JP4704397B2 - Material feeder for molding machine - Google Patents

Description

  The present invention relates to a material supply apparatus, and more particularly to a material supply apparatus for supplying a granular molding material to a heating cylinder of an injection molding machine.

  The heating cylinder of the injection molding machine is provided with a hopper for supplying granular molding material (resin pellets or the like). The resin pellets accumulated in the hopper are supplied to the space defined by the flight formed in the screw in the heating cylinder, and sent to the front of the heating cylinder by the rotation of the screw.

  Usually, the resin pellets accumulated in the hopper are supplied into the heating cylinder through material supply holes formed in the heating cylinder. The material supply hole extends in the vertical direction and communicates from the outlet of the hopper to the screw in the heating cylinder. The resin pellets supplied into the hopper are filled into the material supply holes by gravity and filled into the space defined by the screw flight. Therefore, normally, resin pellets are densely filled by gravity between the hopper and the space defined by the flight of the screw.

  According to the resin pellet supply method as described above, the amount of resin pellets supplied into the heating cylinder is determined to be the amount filled by gravity into the space defined by the flight of the screw, and the amount of resin pellets supplied is It cannot be adjusted.

Therefore, a material supply device that can control the supply amount of resin pellets supplied into the heating cylinder has been proposed (see, for example, Patent Document 1). In this material supply device, the resin pellets in the hopper are once supplied to the feed cylinder, and the resin is continuously moved at a constant speed by a feed screw rotating in the feed cylinder, and the heating cylinder is started from the tip of the feed cylinder. To the material supply hole. The material supply hole of the heating cylinder is not densely filled with resin pellets. That is, the resin pellets supplied from the feed cylinder do not stay in the material supply holes, fall into the heating cylinder as they are, and are immediately sent to the front of the heating cylinder by the screw in the heating cylinder.
JP 2003-300211 A

  In the material supply apparatus as disclosed in Patent Document 1 described above, when performing maintenance work on a feed cylinder for moving resin pellets, the feed screw in the feed cylinder may have to be removed from the feed cylinder. is there. Usually, a drive mechanism for rotating the feed screw is provided behind the feed cylinder. For example, a relatively heavy electric motor is used as a drive source of the drive mechanism. Therefore, before removing the feed screw from the feed cylinder, an operation of removing the relatively heavy drive mechanism from the feed cylinder must be performed. The operation of removing the drive mechanism is difficult to perform by one person, and must be performed by a plurality of workers, and there is a problem that the maintenance work takes time and labor.

  The present invention has been made in view of the above-described problems, and provides a material supply apparatus for a molding machine having a configuration in which even a single operator can easily remove a feed screw from a feed cylinder when performing maintenance work. The purpose is to do.

  In order to achieve the above object, according to the present invention, there is provided a material supply apparatus for a molding machine, a feed cylinder having a feed screw for feeding resin therein, and a feed screw drive mechanism attached to the feed cylinder. There is provided a material supply device for a molding machine, wherein the feed screw can be removed from the feed cylinder in a state where the feed screw drive mechanism is attached to the feed cylinder. Is done.

  In the material supply apparatus of the molding machine described above, the feed screw drive mechanism includes a drive source and a rotation transmission mechanism that transmits power of the drive source to the feed screw, and the drive source is a shaft of the feed cylinder. It is good also as fixing to the position which removed from. The feed screw drive mechanism may be arranged in the axial direction of the feed cylinder and supported so as to be movable to a position deviated from the axial direction of the feed screw.

  Alternatively, the feed screw may be configured to be able to be extracted from the feed cylinder together with a part of the feed screw driving mechanism. The feed screw driving mechanism may include a motor having a hollow stator and a rotating part that rotates in the stator, and the rotating part may be fixed to the feed screw. The feed screw drive mechanism may include a rotation detector that detects the number of rotations of the motor, and the rotation detector may have a hollow structure so that the rotating portion penetrates the inside. The rotation detector may have a centering portion so that the stator can be centered.

