WO2019216208A1

WO2019216208A1 - Device for monitoring supplying of release agent and device for spraying release agent onto glass bottle forming die

Info

Publication number: WO2019216208A1
Application number: PCT/JP2019/017269
Authority: WO
Inventors: 河原隆介; 石黒翔太
Original assignee: 日本山村硝子株式会社
Priority date: 2018-05-07
Filing date: 2019-04-23
Publication date: 2019-11-14
Also published as: TW201946696A; JP2019196275A; TWI774952B; JP6511565B1

Abstract

Provided are: a device for monitoring the supplying of a release agent, the device being capable of accurately detecting abnormal spraying of a release agent having a high viscosity; and a device for spraying a release agent onto a glass bottle forming die. A device 50 for monitoring the supplying of a release agent is provided with a detection unit 51. The detection unit 51 detects a release agent L1 to check for abnormal spraying of the release agent L1 in a release agent spraying device 3. The detection unit 51 has optical sensors 52, 53 that generate different results according to whether or not the release agent L1 is detected.

Description

Release agent supply monitoring device and release agent spraying device for glass bottle mold

The present invention relates to a release agent supply monitoring device and a release agent spraying device to a glass bottle molding die.

A fluid supply device may be used in a factory or the like (for example, see Patent Document 1). The fluid supply apparatus described in Patent Literature 1 includes a syringe pump, and a liquid is sent in a pressurized state by the syringe pump.

By the way, in the glass bottle manufacturing process, a gob (a high-temperature molten glass lump) is usually formed into a parison with a rough mold. Next, the parison is transferred to a finishing mold and inflated with compressed air in the finishing mold to be finally molded. Thereby, the molding of the glass bottle is completed. In molds such as rough molds and finish molds, lubricity and releasability are greatly required, and it is important to apply a mold release agent (the mold release agent here has a lubricating action). . Therefore, the mold release agent needs to be applied to the inner surface of the mold periodically, for example, every few tens of minutes in order to prevent deterioration of lubricity and mold release characteristics.

Japanese Patent No. 4957957

Release agents are usually highly viscous. When the release agent is sprayed on the inner surface of the mold by the spray nozzle, the release agent having a high viscosity may be clogged by the nozzle. If the release agent is clogged with the nozzle, an appropriate amount of the release agent cannot be sprayed onto the mold. For this reason, it is important to make it possible to detect abnormal spraying of the release agent in the production of glass bottles of uniform quality.

The present invention has been made in view of the above circumstances, and a release agent supply monitoring device capable of more accurately detecting an abnormal spraying of a highly viscous release agent, and a release to a glass bottle mold It aims at providing an agent spraying device.

(1) In order to solve the above-mentioned problem, a release agent supply monitoring device according to an aspect of the present invention is the release agent in the release agent spraying device for spraying the release agent onto the glass bottle molding die. In order to confirm the presence or absence of spray abnormality, a detection unit for detecting the release agent is provided.

According to this configuration, when the detection unit detects the release agent, it is possible to more accurately detect the spray abnormality related to the release agent having a high viscosity.

(2) The detection unit is installed in a pump that supplies the release agent to a spray nozzle of the release agent spraying device, and the pump sucks the release agent with a working fluid and the release agent. In some cases, the detection unit may detect a volume change of the release agent in the syringe.

According to this configuration, the detection unit can detect the release agent spray abnormality more accurately by detecting the volume change of the release agent as an element having a large change in the syringe at the time of spraying the release agent.

(3) The syringe may have a port through which the working fluid passes and a release agent storage portion in which the release agent is stored.

According to this configuration, the detection unit can detect an abnormality in spraying of the release agent, for example, by detecting a change in volume of the release agent in the release agent storage unit.

(4) The detection unit may detect the presence or absence of abnormal spraying of the release agent by detecting a change in the liquid level position of the release agent in the release agent storage unit.

According to this configuration, the detection unit can detect a spraying abnormality of the release agent with a simple configuration that detects a change in the liquid level position of the release agent.

(5) The detection unit may include an optical sensor that detects light.

According to this configuration, the optical sensor of the detection unit can detect the release agent in a non-contact manner. Thereby, the release agent having a high viscosity does not stick to the optical sensor.

(6) The syringe may include a light transmitting part, and the optical sensor may detect the release agent through the light transmitting part.

This structure can more reliably prevent the optical sensor from coming into contact with the release agent. Moreover, it is not necessary to embed the optical sensor in the syringe, and the degree of freedom of the installation position of the optical sensor in the syringe can be further increased.

(7) The syringe may have an inner diameter of 3.0 mm to 6.0 mm.

According to this configuration, if the inner diameter of the syringe is less than 3.0 mm, the release agent remaining on the inner peripheral surface (wall surface) of the syringe after the release of the release agent is caught by surface tension to form a bridge (air It will be in a state of being involved). If suction is performed in this state, the detection unit misidentifies the bridge portion, not the original liquid level, as the liquid level, and the syringe cannot suck a predetermined amount and cannot perform quantitative discharge at the next discharge. In addition, the release agent having a high viscosity sticks to the inner peripheral surface of the syringe, and it is difficult to move it smoothly in the syringe, and it becomes easier to form a bridge. On the other hand, by setting the inner diameter of the syringe to 3.0 mm or more, the fluidity of the release agent in the syringe can be increased, the smooth movement of the release agent in the syringe accompanying the drive of the pump can be realized, and the bridge is formed. Can also be suppressed. As a result, the release agent can be detected more accurately by the detection unit. Moreover, when the internal diameter of a syringe exceeds 6.0 mm, the change of the flow rate of a mold release agent with respect to the liquid level change of the mold release agent in a syringe will become large. For this reason, the change of the liquid level position of a mold release agent when a mold release agent is suck | inhaled in a syringe and the liquid level position of a mold release agent when a mold release agent is discharged from a syringe become small. For this reason, it becomes difficult for the detection unit to accurately detect the state change of the release agent. That is, by making the inner diameter of the syringe 6.0 mm or less, the change in the liquid level of the release agent in the syringe accompanying the driving of the pump can be further increased. Thereby, the detection part can detect a mold release agent more correctly.

(8) The syringe has a port through which the working fluid passes, and a release agent storage portion in which the release agent is stored, and a critical surface on an inner peripheral surface of the release agent storage portion of the syringe The tension may be 30 mN / m or less.

According to this configuration, the wettability of the release agent with respect to the inner peripheral surface of the syringe can be further reduced. Thereby, the release agent in the syringe is more smoothly transferred as the pump is driven. Therefore, the state change detection of the release agent by the detection unit can be performed more accurately.

(9) The pump has a piston disposed in the syringe, and the piston is moved in an advance / retreat direction along the axial direction of the syringe by the working fluid, and the release agent is sucked by the advance / retreat movement. And may discharge.

According to this configuration, since the piston is provided, the entire release agent in the syringe including the release agent near the inner peripheral surface (wall surface) of the syringe can be smoothly transferred as the piston moves.

(10) The detection unit may detect the position of the piston in the forward / backward direction.

According to this configuration, the detection unit can detect more accurately whether or not the release agent is being discharged from the syringe as set by detecting the movement of the piston.

(11) The detection unit may include a probe that is displaced in the advance / retreat direction in conjunction with the advance / retreat movement of the piston.

