JP6550979B2 - Mixing device - Google Patents

Description

  The present invention relates to mixing devices.

  Conventionally, a mixing apparatus for forming a resin by mixing two different liquids has been used in resin molding, particularly, RTM (Resin Transfer Molding) molding.

  As the mixing device, a cylinder including therein a mixing chamber in which two different liquids discharged from the discharge port provided on the inner wall are mixed, and a cylinder pin that opens and closes the discharge port by moving back and forth along the inner wall of the cylinder The mixing apparatus which has, is known (refer patent document 1).

JP 2004-181771

  In the case of the mixing device described above, the resin or the like formed in the mixing chamber may enter the gap between the inner wall of the cylinder and the cylinder pin as a foreign substance. Foreign matter in the gap increases the friction between the inner wall of the cylinder and the cylinder pin. As a result, the smooth movement of the cylinder pin is hindered and the opening and closing of the discharge port is not performed at the intended timing, resulting in an error in the amount of resin formed in the mixing chamber. Therefore, when the mixing apparatus is used for resin molding, the resin density after molding does not become uniform due to variations in the amount of resin injected into the mold, and the strength of the molded product varies. A problem arises.

  Therefore, the present invention has been made to solve the above problems, and intended to open and close the discharge port even when foreign matter enters between the cylinder pin for opening and closing the discharge port and the inner wall of the cylinder. An object of the present invention is to provide a mixing device that can be performed at timing.

A mixing apparatus according to the present invention that achieves the above object includes a mixing chamber in which a resin used for resin molding is formed by mixing at least two different liquids discharged from a discharge port provided on an inner wall. A cylinder, and a cylinder pin that opens and closes the discharge port by moving back and forth along the inner wall of the cylinder. The mixing device is provided on the inner wall of the cylinder, and is provided with a recovery port for recovering at least two different liquids discharged from the discharge port and a cylinder pin, and the discharge port and the recovery port can be in fluid communication with each other. And a circulation path. In the mixing device, a concave portion for accommodating a foreign substance that has entered between the inner wall of the cylinder and the cylinder pin circulates in at least one of a portion of the cylinder inner wall that contacts the cylinder pin or a portion of the cylinder pin that contacts the inner wall of the cylinder. It is formed separately from the road .

  According to the mixing device according to the present invention, the foreign matter that has entered between the inner wall of the cylinder and the cylinder pin is accommodated in the recess, so that the foreign matter is prevented from staying between the inner wall of the cylinder and the cylinder pin. Therefore, the foreign matter is prevented from increasing the friction between the inner wall of the cylinder and the cylinder pin. Therefore, even when foreign matter gets in between the cylinder pin for opening and closing the discharge port and the inner wall of the cylinder, it becomes possible to perform the opening and closing of the discharge port at the intended timing.

1 is a schematic view of a molding apparatus according to Embodiment 1. FIG. It is the schematic which shows the mixing apparatus which concerns on Embodiment 1 in the state in which the cylinder pin is advancing and retracting. It is the schematic which shows the cylinder pin of the mixing apparatus. It is the schematic which shows the same mixing apparatus in the state in which the cylinder pin has reached the top dead center. FIG. 5 is an enlarged view of a portion surrounded by a broken line portion M1 of FIG. 4; FIG. 6 is an enlarged view corresponding to FIG. 5 in a state where the cylinder pin has reached bottom dead center. FIG. 7 is an enlarged view of a portion surrounded by a broken line portion M2 of FIG. 6; It is a flowchart which shows the shaping | molding method of the composite material using the shaping | molding apparatus which concerns on Embodiment 1. FIG. It is a flowchart which shows the injection | pouring method of resin using the mixing apparatus which concerns on Embodiment 1. FIG. Fig. 10 (A) is a schematic view showing a mixing apparatus according to a second embodiment, and Fig. 10 (B) is an enlarged view of a portion surrounded by a broken line portion M3 of Fig. 10 (A).

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The size and ratio of each member in the drawings may be exaggerated for the convenience of the description and may be different from the actual size and ratio.

(Embodiment 1)
<Molding device>
First, the structure of the shaping | molding apparatus 300 which concerns on this embodiment is demonstrated with reference to FIG.

  FIG. 1 is a schematic view of a molding apparatus 300 according to the present embodiment.

  As shown in FIG. 1, the molding apparatus 300 includes a mixing apparatus 100 that forms a cavity that can be sealed inside by being closed, and that forms a resin that mixes two different liquids and injects the liquid into the cavity. And a press part 320 that applies a clamping pressure P to the mold 310. The molding apparatus 300 further includes a feeder 330 that supplies two different liquids to the mixing apparatus 100, a suction unit 340 that vacuum-sucks the inside of the cavity, and a sensor 350 that detects opening and closing of the molding die 310. The molding apparatus 300 further includes a control unit 360 that controls the operation of the entire molding apparatus 300. Each component will be described in detail below.

