A molding die for large-plate ceramic tiles and a ceramic press using the same

Abstract

The present invention proposes a forming mold for large-plate ceramic tiles, which is applied to a ceramic press, and includes an upper mold, a lower mold assembly, a mold frame and a mold frame driving assembly; a mounting cavity is provided in the middle of the mold frame, and both ends of the mounting cavity are open; the lower mold assembly is fixedly arranged, and the lower mold assembly is located in the mounting cavity; the inner side wall of the mounting cavity and the top surface of the lower mold assembly form a mold cavity for placing powder; the mold frame driving assembly is connected to the mold frame driving, and the mold frame driving assembly is used to drive the mold frame to move up and down relative to the lower mold assembly; the upper mold is installed at the bottom of the moving beam of the ceramic press, and is located above the mold cavity, and the upper mold is used to move downward relative to the mold cavity to press the powder in the mold cavity, and to move upward relative to the mold cavity to release the pressed blank. The use of the present invention has the advantages of high product quality and longer service life of the forming mold.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic manufacturing equipment, in particular to a forming die for large-plate ceramic tiles and a ceramic press using the same. Background Art

[0002] Ceramic tiles are usually used in indoor wall decoration. In recent years, large-plate ceramic tiles (such as ceramic tiles with a specification of 1600×3600mm) have become more and more popular in the fields of industrial equipment and home decoration. In the production process of ceramic tiles, powder needs to be placed in a mold for pressing. For small-sized ceramic tiles (such as ceramic tiles with a specification of 800×800mm), the traditional forming mold is fixed with a mold frame. After the pressing is completed, the slab is ejected by the lower mold core, and then the slab is pushed away from the mold and sent to the next process. However, for large-plate ceramic tiles, due to the large size of the lower mold core, its rigidity will decrease. If a traditional forming mold is used for pressing, the lower mold core is prone to bending after multiple ejection and reset actions. The lower mold core supports the blank. When the lower mold core is bent, the pressed slab will also bend, which seriously affects the flatness of the slab. Summary of the invention

[0003] In view of the above-mentioned defects, the object of the present invention is to provide a forming mold for large-plate ceramic tiles and a ceramic press using the same.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A forming die for large-plate ceramic tiles, applied to a ceramic press, comprising an upper die, a lower die assembly, a die frame and a die frame driving assembly;

[0006] A mounting cavity is provided in the middle of the mold frame, and both ends of the mounting cavity are open;

[0007] The lower mold assembly is fixedly arranged and is located in the installation cavity; the inner side wall of the installation cavity and the top surface of the lower mold assembly form a mold cavity for placing powder;

[0008] The mold frame driving assembly is drivingly connected to the mold frame, and the mold frame driving assembly is used to drive the mold frame to move up and down relative to the lower mold assembly;

[0009] The upper mold is installed at the bottom of the movable beam of the ceramic press and is located above the mold cavity. The upper mold is used to move downward relative to the mold cavity to press the powder in the mold cavity, and to move upward relative to the mold cavity to release the pressed blank.

[0010] Preferably, locking male parts are provided on two opposite sides of the bottom of the mold frame; the mold frame driving assembly includes a locking female part, a lifting unit and a locking unit;

[0011] A protrusion is provided on one side of the lower end of the locking male part, and a sliding groove matching with the protrusion is provided on the side of the locking female part;

[0012] The locking unit is installed on the locking mother part, and the locking unit is used to press against the bottom surface of the mold frame to lock the protrusion and the slide groove, or to loosen from the bottom surface of the mold frame to loosen the protrusion and the slide groove;

[0013] The lifting unit is connected to the locking nut, and the lifting unit is used to drive the locking nut and the mold frame to move up and down relative to the lower mold assembly.

[0014] Preferably, the lower mold assembly includes a lower mold core, a lower magnetic base, a middle plate and a bottom plate, the lower mold core is arranged on the top surface of the lower magnetic base, the lower magnetic base is provided with a plurality of first electromagnetic coils, and the first electromagnetic coils can magnetically fix the upper mold when energized; the middle plate is fixed to the bottom surface of the lower magnetic base; the bottom plate is arranged on the press table, and the bottom plate is provided with a plurality of second electromagnetic coils, and the second electromagnetic coils can magnetically fix the middle plate when energized.

