CN111331709A - Pressing method for large-plate ceramic tile - Google Patents
Pressing method for large-plate ceramic tile Download PDFInfo
- Publication number
- CN111331709A CN111331709A CN202010319693.6A CN202010319693A CN111331709A CN 111331709 A CN111331709 A CN 111331709A CN 202010319693 A CN202010319693 A CN 202010319693A CN 111331709 A CN111331709 A CN 111331709A
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- pressing
- die
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- movable
- pressing method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
- B28B13/065—Removing the shaped articles from moulds by applying electric current or other means of discharging, e.g. pneumatic or hydraulic discharging means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0097—Press moulds; Press-mould and press-ram assemblies
Abstract
The invention provides a pressing method for a large-plate ceramic tile, which comprises the following steps: a material distribution step, in which powder is uniformly distributed in a die cavity enclosed by a movable die frame and a lower die core; pressing, namely driving an upper die to move downwards by a ceramic press, and pressing powder in a die cavity by the upper die; a step of discharging bricks, in which the ceramic press drives the upper die to move upwards and loosens the pressed and formed plate blank; and the movable die frame moves downwards to expose the slab on the upper surface of the movable die frame, and then the slab is pushed away from the upper surface of the lower die core and sent to the next process. The pressing method can effectively avoid the problem of deformation of the lower die core caused by multiple ejection and resetting, the forming die has better stability, the top surface of the lower die core can still keep higher planeness after multiple pressing, the planeness of the pressed plate blank is better, the plate blank of the large-plate ceramic tile is pressed by using the pressing method, the planeness stability of the plate blank is higher, and the product quality stability is better.
Description
Technical Field
The invention relates to the technical field of ceramic manufacturing, in particular to a pressing method for a large-plate ceramic tile.
Background
In the indoor wall decoration, ceramic tiles are generally used, in recent years, large-plate ceramic tiles (such as ceramic tiles with the specification of 1600 × 3600 mm) are more and more popular in the fields of tools and home decoration, in the production process of the ceramic tiles, powder needs to be put into a die to be pressed, for small-size ceramic tiles (such as ceramic tiles with the specification of 800 × 800 mm), the traditional pressing process is that a plate blank is ejected by a lower die core after the pressing is finished, then the plate blank is pushed away from the die and sent to the next process, but for large-plate ceramic tiles, the rigidity of the lower die core is reduced due to the fact that the size of the lower die core is large, if the plate blank is pressed by the traditional process, the lower die core is easy to bend after multiple ejection and reset actions, the lower die core plays a supporting role on the plate blank, when the lower die core bends, the pressed plate blank is also bent, and the flatness of the plate blank is seriously influenced.
Disclosure of Invention
The object of the present invention is to propose a pressing method for large-plate ceramic tiles, solving the above mentioned problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pressing method for large-board ceramic tiles comprising the steps of:
a material distribution step, in which powder is uniformly distributed in a die cavity enclosed by a movable die frame and a lower die core;
pressing, namely driving an upper die to move downwards by a ceramic press, and pressing powder in a die cavity by the upper die;
a step of discharging bricks, in which the ceramic press drives the upper die to move upwards and loosens the pressed and formed plate blank; and the movable die frame moves downwards to expose the slab on the upper surface of the movable die frame, and then the slab is pushed away from the upper surface of the lower die core and sent to the next process.
Preferably, in the pressing step, the pressure applied to the mold cavity by the ceramic press is not less than 30000 tons.
Preferably, a gap is arranged between the lower mold core and the movable mold frame, and air in the powder is exhausted from the gap in the pressing step.
Preferably, in the pressing step, the powder is pressed into a slab by means of isostatic pressing.
Preferably, in the brick discharging step, the downward moving speed of the movable mould frame does not exceed 3 m/min.
Preferably, after the brick discharging process, the following steps are further included:
and a resetting step, namely, the movable mould frame moves upwards and is reset to an initial position, and then the cloth step is executed again.
Preferably, the movable mould frame is driven by a hydraulic oil cylinder to move upwards or downwards.
Drawings
FIG. 1 is a schematic process diagram of a cloth step and a pressing step according to an embodiment of the present invention;
fig. 2 is a schematic process diagram of the brick discharging step and the resetting step according to an embodiment of the present invention.
