JP2017144580A - Mold device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable molding a molded article on an outer peripheral surface of a shaft.SOLUTION: A mold device has a rotary driving mechanism 51, a holding part 52 rotary driven by the rotary driving mechanism 51 and for holding a rotary shaft 90 to be same shaft as the rotary driving mechanism 51, a nozzle 30 arranged in outer side in a diameter direction of the rotary shaft 90 and discharging a curable material in an inside of the diameter direction of the rotary shaft 90 toward the outer peripheral shaft 90 and a direct acting derive mechanism 20 for driving the nozzle 30 to the holding part 52 so that the nozzle 30 moves in the shaft direction of the rotary shaft 90 relatively to the rotary shaft 90.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a molding apparatus that molds a molding on the outer peripheral surface of a rotating shaft by discharging a curable material inward in the radial direction of the rotating shaft.

  In Patent Document 1, the position of the molding table is controlled by an XY axis control device, Z so that the nozzle disposed above the molding table moves and rotates relative to the molding table in the X, Y, and Z directions. A technique is disclosed in which a molten material is discharged downward from a nozzle while being performed by an axis controller and a θ-axis controller. In Patent Document 1, it is not clarified how the nozzle and the molding table are oriented with respect to the X direction (X axis), the Y direction (Y axis), the Z direction (Z axis), and the θ axis. Since the molten material discharged from the nozzle is laminated on the molding table, the molded article is molded so as to grow in the vertical direction of the molding table.

JP 2002-127251 A

In order to mold a molded article on the outer peripheral surface of the shaft using the technique described in Patent Document 1, it is necessary to place the molded product on a molding table with the shaft lying down. In such a case, the molten material cannot be laminated on the entire outer peripheral surface of the shaft. On the other hand, when the shaft is set up on the molding table, the molten material discharged from the nozzle falls downward along the outer peripheral surface of the shaft, so that the molten material does not adhere to the outer peripheral surface of the shaft, and A molded object cannot be molded on the outer peripheral surface.
Then, this invention is made | formed in view of the said situation, and the subject which this invention tends to solve is enabling it to shape | mold a molded article on the outer peripheral surface of a shaft.

  A main invention for achieving the above object includes a rotation drive mechanism, a holding unit that is rotated by the rotation drive mechanism and holds the rotation shaft so as to be coaxial with the axis of the rotation drive mechanism, and the rotation shaft A nozzle that is arranged radially outward and discharges the curable material radially inward of the rotary shaft toward the outer peripheral surface of the rotary shaft; and the nozzle is relatively relative to the rotary shaft And a linear motion drive mechanism that drives the nozzle or the holding portion so as to move in the axial direction.

  Other characteristics of the present invention will be made clear by the description and drawings described later.

  According to the present invention, a model can be molded on the outer peripheral surface of the rotating shaft.

FIG. 1 is a front view of the molding apparatus. FIG. 2 is a plan view of the molding apparatus.

  At least the following matters will be apparent from the description and drawings described below.

A rotative drive mechanism, a holding unit that is rotationally driven by the rotary drive mechanism and that holds the rotary shaft so as to be coaxial with the axis of the rotary drive mechanism, and a curable material disposed radially outward of the rotary shaft A nozzle that discharges radially inward of the rotary shaft toward the outer peripheral surface of the rotary shaft, and the nozzle or the nozzle so that the nozzle moves in the axial direction of the rotary shaft relative to the rotary shaft A molding apparatus provided with a linear motion drive mechanism for driving the holding portion becomes clear.
Thereby, since the nozzle discharges the curable material inward in the radial direction of the rotating shaft, the curable material discharged from the nozzle adheres to the outer peripheral surface of the rotating shaft or a layer deposited on the outer peripheral surface. Further, since the nozzle is moved in the axial direction of the rotation axis relative to the rotation axis by the linear drive mechanism and the rotation axis is rotated by the rotation drive mechanism, the curable material is laminated on the entire outer peripheral surface of the rotation axis. can do. Therefore, a molded article can be molded on the outer peripheral surface of the rotating shaft.