According to this configuration, the detection unit can detect the movement of the piston through the displacement of the probe, that is, the spraying condition of the release agent.

(12) The probe may be disconnected from the piston and maintained at a certain position when the advance displacement amount of the piston at the time of discharging the release agent is equal to or greater than a predetermined value.

¡According to this configuration, the allowable value of the probe movement amount is less than the maximum movement amount of the piston. For this reason, the sensitivity of the probe (the gain of the probe output with respect to the movement of the piston) can be increased. Thereby, the detection part can detect the state change of the mold release agent in the syringe more accurately.

(13) At least a part of the probe may be accommodated in the syringe.

プローブ According to this configuration, the probe is protected by the syringe. Therefore, it can suppress more reliably that the detection value in a detection part becomes an abnormal value because a probe contacts a foreign material.

(14) The release agent supply monitoring device may further include a stopper for restricting the displacement of the piston in the advance / retreat direction to a predetermined range.

According to this configuration, the movement amount of the piston does not need to be too large. For this reason, the allowable value of the movement amount of the probe may be small. For this reason, the sensitivity of the probe can be increased. Thereby, the detection part can detect the state change of the mold release agent in the syringe more accurately. Moreover, when the suction | inhalation more than setting is performed by pressure abnormality etc., damage to a detection part can be prevented.

(15) In order to solve the above-described problem, according to an aspect of the present invention, a release agent spraying device includes the release agent supply monitoring device, a pump that supplies the release agent, and a discharge from the pump. A spray nozzle for spraying the released release agent.

According to this configuration, it is possible to detect the release agent spray abnormality more accurately by the release agent supply monitoring device. Thereby, the spray abnormality of the mold release agent from the spray nozzle to the glass bottle molding die can be detected more reliably and early. As a result, it is possible to reduce the number of discards when a product defect occurs in a glass bottle manufactured with a glass bottle molding die. Therefore, the yield of the glass bottle can be further increased.

According to the present invention, it is possible to more accurately detect the spray abnormality of the release agent having a high viscosity.

It is a typical top view of the glass bottle manufacturing device concerning one embodiment of the present invention, and a part is omitted and simplified. It is a typical side view of a glass bottle manufacturing apparatus, and has shown a part abbreviate | omitting and showing a part. It is a typical side view of the mold release agent spraying apparatus of a glass bottle manufacturing apparatus. It is a typical side view around a mold release agent pump of a mold release agent spraying device, and a part is shown with a section. FIG. 5A is a view showing the suction operation of the release agent pump, and FIG. 5B is a view showing the discharge operation of the release agent pump. It is a figure which shows the principal part of one modification of this invention. It is a typical side view of the mold release agent spraying apparatus which concerns on another modification. FIG. 8A is a view showing the main part of the modification shown in FIG. 7, and shows a state where the piston is located at the upper limit position. FIG. 8B is a diagram showing the main part of the modification shown in FIG. 7, and shows a state where the piston is located at the lower limit position.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a schematic plan view of a glass bottle manufacturing apparatus 1 according to an embodiment of the present invention, and a part thereof is omitted and simplified. FIG. 2 is a schematic side view of the glass bottle manufacturing apparatus 1, in which a part is shown in cross section and a part is omitted. FIG. 3 is a schematic side view of the release agent spraying apparatus 3 of the glass bottle manufacturing apparatus 1. FIG. 4 is a schematic side view of the periphery of the release agent pump 30 of the release agent spraying apparatus 3, and a part thereof is shown in cross section.

1 to 4, glass bottle manufacturing apparatus 1 (hereinafter also simply referred to as manufacturing apparatus 1) forms gob 101 (molten glass lump) into parison 102, and further, parison 102 is converted into a glass bottle. 103. The gob 101 is supplied to the manufacturing apparatus 1 from a gob supply mechanism (not shown). Further, in the present embodiment, the manufacturing apparatus 1 can simultaneously mold two gobs 101 for each section 2 into the glass bottle 103. In addition, some manufacturing apparatuses 1 can form one, three, and four gobs 101 for each section 2 into the glass bottle 103 at the same time, and the number that can be simultaneously formed in one section is not limited to two.

The manufacturing apparatus 1 has a plurality of sections 2 and a release agent spraying apparatus 3.

The sections 2 are provided, for example, 8 to 12, and are arranged at substantially equal intervals along a predetermined arrangement direction A1. The total length of these sections 2 in the arrangement direction A1 is about 6 m to 8 m.

Each section 2 has a rough mold part 5, a mouth mold part 6, and a finishing mold part 7.

The rough mold portion 5 is used to form the gob 101 into the parison 102 in cooperation with the mouth mold portion 6. The rough mold part 5 is supplied (filled) with the gob 101 from the above-described gob supply mechanism.

The rough mold portion 5 has two rough molds 8 and a rough mold opening / closing mechanism (not shown).

Each rough mold 8 has a pair of

split molds

8a and 8b facing each other. These split

molds

8a and 8b are combined with each other to form a cavity 8c for filling the gob 101. The pair of

split molds

8a and 8b of each coarse mold 8 is opened and closed by a coarse mold opening / closing mechanism (not shown).

When the gob 101 is formed into the parison 102, the mouth mold 9 of the mouth mold portion 6 is disposed on the lower surface of the rough mold 8. The mouth mold portion 6 is provided for molding the mouth portion 103 a from the gob 101. Further, the mouth mold 6 is configured to transfer the parison 102 molded by the rough mold 8 to the finishing mold 7.

The mouth part 6 has two mouth molds 9, a mouth holder 10 that supports these mouth molds 9, a rotary shaft 11 to which the mouth holder 10 is attached, and a mouth opening / closing mechanism (not shown). is doing.

Each mouth mold 9 has a pair of

semi-cylindrical split molds

9a, 9b facing each other, and these

split molds

9a, 9b are combined with each other to form a cylindrical mouth mold 9. Yes. The

split molds

9a and 9b are appropriately switched between an open state separated from each other and a closed state closed from each other by the operation of an opening / closing mechanism (not shown). When the gob 101 is formed into the parison 102, a part of the mouth mold 9 is fitted into the rough mold 8.

The mouth holder 10 is an arm member formed in an L shape in this embodiment. The base end of the mouth holder 10 is attached to a horizontally extending rotary shaft 11, and the mouth holder 10 and the mouth die 9 can turn around the central axis of the rotary shaft 11 by a rotating mechanism (not shown). is there. By this turning operation, the mouth mold 9 reciprocates between a position below the rough mold 8 (position in FIG. 1) and a position above the finishing mold portion 7.

The finishing mold part 7 has two finishing molds 12, two bottom molds 13, and a finishing mold opening / closing mechanism (not shown).

Each finishing mold 12 molds the glass bottle 103 by molding a part of the parison 102 excluding the mouth 103a in cooperation with the corresponding bottom mold 13. Each finishing mold 12 has a pair of

split molds

12a and 12b facing each other. The pair of

split molds

12a and 12b of the finishing mold 12 are opened and closed by a finishing mold opening / closing mechanism. The finished mold 12 is formed by combining these

split molds

12a and 12b.

The inner surface of the finishing die 12 and the upper surface of the bottom die 13 form a cavity 12c into which a portion other than the mouth portion 103a of the parison 102 is inserted. A coating layer is formed on the inner surface of the finishing die 12 and the upper surface of the bottom die 13 by carbon coating or the like. Further, a release agent L1 is periodically applied to the inner surface by the spray device 3. The mold release agent L1 is for making it easy to release the glass bottle 103 from the finishing mold 12 and the bottom mold 13.

