JP6007833B2 - Rotary manufacturing equipment - Google Patents

Description

  The present invention relates to a rotary manufacturing apparatus.

  2. Description of the Related Art Conventionally, a rotary manufacturing apparatus is known in which a manufacturing process sequentially proceeds in a plurality of work units provided on a rotary table as the rotary table rotates. Here, the “work unit” is a collective term for a set of members that support or receive a work that is a workpiece. For example, in the case of a molding machine or press machine, when the workpiece is liquid, such as a molding die that molds the workpiece, in the case of an assembly machine, a receiving jig that receives the workpiece, or a mixing device for food or chemicals. A container or the like for injecting liquid corresponds to the work unit.

  Some of these rotary manufacturing apparatuses are provided with a drive mechanism that moves action means for applying pressure, supply, operation, and the like to the work unit in a direction parallel to the rotation axis. For example, in the rotary compression molding machine disclosed in Patent Document 1, a die filled with powder corresponds to a work unit, and upper and lower punches that move from above and below the die and compress the powder in the die are compressed. It corresponds to an action means. The lower eyelid is pushed up by transmitting the driving force of a solenoid, which is a lifting drive source, via a drive mechanism such as a drive lever, a push-up lever, a forming roll, or a take-out cam.

Japanese Utility Model Publication No. 62-17190

In the apparatus of Patent Document 1, an elevating drive source for elevating a forming roll and a take-out cam via a push-up lever is provided in addition to a rotation drive source that rotates a rotating disk. In this example, since the forming roll and the take-out cam are relatively close to each other in the circumferential direction, the driving force of one lifting drive source is used in common. It is considered that it is necessary to further provide another elevating drive source when driving each. Therefore, there are problems that the number of drive sources increases, the configuration of the device becomes complicated, and the size of the device becomes large.
Further, the apparatus of Patent Document 1 only pushes the lower eyelid upward from the lower side, and the return from the upper side to the lower side depends on the gravity of the lower eyelid. Therefore, when a foreign object bites into the sliding portion, the lower eyelid does not fall, and the operation may be uncertain. Further, this configuration cannot be applied to a horizontal machine.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to reduce the number of drive sources in a rotary manufacturing apparatus provided with a drive mechanism that moves an action means in a direction parallel to the rotation axis, and An object of the present invention is to provide a rotary manufacturing apparatus capable of reliably operating an action means.

Rotary manufacturing apparatus of the present invention, obtain Preparations and rotary table, a rotary drive source for generating a driving force for rotating the rotary table, a plurality of work units, and the cam rail, a plurality of working means.
The plurality of work units are arranged on a circumference around the rotation axis of the rotary table, and rotate together with the rotary table.
The cam rail is provided around at least one of the plurality of work units in the rotation axis direction, and is formed such that the position in the rotation axis direction changes according to the position in the circumferential direction.
The plurality of action means are provided corresponding to each work unit, move along the shape of the cam rail while rotating together with the rotary table, move in the direction of the rotation axis, and periodically approach or separate from the corresponding work unit.
Further, the work unit has an “oil chamber in which an oil introduction port for introducing pressure oil from the outside communicates and the pressure is finely adjusted by adjusting the amount of oil introduced into the oil introduction port”. Preferably, the pressure in the oil chamber is finely adjusted by an oil amount adjusting screw provided on the upstream side of the oil introduction port.
The rotary manufacturing apparatus of the present invention is characterized in that a product is manufactured by the operation of the action means for the work unit and the change in volume of the oil chamber.

With this configuration, the rotary manufacturing apparatus of the present invention can move the action means in the direction parallel to the rotation axis with respect to the work unit only by the driving force of the rotary drive source that rotates the rotary table. Therefore, the number of drive sources can be minimized. Therefore, the physique of the device can be made smaller than the device having a plurality of drive sources.
Further, the action means is forcibly driven in both directions in the rotation axis direction following the shape of the cam rail. Therefore, since the movement in one direction does not depend on the gravity of the action means itself as in the prior art, the action means can be operated reliably. In addition, this configuration can be applied to a horizontal machine.

