Mixing unit, and, mixed material manufacturing plant

Abstract

To provide a mixing unit capable of improving working environment.SOLUTION: A mixing unit 10 in a mixing plant 1 of this embodiment has a flexible container bag 5 (hereinafter referred to as a flexible container bag 5) formed into a bag shape from a flexible sheet material and in which a content is in a packed state, an input hopper 102 that holds the content input from the flexible container bag 5, and a support member 1022 that is installed in the input hopper 102 and supports the flexible container bag 5 in a state in which the content is being input into the input hopper 102. The flexible container bag 5, in the state supported by the support member 1022, puts the content into the input hopper 102 and closes the input hopper 102.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a mixing unit and a kneaded product manufacturing plant. [Background technology]

[0002] For example, Patent Document 1 discloses a continuous mortar mixing device that continuously produces mortar from raw material powder for mortar and water, characterized in that it comprises: a powder supply device that has a powder supply screw shaft that is driven to rotate about its axis and supplies the raw material powder in the axial direction, and a variable speed drive motor that drives the powder supply screw shaft to rotate at a variable speed, and the amount of raw material powder supplied can be adjusted by changing the rotation speed; a mortar kneading shaft that is driven to rotate about its axis and mixes and kneads the raw material powder with water to continuously produce mortar, and a mortar kneading device that has a variable speed drive motor that drives the mortar kneading shaft to rotate at a variable speed, and the properties of the mortar can be adjusted by changing the rotation speed. Patent document 2 also discloses an auxiliary device for opening and inserting flexible container bags, which is characterized by placing a seat plate on a specified insertion location on which a flexible container bag filled with powder or granular material can be loaded, and by forming a passageway in a cutout extending from at least one side of the seat plate to the center of the seat plate so that an outlet hole provided at the bottom of the flexible container bag can be opened. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-331265 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-337823 Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION An object of the present invention is to provide a mixing unit that can improve the working environment. [Means for solving the problem]

[0005] The mixing unit according to the present invention comprises a packing container formed into a bag shape from a flexible sheet material and containing packed contents, a holding container that holds the contents poured from the packing container, and a support member that is installed on the holding container and supports the packing container while the contents are being poured into the holding container, and the packing container, while supported by the support member, pours the contents into the holding container and closes the holding container.

[0006] Preferably, the support member is installed near the opening of the holding container and includes a peripheral support portion that supports the peripheral region of the bottom surface of the packaging container, and an opening that is provided at a position or size corresponding to an outlet provided on the bottom surface of the packaging container, and when the packaging container is supported by the support member, it blocks the opening of the support member.

[0007] Preferably, the support member is lattice-shaped or mesh-shaped and is installed inside the holding container, and when supported by the support member, the packaging container deforms to conform to the shape of the inside of the holding container and is in contact with the inside of the holding container.

[0008] Preferably, the apparatus further comprises a mixer located below the holding container and installed in a position close to the holding container when viewed from above.

[0009] Preferably, the holding container is installed at a position where at least a portion of the holding container overlaps with the mixer when viewed from above.

[0010] The device further includes a conveying section that is positioned vertically between the holding container and the mixer and that conveys the contents from the holding container to the mixer, and a plate-shaped guide section that is installed in a position that blocks part of the inlet of the conveying section.

[0011] The mixing device further includes a control valve for controlling the amount of content supplied from the holding container or the conveying section to the mixer.

[0012] Furthermore, the kneaded material manufacturing plant according to the present invention is a kneaded material manufacturing plant including a mixing unit, and the mixing unit has a packing container formed into a bag shape from a flexible sheet material and in a state where the contents are packed, a holding container that holds the contents poured from the packing container, and a support member that is installed on the holding container and supports the packing container in a state where the contents are poured into the holding container, and the packing container, while supported by the support member, pours the contents into the holding container and closes the holding container. [Effects of the Invention]