In the finishing mold portion 7, most of the parison 102 is molded into the glass bottle 103 by supplying compressed air for molding from a blow head (not shown) toward the parison 102 disposed in the cavity 12 c. . Thereafter, the glass bottle 103 is taken out from the finishing mold 12 by a take-out arm (not shown).

The mold release agent L1 for ensuring the mold release property (ease of separation) between the finishing mold 12 and the glass bottle 103 is applied between the molding processes of the glass bottle 103. In order to apply the release agent L1, a release agent spraying device 3 is used. Hereinafter, the release agent spraying device 3 is also simply referred to as a spraying device 3.

噴霧 One spraying device 3 is provided in the plurality of sections 2 with respect to the finishing mold part 7. That is, the release agent L 1 is sprayed from one spraying device 3 to all finishing mold parts 7.

In the present embodiment, the configuration of the release agent spray on the rough mold portion 5 and the mouth mold portion 6 will not be described. However, the release agent spray on the rough mold portion 5 and the mouth mold portion 6 is performed with the spray device 3. You may carry out by the spraying apparatus of the same structure.

As the release agent L1 applied by the spraying device 3, mineral oil containing graphite particles as a solid lubricant can be exemplified. The color of the release agent L1 is black. Further, it is preferable that the viscosity when a # 4LVＬ spindle is rotated for 30 seconds with a B-type viscometer according to the ASTM-D2196 standard at a measurement temperature of 25 ° C. is 1000 cps or less.

In this embodiment, the spraying device 3 is configured to apply the release agent L1 to at least a part of the inner surface of the finishing mold 12 and the bottom mold 13 where the cavity 12c is formed.

The spray device 3 includes a transport mechanism 15, a nozzle 16 that sprays the release agent L 1, a displacement mechanism 17 that displaces the nozzle 16, and a release agent supply unit 18 that supplies the release agent L 1 to the nozzle 16. , A control unit 19 that controls the transport mechanism 15, the displacement mechanism 17, and the release agent supply unit 18, and a release agent supply monitoring device 50.

The transport mechanism 15 is provided to displace the nozzle 16, the displacement mechanism 17, the release agent supply unit 18, and the control unit 19 along the arrangement direction A1. The conveyance mechanism 15 arrange | positions the nozzle 16 to the side of the finishing mold part 7 sprayed with the mold release agent L1. The transport mechanism 15 includes a rail 20 extending along the arrangement direction A1, a base member 21 that moves on the rail 20, and a drive mechanism (not shown) that provides the base member 21 with a driving force in the arrangement direction A1. Z). A displacement mechanism 17, a release agent supply unit 18, and a control unit 19 are installed on the base member 21.

The nozzle 16 is used for spraying the release agent L1. The nozzle 16 is formed in an elongated rod shape. The same number of nozzles 16 as the number of finishing dies 12 in one section 2 are provided, and two nozzles 16 are provided in this embodiment. Each nozzle 16 is formed to a length that allows at least the tip of the nozzle 16 to be inserted into the cavity 12c. Each nozzle 16 may spray the release agent L1 while ascending, may spray the release agent L1 while descending, or after being inserted into the cavity 12c, the nozzle 16 is stopped and released. The mold L1 may be sprayed. Spray nozzles 16 a are formed at the tip and middle of the nozzle 16. The diameter of the spray port 16a is set to about 1 mm or less, for example. The mold release agent L1 is sprayed from the spray port 16a so as to form, for example, full cone spray patterns B1 and B2.

The base end portion of each nozzle 16 is fixed to a hollow shaft-like manifold 22. A passage for the release agent L1 is formed in the manifold 22, and the release agent L1 passes through the passage in the nozzles 16 through the manifold 22 and is sprayed from the corresponding spray ports 16a.

When the release agent is sprayed by the nozzle 16, the nozzle 16 may be displaced up and down by the displacement mechanism 17 with respect to the finishing mold 12, or may be stationary.

The displacement mechanism 17 is used for displacing the nozzle 16 with respect to the finishing mold 12 and maintaining the position of the nozzle 16. The displacement mechanism 17 is formed using, for example, a multi-joint robot such as a six-axis robot. The displacement mechanism 17 is not particularly limited as long as at least the nozzle 16 can be taken in and out of the cavity 12c of the finishing die 12. A manifold 22 is fixed to the distal end portion of the displacement mechanism 17. As a result, the manifold 22 and the nozzle 16 are displaced integrally with the distal end portion of the displacement mechanism 17.

The release agent supply unit 18 is provided to supply the release agent L1 to the nozzle 16 via the manifold 22.

The release agent supply unit 18 includes a release agent tank 28, a release agent pump 30, and a release agent supply monitoring device 50.

The compressed air is supplied from a compressed air supply source 26 including a compressor or the like (not shown) installed at a position away from the release agent supply unit 18 to a release agent tank 28 and a regulator 35 described later of the release agent pump 30. Supplied.

The release agent tank 28 is a tank in which the release agent L1 is stored. The release agent tank 28 is connected to the compressed air supply source 26 via the regulator 27. The air pressure adjusted by the regulator 27 is acting on the release agent L1 in the release agent tank 28.

The release agent pump 30 is provided to supply the release agent L1 toward the nozzle 16 at a predetermined pressure. In this embodiment, the release agent pump 30 is a positive displacement pump, which is a kind of reciprocating pump. The release agent pump 30 sucks and discharges the release agent L1 using the compressed air supplied from the compressed air supply source 26 as a working fluid.

The release agent pump 30 includes a check valve 31, a relay pipe 32, an on-off valve 33, a syringe 34, and a regulator 35.

The check valve 31 is connected to the release agent tank 28 and the relay pipe 32. Although the check valve 31 allows the release agent L1 to move from the release agent tank 28 to the relay pipe 32, the check valve regulates the backflow of the release agent L1 from the relay pipe 32 to the release agent tank 28. It is.

The relay pipe 32 is a pipe connecting the check valve 31 (release agent tank 28), the syringe 34, and the nozzle 16 (hose 36). The relay pipe 32 is a T pipe, for example, and has three ports, and a check valve 31, a syringe 34, and an on-off valve 33 are connected to these three ports, respectively.

The on-off valve 33 is, for example, a needle valve, and can be switched between a fully open state and a fully closed state by being given predetermined pilot air. The on-off valve 33 is connected to the manifold 22 via, for example, a flexible hose 36. The release agent L1 that has passed through the on-off valve 33 reaches the nozzle 16 through the hose 36 and the manifold 22, and is sprayed from the spray port 16a of the nozzle 16.

