JP2023104260A - Raw material feed apparatus, mold apparatus and raw material feed method - Google Patents

Abstract

To prevent imbalances in the density of raw material in a cavity of a mold upon feeding of the raw material into the cavity.SOLUTION: A raw material feed apparatus 3 feeds raw material to a cavity 211 of a mold 2. The raw material feed apparatus 3 comprises: a sieve 61; a conveyance device 7 having a conveyance face 711 for conveying raw material from the sieve 61 to a raw material outlet at the upper part of the cavity 211; and a movement mechanism 8 for moving the raw material outlet so as to follow an aperture of the cavity 211.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a raw material supply device, a mold device, and a raw material supply method.

Patent Document 1 discloses a conventional raw material supply device (powder box in Patent Document 1). The powder box described in Patent Literature 1 is a box in which tile clay, which is a raw material, is accommodated. The powder box is formed in a shape with an open bottom, and is configured such that when the powder box is reciprocated along the lower mold, the raw material drops into the concave portion of the mold.

Japanese Patent Application Laid-Open No. 2001-225311

By the way, in the powder box described in Patent Document 1, for example, when using raw materials with low fluidity, it takes time for the raw materials that are about to fall from the opening in the bottom to separate from the raw materials remaining in the box. Therefore, when the powder box is moved along the lower mold and reaches the mold recess, the raw material comes out from the opening at the bottom of the powder box toward the mold recess, but it follows the movement of the powder box in the mold recess. to move. Therefore, there is a problem that the density of the raw material in the concave portion of the mold tends to be uneven.

SUMMARY OF THE INVENTION An object of the present invention is to make it difficult for the density of the raw material in the cavity to be uneven when the raw material is supplied into the cavity of the mold.

A raw material supply device according to one embodiment of the present invention is a raw material supply device that supplies a raw material to a cavity of a mold, and includes a sieve and a raw material exiting the sieve to a raw material outlet above the cavity. A conveying device having a conveying surface for conveying and a moving mechanism for moving the raw material outlet along the opening surface of the cavity are provided.

A mold apparatus according to one embodiment of the present invention comprises a mold having a concave mold having a cavity, a mold having a convex mold movable with respect to the concave mold, a sieve arranged outside the movement locus of the convex mold, and the A conveying device having a conveying surface for conveying the raw material discharged from the sieve to a raw material outlet located above the cavity, and a moving mechanism for moving the raw material outlet in a direction along the opening surface of the cavity.

A raw material supply method according to one embodiment of the present invention is a raw material supply method for supplying a raw material to a cavity of a mold, and includes a sieve and a raw material exiting from the sieve to a raw material outlet above the cavity. and a conveying device having a conveying surface for conveying, the raw material is supplied while moving the raw material outlet in a direction along the opening surface of the cavity.

According to the above aspect, when the raw material is supplied into the cavity of the mold, it is possible to make it difficult for the density of the raw material in the cavity to be uneven.

FIG. 1 is a schematic perspective view of a mold device according to an embodiment. 2(A) and 2(B) are schematic vertical cross-sectional views for explaining the operation of the transport path by the moving mechanism of the mold apparatus according to the embodiment. FIG. 3 is a schematic cross-sectional view along the vertical plane of the mold device according to the embodiment. FIG. 4 is a plan view of the scraping body according to the embodiment. FIGS. 5A to 5C are schematic vertical cross-sectional views for explaining the operation of the scraping device of the mold device according to the embodiment. FIG. 6A is a schematic cross-sectional view along a vertical plane for explaining molding by the mold according to the embodiment. FIG. 6B is a schematic vertical cross-sectional view illustrating a state in which a molded product is molded by the mold according to the embodiment. FIG. 7 is a schematic cross-sectional view in a vertical plane in which the molded article is moved after the molded article is molded by the mold according to the embodiment. FIG. 8 is a schematic cross-sectional view of a mold device according to a modification.