[0013] According to the present invention, the working environment can be improved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view illustrating an assembled mixing plant 1 according to the present embodiment. [Figure 2] 1 is a diagram illustrating an example of a mixing plant 1 before assembly in this embodiment. [Figure 3] FIG. 1 is a diagram illustrating a mixing unit 10. [Figure 4] 2 is a diagram illustrating the detailed configuration of the input hopper 102. FIG. [Figure 5] FIG. 2 is a schematic diagram illustrating the configuration of the mixing unit 10 in detail. [Figure 6] This is a schematic diagram explaining the flow path of cement S. [Figure 7] FIG. 2 is a diagram illustrating a first modified example of the mixing plant 1 of the present embodiment. [Figure 8] 10 is a diagram illustrating a state in which a flexible container bag 5 is placed in an input hopper 102 in the first modified example. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, but the scope of the present invention is not limited to the illustrated examples. First, the overall configuration of a mixing plant 1 will be described with reference to FIGS. FIG. 1 is a perspective view illustrating an assembled mixing plant 1 according to this embodiment. FIG. 2 is a diagram illustrating the mixing plant 1 before assembly in this embodiment. 1 and 2, the mixing plant 1 is an example of a mixed material manufacturing plant, and is an apparatus for mixing cement, which is a hydraulic hardening agent, or hardened material containing gypsum. The mixing plant 1 of this example produces ready-mixed concrete by mixing materials for concrete, mortar, or cement paste using cement as a hardening agent, specifically aggregate, cement, water, admixtures, etc. The mixing plant 1 is an on-board ready-mixed concrete manufacturing apparatus that is small enough to fit on the bed of a truck. When assembled, the mixing plant 1 has a short side W of 1.5 m or more and a long side L of 3.2 m or more and a long side L of 4.4 m or less. The height H1 of the mixing plant 1 is 2.4 m or more and a long side H2 of 2.3 m or more and a long side H2 of 2.6 m or less. The weight of the assembled mixing plant 1 is, for example, 3.8 t or less, specifically, 2.0 t or more and 3.0 t or less, and more specifically, 2.0 t or more and 2.7 t or less. The mixing plant 1 of this example is large enough in size and weight to be transported on the bed of a 3- to 4-ton truck. It can be separated into an upper unit and a lower unit to allow safe loading and unloading.

[0016] Next, the detailed configuration of the mixing plant 1 will be described with reference to FIGS. Figure 3 is a diagram illustrating an example of the mixing unit 10. Figure 3(A) is a diagram illustrating an example of a front view of the mixing unit 10, and Figure 3(B) is a diagram illustrating an example of a side view of the mixing unit 10. 3, the mixing plant 1 includes a mixing unit 10. The mixing unit 10 includes a supply section 100, a control valve 120, a discharge chute 130, and a mixer 140. The detailed configuration of the mixing unit 10 will be described later. The supply unit 100 is, for example, equipment that supplies cement S to the mixer 140. The supply unit 100 includes an input hopper 102 and a screw conveyor 104.

[0017] The input hopper 102 is an example of a holding container according to the present invention, and is a square or round container that temporarily holds the powdery or granular contents input from a flexible container bag 5 (hereinafter referred to as a FIBC 5). Specifically, the input hopper 102 temporarily holds powdery or granular cement S as a hydraulic hardening material, and supplies the temporarily held cement S to the mixer 140. The detailed configuration of the input hopper 102 will be described later. Furthermore, the feeding hopper 102 is located above the mixer 140 and is installed at a position close to the mixer 140 when viewed from above (as viewed from the Z arrow). The feeding hopper 102 in this example is installed at a position where at least a portion of it overlaps with the mixer 140 when viewed from above. In addition, the input hopper 102 may further be equipped with a vibration device such as a knocker, a vibrator, or an aerator to discharge the cement S remaining inside the flexible container bag 5 or the cement S remaining inside the input hopper 102.

[0018] The screw conveyor 104 is an example of a conveying section, and is a conveying device that conveys the cement S that has been placed in the input hopper 102 from the input hopper 102 to the mixer 140. The screw conveyor 104 is located between the input hopper 102 and the mixer 140 in the height direction (vertical direction), and conveys the cement S horizontally or in an upwardly inclined direction from the upstream side to the downstream side of the conveyance path of the cement S. The screw conveyor 104 in this example conveys the cement S in an upwardly inclined direction.

