TWI454362B - The material supply device of the forming machine - Google Patents

Description

Material supply device for forming machine

The present invention relates to a material supply device, and more particularly to a material supply device that supplies a molding material such as a granular resin to a heating cylinder of an injection molding machine.

In the heating cylinder of the injection molding machine, a funnel for supplying a granular molding material (resin pellets or the like) is provided. The resin pellets accumulated in the funnel are supplied to a space formed by the fins of the screw formed in the heating cylinder, and are conveyed to the front of the heating cylinder by the rotation of the screw.

Usually, the resin pellets accumulated in the funnel are supplied into the heating cylinder through a material supply hole formed in the heating cylinder. The material supply hole extends in the vertical direction and communicates from the outlet of the funnel to the screw in the heating cylinder. The resin pellets supplied into the funnel are filled with a gravity filling material supply hole and filled into a space formed by the fins of the screw. Therefore, between the space formed by the funnel and the fin of the screw, the resin pellet is formed into a tightly packed state by gravity.

In the method of supplying the resin pellets as described above, the amount of the resin pellets supplied into the heating cylinder is determined by gravity by the amount of space formed by the fins filled in the screw, and the supply amount of the resin pellets cannot be adjusted.

Here, a material supply device capable of controlling the supply amount of the resin pellets supplied into the heating cylinder has been proposed (for example, refer to Patent Document 1). In the material supply device, the resin pellets in the funnel are temporarily supplied to the supply cylinder, and the feed screw rotating in the supply cylinder is quantitatively continuously moved at a predetermined speed, and is supplied from the front end of the supply cylinder. To the material supply hole of the heating cylinder. In the material supply hole of the heating cylinder, the resin pellets are not tightly packed. In other words, the resin pellets supplied from the supply screw are not retained in the material supply hole, are dropped into the heating cylinder in the original state, and are directly sent to the front of the heating cylinder by the screw in the heating cylinder.

Patent Document 1: JP-A-2003-300211

In the material supply device disclosed in Patent Document 1, when the type of the supplied resin is changed and the maintenance work is performed, it is necessary to discharge the resin pellets in the supply cylinder. Usually, in order to discharge the resin pellets remaining in the supply cylinder, the supply screw is rotated to discharge the resin pellets from the delivery port. At this time, since the resin pellets sent out from the delivery port enter the heating cylinder of the injection molding machine, it is necessary to operate the heating cylinder to discharge the discharged resin pellets from the heating cylinder.

Further, in order to discharge the resin in the supply cylinder, the supply screw may be removed from the supply cylinder. Usually, on the rear side of the supply cylinder, a drive mechanism for rotating the supply cylinder is provided. The driving source of the driving mechanism uses, for example, a relatively heavy electric motor. Therefore, before the supply screw is removed from the supply cylinder, the operation of removing the heavier drive mechanism from the supply cylinder must be performed.

In view of the above, it is an object of the present invention to provide a material supply device for a molding machine that can perform maintenance work quickly and efficiently.

In order to achieve the above object, the present invention provides a material supply device for a molding machine, the material supply device of the molding machine comprising: a supply cylinder having a supply screw for feeding a resin inside, and having a supply port for supplying a molding material and a delivery port for the supplied molding material; a discharge hole provided between the delivery port of the supply cylinder and the supply port for discharging the molding material in the supply cylinder; and a cover member Live the drain hole.

In the material supply device of the molding machine described above, the supply screw is reversed to return the molding material in the supply cylinder to the rear. Further, it further includes a shutoff mechanism that blocks the molding material in front of the supply port of the supply cylinder. Further, the discharge hole is provided in the vicinity of the delivery port of the supply cylinder. Alternatively, the discharge hole may be provided below the supply port of the supply cylinder. Further, the discharge hole may be provided in the vicinity of the delivery port of the supply cylinder and below the supply port of the supply cylinder. Further, the supply cylinder may tilt the delivery port toward the upper side.

Moreover, the present invention provides a material supply device for a molding machine of another form, the material supply device of the molding machine comprising: a supply cylinder having a supply screw for conveying resin therein; and a feed screw drive mechanism mounted to the In the supply cylinder, the supply screw drive mechanism is detached from the supply cylinder in a state of being mounted on the supply cylinder.

In the material supply device of the molding machine, the supply screw drive mechanism includes a drive source and a rotation transmission mechanism that transmits power of the drive source to the supply screw, and the drive source is fixed to an axis from the supply screw Separated location. Further, the feed screw drive mechanism is disposed in the axial direction of the supply cylinder and movably supported at a position separated from the axial direction of the feed screw.

Alternatively, the feed screw system can be removed from the supply cylinder together with a part of the feed screw drive mechanism. The feed screw drive mechanism has a motor having a hollow stator and a rotating portion that rotates within the stator, the rotating portion being fixed to the feed screw. The feed screw drive mechanism includes a rotation detector that detects a rotation speed of the motor, and the rotation detector has a hollow structure, and the rotation portion penetrates the inside. The rotation detector has a core portion that causes the rotation detector to core the stator.

According to the invention, the molding material retained in the supply cylinder can be discharged from the discharge hole to the outside by opening the cover member provided in the discharge hole of the supply screw. Therefore, work and maintenance work at the time of changing the molding material can be performed easily, efficiently, and quickly.