The rotary manufacturing apparatus of the present invention can be used, for example, as a rotary compression molding machine that compresses or molds a fluid such as a molten resin or a powder material. In this case, the work unit comprises a molding die material that has been perforated to the oil chamber is formed a cavity to be filled, further reciprocating piston for pressurizing compress material in the cavity to change the volume of the oil chamber You may include the cylinder part accommodated so that movement is possible. Here, the “workpiece” is a general term for all workpieces supported or received by the work unit, such as materials before compression molding, semi-finished products in the middle of the process, and final molded products.
More specifically, an upper cam rail and a lower cam rail are provided in a vertical rotary compression molding machine, and the piston is driven using the lower cam rail to compress and compress the material in the cavity, and the upper cam rail is used. By driving the action means on the upper part of the molding die, the material supply port to the cavity can be opened and closed, and the molded product can be taken out.

It is a mimetic diagram showing the whole rotary compression molding machine composition by one embodiment of the present invention. It is a principal part enlarged view of FIG. 1 which shows the structure of an action | operation unit and a cam rail. It is a schematic diagram of the 1st process (material input process) of the rotary compression molding machine by one Embodiment of this invention. It is a schematic diagram of a 2nd process (die closing process) same as the above. It is a schematic diagram of a 3rd process (pressurization process) same as the above. It is a schematic diagram of the 4th process (pressure reduction process) same as the above. It is a schematic diagram of a 5th process (mold opening process) same as the above. It is a schematic diagram of a 6th process (molded article removal process) same as the above. It is a schematic diagram of a 7th process (molded product discharge process) same as the above.

Hereinafter, a rotary manufacturing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
(One embodiment)
A rotary manufacturing apparatus according to an embodiment of the present invention is a rotary compression molding machine that compresses and compresses an insulating powder material such as a metal oxide in the manufacture of a spark plug insulator.
As shown in FIG. 1, the rotary compression molding machine 10 includes a rotary table 11, a rotary frame 12, an upper cam rail 13, a lower cam rail 14, a column 15, a base 16, a drive motor 17, an upper operation unit 20, and a lower operation unit 25. , A vertical machine including a work unit 300 and other control panels (not shown).

  First, an overview of the overall configuration of the rotary compression molding machine 10 will be described with reference to FIG. Here, FIG. 1 schematically illustrates the main configuration of each member and the mutual relationship, and mechanical design matters such as connection and power transmission of each member are omitted. Further, FIG. 1A is not an accurate view in the direction of arrow a in FIG. 1B, but in order to make the state on the rotary table 11 easier to see, a virtual line (two-dot chain line) is assumed without the rotary frame 12. Is shown.

The support column 15 and the base 16 are stationary. The upper cam rail 13 and the lower cam rail 14 are supported by support means (not shown) and are stationary. The upper cam rail 13 is provided above the work unit 300, and the lower cam rail 14 is provided below the work unit 300, and the height is changed according to the position in the circumferential direction.
A drive motor 17 as a “rotation drive source” is accommodated in the support column 15. When the driving force of the driving motor 17 is transmitted by a power transmission mechanism (not shown), the rotary table 11 and the rotary frame 12 can be rotated synchronously with each other around the rotation axis O with respect to the stationary column 15 and the like. ing.

  A plurality of upper operation units 20, lower operation units 25, and work units 300 are provided on a virtual circumference V in a plan view and are substantially rotationally symmetrical (seven sets in this embodiment). The upper operation unit 20 and the lower operation unit 25 correspond to “operation means” described in the claims.

The work unit 300 including the molding die 30 and the cylinder unit 50 is mounted on the rotary table 11 and rotates together with the rotary table 11.
Lower operating unit 25, by the rod 28 is inserted into the cylinder portion 50 of the work unit 300, while rotating to follow the rotary table 11, vertically movable in the rotation axis direction (vertical direction in FIG. 1 (b)) It is.