It is desirable that the rotation drive mechanism intermittently drives the holding unit to rotate, and the linear drive mechanism drives the nozzle or the holding unit in the axial direction of the rotation shaft while the holding unit is temporarily stopped.
Further, it is desirable that the discharge direction of the nozzle is vertically downward, and the axial direction of the rotating shaft is a horizontal direction.
As a result, when the nozzle moves in the axial direction of the rotating shaft relative to the rotating shaft while the holding unit and the rotating shaft are temporarily stopped, the nozzle discharges the curable resin and is discharged from the tip of the nozzle. The curable material is deposited so as to follow the generatrix of the outer peripheral surface of the rotating shaft. Since the curable material is deposited during the temporary stop of the rotating shaft, the outer peripheral surface of the rotating shaft or the curable resin attached to the deposited layer on the outer peripheral surface is stabilized.

The molding apparatus drives the nozzle or the holding portion so that the nozzle moves relative to the rotation axis in a direction orthogonal to the axial direction of the rotation shaft and the discharge direction of the nozzle. It is desirable to further include a two-linear drive mechanism.
As a result, even if the rotation axis is deviated from the axis of the rotation drive mechanism due to an error, the nozzle can be moved by the combination of the movement by the linear drive mechanism and the movement by the second linear drive mechanism. It can move along the generatrix of the outer peripheral surface.

The molding apparatus further includes a third linear motion drive mechanism for driving the nozzle or the holding portion so that the nozzle moves relative to the rotation axis in a direction parallel to the discharge direction of the nozzle. It is desirable to provide.
Thereby, even if the thickness of the layer of the outer peripheral surface of a rotating shaft increases by laminating | stacking a curable material on the outer peripheral surface of a rotating shaft, the space | interval of a layer surface and a nozzle can be controlled to an appropriate distance. .

In the molding apparatus, it is preferable that the rotating shaft is made of a metal material, an outer peripheral surface of the rotating shaft is formed to be uneven, and the nozzle discharges a thermoplastic resin as the curable material.
Thereby, the thermoplastic resin discharged from the nozzle is easily fixed on the outer peripheral surface of the rotating shaft. Therefore, the molded product made of the thermoplastic resin and the rotating shaft made of the metal material can be integrated.

=== Embodiment ===
Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention. Therefore, the scope of the present invention is not limited to the following embodiments and illustrated examples.

<About modeling equipment>
FIG. 1 is a front view of the molding apparatus 1, and FIG. 2 is a side view of the molding apparatus 1.
As shown in FIGS. 1 and 2, the molding apparatus 1 includes a machine frame 10, a nozzle 30, a rotation drive mechanism 51, a chuck (holding portion) 52, a linear motion drive mechanism 20 in the X-axis direction, and a Y A linear motion drive mechanism 40 in the axial direction and a linear motion drive mechanism (lifting part 35) in the Z-axis direction are provided. Here, the X axis, the Y axis, and the Z axis are orthogonal to each other.

<About the machine frame>
The machine frame 10 has a plate-like base portion 11, side portions 12 and 13, and a rear portion 14. The side portions 12 and 13 are erected on the left and right sides of the base portion 11, the rear portion 14 is erected on the rear portion of the base portion 11, and the rear portions of the side portions 12 and 13 are connected to each other.

<About the X-axis direction linear drive mechanism>
The X-axis direction linear motion drive mechanism 20 includes linear guide members 21 and 22, a carriage 25, an X-axis direction linear motion transmission mechanism and a motor 26.
The left and right ends of the linear guide members 21 and 22 are supported by the side portions 12 and 13, and the linear guide members 21 and 22 are installed between the side portions 12 and 13 so as to extend to the left and right. The direction in which the linear guide members 21 and 22 extend is the X-axis direction.