<Embodiment>
The mold device 1 according to the embodiment is a device that molds a molded product P1 (see FIG. 7) using a mold 2 from a supplied raw material. In the mold apparatus 1 according to this embodiment, the raw material can be supplied to the cavity 211 of the mold 2 so that the density becomes substantially uniform. Therefore, according to the mold device 1 according to the present embodiment, variations in the strength of the molded product P1 can be suppressed.

A molded product P1 according to the present embodiment is a plate-like member used for a contact portion with molten metal (sometimes referred to as a "molten metal contact portion") in an aluminum melting furnace. However, the molded product P1 is not particularly limited, and may be, for example, a panel material such as a tile, a wall panel, a ceiling panel, a floor panel, a partition, or a member having a shape other than the panel material. .

The raw material is powder. The powder according to this embodiment has extremely poor fluidity. The angle of repose of the powder may be greater than 50°, or even greater than 60°. The average particle size of the powder is 0.1 μm or more, more preferably 1 μm or more, still more preferably 4 μm or more, and preferably 4 mm or less, more preferably 2 mm or less, and still more preferably 1 mm. It is below. As used herein, the "average particle size" is measured by laser diffraction.

An example of the raw material is a composition obtained by adding glass fiber and water to a powder raw material. Examples of powder raw materials include heat-resistant inorganic materials. Examples of heat-resistant inorganic materials include wollastonite, silicon carbide, silicon nitride, aluminum nitride, boron nitride, aluminum titanate, alumina, mullite, spinel, zircon, zirconia, magnesia, petalite, fused silica, spodumene, and euclipt. tight, cordierite, sialon, graphite and the like.

The mold apparatus 1 includes a mold 2 and a raw material supply device 3 that supplies raw materials to the mold 2, as shown in FIG. The raw material supply device 3 can fill the cavity 211 of the mold 2 with the raw material and make the density of the raw material after filling substantially uniform.

Hereinafter, for convenience of explanation, as shown in FIG. 1, the direction along the horizontal plane in which the raw material supply device 3 and the mold 2 are arranged is defined as the "front-rear direction". 2 is defined as the "forward direction" and the opposite direction as the "backward direction". Also, the direction along the horizontal plane and perpendicular to the front-rear direction is defined as the "left-right direction".

(1) Mold The mold 2 forms the molded product P1 by pressing the raw material. The mold 2 includes a concave mold 21 , a convex mold 22 fitted into the concave mold 21 , and a mold driver 23 .

The concave mold 21 is one component of the concave mold 2 and has a cavity 211 filled with raw material. The concave mold 21 is a fixed mold. The concave mold 21 includes a lower punch 212 forming the bottom surface of the cavity 211 , a die 213 forming the inner side surface of the cavity 211 , and a die base 214 .

The lower punch 212 according to this embodiment is fixed to the installation surface G1. The top surface of the lower punch 212 is flat and the bottom surface of the cavity 211 . The die 213 can move vertically with respect to the upper surface of the lower punch 212 . A through path is formed in the central portion of the die 213 so as to extend therethrough in the vertical direction. The die 213 is formed in a substantially rectangular shape when viewed from above (hereinafter referred to as a plan view). The lower punch 212 is fitted into the through passage of the die 213 from below. The cavity 211 is a space surrounded by the through passage of the die 213 and the lower punch 212, and is formed in a rectangular parallelepiped shape in this embodiment. The upper surface of the die 213 and the opening surface of the cavity 211 are located on the same plane.

Note that the die 213 may be composed of a single member, or may be formed in a substantially square shape in a plan view by combining a plurality of blocks. Moreover, the cavity 211 is not limited to a rectangular parallelepiped shape, and may be, for example, a columnar shape, a triangular columnar shape, a pentagonal columnar shape, or the like.

The top surface of the die base 214 is flush with the top surface of the die 213 . Die base 214 is fixed relative to die 213 . Note that the die base 214 may be integrated with the die 213 or may be a separate body.