The upper operation unit 20 can be moved up and down in the direction of the rotation axis while rotating following the rotary frame 12 by inserting the shaft portion 231 of the upper mold 23 through the hole formed in the rotary frame 12.
Therefore, the upper operation unit 20, the lower operation unit 25, and the work unit 300 are set as one set, and rotate around the rotation axis O. Each set of the upper operation unit 20, the lower operation unit 25, and the work unit 300 is provided coaxially with respect to the common unit central axis Q.

The positions at which the sets of the upper operation unit 20, the lower operation unit 25, and the work unit 300 sequentially move on the basis of the stationary base 16 are referred to as stages S1 to S7. For example, when attention is paid to the work unit 300 in the stage S1 of FIG. 1A, the work unit 300 rotates clockwise from the stage S1 in plan view, and passes through the stages S2, S3,. S7 is reached. In each stage, a series of manufacturing processes from a first process to a seventh process, which will be described later, are sequentially performed by the action of the upper operation unit 20 and the lower operation unit 25 on the work unit 300.
As described above, the rotary compression molding machine 10 performs a series of manufacturing steps while the rotary table 11 rotates once, and molds the molded product P.

Next, the detailed configuration of each part will be described with reference to FIGS.
First, the configuration of the work unit 300 will be described with reference to FIGS. 3 and 4. In the work unit 300, the upper molding die 30 and the lower cylinder part 50 are coupled.

The molding die 30 includes an outer block 31, an upper block 32, an inner block 33, a lower block 36, a bush 37, a rubber die 41, and the like. Among them, the member that directly forms the cavity C in which the molded product P is molded is the rubber mold 41, and the other members are pressures for holding the rubber mold 41 or for compressing and compressing the rubber mold 41. An oil path of the oil L is configured.
The rubber mold 41 has a bottomed cylindrical shape opened upward, and is held by the inner block 33 on the outer diameter side, the upper block 32 on the upper side, and the lower block 36 on the lower side. The rubber mold 41 is elastically deformable, and when the outer wall is pressed by the pressure oil L, the cavity C formed inside is compressed.

The outer block 31 houses the inner block 33, the upper block 32, the lower block 36, and the bush 37 as the outermost layer of the molding die 30, and holds them from the outside of the diameter.
The upper block 32 has a tapered material supply port 322 that opens upward. An end surface 321 on the mouth side of the material supply port 322 faces the body portion 232 of the upper mold 23. On the back side of the material supply port 322, a fitting hole 323 into which the tip of the pressure unit 233 of the upper mold 23 is fitted is formed.

  The inner block 33 has a rubber-type accommodation portion 34 on the inner diameter side. An annular oil passage 351 is formed between the inner block 33 and the outer block 31. Further, a plurality of radial oil passages 352 communicating with the annular oil passage 351 and the rubber mold accommodating portion 34 are formed in the rotation axis direction. The lowermost radial oil passage 352 communicates above the through hole 42 formed in the rubber mold 41.

The lower block 36 is formed with a distribution oil passage 353 communicating with the lower side of the through hole 42 of the rubber mold 41.
The cylindrical bush 37 presses the bottom surface of the lower block 36 from below, and an oil chamber 38 is formed inside. The oil chamber 38 communicates with an oil introduction port 39 for introducing the pressure oil L from the outside. By providing an oil amount adjusting screw (not shown) on the upstream side of the oil guide port 39, the oil amount can be adjusted and the pressure in the oil chamber 38 can be finely adjusted.

The cylinder part 50 includes a cylinder block 51 and a piston 55. The work unit 300 is fixed to the rotary table 11 by inserting the outer wall 521 of the cylinder block 51 into the mounting hole 111 of the rotary table 11 and coupling the flange surface 522 so as to contact the end surface 112 of the rotary table 11. .
The cylinder block 51 is formed with a cylinder 53 in which the small diameter portion 551 of the piston 55 slides on the inner wall and a storage chamber 54 in which the large diameter portion 552 of the piston 55 slides on the inner wall. The inner wall of the cylinder 53 and the upper end surface of the small diameter portion 551 of the piston 55 define the bottom of the oil chamber 38. The volume of the oil chamber 38 is changed by moving the piston 55 up and down.