[0015] Preferably, the locking male component and the locking female component both extend along the length direction of the mold frame; the mold frame is provided with a plurality of through holes on both sides in the width direction, and the lower magnetic base is provided with a plurality of slots corresponding to the through holes on both sides in the width direction, and the through holes and the slots can be connected by external tools.

[0016] Preferably, the lower magnetic base includes a lower magnetic base body and a clamping plate, the lower magnetic base is provided with a plurality of clamping slots in the length direction thereof, the clamping plate is arranged in the clamping slots, and the clamping plate is provided with the slot.

[0017] Preferably, the mold frame includes two upper long boards, two upper short boards, two lower long boards and two lower short boards; the two ends of the bottom surface of the upper long board are respectively connected to the two lower short boards by screws; the bottom surface of the upper short board is connected to the top surface of the lower short board by screws; the bottom surface of the upper long board is connected to the bottom surface of the lower long board by screws.

[0018] Preferably, the mold frame further includes a side plate, the side plate is arranged on the inner side wall of the installation cavity, and the side plate and the lower mold assembly enclose the mold cavity.

[0019] Preferably, the side plate is made of cemented carbide.

[0020] Preferably, the lifting unit and the locking unit are hydraulic cylinders.

[0021] A ceramic press uses a forming die for large-plate ceramic tiles as described above.

[0022] The beneficial effects of the present invention are as follows: the structural design in which the lower mold core is fixed and the mold frame is movable can effectively avoid the deformation problem of the lower mold assembly due to multiple ejections and resets, and the stability of the molding mold is better. After multiple pressings, the top surface of the lower mold assembly can still maintain a high flatness, the flatness stability of the blank is higher, and the product quality stability is better. In addition, the molding mold of the present invention also has the advantage of not being easy to deform, which can better ensure the quality of the product and extend the life of the molding mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of one embodiment of a forming mold for large-plate ceramic tiles of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the lower magnetic base and the mold frame of the present invention;

[0025] Figure 3 It is a schematic diagram of the partial structure of the lower magnetic base of the present invention from the left side;

[0026] Figure 4 It is a schematic diagram of the exploded structure of the mold frame of the present invention.

[0027] In the accompanying drawings: 1-upper mold, 2-lower mold assembly, 21-lower mold core, 22-lower magnetic base, 221-first electromagnetic coil, 222-slot, 223-lower magnetic base body, 224-card plate, 23-middle plate, 24-bottom plate, 241-second electromagnetic coil, 3-mold frame, 31-installation cavity, 32-locking male part, 321-bump, 33-through hole, 34-side plate, 35-upper long plate, 36-upper short plate, 37-lower long plate, 38-lower short plate, 4-mold frame drive assembly, 41-locking female part, 411-slide groove, 42-locking unit. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and through specific embodiments. A forming mold for large-plate ceramic tiles, applied to a ceramic press, such as Figure 1 As shown, it includes an upper mold 1, a lower mold assembly 2, a mold frame 3 and a mold frame driving assembly 4;

[0029] A mounting cavity 31 is provided in the middle of the mold frame 3, and both ends of the mounting cavity 31 are open;

[0030] The lower mold assembly 2 is fixedly arranged and is located in the installation cavity 31; the inner side wall of the installation cavity 31 and the top surface of the lower mold assembly 2 form a mold cavity for placing powder;

[0031] The mold frame driving component 4 is drivingly connected to the mold frame 3, and the mold frame driving component 4 is used to drive the mold frame 3 to move up and down relative to the lower mold component 2;

[0032] The upper mold 1 is installed at the bottom of the movable beam of the ceramic press and is located above the mold cavity. The upper mold 1 is used to move downward relative to the mold cavity to press the powder in the mold cavity, and to move upward relative to the mold cavity to release the pressed blank.

[0033] The present invention innovatively adopts a structural design in which the lower mold core 21 is fixed and the mold frame 3 is movable. When pressing the green brick, the powder is first evenly spread in the mold cavity, and then the movable beam of the ceramic press drives the upper mold 1 to move downward, and applies pressure to the powder in the mold cavity through the upper mold 1 to press the powder into a green body; after the pressing is completed, the movable beam of the ceramic press drives the upper mold 1 to move upward, so that the upper mold 1 releases the pressed green body and leaves the mold cavity to reset; after the pressing is completed, the mold frame driving component 4 drives the mold frame 3 to move downward until the upper surface of the mold frame 3 is aligned with the lower mold component 2 The top surface of the lower mold assembly 2 is flush with that of the mold frame 3, so that the pressed body is exposed on the upper surface of the mold frame 3, and then the body is pushed away and sent to the next process; during the whole process, the lower mold assembly 2 remains stationary, thereby effectively avoiding the deformation problem of the lower mold assembly 2 due to multiple ejections and resets, and the stability of the molding mold is better. After multiple pressings, the top surface of the lower mold assembly 2 can still maintain a high flatness. Therefore, when the molding mold of the present invention is used to press the body of ceramic tiles, the flatness stability of the body is higher and the product quality stability is better.

[0034] In addition, in the process of producing traditional ceramic tiles, since the area of ​​traditional ceramic tiles is relatively small, the pressure of the ceramic press used in the pressing process is 1000-10000 tons, so a movable lower mold core 21 can be used to move the lower mold core 21 upward to eject the pressed body; however, for large-plate ceramic tiles, since the area of ​​large-plate ceramic tiles is larger, the pressure of the ceramic press when pressing the powder is several times or even dozens of times that of the traditional press, and the pressure during pressing can reach 36,000 tons. Therefore, the lower mold assembly 2 needs to withstand huge pressure during pressing. If the lower mold core 21 adopts a movable structure, after multiple pressings, the movable structure is easy to be damaged. The mold frame 3 with a movable structure will not be affected by the pressure of the ceramic press during the pressing process, so the precision of the repeated positioning of the mold frame 3 will not be affected, which can better ensure the quality of the product and extend the service life of the molding die.

[0035] Furthermore, the bottom of the mold frame 3 is provided with locking male parts 32 on two opposite sides; the mold frame driving assembly 4 includes a locking female part 41, a lifting unit and a locking unit 42;

[0036] A protrusion 321 is provided on one side of the lower end of the locking male component 32, and a sliding groove 411 cooperating with the protrusion 321 is provided on the side of the locking female component 41;

[0037] The locking unit 42 is installed on the locking female part 41, and the locking unit 42 is used to press against the bottom surface of the mold frame 3 to lock the protrusion 321 with the slide groove 411, or to release from the bottom surface of the mold frame 3 to release the protrusion 321 with the slide groove 411;

[0038] The lifting unit is connected to the locking nut 41 , and is used to drive the locking nut 41 and the mold frame 3 to move up and down relative to the lower mold assembly 2 .

[0039] The mold frame 3 and the mold frame driving assembly 4 are fixedly connected by the cooperation of the locking male part 32 and the locking female part 41. For the convenience of installation, there is a clearance fit between the protrusion 321 and the slide groove 411; when the locking male part 32 and the locking female part 41 are locked, the locking unit 42 is pressed against the bottom surface of the mold frame 3, that is, the locking unit 42 is pressed between the locking female part 41 and the bottom surface of the mold frame 3, so that the mold frame 3 and the locking male part 32 move upward a short distance, so that the slide groove 411 and the protrusion 321 are firmly fixed under the action of the pressing force of the locking unit 42, so as to achieve the effect of complete fixation between the locking female part 41 and the locking male part 32, and there will be no looseness in the process of the locking female part 41 driving the mold frame 3 to move up and down. When the mold frame 3 needs to be loosened from the locking mother part 41, it is only necessary to control the locking unit 42 to loosen the bottom surface of the mold frame 3. At this time, the slide groove 411 and the protrusion 321 are in a natural matching state, and the mold frame 3 can be easily disassembled and replaced.

[0040] Furthermore, the lower mold assembly 2 includes a lower mold core 21, a lower magnetic base 22, a middle plate 23 and a bottom plate 24, the lower mold core 21 is arranged on the top surface of the lower magnetic base 22, the lower magnetic base 22 is provided with a plurality of first electromagnetic coils 221, and the first electromagnetic coils 221 can magnetically fix the upper mold 1 when energized; the middle plate 23 is fixed to the bottom surface of the lower magnetic base 22; the bottom plate 24 is arranged on the press table, and the bottom plate 24 is provided with a plurality of second electromagnetic coils 241, and the second electromagnetic coils 241 can magnetically fix the middle plate 23 when energized.

[0041] The lower mold assembly 2 adopts a multi-layer structure, which can facilitate the production and transportation of the lower mold assembly 2 and effectively reduce the manufacturing and transportation costs of the lower mold assembly 2. In addition, since the lower mold core 21 is a component that is directly subjected to pressure, the lower mold core 21 is also the most susceptible to damage in the lower mold assembly 2. By adopting a multi-layer structure, when the lower mold core 21 is damaged, it is only necessary to directly replace the lower mold core 21, while the lower magnetic base 22, the middle plate 23 and the bottom plate 24 do not need to be replaced, which can effectively save the cost of repair and maintenance. The lower mold core 21 and the lower magnetic base 22 are fixed by the first electromagnetic coil 221. Since screws are not required for fixing, the lower mold core 21 is The top surface of 21 can maintain a complete plane, so that there will be no protrusions 321 on the surface of the pressed brick, which is beneficial to the subsequent process; as for the bottom plate 24 and the middle plate 23, the bottom plate 24 is fixed to the press table of the ceramic press by screws, and then the bottom plate 24 sucks and fixes the middle plate 23 through the second electromagnetic coil 241, thereby fixing the lower mold core 21 and the lower magnetic seat 22; this arrangement can easily remove the lower mold core 21, the lower magnetic seat 22 and the middle plate 23 from the bottom plate 24 as a whole, without the need to disassemble the lower mold core 21, the lower magnetic seat 22, the middle plate 23 and the bottom plate 24, which can effectively improve the efficiency of replacing and repairing the molding mold.

[0042] Furthermore, the locking male component 32 and the locking female component 41 both extend along the length direction of the mold frame 3; Figure 2 As shown, the mold frame 3 is provided with a plurality of through holes 33 on both sides in the width direction, and the lower magnetic base 22 is provided with a plurality of slots 222 corresponding to the through holes 33 on both sides in the width direction, and the through holes 33 and the slots 222 can be connected by external tools.

[0043] The size and weight of the molding mold of the present invention are relatively large. Its length can reach 5.3 meters, its width can reach 2.6 meters, and its weight can reach 70 tons. In addition, due to the limitation of the internal space of the ceramic press, there are certain difficulties in installing and disassembling the molding mold of the invention. The present invention is provided with a plurality of through holes 33 and slots 222 that can be connected by external tools. When installing the molding mold, the base plate 24 is first installed on the press table of the ceramic press, and then external tools are respectively inserted into the plurality of through holes 33, wherein the external tool can be a connecting shaft, which passes through the through hole 33 and is inserted into the slot 222, so that the mold frame 3 is connected to the lower mold core 21, the lower magnetic seat 22 and the middle plate 23 into a whole, and then the whole consisting of the mold frame 3, the lower mold core 21, the lower magnetic seat 22 and the middle plate 23 is installed in the ceramic press. During installation, first use The protrusion 321 is inserted into the slide groove 411 along its length direction, and then the slide groove 411 is used as a guide rail to slowly push the mold frame 3, the lower mold core 21, the lower magnetic seat 22 and the middle plate 23 into the interior of the ceramic press, and then the connecting shaft is taken out from the through hole 33. Finally, the first electromagnetic coil 221 is energized to lock the lower mold core 21 and the lower magnetic seat 22, and the second electromagnetic coil 241 is energized to lock the middle plate 23 and the bottom plate 24. The locking unit 42 is pressed against the bottom surface of the mold frame 3 to lock the locking male part 32 and the locking female part 41, thereby completing the installation of the molding mold.

[0044] Similarly, when removing the forming mold from the ceramic press, first disconnect the first electromagnetic coil 221 to prevent electric shock, and disconnect the circuit of the second electromagnetic coil 241 to loosen the bottom plate 24 and the middle plate 23, and then control the locking unit 42 to loosen from the bottom surface of the mold frame 3, so that the locking male part 32 and the locking female part 41 are relaxed to a naturally matched state; then insert the connecting shafts into the several through holes 33 respectively, and insert the connecting shafts into the slots 222 through the through holes 33, so that the mold frame 3 and the lower mold core 21, the lower magnetic seat 22 and the middle plate 23 are connected into a whole, and then use the slide groove 411 as a guide rail to slowly push the whole composed of the mold frame 3, the lower mold core 21, the lower magnetic seat 22 and the middle plate 23 out of the inside of the ceramic press, and finally, remove the bottom plate 24 from the press table of the ceramic press plate to complete the disassembly of the forming mold.

[0045] Furthermore, if Figure 2 and 3 As shown, the lower magnetic base 22 includes a lower magnetic base body 223 and a clamping plate 224 . The lower magnetic base 22 is provided with a plurality of clamping openings in its length direction. The clamping plate 224 is disposed in the clamping openings. The clamping plate 224 is provided with the slot 222 .

[0046] During the installation and disassembly process, the lower magnetic base 22 is connected to the mold frame 3 through an external tool. The slot 222 of the lower magnetic base 22 is subjected to huge pressure during the installation and disassembly process, so the slot 222 is easily damaged. The present invention sets the slot 222 on the card plate 224. On the one hand, the force-bearing area of ​​the lower magnetic base 22 during the installation and disassembly process can be increased and the pressure at the card mouth can be reduced. On the other hand, when the slot 222 is damaged due to force, the corresponding card plate 224 can be directly replaced, and the maintenance cost is lower.

[0047] Furthermore, if Figure 4 As shown, the mold frame 3 includes two upper long boards 35, two upper short boards 36, two lower long boards 37 and two lower short boards 38; the two ends of the bottom surface of the upper long board 35 are respectively connected with the two lower short boards 38 by screws; the bottom surface of the upper short board 36 is connected with the top surface of the lower short board 38 by screws; the bottom surface of the upper long board 35 is connected with the bottom surface of the lower long board 37 by screws.

[0048] Since the overall size of the mold frame 3 is relatively large, the use of a split structure can help reduce the production cost of the mold frame 3, and it is also easier to repair when the mold frame 3 is partially damaged, and the maintenance cost is lower.

[0049] Furthermore, if Figure 1 As shown, the mold frame 3 further includes a side plate 34 , and the side plate 34 is disposed on the inner wall of the installation cavity 31 , and the side plate 34 and the lower mold assembly 2 enclose the mold cavity.

[0050] During the pressing process, the inner wall of the mold cavity needs to follow the lateral pressure. After multiple pressings, the inner wall of the mold cavity is prone to wear and tear. Therefore, a side panel 34 is provided on the inner wall of the mounting cavity 31. The side panel 34 is used to surround the inner wall of the mold cavity. When the side panel 34 is worn, it is only necessary to directly replace the side panel 34, thereby further reducing the maintenance cost. In addition, since the hardness requirement of the inner wall of the mold cavity is relatively high, the side panel 34 is used to surround the inner wall of the mold cavity. It is only necessary to ensure the hardness of the side panel 34, and the other parts of the mold frame 3 do not need to use high-hardness materials. This can effectively reduce the manufacturing cost of the mold frame 3.

[0051] Furthermore, the side plate 34 is made of hard alloy.

[0052] Furthermore, the lifting unit and the locking unit 42 are hydraulic cylinders.

[0053] The hydraulic cylinder can realize linear reciprocating motion, bear huge loads and has a simple structure. The jacking unit and the locking unit 42 both use hydraulic cylinders to make the overall structure more compact while meeting the load requirements.

[0054] A ceramic press is characterized by using a forming mold for large-plate ceramic tiles as described above.

[0055] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A forming die for large-plate ceramic tiles, applied to a ceramic press, characterized in that: It includes an upper mold, a lower mold assembly, a mold frame and a mold frame driving assembly; A mounting cavity is provided in the middle of the mold frame, and both ends of the mounting cavity are open; The lower mold assembly is fixedly arranged and is located in the installation cavity; the inner side wall of the installation cavity and the top surface of the lower mold assembly form a mold cavity for placing powder; The mold frame driving assembly is drivingly connected to the mold frame, and the mold frame driving assembly is used to drive the mold frame to move up and down relative to the lower mold assembly; The upper die is installed at the bottom of the movable beam of the ceramic press and is located above the die cavity. The upper die is used to move downward relative to the die cavity to press the powder in the die cavity, and to move upward relative to the die cavity to release the pressed green body. The bottom of the mold frame is provided with locking male parts on two opposite sides; the mold frame driving assembly includes a locking female part, a lifting unit and a locking unit; The lower mold assembly includes a lower mold core, a lower magnetic seat, a middle plate and a bottom plate, wherein the lower mold core is arranged on the top surface of the lower magnetic seat, and the lower magnetic seat is provided with a plurality of first electromagnetic coils, which can fix the upper mold by magnetic attraction when the first electromagnetic coils are energized; the middle plate is fixed to the bottom surface of the lower magnetic seat; the bottom plate is arranged on the press table, and the bottom plate is provided with a plurality of second electromagnetic coils, which can fix the middle plate by magnetic attraction when the second electromagnetic coils are energized; The locking male part and the locking female part both extend along the length direction of the mold frame; the mold frame is provided with a plurality of through holes on both sides in the width direction, and the lower magnetic base is provided with a plurality of slots corresponding to the through holes on both sides in the width direction, and the through holes and the slots can be connected by an external tool; The lower magnetic base includes a lower magnetic base body and a clamping plate, the lower magnetic base is provided with a plurality of clamping openings in the length direction thereof, the clamping plate is arranged in the clamping openings, and the clamping plate is provided with the slot; The mold frame further includes a side plate, and the side plate is arranged on the inner side wall of the installation cavity.

2. A forming mold for large-plate ceramic tiles according to claim 1, characterized in that: A protrusion is provided on one side of the lower end of the locking male part, and a sliding groove matching with the protrusion is provided on the side of the locking female part; The locking unit is installed on the locking mother part, and the locking unit is used to press against the bottom surface of the mold frame to lock the protrusion and the slide groove, or to loosen from the bottom surface of the mold frame to loosen the protrusion and the slide groove; The lifting unit is connected to the locking nut, and the lifting unit is used to drive the locking nut and the mold frame to move up and down relative to the lower mold assembly.

3. The forming mold for large-plate ceramic tiles according to claim 1, characterized in that: The mold frame includes two upper long boards, two upper short boards, two lower long boards and two lower short boards; the two ends of the bottom surface of the upper long board are respectively connected to the two lower short boards by screws; the bottom surface of the upper short board is connected to the top surface of the lower short board by screws; the bottom surface of the upper long board is connected to the bottom surface of the lower long board by screws.

4. A forming mold for large-plate ceramic tiles according to claim 1, characterized in that: The side plate and the lower mold assembly enclose the mold cavity.

5. The forming mold for large-plate ceramic tiles according to claim 1, characterized in that: The side plate is made of hard alloy.

6. A forming mold for large-plate ceramic tiles according to claim 2, characterized in that: The lifting unit and the locking unit are hydraulic cylinders.

7. A ceramic press, characterized in that: Use a forming mold for large-plate ceramic tiles as described in any one of claims 1-6.

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