  A carriage 25 is slidably attached to the linear guide members 21 and 22. The carriage 25 is provided so as to be movable along the linear guide members 21 and 22 in the X-axis direction. The power of the motor 26 is transmitted to the carriage 25 by the X-axis direction linear transmission mechanism, and the carriage 25 is moved in the X-axis direction by the motor 26. The X-axis direction linear transmission mechanism is, for example, a belt transmission mechanism, a chain transmission mechanism, a ball screw transmission mechanism, or a pinion rack mechanism.

<Z-axis direction linear drive mechanism and nozzle>
A nozzle 30 and an elevating part 35 are mounted on the carriage 25. The nozzle 30 is attached to the carriage 25 via the elevating part 35 with the tip thereof directed vertically downward. The elevating unit 35 drives the nozzle 30 in the Z-axis direction.

<About thermoplastic resin supply system>
In addition to the nozzle 30 and the lifting / lowering unit 35, a tank 31, a heater 33, and a supply unit 34 are also mounted on the carriage 25.
The nozzle 30 is connected to a tank 31 through a pipe. The tank 31 stores a thermoplastic resin. The tank 31 and the nozzle 30 are provided with a heater 33, and the thermoplastic resin in the tank 31 and the nozzle 30 is heated and melted by the heater 33. Resin melted by the heater 33 is sent from the tank 31 to the tip of the nozzle 30 by the supply unit 34, and the nozzle 30 discharges the molten resin vertically downward from the tip by the pressure of the supply unit 34. The discharge direction of the nozzle 30 is parallel to the Z-axis direction and is orthogonal to the X-axis direction and the Y-axis direction.

<Regarding the Y-axis direction linear drive mechanism>
The Y-axis direction linear drive mechanism 40 includes a linear guide member 41, a moving body 42, a Y-axis direction linear motion transmission mechanism, and a motor 46.
The linear guide member 41 is provided on the base portion 11 so as to extend in the front-rear direction. The linear guide member 41 is orthogonal to the linear guide members 21 and 22 when viewed from above or from below. The direction in which the linear guide member 41 extends is the Y-axis direction.

  A movable body 42 is slidably attached to the linear guide member 41. The moving body 42 is provided so as to be movable along the linear guide member 41 in the Y-axis direction. The power of the motor 46 is transmitted to the moving body 42 by the Y-axis direction linear transmission mechanism, and the moving body 42 is moved in the Y-axis direction by the motor 46. The Y-axis direction linear transmission mechanism is, for example, a belt transmission mechanism, a chain transmission mechanism, a ball screw transmission mechanism, or a pinion rack mechanism.

<Rotation drive mechanism, chuck and rotating shaft>
A rotation drive mechanism (for example, a motor) 51 is attached to the moving body 42, and a power output shaft of the rotation drive mechanism 51 is provided in parallel to the linear guide members 21 and 22. A chuck 52 that holds the rotary shaft 90 is attached to the power output shaft of the rotary drive mechanism 51. The rotating shaft 90 can be attached to and detached from the chuck 52. In a state where the rotating shaft 90 is fixed to the chuck 52, the rotating shaft 90 and the power output shaft of the rotation drive mechanism 51 are arranged coaxially. However, the rotation shaft 90 and the power output shaft of the rotation drive mechanism 51 may be arranged completely coaxially without causing an error in the attachment of the rotation shaft 90 to the chuck 52, but the rotation shaft 90 is attached to the chuck 52. An error may occur, and the rotation shaft 90 may be slightly deviated from the power output shaft of the rotation drive mechanism 51.

  The rotating shaft 90 is made of, for example, a resin material, a ceramic material, a glass material, or a metal material. When the rotating shaft 90 is a ceramic material, a glass material, or a metal material, the outer peripheral surface of the rotating shaft 90 is formed with irregularities due to graining, knurling, or the like.

<About the control unit>
The motors 26 and 46, the rotation drive mechanism 51, the heater 33, the supply unit 34, and the elevating unit 35 are controlled by the control unit.

<Operation of modeling equipment>
Then, the operation | movement of the molding apparatus 1 and the usage method of the molding apparatus 1 are demonstrated.
The end of the rotating shaft 90 is attached to the chuck 52, and the rotating shaft 90 extends in the X-axis direction. Further, the thermoplastic resin in the tank 31 and the nozzle 30 is heated by the heater 33 to melt the thermoplastic resin.