  The mold 310 includes a pair of upper and lower molds 311 (male), a lower mold 312 (female), an upper bolster 313 that fixes and holds the upper mold 311, and a lower mold 312 that is fixed. A lower bolster 314 for holding. In the present embodiment, the mixing apparatus 100 is disposed inside the lower mold 312.

  Carbon fibers (not shown) corresponding to the reinforcing base material are placed in the cavities. The resin formed by mixing two different liquids impregnates the inside from the lower surface of the carbon fiber.

  The pressing unit 320 applies a clamping pressure P to the upper mold 311 of the mold 310. The mold clamping pressure P is applied to the upper mold 311 via the upper mold bolster 313. The pressing unit 320 has a cylinder 321 using fluid pressure such as oil pressure, and adjusts the clamping pressure P by controlling the oil pressure and the like.

  The feeder 330 is connected to the mixing device 100 via the first hose 370. The feeder 330 supplies two different liquids to the mixing apparatus 100 via the first hose 370. The first hose 370 is fixed to the lower bolster 314 by a fastener 371.

  The suction unit 340 includes a vacuum pump (not shown). The suction unit 340 sucks (vacuates) air in the cavity after closing the mold 310, and evacuates the cavity. The suction part 340 and the lower mold 312 are connected via a second hose 380. The second hose 380 is fixed to the lower bolster 314 by a fastener 381. In addition, the suction unit 340 and the upper mold 311 are connected via a third hose 390. The third hose 390 is fixed to the upper bolster 313 by a fastener 391.

  The mixing apparatus 100, the press unit 320, the feeder 330, the suction unit 340, the sensor 350, and the control unit 360 are connected by wiring.

<Mixing device>
Next, the configuration of the mixing apparatus 100 according to the present embodiment will be described with reference to FIGS.

  FIG. 2 is a schematic view showing the mixing device 100 according to the present embodiment in a state where the cylinder pin 20 is advancing and retreating. FIG. 3 is a schematic view showing a cylinder pin 20 of the mixing device 100. As shown in FIG. FIG. 4 is a schematic view showing the mixing device 100 according to the present embodiment in a state where the cylinder pin 20 has reached the top dead center Uc. FIG. 5 is an enlarged view of a portion surrounded by a broken line portion M1 of FIG. FIG. 6 is an enlarged view corresponding to FIG. 5 in a state where cylinder pin 20 has reached bottom dead center Lc. FIG. 7 is an enlarged view of a portion surrounded by a broken line portion M2 of FIG. In FIGS. 2 to 7, the mixing device 100 is shown upside down from the mixing device 100 shown in FIG. 1.

  As shown in FIGS. 2 and 3, the mixing apparatus 100 according to this embodiment includes a cylinder 10 and a cylinder pin 20 that advances and retreats along the inner wall 11 of the cylinder 10. The cylinder 10 is a resin used for resin molding by mixing the first liquid 210 and the second liquid 220 discharged from the first discharge port 12 and the second discharge port 13 provided on the inner wall 11 of the cylinder 10. The mixing chamber 30 in which 200 is formed is provided inside. The first discharge port 12 and the second discharge port 13 are opened and closed by the cylinder pin 20 advancing and retracting along the inner wall 11 of the cylinder 10. At a portion of the cylinder pin 20 in contact with the inner wall 11 of the cylinder 10, a recess 22 is formed which accommodates foreign matter that has entered between the inner wall 11 of the cylinder 10 and the cylinder pin 20. Each component will be described in detail below.

  The cylinder 10 has an inner wall 11 on which a cylinder pin 20 slides. The inner wall 11 is provided with a first discharge port 12 through which the first liquid 210 is discharged and a second discharge port 13 through which the second liquid 220 is discharged. In the present embodiment, the mixing chamber 30 is formed in an area defined by the inner wall 11 and the cylinder pin 20.

  In the present embodiment, an epoxy resin for composite material is used as the resin injected into the mold 310. As the first liquid 210 (main agent), for example, a bisphenol A type epoxy resin, a phenol novolac type epoxy resin, a glycidylamine type epoxy resin, or the like can be used. Further, as the second liquid 220 (hardening agent), for example, a combination of dicyandiamide and dichlorophenyldimethylurea can be used. However, it is not particularly limited, and diaminodiphenyl sulfone, aromatic diamine, acid anhydride polyamide, and the like can be used as the second liquid 220.