The convex mold 22 is one component of the mold 2 and is formed in a convex shape. The convex mold 22 moves vertically with respect to the concave mold 21 . In the mold 2 according to this embodiment, the convex mold 22 is a movable mold. The lower surface of the convex mold 22 faces the upper surface of the lower punch 212 . Also, the lower surface of the convex mold 22 is substantially parallel to the upper surface of the lower punch 212 . The convex mold 22 approaches the through passage (central portion) of the die 213 from above and is then fitted. In short, the convex mold 22 is configured so that its lower surface (molding surface) can move parallel to the lower surface of the cavity 211 in a direction approaching or separating (approaching and separating directions). The mold 2 can press the raw material filled in the cavity 211 with the convex mold 22 and the concave mold 21 to mold the molded product P1.

A mold driver 23 relatively moves at least one of the convex mold 22 and the concave mold 21 . In this embodiment, the die driving machine 23 moves the convex die 22, which is a movable die, in the vertical direction. The mold driving machine 23 is, for example, a press machine.

(2) Raw material supply device The raw material supply device 3 supplies raw materials to the cavity 211 of the mold 2 . As shown in FIG. 1, the raw material supply device 3 includes a frame 4, a hopper 5, a sieve device 6 having a sieve 61, a conveying device 7, a moving mechanism 8, and a scraping device 9. .

(2.1) Stand The stand 4 is a stand on which part or all of the raw material supply device 3 is installed. A hopper 5 and a sieve device 6 are installed on the frame 4 according to the present embodiment. The pedestal 4 supports the sieve device 6 so that the sieve 61 is positioned above the conveying device 7 and supports the hopper 5 so that the discharge port 53 of the hopper 5 is positioned above the sieve 61 .

(2.2) Hopper The hopper 5 has a raw material inlet 511 in the raw material supply device 3 . The hopper 5 has an input portion 51 that widens upward, and an input port 511 is formed in the upper end surface of the input portion 51 . Although the shape of the charging portion 51 of the hopper 5 is formed in the shape of an inverted truncated pyramid, it is not particularly limited and may be formed in the shape of an inverted truncated cone. The hopper 5 has a flow path 52 connected to an input portion 51 , and a discharge port 53 is formed at the lower end of the flow path 52 . The flow path 52 extends along the horizontal plane. Since the flow path 52 is provided between the inlet 51 and the outlet 53, the inlet 511 and the outlet 53 are arranged at offset positions in plan view.

The term "shifted" as used herein means that the centroid of the inlet 511 and the centroid of the outlet 53 are at different positions in a plan view. Therefore, even if a part of the inlet 511 and a part of the outlet 53 are overlapped in a plan view, it is within the scope of "the inlet 511 and the outlet 53 are arranged at positions shifted in a plan view". be.

(2.3) Sieve Device The sieve device 6 is a device for sieving the input raw material. The sieve device 6 includes a sieve 61 and a sieve vibration device 62, as shown in FIG.

The sieve 61 breaks up lumps of raw materials by sieving the raw materials. The sieve 61 is formed in the shape of a box having an opening on the upper surface, and can receive all the raw materials discharged from the discharge port 53 of the hopper 5 . The bottom surface of the sieve 61 has many holes and is formed in a mesh shape. It is preferable that each hole in the bottom surface of the sieve 61 has a uniform size on one side. Here, the dimension of one side means the dimension of one side of the quadrangle in which the hole is inscribed. For example, if the hole is circular, it means the diameter. The dimension of one side is, for example, 0.02 mm or more, more preferably 0.5 mm or more, still more preferably 1 mm or more, and preferably 30 mm or less, more preferably 20 mm or less, still more preferably 10 mm or less.