The syringe 34 alternatively performs an operation of sucking the release agent L1 by compressed air and an operation of discharging the release agent L1. The syringe 34 is a member formed in an elongated cylindrical shape, and the mold release agent L1 and compressed air are introduced therein. The syringe 34 is supplied with both high-pressure compressed air and a high-pressure release agent L1. Further, the syringe 34 can discharge the release agent L1 in the syringe 34 evenly by the operation of the compressed air, so that a more even amount of the release agent can be applied to the release agent spraying target portion of the finishing die 7. It is important to apply L1. Moreover, the syringe 34 is arrange | positioned in the vicinity of each finishing mold part 7 of high temperature. For this reason, the material constituting the syringe 34 is required to have heat resistance. The syringe 34 is optically monitored by the release agent supply monitoring device 50 for the state of the release agent L1. For this reason, the syringe 34 is formed with the material which has translucency. That is, in this embodiment, the whole syringe 34 is a translucent part which has translucency. Moreover, it is preferable that the inner peripheral surface 34a of the syringe 34 has low wettability of the release agent L1. Further, the volume change of the release agent L1 in the syringe 34, that is, the discharge amount of the release agent L1 in one release agent spraying operation of the release agent pump 30 is as small as about 0.3 g. And critical surface tension (gamma) c in the internal peripheral surface 34a (The internal peripheral surface of the mold release agent accommodating part 38 mentioned later) of the syringe 34 is preferable is 30 mN / m or less, and it is more preferable that it is 25 mN / m or less.

As a material of the syringe 34 that is preferable for use in the above-described environment, a material that is a transparent tube and excellent in chemical resistance and pressure resistance is preferable. As such a material, fluororesins such as PTFE (polytetrafluoroethylene) and PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer resin) are particularly preferable, and other examples include silicone resins.

In this embodiment, the syringe 34 is formed in a cylindrical shape that extends straight, and in the present embodiment, extends vertically. The inner diameter D1 of the syringe 34 is preferably 3.0 mm to 6.0 mm. More specifically, the lower limit of the inner diameter D1 of the syringe 34 is preferably 4.0 mm or less, and more preferably 3.0 mm. The upper limit of the inner diameter D1 of the syringe 34 is preferably 6.0 mm or less, and more preferably 5.0 mm.

The syringe 34 has a release agent port 37, a release agent storage portion 38, a compressed air storage portion 39, and a compressed air port 40.

The release agent port 37 is a port through which the release agent L1 flows in and out, and is connected to the relay pipe 32. In this embodiment, the release agent port 37 is disposed at the lower end of the syringe 34. The release agent port 37 is continuous with the release agent accommodating portion 38. The release agent container 38 is a portion where the release agent L1 is stored. The upper limit position P 1 of the release agent accommodating portion 38 is set closer to the compressed air port 40. The upper limit position P1 is the highest position of the liquid level L1a (upper surface) when the release agent L1 is sucked into the syringe 34.

The lower limit position P4 of the release agent accommodating portion 38 is set closer to the release agent port 37. The lower limit position P4 is the position of the liquid level L1a when the discharge of the release agent L1 from the syringe 34 to the nozzle 16 is completed, and is the lowest position of the release agent L1 in the syringe 34. The lower limit position P4 is a position where the release agent L1 is always present at least at this position when no abnormality occurs in the release agent pump 30. As described above, the discharge amount of the release agent L1 in one release agent spraying operation of the release agent pump 30 is as small as about 0.3 g. For this reason, the distance between the upper limit position P1 and the lower limit position P4 is actually as small as about several tens of millimeters. In the case where the inner diameter D1 of the syringe 34 is 6.0 mm, the distance (liquid level fluctuation amount) between the upper limit position P1 and the lower limit position P4 is about 10 mm.

The compressed air port 40 is a port through which compressed air as a working fluid passes, and is connected to the compressed air supply source 26 via a 90-degree elbow 41 and a regulator 35, for example. In the present embodiment, the compressed air port 40 is disposed at the upper end of the syringe 34. The compressed air port 40 is continuous with the compressed air accommodating portion 39. The compressed air accommodating part 39 is a part where compressed air is stored. A part of the compressed air storage unit 39 is also a release agent storage unit 38. The lower limit position of the compressed air storage portion 39 when the maximum amount of the release agent L1 is stored in the release agent storage portion 38 is the same as the upper limit position P1. Further, the lower limit position of the compressed air storage unit 39 when the discharge operation of the release agent L1 from the release agent storage unit 38 to the nozzle 16 is completed is the same as the lower limit position P4.

The regulator 35 is provided to adjust the pressure of the compressed air supplied from the compressed air supply source 26 into the syringe 34. The regulator 35 includes, for example, a pressure increasing valve, an open valve that releases a certain amount of compressed air to the atmosphere, and an electromagnetic solenoid that opens and closes the open valve, and is supplied with compressed air by receiving a predetermined electrical signal. This is an electropneumatic regulator that selectively performs the operation of adjusting the pressure of the compressed air from the source 26 and the operation of releasing at least a part of the compressed air to the atmosphere. The regulator 35 is controlled by the control unit 19.

The control unit 19 has a configuration for outputting a predetermined output signal based on a predetermined input signal, and can be formed using, for example, a programmable controller (PLC). The controller 19 may be formed using a computer including a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory).

The control unit 19 is configured to control the displacement operation of the nozzle 16 and the operation of supplying the release agent L1 from the release agent pump 30 to the nozzle 16 (spraying operation of the nozzle 16). The spray control of the release agent L1 from the nozzle 16 to the finishing mold part 7 includes control of the spray amount itself from the nozzle 16, control of the ascending / descending speed of the nozzle 16 with the spray amount fixed, and nozzle 16 Can be performed by controlling the spraying timing of the release agent L1. Of course, the desired application can also be achieved by on / off control of the spray of the release agent L1 from the nozzle 16.

The control unit 19 is connected to the transport mechanism 15, the displacement mechanism 17, the opening / closing valve 33 of the release agent pump 30, and the release agent discharge regulator 35. And controls the release agent pump 30. The control unit 19 gives a predetermined command signal to the transport mechanism 15 to drive the electric motor of the transport mechanism 15 and arranges the transport mechanism 15 and the nozzles 16 at predetermined positions in the arrangement direction A1. Further, the control unit 19 gives a predetermined command signal to the displacement mechanism 17 to drive the electric motor of the displacement mechanism 17, and the nozzle 16 together with the distal end portion of the displacement mechanism 17 is directed to the finish mold portion 7 to be sprayed. Displace.

Further, the control unit 19 controls supply of compressed air to the syringe 34 and discharge of compressed air from the syringe 34 by controlling the regulator 35. The control unit 19 controls the opening / closing operation of the opening / closing valve 33. Accordingly, the control unit 19 controls the supply of the release agent L1 from the release agent pump 30 to the nozzle 16.

With the above configuration, when the release agent L1 is sucked into the syringe 34 of the release agent pump 30, the control unit 19 closes the on-off valve 33 and controls the regulator 35, whereby the compressed air storage unit of the syringe 34 is controlled. The air pressure in 39 is made lower than the pressure of the regulator 27 that adjusts the internal pressure of the release agent tank 28 (compressed air is released from the regulator 35). As a result, as shown in FIG. 5A, the compressed air in the compressed air accommodating portion 39 of the syringe 34 is released to the atmosphere through the regulator 35, and the volume of the compressed air in the syringe 34 is reduced. At this time, the release agent L1 from the release agent tank 28 pushes up the valve body 31a of the check valve 31 and enters the release agent accommodating portion 38 of the syringe 34 through the relay pipe 32. When the release agent L1 reaches the upper limit position P1, the control unit 19 controls the regulator 35 to adjust the air pressure in the compressed air storage unit 39 of the syringe 34 to the internal pressure of the release agent tank 28. The pressure is set to be higher than the pressure 27 (the release of compressed air from the regulator 35 is stopped). Thereby, the valve body 31a of the check valve 31 is closed, and the inflow of the release agent L1 into the syringe 34 is stopped.