  According to the present invention, when removing a screw from a feed cylinder, it is not necessary to remove the screw drive mechanism from the feed cylinder, and even a single operator can easily remove the screw from the feed cylinder. Therefore, the maintenance work of the material supply apparatus can be easily and efficiently performed by one worker.

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

  In FIG. 1, a 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 includes a mold device (not shown), a mold clamping device (not shown), and the injection device 100 described above. The mold apparatus includes a fixed mold and a movable mold. The mold clamping apparatus includes a fixed platen to which a fixed mold is attached, and a movable platen to which a movable mold is attached, and the mold clamping cylinder moves the movable platen forward and backward to close the mold, mold clamping and Mold opening is performed.

  The injection device 100 includes a heating cylinder 102, an injection nozzle 104 attached to the front end of the heating cylinder 102, a screw 106 that is rotatably and reciprocally disposed within the heating cylinder 102, and an outer periphery of the heating cylinder 102. The heaters h <b> 1 to h <b> 3 that are attached and the driving device 108 (not shown) disposed behind the heating cylinder 102 are provided.

  The screw 106 includes a spiral flight 110 formed so as to protrude from the outer peripheral surface of the rod-shaped main body portion, and a spiral groove 112 is formed along the flight 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 driving device 108 includes a measuring motor as a measuring drive unit and an injection motor as an injection driving unit.

  At a predetermined position near 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 location facing the rear end portion of the groove 112 in a state where the screw 106 is in the forward limit position in the heating cylinder 102. And the resin supply apparatus 10 is attached to the part in which the resin supply hole 102a was formed.

  The resin supply device 10 includes a hopper 12 as a storage unit that stores resin pellets that are molding materials. The resin pellets accommodated in the hopper 12 are sent to the resin supply hole 102a through the charging portion 14, and are supplied into the heating cylinder 102 from the resin supply hole 102a.

  The charging unit 14 includes a feed cylinder 16 that is disposed at a predetermined angle with respect to the horizontal direction, and a cylindrical guide unit 18 that extends downward from the front end of the feed cylinder 16. A feed screw 20 is rotatably provided in the feed cylinder 16. A feed motor 22 is provided at the rear end of the feed cylinder 16 as a drive mechanism for rotating the feed screw 20. The rear end of the feed cylinder 16 is connected to the hopper 12, and the front end is fixed to the guide portion 18.

  When the feed motor 20 is driven to rotate the feed screw 20, the resin pellets in the hopper 12 are supplied into the feed cylinder 16 and advanced along a groove formed on the outer peripheral surface of the feed screw 20. The resin pellets are fed into the guide unit 18 from the front end of the feed screw 20, fall inside the guide unit 18, and are supplied into the heating cylinder 102. At this time, each resin pellet falls in a line in 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 advanced along the grooves 112 and are heated and melted by the heaters h1 to h3. The molten resin is sent to the front of the screw 106. In the state where the screw 106 is in the retreat limit position in the heating cylinder 17, one shot of molten resin is stored in front of the backflow prevention device 116. When the molten resin is stored in front of the backflow prevention device 116, the injection motor is driven and the screw 106 is advanced. Thereby, the resin stored in front of the backflow prevention device 116 is injected from the injection nozzle 104 and filled in the cavity space of the mold device.

  The control unit 200 controls the injection molding machine to drive the injection motor and metering motor of the driving device 108, the feed motor 22 of the resin supply device 10, and the like, and to energize the heaters h1 to h3. Is provided. The control unit 200 includes a CPU as a calculation device, a memory as a recording device, and the like, and also includes a display unit, an operation unit, and the like, performs various calculations according to a predetermined program, data, and the like, and functions as a computer.

  Next, a resin supply apparatus that is a material supply apparatus for a molding machine according to a first embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of the resin supply apparatus according to the first embodiment of the present invention. 2, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted.