In the drawings: 1-movable mould frame, 2-lower mould core, 3-upper mould, 4-powder material and 5-plate blank.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The pressing method for the large-plate ceramic tiles of the embodiment, as shown in fig. 1 and 2, comprises the following steps:
a material distribution step, wherein powder 4 is uniformly distributed in a die cavity enclosed by the movable die frame 1 and the lower die core 2;
pressing, namely driving an upper die 3 to move downwards by a ceramic press, and tightly pressing powder 4 in a die cavity by the upper die 3;
a brick discharging step, wherein the ceramic press drives the upper die 3 to move upwards, and the press-formed plate blank 5 is loosened; the movable mold frame 1 is moved downward to expose the slab 5 on the upper surface of the movable mold frame 1, and then the slab 5 is pushed away from the upper surface of the lower core 2 and sent to the next process.
When pressing green bricks, uniformly paving the powder 4 in a mold cavity, driving an upper mold 3 to move downwards by a movable beam of a ceramic press, and applying pressure to the powder 4 in the mold cavity through the upper mold 3 to press the powder 4 into a plate blank 5; after pressing is finished, the movable beam of the ceramic press drives the upper die 3 to move upwards, so that the upper die 3 loosens the pressed plate blank 5 and leaves the die cavity to reset; after the pressing is finished, the movable die frame 1 moves downwards until the upper surface of the movable die frame 1 is flush with the top surface of the lower die core 2, so that the pressed plate blank 5 is exposed out of the upper surface of the movable die frame 1, and then the plate blank 5 is pushed away and sent to the next process; in the whole process, the lower die core 2 is kept static, so that the problem of deformation of the lower die core 2 caused by multiple ejection and resetting can be effectively solved, the stability of the forming die is better, and the top surface of the lower die core 2 can still keep higher flatness after multiple pressing, so that the pressed slab 5 has better flatness, and the slab 5 of the large-plate ceramic tile is pressed by using the pressing method disclosed by the invention, so that the flatness stability of the slab 5 is higher, and the product quality stability is better.
Further, in the pressing step, the pressure applied to the mold cavity by the ceramic press is not less than 30000 tons.
Due to the large area of the large-plate ceramic tiles, in order to ensure the density of the slab 5 of the large-plate ceramic tiles, a pressure of not less than 30000 tons is required to be used for pressing the powder 4 in the die cavity, and preferably, the pressure applied by the ceramic press in the die cavity is 36000 tons.
Further, a gap is arranged between the lower mold core 2 and the movable mold frame 1, and air in the powder 4 is exhausted from the gap in the pressing step.
Because the powder 4 contains a large amount of gas, in the suppression step, if the gas in the powder 4 can not in time discharge, can cause great suppression resistance, set up the gap between lower mold core 2 and activity die frame 1, at the in-process of suppression, the air in the powder 4 can be followed the gap and discharged, thereby reduce the suppression resistance that the air caused, make the powder 4 can be suppressed more closely knit, the density of slab 5 is bigger, the firing in-process in later stage is difficult for taking place the deformation.
Further, in the pressing step, the powder 4 is pressed into the slab 5 by means of isostatic pressing.
The isostatic pressing mode is a molding method which utilizes incompressibility and uniform pressure transmission performance of a liquid medium, the isostatic pressing utilizes the fluid medium to transmit pressure, the pressure transmitted by the fluid medium is equal in all directions, therefore, the pressure borne by the powder 4 is basically consistent, no relative motion exists between the powder 4 and the upper die 3, the friction resistance between the powder 4 and the upper die is small, the pressure is only slightly reduced, the gradient of the density reduction is generally less than 1%, and therefore, the density of a pressed blank is more uniform.
Further, in the brick discharging step, the downward moving speed of the movable mould frame 1 does not exceed 3 m/min.
In the pressing step, the powder 4 is spread to the periphery after being pressed and transmits the pressure to the side wall of the mold cavity, so that after the pressing is completed, part of the powder 4 is adhered to the side wall of the mold cavity, and at this time, if the movable mold frame 1 moves downwards at a high speed, there is a certain probability that the periphery of the slab 5 is damaged, so that the speed of the movable mold frame 1 cannot exceed 3m/min during the downward movement, and preferably, the speed of the movable mold frame 1 during the downward movement is 2 m/min.
