JP4745371B2 - Material metering device - Google Patents

Description

  In the present invention, for example, in order to obtain a mixed material by mixing resin materials of a base material and a masterbatch material at a predetermined blending ratio, the material measurement is performed by separately weighing and supplying the base material and the masterbatch material. It relates to a supply device.

This type of material metering device is disclosed in Patent Document 1, for example.
In this case, the rotor is rotatably arranged in a measuring chamber provided in communication with the lower end of the material hopper. An adsorption hole having a hole size corresponding to the particle size of the resin material (pellet-shaped master batch material) is provided on the outer peripheral surface of the measuring rotor. The resin material stored in the material hopper is adsorbed to the suction hole of the metering rotor, and the resin material is transferred to a predetermined position based on the rotation of the metering rotor while being weighed, and discharged to the material passage. It is like that.
Further, a discharge port for discharging the resin material in the material hopper is formed in a hopper portion of the lower outer peripheral surface of the material hopper that is separated from the vertical line passing through the center of the measuring rotor by a predetermined distance on one side.
JP 2000-176939 A

By the way, in the conventional apparatus, when the apparatus breaks down or the resin material in the material hopper is changed to another resin material, when the resin material in the material hopper is taken out, first, the lower portion of the material hopper is discharged. After removing the cap at the outlet, the resin material in the material hopper is taken out from the outlet.
At this time, the resin material present in the vicinity of the discharge port can be taken out relatively easily, but the resin material present on the upper outer peripheral surface of the weighing rotor of the hopper portion that is far from the discharge port is taken out. Is difficult and requires a lot of work and time.

  An object of the present invention is to provide a material metering and feeding device that can easily take out a resin material in a material hopper in view of the above-mentioned conventional problems.

In order to achieve the above object, a material metering device according to claim 1 of the present invention includes a material hopper for storing a resin material and having a material dropping port at a lower end thereof.
A weighing container disposed at a lower end of the material hopper;
A weighing wheel rotatably disposed in the weighing container;
A material retaining space that is provided in an upper portion of the measuring wheel and receives and retains the resin material dropped from the material dropping port at the upper outer peripheral surface of the measuring wheel;
A guide member provided along the outer peripheral surface of the metering wheel and forming a material supply path communicating with the material retaining space between the outer peripheral surface of the metering wheel;
A material metering and feeding device for transferring the resin material in the material holding space along the material feeding path in proportion to the peripheral speed of the metering wheel,
The material storage space is set in a portion located on the opposite side of the material supply path from a vertical line passing through the rotation center of the metering wheel,
The weighing container is provided with a discharge path for allowing the resin material in the material storage space to flow down along the outer peripheral surface of the weighing wheel,
The discharge path is provided with an opening / closing member that can be switched between an open position for opening the discharge path and a closed position for closing the discharge path.

According to the above configuration, after the resin material in the material hopper flows down from the material dropping port into the material holding space in the measuring container, the amount of the resin material proportional to the peripheral speed of the measuring wheel is generated by the feeding action by the rotation of the measuring wheel. Sent along the supply path.
Also, when removing the resin material in the material hopper, such as when the device breaks down or the resin material in the material hopper is changed to another resin material, the opening / closing member is placed in the open position, The resin material that has flowed down from the material drop port of the hopper into the material holding space in the measuring container flows down the discharging path along the outer peripheral surface of the measuring wheel and is discharged.
Thus, the resin material in the material holding space in the material hopper and the measuring container can be easily and quickly discharged by a simple operation of disposing the opening / closing member in the open position.

A material metering device according to claim 2 is the material metering device according to claim 1,
The opening / closing member is attached to the measuring container so as to be slidable in the opening / closing direction by a bolt and a long hole.
According to the above configuration, after the bolt is loosened, the opening / closing member can be easily switched between the open position and the closed position by sliding the opening / closing member in the opening / closing direction.

A material metering device according to claim 3 is the material metering device according to claim 1,
The opening / closing member is attached to the weighing container so as to be rotatable in an opening / closing direction by a hinge.
According to the above configuration, the opening / closing member can be easily switched between the open position and the closed position by rotating the opening / closing member in the opening / closing direction about the hinge.