  The cylinder 10 includes a first discharge device 160 that discharges the first liquid 210 into the mixing chamber 30 via the first discharge port 12, and a first supply pipe 161 that supplies the first liquid 210 to the first discharge device 160. ,including. In addition, the cylinder 10 discharges the second liquid 220 into the mixing chamber 30 via the second discharge port 13, and a second supply pipe that supplies the second liquid 220 to the second discharge device 170. And 171.

  Attached to the cylinder 10 is a first auxiliary block 50 provided with an auxiliary supply pipe 162 for supplying the first liquid 210 to the first supply pipe 161. The auxiliary supply pipe 162 is connected to the first supply machine 164 via the pipe 163. The first liquid 210 supplied from the first supply machine 164 reaches the first discharge device 160 via the pipe 163, the auxiliary supply pipe 162, and the first supply pipe 161.

  In addition, a second auxiliary block 60 including an auxiliary supply pipe 172 for supplying the second liquid 220 to the second supply pipe 171 is attached to the cylinder 10. The auxiliary supply pipe 172 is connected to the second supply machine 174 via the pipe 173. The second liquid 220 supplied from the second supply machine 174 reaches the second discharge device 170 via the pipe 173, the auxiliary supply pipe 172, and the second supply pipe 171.

  The cylinder pin 20 includes a sliding portion 21 (corresponding to a portion that contacts the inner wall of the cylinder in the cylinder pin) that slides along the inner wall 11 of the cylinder 10. The sliding portion 21 is formed with a concave portion 22 that accommodates foreign matter that has entered between the inner wall 11 of the cylinder 10 and the cylinder pin 20. Specifically, the recess 22 is formed in a spiral shape along the axis X of the cylinder pin 20.

  Since the concave portion 22 is formed in the sliding portion 21, the contact area between the inner wall 11 of the cylinder 10 and the cylinder pin 20 is reduced, so that friction is reduced. Further, foreign matter that has entered between the inner wall 11 of the cylinder 10 and the cylinder pin 20 is accommodated in the recess 22. Thereby, even if a foreign substance enters between the inner wall 11 of the cylinder 10 and the cylinder pin 20, it is possible to prevent the friction between the inner wall 11 of the cylinder 10 and the cylinder pin 20 from increasing. Therefore, even if foreign matter enters between the cylinder pin 20 that opens and closes the first discharge port 12 and the second discharge port 13 and the inner wall 11 of the cylinder 10, the first discharge port 12 and the second discharge port 13. Can be performed at the timing intended to open and close.

  The mixing device 100 takes two states depending on the positional relationship between the cylinder 10 and the cylinder pin 20. Specifically, in the mixing apparatus 100, the first state C1 (see FIG. 6) in which the first discharge port 12 and the second discharge port 13 are closed, and the first discharge port 12 and the second discharge port 13 are opened. There are two states of the second state C2 (see FIG. 5).

  The mixing apparatus 100 further includes a drive mechanism 110 that switches between the first state C1 and the second state C2 by moving the cylinder pin 20 back and forth along the inner wall 11 of the cylinder 10. Note that, as described above, the concave portion 22 that accommodates foreign matter is formed in the sliding portion 21 of the cylinder pin 20, so that the friction between the inner wall 11 of the cylinder 10 and the cylinder pin 20 is unlikely to increase. Therefore, even when an inexpensive drive having a low output is adopted as the drive mechanism 110, it is possible to perform the opening and closing of the first discharge port 12 and the second discharge port 13 at the intended timing.

  In the present embodiment, the drive mechanism 110 includes a pressure chamber 90 to which a working fluid that moves the cylinder pin 20 forward and backward by applying fluid pressure to the cylinder pin 20 is supplied. And the recessed part 22 formed in the cylinder pin 20 is arrange | positioned in the site | part 23 which continues to contact the inner wall 11 between the pressure chamber 90 and the mixing chamber 30 while the cylinder pin 20 advances and retreats (refer FIG. 3). . The cylinder pin 20 includes a piston 24 that receives pressure from the working fluid in the pressure chamber 90. In this embodiment, oil is used as the working fluid.

  The pressure chamber 90 is divided into a first pressure chamber 91 and a second pressure chamber 92 by the piston 24 during switching from the first state C1 to the second state C2 and during switching from the second state C2 to the first state C1. Be done. The pressure chamber 90 includes an upper wall Uc that restricts movement of the piston 24 in the direction Y1 away from the first discharge port 12 and the second discharge port 13 (hereinafter sometimes referred to as top dead center), A lower wall Lc that restricts movement in the direction Y2 approaching the first discharge port 12 and the second discharge port 13 (hereinafter sometimes referred to as bottom dead center). The piston 24 moves between the upper wall Uc and the lower wall Lc. In the first state C1, the piston 24 contacts the lower wall Lc. Also, in the second state C2, the piston 24 contacts the upper wall Uc.