Next, the upper operation unit 20 and the lower operation unit 25 will be described.
The upper operation unit 20 includes a housing 21, a cam follower 22, an upper mold 23, and a center pin 24. As shown in FIG. 2A, the roller-shaped cam follower 22 accommodated in the housing 21 is provided so as to sandwich the upper cam rail 13 from above and below. When the housing 21 and the cam follower 22 move in the circumferential direction with respect to the upper cam rail 13, the upper operation unit 20 moves up and down following the shape of the upper cam rail 13.

  In the upper mold 23, the shaft portion 231, the body portion 232, and the pressure portion 233 are connected coaxially. The shaft portion 231 passes through the rotary frame 12 and connects the housing 21 and the body portion 232. The body portion 232 has a relatively large diameter, and faces the end surface 321 of the upper block 32 of the molding die 30 when lowered. The pressure part 233 has a smaller diameter than the body part 232, and when lowered, the pressure part 233 is fitted into the fitting hole 323 of the upper block 32 and applies a load to the powder material M in the cavity C.

  The center pin 24 that is connected to the tip of the pressure unit 233 and has a smaller diameter than the pressure unit 233 is inserted into the center of the powder material M in the cavity C when lowered. Then, after the powder material M is compressed and cured around the center pin 24 and the molded product P is molded, the molded product P is pulled up with the molded product P around the center pin 24, thereby extracting the molded product P from the cavity C.

The lower operation unit 25 includes a housing 26, a cam follower 27, and a rod 28. As shown in FIG. 2B, which is the same as the upper operation unit 20, the roller-shaped cam follower 27 accommodated in the housing 26 is provided so as to sandwich the upper and lower sides of the lower cam rail 14. When the housing 26 and the cam follower 27 move in the circumferential direction with respect to the lower cam rail 14, the lower operation unit 25 moves up and down following the shape of the lower cam rail 14.
As shown in FIG. 4, the tip of the rod 28 has a bowl shape and is connected to the large-diameter portion 552 of the piston 55. Therefore, when the lower operation unit 25 moves up and down, the piston 55 reciprocates in the accommodation chamber 54 of the cylinder portion 50.

  As described above, the upper cam rail 13 and the lower cam rail 14 are formed so that the height changes according to the position in the circumferential direction. Therefore, as the rotary table 11 rotates, the upper operating unit 20 and the lower operating unit 25 move up and down following the shapes of the upper cam rail 13 and the lower cam rail 14, so that the center pin 24 or the rod 28 moves relative to the work unit 300. Approach or leave periodically.

  Next, a seven-stage manufacturing process by the rotary compression molding machine 10 will be described with reference to FIGS. These seven stages of manufacturing processes are sequentially executed in the seven stages S1 to S7 on the rotary table 11 shown in FIG. Through this manufacturing process, the piston 55 connected to the center pin 24 of the upper operation unit 20 and the rod 28 of the lower operation unit 25 moves up and down with respect to the work unit 300 along the unit center axis Q.

The upper operation unit 20 moves in three positions: an upper limit position UH, an intermediate position UM, and a lower limit position UL. In the drawing, the position of the height of the approximate center of the body portion 232 is shown. The lower operating unit 25 moves to the upper limit position only in the pressurization process which is the third process, and maintains the lower limit position in the other six processes.
In the drawing, the upward movement of the upper operation unit 20 or the piston 55 is indicated by a block arrow with the letters “UP” and the downward movement with the letters “DN”.

<First step (material input step)>
As shown in FIG. 3, the powder material M is charged into the cavity C of the rubber mold 41 from the material supply port 322 of the upper block 32 in the state where the upper operation unit 20 is at the upper limit position UH at the stage S <b> 1.

<Second process (mold closing process)>
As shown in FIG. 4, when the upper operation unit 20 is lowered to the lower limit position UL at the stage S2, the tip of the pressure part 233 of the upper mold 23 is in the upper block with the center pin 24 inserted into the powder material M. It fits in the 32 fitting holes 323, and a metal mold | die is closed. At this time, for example, a load of several tens of kN is applied to the powder material M in the cavity C.