[0019] The control valve 120 is an example of a control valve according to the present invention. It is located between the screw conveyor 104 and the mixer 140 and controls the amount of material supplied from the screw conveyor 104 to the mixer 140. The control valve 120 may be, for example, a pneumatic valve equipped with an air cylinder, an electric valve equipped with an electric motor, a solenoid valve equipped with an electromagnet, or a shutter valve or butterfly valve that can be manually opened and closed. The control valve 120 in this example is made of metal, such as stainless steel or steel plate, and is a shutter valve that controls the amount of granular cement S supplied. The control valve 120 prevents excessive supply of cement S from the screw conveyor 104 to the mixer 140 due to, for example, operational vibrations of the screw conveyor 104 or the mixer 140 or backflow of air from the mixer 140.

[0020] The discharge chute 130 is an example of an introduction section, and is a flexibly deformable cylindrical member that introduces the cement S from the screw conveyor 104 to the mixer 140. One end of the discharge chute 130 is connected to the screw conveyor 104, and the other end is connected to the mixer 140. The discharge chute 130 is formed, for example, from fabric, polyester, nylon, polypropylene, PTFE cloth, urethane, silicone, or synthetic rubber, and the discharge chute 130 in this example is a cylindrical member formed from canvas. The discharge chute 130 prevents spillage and scattering of the powdered cement S during the process of introducing it.

[0021] The mixer 140 is an example of a mixer according to the present invention, and is a device for mixing materials for concrete, mortar, or cement paste, which are cement-based hardened bodies, specifically hardened body materials such as aggregate, cement, water, and admixtures. The mixer capacity of the mixer 140 in this example is 250 L from the viewpoint of compactness, but this is not limited to this, and the mixer can be changed to one with a larger capacity. The mixer 140 is located below the feeding hopper 102 and is installed in a position close to the feeding hopper 102 when viewed from above (as seen from the Z arrow). In this example, the mixer 140 is installed in a position where at least a portion of the mixer 140 overlaps with the feeding hopper 102 when viewed from above. The mixer 140 is not in contact with the feeding hopper 102 or the screw conveyor 104 so as not to be detected by the load cell.

[0022] Fig. 4 is a diagram illustrating the detailed configuration of the input hopper 102. Fig. 4(A) is a diagram illustrating the configuration of the input hopper 102, and Fig. 4(B) is a diagram illustrating a state in which a flexible container bag 5 is placed on the input hopper 102. Fig. 4(C) is an overhead view illustrating a state in which a flexible container bag 5 is placed on the hopper 102. 4(A), the input hopper 102 is cylindrical with openings of different sizes at both ends, and is formed into a cylindrical shape that narrows from the upstream side to the downstream side in the flow direction of the cement S, which is the content packed in the flexible container bag 5. The input hopper 102 includes a side wall portion 1020, a support member 1022, and a discharge port 1025. Side wall portion 1020 is a side wall portion of input hopper 102 formed in a cylindrical shape tapering from the opening (inlet 1022B) of input hopper 102 toward outlet 1025. Side wall portion 1020 may be in the shape of a square tube or a cylinder.

[0023] The support member 1022 is installed near the opening of the feeding hopper 102, and in this example, the support member 1022 is installed at the opening of the feeding hopper 102. The support member 1022 supports the flexible container bag 5 when cement S is being poured into the feeding hopper 102. The support member 1022 is a lid with an opening that functions as a support material that supports the flexible container bag 5 when cement S is being poured, and also functions as an opening size adjustment material that changes the size of the opening of the feeding hopper 102. The support member 1022 includes a support portion 1022A and a feeding port 1022B. The support portion 1022A is provided around the feeding port 1022B. The support portion 1022A is an example of a peripheral support portion according to the present invention, and is a support region that is located on the inner peripheral edge of the opening of the support member 1022 when installed in the input hopper 102, and supports the peripheral region of the bottom surface of the flexi-bag 5. The inlet 1022B is one example of an opening according to the present invention, and is an opening that is located at the center of the inner side of the opening of the support member 1022 when installed in the charging hopper 102, and is provided at a position or size corresponding to the discharge outlet for cement S provided on the bottom surface of the flexible container bag 5. The position of the inlet 1022B is provided at a position that overlaps with the discharge outlet for cement S of the flexible container bag 5 when the flexible container bag 5 is supported by the support member 1022A. Furthermore, the size of the inlet 1022B is formed to be smaller than the bottom surface of the flexible container bag 5 and larger than the discharge outlet for cement S located on the bottom surface of the flexible container bag 5 when the flexible container bag 5 is supported by the support member 1022A. The discharge port 1025 is an opening for discharging the cement S charged into the charging hopper 102 , and is smaller than the opening of the charging hopper 102 .