  The resin supply apparatus according to the first embodiment of the present invention includes a feed cylinder 16A, a guide portion 18A to which the tip of the feed cylinder 16A is connected, and a hopper 12 attached to the rear end of the feed cylinder 16A. In the present embodiment, the feed cylinder 16A and the guide portion 18A are integrated, but these may be connected to each other after being manufactured as separate parts.

  A feed screw 20A is rotatably provided in the feed cylinder 16A. A feed motor 30 is attached to the rear end of the feed cylinder 16A as a feed screw drive mechanism that drives the feed screw 20A. The feed motor 30 is provided to drive the feed screw 20A, similarly to the feed motor 22 shown in FIG. A motor shaft 32 that is a rotating portion of the feed motor 30 is formed integrally with the feed screw 20A. Therefore, by removing the motor shaft 32 from the feed motor 30, the feed screw 20A can be extracted from the feed cylinder 16A together.

  Here, the structure 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 fixed on the rotor 36. The rotor 36 has a hollow structure having a through hole in the center, and the motor shaft 32 is inserted into the through hole.

  A rotary encoder 38 for detecting the rotational speed of the rotor 36 is attached to the rear portion of the feed motor 30. The rotary encoder 38 includes a rotor 40 on which a scale is formed and a reading unit 42 that reads the scale. The rotor 40 is fixed to the rotor 36 by screwing and rotates together with the rotor 36. The reading unit 42 is fixed to a rear motor plate 44 that supports the stator 34.

  The rotor 40 of the rotary encoder 38 has a hollow structure having a through hole similar to that of 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 with screws. Therefore, the motor shaft 32, the rotor 40, and the rotor 36 are fixed to each other to form a rotating portion. As the rotor 36 rotates, the motor shaft 32 also rotates. In the present embodiment, the front portion of the motor shaft 32 is formed as a feed screw 20A, and the feed screw 20A rotates as the motor shaft 32 rotates.

  The rotor 40 is configured so that the rotation axis of the rotor 40 coincides with the rotation axis of the rotor 36 in a state in which the rotor 40 is fitted to the rotor 36. Further, the rotating shaft 32 is configured to be fitted to the rotor 40 so that the rotating shaft of the motor shaft 32 coincides with the rotating shaft of the rotor 36. Therefore, the rotor 40 is attached and fixed to the rotor 36, and the motor shaft 32 is attached and fixed to the rotor 40. The axes can be matched.

  The rotor 36 is rotatably attached to a front motor plate 46 and a rear motor plate 44 that support the stator 34 via bearings on the front side and the rear side. The front motor plate 46 is fixed to the flange plate 48. The flange plate 48 has a through hole in the center, and the motor shaft 32 is inserted into the through hole, so that the feed screw 20 </ b> A protrudes forward of the feed motor 30.

  The feed motor 30 is fixed to the feed cylinder 16A by fixing the flange plate 48 to the flange portion 16Aa of the feed screw 16A with a bolt or the like. The flange plate 48 and the flange portion 16Aa are provided with fitting portions. 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 feed screw 20A) and the feed cylinder 16A. The central axes are matched. A seal member 48 a such as an oil seal is provided between the motor shaft 32 and the flange plate 48, and is sealed so that the resin pellet powder does not enter the feed motor 30 from the feed cylinder 16 </ b> A.

  In the present embodiment, the diameter of the portion of the motor shaft 32 that passes through the flange plate 48 (that is, the portion sealed by the seal member 48a) is configured to be larger than the diameter of the feed screw 20A. In addition, the diameter of the portion of the motor shaft 32 that extends into the rotor 36 is configured to be larger than the diameter of the portion that penetrates the flange plate 48 (that is, the portion that is sealed by the seal member 48a). Thereby, the motor shaft 32 can be pulled out from the rear side of the feed motor 30 without the feed screw 20A interfering with the seal member 48a.