<Third step (pressurizing step)>
As shown in FIG. 5, at stage S <b> 3, the piston 55 rises to the upper limit position of the storage chamber 54 as the rod 28 of the lower operation unit 25 rises. Thereby, the pressure oil L is pressurized to, for example, several tens of MPa, and the outer wall of the rubber mold 41 is pressed through the distribution oil passage 353, the annular oil passage 351, and the radial oil passage 352, as indicated by an arrow F. Then, the rubber material 41 is elastically deformed inward, whereby the powder material M in the cavity C is compressed and cured.

<4th process (pressure reduction process)>
Thereafter, as shown in FIG. 6, the piston 55 is lowered to the lower limit position of the storage chamber 54 as the rod 28 of the lower operation unit 25 is lowered at the stage S <b> 4. As a result, the pressure oil L is depressurized and returned to the oil chamber 38 side as indicated by the dashed arrow R. Accordingly, the rubber mold 41 that has been elastically deformed returns to its original shape.

<Fifth step (mold opening step)>
As shown in FIG. 7, at stage S5, the upper operation unit 20 moves up to the intermediate position UM. As a result, the tip of the pressure part 233 of the upper mold 23 is detached from the fitting hole 323 of the upper block 32 and the mold is opened, and the molded product P adheres to the periphery of the center pin 24 and comes out of the cavity C.

<Sixth step (molded product removal step)>
Subsequently, as shown in FIG. 8, in the state where the chuck arm 18 grips the molded product P in the stage S6, the center pin 24 rotates and the upper operation unit 20 rises to the upper limit position UH, so that the center pin 24 is Detach from the molded product P.

<Seventh step (molded product discharge step)>
Finally, as shown in FIG. 9, at stage S7, the chuck arm 18 holding the molded product P moves in the horizontal direction, and the molded product P is discharged to the outside.
The series of manufacturing steps is thus completed. Thereafter, when the process proceeds to stage S <b> 1 again, a new powder material M is put into the molding die 30. In this way, the molded product P is continuously produced.

As described above, in the rotary compression molding machine 10 of the present embodiment, the upper operating unit 20 and the lower operating unit 25 are rotated with respect to the work unit 300 only by the driving force of the driving motor 17 that rotates the rotary table 11. Can be moved in the direction.
As a rotary compression molding machine to be compared with the present embodiment, for example, an apparatus that includes a hydraulic cylinder, a hydraulic pump, and a control panel for each work unit 300 and executes the manufacturing process while rotating these together with the rotary table 11 is assumed. In such an apparatus, the number of parts is increased, and the physique must be increased in size in order to ensure rigidity that can withstand the increasing weight of the rotating part. Furthermore, since the moment increases, it is disadvantageous for high-speed rotation.

  On the other hand, in the rotary compression molding machine 10 of the present embodiment, the number of drive motors 17 that are drive sources and the control panels associated therewith can be reduced. In addition, since the weight of the rotating part is reduced, the required rigidity can be reduced, and the physique of the apparatus can be reduced in size. Furthermore, since the moment can be reduced, it is advantageous for speeding up the rotation (for example, several seconds / one rotation), leading to a reduction in manufacturing cycle time.

  Further, the upper operation unit 20 and the lower operation unit 25 are forcibly driven in both directions in the rotation axis direction following the shapes of the upper cam rail 13 and the lower cam rail 14. Therefore, since the movement in one direction does not depend on the gravity of the operating unit itself, the operating unit can be reliably operated even when a foreign object is caught in the sliding portion.

(Other embodiments)
(A) In the rotary compression molding machine of the above-described embodiment, the configuration of parts other than the gist of the present invention may be changed as appropriate based on ordinary knowledge of those skilled in the art. For example, the rotational direction of the rotary table 11, the number of sets of the work unit 300, the upper operation unit 20 and the lower operation unit 25, the support structure of the upper cam rail 13 and the lower cam rail 14 and the like are not limited to the configuration exemplified in the above embodiment.