Further, according to the present invention, when the screw is detached from the supply cylinder, it is not necessary to detach the drive mechanism of the screw from the supply cylinder, and even a single worker can easily remove the screw from the supply cylinder. Therefore, the maintenance work of the material supply device can be performed easily, efficiently, and quickly.

First, a material supply device that can be applied to the injection molding machine of the present invention will be described with reference to Fig. 1 . Fig. 1 is a cross-sectional view showing an injection device to which a resin supply device applied to a material supply device of the present invention is attached.

In the first drawing, the resin supply device 10 is attached to the injection device 100 in order to supply resin pellets to the heating cylinder 102 of the injection device 100.

The injection molding machine has a mold device (not shown), a mold clamping device (not shown), and the above-described injection device 100. The mold device has a fixed mold and a movable mold. The mold clamping device includes a fixed pressure plate on which a fixed mold is attached, and a movable pressure plate on which a movable mold is attached, and the mold clamping cylinder advances and stops the movable pressure plate to perform mold closing, mold clamping, and mold opening.

The injection device 100 includes a heating cylinder 102, an injection port 104 attached to the tip end of the heating cylinder 102, a screw 106 that is rotatable and retractable in the heating cylinder 102, and heaters h1 to h3 attached to the outer circumference of the heating cylinder 102, and are disposed. A drive unit 108 (not shown) behind the heating cylinder 102.

The screw 106 has a spiral fin 110 that protrudes from the outer peripheral surface of the rod-shaped main body portion, and forms a spiral groove 112 along the fin 110. A pressure member 114 is attached to the front end of the screw 106, and a backflow prevention device 116 is attached to the front side thereof.

The drive device 108 includes a metering motor as a driving unit for metering and an injection motor as a driving unit for emitting.

At a predetermined position in the vicinity of the rear end of the heating cylinder 102, a resin supply hole 102a as a material supply hole is formed. The resin supply hole 102a is formed at a position facing the rear end portion of the groove 112 in a state where the screw 106 is located at the forward limit position in the heating cylinder 102. Then, the resin supply device 10 is attached to a portion where the resin supply hole 102a is formed.

The resin supply device 10 has a funnel 12 that houses a housing portion of a resin pellet as a molding material. The resin pellets accommodated in the funnel 12 are sent to the resin supply hole 102a via the input portion 14, and are supplied from the resin supply hole 102a into the heating cylinder 102.

The input unit 14 has a supply cylinder 16 that is disposed at a predetermined angle from the horizontal direction, and a cylindrical guide portion 18 that extends from the front end of the supply cylinder 16 to the lower side. The feed screw 20 is rotatably disposed within the supply cylinder 16. A supply motor 22 as a drive mechanism for rotating the supply screw 20 is provided at the rear end portion of the supply cylinder 16. The rear end of the supply cylinder 16 is connected to the funnel 12, and the front end is fixed to the guide portion 18.

When the supply motor 22 is driven to rotate the supply screw 20, the resin pellets in the funnel 12 are supplied into the supply cylinder 16 and advanced along the grooves formed on the outer circumferential surface of the supply screw 20. The resin pellets are transported from the front end of the feed screw 20 into the guide portion 18, and are dropped into the guide portion 18 to be supplied into the heating cylinder 102. At this time, each of the resin pellets is arranged in a row and falls on the guide portion 18, and is supplied into the heating cylinder 102 through the resin supply hole 102a.

The resin pellets supplied into the heating cylinder 102 are heated and melted by the heaters h1 to h3 while advancing along the grooves 112. The molten resin is delivered to the front of the screw 106. In a state where the screw 106 is located at the retreat limit position in the heating cylinder 17, a molten resin having a single injection amount is accumulated in front of the backflow prevention device 116. After the molten resin is accumulated in front of the backflow prevention device 116, the injection motor is driven to advance the screw 106. Thereby, the resin accumulated in front of the backflow prevention device 116 is emitted from the injection port 104, and is filled in the mold space of the mold device.

In addition, the injection motor of the injection molding machine drive driving device 108, the metering motor, the supply motor 22 of the resin supply device 10, and the like are controlled, and the control unit 200 is provided to supply current to the heaters h1 to h3. The control unit 200 includes a display unit, an operation unit, and the like in addition to a CPU as a calculation device and a memory as a recording device, and performs various calculations based on a predetermined program, data, and the like as a function of a computer.

Next, a resin supply device as a material supply device according to a first embodiment of the present invention will be described with reference to FIG. Fig. 2 is a cross-sectional view showing a resin supply device according to a first embodiment of the present invention. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and their description is omitted.

The resin supply device in the first embodiment of the present invention has a supply cylinder 16A, a guide portion 18A connected to the front end of the supply cylinder 16A, and a funnel 12 attached to the rear end of the supply cylinder 16A. In the present embodiment, the supply cylinder 16A and the guide portion 18A are integrated, and the individual components may be connected to each other after fabrication.

Inside the supply cylinder 16A, a supply screw 20A is rotatably provided. A supply motor 30 is attached to the rear end portion of the supply cylinder 16A as a supply screw drive mechanism for driving the supply screw 20A. The supply motor 30 is provided to drive the supply screw 20A in the same manner as the supply motor 22 shown in Fig. 1. The rotary portion motor shaft 32 that serves as the feed motor 30 is integrally formed with the feed screw 20A.