  According to the feed motor 30 configured as described above, the feed motor 30 (that is, the fixed portion provided with the stator 34) in a state where the motor shaft 32 on which the feed screw 20A is formed is removed is attached to the feed cylinder 16A. Can be attached. After the feed motor 30 is attached, the motor shaft 32 on which the feed screw 20A is formed is inserted into the through hole of the rotor 40 and the through hole of the rotor 36 from the rear of the feed motor 30 to fix the motor shaft 32 to the rotor. Thus, the feed screw 20A protrudes forward of the feed motor 30 and is disposed in the feed cylinder 16A in a state where the rotation axis of the feed screw 20A is aligned with the central axis of the feed cylinder 16A.

  Therefore, when extracting the feed screw 20A from the feed cylinder 16A, it is only necessary to remove the motor shaft 32 from the rotor 40 and extract it backward. The feed screw 20 </ b> A is integrated with the motor shaft 32, and the feed screw 20 </ b> A can be extracted to the rear of the feed motor 30 through the through hole in the rotor 36 by extracting the motor shaft 32.

  As described above, according to the present embodiment, when it is necessary to remove the feed screw 20A from the feed cylinder 16A in maintenance work or the like, it is not necessary to remove the entire feed motor 30 from the feed cylinder 16A. The feed screw 20A can be extracted from the feed cylinder 16A simply by removing the fixing and pulling the motor shaft 32 backward. Therefore, it is not necessary to remove the heavy feed motor 30, and even one worker can easily remove the feed screw 20 </ b> A and perform maintenance work efficiently.

  When the feed screw 20A is assembled into the feed cylinder 16A after the maintenance work is completed, the tip of the motor shaft 32, that is, the feed screw 20A is inserted into the feed motor 30 and inserted into the motor motor 32 as it is. Is inserted into the through hole of the rotor 36, and the motor shaft 32 is simply fixed to the rotor 40. Only by this assembling work, the rotational axis of the feed screw 20A can be aligned with the central axis of the feed cylinder 16A, and the rotational axis of the motor shaft 32 can also be aligned with the rotational axis of the feed motor 30.

  As described above, according to the present embodiment, the feed screw 20A can be easily detached and attached, and the maintenance work can be easily, quickly and efficiently performed.

  Next, a material supply apparatus for a molding machine according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view of a resin supply device as a material supply device according to a second embodiment of the present invention. 3, parts that are the same as the parts shown in FIG. 2 are given the same reference numerals, and descriptions thereof will be omitted.

  In the present embodiment, the feed screw is not directly attached to the motor shaft and rotated, but is attached to the shaft of the rotation transmission mechanism and rotated via the rotation transmission mechanism. In this embodiment, a rotation transmission mechanism is constituted by a pair of pulleys and a belt engaged therewith.

  As shown in FIG. 3, the feed screw drive mechanism for driving the feed screw 20A has a pair of pulleys 50A and 50B, a belt 52 engaged with the pulleys 50A and 50B, and a feed motor 54 for driving the pulley 50B. The pulley 50A is rotatably supported by a bearing in a frame constituted by the flange plate 56 and the motor support 58. By attaching the flange plate 56 to the feed cylinder 16A, the entire drive mechanism can be attached to the feed cylinder 16A.

  The pulley 50A is rotatably supported by a bearing in the space between the flange plate 56 and the motor support 58. The pulley 50A has a hollow structure having a through hole in the center, and a pulley shaft 60 that is a rotation transmission member is inserted into the through hole. A feed screw 20 </ b> A is formed on the front side of the pulley shaft 60. The feed screw 20A is formed integrally with a pulley shaft 60 that is a rotation shaft of the pulley 50A. Therefore, by removing the pulley shaft 60 from the pulley 50A, the feed screw 20A can be extracted from the feed cylinder 16A together. By fitting the pulley shaft 60 into the through hole of the pulley 50A, the rotation shaft of the pulley shaft 60 can be aligned with the rotation shaft of the pulley 50A. Further, since the flange plate 56 is fitted and positioned in the flange portion 16Aa of the feed cylinder 16A, the rotation axis of the feed screw 20A that protrudes and extends from the flange plate 56 can be aligned with the center axis of the feed cylinder 16A. .

