the diameter of the lower part.

  With this configuration, a wide space is secured as a space for dispersion above the dispersion chamber, so that sufficient dispersion can be easily obtained. In addition, since the bottom surface of the dispersion chamber is generally conical, the release agent that cannot be discharged from the dispersion chamber is less likely to accumulate on the bottom of the dispersion chamber.

1 is a schematic view showing a release agent supply apparatus according to the present invention together with an injection molding apparatus. It is sectional drawing which shows the cross section of a dispersion chamber. It is explanatory drawing which shows the process corresponding to each state of a mold release agent supply apparatus. It is a graph which shows the measurement result of the mold release agent passage amount for every elapsed time. It is a graph which shows the measurement result of a mold release agent carrying amount.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated, referring drawings.
FIG. 1 shows an example of an injection molding apparatus provided with a release agent supply apparatus according to the present invention.
The injection molding apparatus 100 includes a mold 2 having a fixed mold 2a and a movable mold 2b, a hot water supply apparatus 4 for supplying a molten metal such as an aluminum alloy to a cavity V of the mold 2, and a release agent supplying apparatus 50. Prepare. The movable mold 2b is supported by the attaching / detaching device 2c so as to be switchable between a casting position in close contact with the fixed mold 2a and a mold release position separated from the fixed mold 2a. As the powder release agent, for example, a mixture of inorganic powder such as graphite and talc and organic powder such as wax, resin and metal soap can be used.

  The hot water supply device 4 includes a hot water supply sleeve 5 attached to a part of the fixed mold 2 a, a hot water supply container (not shown) made of a ladle or the like for pouring molten metal from a hot water supply port 5 a provided in the hot water supply sleeve 5, and a hot water supply sleeve 5. And a plunger 6 for pushing out the poured molten metal into the cavity V. The plunger 6 is reciprocated by a hydraulic cylinder (not shown) or the like. An overflow portion communicating with the cavity V, a gas vent hole communicating with the upper end of the overflow portion, a cooling device for cooling the mold 2, and the like are omitted from the drawing.

(Schematic configuration of release agent supply device)
The release agent supply device 50 includes a release agent tank 7 that stores a powder release agent to be applied to the inner surface of the cavity V, and an extraction device 12 that extracts a predetermined amount of the release agent from the release agent tank 7. And a relay container 13 for once receiving the release agent extracted by the extraction device 12 and a release agent supply pipe 15 extending from the relay container 13 to the cavity V.

A funnel-shaped throttle portion 7 a is provided at the lower part of the release agent tank 7. A plurality of first air supply ports N1 are arranged on the peripheral surface of the throttle portion 7a to prevent the formation of cross-linking by the internal release agent by supplying air.
The release agent tank 7 and the extraction device 12 are connected by a first connection pipe 8a extending vertically. The first connection pipe 8a is provided with a second air supply port N2 for backwashing the release agent that has closed the inside of the first connection pipe 8a.
The extraction device 12 includes a cylinder 9 extending in the lateral direction and a piston 10 that is reciprocally slid inside the cylinder 9 by a hydraulic operation mechanism 9a. The piston part 10 is formed with a vertical hole 10a for receiving a release agent.

The extraction device 12 and the relay container 13 are connected to each other by a straight tubular second connection pipe 8b extending vertically. A first on-off valve PV1 for controlling the passage of the release agent is disposed in the second connection pipe 8b.
The piston portion 10 of the extraction device 12 reciprocates between a receiving position where the vertical hole 10a communicates only with the upstream release agent tank 7 and a supply position where the vertical hole 10a communicates only with the second connecting pipe 8b on the downstream side. Operated.
Further, a third air supply port N3 for sending the release agent in the vertical hole 10a downward by air is disposed on the inner surface of the cylinder 9 facing the first connection pipe 8a.