Here, the configuration of the feed motor 30 will be described. The feed motor 30 has a stator 34 as a fixed portion and a rotor 36 as a rotating portion. An electromagnet is formed on the stator 34, and a permanent magnet is formed on the rotor 36. The rotor 36 has a hollow structure having a through hole at the center, and the motor shaft 32 is inserted into the through hole.

A rotor encoder 38 that detects the rotational speed of the rotor 36 is attached to the rear of the feed motor 30. The rotor encoder 38 has a rotor 40 on which a ruler is formed and a reading portion 42 that reads the ruler. The rotor 40 is fixed to the rotor 36 by bolts and rotates together with the rotor 36. The reading unit 42 is fixed to the rear motor plate 44 of the support stator 34.

The rotor 40 of the rotor encoder 38 has a hollow structure having the same through hole as the rotor 36, and the motor shaft 32 is inserted into the through hole of the rotor 36 and the through hole of the rotor 40. The motor shaft 32 is fixed to the rotor 40 by bolts. Therefore, the motor shaft 32 and the rotor 40 and the rotor 36 are fixed to each other to form an integral rotating portion. The motor shaft 32 also rotates by the rotation of the rotor 36. In the present embodiment, the portion on the front side of the motor shaft 32 forms the feed screw 20A, and the feed screw 20A is rotated by the rotation of the motor shaft 32.

Further, in a state in which the rotor 40 is fitted to the rotor 36, the rotation axis of the rotor 40 coincides with the rotation axis of the rotor 36. Further, in a state in which the motor shaft 32 is fitted to the rotor 40, the rotation axis of the motor shaft 32 coincides with the rotation axis of the rotor 36. Therefore, the rotor 40 is fixed to the rotor 36 and fixed by being attached to the rotor 40 by the motor shaft 32. The rotation shaft of the rotor 36, that is, the rotation of the motor shaft 32 corresponding to the rotation shaft of the motor 30. The axes are consistent.

The rotor 36 is rotatably attached to the front side motor plate 46 and the rear side motor plate 44 of the support stator 34 by bearings on the front side and the rear side. The front side motor plate 46 is fixed to the flange plate 48. The flange plate 48 has a central through hole, and the motor shaft 32 is inserted into the through hole, and the feed screw 20A protrudes forward of the feed motor 30.

The flange plate 48 is fixed to the flange portion 16Aa of the supply cylinder 16A with a clamp or the like, whereby the feed motor 30 is fixed to the supply cylinder 16A. The fitting portion is provided on the flange plate 48 and the flange portion 16Aa. When the flange plate 48 is attached to the flange portion 16Aa, the rotation shaft of the feed motor 30 (that is, the rotation shaft of the supply screw 20A) and The center axes of the supply cylinders 16A are identical. Further, a sealing member 48a such as an oil seal is provided between the motor shaft 32 and the flange plate 48, and the resin pellet powder is sealed from the supply cylinder 16A so as not to enter the inside of the supply motor 30.

In Fig. 2, the resin pellets accommodated in the funnel 12 are supplied into the supply cylinder 16A through the supply port 16Ab. The resin supplied into the supply cylinder 16A moves in accordance with the rotation of the supply screw 20A, and is supplied from the delivery port 17 at the tip end of the supply cylinder 16A to the inside of the guide portion 18A. The guide portion 18A communicates with the material supply hole 102a of the heating cylinder 102, and the resin pellet dropped into the guide portion 18A is supplied to the heating cylinder 102 through the material supply hole 102a.

In the present embodiment, the partition valve 50 is provided between the hopper 12 and the supply port 16Ab of the supply cylinder 16A as a shutoff mechanism for cutting the resin pellets from the hopper 12 to the supply cylinder 16A. The resin passage between the funnel 12 and the supply port 16Ab of the supply cylinder 16A is opened by pulling the handle 50a of the partition valve 50, and the resin pellets in the funnel 12 are supplied to the supply cylinder 16A. By pushing the handle 50a of the partition valve 50, the resin passage between the funnel 12 and the supply port 16Ab of the supply cylinder 16A (as shown in Fig. 2) is closed, and the resin pellets are cut from the funnel 12 to the feed. Supply of the cylinder 16A.

Further, in the present embodiment, the discharge hole 16Ac is provided below the supply port 16Ab of the supply cylinder 16A. The discharge hole 16Ac is formed to penetrate the wall portion of the supply cylinder 16A, and is a through hole of a size in which the resin pellets in the supply cylinder 16A can be discharged. Further, the cover member 52 for closing the discharge hole 16Ac is attached to the supply cylinder 16A to cover the discharge hole 16Ac. The cover member 52 can be attached to the supply cylinder 16A by, for example, a bolt.

Further, in the present embodiment, the feed motor 30 as the feed screw drive mechanism is a motor that can be rotated in the forward and reverse directions.

Further, in the case where the supply screw 20A extends rearward of the lower side of the supply port 16Ab, the discharge hole 16Ac is preferably provided directly below the end of the supply screw or near the lowermost end of the supply cylinder 16A.