Next, the control unit 19 opens the on-off valve 33 as shown in FIGS. 3 and 5B. Thereby, the compressed air whose pressure is adjusted by the regulator 35 pushes out the release agent L1 in the syringe 34. As a result, the release agent L1 reaches the nozzle 16 via the relay pipe 32, the on-off valve 33, the hose 36, and the manifold 22, and is sprayed from the spray port 16a. When the upper end position of the release agent L1 in the syringe 34 reaches the lower limit position P4, the control unit 19 closes the on-off valve 33. Thereby, spraying of the release agent L1 from the release agent pump 30 is completed.

With reference to FIG. 3 and FIG. 4, a release agent supply monitoring device 50 (hereinafter, also simply referred to as a monitoring device 50) is provided in order to detect the presence / absence of abnormality in the release agent spray device 3. ing.

The release agent supply monitoring device 50 includes a detection unit 51 and a control unit 19. That is, the control unit 19 is a control unit of the spray device 3 and is also an element of the release agent supply monitoring device 50.

The detection unit 51 is configured to detect the release agent L1 in order to confirm the presence or absence of spray abnormality of the release agent L1 in the release agent spraying device 3. The detection unit 51 is installed in the release agent pump 30 that supplies the release agent to the nozzle 16.

In this embodiment, the detection unit 51 detects a change in the volume of the release agent L1 in the syringe 34. More specifically, the detection unit 51 detects the presence or absence of a spray abnormality of the release agent L1 by detecting a change in the position of the liquid level L1a of the release agent L1 in the release agent storage unit 38 of the syringe 34. To do.

The detection unit 51 includes

optical sensors

52 and 53 that detect light. The

optical sensors

52 and 53 are fixed to the outer periphery of the syringe 34. Each

optical sensor

52, 53 has a light receiving portion. Then, each of the

optical sensors

52 and 53 outputs a signal corresponding to the intensity of light detected by the light receiving unit to the control unit 19 as a detection signal. Each of the

optical sensors

52 and 53 only needs to output a signal corresponding to the intensity of light detected by the light receiving unit as a detection signal, and the specific principle is not limited.

The optical sensor 52 is installed in the upper detection position P2 in the vicinity of the upper limit position P1 and below the upper limit position P1, and when the release agent L1 exists at the upper detection position P2, the release agent L1. A different detection signal is output when the signal is not present at the upper detection position P2. The optical sensor 53 is installed at the lower detection position P3 in the vicinity of the lower limit position P4 and above the lower limit position P4, and when the release agent L1 is present at the lower detection position P3, the mold release Different detection signals are output when the agent L1 is not present at the lower detection position P3.

Thus, with respect to the longitudinal direction of the syringe 34, the upper detection position P2 and the lower detection position P3 are arranged between the upper limit position P1 and the lower limit position P4. This is a countermeasure against the formation of a concave meniscus by the interaction of the release agent L1 with the syringe 34 at the position of the liquid level L1a that is the upper end of the release agent L1 in the syringe 34. By arranging the upper detection position P2 and the lower detection position P3 between the upper limit position P1 and the lower limit position P4, the influence of the meniscus due to the interaction between the release agent L1 and the syringe 34 can be avoided. As described above, at least a part (all in the present embodiment) of the syringe 34 has translucency. For this reason, the

optical sensors

52 and 53 detect the release agent L1 in a non-contact manner through the syringe 34 formed of a light transmitting part.

In addition, although this embodiment demonstrates the structure which detects the mold release agent L1 using the

optical sensors

52 and 53, it may not be this way. For example, a sensor having a structure in which the detection signal differs depending on the presence or absence of the release agent L1, such as a magnetic sensor or a thermal sensor, may be used instead of the

optical sensors

52 and 53.

As an abnormality that occurs in the spray device 3, an abnormality in which the spray amount of the release agent L1 from the spray port 16a of the nozzle 16 deviates from a design value can be exemplified. As this abnormality, (1) spraying caused by the failure of the compressed air supply source 26, the on-off valve 33, the

regulators

35, 27, the check valve 31, or the breakage of the release agent L1 or the compressed air piping Release due to pressure change, (2) change in spraying time due to malfunction of on-off valve 33, (3) change in release agent temperature (viscosity) due to temperature change, and (4) clogging of spray port 16a of nozzle 16. The change of the spray area of agent L1 can be illustrated.

Then, an abnormality that occurs in the spray device 3 is detected by the monitoring device 50. More specifically, when a release agent discharge abnormality by the syringe 34 of the release agent pump 30 occurs, the liquid of the release agent L1 is started after the release operation of the release agent L1 by the release agent pump 30 is started. It is conceivable that the surface L1a does not reach the lower detection position P3 within a predetermined time. Further, when a release agent suction abnormality by the syringe 34 of the release agent pump 30 occurs, after the release operation of the release agent L1 by the release agent pump 30 starts, the liquid level L1a of the release agent L1 is predetermined. It is conceivable that the upper detection position P2 is not reached in time. Further, it is conceivable that after the suction operation, the liquid level L1a of the release agent L1 falls below the upper detection position P2 before opening the on-off valve 33 (before starting the discharge). Therefore, in this embodiment, the control unit 19 detects such an abnormality through the presence or absence of detection of the release agent L1 by the

optical sensors

52 and 53.

As described above, according to the present embodiment, the detection unit 51 detects the release agent L1, so that the spray abnormality related to the release agent L1 with high viscosity can be detected more accurately.

Further, according to the present embodiment, the detection unit 51 detects the volume change of the release agent L1 in the syringe 34. According to this configuration, the detection unit 51 detects the spraying abnormality of the release agent L1 more accurately by detecting the volume change of the release agent L1 as an element having a large change in the syringe 34 when the release agent is sprayed. it can. More specifically, the detection unit 51 can detect a spray abnormality of the release agent L1 by detecting a volume change of the release agent L1 in the release agent storage unit 38.

Further, according to the present embodiment, the detection unit 51 detects the presence or absence of a spray abnormality of the release agent L1 by detecting a change in the position of the liquid level L1a of the release agent L1 in the release agent storage unit 38. According to this configuration, the detection unit 51 can detect a spray abnormality of the release agent L1 with a simple configuration that detects a change in the position of the liquid level L1a of the release agent L1.

Moreover, according to this embodiment, the

optical sensors

52 and 53 of the detection unit 51 can detect the release agent L1 in a non-contact manner. As a result, the release agent L1 having a high viscosity does not stick to the

optical sensors

52 and 53.

Further, according to the present embodiment, the

optical sensors

52 and 53 detect the release agent L1 through the light transmitting part of the syringe 34. According to this structure, it can prevent more reliably that the

optical sensors

52 and 53 contact the mold release agent L1. Moreover, it is not necessary to embed the

optical sensors

52 and 53 in the syringe 34, and the degree of freedom of the installation position of the

optical sensors

52 and 53 in the syringe 34 can be further increased.