Next, the motor 26 operates to move the carriage 25 to one end of the linear guide members 21 and 22.
Next, the motor 46 is operated, and the moving body 42, the rotation drive mechanism 51, the chuck 52, and the rotation shaft 90 are moved in the Y-axis direction by the motor 46, so that the axis of the rotation shaft 90 moves to the tip of the nozzle 30. The nozzle 30 is positioned directly below, and the nozzle 30 is positioned radially outward of the rotating shaft 90, specifically, above. In this state where the rotary shaft 90 and the nozzle 30 are positioned, when the Z axis is extended from the tip of the nozzle 30, the extension line intersects the outer peripheral surface of the rotary shaft 90 and the shaft center of the rotary shaft 90. Also cross.

  Thereafter, the carriage 25 and the nozzle 30 are reciprocated in the X-axis direction by the motor 26, and the chuck 52 and the rotary shaft 90 are rotated around the power output shaft of the rotary drive mechanism 51 by the rotary drive mechanism 51. The outer peripheral surface of the shaft 90 is scanned by the tip of the nozzle 30. During the movement of the carriage 25, the thermoplastic resin melted by the supply unit 34 is sent to the nozzle 30 and discharged from the tip of the nozzle 30 toward the outer peripheral surface of the rotating shaft 90. The injection timing of the thermoplastic resin (operation timing of the supply unit 34) is controlled by the control unit based on the data of the three-dimensional model, and the thermoplastic resin is laminated on the outer peripheral surface of the rotating shaft 90, so that the thermoplastic resin A modeled object that is a laminate is molded around the rotating shaft 90. That is, the modeled object is molded so as to grow outward in the radial direction of the rotating shaft 90. The thermoplastic resin discharged from the nozzle 30 adheres to the outer peripheral surface of the rotating shaft 90 or the deposited thermoplastic resin, and is cured by natural air cooling immediately after the adhesion.

  The relationship between the operation timing of the carriage 25 by the motor 26 and the operation timing of the rotating shaft 90 by the rotation drive mechanism 51 will be described in detail. The rotary shaft 90 is intermittently rotated by a predetermined angle in the same direction by the rotation drive mechanism 51. Then, while the rotation of the rotating shaft 90 is temporarily stopped, the carriage 25 is moved forward from one end of the linear guide members 21 and 22 to the other end by the motor 26, and then the rotating shaft 90 is rotated. While temporarily stopped, the carriage 25 is moved back from the other end of the linear guide members 21 and 22 to one end by the motor 26. Such a movement is repeated.

  During the movement of the carriage 25, the tip of the nozzle 30 is moved along the generatrix 91 on the outer peripheral surface of the rotating shaft 90 above the rotating shaft 90. Accordingly, the thermoplastic resin discharged from the tip of the nozzle 30 is deposited so as to trace the bus bar 91 on the outer peripheral surface of the rotating shaft 90.

  When there is an attachment error of the rotary shaft 90 with respect to the chuck 52 and the rotary shaft 90 is deviated with respect to the power output shaft of the rotary drive mechanism 51, the moving body moves in accordance with the movement of the carriage 25 as described above. 42 is also moved in the Y-axis direction by the motor 46. Specifically, when the rotating shaft 90 is temporarily stopped, the deviation angle of the rotating shaft 90 around the Z axis with respect to the X axis is detected by a detector or the like, and the moving speed of the moving body 42 and the carriage 25 are The speeds of the motors 26 and 46 are controlled by the control unit so that the ratio to the moving speed is in accordance with the detected deflection angle. Accordingly, even if the rotation shaft 90 is deviated from the X axis around the Z axis, the tip of the nozzle 30 is moved along the generatrix 91 on the outer peripheral surface of the rotation shaft 90 above the rotation shaft 90.