In the resin supply device having the above configuration, for example, a case where the resin pellets in the funnel 12 are replaced with different resin pellets is considered. First, since the partition valve 50 is closed, the cover member 52 is moved to open the discharge hole 16Ac. Thereby, the resin pellet in the vicinity of the discharge hole 16Ac is discharged to the outside of the supply cylinder 16A via the discharge hole 16Ac.

Then, the supply motor 30 is reversed, and the resin pellets that have accumulated on the discharge port 17 side from the discharge hole 16Ac move toward one side of the discharge hole 16Ac, and are discharged to the outside of the supply cylinder 16A via the discharge hole 16Ac.

After the resin pellets retained in the supply cylinder 16A are discharged, the reverse rotation of the supply motor 30 is stopped, and the discharge hole 16Ac is covered by the cover member 52 to close the discharge hole 16Ac. Then, the partition valve 50 is opened, new resin pellets are supplied to the funnel 12, and new resin pellets are supplied to the supply cylinder 16A.

As described above, according to the present embodiment, the partition valve 50 is closed to open the cover member 52, and by reversing the feed motor 30, the resin pellets remaining in the supply cylinder 16A are discharged outside the supply cylinder 16A. Therefore, the resin pellets retained in the supply cylinder 16A are not sent out from the delivery port 17 and are supplied into the heating cylinder 102. According to the present embodiment, the resin pellets retained in the supply cylinder 16A can be discharged to the outside of the supply cylinder 16A easily and quickly. Further, the discharge hole 16Ac is a discharge hole provided at the lowermost portion of the supply cylinder 16A, and is provided in a portion where the resin is hard to be discharged, so that the resin pellet and the resin powder in the supply cylinder 16A can be completely discharged.

Next, the resin supply device of the material supply device according to the second embodiment of the present invention will be described with reference to FIG. Fig. 3 is a cross-sectional view showing a resin supply device according to a second embodiment of the present invention. In the third embodiment, the same elements as those shown in FIG. 2 are given the symbols of the phase diagram, and the description thereof is omitted.

In the present embodiment, the discharge hole 16Ad is provided in the vicinity of the delivery port 17 of the supply cylinder 16A instead of the discharge hole 16Ac shown in Fig. 2 . The discharge hole 16Ad is formed through the wall portion of the supply cylinder 16A, and is a through hole in which the resin pellets in the supply cylinder 16A can be discharged. Moreover, the cover member 54 for opening and closing the discharge hole 16Ad is attached to the supply cylinder 16A and covers the discharge hole 16Ad. The cover member 54 is detachably mounted to the supply cylinder 16A by bolts. The position at which the discharge hole 16Ad is provided is preferably close to the delivery port 17.

In the resin supply device having the above configuration, for example, a case where the resin pellets in the funnel 12 are replaced with different resin pellets is considered. First, since the partition valve 50 is closed, the cover member 54 is moved to open the discharge hole 16Ad. Thereby, the resin pellet in the vicinity of the discharge hole 16Ad is discharged to the outside of the supply cylinder 16A via the discharge hole 16Ad.

Then, the supply motor 30 is rotated forward, and the resin pellets remaining between the supply port 16Ab and the delivery port 17 are moved toward the discharge hole 16Ad, and are discharged to the outside of the supply cylinder 16A via the discharge hole 16Ad.

After the resin pellets retained in the supply cylinder 16A are discharged, the normal rotation of the feed motor 30 is stopped, and the discharge holes 16Ad are covered by the cover member 54 to close the discharge holes 16Ad. Then, the partition valve 50 is opened, and by feeding new resin pellets to the funnel 12, new resin pellets are supplied to the supply cylinder 16A.

As described above, according to the present embodiment, the partition valve 50 is closed to open the cover member 54, and the resin pellets retained in the supply cylinder 16A are discharged from the supply cylinder 16A by the forward rotation of the supply motor 30. Therefore, the resin pellets retained in the supply cylinder 16A are not sent out from the delivery port 17 and are supplied into the heating cylinder 102. According to the present embodiment, the resin pellets retained in the supply cylinder 16A can be discharged to the outside of the supply cylinder 16A easily and quickly.

Further, in the present embodiment, the discharge hole 16Ad in the vicinity of the delivery port 17 is provided only in the supply cylinder 16A, but the discharge hole 16Ac in the above-described first embodiment may be provided at the same time.

Next, a material supply device of a molding machine according to a third embodiment of the present invention will be described with reference to Fig. 4. Fig. 4 is a cross-sectional view showing a resin supply device of a material supply device according to a third embodiment of the present invention. In the fourth embodiment, the same components as those in the second embodiment are denoted by the same reference numerals, and their description will be omitted.

A resin supply device according to a third embodiment of the present invention has a supply cylinder 16A, a guide portion 18A to which the front end of the supply cylinder 16A is connected, and a funnel 12 attached to the rear end of the supply cylinder 16A. In the present embodiment, although the supply cylinder 16A is integrally formed with the guide portion 18A, it may be made of individual members and then connected to each other.