The sieve 61 according to the present embodiment has a bottom surface made of wire mesh and side surfaces made of a wooden plate assembled into a rectangular frame. However, the bottom surface of the sieve 61 is not limited to the wire mesh, and may be, for example, a resin mesh, punching metal, expanded metal, basket, strainer, or the like. Further, although the sieve 61 has only the bottom surface made of the wire mesh in this embodiment, the entire sieve may be made of the wire mesh. The wire diameter of the net is preferably 0.02 mm or more, more preferably 0.2 mm or more, still more preferably 0.5 mm or more, and preferably 3 mm or less, more preferably 2 mm or less, still more preferably. is 1 mm or less. In addition, the mesh of the net is appropriately set according to the raw material, but for example, it is preferably 2 mesh or more, more preferably 3 mesh or more, and preferably 635 mesh or less, more preferably 32 mesh or less. .

Sieve 61 has a plurality of wheels 611 . A plurality of wheels 611 support the sieve body on the pedestal 4 . The plurality of wheels 611 can move while rolling in the front-rear direction, and the sieve 61 can vibrate back and forth in the front-rear direction by the plurality of wheels 611 . Although the rotating shafts of the plurality of wheels 611 extend in the horizontal direction in this embodiment, the directions of the rotating shafts are not particularly limited as long as the sieve 61 can reciprocate.

The sieve vibration device 62 is a device that vibrates the sieve 61 . The sieve vibrating device 62 according to this embodiment can reciprocate the sieve 61 along the front-rear direction. However, the sieve vibrating device 62 does not have to be a linear motion along one direction as long as the sieve 61 can be vibrated. There may be.

The sieve vibrating device 62 uses, for example, a linear motion actuator that linearly moves a slider as a drive source. The slider is connected to the sieve 61 and vibrates the sieve 61 directly. The driving source of the sieve vibrating device 62 is not limited to the direct-acting actuator, and may be, for example, a motor, a solenoid, a cylinder, or the like. Also, the drive source may be any of electric drive, air drive, and hydraulic drive.

The sieve device 6 is arranged outside the movement locus of the convex mold 22 . The raw material sieved by the sieving device 6 is supplied to the mold 2 through the conveying device 7 .

(2.4) Conveying Device The conveying device 7 is a device that conveys the material dropped from the sieve 61 into the cavity 211 . The conveying device 7 includes a conveying path 71 having a conveying surface 711 , a conveying driving device 72 that moves the material on the conveying surface 711 to an exit (raw material exit), and a net 73 .

The transport path 71 is a path for moving raw materials. The transport path 71 has the transport surface 711 as described above. The transport surface 711 faces upward. At least a portion of the conveying surface 711 is located below the sieve 61 in the vertical direction.

The conveying surface 711 can convey the raw material to the raw material outlet of the conveying path 71 . As for the conveying surface 711, the raw material may be conveyed to the raw material outlet by moving the conveying surface 711 itself, or the raw material may be conveyed to the raw material outlet without moving the conveying surface 711 itself. An example of the moving transport surface 711 is a belt conveyor. Also, a roller conveyor for moving the container on the transport surface 711 may be used. An example of the non-moving conveying surface 711 is one using a vibrating feeder. In this embodiment, as an example of the transport surface 711, a structure using a vibration feeder will be described.

The conveying surface 711 is inclined with respect to the horizontal plane so as to be positioned downward toward the mold 2 . The conveying direction of the conveying surface 711 is parallel to the front-rear direction in plan view. The transport path 71 has raised portions 712 that rise from both ends of the transport surface 711 in the width direction. The rising portion 712 can prevent the raw material from falling from the conveying surface 711 during movement.

The raw material outlet of the conveying path 71 is an outlet surrounded by the front end of the rising portion 712 and the conveying surface 711 . However, the raw material outlet need only include the front edge of the conveying surface 711 and does not necessarily have to be surrounded by the rising portion 712 .