Inside the relay container 13, a dispersion chamber 14 having a conical inner surface whose inner diameter gradually increases from the lower side to the upper side is formed. Near the upper end of the dispersion chamber 14, a fourth air supply port N <b> 4 (an example of a main air supply unit) is disposed as a pressure feeding mechanism that pumps the release agent in the dispersion chamber 14 to the cavity V with air.
The lower end of the dispersion chamber 14 and the release agent supply pipe 15 are connected in communication by a third connecting pipe 8c having a straight tubular shape extending vertically. The third connecting pipe 8c is provided with a second on-off valve PV2 for controlling the passage of the release agent and a fifth air inlet N5 adjacent to the upper side of the second on-off valve PV2.
In a state where the upper first on-off valve PV1 and the lower second on-off valve PV2 are closed, the dispersion chamber 14 forms a sealed space. The fifth air supply port N5 (an example of the auxiliary air supply unit) functions as an agitator unit that disperses the release agent supplied to the dispersion chamber 14 so as to rise upward in the sealed dispersion chamber 14. Will do.

As shown in FIG. 2, the fourth air supply port N <b> 4 and the fifth air supply port N <b> 5 do not open toward the axis X of the dispersion chamber 14 but open along a tangent to the inner surface of the dispersion chamber 14. Has been. Further, the fourth air supply port N4 and the fifth air supply port N5 are eccentric in the opposite directions with respect to the axis X of the dispersion chamber 14.
In the example of FIG. 2, the fifth air supply port N5 is arranged on the left side with respect to the axis X, so that the air flow supplied from the fifth air supply port N5 is basically a clock as viewed from above. While creating a vortex that progresses in the direction, the release agent located near the bottom of the dispersion chamber 14 is swept up by the spiral air flow that travels upward, and is efficiently dispersed.

  On the other hand, since the fourth air supply port N4 is disposed on the right side with respect to the axis X, the air flow supplied from the fourth air supply port N4 is basically supplied from the fifth air supply port N5. This creates a vortex that travels counterclockwise and downward as seen from above, opposite to the air flow. Accordingly, the release agent that has already been dispersed in the spiral air flow can be sent out from the dispersion chamber while further increasing the dispersion state.

The first to fifth air supply ports N1, N2, N3, N4, and N5 described above are commonly compressed air via an on-off valve and a flow rate adjusting valve (not shown) that are opened and closed by a valve control unit 81 described later. Connected to the source 30. The pressure of the air flow through the fifth air supply port N5 provided as the agitator may be one tenth or less of the pressure of the air flow through the fourth air supply port N4 provided as the pressure feeding mechanism.
Since the inner diameter of the dispersion chamber 14 is set to be not more than twice the inner diameter of the release agent supply pipe 15 even at the upper end portion which is the maximum inner diameter portion, the flow velocity of the air flow through the fourth air supply port N4 is There is little possibility of becoming small inside. Note that the appropriate vertical length inside the dispersion chamber 14 may be, for example, 200 mm when the amount of the release agent to be supplied at one time is 20 g or less.

  An input port 18a for connecting the release agent supply pipe 15 and the cavity V between the end portion of the release agent supply pipe 15 extending to the inside of the movable mold 2b and the cavity V, and this input port A supply shut-off pin 19a that can be controlled to be opened and closed is provided. On the other hand, the fixed mold 2a is provided with an exhaust port 18b for allowing a part of the cavity V to communicate with the atmosphere, and an exhaust shut-off pin 19b capable of controlling the opening and closing of the exhaust port 18b. The supply shutoff pin 19a and the discharge shutoff pin 19b are opened and closed by a solenoid provided in the mold. A recovery device that recovers excess release agent discharged from the cavity V can be connected to the exhaust port 18b.

  As shown in FIG. 2, the injection molding apparatus 100 includes a control unit 70 (an example of a control apparatus). The control unit 70 has a function of controlling various control elements of the casting apparatus 100. For this reason, the control unit 70 is configured as a computer system. The control unit 70 includes, as output devices particularly related to the present invention, actuators that control the opening and closing of the first to fifth air supply ports N1-N5, and the first on-off valve PV1 and the second on-off valve PV2. Each actuator that controls opening and closing is connected.