  The pressure chamber 90 includes a first oil port 93 used to adjust the pressure in the first pressure chamber 91, and a second oil port 94 used to adjust the pressure in the second pressure chamber 92. ,including. The first oil port 93 is connected to a first oil pump 180 via a pipe 181, and the second oil port 94 is connected to a second oil pump 185 via a pipe 186. The first oil pump 180 and the second oil pump 185 are connected to the control unit 360 via wires.

  The pressure chamber 90 includes a first sensor 95 that detects whether the cylinder pin 20 has reached the top dead center (upper wall) Uc, and whether the cylinder pin 20 has reached the bottom dead center (lower wall) Lc. And a second sensor 96 for detecting whether or not. In the present embodiment, limit switches are used as the first sensor 95 and the second sensor 96. The first sensor 95 and the second sensor 96 are connected to the control unit 360 via wiring.

  When oil is injected from the first oil pump 180 into the first pressure chamber 91 via the first oil port 93, the first pressure chamber 91 is pressurized. At this time, oil is suctioned from the second pressure chamber 92 through the second oil port 94 by the second oil pump 185. As a result, a pressure difference is generated between the first pressure chamber 91 and the second pressure chamber 92. The cylinder pin 20 moves from the upper wall Uc to the lower wall Lc by the pressure difference acting on the piston 24. As a result, the first discharge port 12 and the second discharge port 13 are closed (see FIG. 6).

  Further, as shown in FIG. 4, when oil is injected from the second oil pump 185 into the second pressure chamber 92 via the second oil port 94, the second pressure chamber 92 is pressurized. At this time, oil is suctioned from the first pressure chamber 91 via the first oil port 93 by the first oil pump 180. Thereby, a pressure difference is generated between the first pressure chamber 91 and the second pressure chamber 92. The cylinder pin 20 moves from the lower wall Lc to the upper wall Uc by the pressure difference acting on the piston 24. As a result, as shown in FIG. 5, the first discharge port 12 and the second discharge port 13 are opened, and the first liquid 210 is discharged from the first discharge port 12 to the mixing chamber 30, and the second discharge port 13 The second liquid 220 is discharged from the mixing chamber 30. The discharged first liquid 210 and second liquid 220 are mixed in the mixing chamber 30 to form the resin 200.

  As described above, the recess 22 formed in the cylinder pin 20 is disposed in the portion 23 that continues to contact the inner wall 11 between the pressure chamber 90 and the mixing chamber 30 while the cylinder pin 20 advances and retreats. As a result, it is possible to prevent foreign matter accommodated in the recess 22 from entering the pressure chamber 90.

  As shown in FIG. 6, in the first state C1, the cylinder 10 has a first recovery port 14 that recovers the first liquid 210 discharged from the first discharge port 12 and a first recovery port 14 that recovers the first liquid 210. And a first recovery pipe 165 into which the first solution 210 flows. The cylinder pin 20 includes a first circulation path 25 that fluidly connects the first discharge port 12 and the first recovery port 14 in the first state C1. Further, the first auxiliary block 50 includes a recovery pipe 166 for recovering the first liquid 210 that has flowed into the first recovery pipe 165. The recovery pipe 166 is connected to the first feeder 164 via a pipe 167 (see FIG. 2).

  In the first state C1, the first liquid 210 discharged from the first discharge port 12 flows from the first recovery port 14 into the first recovery pipe 165 via the first circulation path 25. Then, the first liquid 210 that has flowed into the first recovery pipe 165 is returned to the first feeder 164 via the recovery pipe 166 and the pipe 167 of the first auxiliary block 50.

  Further, in the first state C1, the cylinder 10 has a second recovery port 15 that recovers the second liquid 220 discharged from the second discharge port 13 and a second liquid 220 recovered from the second recovery port 15 flows in. And a second recovery pipe 175. The cylinder pin 20 includes a second circulation path 26 that fluidly connects the second discharge port 13 and the second recovery port 15 in the first state C1. Also, the second auxiliary block 60 includes a recovery pipe 176 for recovering the second liquid 220 that has flowed into the second recovery pipe 175. The recovery pipe 176 is connected to the second feeder 174 via a pipe 177 (see FIG. 2).

  In the first state C 1, the second liquid 220 discharged from the second discharge port 13 flows from the second recovery port 15 into the second recovery pipe 175 via the second circulation path 26. Then, the second liquid 220 that has flowed into the second recovery pipe 175 is returned to the second feeder 174 via the recovery pipe 176 and the pipe 177 of the second auxiliary block 60.