Further, after the brick discharging process, the method also comprises the following steps:
and a resetting step, namely, the movable mould frame 1 moves upwards and is reset to an initial position, and then the cloth step is executed again.
After the brick discharging step is completed, the movable mold frame 1 is reset to the initial position again to prepare for the next pressing process, and the process is continuously circulated, so that the powder 4 is continuously pressed into the slab 5.
Further, the movable mould frame 1 is driven by a hydraulic oil cylinder to move upwards or downwards.
The hydraulic oil cylinder can realize linear reciprocating motion, bear huge load and has a simple structure, the movable die frame 1 can be conveniently driven to move upwards or downwards by adopting the hydraulic oil cylinder, in addition, the hydraulic oil cylinder is more stable in the driving process, and the phenomenon that the plate blank 5 is damaged due to the shaking of the movable die frame 1 in the brick discharging step is avoided.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (7)
1. A pressing method for large-plate ceramic tiles, characterized by: the method comprises the following steps:
a material distribution step, in which powder is uniformly distributed in a die cavity enclosed by a movable die frame and a lower die core;
pressing, namely driving an upper die to move downwards by a ceramic press, and pressing powder in a die cavity by the upper die;
a step of discharging bricks, in which the ceramic press drives the upper die to move upwards and loosens the pressed and formed plate blank; and the movable die frame moves downwards to expose the slab on the upper surface of the movable die frame, and then the slab is pushed away from the upper surface of the lower die core and sent to the next process.
2. A pressing method for large-board ceramic tiles according to claim 1, characterised in that: in the pressing step, the pressure applied to the die cavity by the ceramic press is not less than 30000 tons.
3. A pressing method for large-board ceramic tiles according to claim 1, characterised in that: and a gap is arranged between the lower mold core and the movable mold frame, and in the pressing step, air in the powder is discharged from the gap.
4. A pressing method for large-board ceramic tiles according to claim 1, characterised in that: in the pressing step, the powder is pressed into a plate blank in an isostatic pressing mode.
5. A pressing method for large-board ceramic tiles according to claim 1, characterised in that: in the brick discharging step, the downward moving speed of the movable mould frame does not exceed 3 m/min.
6. A pressing method for large-board ceramic tiles according to claim 1, characterised in that: after the brick discharging process, the method further comprises the following steps:
and a resetting step, namely, the movable mould frame moves upwards and is reset to an initial position, and then the cloth step is executed again.
7. A pressing method for large-board ceramic tiles according to claim 6, characterized in that: the movable mould frame is driven by a hydraulic oil cylinder to move upwards or downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010319693.6A CN111331709A (en) | 2020-04-22 | 2020-04-22 | Pressing method for large-plate ceramic tile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010319693.6A CN111331709A (en) | 2020-04-22 | 2020-04-22 | Pressing method for large-plate ceramic tile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111331709A true CN111331709A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010319693.6A Pending CN111331709A (en) | 2020-04-22 | 2020-04-22 | Pressing method for large-plate ceramic tile |
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| CN (1) | CN111331709A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112757465A (en) * | 2020-12-23 | 2021-05-07 | 广东新一派建材有限公司 | Forming method of ceramic rock plate blank and ceramic rock plate blank |
| CN113829472A (en) * | 2021-09-09 | 2021-12-24 | 洛阳盛铁新材料科技有限公司 | Method for forming refractory brick with multi-directional force application characteristic and auxiliary device thereof |
| CN114454320A (en) * | 2022-03-08 | 2022-05-10 | 广东欧文莱陶瓷有限公司 | Grid positioning filling method for preparing thin rock plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112757465A (en) * | 2020-12-23 | 2021-05-07 | 广东新一派建材有限公司 | Forming method of ceramic rock plate blank and ceramic rock plate blank |
| CN113829472A (en) * | 2021-09-09 | 2021-12-24 | 洛阳盛铁新材料科技有限公司 | Method for forming refractory brick with multi-directional force application characteristic and auxiliary device thereof |
| CN113829472B (en) * | 2021-09-09 | 2022-09-27 | 洛阳盛铁新材料科技有限公司 | Method for forming refractory brick with multi-directional force application characteristic and auxiliary device thereof |
| CN114454320A (en) * | 2022-03-08 | 2022-05-10 | 广东欧文莱陶瓷有限公司 | Grid positioning filling method for preparing thin rock plate |
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Application publication date: 20200626 |