The transport driving device 72 is an oscillation device 720 that vibrates the transport surface 711 in this embodiment. The oscillation device 720 vibrates the conveying surface 711 to move the raw material to the raw material outlet. When the conveying surface 711 is the upper surface of the belt conveyor, the conveying driving device 72 is a motor that rotates the driving pulley of the belt conveyor.

The net 73 is arranged between the raw material outlet of the conveying path 71 and the cavity 211 . The net 73 can receive the raw material dropped from the raw material outlet and drop the raw material into the cavity 211 while loosening the raw material. Without the net 73, the raw material moving on the conveying path 71 may fall together when dropping from the raw material outlet. In this case, the density of the raw material filled in the cavity 211 is uneven. However, if the net 73 is provided between the raw material outlet and the cavity 211, even if the raw material falls in a lump from the raw material outlet, it can be received by the net 73 once. It can be placed in cavity 211 .

The conveying device 7 has a net vibration device 74 for vibrating the net 73 . By vibrating the net 73, the received material can be loosened and dropped little by little. The mesh 73 is fixed with respect to the transport path 71 and transmits the vibration of the transport surface 711 of the transport path 71 . Therefore, the net vibrating device 74 according to this embodiment is composed of the vibrating feeder oscillating device 720 . Of course, the mesh vibrating device 74 may be provided separately from the oscillating device 720 .

(2.5) Moving Mechanism The moving mechanism 8 moves the raw material outlet along the opening surface of the cavity 211 by moving the transport path 71 . The moving mechanism 8 includes a pair of moving rails 81, a moving body 82, and a transport path moving device 83, as shown in FIG.

The moving rail 81 extends along the front-rear direction. The pair of moving rails 81 are separated in the left-right direction and parallel to each other. The moving body 82 moves along the moving rails 81 . The transport path 71 is fixed with respect to the moving body 82 . In this embodiment, the moving body 82 is equipped with an oscillation device 720 , and the oscillation device 720 and the transport path 71 move together with the moving body 82 .

The transport path moving device 83 moves the moving body 82 along the moving rails 81 . The transport path moving device 83 is not particularly limited as long as it can move the moving body 82 along the moving rail 81, but for example, a configuration including a motor and a ball screw can be mentioned. The moving body 82 can be moved along the moving rail 81 by the motor rotating the ball screw around the axis. The transport path moving device 83 is not limited to a motor and a ball screw, and may be configured by a rack and pinion, or may be configured by a linear actuator.

The transport path moving device 83 can move the transport path 71 between the first position and the second position. The first position, as shown in FIG. 2A, is a position where the raw material outlet is located above the rear end of the cavity 211 . The second position is the position where the raw material outlet is located above the front end of the cavity 211, as shown in FIG.

As shown in FIG. 2(A), when the raw material is put into the hopper 5 with the conveying path 71 positioned at the first position, the raw material enters the sieve 61 . The raw material passed through the sieve 61 drops onto the conveying surface 711 while being loosened, and moves along the conveying surface 711 to the raw material outlet. The raw material dropped from the raw material outlet is further loosened by the mesh 73 and dropped near the rear end of the cavity 211 .

The transport path moving device 83 slowly moves the transport path 71 toward the second position (forward direction in this embodiment). This causes the raw material outlet to move forward. The falling raw material gradually shifts forward from where it falls into the cavity 211 (see FIGS. 2A, 2B, and 3).

The transport path moving device 83 moves the transport path 71 from the first position to the second position, and then moves it again from the second position to the first position. The conveying path moving device 83 may move the conveying path 71 back and forth many times to complete the filling of the material, or may complete the filling of the cavity 211 with the material only by moving forward. good too.

The movement speed between the first position and the second position of the raw material outlet of the conveying path 71 is not particularly limited, but is preferably 1 mm/sec or more, more preferably 5 mm/sec or more, and still more preferably 10 mm. /sec or more, preferably 100 mm/sec or less, more preferably 70 mm/sec or less, still more preferably 50 mm/sec or less.