A material metering device according to claim 4 is the material metering device according to any one of claims 1 to 3,
A discharge guide member is provided at the outlet of the discharge path to guide the resin material passing through the outlet to flow down.
According to the above configuration, the resin material that flows down the discharge path along the outer peripheral surface of the metering wheel passes through the outlet of the discharge path, and is then guided to the discharge guide member and discharged to a predetermined discharge position. The collected resin material can be recovered well without being scattered around the apparatus.

  The best mode for carrying out the present invention will be described in accordance with an embodiment.

[Example 1]
Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a longitudinal sectional view showing an entire material mixing and supplying apparatus provided with a plurality of material metering and supplying apparatuses according to Embodiment 1 of the present invention. FIG. 2 is a plan sectional view showing the relationship between the material mixing cylinder of the material mixing and supplying apparatus and a plurality of material metering and supplying apparatuses. FIG. 3 is a vertical cross-sectional view showing a material metering unit as a material metering device. FIG. 4 is a longitudinal sectional view showing a state in which the opening / closing member is disposed at the closed position with respect to the material holding space of the measuring container of the material measuring / supplying unit. FIG. 5 is a longitudinal sectional view showing a state in which the opening / closing member is disposed at the open position with respect to the material storage space of the measuring container of the material measuring / supplying unit.

As shown in FIGS. 1 and 2, the material metering device according to the first embodiment is installed facing a material inlet 2 provided at a predetermined position of a material extruder 1 corresponding to an injection molding machine. It is used in a material mixing and supplying apparatus that mixes and supplies various types of resin materials at a predetermined mixing ratio.
In addition, the material mixing and supplying apparatus is connected to the connecting tube 3 that is connected upright above the material charging port 2 of the material extruder 1 and is connected to the upper end of the connecting tube 3 and is connected to the material mixing passage 5. A material mixing cylinder 6 having a plurality of types, for example, a natural material (a resin material in which no additive is blended), a masterbatch material (a resin material and a colorant equivalent to a natural material), It is unitized to measure and supply each of other materials that contain additives in a set ratio) and recycled materials (gates, sprues, runners, etc., and waste resin product pulverized materials). The first to third material metering units 11, 12, and 13 (corresponding to the material metering device of the present invention) are provided.

As shown in FIG. 1, the material mixing cylinder 6 is divided into upper and lower parts, and a lower end flange 7a connected to the upper end of the connection cylinder 3 is arranged at the lower end of the lower cylinder part 6a, and the lower cylinder part 6a. An intermediate flange 7b is arranged at the upper end of the.
Moreover, the lower end of the upper cylinder part 6b is supported by the intermediate flange 7b, and the canopy 7c is arranged at the upper end of the upper cylinder part 6b.
Further, the lower end flange 7a and the intermediate flange 7b are connected by a plurality of support columns 8 arranged on the outer periphery of the lower cylindrical portion 6a, and the intermediate flange 7b and the canopy 7c are a plurality of components arranged on the outer periphery of the upper cylindrical portion 6b. The columns 9 are connected. A hanger 4 such as an eyebolt is attached to the center of the top surface of the canopy 7c.
On the intermediate flange 7b, a mounting board 10 is detachably attached by bolts or the like. On the mounting board 10, the first to third material metering supply units 11, 12, 13 are made of materials. The mixing cylinders 6 are arranged radially.

In the cylinders of the lower cylinder part 6a and the upper cylinder part 6b of the material mixing cylinder 6, a material mixing passage 5 is formed in a straight line. Moreover, it is preferable that the lower cylinder part 6a and the upper cylinder part 6b are formed of a transparent member so that each resin material passing through the material mixing passage 5 of the material mixing cylinder 6 can be visually recognized from the outside. It is desirable to be formed of a transparent glass material that is not easily affected.
The upper cylinder portion 6b is formed with a through-hole through which each material supply chute 65 of the first to third material metering supply units 11, 12, 13 described in detail below is inserted.

As shown in FIG. 3, the first material weighing supply unit 11 includes a material hopper 20, a weighing container 30, a weighing wheel 40, a material supply chute 65, an opening / closing member 70, and a material discharge chute 75. Are unitized.
The material hopper 20 holds a masterbatch material as a resin material transferred through a material supply duct (not shown), and a measuring container 30 which will be described in detail below on the lower end of the material hopper 20. A material dropping port 21 is formed to flow downward.