Further, according to the present embodiment, the inner diameter D1 of the syringe 34 is set to 3.0 mm to 6.0 mm. When the inner diameter D1 of the syringe 34 is less than 3.0 mm, the release agent L1 remaining on the inner peripheral surface (wall surface) of the syringe 34 after discharging the release agent L1 is attracted by surface tension to form a bridge (air It will be in a state of being involved). If suction is performed in this state, the bridge portion is mistakenly recognized as the liquid level L1a before the original liquid level L1a comes to the upper limit detection position P2, and the syringe 34 cannot suck a predetermined amount, and is fixed at the next discharge. Discharging becomes impossible. Further, when the inner diameter of the syringe 34 is less than 3.0 mm, the highly viscous release agent L1 adheres to the inner peripheral surface 34a of the syringe 34, and is difficult to move smoothly in the syringe 34, and more bridge formation is performed. It becomes easy to do. On the other hand, by setting the inner diameter of the syringe 34 to 3.0 mm or more, the fluidity of the release agent L1 in the syringe 34 can be increased, and the release agent L1 in the syringe 34 can be smoothly moved along with the drive of the release agent pump 30. Movement can be realized, and formation of a bridge after discharge can be suppressed. As a result, the detection unit 51 can more accurately detect the release agent L1. When the inner diameter D1 of the syringe 34 exceeds 6.0 mm, the change in the flow rate of the release agent L1 with respect to the change in the liquid level of the release agent L1 in the syringe 34 increases. Therefore, the position of the liquid level L1a of the release agent L1 when the release agent L1 is sucked into the syringe 34 and the liquid level L1a of the release agent L1 when the release agent L1 is discharged from the syringe 34 The change of the position becomes smaller. For this reason, it becomes difficult for the detection unit 51 to accurately detect the state change of the release agent L1. That is, by setting the inner diameter D1 of the syringe 34 to 6.0 mm or less, the liquid level change of the release agent L1 in the syringe 34 accompanying the driving of the release agent pump 30 can be further increased. Thereby, the detection part 51 can detect the mold release agent L1 more correctly.

In particular, the syringe 34 is made of PTFE, the inner diameter D1 of the syringe 34 is 3.0 mm to 6.0 mm, and the measurement temperature is 25 degrees below with a B-type viscometer according to the ASTM-D2196 standard of the release agent L1. A combination in which the viscosity when the # 4LV とき spindle is rotated for 30 seconds is 1000 cps or less is preferable in terms of smooth flow of the release agent L1 and accurate detection of the release agent by the detection unit 51. Furthermore, when the spray amount of the release agent L1 per one time is a very small amount of about 0.3 g, a suitable release agent supply monitoring device 50 can be realized.

Further, according to the present embodiment, the critical surface tension on the inner peripheral surface 34a of the release agent accommodating portion 38 of the syringe 34 is 30 mN / m or less. According to this configuration, the wettability of the release agent L1 with respect to the inner peripheral surface 34a of the syringe 34 can be further reduced. Thereby, the release agent L1 in the syringe 34 is more smoothly transferred as the release agent pump 30 is driven. Therefore, the state change detection of the release agent L1 by the detection unit 51 can be performed more accurately.

Further, according to the present embodiment, in the path of the release agent L1 from the release agent tank 28 to the nozzle 16, the release agent L1 is once stored in the syringe 34 branched by the relay pipe 32 from this path. The detection unit 51 detects a flow rate change in the syringe 34. According to this structure, the quantity of the mold release agent L1 in the syringe 34 with respect to the flow volume of the mold release agent L1 in the said path | route can be decreased. As a result, the detection unit 51 can more accurately measure the spray amount of the release agent L1. For example, when the flow rate of the release agent L1 in the path of the release agent L1 from the release agent tank 28 to the nozzle 16 is directly measured without providing a branch path, the release agent with respect to the measured flow rate of the release agent L1. The capacity of the release agent L1 in the tank 28 is large, and as a result, it is difficult to accurately measure the release agent flow rate.

Depending on the above, the release agent supply monitoring device 50 can more accurately detect the spray abnormality of the release agent L1. Thereby, the spray abnormality of the mold release agent L1 from the spray nozzle 16 to the finishing mold | type part 7 can be discovered more reliably and early. As a result, it is possible to reduce the number of discards when product defects occur in the glass bottles 103 manufactured in each section 2. Therefore, the yield of the glass bottle 103 can be further increased.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made as long as they are described in the claims. In the following, differences from the above-described embodiment will be mainly described, and the same components as those in the above-described embodiment may be denoted by the same reference numerals and detailed description thereof may be omitted.

(1) In the above-described embodiment, the mode in which the release agent L1 and the compressed air are in direct contact with each other in the syringe 34 has been described as an example. However, this need not be the case. For example, as shown in FIG. 6, a block 55 that separates the release agent L 1 from the compressed air may be provided in the syringe 34. The block 55 is a columnar member having a cylindrical outer peripheral surface similar to the shape of the inner peripheral surface 34 a of the syringe 34. When the block 55 is made of metal (magnetic material), a magnetic sensor is installed at a place where the

optical sensors

52 and 53 are arranged instead of the

optical sensors

52 and 53, and a detection signal of the magnetic sensor is sent to the control unit 19. It may be output.

(2) In the above-described embodiment and modification, the detection unit 51 has been described as an example in which the release agent L1 is detected using a non-contact sensor. However, this need not be the case. For example, referring to FIG. 7 which is a schematic side view of a release agent spraying apparatus 3 according to still another modification, a release agent pump 30A is used instead of the release agent pump 30, and the monitoring device Instead of 50, a monitoring device 50A may be used. FIG. 8A is a view showing the main part of the modification shown in FIG. 7, and shows a state where the piston 56 is located at the upper limit position P1A. FIG. 8B is a diagram showing the main part of the modification shown in FIG. 7, and shows a state where the piston 56 is located at the lower limit position P4A.

With reference to FIG. 7, FIG. 8 (A) and FIG. 8 (B), the release agent pump 30A includes a check valve 31, a relay pipe 32A, an on-off valve 33, a syringe 34A, a piston 56, And a regulator 35.

The relay pipe 32A is a pipe that connects the check valve 31, the syringe 34A, and the on-off valve 33, and is integrally formed with the syringe 34A in this modification. A check valve 31, a syringe 34A, and an on-off valve 33 are connected to the three ports of the relay pipe 32A, respectively.

The syringe 34A selectively performs an operation of sucking the release agent L1 by compressed air and an operation of discharging the release agent L1. The syringe 34A is a member formed in a hollow shaft shape, and the release agent L1 and compressed air are introduced into the syringe 34A. The syringe 34A is supplied with both high-pressure compressed air and a high-pressure release agent L1. The state of the release agent L1 of the syringe 34A is monitored by the release agent supply monitoring device 50A. In this embodiment, since the release agent L1 is sucked and discharged using the piston 56, the wettability of the inner peripheral surface 34aA of the syringe 34A is not a big problem. In the present embodiment, the syringe 34A has an L-shaped space formed therein.

The syringe 34A has a release agent port 37A, a release agent storage portion 38A, a compressed air storage portion 39A, and a compressed air port 40A.