  As shown in FIG. 7, the mixing device 100 further includes a cleaning mechanism 120 for cleaning the recess 22 formed in the cylinder pin 20. The cleaning mechanism 120 includes a nozzle 121 that supplies the cleaning liquid 230 to the recess 22, a cleaning liquid pump 122 that supplies the cleaning liquid 230 to the nozzle 121, and a pipe 123 that connects the nozzle 121 and the cleaning liquid pump 122. The cleaning solution pump 122 is connected to the control unit 360 via a wire.

  The control unit 360 controls the first discharge opening 12 and the second discharge opening 13 to change from the closed state to the open state, or the first discharge opening 12 and the second discharge opening 13 are closed from the open state. When one of the second time T2 before changing to the state exceeds the reference value Ts, the cleaning solution pump 122 is driven. In the present embodiment, the reference value Ts is set to 0.1 seconds.

  The first time T1 and the second time T2 are measured by the controller 360 using the first sensor 95 and the second sensor 96. In the present embodiment, driving of the cleaning solution pump 122 is performed in the first state C1. When the cleaning solution pump 122 is driven, the cleaning solution 230 is supplied from the nozzle 121 to the recess 22, and the foreign matter accumulated in the recess 22 is cleaned.

  In the present embodiment, the cleaning mechanism 120 further includes a pipe 124 (corresponding to a piping portion) that recovers the cleaning liquid 230 supplied to the recess 22 and returns it from the recess 22 to the cleaning solution pump 122. In the present embodiment, the cleaning mechanism 120 includes a cleaning liquid recovery port 16 that communicates with the pipe 124 and recovers the cleaning liquid 230 supplied to the recess 22 in the inner wall 11 of the cylinder 10. The pipe 124 is attached with a filter 125 for filtering out impurities contained in the cleaning liquid 230 flowing into the pipe 124.

  The cleaning solution 230 supplied to the recess 22 is recovered from the cleaning solution recovery port 16 together with the foreign matter accumulated in the recess 22, and returned to the cleaning solution pump 122 through the pipe 124. At this time, impurities contained in the cleaning liquid 230 that has flowed into the pipe 124 are removed by the filter 125.

  In the present embodiment, the cleaning liquid 230 is the same as the solvent used for the first liquid 210 discharged from the first discharge port 12 and the second liquid 220 discharged from the second discharge port 13.

<Molding method>
Hereinafter, the procedure of the molding method using the molding apparatus 300 to which the mixing apparatus 100 according to the present embodiment is attached will be described with reference to FIG.

  As shown in FIG. 8, in the molding method using the molding apparatus 300, the step of disposing carbon fibers in the mold 310 (step S1), the step of closing the mold 310 (step S2), and the mold The process of vacuum-sucking 310 (step S3), the process of injecting the resin 200 into the mold 310 (step S4), the process of curing the resin 200 in the mold 310 (step S5), and the molding Demolding the composite material from the mold 310 (step S6). Each step will be described in detail below. Note that, except for the operations of steps S1, S5, and S6, the control unit 360 executes the processing of each step.

  First, carbon fibers are laminated, placed in the cavity of the mold 310, and preformed (step S1). At this time, the inner surface of the mold facing the cavity is degreased using a predetermined organic solvent, and is subjected to a mold release process using a mold release agent.

  Next, the mold 310 is closed (step S2). In the present embodiment, when the mold clamping pressure P is applied to the mold 310 by the press portion 320, the upper mold 311 and the lower mold 312 of the mold 310 approach each other and the mold closing progresses. Whether or not the mold closing of the mold 310 is completed is determined based on the signal from the sensor 350.

  Next, the inside of the cavity of the mold 310 is suctioned by the suction unit 340 to evacuate the inside of the cavity (step S3). By performing evacuation, bubbles generated on the surface can be prevented, voids and pits of the composite material which is a molded product can be reduced, and mechanical properties and design properties of the composite material can be improved.

  Next, the resin 200 is injected into the mold 310 (step S4). The injection of the resin 200 is performed by the method described later using the mixing apparatus 100.

  After injecting the resin into the mold 310, the resin 200 in the cavity is left until it is sufficiently cured (step S5).

  When the mold 310 is opened and the molded composite material is removed, the molding is completed (step S6).

<Injection process>
With reference to FIG. 9, the process (step S4) of injecting the resin 200 into the mold 310 will be described in detail.

  The step of injecting the resin 200 into the mold 310 includes a step of raising the cylinder pin 20 (step S11) and a first step until the first discharge port 12 and the second discharge port 13 change from the closed state to the open state. A step of measuring the time T1 (step S12), a step of determining whether the resin 200 has been injected a predetermined amount (step S13), a step of lowering the cylinder pin 20 (step S14), and the first discharge port 12 And a step of measuring the second time T2 until the second discharge port 13 changes from the open state to the closed state (step S15), and a step of determining whether or not the moving time of the cylinder pin 20 is within the reference value (step). S16) and the step of cleaning the recess 22 (S17). Each step will be described in detail below. In addition, the control part 360 performs the process of each process.