  The feed motor 54 is attached to the motor support 58 so that the rotation shaft thereof is positioned in parallel with the rotation shaft of the pulley 50A (that is, the rotation shaft of the pulley shaft 60). A pulley 50 </ b> B is fixed to the motor shaft 62 of the feed motor 54. When the feed motor 54 is driven to rotate the pulley 50B, the rotational force is transmitted to the pulley 50A via the belt 52, and as a result, the feed screw 20A rotates together with the pulley shaft 60.

  The motor shaft 62 is provided with a permanent magnet and constitutes a rotor of the feed motor 54. A stator 64 having an electromagnet is disposed around the motor shaft 62. The stator 64 is supported and fixed by a front motor plate 66 and a rear motor plate 68. The motor shaft 62 that is a rotor is rotatably supported by a front motor plate 66 and a rear motor plate 68 through bearings.

  The rear portion of the feed motor 54 is closed by the encoder plate 70. The rear end portion of the motor shaft 62 extends from the encoder plate 70 and is connected to the rotary encoder 72. The rotary encoder is a rotation detector that detects the rotation speed of the motor shaft 62.

  The portion where the belt 72 is provided is covered with a belt cover 74. A through hole provided in the motor support 58 at the rear of the pulley shaft 60 is closed by a cover 76.

  Further, in this embodiment, the diameter of the portion sealed by the seal member 48a of the pulley shaft 60 is configured to be larger than the diameter of the feed screw 20A. Further, the diameter of the portion sealed by the seal member 48a of the pulley shaft 60 is configured to be smaller than the inner diameter of the through hole of the pulley 50A. Thereby, the pulley shaft 60 can be easily pulled out from the rear side of the pulley 50A without the feed screw 20A interfering with the seal member 48a.

  According to the drive mechanism configured as described above, the drive mechanism (that is, the pulleys 50A and 50B and the feed motor 54) with the pulley shaft 60 formed with the feed screw 20A removed is attached to the feed cylinder 16A. Can do. After attaching the drive mechanism, the pulley shaft 60 on which the feed screw 20A is formed is inserted into the through-hole of the pulley 50A from the rear side of the pulley 50A, and the pulley shaft 60 is fixed to the pulley 50A, thereby rotating the feed screw 20A. With the shaft aligned with the center axis of the feed cylinder 16A, the feed screw 20A protrudes forward of the flange plate 56 and is disposed in the feed cylinder 16A.

  Therefore, when pulling out the feed screw 20A from the feed cylinder 16A, it is only necessary to remove the pulley shaft 60 from the pulley 50A and pull it backward. The feed screw 20A is integrated with the rotor shaft 60, and by pulling out the rotor shaft 60, the feed screw 20A can also be extracted to the rear of the rotor 50A through a through hole inside the rotor 50A. Since the feed motor 54 is provided at a position shifted from the rotation axis of the pulley shaft 60, it is not necessary to remove the feed motor 54 when the feed screw 20A is extracted from the feed cylinder 16A.

  As described above, according to this embodiment, when it is necessary to remove the feed screw 20A from the feed cylinder 16A in maintenance work or the like, it is not necessary to remove the feed motor 54 from the feed cylinder 16A, and the rotor shaft 60 can be fixed. The feed screw 20A can be extracted from the feed cylinder 16A by simply removing the rotor shaft 60 and pulling the rotor shaft 60 backward. Therefore, it is not necessary to remove the heavy feed motor 54, and even one worker can easily remove the feed screw 20A, and the maintenance work can be performed efficiently.