  In order to process operation signals input from various input devices and output required output signals to the various output devices, the control unit 70 includes a control unit 80 that is substantially composed of a program and a program execution device. It has been. In the control unit 80, the functional unit particularly related to the present invention includes a valve control unit 81 that performs opening / closing control of each of the seven on-off valves, an extraction control unit 82 that drives and controls the extraction device 12, and valve control The pin control unit 83 executes opening / closing control of the shut-off pins 19a and 19b based on the operation of the unit. The control by the valve control unit 81, the extraction control unit 82, and the pin control unit 83 is executed in accordance with a casting (injection molding) operation schedule that is basically determined based on the movement of the plunger 6 of the hot water supply device 4. The

(Operation of release agent supply device)
The operation of the mold release agent supply device 50 according to the present invention will be described along the operation of the injection molding device 100.
First, a single casting (injection molding) operation by the basic injection molding apparatus 100 is a "mold closing" process in which the movable mold 2b is closely fixed to the fixed mold 2a, and the mold release agent supply apparatus 50 releases the mold into the cavity V. A “(release agent) pressure feeding” step of pumping the agent, a “hot water supply” step of pouring a molten metal such as an aluminum alloy from the hot water supply port 5 a into the hot water supply sleeve 4, and the plunger 6 sends out the molten metal to the cavity V of the mold 2. "Injection filling process" for maintaining the pressure by the "solidification / molding" process for solidifying the molten metal in the cavity V by cooling the mold 2 with cooling means (not shown), moving the movable mold 2b after completion of solidification When "mold opening" process to open the mold 2 and "molded product extrusion" process in which the molded product is pushed out from the movable mold 2b with an eject pin (not shown) etc. Next shot "Mold closing" for the (molten metal filling) Back to the process.

  Therefore, the “(release agent) pressure feeding” step by the release agent supply device 50 of the present invention is performed in a short time between the “mold closing” step and the “hot water supply” step. The overall operation of the release agent supply device 50 including the “molding) pressure feeding” step is advanced in the following procedure by the signals output from the valve control unit 81, the extraction control unit 82, and the pin control unit 83. .

(Loading process)
As shown in FIG. 3A, after the piston 10 of the extraction device 12 is pushed out, the second on-off valve PV2 is switched to the closed position and the first on-off valve PV1 is switched to the open position, When blow air is blown downward, the release agent in the vertical hole 10 a is loaded into the dispersion chamber 14 of the relay container 13 and is deposited in the lower portion of the dispersion chamber 14.

(Dispersing process)
Next, as shown in FIG. 3B, the first on-off valve PV1 is switched to the closed position, and the fifth air supply port N5 (an example of the auxiliary air supply unit and the agitator unit) at the lower portion of the dispersion chamber 14 is opened and closed. When the valve is opened, the air blown from the fifth air supply port N5 causes the release agent to rise upward with stirring, and the release agent is dispersed inside the dispersion chamber 14.
In addition, as shown in FIG.3 (b), the piston 10 of the extraction apparatus 12 can be returned to the retraction position in parallel with the dispersion | distribution process.

(Pressing process)
Next, as shown in FIG. 3C, the second on-off valve PV2 and the fourth air supply port N4 (main air supply unit) are simultaneously opened while the release agent is continuously dispersed in the dispersion chamber. When switched to the open position, the release agent dispersed in the dispersion chamber 14 is pumped to the cavity V via the release agent supply pipe 15 by the air blown from the fourth air supply port N4.
Incidentally, in order to smoothly enter the release agent into the cavity V, the supply shut-off pin 19a and the discharge shut-off pin 19b are switched to the open position by the start of the pumping process.

As shown in FIG. 3 (c), in parallel with the pressure feeding process, the release agent tank 7 or the first connection pipe is opened by opening the first supply port N1 and the second supply port N2 for only a few seconds. The release agent in 8a can be supplied into the vertical hole 10a of the piston 10 in the retracted position as a release agent to be pumped for the next shot.
When the pumping process is completed, after the supply shut-off pin 19a and the discharge shut-off pin 19b are switched to the closed position, the “hot water supply” process is performed.