Inside the supply cylinder 16A, a supply screw 20A is rotatably provided. At the rear end portion of the supply cylinder 16A, a supply motor 30 is mounted as a supply screw drive mechanism for driving the supply screw 20A. The feed motor 30 is the same as the feed motor 22 shown in Fig. 1 and is used to drive the feed screw 20A. The motor shaft 32 which becomes the rotating part of the supply motor 30 is integrally formed with the supply screw 20A. Therefore, by removing the motor shaft 32 from the supply motor 30, the supply screw 20A can be removed from the supply cylinder 16A together.

Here, the configuration of the feed motor 30 will be described. The feed motor 30 has a stator 34 as a fixed portion and a rotor 36 as a rotating portion. An electromagnet is formed on the stator 34, and a permanent magnet is formed on the rotor 36. The rotor 36 has a hollow structure having a through hole at the center, and the motor shaft 32 is inserted into the through hole.

A rotor encoder 38 that detects the rotational speed of the rotor 36 is attached to the rear of the feed motor 30. The rotor encoder 38 has a rotor 40 on which a ruler is formed and a reading portion 42 that reads the ruler. The rotor 40 is fixed to the rotor 36 by bolts and rotates together with the rotor 36. The reading unit 42 is fixed to the rear motor plate 44 of the support stator 34.

The rotor 40 of the rotor encoder 38 has a hollow structure having the same through hole as the rotor 36, and the motor shaft 32 is inserted into the through hole of the rotor 36 and the through hole of the rotor 40. The motor shaft 32 is fixed to the rotor 40 by bolts. Therefore, the motor shaft 32 and the rotor 40 and the rotor 36 are fixed to each other to form an integral rotating portion. The motor shaft 32 also rotates by the rotation of the rotor 36. In the present embodiment, the portion on the front side of the motor shaft 32 forms the feed screw 20A, and the feed screw 20A is rotated by the rotation of the motor shaft 32.

Further, in a state in which the rotor 40 is fitted to the rotor 36, the rotation axis of the rotor 40 coincides with the rotation axis of the rotor 36. Further, in a state in which the motor shaft 32 is fitted to the rotor 40, the rotation axis of the motor shaft 32 coincides with the rotation axis of the rotor 36. Therefore, the rotor 40 is fixed to the rotor 36 and fixed by the motor shaft 32 attached to the rotor 40. The rotation shaft of the rotor 36, that is, the rotation shaft of the motor 30 and the motor shaft 32 The axis of rotation is the same.

The rotor 36 is rotatably attached to the front side motor plate 46 and the rear side motor plate 44 of the support stator 34 by bearings on the front side and the rear side. The front side motor plate 46 is fixed to the flange plate 48. The flange plate 48 has a central through hole, and the motor shaft 32 is inserted into the through hole, and the feed screw 20A protrudes forward of the feed motor 30.

The flange plate 48 is fixed to the flange portion 16Aa of the supply cylinder 16A with a clamp or the like, whereby the feed motor 30 is fixed to the supply cylinder 16A. The fitting portion is provided on the flange plate 48 and the flange portion 16Aa. When the flange plate 48 is attached to the flange portion 16Aa, the rotation shaft of the feed motor 30 (that is, the rotation shaft of the supply screw 20A) and The center axes of the supply cylinders 16A are identical. Further, a sealing member 48a such as an oil seal is provided between the motor shaft 32 and the flange plate 48, and the resin pellet powder is sealed from the supply cylinder 16A so as not to enter the inside of the supply motor 30.

Moreover, in the present embodiment, the diameter of the portion of the flange plate 48 that penetrates the motor shaft 32 (i.e., the portion sealed by the sealing member) is larger than the diameter of the supply screw 20A. Further, the diameter of the portion extending in the rotor 36 of the motor shaft 32 is larger than the diameter of the portion penetrating the flange plate 48 (i.e., the portion sealed with the sealing member). The supply screw 20A does not interfere with the sealing member 48a, and the motor shaft 32 is pulled out from the rear side of the supply motor 30.

According to the supply motor 30 of the above configuration, the supply motor 30 (i.e., the fixed portion where the stator 34 is provided) in a state in which the motor shaft 32 of the supply screw 20A is removed is attached to the supply cylinder 16A. After the supply motor 30 is mounted, the motor shaft 32 forming the supply screw 20A is inserted into the through hole of the rotor 40 and the through hole of the rotor 36 from the rear of the supply motor 30, by fixing the motor shaft 32 to the rotation. In a state where the rotation axis of the supply screw 20A coincides with the central axis of the supply cylinder 16A, the supply screw 20A protrudes in front of the supply motor 30 and is disposed in the supply cylinder 16A.

Therefore, when the supply screw 20A is pulled out from the supply cylinder 16A, the motor shaft 32 is removed from the rotor 40 and moved to the rear. The feed screw 20A is integrally formed with the motor shaft 32. By removing the motor shaft 32, the feed screw 20A is also removed to the rear of the feed motor 30 through the through hole inside the rotor 36.

As described above, according to the present embodiment, in the case of the maintenance work, when the supply screw 20A has to be pulled out from the supply cylinder 16A, it is not necessary to remove the entire supply motor 30 from the supply cylinder 16A, and the motor shaft is released. The fixing of 32 is performed to pull the motor shaft 32 to the rear, and the supply screw 20A is detached from the supply cylinder 16A. Therefore, it is not necessary to remove the weight supply motor 30, and it is possible to easily carry out the supply screw 20A by one operator, and the maintenance work can be performed efficiently.