  Further, when the feed screw 20A is assembled into the feed cylinder 16A after the maintenance work is completed, the tip of the pulley shaft 60, that is, the feed screw 20A is inserted into the through hole of the pulley 50A and is inserted into the pulley 50A as it is. Is inserted into the through hole of the pulley 50A, and the pulley shaft 60 is fixed to the pulley 50A. Only by this assembling work, the rotational axis of the feed screw 20A can be aligned with the central axis of the feed cylinder 16A, and the rotational axis of the rotor shaft 60 can also be aligned with the rotational axis of the pulley 50A.

  As described above, according to the present embodiment, the feed screw 20A can be easily detached and attached, and the maintenance work can be easily, quickly and efficiently performed.

  Next, a resin supply apparatus as a material supply apparatus according to a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional view of a resin supply apparatus according to a third embodiment of the present invention. 4, parts that are the same as the parts shown in FIG. 2 are given the same reference numerals, and descriptions thereof will be omitted.

  In the resin supply apparatus according to the fourth embodiment of the present invention, the feed motor 80 is rotatably supported with respect to the feed cylinder 16B. The feed screw 20A and the motor shaft 32A are connected so as to be separable from each other. When removing the feed screw 20A, the feed screw 20A and the motor shaft 32A are disconnected and separated, and the feed motor 80 is turned upward, so that only the feed screw 20A can be pulled backward from the feed cylinder 16B. it can.

  In order to enable such a configuration, the feed cylinder 16B is divided into two parts, that is, a feed screw side cylinder part 16Ba and a feed motor side cylinder part 16Bb. It is attached to the cylinder part 16Ba so as to be able to turn. Since the cylinder portion 16Bb is turned in a state where the motor shaft 32A is present, the joint of the cylinder portions 16Ba and 16Bb is separated from the position of the rotation axis of the feed screw 20A when viewed from the side. 16Ba becomes the lower half and extends to the feed motor side.

  The feed screws 20A are fixed to each other by bolts 84 with respect to the motor shaft 32A. The cylinder portions 16Ba and 16Bb of the feed cylinder 16 are provided with opening windows (not shown) for tightening the bolt 84 with a tool such as a spanner.

  The configuration of the feed motor 80 is the same as that of the feed motor 30 shown in FIG.

  According to the present embodiment, when the feed screw 20A is extracted from the feed cylinder 16B, the bolt 84 is first removed to disconnect the motor shaft 32A and the feed screw 20A, and then the feed motor 80 is turned upward. Thereby, the space behind the feed screw 20A becomes a space, and the feed screw 20A can be pulled out from the cylinder portion 16Ba of the feed cylinder 16B. If the eyebolt 86 is attached to the feed motor 80, the eyebolt 86 can be lifted while turning upward by pulling the eyebolt 86 with a wire.

  Since the cylinder portion 16Bb fixed to the feed motor 80 is pivotally supported by the cylinder portion 16Ba, the cylinder portion 16Bb is not separated from the cylinder portion 16Ba, and is automatically lowered to the original assembly position by lowering the raised feed motor 80 downward. Can be restored. Then, by connecting the feed screw 20A and the motor shaft 32A with the bolt 84, the feed screw 20A can be returned to a state where it can be rotationally driven.

  A connecting portion between the feed screw 20A and the motor shaft 32A can be connected by a fastening flange as shown in FIGS. FIG. 5 is a plan view of the connecting portion, and FIG. 6 is a sectional view taken along line VI-VI. Flat portions 20Aa and 32Aa are formed on the feed screw 20A and the motor shaft 32A, the flat portions 20Aa and 32Aa are sandwiched between fastening flanges 88 from both sides, and are fastened and fixed by bolts 84, whereby the feed screw 20A and the motor shaft are fixed. 32A is connected.

  As described above, according to the present embodiment, the feed screw 20A can be easily extracted from the feed cylinder 16B by turning the feed motor 80 with respect to the feed cylinder 16B. Therefore, there is no need to remove the heavy feed motor 80, and even one worker can easily remove the feed screw 20A, and the maintenance work can be performed efficiently.