  First, in the step of raising the cylinder pin 20 (step S11), oil is injected into the second pressure chamber 92 to pressurize the second pressure chamber 92. In addition, before the process of raising the cylinder pin 20, the first discharge port 12 and the second discharge port 13 are in a closed state. In other words, the mixing device 100 is in the first state C1, and the first liquid 210 discharged from the first discharge port 12 passes through the first recovery port 14 via the first circulation path 25 formed in the cylinder pin 20. It has been collected (see Figure 6). Similarly, the second liquid 220 discharged from the second discharge port 13 is recovered from the second recovery port 15 via the second circulation path 26 formed in the cylinder pin 20.

  When the second pressure chamber 92 is pressurized, the cylinder pin 20 moves from the lower wall Lc to the upper wall Uc. At this time, a first time T1 until the first discharge port 12 and the second discharge port 13 change from the closed state to the open state is measured (step S12). Specifically, the time from when the second sensor 96 is turned off to when the first sensor 95 is turned on is measured as a first time T1.

  Until the specified amount of resin 200 is injected into the mold 310 (step S13: “No”), the cylinder pin 20 is maintained in the raised state. Thus, the first liquid 210 is discharged from the first discharge port 12 and the second liquid 220 is discharged from the second discharge port 13 (see FIG. 5). The first liquid 210 discharged from the first discharge port 12 and the second liquid 220 discharged from the second discharge port 13 are mixed in the mixing chamber 30 and injected into the forming die 310 of the forming apparatus 300.

  If it is determined that the prescribed amount of resin 200 has been injected into the mold 310 (step S13: “Yes”), oil is injected into the first pressure chamber 91 to pressurize the first pressure chamber 91. Thereby, the cylinder pin 20 starts moving from the upper wall Uc to the lower wall Lc, and the cylinder pin 20 descends (step S14). At this time, the second time T2 until the first discharge port 12 and the second discharge port 13 change from the open state to the closed state is measured (step S15). Specifically, the time from when the first sensor 95 is turned off to when the second sensor 96 is turned on is measured as a second time T2.

  In the step of determining whether the moving time of the cylinder pin 20 is within the reference value (step S16), the first time T1 until the first discharge port 12 and the second discharge port 13 change from the closed state to the open state, Alternatively, it is determined whether any one of the second time T2 until the first discharge port 12 and the second discharge port 13 change from the open state to the closed state exceeds the reference value Ts.

  If it is determined that one of the first time T1 and the second time T2 has fallen below the reference value Ts (step S16: “NO”), the process proceeds to the step of cleaning the recess 22 (step S17).

  In the step of cleaning the recess 22 (step S17), the cleaning solution 230 is supplied from the cleaning solution pump 122 via the pipe 123 (see FIG. 7). Cleaning is performed in parallel with the step of curing the resin in the mold (step S5). The cleaning time is not particularly limited, but in the present embodiment, the cleaning is performed for 30 seconds.

(Action / Effect)
The mixing apparatus 100 according to the present embodiment is made of resin by mixing the first liquid 210 discharged from the first discharge port 12 provided on the inner wall 11 and the second liquid 220 discharged from the second discharge port 13. A cylinder 10 having a mixing chamber 30 in which a resin 200 used for molding is formed, and a cylinder pin 20 that opens and closes the first discharge port 12 and the second discharge port 13 by moving back and forth along the inner wall 11 of the cylinder 10. And having. In the mixing device 100, a concave portion 22 is formed in a sliding portion 21 (corresponding to a portion of the cylinder pin that contacts the inner wall of the cylinder) to store foreign matter that has entered between the inner wall 11 of the cylinder 10 and the cylinder pin 20. There is.

  According to such a configuration, the foreign matter that has entered between the inner wall 11 of the cylinder 10 and the cylinder pin 20 is accommodated in the recess 22, so that the foreign matter remains between the inner wall 11 of the cylinder 10 and the cylinder pin 20. Is prevented. Therefore, the foreign matter is prevented from increasing the friction between the inner wall 11 of the cylinder 10 and the cylinder pin 20. Accordingly, even when foreign matter enters between the cylinder pin 20 that opens and closes the first discharge port 12 and the second discharge port 13 and the inner wall 11 of the cylinder 10, the first discharge port 12 and the second discharge port 13. It is possible to perform opening and closing at a timing intended.

  In the mixing device 100 according to the present embodiment, the recess 22 is formed in the cylinder pin 20 and has a spiral shape along the axis X of the cylinder pin 20.