[0024] 4(B) and 4(C), the flexible container bag 5 is placed on the input hopper 102, in other words, supported by the support members 1022. When supported by the support members 1022, the flexible container bag 5 inputs its contents into the input hopper 102 and blocks the input hopper 102. When supported by the support members 1022, the flexible container bag 5 blocks the input hopper 102 together with the support members 1022. Specifically, when the flexible container bag 5 is supported by the support members 1022, the peripheral edge of the bottom of the flexible container bag 5 deforms and comes into close contact with the support members 1022, blocking the input port 1022B. This prevents the cement S packed in the flexible container bag 5 from flying out from the inside to the outside of the input hopper 102 during the operation of feeding the cement S packed in the flexible container bag 5 into the input hopper 102. Here, the flexible container bag 5 is in a state in which the contents are packed, and in this example, cement S in powder form is packed in the bag. The flexible container bag 5 is an example of a packaging container according to the present invention, and is a packaging material for transport formed into a bag shape from a flexible sheet material, and is formed into a bag shape, for example, having a cylindrical shape with a round bottom, or a prismatic shape with a square bottom. The flexible container bag 5 may have a cylindrical discharge outlet on its bottom, or if there is no discharge outlet, an opening may be formed on its bottom to serve as the discharge outlet. The flexible container bag 5 is made by forming a fabric woven from synthetic fibers into a bag shape. Specifically, the flexible container bag 5 is made by weaving a polypropylene fiber material into a bag shape. From the viewpoint of preventing the cement S from scattering and leaking and of moisture protection, the flexible container bag 5 may have a polyethylene material disposed inside it, for example, a polyethylene film may be laminated on the inner surface of the woven fabric, or an inner bag made of polyethylene may be provided.

[0025] Fig. 5 is a schematic diagram illustrating in detail the configuration of the mixing unit 10. Fig. 5(A) is a cross-sectional schematic diagram illustrating the detailed configuration of the supply section 100, and Fig. 5(B) is a schematic diagram illustrating the internal structure of the supply section 100 in a bird's-eye view. 5(A), the supply unit 100 is positioned higher in the height direction than the mixer 140 and is spaced apart (separation distance D) from the mixer 140 without contacting it. This allows the load cell to accurately detect the weight of each of the hardened materials, such as gravel, sand, and cement, that have been put into the mixer 140. The input hopper 102, the screw conveyor 104, the discharge chute 130, and the mixer 140 have continuous internal spaces. The discharge port of the screw conveyor 104 and the inlet port of the mixer 140 are positioned opposite each other in the vertical direction. This allows the cement S discharged from the supply unit 100 to fall vertically and be fed into the mixer 140.

[0026] As illustrated in FIGS. 5(A) and 5(B), the supply unit 100 includes a guide unit 106 in addition to the input hopper 102 and the screw conveyor 104. The guide unit 106 is detachably installed inside the supply unit 100. The guide unit 106 is plate-shaped and is installed in a position where it blocks a portion of the inlet of the screw conveyor 104 (the discharge outlet of the feeding hopper 102). The guide unit 106 blocks an area of ​​between one-third and three-quarters of the inlet of the screw conveyor 104, and the discharge outlet of the screw conveyor 104 and the inlet of the mixer 140 are located within this blocked area when viewed from above. By blocking a portion of the inlet of the screw conveyor 104, the guide unit 106 prevents the cement S from falling vertically and pouring into the inlet of the mixer 140. The guide unit 106 is installed with its plate surface horizontal or with its plate surface sloping downward from the upstream side to the downstream side in the flow direction of the cement S. Furthermore, the guide unit 106 diverts the flow path of the cement S from the upstream side to the downstream side in the flow direction. Specifically, the guide unit 106 changes the flow direction of the cement S from the vertical direction to the horizontal direction or to a direction inclined relative to the horizontal direction. The guide unit 106 in this example changes the flow direction of the cement S from a vertical path to a downward inclined path.