The transport path moving device 83 can retract the transport device 7 from above the cavity 211 when filling of the raw material into the cavity 211 is completed. Here, all of the conveying path 71 is moved to a position that does not overlap the movement locus of the convex mold 22 . Thereby, interference between the mold 2 and the transport path 71 can be prevented.

(2.6) Scraping Device The scraping device 9 is a device that scrapes the raw material supplied into the cavity 211 along the opening surface of the cavity 211 . The scraping device 9 includes a scraping body 91 and a spatula driving device 92, as shown in FIG.

The scraping main body 91 is a part that constitutes the main body of the scraping device 9 . The scraping main body 91 includes a pair of spatulas 911 and 912 and a frame 914 connecting the pair of spatulas 911 and 912 .

The spatulas 911 and 912 scrape the raw material by moving in the first direction along the opening surface of the cavity 211 . The "first direction" here is not particularly limited as long as it is one direction along the opening surface of the cavity 211, but in this embodiment, the first direction is the front-rear direction. Here, the pair of spatulas is defined as a first spatula 911 and a second spatula 912 . The first spatula 911 and the second spatula 912 are arranged at a constant interval in the front-rear direction. An opening between the first spatula 911 and the second spatula 912 is a raw material passage port 913 through which the raw material dropped from the raw material outlet of the conveying path 71 passes.

The first spatula 911 and the second spatula 912 are plate-shaped. The tip of the first spatula 911 faces forward. The tip of the first spatula 911 is formed so as to become thinner toward the tip edge. The tip of the second spatula 912 faces backward. The tip of the second spatula 912 is formed so as to become thinner toward the tip edge. The lower surface of the first spatula 911 and the lower surface of the second spatula 912 are located on the same plane.

The spatula driving device 92 moves the scraping main body 91 in the first direction (here, the front-rear direction) to perform scraping with the spatula 911 and 912 . The spatulas 911 and 912 are moved in the front-rear direction while vibrating the spatulas 911 and 912 in two directions (here, left and right directions). As a result, scraping can be performed without the spatula 911 and 912 crushing the raw material filled in the cavity 211 .

The spatula driving device 92 includes a first driving section 920 that moves the scraping body 91 in the first direction, and a second driving section 921 that vibrates the scraping body 91 in the second direction. In this embodiment, as shown in FIG. 5, the scraping body 91 is fixed to the transport path 71, so that the scraping body 91 is moved in the first direction by the moving mechanism 8. As shown in FIG. Therefore, the first driving section 920 according to this embodiment is configured by the moving mechanism 8 .

The second driving part 921 is connected to the scraping body 91 as shown in FIG. The second driving part 921 moves in the first direction together with the scraping body 91 . The second drive unit 921 is not particularly limited, and examples thereof include stepping motors, solenoids, vibration actuators, and cylinder devices. The speed at which the spatula 911 and 912 are vibrated in the second direction (the lateral direction here) by the second drive unit 921 is not particularly limited, but is preferably 5 mm/sec or more, more preferably 50 mm/sec or more. It is more preferably 100 mm/sec or more, more preferably 3000 mm/sec or less, more preferably 2000 mm/sec or less, still more preferably 1000 mm/sec or less.

In this embodiment, the first drive unit 920 is composed of the moving mechanism 8, but the moving mechanism 8 for moving the spatula 911, 912 may be separately provided. Also, the spatula may be either one of the first spatula 911 and the second spatula 912 .

As shown in FIG. 5A, the first spatula 911 moves forward while filling the cavity 211 with raw material. At this time, the first spatula 911 vibrates in the left-right direction and moves forward to scrape. When the raw material outlet of the conveying path 71 moves to the second position, the second spatula 912 vibrates in the left-right direction and moves backward to perform scraping, as shown in FIG. 5(B). 5(C), the raw material surplus from the scraping is pushed out from above the die 213 by the second spatula 912 and stored in the recovery section 93. As shown in FIG. The raw material stored in the collection unit 93 may be reused or discarded.