  In addition, as one standard method in the case of using a general mold release agent, the supply duration from the fifth supply port N5 in the dispersion step is a short time such as 0.1 to 0.2 seconds. Assuming that the timing of the start of air supply from the fourth air supply port N4 is 0.1 to 0.3 seconds after the start of air supply from the fifth air supply port N5, the release agent is dispersed. Pumping can be performed in between.

  However, the duration of the dispersion state depends on the flow rate of air supplied from the fifth air supply port N5, the particle size and amount of the release agent, the shape and volume in the dispersion chamber 14, and the like. Therefore, it is preferable that the proper value of the supply air continuation period from the fifth air supply port N5 and the start timing of the pumping process is obtained in advance by experiments.

  Alternatively, the mold release agent may be a method of starting the pressure feeding process from the middle of the air supply continuation period from the fifth air supply port N5, or a method of continuing air supply from the fifth air supply port N5 until the end of the pressure feeding process. The mold release agent can be fed while is dispersed.

As an embodiment of the present invention, an example of the measurement result of the release agent passage amount when the release agent is supplied to the cavity V using the release agent supply device 50 according to the present invention (FIG. 4), and The example (FIG. 5) of the measurement result of the release agent delivery amount of the supplied release agent is shown.
In FIGS. 4 and 5, as a comparative example, measurement was performed under the same conditions for Conventional Technology 1 without a dispersion chamber (corresponding to Patent Document 1) and Conventional Technology 2 with a dispersion chamber (corresponding to Patent Document 2). The results are also shown.

(Amount of release agent passed)
First, the release agent passage amount shown in FIG. 4 is obtained by calculating the mass of the release agent that has been pressure-fed from the release agent supply device and passed through a certain point by the specific position of the release agent supply pipe 15 (Y in FIG. 1). The horizontal axis indicates the elapsed time from the start of pumping, and the vertical axis indicates the release agent that has passed through the Y point. The mass of

  When the result shown in FIG. 4 is seen, in the apparatus of the prior art 1 (two-dot chain line) without the dispersion chamber, a rapid rise in the early stage of the elapsed time and the subsequent very high substantially single peak can be seen. The base of the curve is relatively narrow. This indicates that the release agent is remarkably abruptly passed in a short time from the start of pumping, and the passage is finished in a very short time. Therefore, it is estimated that the release agent of the relay container was sent out in a state close to a lump.

  Next, in the apparatus of the conventional technique 2 (thin solid line) with a dispersion chamber, a rise that is greatly delayed from the conventional technique 1 and a subsequent peak that is not as high as that of the conventional technique 1 are seen. It is wider than the prior art 1. Therefore, the release agent in the relay container is sent out in a more dispersed state than in the case of the prior art 1, and after the release agent in the relay container is reduced, the supply in small quantities continues for a long time. I guess it was. Moreover, since only a substantially single peak is seen like the prior art 1, it is estimated that the uniformity of the passage amount during the pressure feeding was not sufficient.

  On the other hand, in the apparatus according to the present invention (thick solid line), an early and abrupt rise comparable to that of the prior art 1 is observed, followed by a plurality of peaks having a uniform height, and the broadening of the base of the curve has been conventionally achieved. Equivalent to Technology 1. Therefore, the release agent of the relay container was sent out in a state of being better dispersed than in either of the prior art 1 and 2, and almost the entire amount of the release agent of the relay container was pumped in a relatively short time. Is guessed.

(Amount of mold release agent)
The release agent delivery amount shown in FIG. 5 is that the fixed amount of release agent supplied to the relay container is pumped into the cavity, and when a sufficient time has passed since the pumping, The operation of measuring the mass (carrying amount) is repeated 20 times in each apparatus, and the minimum value, maximum value, and average value of the measurement results of 20 times are plotted. In the straight line shown for each apparatus, the lower end represents the minimum value, the upper end represents the maximum value, and the middle black circle represents the average value.
When the result shown in FIG. 5 is seen, in the apparatus of the prior art 2 with the dispersion chamber, there is a tendency that the carry-out amount greatly differs for each measurement, but in the apparatus of the present invention, the prior art 1 without the dispersion chamber. It can be seen that a substantially constant carry-out amount can be obtained as in the case of the apparatus.