As shown in FIG. 3, the measuring container 30 is formed in a rectangular box shape, and is attached to the mounting board 10 with a bolt or the like at the lower end thereof.
A cylindrical measuring wheel 40 is rotatably arranged in the measuring container 30, and the measuring wheel 40 is rotated by using a drive motor 45 as a drive source (see FIG. 2).
Furthermore, as shown in FIG. 4, a material feed surface 40 a that forms an uneven surface is formed on the outer peripheral surface of the measuring wheel 40 by knurling or the like. The master batch material as a resin material is transferred along the material supply path 60 described below by the rotation operation of the measuring wheel 40.

As shown in FIG. 4, in the upper part of the weighing container 30, the material batch that holds the master batch material (resin material) dropped from the material dropping port 21 of the material hopper 20 on the outer peripheral surface of the weighing wheel 40 is held. A space 50 is provided.
In addition, a guide member 61 having an arc-shaped passage wall 62 that constitutes a material supply path 60 is disposed between the upper portion of the measuring container 30 and the middle of one side thereof and the outer peripheral surface of the measuring wheel 40.
Further, as shown in FIG. 3, one end of the material supply path 60 communicates with the material storage space 50, and the other end of the material supply path 60 has a predetermined angle from the base end to the front end (the master batch material has its own weight). The material supply chute 65 is disposed so as to be inclined downward at an angle capable of flowing down). The base end portion of the material supply chute 65 is fixed to the frame of the measuring container 30, and the distal end portion is inserted into the upper cylinder portion 6 b through the through hole of the upper cylinder portion 6 b of the material mixing cylinder 6.
Then, after the master batch material in the material holding space 50 is transferred along the material supply path 60 in proportion to the peripheral speed of the metering wheel 40, the material mixing chute 65 passes through the inside of the upper cylinder portion 6 b of the material mixing cylinder 6. (Material mixing passage 5) is supplied.

As shown in FIG. 4, the material storage space 50 in the measuring container 30 is set at a portion located on the opposite side of the material supply path 60 from the vertical line L passing through the rotation center of the measuring wheel 40. The measuring container 30 is provided with a discharge path 68 through which the master batch material (resin material) in the material holding space 50 flows down along the outer peripheral surface of the measuring wheel 40.
As shown in FIG. 5, the discharge path 68 is provided with an opening / closing member 70 that can be switched between an open position for opening the discharge path 68 and a closed position for closing the discharge path 68 as shown in FIG. Yes.

In the first embodiment, the opening / closing member 70 is attached to the lower surface of the extended portion extended to one side of the upper plate of the measuring container 30 by a bolt 72 and a long hole 73 so as to be slidable in the opening / closing direction (left-right direction in FIG. 4). ing.
Further, in the first embodiment, an inclined surface 70a configured to open and close the discharge path 68 along the outer peripheral surface of the metering wheel 40 and in cooperation with the outer peripheral surface of the metering wheel 40 is provided on the lower surface on the distal end side of the opening / closing member 70. Alternatively, an arc surface is formed.
When the opening / closing member 70 is disposed at the closed position, the distal end portion 70b of the inclined surface 70a approaches the outer peripheral surface of the measuring wheel 40 to close the discharge path 68, and when the opening / closing member 70 is disposed at the open position, The inclined surface 70a and the distal end portion 70b are configured to open the discharge path 68 while being separated from the outer peripheral surface of the measuring wheel 40 by a predetermined amount.

  In the first embodiment, a material discharge chute (corresponding to the discharge guide member of the present invention) 75 is disposed in the weighing container 30 in the vicinity of the outlet of the discharge path 68 in an inclined manner. The master batch material (resin material) passing through the outlet is guided down to a predetermined position by the material discharge chute 75.

As shown in FIGS. 1 and 2, the second material metering unit 12 and the third material metering unit 13 are also configured in the same manner as the first material metering unit 11, so that the same components Are denoted by the same reference numerals, and the description thereof is omitted.
A natural material as a resin material is supplied to the material hopper 20 of the second material measurement supply unit 12 through a material supply duct (not shown), and the material hopper 20 of the third material measurement supply unit 13 is supplied with resin. A recycled material as a material is supplied through a material supply duct (not shown).