  During molding of the modeled object, the thickness of the thermoplastic resin layer on the outer peripheral surface of the rotating shaft 90 increases and the thickness of the thermoplastic resin layer is not uniform. Even in such a case, during the movement of the carriage 25 as described above, the elevating unit 35 is controlled by the control unit based on the data of the three-dimensional model, and the position of the nozzle 30 in the Z-axis direction is controlled. The distance from the tip of the nozzle 30 to the surface of the thermoplastic resin layer (however, when there is no thermoplastic resin between the tip of the nozzle 30 and the outer peripheral surface of the rotating shaft 90) Kept constant.

<About effects and benefits>
According to the above embodiment, the following effects can be obtained.
(1) Since the nozzle 30 discharges the thermoplastic resin toward the outer peripheral surface of the rotary shaft 90 to the inside of the diameter method of the rotary shaft 90, the curable material discharged from the nozzle 30 is the outer peripheral surface of the rotary shaft 90 or the outer periphery thereof. It adheres securely to the resin layer deposited on the surface. Further, since the rotating shaft 90 is intermittently rotated and the nozzle 30 is moved in the X-axis direction during a temporary stop period of the rotating shaft 90, the thermosetting resin is laminated on the entire outer peripheral surface of the rotating shaft 90. A molded object can be molded.

(2) Since the thermoplastic resin discharged from the tip of the nozzle 30 is deposited so as to trace the generatrix 91 of the outer peripheral surface of the rotating shaft 90 from above the rotating shaft 90, the thermoplastic resin is outer peripheral surface of the rotating shaft 90. Or after adhering to the deposited resin layer, it does not flow down in the circumferential direction of the rotating shaft 90 due to gravity. In particular, since the thermoplastic resin is discharged from the tip of the nozzle 30 during the temporary stop of the rotating shaft 90, the thermoplastic resin does not flow due to centrifugal force or gravity after adhering.

(3) Since irregularities are formed on the outer peripheral surface of the rotating shaft 90, the thermoplastic resin discharged from the tip of the nozzle 30 is easily fixed on the outer peripheral surface of the rotating shaft 90. Therefore, the molded product made of the thermoplastic resin and the rotating shaft 90 made of the metal material can be integrated.

(4) By moving the nozzle 30 in the Z-axis direction by the elevating part 35, the distance from the tip of the nozzle 30 to the location where the thermoplastic resin is adhered can be adjusted appropriately.

(5) Even if the axis of the rotating shaft 90 is deviated due to an error, the nozzle 30 is discharged from the tip of the nozzle 30 by combining the movement of the nozzle 30 in the X-axis direction and the movement of the rotating shaft 90 in the Y-axis direction. The thermoplastic resin is deposited so as to accurately trace the bus 91 on the outer peripheral surface of the rotating shaft 90 from above the rotating shaft 90.

<About modification>
As mentioned above, although the form for implementing this invention was demonstrated, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention. Changes from the above embodiment will be described below. The changes described below may be applied in combination as much as possible.

(1) In the above embodiment, the rotation drive mechanism 51, the chuck 52, and the rotation shaft 90 are configured to move in the Y axis direction by the linear guide member 41, the moving body 42, the Y axis direction linear motion transmission mechanism, and the motor 46. . On the other hand, the rotation drive mechanism 51 may be attached to, for example, the side portion 12, and the rotation drive mechanism 51, the chuck 52, and the rotation shaft 90 may not move in the Y-axis direction. In this case, the linear guide members 21 and 22, the carriage 25, the motor 26, and the X-axis direction linear transmission mechanism are driven so as to move in the Y-axis direction integrally by the Y-axis direction linear drive mechanism.

(2) In the above embodiment, the nozzle 30 is configured to move in the X-axis direction by the linear guide members 21 and 22, the carriage 25, the motor 26, and the X-direction linear motion transmission mechanism. On the other hand, the carriage 25 may be a fixed portion fixed to the center of the linear guide members 21 and 22, for example, and the nozzle 30 may not move in the X-axis direction. In this case, the linear guide member 41, the moving body 42, the motor 46, and the Y-axis direction linear transmission mechanism are driven so as to integrally move in the X-axis direction by the linear drive mechanism.