  Further, when the feed screw 20A is assembled into the feed cylinder 16B after the maintenance work is completed, the feed motor 20A inserted into the feed cylinder 16B and then the feed motor 80 that has been turned upward is returned to its original state. It is only necessary to connect the shaft 32A and the feed screw 20A.

  As described above, according to the present embodiment, the feed screw 20A can be easily detached and attached, and the maintenance work can be easily, quickly and efficiently performed.

It is sectional drawing of the injection apparatus with which the resin supply apparatus which is a material supply apparatus of the molding machine which can apply this invention was attached. It is sectional drawing of the resin supply apparatus as a material supply apparatus by 1st Example of this invention. It is sectional drawing of the resin supply apparatus as a material supply apparatus by 2nd Example of this invention. It is sectional drawing of the resin supply apparatus as a material supply apparatus by 3rd Example of this invention. It is a top view of the connection part of a feed screw and a motor shaft. FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Resin supply apparatus 12 Hopper 14 Input part 16,16A, 16B Feed cylinder 16Aa Flange part 16Ba, 16Bb Cylinder part 18 Guide part 20, 20A Feed screw 22, 30, 54, 80 Feed motor 32, 32A, 62 Motor shaft 34, 64 Stator 36 Rotor 38, 72 Rotary encoder 40 Rotor 42 Reading unit 44, 68 Rear motor plate 46, 66 Front motor plate 48 Flange plate 48a Seal member 50A, 50B Pulley 52 Belt 56 Flange plate 58 Motor support 60 Pulley shaft 62 Motor shaft 70 Encoder plate 74 Belt cover 76 Cover 82 Pin 84 Bolt 86 Eye bolt 88 Fastening flange 100 Injection device 102 Heating cylinder 102a Material supply Hole 104 injection nozzle 106 screw 108 drives 110 Flight 112 groove 200 controller

Claims (7)

A material supply device for a molding machine,
A feed cylinder having therein a feed screw for feeding a molding material;
Anda feed screw driving mechanism attached to the feed cylinder,
A material supply apparatus for a molding machine, wherein the feed screw drive mechanism is attached to the feed cylinder so that the feed screw can be extracted rearward from the feed cylinder. It is a material supply apparatus of the molding machine of Claim 1, Comprising:
The feed screw drive mechanism has a drive source and a rotation transmission mechanism that transmits the power of the drive source to the feed screw,
The material supply device for a molding machine, wherein the drive source is fixed at a position off the axis of the feed cylinder. It is a material supply apparatus of the molding machine of Claim 1, Comprising:
The material supply device for a molding machine, wherein the feed screw driving mechanism is disposed in an axial direction of the feed cylinder and is movably supported at a position deviated from the axial direction of the feed screw. It is a material supply apparatus of the molding machine of Claim 1, Comprising:
The material supply device for a molding machine, wherein the feed screw is configured to be able to be extracted from the feed cylinder together with a part of the feed screw driving mechanism. A material supply device for a molding machine,
A feed cylinder having therein a feed screw for feeding a molding material;
A feed screw drive mechanism attached to the feed cylinder,
With the feed screw drive mechanism attached to the feed cylinder, the feed screw can be extracted from the feed cylinder together with a part of the feed screw drive mechanism,
The feed screw driving mechanism includes a motor having a hollow stator and a rotating part that rotates in the stator, and the rotating part is fixed to the feed screw. . It is a material supply apparatus of the molding machine of Claim 5, Comprising:
The feed screw drive mechanism has a rotation detector that detects the number of rotations of the motor,
The rotation detector has a hollow structure so that the rotating part penetrates the inside thereof. It is a material supply apparatus of the molding machine of Claim 6, Comprising:
The rotation detector has a centering portion so that centering can be performed on the stator.

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