CN116652114A

CN116652114A - Core handling device

Info

Publication number: CN116652114A
Application number: CN202310158367.5A
Authority: CN
Inventors: 峯野慎也; 岩本翔太
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 2022-02-28
Filing date: 2023-02-23
Publication date: 2023-08-29
Also published as: JP2023125070A

Abstract

The present disclosure enables efficient removal of unwanted portions of the mandrel. The core conveying device comprises: a core support for supporting the core; a tray having one end portion and the other end portion for supporting a core unnecessary portion connected to the core; a carrying part for carrying the core supporting part and the tray from the first position to the second position along the carrying direction; a changing mechanism for changing the posture of the tray between a first posture in which the position of one end and the position of the other end in the vertical direction are the same, and a second posture in which the other end is located below the one end; and a receiving portion located below the other end portion of the tray in the second posture, the first position being a position where the core is disposed in the core support portion and the core is not necessarily disposed in the tray, the second position being a position where the core is taken out from the core support portion, the changing mechanism maintaining the tray in the first posture while being conveyed from the first position to the second position, and changing the tray to the second posture after being conveyed to the second position.

Description

Core handling device

Technical Field

The present disclosure relates to a core handling device.

Background

Conventionally, in the manufacture of sand cores, a mixture obtained by kneading sand and a binder is ejected from an ejection port of a mold toward a cavity and then sintered (for example, patent document 1). The passages communicating the cavity and the injection ports are also filled with a mixture of sand and binder. Removal is required because the portion molded in the channel is not required to be filled.

Patent document 1: japanese patent laid-open No. 2021-094591

Disclosure of Invention

Problems to be solved by the invention

In the step of removing the portion formed by filling the channel from the apparatus, the number of working steps may be increased, and there is room for improvement.

Means for solving the problems

The present disclosure may be implemented as follows.

(1) According to one aspect of the present disclosure, a core handling apparatus is provided. The core conveying device comprises: a core support for supporting the core; a tray having one end portion and the other end portion for supporting a core unnecessary portion connected to the core; a carrying section that carries the core support section and the tray from a first position to a second position in a carrying direction; a changing mechanism that changes a posture of the tray between a first posture in which a position of the one end portion and a position of the other end portion in a vertical direction are identical, and a second posture in which the other end portion is located below the one end portion; and a housing portion located below the other end portion of the tray in the second posture, wherein the first position is a position where the core is disposed on the core support portion and the core is not required to be partially disposed on the tray, the second position is a position where the core is taken out from the core support portion, the changing mechanism maintains the tray in the first posture while the tray is being conveyed from the first position to the second position, and the changing mechanism changes the tray into the second posture after the tray is conveyed to the second position. According to this aspect, the core is not required to be transported from the first position to the second position together with the core. Then, the tray is changed to the second posture by the changing mechanism, and therefore, the core supported by the tray is not required to be partially moved from one end portion toward the other end portion, and is separated from the tray and enters the lower housing portion. Thus, the core does not need to be partially entered into the accommodating portion without passing through a human hand, and thus the working time can be reduced.

(2) In the core conveying device according to the above aspect, the tray may be rotatably mounted to the conveying section about a first axis, and the changing mechanism may change the tray to the second posture by rotating the tray about the first axis. According to this aspect, the tray can be changed to the second posture by rotating the tray around the first axis.