[Another embodiment]
<1> The air supply port constituting the auxiliary air supply unit as the agitator unit is not necessarily provided below the dispersion chamber 14 as in the above-described embodiment, and can be provided, for example, near the upper end of the dispersion chamber 14. is there. In this case, a high dispersion effect can be obtained if an air supply nozzle that opens downward along the inner peripheral surface of the dispersion chamber 14 is provided close to the inner peripheral surface as the air supply port.

<2> In the above embodiment, the agitator section is constituted by the auxiliary air supply section that disperses the release agent in the dispersion chamber 14 by the air flow, but the impeller mechanically lifts the release agent upward. Alternatively, a beater may be provided in the dispersion chamber 14 and used as an agitator.

<3> When performing the dispersion step, the dispersion chamber 14 does not necessarily have to be a sealed space. For example, the dispersion is performed in a non-sealed space in which the first on-off valve PV1 that opens and closes the dispersion chamber 14 is opened. You may perform a process.

<4> The dispersion chamber 14 does not necessarily have to be a vertical type, and may be arranged obliquely or horizontally.

  A release agent tank for storing a powder release agent to be applied to the mold cavity, a dispersion chamber communicating with the cavity, and extracting a predetermined amount of the release agent from the release agent tank into the dispersion chamber A technique for improving a release agent supply device, comprising: an extraction device to be supplied; an agitator that disperses the release agent supplied to the dispersion chamber; and a pumping mechanism that pumps the release agent in the dispersion chamber to the cavity. Is available as

N4 4th air supply port (main air supply part)
N5 5th air supply port (auxiliary air supply part, agitator part)
PV1 1st on-off valve PV2 2nd on-off valve V Cavity 2 Mold 7 Release agent tank 10 Piston 12 Extraction device 13 Relay container 14 Dispersion chamber 15 Release agent supply pipe 50 Release agent supply device 70 Control unit (control device)
80 control unit 81 valve control unit 82 extraction control unit 83 pin control unit 100 injection molding apparatus

Claims (3)

A release agent tank for storing a powder release agent to be applied to the cavity of the molding mold;
A dispersion chamber provided between the cavity and the release agent tank and in communication with the cavity;
An extraction device for extracting a predetermined amount of the release agent from the release agent tank and supplying it to the dispersion chamber;
An agitator for dispersing the release agent supplied to the dispersion chamber in the dispersion chamber;
A pumping mechanism for pumping the release agent in the dispersion chamber with air to the cavity;
A controller for controlling the driving of the agitator unit, and for driving the pumping mechanism while the release agent is dispersed in the dispersion chamber by the agitator unit ,
The agitator section is disposed below the dispersion chamber, and is opened at a position offset from the axis of the dispersion chamber, and includes an auxiliary air supply section that supplies an air flow into the dispersion chamber,
The pressure feeding mechanism is disposed above the dispersion chamber, and is deviated from the axis of the dispersion chamber so as to supply spiral air in the direction opposite to the air flow supplied from the auxiliary air supply unit. The mold release agent supply apparatus which consists of the main air supply part opened in .   The dispersion chamber is a sealed space communicating with the extraction device via a first on-off valve, and communicating with the cavity via a second on-off valve, and the control device includes the first on-off valve and the second on-off valve. The agitator section is driven with the on-off valve closed, and the second on-off valve is opened and the pumping mechanism is driven while the release agent is dispersed in the dispersion chamber. The mold release agent supply apparatus of description. The dispersion chamber of the releasing agent supply device according to claim 1 or 2 diameter of the upper portion has the shape of a large, the conical shape than the diameter of the lower portion.

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