Further, when the supply screw 20A is assembled to the supply cylinder 16A after the completion of the maintenance operation, the front end of the motor shaft 32, that is, the supply screw 20A is inserted into the inside of the supply motor 30, and is inserted into the interior in this state, and The motor shaft 32 is inserted into the through hole of the rotor 36, and the motor shaft 32 is fixed to the rotor 40. By this assembly work, the rotation shaft of the supply screw 20A can be engaged with the center axis of the supply cylinder 16A, and the rotation shaft of the motor shaft 32 can also be engaged with the rotation shaft of the supply motor 30.

As described above, according to the present embodiment, the dismounting and mounting of the supply screw 20A can be easily performed, and the maintenance work can be performed easily, quickly, and efficiently.

Next, a material supply device of a molding machine according to a fourth embodiment of the present invention will be described with reference to Fig. 5. Fig. 5 is a cross-sectional view showing a resin supply device as a material supply device according to a fourth embodiment of the present invention. In the fifth embodiment, the same components as those shown in FIG. 2 are denoted by the same reference numerals, and their description is omitted.

In the present embodiment, since the feed screw is directly rotated instead of being attached to the motor shaft, it is attached to the rotation transmission mechanism and rotated via the rotation transmission mechanism. In the present embodiment, the rotation transmitting mechanism is constituted by a pair of pulleys and a belt that is engaged with the pair of pulleys.

As shown in Fig. 5, the feed screw drive mechanism that drives the feed screw 20A has a pair of pulleys 60A, 60B, a belt 62 that is engaged with the pulleys 60A, 60B, and a feed motor 64 that drives the pulley 60B. The pulley 60A is rotatably supported by a bearing in a casing formed by the flange plate 66 and the motor support 68. The flange plate 66 is attached to the supply cylinder 16A, and the entire drive mechanism can be mounted on the supply cylinder 16A.

The pulley 60A is rotatably supported by a bearing between the flange plate 66 and the motor support 68. The pulley 60A has a hollow structure having a through hole at the center, and the pulley shaft 70 serving as a rotation transmission member is inserted into the through hole. On the front side of the pulley shaft 70, a supply screw 20A is formed. The supply screw 20A is integrally formed with a pulley shaft 70 that serves as a rotating shaft of the pulley 60A. Therefore, the supply screw 20A can be detached from the supply cylinder 16A by removing the pulley shaft 70 from the pulley 60A. By fitting the pulley shaft 70 to the through hole of the pulley 60A, the rotation shaft of the pulley shaft 70 is fitted to the rotation shaft of the pulley 60A. Further, since the flange plate 66 is fitted to the flange portion 16Aa of the supply cylinder 16A to be positioned, the rotation shaft of the supply screw 20A that protrudes from the flange plate 66 can be engaged with the central axis of the supply cylinder 16A.

The feed motor 64 has its rotational axis located at a position offset from the rotational axis of the pulley 60A (i.e., the rotational axis of the pulley shaft 70) in parallel, and is attached to the motor support 68. The pulley 60B is fixed to the motor shaft 72 of the feed motor 64. When the supply motor 64 is driven and the pulley 60B is rotated, the rotational force is transmitted to the pulley 60A via the belt 62, and as a result, the supply screw 20A rotates together with the pulley shaft 70.

The permanent magnet is provided on the motor shaft 72 to constitute a rotor of the feed motor 64. A stator 74 having an electromagnet is disposed around the motor shaft 72. The stator 74 is supported and fixed by the front side motor board 76 and the rear side motor board 78. The motor shaft 72 that becomes the rotor is rotatably supported by the front side motor board 76 and the rear side motor board 78 via bearings.

The rear of the feed motor 64 is closed by the encoder plate 80. The rear end portion of the motor shaft 72 extends from the encoder plate 80 and is coupled to the rotor encoder 82. The rotor encoder 82 is a rotation detector that detects the rotational speed of the motor shaft 72.

Moreover, the portion in which the belt 62 is disposed is covered by the belt cover 84. Further, the through hole provided in the motor support body 68 is closed by the lid body 86 behind the pulley shaft 70.

Further, in the present embodiment, the diameter of the sealing portion in the sealing member 48a of the pulley shaft 70 is larger than the diameter of the supply screw 20A. Further, the diameter of the sealing portion of the sealing member 48a of the pulley shaft 70 is smaller than the inner diameter of the through hole of the pulley 60A. Thereby, the supply screw 20A does not interfere with the sealing member 48a, and the pulley shaft 70 is easily pulled out from the rear side of the pulley 60A.

According to the drive mechanism of the above configuration, the drive mechanism (i.e., the pulleys 60A, 60B and the feed motor 64) in a state in which the pulley shaft 70 of the supply screw 20A is removed can be attached to the supply cylinder 16A. After the driving mechanism is attached, the pulley shaft 70 in which the supply screw 20A is formed is inserted into the through hole of the pulley 60A from the rear of the pulley 60A, and the pulley shaft 70 is fixed to the pulley 60A, and the rotation shaft of the supply screw 20A is supplied. In a state where the center axes of the cylinders 16A are aligned, the feed screw 20A protrudes in front of the flange plate 66 and is disposed in the supply cylinder 16A.