(3) In the core conveying apparatus according to the above aspect, the changing mechanism may include: a bracket having a bracket one end portion and a bracket other end portion, the bracket one end portion rotatably supporting the tray about a second axis, the second axis being parallel to the first axis; a cam follower mounted to the other end of the bracket; and a cam plate that contacts the cam follower at a first surface extending in the conveying direction and a second surface parallel to and lower than the first surface, wherein the cam follower contacts the first surface during the period when the core support and the pallet are conveyed from the first position to the second position, and wherein the cam follower contacts the second surface after the core support and the pallet are conveyed to the second position, thereby moving the pallet downward in the second axial direction and rotating the pallet around the first shaft. According to this aspect, the first surface extending in the conveying direction contacts the cam follower while the tray is conveyed from the first position to the second position, and the distance between the second shaft and the first surface is thereby maintained, so that the tray can be maintained in the first posture. Then, after the tray is conveyed to the second position, the second surface located below the first surface contacts the cam follower, and thereby the second shaft moves downward, so that the tray can be changed to the second posture. Accordingly, the posture of the tray can be changed from the first posture to the second posture by switching the contact point between the cam follower attached to the bracket and the cam plate from the first surface to the second surface in conjunction with the conveyance of the tray.

Drawings

Fig. 1 is a perspective view of a core handling apparatus.

Fig. 2 is a first diagram illustrating the operation of the change mechanism.

Fig. 3 is a second diagram illustrating the operation of the change mechanism.

Detailed Description

A. Embodiments are described below:

fig. 1 is a perspective view of a core conveying apparatus 100 according to the present embodiment. Fig. 2 is a first diagram illustrating the operation of the change mechanism 40. Fig. 3 is a second diagram illustrating the operation of the change mechanism 40. Fig. 1 shows the front-rear direction, the left-right direction, and the up-down direction, which are orthogonal to each other. The front-rear direction is a depth direction of the core conveying apparatus 100, and the left-right direction is a width direction of the core conveying apparatus 100. The same applies to the drawings and descriptions shown later.

The core conveyance device 100 (fig. 1) includes a device housing 101 having an opening 102 at the front. The operator is working on the opening 102 of the apparatus housing 101. A receiving portion 70 for receiving the core unnecessary portion Wp is provided in front of the opening 102. In the present embodiment, the housing portion 70 has a box shape, but the shape of the housing portion 70 is not limited to the box shape. For example, a pocket-like storage portion 70 that can store the shape of the core unnecessary portion Wp may be used.

The core conveying apparatus 100 further includes a core support portion 14 for supporting the core W, a tray 16 for supporting the core unnecessary portion Wp, a core forming portion 20, a conveying portion 30, and a changing mechanism 40. The core support portion 14 and the tray 16 are moved in the front-rear direction by the carrying portion 30. The core forming section 20 is disposed in the depth of the core conveying apparatus 100. The core W molded by the core molding portion 20 is disposed at the core support portion 14 moved to the rear at the first position Pa, which is the stop position of the rear conveying portion 30 in a state of being connected to the core unnecessary portion Wp. The core W to which the core unnecessary portion Wp is connected is conveyed by the conveying section 30 to the second position Pb, which is the stop position of the forward conveying section 30, while being supported by the core support section 14. In the second position Pb, only the core W is taken out from the core W and the core unnecessary portion Wp by the operator. In the present embodiment, the core conveying device 100 includes the changing mechanism 40, so that the unnecessary core portion Wp is put into the housing portion 70 without being carried out by the hand of the operator. This reduces the number of steps required for the core manufacturing step because the step of removing the unnecessary portion Wp by the operator can be reduced.

The change mechanism 40 has two cam plates 10 and two cam followers 43. The two cam plates 10 are provided for moving each cam follower 43 in the up-down direction. The two cam plates 10 are fixed to a device frame, not shown, with a space therebetween in the left-right direction in a posture in which the extending direction is the front-rear direction. The two cam plates 10 are arranged below the moving path of the conveying section 30. Each cam plate 10 has a first surface 10a extending in the front-rear direction, which is the conveying direction, and a second surface 10b parallel to the first surface 10a and located below the first surface 10 a. In detail, each cam plate 10 has a shape for defining the position of the cam follower 43 in the up-down direction. As a shape for defining the position in the up-down direction, a shape in which the cam follower 43 is surrounded by the side surface rising from the first surface 10a, the opposing surface opposing the first surface 10a, and the first surface 10a may be employed. The same applies to the second surface 10b.