The release agent port 37A is a port through which the release agent L1 passes, and is connected to the relay pipe 32A. In this embodiment, the release agent port 37A is disposed at the lower end of the syringe 34A. The release agent port 37A is continuous with the release agent accommodating portion 38A. The release agent accommodating portion 38A is a portion where the release agent L1 is stored. The upper limit position P1A of the release agent container 38A is set closer to the compressed air port 40A. The upper limit position P1A is the highest position of the liquid level when the release agent L1 is sucked into the syringe 34A. The lower limit position P4A of the release agent container 38A is set closer to the release agent port 37A. The lower limit position P4A is a liquid level position at the time when the discharge of the release agent L1 from the syringe 34A to the nozzle 16 is completed, and is the lowest position of the release agent L1 in the syringe 34A. As described above, the discharge amount of the release agent L1 in one release agent spraying operation of the release agent pump 30A is as small as about 0.3 g. For this reason, the distance between the upper limit position P1A and the lower limit position P4A is as small as about several tens of millimeters.

Compressed air port 40A is a port through which compressed air passes, and is connected to compressed air supply source 26 via regulator 35. In this embodiment, the compressed air port 40A is disposed on the side surface of the syringe 34A. The compressed air port 40A is continuous with the compressed air accommodating portion 39A. The compressed air accommodating portion 39A is a portion where compressed air is stored.

The piston 56 is a cylindrical member disposed in the syringe 34A. The piston 56 moves in the advance / retreat direction A2 along the axial direction of the syringe 34A by the compressed air as the working fluid, and sucks and discharges the release agent L1 by this advance / retreat movement. The piston 56 moves from the lower limit position P4A to the upper limit position P1A in response to the pressure from the release agent L1 while the compressed air is released from the regulator 35. Moreover, the piston 56 discharges the release agent L1 in the syringe 34A by being supplied with compressed air from the regulator 35. In this manner, the piston 56 moves in the advance / retreat direction A2 along the axial direction of the syringe 34A by the compressed air, and the release agent L1 is sucked and discharged by the advance / retreat movement.

An annular seal member 57 such as an O-ring is attached to the outer peripheral portion of the piston 56, and seals between the outer peripheral portion of the piston 56 and the inner peripheral surface 34aA of the syringe 34A in a liquid-tight and air-tight manner. .

The piston 56 has a displaceable region restricted between the upper limit position P1A and the lower limit position P4A in the syringe 34A. Specifically, an upper limit stopper 58 and a lower limit stopper 59 are provided in the syringe 34A. The

stoppers

58 and 59 restrict the displacement of the piston 56 in the advance / retreat direction A2 to a predetermined range.

The upper limit stopper 58 is installed at a position corresponding to the position of the piston 56 when the liquid level of the release agent L1 reaches the upper limit position P1A. The upper limit stopper 58 is a small piece protruding from the inner peripheral surface 34aA of the syringe 34A, and is formed in an annular shape, for example. The upper limit stopper 58 restricts the piston 56 from being displaced upward by contacting the upper end surface 56 a of the piston 56.

The lower limit stopper 59 is installed at a position corresponding to the position of the piston 56 when the liquid level of the release agent L1 reaches the lower limit position P4A. The lower limit stopper 59 is a stepped portion protruding from the inner peripheral surface 34aA of the syringe 34A, and is formed in an annular shape, for example. The lower limit stopper 59 restricts the piston 56 from being displaced downward by contacting the lower end surface 56 b of the piston 56.

The drive control of the release agent pump 30A by the control unit 19 is the same as the drive control of the release agent pump 30 by the control unit 19.

The release agent supply monitoring device 50 A includes a detection unit 51 A and a control unit 19.

The detection unit 51A is configured to detect the release agent L1 in order to confirm the presence or absence of the spray abnormality of the release agent L1 in the spray device 3. The detector 51 A is installed in a release agent pump 30 A that supplies a release agent to the nozzle 16.

In this embodiment, the detection unit 51A detects the volume change of the release agent L1 in the syringe 34A. More specifically, the detection unit 51A detects the position of the piston 56 in the advance / retreat direction A2.

The detection unit 51 A has a displacement sensor 60. The displacement sensor 60 is installed in the syringe 34A. The displacement sensor 60 is a contact-type displacement meter. The displacement sensor 60 includes a housing 61 and a movable probe 62 supported by the housing 61.

The housing 61 is formed in an elongated shaft shape, and is fixed to the upper end portion of the syringe 34A. A part of the needle-shaped probe 62 is accommodated in the housing 61. In the probe 62, for example, a moving range in the forward / backward direction A2 is restricted to a predetermined range by a stopper (not shown) provided in the housing 61. A part of the probe 62 protrudes from the housing 61 along the advance / retreat direction A2. A through hole 34b is formed at the upper end of the syringe 34A, and the housing 61 and the probe 62 extend into the syringe 34 through the through hole 34b. That is, at least a part of the probe 62 is disposed in the syringe 34. The probe 62 is urged toward the piston 56 by a spring (not shown), and the tip of the probe 62 is configured to contact the upper end surface 56 a of the piston 56.

In conjunction with the displacement of the piston 56 in the advance / retreat direction A2, the probe 62 is also integrally displaced in the advance / retreat direction A2. A detection signal corresponding to the position of the probe 62 with respect to the housing 61 is output from the displacement sensor 60 to the control unit 19. The resolution of the displacement sensor 60 is as high as about 1 μm, and as a result, minute nozzle clogging can be detected. When the piston 56 is displaced from the upper limit position P1A by a predetermined value Δx1 or more in the discharge direction A21 (downward) when the piston 56 discharges the release agent L1 in the advance / retreat direction A2, the probe 62 is moved to the housing 61. It is received by the provided stopper. Thereby, the displacement of the probe 62 in the ejection direction A21 is restricted. That is, the probe 62 is released from the connection with the piston 56 and maintained at a fixed position when the advancement displacement amount of the piston 56 at the time of discharging the release agent L1 is equal to or greater than the predetermined value Δx1.

With the above-described configuration, the release agent pump 30A and the detection unit 51A are different from the release agent pump 30 and the detection unit 51 in that the detection force (detection value) of the release agent L1 is not affected by the viscosity of the release agent L1. Accuracy). Further, since the diameter of the piston 56 can be made larger than the inner diameter D1 of the syringe 34 of the release agent pump 30, even if the liquid level change amount in the release agent pump 30A and the liquid level change amount in the release agent pump 30 are the same, The discharge amount of the release agent L1 in the release agent pump 30A can be increased. Thereby, the discharge amount of the release agent L1 that can be detected by the detection unit 51A can be made wider.

In the present embodiment, the upper limit position P1A and the upper detection position P2A are set to be the same in the forward / backward direction A2. This is because, unlike the liquid surface of the release agent L1, the lower end surface 56b of the piston 56 is always kept flat, so that a meniscus is formed by the interaction between the release agent L1 and the syringe 34A. This is because there is no need to consider. On the other hand, the lower detection position P3A is arranged at a position advanced from the lower limit position P4A by the upper limit position P1A side Δx2. This is because if the displacement amount of the probe 62 is large, the amount of change in the output from the displacement sensor 60 with respect to the displacement amount of the probe 62 becomes large and the position detection accuracy decreases. This is because the amount of displacement is limited. When the piston 56 is at the lower limit position P4A, a predetermined gap Δx2 is provided between the probe 62 and the piston 56.

In the present embodiment, a configuration in which the displacement of the piston 56 is detected using the displacement sensor 60 will be described. However, this need not be the case. For example, a sensor having a structure in which a detection signal differs depending on the displacement of the piston 56 such as a magnetic sensor or an optical sensor may be used instead of the displacement sensor 60.