  According to such a configuration, since the recesses 22 are periodically formed along the direction of the axis X of the cylinder pin 20, the foreign matter that has entered the gap between the inner wall 11 of the cylinder 10 and the cylinder pin 20 is removed. It can be efficiently accommodated in the recess 22. Moreover, since the recessed part 22 has a continuous spiral shape, the foreign matter accommodated in the recessed part 22 can move in the recessed part 22. Therefore, since the foreign material can be uniformly stored in the recess 22, the substantial storage capacity of the recess 22 is improved.

  Further, in the mixing device 100 according to the present embodiment, the cylinder 10 has a pressure chamber 90 to which a working fluid that causes the cylinder pin 20 to move back and forth by applying fluid pressure to the cylinder pin 20 is supplied. And the recessed part 22 formed in the cylinder pin 20 is arrange | positioned in the site | part 23 which continues in contact with the inner wall 11 between the pressure chamber 90 and the mixing chamber 30 while the cylinder pin 20 moves back and forth.

  According to such a configuration, it is possible to prevent foreign matter contained in the recess 22 from being mixed into the pressure chamber 90. Thereby, the reliability of the operation of the pressure chamber 90 is improved. In addition, the maintainability of the oil used in the pressure chamber 90 is improved.

  In addition, the mixing apparatus 100 according to this embodiment further includes a nozzle 121 that supplies the cleaning liquid 230 to the recess 22.

  According to such a configuration, the foreign matter accumulated in the recess 22 can be washed away. Thereby, it can prevent that the accommodation capacity of the recessed part 22 falls because a foreign material continues to accumulate in the recessed part 22. FIG. Therefore, foreign matter can be more reliably prevented from remaining between the inner wall 11 of the cylinder 10 and the cylinder pin 20.

  The mixing apparatus 100 according to the present embodiment further includes a control unit 360 that drives the cleaning solution pump 122 that supplies the cleaning solution 230 to the nozzle 121. Then, in the control unit 360, the first time T1 until the first discharge port 12 and the second discharge port 13 change from the closed state to the open state, or the first discharge port 12 and the second discharge port 13 are open When any one of the second time T2 from when the state is changed to the closed state exceeds the reference value, the cleaning solution pump 122 is driven.

  According to such a configuration, the opening and closing of the first discharge port 12 and the second discharge port 13 can be more reliably prevented from being performed at unintended timing. Further, since the cleaning of the concave portion 22 can be suppressed to the minimum necessary, the cost required for the cleaning can be reduced.

  The mixing apparatus 100 according to the present embodiment further includes a pipe 124 that collects the cleaning liquid 230 supplied to the recess 22 and returns the cleaning liquid 230 from the recess 22 to the cleaning liquid pump 122. The pipe 124 includes a filter 125 that filters impurities contained in the cleaning liquid 230 that flows through the pipe 124.

  According to such a configuration, since the cleaning liquid 230 can be circulated and reused repeatedly, the cost required for cleaning can be further reduced.

  Further, in the mixing apparatus 100 according to the present embodiment, the cleaning liquid 230 is a solvent used for the first liquid 210 discharged from the first discharge port 12 and the second liquid 220 discharged from the second discharge port 13. It is the same.

  According to such a configuration, even when the cleaning liquid 230 leaks to the mixing chamber 30 side, it is possible to prevent the quality of the resin formed by mixing the first liquid 210 and the second liquid 220 from being deteriorated.

Second Embodiment
In the first embodiment, the recess 22 that accommodates the foreign matter that has entered between the inner wall 11 of the cylinder 10 and the cylinder pin 20 is formed in a portion of the cylinder pin 20 that contacts the inner wall 11 of the cylinder 10. However, the recess that accommodates the foreign matter that has entered between the inner wall of the cylinder and the cylinder pin may be formed in a portion that contacts the cylinder pin on the inner wall of the cylinder.

  FIG. 10A is a schematic view showing a mixing apparatus 400 according to the present embodiment, and FIG. 10B is an enlarged view of a portion surrounded by a broken line portion M3 of FIG. 10A.

  In the mixing device 400 according to the present embodiment, a concave portion 414 that accommodates foreign matter that has entered between the inner wall 411 of the cylinder 410 and the cylinder pin 420 is formed at a portion that contacts the cylinder pin 420 on the inner wall 411 of the cylinder 410. The configuration is the same as that of the mixing device 100 according to the first embodiment except for the following points. The same components as those of the mixing apparatus 100 according to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 10, the inner wall 411 of the cylinder 410 according to the present embodiment is formed with a recess 414 that accommodates foreign matter that has entered between the inner wall 411 of the cylinder 410 and the cylinder pin 420. In the present embodiment, the recess 414 has a spiral shape along the inner wall 411 of the cylinder 410.