The core forming portion 20 has a die 21 and a plurality of die pins 22. The mold 21 has a cavity, an injection port, and a passage therein, which are not shown. The channel communicates the cavity with the injection port. The core sand is kneaded together with the binder, and is ejected from the ejection port of the mold 21 toward the cavity. In the present embodiment, an inorganic binder whose main component is water glass is used as the binder, but an organic binder whose main component is a resin may be used. The plurality of mold pins 22 are arranged at intervals in the left-right direction. Each of the mold pins 22 is provided so as to be movable in the up-down direction.

After the mold 21 is filled with the mixture of core sand and binder, the mixture is sintered. The core unnecessary portion Wp of the mixture filled in the passage and sinter-molded is connected to the front of the sinter-molded core W. After sintering, the core W to which the core unnecessary portion Wp is connected is taken out from the mold 21 by the plurality of mold pins 22. Specifically, the plurality of mold pins 22 move upward in a state of supporting the lower surface of the core W. As a result, as shown in fig. 1, the core W is supported by the plurality of mold pins 22, and the core unnecessary portion Wp is connected to the front of the core W.

The carrying section 30 includes a main body lever 31 and a driving section 12. The main body lever 31 is supported by a device frame, not shown, with the left-right direction as an axial direction. The main body lever 31 is moved in the front-rear direction by the driving force of the driving section 12. The carrying section 30 carries the core support section 14 and the tray 16 from the first position Pa to the second position Pb toward the front in the carrying direction.

The core support 14 has a plurality of pin plates 14a and a plurality of pins 14b. A plurality of pins 14b are fixed to the upper surface of each pin plate 14 a. The plurality of pins 14b are fixed in a posture in which the axial direction is along the up-down direction. The plurality of pin plates 14a are fixed to the rear of the main body lever 31 with a space therebetween in the left-right direction. Each pin plate 14a is disposed at a position that does not interfere with the mold pins 22 aligned in the left-right direction when the conveying section 30 moves to the first position Pa.

The core W supported by the mold pin 22 is turned to the core support 14 moved to the first position Pa. Specifically, the pins supporting the lower surface of the core W are switched from the mold pins 22 to the pins 14b by the downward movement of the mold pins 22. Thereby, the core W is supported by the pin 14b.

The tray 16 is disposed above the main body lever 31. The tray 16 supports the core unnecessary portion Wp by the upper surface. The flat plate-shaped tray 16 has one end 16a and the other end 16b, which are ends in the front-rear direction. The other end 16b is located forward of the one end 16 a. The tray 16 is changeable between a first posture and a second posture. As shown in fig. 2, the first posture is a posture in which the positions of the one end portion 16a and the other end portion 16b in the vertical direction are the same. In the first posture, the upper surface of the tray 16 is parallel to the horizontal plane, and therefore the core unnecessary portion Wp can be supported by the upper surface. The second posture is a posture in which the other end portion 16b is located below the one end portion 16 a. The phrase "the positions of the one end portion 16a and the other end portion 16b are the same in the vertical direction" means that the angle between the line connecting the one end portion 16a and the other end portion 16b and the horizontal plane is within the range of 0 degrees±5 degrees. "the other end portion 16b is located below the one end portion 16 a" means that the line connecting the one end portion 16a and the other end portion 16b forms an angle of more than 5 degrees with the horizontal plane.

As shown in fig. 1, the change mechanism 40 also has two brackets 42. The changing mechanism 40 is provided so as to be movable in the front-rear direction in association with the carrying section 30. The changing mechanism 40 changes the posture of the tray 16. The two brackets 42 are disposed at both ends of the tray 16 in the left-right direction in a posture in which the extending direction is the up-down direction. The tray 16 is attached to the upper end of each bracket 42, that is, to the bracket one end 42 a. A cam follower 43 is attached to the lower end of the two brackets 42, i.e., the bracket other end 42b. The cam follower 43 rotates about a cam follower shaft 43a extending in the left-right direction. The bracket other end 42b of each bracket 42 is fixed to the cam follower shaft 43 a.