[0027] Next, with reference to FIG. 6, the state of the flexible container bag 5 and the cement S during operation of the mixing plant 1 will be described. FIG. 6 is a schematic diagram illustrating the flow path of the cement S. As shown in FIG. 6, a worker operates a crane and places the suspended flexible container bag 5 on a support member 1022 installed at the opening of the input hopper 102. The flexible container bag 5 placed on the support member 1022 blocks the input port 1022B, and together with the support member 1022, blocks the opening of the input hopper 102. This prevents the cement S packed in the flexible container bag 5 from flying out from the inside to the outside of the input hopper 102 while the cement S is being input into the input hopper 102. Note that although the flexible container bag 5 is placed on the support member 1022, it is also suspended by the crane, and the worker discharges the cement S remaining inside by raising and lowering the suspended flexible container bag 5, which gradually deflates, in accordance with the discharge state of the cement S.

[0028] Then, cement S is charged into the charging hopper 102 from the flexible container bag 5 placed on the support member 1022. The cement S discharged from the flexible container bag 5 flows from the flexible container bag 5 to the screw conveyor 104. At this time, part of the cement S flows from the vertical direction in a downward inclined direction along the plate surface of the guide section 106 (path F1A), and then flows vertically (path F1). In this way, the cement S moves to the screw conveyor 104 via the guide section 106. Then, the cement S moves in an upward inclined direction from the upstream side to the downstream side by the screw conveyor 104 (path F2), and then drops and moves vertically from the screw conveyor 104 via the discharge port and discharge chute 130 into the mixer 140 (path F3). In this way, by arranging the guide section 106 inside the mixing unit 10 and diverting the path, it is possible to prevent the cement S from being directly poured from the feeding hopper 102 into the mixer 140 via the shortest vertical path. This allows the load cell to accurately detect the weight of the cement S. In addition, by partially blocking the screw conveyor 104, the guide section 106 can prevent workers from getting caught in it.

[0029] As described above, according to the mixing unit 10 of the mixing plant 1 of this embodiment, during the operation of charging cement S into the charging hopper 102, by blocking the charging port of the charging hopper 102 with the flexible container bag 5, it is possible to prevent the cement S from flying out from the inside to the outside of the charging hopper 102, that is, to prevent the scattering of powdery cement S when charging the cement S. This reduces dust, thereby improving the working environment to a clean and favorable state and taking the surrounding environment into consideration. Furthermore, by using the flexible container bag 5 as a cartridge type, the capacity of the feeding hopper 102 can be reduced, which results in a reduction in the weight of the mixing unit 10.

[0030] Furthermore, according to the mixing unit 10 of this embodiment, the length of the screw conveyor 104 can be shortened by bringing the cement feeding hopper 102 and the mixer 140 closer together to shorten the cement transport distance. This shortens the time required to remove the cement remaining in the screw conveyor after construction, thereby reducing the time required for maintenance work. Furthermore, by shortening the screw conveyor, maintenance is easier even if the cement solidifies in the screw conveyor. Furthermore, manufacturing costs are reduced.

[0031] Furthermore, according to the mixing plant 1 of this embodiment, since it can be divided into two units, it can be made lighter and loading and unloading operations can be carried out safely using a crane. Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications and additions can be made without departing from the spirit of the invention.

[0032] Next, a modification of the above embodiment will be described. In the modified example, elements having substantially the same functions and configurations as those in the above embodiment are designated by the same reference numerals, and redundant explanations will be omitted. [Variation 1] In the above embodiment 1, the support member 1022 is described as being placed near the opening of the input hopper 102 to block the input port, but this is not limited to this and the support member 1022 may also be placed inside the input hopper 102 to block it. 7A and 7B are diagrams illustrating a first modified example of the mixing plant 1 of the present embodiment. Fig. 7A is a plan view illustrating the internal structure of the feeding hopper 102, and Fig. 7B is a cross-sectional view illustrating the internal structure of the feeding hopper 102. As illustrated in FIG. 7, the support member 1022 is lattice- or mesh-shaped with holes large enough to prevent the gradually deflated flexible container bag 5 from passing through, and may be made of, for example, punched metal or structural steel assembled in a lattice pattern. The support member 1022 is installed inside the feeding hopper 102, for example, at a position corresponding to the side wall portion 1020. Specifically, the support member 1022 is installed at a position where the flexible container bag 5 in the supported state comes into contact with the side wall portion 1020 and is tightly fitted to and deformed along the wall surface shape of the side wall portion 1020. The support member 1022 is installed at a position where the gradually deflated flexible container bag 5 will not be caught up in the screw conveyor 104 located downstream.