  It is apparent that the mixing apparatus 400 according to the present embodiment also exhibits the same effects as the effects described above as the effects of the mixing apparatus 100 according to the first embodiment.

  The present invention is not limited only to the above-described first and second embodiments, and various modifications can be made within the scope of the claims.

  For example, the recess for containing foreign matter that has entered between the inner wall of the cylinder and the cylinder pin may be formed in both the portion of the inner wall of the cylinder that contacts the cylinder pin and the portion of the cylinder pin that contacts the inner wall of the cylinder.

  Moreover, in Embodiment 1 and Embodiment 2, although the recessed part which accommodates the foreign material which got in between the inner wall of a cylinder and a cylinder pin was formed having a helical shape, the form of the said recessed part is the inner wall of a cylinder, a cylinder pin, It is not limited as long as it can accommodate the foreign matter that has entered between. For example, the concave portion can have a ring shape, a linear shape, and other various shapes.

  Moreover, in Embodiment 1 and Embodiment 2, although the mixing apparatus mixed two different liquids, you may comprise so that two or more types of liquids may be mixed.

  Furthermore, in Embodiment 1 and Embodiment 2, the cleaning liquid 230 is the same as the solvent used for the first liquid 210 discharged from the first discharge port 12 and the second liquid 220 discharged from the second discharge port 13. I made it. However, the cleaning liquid 230 may be the same as at least one solvent of the first liquid 210 discharged from the first discharge port 12 or the second liquid 220 discharged from the second discharge port 13.

10 cylinders,
11 inner wall,
12 1st discharge port (discharge port) ,
13 Second discharge port (discharge port)
14 First collection port (collection port),
15 Second collection port (collection port),
20 cylinder pins,
21 Sliding part (the part that contacts the inner wall of the cylinder pin)
22 recesses,
23 A part that continues to contact the inner wall between the pressure chamber and the mixing chamber
25 1st circulation path (circulation path),
26 Second circuit (circulation path),
30 mixing chamber,
90 pressure chamber,
100 mixing device,
110 drive mechanism,
120 cleaning mechanism,
121 nozzles,
122 Cleaning liquid pump,
124 piping (piping section),
125 filters,
210 First liquid,
220 Second liquid,
230 cleaning fluid,
300 molding equipment,
310 molds,
320 press section,
330 feeder,
340 suction part,
350 sensors,
360 control unit,
T1 first time (time until the discharge port changes from the closed state to the open state),
T2 second time (time until the discharge port changes from the open state to the closed state),
Ts reference value,
X axis.

Claims (7)

A cylinder internally provided with a mixing chamber in which a resin used for resin molding is formed by mixing at least two different liquids discharged from discharge ports provided on an inner wall;
A cylinder pin that opens and closes the discharge port by moving back and forth along the inner wall of the cylinder ;
A recovery port provided on the inner wall of the cylinder for recovering each of the at least two different liquids discharged from the discharge port;
A circulation path provided in the cylinder pin and capable of fluidly communicating the discharge port and the recovery port ;
A recess that accommodates foreign matter that has entered between the inner wall of the cylinder and the cylinder pin in at least one of a portion that contacts the cylinder pin in the inner wall of the cylinder or a portion that contacts the inner wall of the cylinder in the cylinder pin. Is formed separately from the circulation path .   The mixing device according to claim 1, wherein the recess is formed in the cylinder pin and comprises a helical shape along the axis of the cylinder pin. The cylinder has a pressure chamber to which a working fluid is supplied to move the cylinder pin back and forth by applying a fluid pressure to the cylinder pin,
The concave portion formed in the cylinder pin is disposed at a portion where the inner wall between the pressure chamber and the circulation path and the cylinder pin are kept in contact with each other while the cylinder pin advances and retreats. The mixing apparatus according to claim 2.   The mixing apparatus according to any one of claims 1 to 3, further comprising a nozzle for supplying a cleaning liquid to the recess. A controller that drives a pump that supplies the cleaning liquid to the nozzle;
The control unit, when either the time until the discharge port changes from the closed state to the open state or the time until the discharge port changes from the open state to the closed state exceeds a reference value The mixing apparatus according to claim 4, wherein the pump is driven. A pipe part for recovering the cleaning liquid supplied to the concave part and returning it from the concave part to the pump;
The mixing apparatus according to claim 5, wherein the piping unit includes a filter that filters impurities contained in the cleaning liquid flowing through the piping unit.   The mixing apparatus according to any one of claims 4 to 6, wherein the cleaning liquid is the same as a solvent used in at least one of the two liquids discharged from the discharge port.