As shown in fig. 2, the change mechanism 40 further includes a first shaft 51 and a second shaft 52 extending in the left-right direction. The first shaft 51 is fixed to the carrying portion 30, specifically, to a shaft support portion 31a extending upward from the upper surface of the main body lever 31. The second shaft 52 is fixed to the bracket 42. The tray 16 is rotatably mounted about a first axis 51 and rotatably mounted about a second axis 52.

As shown in fig. 2, when the position of the cam follower 43 in the up-down direction changes downward, the bracket 42 moves the second shaft 52 downward, thereby rotating the tray 16 about the first shaft 51. Thereby, the tray 16 changes from the first posture to the second posture.

As shown in fig. 1, the molded core W and the core unnecessary portion Wp are disposed on the core support 14 and the tray 16, respectively, at the first position Pa. The core W and the core unnecessary portion Wp are carried from the first position Pa to the second position Pb. As shown in fig. 3, the cam follower 43 contacts the first surface 10a while being conveyed from the first position Pa to the second position Pb, and the tray 16 maintains the first posture.

At the second position Pb, the operator takes out only the core W from the core W and the core unnecessary portion Wp. After that, the carrying section 30 is moved to a position further forward than the second position Pb, and then the moving direction is changed, and the carrying section moves backward to carry the next core W. When moving rearward, the cam follower 43 contacts the second surface 10b of the cam plate 10. Specifically, as shown by the track OB of the cam follower 43, the cam follower 43 moves forward in a state of contact with the first surface 10a, turns back at the front end in the front-rear direction of the cam plate 10, and moves backward in a state of contact with the second surface 10b. The contact point between the cam follower 43 and the cam plate 10 is switched from the first surface 10a to the second surface 10b, and the bracket 42 moves the second shaft 52 downward. Thereby, the tray 16 rotates around the first axis 51 and changes to the second posture. Thus, the core unnecessary portion Wp supported on the tray 16 falls into the receiving portion 70 located below the other end portion 16b of the tray 16 in the second posture. This allows the core unnecessary portion Wp to be automatically recovered in the storage portion 70 without the hand of the operator. Specifically, the storage portion 70 is disposed on a track drawn by the falling core unnecessary portion Wp.

As shown in fig. 1, the cam follower 43 moves backward in a state of being in contact with the second surface 10b to the rear end portion of the cam plate 10 in the front-rear direction, turns back, and is again in contact with the first surface 10 a. Thereby, the tray 16 changes to the first posture. Then, at the first position Pa, the core unnecessary portion Wp is arranged on the tray 16 in the first posture.

According to the embodiment described above, the changing mechanism 40 included in the core conveying apparatus 100 maintains the first posture of the tray 16 while being conveyed from the first position Pa to the second position Pb, and changes the tray 16 to the second posture after being conveyed to the second position Pb. Thus, the core unnecessary portion Wp supported by the tray 16 moves from one end 16a to the other end 16b, and moves away from the tray 16 and enters the lower accommodating portion 70. In this way, the core unnecessary portion Wp enters the accommodating portion 70 without going through a human hand, and thus the working time can be reduced.

The changing mechanism 40 rotates the tray 16 about the first axis 51, thereby changing the tray 16 to the second posture. Accordingly, the tray 16 can be changed to the second posture by rotating the tray 16 around the first shaft 51.

The change mechanism 40 further includes: a bracket 42 that rotatably supports the tray 16 about the second shaft 52 at a bracket one end 42a, and that mounts the cam follower 43 at the bracket one end 42 a; and a cam plate 10 connected to the cam follower 43. The cam plate 10 has a first surface 10a and a second surface 10b located below the first surface 10 a. In this way, the contact point between the cam follower 43 and the cam plate 10 is switched from the first surface 10a to the second surface 10b in conjunction with the conveyance by the conveyance unit 30, and the tray 16 can be changed to the second posture.