The drive motors 45 that individually rotate and drive the metering wheels 40 of the first to third material metering units 11, 12, and 13 are connected to a control device (not shown) and set. The operation is controlled based on the program.
For example, when supplying a mixed material having a mixing ratio of 1: 1: 1 of a masterbatch material, a natural material, and a recycled material, the first to third material metering units 11, 12, 13 When the wheel outer diameters of the respective metering wheels 40 are the same, the control device controls the first so that the peripheral speeds of the respective metering wheels 40 of the first to third material metering supply units 11, 12, 13 are the same. The operation of each drive motor 45 of the third material metering unit 11, 12, 13 is controlled at the same speed.
Further, when the wheel outer diameters of the respective metering wheels 40 of the first to third material metering supply units 11, 12, 13 are different from each other, the first to third materials are fed in equal amounts. The number of revolutions of each metering wheel 40 is controlled so that the peripheral speeds of the metering wheels 40 of the material metering units 11, 12, 13 are the same.

The material metering supply device according to the first embodiment is configured as described above.
Therefore, at the time of material supply, the master batch material, the natural material, and the recycled material in each material hopper 20 of the first to third material measurement supply units 11, 12, and 13 are measured from the material dropping ports 21 to the measurement containers. After flowing down into the material storage space 50 in 30, masterbatch material, natural material, and recycled material in amounts proportional to the peripheral speed of each metering wheel 40 by the feeding action by rotation of each metering wheel 40 are the respective materials. After being transferred along the supply path 60, it is supplied through the respective material supply chutes 65 through the inside of the upper cylinder portion 6b of the material mixing cylinder 6 (material mixing passage 5), whereby the master batch material and the natural material are supplied. Then, the recycled material is mixed at a set mixing ratio to become a mixed resin material and falls in the material mixing passage 5 of the material mixing cylinder 6.
Thereafter, the mixed resin material falls in the connecting cylinder 3 and is introduced into the material inlet 2 of the material extruder 1 corresponding to the injection molding machine.

  The apparatus (injection molding machine, material extruder, first to third material metering units 11, 12, 13 etc.) fails or the first to third material metering units 11, 12, In the case of changing the resin material of the master batch material, natural material, and recycled material in the 13 material hoppers 20 with another resin material, for example, the master batch material in the material hopper 20 of the first material metering unit 11 is used. First, the bolt 72 is loosened by a predetermined amount.

Next, as shown in FIG. 5, the opening / closing member 70 is slid in the opening direction along the bolt 72 in the long hole 73 and is arranged at the opening position.
Then, the master batch material that has flowed down from the material dropping port 21 of the material hopper 20 into the material holding space 50 in the measuring container 30 flows down the discharge path 68 along the outer peripheral surface of the measuring wheel 40.
Thereafter, the master batch material passes through the outlet of the discharge path 68 and is then guided to a material discharge chute 75 as a discharge guide member and discharged to a predetermined discharge position.
In this manner, the master batch material in the material hopper 20 and the material storage space 50 of the measuring container 30 can be easily and quickly discharged by a simple operation of disposing the opening / closing member 70 in the open position.

As described above, in the first embodiment, the opening / closing member 70 can be easily switched between the open position and the closed position by sliding the opening / closing member 70 in the opening / closing direction with the bolt 72 loosened. it can.
In the first embodiment, the master batch material discharged after flowing down the discharge path 68 along the outer peripheral surface of the metering wheel 40 is guided to the material discharge chute 75 after passing through the outlet of the discharge path 68 and is discharged to a predetermined level. It is discharged to the position. Therefore, the discharged master batch material can be recovered well without being scattered around the apparatus.
Also, when taking out the natural material or the recycled material in the material hopper 20 of the second or third material metering unit 12, 13, each resin material is easily and quickly taken out by the same operation as described above (discharge). can do.

[Example 2]
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a longitudinal sectional view showing a material hopper opening / closing member of a first (or second or third) material metering unit as a material metering device according to Embodiment 2 of the present invention.
As shown in FIG. 6, in the second embodiment, the resin material (masterbatch material, natural material, or recycled material) in the material storage space 50 of the measuring container 30 flows down along the outer peripheral surface of the measuring wheel 40. An opening / closing member 170 that opens and closes the discharge path 68 is attached to an upper plate portion of the measuring container 30 so as to be opened and closed by a hinge 171 at one end portion (upper end portion in the drawing).
In addition, a closing member (not shown) is provided at a predetermined position of the measuring container 30 to engage and disengage with the opening / closing member 170 and hold the opening / closing member 170 in the closed position. The opening / closing member 170 is rotatable in the opening / closing direction about the hinge 171 in a state where the closing member is operated and the engagement with the opening / closing member 170 is released.
Since the other configuration of the second embodiment is configured in the same manner as the first embodiment, the same components are denoted by the same reference numerals and the description thereof is omitted.