An abnormality that occurs in the spray device 3 is detected by the monitoring device 50A. More specifically, when a release agent discharge abnormality by the syringe 34A of the release agent pump 30A occurs, the lower end surface of the piston 56 is started after the release operation of the release agent L1 by the release agent pump 30A is started. It is conceivable that 56b does not reach the lower detection position P3A within a predetermined time. In addition, when a release agent suction abnormality by the syringe 34A of the release agent pump 30A occurs, after the release operation of the release agent L1 by the release agent pump 30A starts, the lower end surface 56b of the piston 56 remains within a predetermined time. It is conceivable that the upper detection position P2A is not reached. Therefore, in this modification, the control unit 19 detects such an abnormality.

As described above, according to this modification, since the piston 56 is provided, the syringe 34A includes the release agent L1 in the vicinity of the inner peripheral surface 34aA (wall surface) of the syringe 34A as the piston 56 moves. The entire mold release agent can be transferred smoothly.

Further, according to this modification, the detection unit 51A can detect more accurately whether or not the release agent L1 is discharged from the syringe 34A as set by detecting the movement of the piston 56.

Further, according to this modification, the detection unit 51A can detect the movement of the piston 56 through the displacement of the probe 62, that is, the spray state of the release agent L1.

According to this modification, the probe 62 is released from the connection with the piston 56 and maintained at the fixed position P3A when the advancement displacement amount of the piston 56 at the time of discharging the release agent L1 is equal to or greater than the predetermined value Δx1. . According to this configuration, the allowable value of the movement amount of the probe 62 may be less than the maximum movement amount of the piston 56. For this reason, the sensitivity of the probe 62 (the gain of the output of the probe 62 with respect to the movement of the piston 56) can be increased. Thereby, 51 A of detection parts can detect the state change of the mold release agent L1 in the syringe 34 more correctly.

Further, according to this modification, at least a part of the probe 62 is accommodated in the syringe 34A. According to this configuration, the probe 62 is protected by the syringe 34A. Therefore, it can suppress more reliably that the detection value in 51 A of detection parts becomes an abnormal value because the probe 62 contacts a foreign material.

Further, according to this modification,

stoppers

58 and 59 for restricting the displacement of the piston 56 in the advance / retreat direction A2 to a predetermined range are provided. According to this configuration, the movement amount of the piston 56 does not need to be too large. For this reason, the allowable value of the movement amount of the probe 62 may be small. For this reason, the sensitivity of the probe 62 can be increased. Thereby, detection part 51A can detect the state change of mold release agent L1 in syringe 34A more correctly. Further, in the case where the piston 56 sucks more than the setting due to abnormal pressure in the syringe 34A or the like, it is possible to prevent the detection unit 51A from being damaged.

Further, according to the present modification, the probe 62 is arranged at a location where the release agent L1 does not exist, so that the detection operation by the displacement sensor 60 can be performed in a state that is not easily affected by the viscosity of the release agent L1. it can.

(3) Further, in the above-described embodiments and modifications, a heater for heat insulation may be provided in a passage or the like through which the release agent L1 passes in the spray device 3. The heater may be an electric heater or may include a heat insulating material. By providing the heater, for example, the temperature of the release agent L1 in winter can be maintained above a certain level. Thereby, it can suppress that the viscosity of the mold release agent L1 becomes high too much. Therefore, it can suppress more reliably that the mold release agent L1 clogs with the nozzle 16 grade | etc., Ie, the spray abnormality of the mold release agent L1 arises.

The present invention can be widely applied as a release agent supply monitoring device and a release agent spraying device to a glass bottle mold.

3 Release agent spraying device 5 Coarse mold part (mold)
6 Mouth mold (mold)
7 Finishing mold (mold)
16

Spray nozzle

30, 30A Release agent pump (pump)
34, 34A Syringe 34a Inner

peripheral surface

38, 38A

Release agent container

40, 40A Compressed air port (port through which working fluid passes)
50, 50A Release agent

supply monitoring device

51,

51A Detector

52, 53 Optical sensor 56

Piston

58, 59 Stopper 62 Probe 103 Glass bottle (glass molded product)
A2 Advancing and retracting direction D1 Syringe inner diameter L1 Release agent

Claims

A detection unit for detecting the release agent in order to confirm the presence or absence of spray abnormality of the release agent in a release agent spraying apparatus for spraying the release agent to the glass bottle molding die;
A release agent supply monitoring device, comprising:
The release agent supply monitoring device according to claim 1,
The detection unit is installed in a pump that supplies the release agent to a spray nozzle of the release agent spraying device,
The pump includes a syringe that performs an operation of sucking the release agent with a working fluid and an operation of discharging the release agent,
The said detection part detects the volume change of the said mold release agent in the said syringe, The mold release agent supply monitoring apparatus characterized by the above-mentioned.
The release agent supply monitoring device according to claim 2,
The release agent supply monitoring device, wherein the syringe has a port through which the working fluid passes and a release agent storage portion in which the release agent is stored.
The release agent supply monitoring device according to claim 3,
The detection unit detects the presence or absence of spray abnormality of the release agent by detecting a change in the liquid level position of the release agent in the release agent storage unit. Monitoring device.
A release agent supply monitoring device according to any one of claims 2 to 4,
The release agent supply monitoring device, wherein the detection unit includes an optical sensor for detecting light.
The release agent supply monitoring device according to claim 5,
The syringe includes a translucent part,
The release agent supply monitoring device, wherein the optical sensor detects the release agent through the translucent part.
A release agent supply monitoring device according to any one of claims 2 to 6,
A mold release agent supply monitoring device, wherein an inner diameter of the syringe is 3.0 mm to 6.0 mm.
A release agent supply monitoring device according to any one of claims 2 to 7,
The syringe has a port through which the working fluid passes, and a release agent storage part in which the release agent is stored,
The release agent supply monitoring apparatus, wherein a critical surface tension of the inner peripheral surface of the release agent container of the syringe is 30 mN / m or less.
A release agent supply monitoring device according to any one of claims 2 to 4,
The pump has a piston disposed in the syringe;
The said piston moves to the advancing / retreating direction along the axial direction of the said syringe with the said working fluid, The said releasing agent is attracted | sucked and discharged by this advancing / retreating apparatus, The release agent supply monitoring apparatus characterized by the above-mentioned.
The release agent supply monitoring device according to claim 9,
The release agent supply monitoring device, wherein the detection unit detects a position of the piston in the forward / backward direction.
A release agent supply monitoring device according to claim 10,
The release agent supply monitoring apparatus, wherein the detection unit includes a probe that is displaced in the advance / retreat direction in conjunction with the advance / retreat movement of the piston.
The release agent supply monitoring device according to claim 11,
The probe is released from the piston and maintained at a fixed position when the displacement of the piston during discharge of the release agent is greater than or equal to a predetermined value. Monitoring device.
The release agent supply monitoring device according to claim 11 or 12,
A release agent supply monitoring device, wherein at least a part of the probe is accommodated in the syringe.
A release agent supply monitoring device according to any one of claims 9 to 13,
A release agent supply monitoring device, further comprising a stopper for restricting the displacement of the piston in the advance / retreat direction to a predetermined range.
A release agent supply monitoring device according to any one of claims 1 to 14,
A pump for supplying the release agent;
A spray nozzle for spraying the release agent discharged from the pump;
An apparatus for spraying a release agent onto a mold for forming a glass bottle, comprising: