CN112829048A - Forming mechanism and forming method of large-tonnage brick press - Google Patents

Abstract

The invention discloses a forming mechanism of a large-tonnage brick press, which comprises a base plate, a transmission belt, a mold frame and a mold core, wherein the transmission belt is arranged above the base plate, and the mold core is sleeved in the mold frame; the conveying belt is used for conveying powder and delivering the formed green bricks; the die frame comprises a die frame body and a powder separating part arranged at the lower end of the die frame body, the powder separating part is arranged at the position, close to a green brick, of the lower surface of the die frame body, and a powder sucking port is arranged at the position, far away from the green brick, of the lower surface of the die frame body. The application also discloses a forming method of the large-tonnage brick press. By adopting the scheme, the powder separating part can push away the powder outside the die frame forming cavity easily in the descending process of the die frame, the quality of the edge of the pressed green brick is improved, the green brick with the preset size can be obtained after the pressed green brick is formed, extra cutting is not needed, the powder amount during material distribution is reduced, the pressurizing area of a press is reduced, the energy consumption is reduced, and the cost of raw materials and energy is reduced.

Description

Forming mechanism and forming method of large-tonnage brick press

Technical Field

The invention relates to the field of hydraulic machinery, in particular to a forming mechanism and a forming method of a large-tonnage brick press.

Background

The forming process structure of the prior known super-tonnage ceramic press comprises the following steps: the mold comprises a mold frame with a double transmission belt and without a mold core, a mold frame with a single transmission belt and a mold frame without a transmission belt. These ultra-large tonnage ceramic presses typically produce ceramic plates having a length of more than 3 meters and a width of more than 1.2 meters.

Fig. 1 shows a "double conveyor belt no-core mold frame" type structure, which includes an upper conveyor belt 1 ', a lower conveyor belt 2', an upper mold core 3 'and a lower mold core 4'. The structure is characterized in that the lower mold core 4 'moves upwards, the lower conveying belt 2' is pressed to be in contact with the powder 5 ', the powder is pressed and molded, and the green bricks after powder molding are conveyed out of the interior of the press through the lower conveying belt 2'.

Fig. 2 shows a "single conveyor belt core" type structure, which includes a lower conveyor belt 2 ', a lower core 4 ' and an upper core 3 '. The structure is characterized in that the upper mold core 3 'directly contacts the powder 5', the powder 5 'is pressed and molded, and the green bricks molded by the powder are conveyed out of the interior of the press through the lower conveying belt 2'.

Fig. 3 shows a "belt-less, core-and-frame" type of structure, which is specifically composed of an upper core 3 ', a lower core 4', a shim plate 6 'and a frame 7'. The powder 5 'is distributed in the space formed by the lower mold core 4' and the mold frame 7 ', and then the upper mold core 3' presses the powder. After the powder is pressed into green bricks, the mould frame 7' descends, and the green bricks are sent out of the press by a skip car or other equipment.

Mold in the fig. 1 and 2 structures: during the process of powder pressing, when the powder is subjected to pressure, the powder can naturally spread in all directions due to the fact that the periphery of the powder is not supported by a frame with strong rigidity, most of areas with uneven pressure are formed at the periphery of a green brick beyond a mold core, the areas cannot be used and need to be cut off, and therefore huge waste is caused, especially for green bricks with large sizes.

Mold in the fig. 3 configuration: in the process of powder pressing, the size of the powder is consistent with the assumed value due to the limiting effect of the die frame on the powder. However, because the size of the green brick is too large, the short side of the green brick (the long side cannot be pushed because of the space limitation of the vertical columns and the like on the left side and the right side of the press) is pushed by the general brick pushing mechanism, and the green brick is easily damaged. The green brick is not transported smoothly in this respect as a conveyor belt.

At present, a press with small tonnage adopts a structure as shown in figure 4. Comprising an upper mould core 3 ', a lower conveyor belt 2 ' and a backing plate 6 '. The structure is characterized in that: the inner wall of the upper mold core 3 'is provided with a cavity, and powder is arranged between the lower conveying belt and the upper mold core 3'. The powder is pressed by the upper die core to be pressed into green bricks, and then the green bricks are conveyed by the lower conveying belt to leave the press. Although the problems of powder waste and smooth green brick transportation can be solved, the length and the width of large-size ceramics are large, the gap area 8 'of the stroke of the die core and the conveying belt is quite large, the pressing area of the press is large, the quantity of powder is large, the position of the upper die core, which is in contact with the powder, is the gap area 8' in the figure 4 instead of the green brick part which is actually needed, and the quality of the formed green brick is easily influenced. Therefore, this structure not only requires a greater pressing force, consumes more energy, and easily causes instability in the green brick quality. Specifically, when a large-size ceramic plate is pressed by using the forming mechanism having the above-described structure, if the gap area 8 ' is not parallel to the two planes of the inner wall of the upper core 3 ', the blank compression ratio of the gap area 8 ' is significantly higher than that of the blank at the position of the cavity of the inner wall of the upper core 3 ', and therefore the applied pressure is mainly concentrated on the gap area 8 '. At this time, if the pressure on the inner wall of the upper mold core 3' meets the process requirement, the pressure of the whole press must be increased, and energy is wasted. In addition, in the application technology of the press with small tonnage, a method for improving the parallelism of the gap area 8 'corresponding to the upper die core 3' and two planes of the inner wall of the upper die core 3 'is adopted by people to reduce the influence of the strong reverse thrust of the blank in the gap area 8' on the parallelism of the formed green bricks, but for a large-size ceramic plate die, the processing difficulty of the die frame is greatly increased, and the manufacturing cost is improved.

Disclosure of Invention

The invention provides a forming mechanism and a forming method of a large-tonnage brick press, aiming at solving the technical problem of low utilization rate of powder by the forming mechanism of the existing brick press, which can easily push away the powder outside a forming cavity of a mold frame in the descending process of the mold frame, ensure that the mold frame can be tightly attached to a transmission belt, improve the quality of the edge of a pressed brick blank, reduce the powder amount during material distribution, reduce the pressing area of the press, reduce the energy consumption and reduce the cost of raw materials and energy.

In order to solve the technical problem, the invention provides a forming mechanism of a large-tonnage brick press, which comprises a base plate, a transmission belt, a mold frame and a mold core, wherein the transmission belt is arranged above the base plate, the mold core is sleeved in the mold frame, and the mold frame is arranged above the transmission belt; the backing plate is used for providing support for the conveying belt in the green brick forming process; the conveying belt is used for conveying powder, is matched with the mold core, the mold frame and the base plate to press and mold green bricks, and sends out the molded green bricks; the die frame comprises a die frame body and a powder separating part arranged at the lower end of the die frame body, the powder separating part is arranged at the position, close to a green brick, of the lower surface of the die frame body, and a powder sucking port is arranged at the position, far away from the green brick, of the lower surface of the die frame body.

As an improvement of the scheme, the powder material separating part comprises a vertical surface facing the green bricks and an inclined surface back to the green bricks, and the inclined surface is gradually inclined to the direction of the green bricks from top to bottom.

As an improvement of the scheme, the powder suction port is a round hole and is connected with the powder suction channel, and the powder suction channel is connected with the powder suction port and the powder outlet positioned on the side face of the die frame body.

As an improvement of the scheme, the powder suction port is a strip-shaped hole, the powder suction port is connected with a powder suction channel with a strip-shaped cross section, and the powder suction channel is connected with the powder suction port and a powder outlet positioned on the side face of the die frame main body.

As an improvement of the scheme, the powder outlet is covered with a powder suction cover, and the powder suction cover is connected with the powder suction pipe.

As an improvement of the above scheme, the powder suction ports are distributed below four edges of the mold frame, or the powder suction ports are only distributed below two long edges of the mold frame.

Correspondingly, the invention also provides a forming method of the large-tonnage brick press, which is used for forming the powder by the forming mechanism of the large-tonnage brick press; the method comprises the following steps:

(1) powder is uniformly distributed on the conveying belt, the die frame descends, and the powder separating part of the die frame is contacted with the powder and gradually extends into the powder;

(2) after the powder separating part contacts the powder, the powder sucking port starts to suck away the powder, and the die frame continuously descends;

(3) the end part of the powder separating part descends to the right position, the powder sucking port stops sucking powder, and the mold core is pressed downwards to start pressing until pressing is finished;

(4) and after pressing is finished, demolding, lifting the mold core and the mold frame, and conveying the green bricks out through a conveying belt.

The implementation of the invention has the following beneficial effects:

according to the scheme, the powder separating portion is arranged on the die frame, the powder separating portion can push away powder outside the die frame forming cavity in the descending process of the die frame, the die frame can be attached to a transmission belt tightly, the quality of the edge of a pressed green brick is improved, the green brick with the preset size can be obtained after pressing forming, and extra cutting is not needed. Because the allowance cut after pressing is not required to be reserved during material distribution, the powder amount during material distribution can be reduced, and the pressurizing area of the press is reduced. After the pressing area is reduced, the whole green brick is applied with lower pressure, so that the green brick can obtain the forming pressure consistent with the original pressure, and therefore, the energy consumption and the cost of raw materials and energy are reduced. The powder suction port is formed in the outer side of the powder separating portion, and partial powder pushed away by the powder separating portion is sucked away by the powder suction port, so that the die frame is easier to insert powder, the resistance is smaller, the abrasion of the edge sharp edge of the die frame is reduced, and the die frame is driven by smaller energy to insert the powder. The contact of the mold frame and the transmission belt is tighter, and the pressure is prevented from dissipating from the powder at the lower part of the mold frame. The transmission band plays the function of powder feeding and adobe ejection of compact, can avoid the adobe to promote passively and exert an influence to the surface quality of adobe from its side, and the adobe density after the suppression is even, and surfacing, the yields is high.

Drawings

Fig. 1-4 are schematic structural views of 4 different embodiments of a forming mechanism of a prior brick press;

FIG. 5 is a schematic structural diagram of a first embodiment of a forming mechanism of a large-tonnage brick press of the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a cross-sectional view of a mold frame and a powder suction cap of the present invention;

FIG. 8 is a schematic structural view of a mold frame and a powder suction cover of the present invention;

fig. 9-11 are schematic diagrams of a forming method of the large-tonnage brick press of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.

As shown in fig. 5-8, the embodiment of the present invention provides a forming mechanism of a large-tonnage brick press, including a backing plate 1, a conveyor belt 2, a mold frame 3 and a mold core 4, where the conveyor belt 2 is disposed above the backing plate 1, the mold core 4 is sleeved in the mold frame 3, and the mold frame 3 is disposed above the conveyor belt 2; the backing plate 1 is used for providing support for the conveying belt 2 in the green brick forming process; the conveying belt 2 is used for conveying powder 9, is matched with the mold core 4, the mold frame 3 and the base plate 1 to press and mold green bricks, and sends out the molded green bricks; the mold frame 3 comprises a mold frame main body 31 and a powder separating part 32 arranged at the lower end of the mold frame main body 31, the powder separating part 32 is arranged at the position, close to a green brick, of the lower surface of the mold frame main body 31, and a powder sucking port 5 is arranged at the position, far away from the green brick, of the lower surface of the mold frame main body 31.

Wherein, the powder material separating part 32 comprises a vertical surface 321 facing the green brick and an inclined surface 322 facing away from the green brick, and the inclined surface 322 is gradually inclined to the green brick direction from top to bottom. The powder outlet 7 is covered with a powder suction cover 8, the powder suction cover 8 is connected with a powder suction pipe 6, the powder suction pipe 6 is connected with an exhaust fan and a powder collecting mechanism (not shown in the figure), the exhaust fan is used for generating negative pressure on the powder suction pipe 6, and the powder collecting mechanism is used for filtering powder taken out from the powder suction pipe 6 and collecting the powder. The lower end of the powder dividing part 32 may be a tip or a flat surface.

According to the scheme, the powder separating portion 32 is arranged on the mold frame 3, the powder separating portion 32 can push away powder outside the mold frame 3 forming cavity in the descending process of the mold frame 3, the mold frame 3 can be tightly attached to the transmission belt 2, the quality of the edge of a pressed green brick is improved, the green brick with the preset size can be obtained after pressing forming, and extra cutting is not needed. Because the allowance cut after pressing is not required to be reserved during material distribution, the powder amount during material distribution can be reduced, and the pressurizing area of the press is reduced. After the pressing area is reduced, the whole green brick is applied with lower pressure, so that the green brick can obtain the forming pressure consistent with the original pressure, and therefore, the energy consumption and the cost of raw materials and energy are reduced. The powder sucking port 5 is arranged on the outer side of the powder separating portion 32, and partial powder pushed away by the powder separating portion 32 is sucked away by the powder sucking port 5, so that the die frame 3 is easier to insert powder, the resistance is smaller, the abrasion of the edge sharp edge of the die frame 3 is reduced, and the die frame 3 is driven by smaller energy to insert the powder 9. In addition, as part of the powder pushed away by the powder separating part 32 is sucked away by the powder sucking port 5, the parallelism of the mold frame 3 relative to the conveying belt 2 is easy to guarantee, and the mold core 4 moves close to the inner wall of the mold frame 3, the parallelism of the mold core 4 relative to the conveying belt 2 can be improved at the same time, so that the pressure of the mold core 4 to the blank is more balanced, and the thickness of the finished blank is uniform. The contact of the mold frame 3 and the transmission belt 2 is tighter, and the pressure is prevented from dissipating from the powder at the lower part of the mold frame 3. The transmission band 2 plays the function of powder feeding and adobe ejection of compact, can avoid the adobe to promote passively and produce the influence to the surface quality of adobe from its side, and the adobe density after the suppression is even, and surfacing, the yields is high.

According to this application inhale the first embodiment of powder mouth 5, it is the round hole to inhale powder mouth 5, inhale powder mouth 5 and inhale powder passageway 51 and be connected, inhale powder passageway 51 and connect inhale powder mouth 5 and be located the play powder mouth 7 of framed main part 31 side. A plurality of round holes that set up alone do not influence each other with inhaling powder passageway 51, if a small amount of round holes or inhale powder passageway 51 and be blockked up, also can not influence holistic powder effect of inhaling, and station stability is high.

According to this application inhale the second embodiment of powder mouth 5, it is the bar hole to inhale powder mouth 5, inhale powder mouth 5 and the cross section and be connected for inhaling powder passageway 51 of bar together, inhale powder passageway 51 and connect inhale powder mouth 5 and be located the play powder mouth 7 of framed owner 31 side. The strip inhale powder mouth 5 and prevent stifled performance and more strengthen, the even suction along 3 borders of framed can be produced in the bar hole moreover, can inhale away the powder in the 3 outsides of framed neatly, and absorption efficiency is high, and the adjustment of suction direction is convenient.

Preferably, the powder suction ports 5 can be distributed below four sides of the mold frame 3, and powder on the four sides of the mold frame 3 is sucked in the process that the mold frame 3 extends into the powder 9. According to actual needs, the powder suction ports 5 can be only distributed below two long edges of the die frame 3, the powder which needs to be pushed away in the long edge direction of the die frame 3 is large, the powder suction ports 5 are arranged in the length direction of the die frame 3, the problem of powder accumulation in the die frame can be mainly solved, the structure of the die frame 3 is simplified, parts which need to be maintained are relatively few, and the use threshold is reduced.

Accordingly, a second embodiment of the present invention provides a molding method for a large-tonnage brick press, which molds powder material by using the molding mechanism of the large-tonnage brick press as described above; the method comprises the following steps:

(1) as shown in fig. 9, the powder 9 is uniformly distributed on the conveyor belt 2, the mold frame 3 descends, and the powder separating part 32 of the mold frame 3 is in contact with the powder 9 and gradually extends into the powder 9;

(2) as shown in fig. 10, after the powder partition 32 contacts the powder 9, the powder suction port 5 starts to suck the powder, and the mold frame 3 continues to descend;

(3) as shown in fig. 11, the end of the powder separating part 32 is lowered to the right position, the powder sucking port 5 stops sucking powder, and the mold core 4 is pressed down to start pressing until pressing is completed;

(4) after pressing is finished, demoulding is carried out, the mould core 4 and the mould frame 3 are lifted, and the green bricks are sent out through the conveying belt 2.

By adopting the method, the powder separating part 32 is arranged on the die frame 3, and the powder separating part 32 can push the powder outside the forming cavity of the die frame 3 away in the descending process of the die frame 3, so that the die frame 3 can be tightly attached to the conveying belt 2, the quality of the edge of the pressed green brick is improved, the powder amount in material distribution is reduced, the pressing area of a press is reduced, the energy consumption is reduced, and the cost of raw materials and energy is reduced. The powder sucking port 5 is arranged on the outer side of the powder separating portion 32, and partial powder pushed away by the powder separating portion 32 is sucked away by the powder sucking port 5, so that the die frame 3 is easier to insert powder, the resistance is smaller, the abrasion of the edge sharp edge of the die frame 3 is reduced, and the die frame 3 is driven by smaller energy to insert powder. The contact of the mold frame 3 and the transmission belt 2 is tighter, and the pressure is prevented from dissipating from the powder at the lower part of the mold frame 3. The transmission band 2 plays the function of powder feeding and adobe ejection of compact, can avoid the adobe to promote passively and produce the influence to the surface quality of adobe from its side, and the adobe density after the suppression is even, and surfacing, the yields is high.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (7)

1. A forming mechanism of a large-tonnage brick press is characterized by comprising a base plate, a conveying belt, a mold frame and a mold core, wherein the conveying belt is arranged above the base plate, the mold core is sleeved in the mold frame, and the mold frame is arranged above the conveying belt; the backing plate is used for providing support for the conveying belt in the green brick forming process; the conveying belt is used for conveying powder, is matched with the mold core, the mold frame and the base plate to press and mold green bricks, and sends out the molded green bricks; the die frame comprises a die frame body and a powder separating part arranged at the lower end of the die frame body, the powder separating part is arranged at the position, close to a green brick, of the lower surface of the die frame body, and a powder sucking port is arranged at the position, far away from the green brick, of the lower surface of the die frame body.

2. The forming mechanism for large-tonnage brick molding press of claim 1, wherein said powder dividing section comprises a vertical surface facing the green brick and an inclined surface facing away from the green brick, said inclined surface being inclined from top to bottom in the direction of the green brick.

3. The forming mechanism of a large-tonnage brick press as set forth in claim 2, wherein the powder suction port is a circular hole, the powder suction port is connected with a powder suction channel, and the powder suction channel is connected with the powder suction port and a powder outlet located on a side surface of the die frame body.

4. The forming mechanism of a large-tonnage brick press as set forth in claim 2, wherein the powder suction port is a strip-shaped hole, the powder suction port is connected with a powder suction passage having a strip-shaped cross section, and the powder suction passage is connected with the powder suction port and a powder outlet located at a side surface of the die frame body.

5. The forming mechanism of a large-tonnage brick press as defined in claim 3 or 4, wherein the powder outlet is covered with a powder suction hood, and the powder suction hood is connected with a powder suction pipe.

6. The forming mechanism of a large-tonnage brick press as set forth in claim 1, wherein the powder suction ports are distributed under four sides of the mold frame, or the powder suction ports are distributed only under two long sides of the mold frame.

7. A molding method of a large-tonnage brick molding press, which is characterized in that powder is molded by the molding mechanism of the large-tonnage brick molding press according to any one of claims 1 to 6; the method comprises the following steps:

(1) powder is uniformly distributed on the conveying belt, the die frame descends, and the powder separating part of the die frame is contacted with the powder and gradually extends into the powder;

(2) after the powder separating part contacts the powder, the powder sucking port starts to suck away the powder, and the die frame continuously descends;

(3) the end part of the powder separating part descends to the right position, the powder sucking port stops sucking powder, and the mold core is pressed downwards to start pressing until pressing is finished;

(4) and after pressing is finished, demolding, lifting the mold core and the mold frame, and conveying the green bricks out through a conveying belt.

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