Therefore, when the supply screw 20A is detached from the supply cylinder 16A, the pulley shaft 70 can be removed from the pulley 60A and detached to the rear. The feed screw 20A is integrally formed with the pulley shaft 70. By removing the pulley shaft 70, the supply screw 20A is also detached to the rear of the pulley 60A through the through hole inside the pulley 60A. Since the supply motor 64 is disposed at a position shifted from the rotation axis of the pulley shaft 70, it is not necessary to remove the supply motor 64 when the supply screw 20A is detached from the supply cylinder 16A.

As described above, according to the present embodiment, in the case of the maintenance work, in the case where the supply screw 20A must be detached from the supply cylinder 16A, it is not necessary to detach the supply motor 64 from the supply cylinder 16A by releasing the slip. When the axle 70 is fixed and the pulley shaft 70 is detached to the rear, the supply screw 20A can be detached from the supply cylinder 16A. Therefore, it is not necessary to disassemble the supply motor 64 having a weight, and even a single worker can easily detach the supply screw 20A, and the maintenance work can be performed efficiently.

Further, after the maintenance work is completed, when the supply screw 20A is assembled to the supply cylinder 16A, the tip end of the pulley shaft 70, that is, the feed screw 20A is inserted into the through hole of the pulley 60A, and is inserted into the inner portion in this state, and is slipped. The axle 70 is inserted into the through hole of the pulley 60A, and the pulley shaft 70 can be fixed to the pulley 60A. By this assembly work, the rotation shaft of the supply screw 20A can be aligned with the center shaft of the supply cylinder 16A, and the rotation shaft of the pulley shaft 70 can also be aligned with the rotation shaft of the pulley 60A.

As described above, according to the present embodiment, the dismounting and mounting of the supply screw 20A can be easily performed, and the maintenance work can be performed easily, quickly, and efficiently.

Next, a resin supply device as a material supply device according to a fifth embodiment of the present invention will be described with reference to Fig. 6. Fig. 6 is a cross-sectional view showing a resin supply device as a material supply device according to a fifth embodiment of the present invention. In the sixth embodiment, the same components as those in the second embodiment are denoted by the same reference numerals, and their description will be omitted.

In the resin supply device of the fifth embodiment of the present invention, the supply motor 90 is rotatably supported to the supply cylinder 16B. Then, the supply screw 20A and the motor shaft 32A are coupled to be separable from each other. When the supply screw 20A is detached, the supply screw 20A is disconnected from the motor shaft 32A and separated, and the feed motor 90 is rotated upward, and only the material screw 20A is detached from the supply cylinder 16B to the rear.

In order to realize the above configuration, the supply cylinder 16B is divided into the cylinder portion 16Ba on the supply screw side and the cylinder portion 16Bb on the supply motor side, and the cylinder portion 16Bb on the supply motor side is rotatably attached to the cylinder portion 16Ba by the pin 92. In the state where the motor shaft 32A is present, in order to rotate the cylinder portion 16Bb, the hole in which the cylinder portions 16Ba and 16Bb are coupled is viewed from the lateral direction, and the position from the rotation axis of the supply screw 20A is divided into the upper and lower states, and the cylinder portion 16Ba becomes The lower half portion is shaped to extend to the side of the feed motor.

The feed motor 20A is fixed to each other with respect to the motor shaft 32A by bolts 94. Further, an opening window (not shown) for a tool lock bolt 94 such as a wrench is provided on the cylinder portions 16Ba and 16Bb of the supply cylinder 16B.

The configuration of the feed motor 90 is the same as that of the feed motor 30 shown in Fig. 2, and the description thereof will be omitted.

According to the present embodiment, when the supply screw 20A is detached from the supply cylinder 16B, the bolt 94 is first loosened to release the coupling of the motor shaft 32A and the supply screw 20A, and the feed motor 90 is rotated upward. Thereby, a space is formed behind the supply screw 20A, and the supply screw 20A can be detached from the cylinder portion 16Ba of the supply cylinder 16B. When the eye bolt 96 is attached to the feed motor 90, the eye bolt 96 is pulled by the wire from above, and the feed motor 90 is raised while being rotated upward.

The cylinder portion 16Bb fixed to the supply motor 90 is pivotally supported by the cylinder portion 16Ba, and is not separated from the cylinder portion 16Ba, and the ascending supply motor 90 is lowered downward to automatically return to the original assembled position. Then, the feed screw 20A is coupled to the motor shaft 32A by the bolts 94, and the feed screw 20A is returned to the rotationally driven state.

The portion of the supply screw 20A that is coupled to the motor shaft 32A is coupled by a connecting flange as shown in Figs. 7 and 8. Fig. 7 is a plan view of the joint portion, and Fig. 8 is a cross-sectional view taken along line VI-VI. Planar portions 20Aa and 32Aa are formed on the supply screw 20A and the motor shaft 32A, respectively, and the flat portions 20Aa and 32Aa are sandwiched by the connecting flanges 98 from both sides, and are fixed by bolts 94, thereby connecting the supply screw 20A and the motor. Axis 32A.