B. Other embodiments:

(B1) In the above embodiment, the posture of the tray 16 is changed by the cam follower 43 and the cam plate 10 provided in the changing mechanism 40. In addition to this, the posture of the tray 16 may be changed by providing the changing mechanism 40 with a mechanism for rotating the tray 16. Specifically, the changing mechanism 40 may have a motor, and the posture of the tray 16 may be changed by rotating the tray 16 by driving the motor.

(B2) In the above embodiment, the tray 16 is changed to the second posture by moving the second shaft 52 downward. In contrast to this, the tray 16 may be changed to the second posture by moving the second shaft 52 upward. Specifically, the second shaft 52 may be disposed between the first shaft 51 and the one end 16a, the second surface 10b may be disposed above the first surface 10a, and the second shaft 52 may be moved upward to move the one end 16a upward with respect to the other end 16b, thereby changing the second posture.

The present disclosure is not limited to the above-described embodiments, and may be implemented in various configurations within a scope not departing from the spirit thereof. For example, the technical features of the embodiments corresponding to the technical features of the embodiments described in the summary of the invention can be replaced or combined as appropriate to solve part or all of the above-described problems or to achieve part or all of the above-described effects. Note that, as long as the technical features are not described as an essential part in the present specification, they can be deleted appropriately.

Description of the reference numerals

10 … cam plate; 10a … first side; 10b … second face; 12 … drive part; 14 … core support; 14 … pin plate; 14b … pins; 16 … tray; 16a …;16b … at the other end; 20 … core forming section; 21 … mold; 22 … mold pins; 30 … conveying part; 31 … body stem; 31a … shaft support; 40 … change mechanism; 42 … rack; 42a … support one end; 42b … bracket other end; 43 … cam follower; 43a … cam follower shaft; 51 … first shaft; 52 … second axis; 70 … receiving portion; 100 … core handling apparatus; 101 … device frame; 102 … opening portions; pa … first position; pb … second position; a W … core; the Wp … core does not require part.

Claims

1. A core conveying device is provided with:

a core support for supporting the core;

a tray having one end portion and the other end portion for supporting a core unnecessary portion connected to the core;

a carrying section that carries the core support section and the tray from a first position to a second position in a carrying direction;

a changing mechanism that changes a posture of the tray between a first posture in which a position of the one end portion and a position of the other end portion in a vertical direction are identical, and a second posture in which the other end portion is located below the one end portion; and

a receiving portion positioned below the other end portion of the tray in the second posture,

the first position is a position where the core is disposed in the core support portion and the core is not required to be partially disposed in the tray,

the second position is a position in which the core is removed from the core support,

the changing mechanism maintains the tray in the first posture during the tray is conveyed from the first position to the second position, and changes the tray to the second posture after the tray is conveyed to the second position.

2. The core handling apparatus of claim 1, wherein,

the tray is rotatably mounted on the carrying part around a first axis,

the changing mechanism changes the tray to the second posture by rotating the tray around the first axis.

3. The core handling apparatus of claim 2, wherein,

the change mechanism includes:

a bracket having a bracket one end portion and a bracket other end portion, the bracket one end portion rotatably supporting the tray about a second axis, the second axis being parallel to the first axis;

a cam follower mounted to the other end of the bracket; and

a cam plate connected to the cam follower at a first surface extending in the conveying direction and a second surface parallel to and lower than the first surface,

the cam follower is in contact with the first surface during the period when the core support and the pallet are transported from the first position to the second position, and the cam follower is in contact with the second surface after the core support and the pallet are transported to the second position, thereby moving the second shaft downward and rotating the pallet about the first shaft.