Therefore, in the second embodiment, by operating the closing member (not shown) to disengage the opening / closing member 170, the opening / closing member 170 is rotated about the hinge 171 to the open position. The discharge path 68 along which the resin material (masterbatch material, natural material, or recycled material) that has flowed down from the material drop port 21 of the material hopper 20 into the material storage space 50 in the measuring container 30 runs along the outer peripheral surface of the measuring wheel 40. After flowing down, the material is guided to the material discharge chute 75 and discharged to a predetermined discharge position.
As described above, in the second embodiment, the resin material in the material hopper 20 and the material holding space 50 of the measuring container 30 can be easily and easily disposed by the simple operation of disposing the opening / closing member 70 in the open position with the hinge 171 as the center. It can be discharged quickly.

  In addition, this invention is not limited to the said Example 1 and 2, In the area | region which does not deviate from the summary of this invention, it can also be implemented with a various form.

It is a longitudinal cross-sectional view which shows the whole material mixing supply apparatus provided with the several material measurement supply apparatus which concerns on Example 1 of this invention. It is a plane sectional view which similarly shows the relationship between the material mixing cylinder of a material mixing supply apparatus, and several material measurement supply apparatuses. It is a longitudinal cross-sectional view which similarly shows the material measurement supply unit as a material measurement supply apparatus. It is a longitudinal cross-sectional view which shows the state by which the opening-and-closing member was arrange | positioned with respect to the material storage space of the measurement container of a material measurement supply unit similarly in the closed position. It is a longitudinal cross-sectional view which shows the state by which the opening-and-closing member was similarly arrange | positioned with respect to the material storage space of the measurement container of a material measurement supply unit. It is a longitudinal cross-sectional view which shows the opening-and-closing member of the material hopper of the 1st (or 2nd or 3rd) material measurement supply unit as a material measurement supply apparatus which concerns on Example 2 of this invention.

Explanation of symbols

6 Material Mixing Tube 11, 12, 13 First to Third Material Metering Units (Material Metering Device)
20 Material Hopper 21 Material Drop Port 30 Measuring Container 40 Measuring Wheel 50 Material Reserving Space 65 Material Supply Chute 70 Opening / Closing Member 75 Material Discharge Chute (Discharge Guide Member)

Claims (4)

A material hopper for storing the resin material and having a material dropping port at the lower end;
A weighing container disposed at a lower end of the material hopper;
A weighing wheel rotatably disposed in the weighing container;
A material retaining space that is provided in an upper portion of the measuring wheel and receives and retains the resin material dropped from the material dropping port at the upper outer peripheral surface of the measuring wheel;
A guide member provided along the outer peripheral surface of the metering wheel and forming a material supply path communicating with the material retaining space between the outer peripheral surface of the metering wheel;
A material metering and feeding device for transferring the resin material in the material holding space along the material feeding path in proportion to the peripheral speed of the metering wheel,
The material storage space is set in a portion located on the opposite side of the material supply path from a vertical line passing through the rotation center of the metering wheel,
The weighing container is provided with a discharge path for allowing the resin material in the material storage space to flow down along the outer peripheral surface of the weighing wheel,
The material metering / feeding device according to claim 1, wherein an opening / closing member capable of switching between an open position for opening the discharge path and a closed position for closing the discharge path is disposed in the discharge path. A material metering device according to claim 1,
The material weighing and feeding apparatus, wherein the opening and closing member is attached to the weighing container so as to be slidable in the opening and closing direction by a bolt and a long hole. A material metering device according to claim 1,
The material weighing and feeding apparatus, wherein the opening and closing member is attached to the weighing container so as to be rotatable in the opening and closing direction by a hinge. The material metering device according to any one of claims 1 to 3,
A material metering / feeding device according to claim 1, wherein a discharge guide member for guiding the resin material passing through the outlet to flow down is disposed at an outlet of the discharge path.

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