The top surface of the raw material in the cavity 211 scraped by the scraping device 9 becomes flat along the opening surface of the cavity 211 and is flush with the top surface of the concave mold 21 . When the raw material filled in the cavity 211 drops from the raw material outlet of the conveying path 71, the raw material is filled uniformly without bias in density. , are substantially uniformly filled.

Thereafter, as shown in FIG. 6(A), the convex mold 22 descends and fits into the concave mold 21 . Then, the raw material is pressed by the convex mold 22 and the lower punch 212 . After the raw material is pressurized, the die 213 is lowered so that the top surface of the lower punch 212 and the top surface of the die 213 are flush with each other, as shown in FIG. 6B.

Thereafter, as shown in FIG. 7, the scraping body 91 moves forward, and the molded product P1 is moved forward by the scraping body 91. As shown in FIG. Molded product P1 moves onto die base 214 .

<Modification>
The above embodiment is but one of the various embodiments of the present invention. The embodiment can be modified in various ways according to the design etc., as long as the object of the present invention can be achieved. Modifications of the embodiment are listed below. Modifications described below can be applied in combination as appropriate.

In the above-described embodiment, the transport path 71 has a structure using a vibrating feeder, but as shown in FIG. 8, the transport path 71 may be a belt conveyor. As shown in FIG. 8, the transport path 71 includes a drive pulley 7111, a driven pulley 7112, and a belt 7113 that is looped around the drive pulley 7111 and the driven pulley 71112. As shown in FIG. The conveying surface 711 is composed of the upper surface of the belt 7113 .

The transport surface 711 is substantially parallel to the horizontal plane. As a result, the height of the conveying device 7 and the raw material supply device 3 can be suppressed, and the size of the mold device 1 can be reduced.

Although the hopper 5 and the sieving device 6 are installed on the pedestal 4 in the above embodiment, the hopper 5 and the sieving device 6 may be installed on the die base 214, for example. Further, although the conveying device 7 is installed on the die base 214 , it may be installed on the pedestal 4 . Also, the hopper 5 and the sieve device 6 may be fixed relative to the transport path 71 or may move together with the transport path 71 .

In the above-described embodiment, the sieve 61 is operated by the sieve vibration device 62 and sieved automatically, but the sieve 61 may be manually moved by the operator.

In the above embodiment, the raw material supply device has the hopper 5, but in the present invention, the hopper 5 may be omitted and the raw material may be put directly into the sieve 61.

In the above embodiment, the scraping device 9 is attached to the conveying path 71 and moves together with the conveying path 71, but instead of scraping by the scraping device 9, an operator may scrape manually. That is, the scraping device 9 may be omitted.

Although the bottom surface of the cavity 211 (the top surface of the lower punch 212) was flat in the above embodiment, it does not necessarily have to be flat in the present invention. The bottom surface of the cavity 211 may be, for example, a curved surface, an uneven surface, or the like.

In this specification, expressions with "substantially" such as "substantially parallel" or "substantially orthogonal" may be used. For example, "substantially parallel" means substantially "parallel", and includes not only a strictly "parallel" state but also an error of several degrees. The same applies to expressions with other "abbreviations".

In addition, in this specification, expressions such as "end" and "end" are used to distinguish between the presence or absence of "... portion". For example, "edge" refers to the distal portion of an object, while "edge" refers to an area of definite extent that includes the "edge". Any point within a certain range including the edge is regarded as an "edge". The same applies to other expressions with "... part".

<Effect>
As described above, since the raw material supply device 3 of the present embodiment includes the sieve 61, the conveying device 7, and the moving mechanism 8, the raw material loosened by the sieve 61 is placed on the cavity 211 by the conveying surface 711. The raw material that has been transported and loosened is supplied by the moving mechanism 8 while moving along the opening surface of the cavity 211 . Therefore, when the raw material is supplied into the cavity 211, the density of the raw material in the cavity 211 is less likely to be uneven.