As described above, according to the present embodiment, the supply screw 20A is easily detached from the supply cylinder 16B by the rotation of the supply motor 90 with respect to the supply cylinder 16B. Therefore, it is not necessary to disassemble the supply motor 64 having a weight, and even a single worker can easily detach the supply screw 20A, and the maintenance work can be performed efficiently.

Further, after the completion of the maintenance work, when the supply screw 20A is assembled to the supply cylinder 16B, the supply screw 20A is inserted into the supply cylinder 16B, and the feed motor 90 that rotates upward is returned to the original position, and the motor shaft 32A It can be coupled only to the supply screw 20A.

As described above, according to the present embodiment, the dismounting and mounting of the supply screw 20A can be easily performed, and the maintenance work can be performed easily, quickly, and efficiently.

The present invention is not limited to the specific disclosed embodiments, and various modifications and improvements can be made without departing from the scope of the invention.

The present invention is based on Japanese Patent Application No. 2007-194846, filed on Jul. 26, 2007, which is incorporated herein by reference. , drink all of its content.

Industrial utilization possibility

The present invention is applicable to a material supply device of a molding machine.

10. . . Resin supply device

12. . . funnel

14. . . Input department

16, 16A, 16B. . . Feed tank

16Aa. . . Flange

16Ab. . . Supply port

16Ac, 16d. . . Drain hole

16Ba, 16Bb. . . Cylinder

18. . . Guide

20, 20A. . . Feed screw

32, 32A, 62. . . Motor shaft

22, 30, 54, 80. . . Feed motor

34, 64. . . stator

36. . . Rotor

38, 72. . . Rotary encoder

40. . . Rotator

42. . . Reading unit

44, 68. . . Rear side motor board

46, 66. . . Front side motor board

48. . . Bursting plate

48a. . . Sealing member

50. . . Separation valve

50a. . . handle

52, 54. . . Cover member

60A, 60B. . . pulley

62. . . Belt

66. . . Bursting plate

68. . . Motor support

70. . . Pulley shaft

72. . . Motor shaft

80. . . Encoder board

84. . . Belt cover

86. . . cover

92. . . pin

94. . . bolt

96. . . Eyebolt

98. . . Connecting flange

100. . . Injection device

102. . . Heating cylinder

102a. . . Material supply hole

104. . . Shot exit

106. . . Screw

108. . . Drive unit

110. . . Wing

112. . . groove

200. . . Control department

Fig. 1 is a cross-sectional view showing an injection device to which an applicable material supply device of the present invention is attached.

Fig. 2 is a cross-sectional view showing a resin supply device according to a first embodiment of the present invention.

Fig. 3 is a cross-sectional view showing a resin supply device according to a second embodiment of the present invention.

Fig. 4 is a cross-sectional view showing a resin supply device according to a third embodiment of the present invention.

Fig. 5 is a cross-sectional view showing a resin supply device according to a fourth embodiment of the present invention.

Fig. 6 is a cross-sectional view showing a resin supply device according to a fifth embodiment of the present invention.

Figure 7 is a plan view showing a joint portion of a feed screw and a motor shaft.

Fig. 8 is a cross-sectional view taken along line VI-VI shown in Fig. 7.

12. . . funnel

16A. . . Feed tank

16Aa. . . Flange

16Ab. . . Supply port

16Ac. . . Drain hole

17. . . Send out

18A. . . Guide

20A. . . Feed screw

30. . . Feed motor

32. . . Motor shaft

34. . . stator

36. . . Rotor

38. . . Rotary encoder

40. . . Rotator

42. . . Reading unit

44. . . Rear side motor board

46. . . Front side motor board

48. . . Bursting plate

48a. . . Sealing member

50. . . Separation valve

50a. . . handle

52. . . Cover member

102. . . Heating cylinder

102a. . . Material supply hole

106. . . Screw

Claims (6)

A material supply device for a molding machine, comprising: a supply cylinder having a supply screw for conveying a forming material therein; and a supply screw driving mechanism mounted on the supply cylinder, wherein the supply screw driving mechanism is The supply screw is detached from the rear of the supply cylinder in a state of being attached to the supply cylinder. A material supply device for a molding machine, comprising: a supply cylinder having a supply screw for conveying a forming material therein; and a supply screw driving mechanism mounted on the supply cylinder, wherein the supply screw driving mechanism is The supply screw is detached from the supply cylinder in a state of being mounted in the supply cylinder; wherein the supply screw is detachable from the supply cylinder together with a part of the supply screw drive mechanism. The material supply device of the molding machine according to the first or second aspect of the invention, wherein the supply screw drive mechanism has a drive source and a rotation transmission mechanism that transmits power of the drive source to the feed screw, the drive source It is fixed at a position separated from the shaft of the above supply screw. The material supply device of the molding machine according to the first or second aspect of the invention, wherein the supply screw drive mechanism is disposed in an axial direction of the supply cylinder and movably supported by the shaft from the supply screw The position where the direction is separated. The material of the forming machine as described in claim 1 or 2 is for The feeding device, wherein the feed screw drive mechanism has a motor having a hollow stator and a rotating portion that rotates within the stator, the rotating portion being fixed to the feed screw. The material supply device for a molding machine according to claim 5, wherein the supply screw drive mechanism has a rotation detector that detects a rotation speed of the motor, and the rotation detector has a hollow structure, and the rotation portion penetrates the inside.