(3) In the above embodiment, the nozzle 30 is configured to move in the Z-axis direction by the elevating unit 35. On the other hand, the nozzle 30 may be fixed to the carriage 25 and the nozzle 30 may not move in the Z-axis direction. In this case, the linear guide member 41, the moving body 42, the motor 46, and the Y-axis direction linear transmission mechanism are driven so as to move integrally in the Z-axis direction by the elevating unit.

(4) In the above embodiment, the hot-melt material stored in the tank 31 is a thermoplastic resin, but it may be a low-melting metal (for example, solder).

(5) In the above embodiment, the thermoplastic resin is supplied to the nozzle 30 by the supply unit 34 while being melted by the heater 33, but the solidified thermoplastic resin or low-temperature melting metal is supplied to the nozzle 30. Also good. In this case, a wire made of a thermoplastic resin or a low-melting metal is wound around a reel around the rear portion 14, for example, and the wire drawn from the reel is guided to the tip of the nozzle 30 by a roller, a pulley, etc. A heater is provided at the tip of the nozzle 30. Then, the roller or pulley is rotated and driven by a motor or the like, so that the wire is sent to the nozzle 30, the tip of the wire is heated and melted by the heater at the tip of the nozzle 30, and the molten material is It is discharged from. Here, the combination of the roller, the pulley, and the motor is a supply unit that supplies the wire to the nozzle 30.

(6) In the above embodiment, the material stored in the tank 31 is a thermoplastic resin, whereas the ultraviolet curable resin is stored in the tank 31 and the nozzle 33 discharges the ultraviolet curable resin. Good. In this case, the heater 33 is not provided. Further, an ultraviolet irradiator for irradiating ultraviolet rays toward the outer peripheral surface of the rotating shaft 90 is installed above the carriage 25 and the rotating shaft 90, and the ultraviolet curable material attached to the outer peripheral surface of the rotating shaft 90 or the deposited resin. The resin is cured by ultraviolet rays.

  DESCRIPTION OF SYMBOLS 1 ... Molding apparatus, 20 ... X-axis direction linear drive mechanism, 30 ... Nozzle, 35 ... Elevating part (third linear drive mechanism), 40 ... Y-axis direction linear drive mechanism (second linear drive mechanism) ), 51 ... Rotation drive mechanism, 52 ... Chuck (holding part)

Claims (6)

A rotation drive mechanism;
A holder that is rotationally driven by the rotary drive mechanism and holds the rotary shaft so as to be coaxial with the axis of the rotary drive mechanism;
A nozzle that is arranged radially outward of the rotating shaft and discharges a curable material radially inward of the rotating shaft toward an outer peripheral surface of the rotating shaft;
And a linear motion drive mechanism that drives the nozzle or the holding portion so that the nozzle moves in the axial direction of the rotation shaft relative to the rotation shaft.   The rotation driving mechanism intermittently drives the holding unit to rotate, and the linear motion driving mechanism drives the nozzle or the holding unit in the axial direction of the rotating shaft while the holding unit is temporarily stopped. The molding apparatus as described.   The molding apparatus according to claim 1 or 2, wherein a discharge direction of the nozzle is vertically downward, and an axial direction of the rotation shaft is a horizontal direction.   A second linear drive mechanism that drives the nozzle or the holding portion so that the nozzle moves relative to the rotation shaft in a direction orthogonal to the axial direction of the rotation shaft and the discharge direction of the nozzle. The molding apparatus according to any one of claims 1 to 3, further comprising:   The apparatus further comprises a third linear drive mechanism that drives the nozzle or the holding portion so that the nozzle moves relative to the rotation axis in a direction parallel to the discharge direction of the nozzle. The molding apparatus according to any one of 4.   The molding according to any one of claims 1 to 5, wherein the rotating shaft is made of a metal material, an outer peripheral surface of the rotating shaft is formed to be uneven, and the nozzle discharges a thermoplastic resin as the curable material. apparatus.

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