Further, since the raw material supply device 3 according to the present embodiment includes the sieve vibrating device 62 that vibrates the sieve 61, the sieve 61 can be automatically vibrated, resulting in high workability.

In addition, since the conveying device 7 according to the present embodiment has the net 73 arranged between the raw material outlet and the cavity 211 and the net vibrating device 74 for vibrating the net 73, the raw material falling from the conveying surface 711 is However, it is possible to prevent the raw material from dropping together, and the density of the raw material in the cavity 211 is even less likely to be uneven.

Further, since the transport device 7 according to the present embodiment has a vibrating feeder including the oscillation device 720, the size of the transport device 7 can be easily reduced compared to a conveyor or the like.

Further, since the moving mechanism 8 is configured so that the conveying device 7 can be retracted from above the cavity 211 , the molding of the mold 2 can be prevented even if the conveying device 7 is present.

In addition, since the raw material supply device 3 according to the present embodiment includes the scraping device 9 that scrapes the raw material supplied into the cavity 211 along the opening surface of the cavity 211, If the excess raw material remains in the mold, unevenness in density occurs after molding, but this can be prevented.

Further, the scraping device 9 has a spatula that scrapes the raw material by moving in the first direction, and a spatula driving device 92 that moves the spatula in the first direction while vibrating the spatula in the second direction. Since the scraping can be performed without pressing the raw material, the density of the raw material in the cavity 211 is less likely to be uneven.

REFERENCE SIGNS LIST 1 mold device 2 mold 21 concave mold 211 cavity 22 convex mold 3 raw material supply device 6 sieve device 61 sieve 62 sieve vibrating device 7 conveying device 711 conveying surface 720 oscillator 73 net 74 net vibrating device 8 moving mechanism 9 scraping device 911 th one spatula (spatula)
912 second spatula (spatula)
92 Spatula drive device P1 Molded product

Claims (9)

A raw material supply device for supplying raw materials to a mold cavity,
a sieve;
a conveying device having a conveying surface for conveying the raw material exiting the sieve to a raw material outlet above the cavity;
a moving mechanism for moving the raw material outlet along the opening surface of the cavity;
comprising
Raw material feeder. Further comprising a sieve vibrating device for vibrating the sieve,
The raw material supply device according to claim 1. The conveying device is
a screen positioned between the raw material outlet and the cavity;
a net vibrating device for vibrating the net;
having
3. The raw material supply device according to claim 1 or 2. The conveying device has a vibrating feeder including an oscillator that vibrates the conveying surface.
The raw material supply device according to any one of claims 1 to 3. The moving mechanism is configured to be able to retract the conveying device from above the cavity,
The raw material supply device according to any one of claims 1 to 4. Further comprising a scraping device for scraping the raw material supplied into the cavity along the opening surface of the cavity,
The raw material supply device according to any one of claims 1 to 5. The scraping device is
a spatula that scrapes the raw material by moving in a first direction along the opening surface of the cavity;
a spatula driving device that moves the spatula in the first direction while vibrating it along the opening surface and in a second direction intersecting the first direction;
having
The raw material supply device according to claim 6. a concave mold having a cavity and a mold having a convex mold movable with respect to the concave mold;
a sieve disposed outside the convex locus of movement;
a conveying device having a conveying surface for conveying the raw material exiting the sieve to a raw material outlet above the cavity;
a moving mechanism for moving the raw material outlet in a direction along the opening surface of the cavity;
comprising
mold equipment. A raw material supply method for supplying a raw material to a mold cavity,
Using a raw material supply device comprising a sieve and a conveying device having a conveying surface for conveying the raw material discharged from the sieve to a raw material outlet located above the cavity,
supplying the raw material while moving the raw material outlet in a direction along the opening surface of the cavity;
Raw material supply method.

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