[0033] Figure 8 is a diagram illustrating a state in which a flexible container bag 5 is placed on an input hopper 102 in Modification 1. Figure 8(A) is a diagram illustrating a state in which a flexible container bag 5 is placed on an input hopper 102, and Figure 8(B) is an overhead view illustrating a state in which a flexible container bag 5 is placed on the hopper 102. As illustrated in Figures 8(A) and 8(B), the flexible container bag 5 is placed on the charging hopper 102, in other words, supported by the support members 1022. When supported by the support members 1022, the flexible container bag 5 deforms to fit the inner shape of the charging hopper 102. Specifically, the bottom surface 5A and the peripheral edge of the bottom surface 5A of the flexible container bag 5 deform to fit the shape of the inner wall surface of the side wall portion 1020. For example, a range of the flexible container bag 5 that is one-third or less of the height from the bottom surface of the flexible container bag 5 deforms to fit the inner shape of the charging hopper 102. The flexible container bag 5 comes into contact with the wall surface shape of the side wall portion 1020 without any gaps, thereby blocking the flow path of the cement S. This prevents the cement S packed in the flexible container bag 5 from flying out from the inside to the outside of the charging hopper 102 during the operation of charging the cement S packed in the flexible container bag 5 into the charging hopper 102. [Explanation of symbols]

[0034] 1. Mixing Plant 5 Flexible container bag 10 Mixing Unit 100 Supply section 102 Feeding hopper 1020 Side wall 1022 Support member 1022A Support part 1022B Inlet 1025 Outlet 104 Screw Conveyor 106 Guidance part 120 Control valve 130 Discharge Chute 140 Mixer

Claims

1. a packaging container formed into a bag shape from a flexible sheet material and containing contents; a holding container for holding the contents poured from the packaging container; a support member that is installed in the holding container and supports the packaging container in a state in which contents are poured into the holding container; and The packing container, while being supported by the support member, puts contents into the holding container and closes the holding container. Mixed unit.

2. the support member is disposed near the opening of the holding container and includes a peripheral support portion that supports a peripheral region of the bottom surface of the packaging container, and an opening that is provided at a position or with a size corresponding to a discharge outlet provided on the bottom surface of the packaging container, The packaging container closes the opening of the support member when supported by the support member.

2. The mixing unit of claim 1.

3. the support member is in the form of a grid or a net and is installed inside the holding container; The packaging container, when supported by the support member, deforms along the shape of the inside of the holding container and is in contact with the inside of the holding container.

2. The mixing unit of claim 1.

4. a mixer located below the holding container and installed in a position close to the holding container when viewed from above; Further having 3. The mixing unit of claim 2.

5. The holding container is installed at a position where at least a part of the holding container overlaps with the mixer when viewed from above.

5. The mixing unit of claim 4.

6. a conveying section positioned between the holding container and the mixer in the vertical direction and configured to convey the contents from the holding container to the mixer; a guide unit that is plate-shaped and is installed at a position that blocks a part of the insertion port of the conveying unit; Further having 6. The mixing unit of claim 5.

7. A control valve that controls the amount of content supplied from the holding container or the conveying unit to the mixer. Further having 7. The mixing unit of claim 6.

8. A kneaded product manufacturing plant including a mixing unit, The mixing unit is a packaging container formed into a bag shape from a flexible sheet material and containing contents; a holding container for holding the contents poured from the packaging container; a support member that is installed in the holding container and supports the packaging container in a state in which contents are poured into the holding container; and The packing container, while being supported by the support member, puts contents into the holding container and closes the holding container. Mixed material manufacturing plant.

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