  (A) In the above embodiment, the cam rail and the operation unit are provided above and below the work unit 300. On the other hand, it is good also as a structure by which a cam rail and an action | operation unit are provided only in one side of the rotating shaft direction of the work unit 300. FIG. For example, in the case of an apparatus that does not include the step of compressing the rubber mold with the pressure oil L (the third and fourth steps) and pressurizes the material only with the load from the upper mold 23, the lower cam rail 14 of the above embodiment is abolished, Only the upper cam rail 13 can be used.

  (C) In FIG. 2, the cam rail shape between adjacent stages is inclined substantially linearly. On the other hand, for example, the speed of pressurization can be adjusted by finely changing the inclination of the lower cam rail 14 between the stages S2 and S3 corresponding to the pressurization process.

  (D) The molding target material of the rotary compression molding machine is not limited to a powder material, and may be a fluid such as a molten resin. In addition to the compression molding machine, the rotary manufacturing apparatus of the present invention can be applied to any manufacturing apparatus provided with a drive mechanism that moves the working means in a direction parallel to the rotation axis with respect to the work unit. For example, a press machine, an assembly machine or press-fitting machine that assembles parts in order from the top to bottom with respect to the work held by the receiving jig, or food that mixes and sprays other liquids in order to the liquid injected into the container It can also be applied to manufacturing apparatuses for chemicals and chemicals.

Further, depending on the shape and physical properties of the workpiece, the present invention can be applied not only to a vertical machine whose rotation axis direction is vertical, but also to a horizontal machine whose rotation axis direction is horizontal. In the horizontal type machine, the configuration and operation of the vertical type machine are described by replacing “upper / lower” with “front / rear” and “elevating” with “forward / backward”, for example. Can be used.
As mentioned above, this invention is not limited to such embodiment, In the range which does not deviate from the meaning of invention, it can implement with a various form.

10: Rotary compression molding machine (rotary manufacturing equipment),
11 ... Rotary table,
13 ... upper cam rail, 14 ... lower cam rail,
17 ... Drive motor (rotary drive source),
20... Upper operation unit (action means),
25 ... Lower operation unit (action means),
300 ... work unit,
30 ・ ・ ・ Molding mold,
50 ... Cylinder part, 55 ... Piston,
C: cavity, M: powder material.

Claims (5)

A rotary table (11);
A rotational drive source (17) for generating a driving force for rotating the rotary table;
A plurality of work units (300) disposed on a circumference centering on a rotation axis of the rotary table and rotating together with the rotary table;
Cam rails (13, 14) that are circumferentially provided in at least one of the plurality of work units in the direction of the rotation axis and are formed so that the position in the direction of the rotation axis changes according to the position in the circumferential direction;
A plurality of work units are provided corresponding to each work unit, move in the direction of the rotation axis following the shape of the cam rail while rotating together with the rotary table, and periodically approach or separate from the corresponding work units. Action means (20, 25);
With
The work unit is formed with an oil chamber (38) through which an oil introduction port (39) for introducing pressure oil from the outside communicates, and the pressure is finely adjusted by adjusting the amount of oil introduced into the oil introduction port. Has been
A rotary manufacturing apparatus (10) characterized in that a product is manufactured by the operation of the action means for the work unit and the volume change of the oil chamber . 2. The rotary manufacturing apparatus according to claim 1, wherein the pressure in the oil chamber is finely adjusted by an oil amount adjusting screw provided upstream of the oil introduction port. Said cam rail and said plurality of working means, said the plurality of work units, rotary manufacturing apparatus according to claim 1 or 2, characterized in that provided on one and the other of the rotation axis direction. The plurality of work units and the plurality of action means are provided in a number corresponding to a series of manufacturing steps, and the series of manufacturing steps are executed while the rotary table rotates once. The rotary manufacturing apparatus as described in any one of Claims 1-3. The rotary manufacturing apparatus according to any one of claims 1 to 4 , wherein the rotary manufacturing apparatus compresses a fluid or powder material (M).
The work unit is:
Cavity (C) Yes molding die that is the oil chamber forming the material is filled (30), and a piston to the material pressure compressing in the cavity by changing the volume of the oil chamber (55 ) Including a cylinder portion (50) for reciprocally moving the rotary compression molding machine.

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