An apparatus for the press forming of artificial stone

Abstract

The application discloses a kind of equipment of artificial stone press forming, including pressure head, buffer device, vacuum box and rolling device, vacuum box top is equipped with an opening, pressure head is set at the opening of vacuum box, buffer device is set between vacuum box and pressure head, buffer device is used to adjust the position of pressure head according to the vacuum degree in vacuum box, and rolling device is set at the bottom of pressure head, and rolling device is used to roll pressure artificial stone, the embodiment of the application can combine two steps of vacuum degassing and rolling compaction, convert vacuum negative pressure into beneficial applied compaction force by structural design, while also reducing vacuum working volume space, greatly improve the production efficiency and effect of vacuum press forming process, realize capacity substantial improvement.

Description

Technical Field

[0001] This invention relates to the field of artificial stone production technology, and in particular to a device for pressing and molding artificial stone. Background Technology

[0002] The manufacturing process of artificial stone involves taking one or more types of stone or stone-like granular materials with selected particle sizes, powders, and binders, and processing them through steps such as batching, stirring, mixing, spreading, pressing, and hardening to form a blank with the physical and chemical properties of stone, which is then processed into artificial stone products. The pressing process is a crucial step in preparing the artificial stone blank. Its function is to compact the loose blank with its preliminary geometric shape, applied to a support, under a vacuum environment, expelling gas and giving the blank a denser structure and accurate dimensions. In this step, a conveyor first transports the support and the loose blank with its preliminary geometric shape to the pressing machine station. A vacuum chamber covers the loose blank, and a vacuum is drawn to remove gas. When the vacuum reaches a set range, the press head descends and applies pressure to the loose blank, performing a rolling action. After a certain working time, the operation stops, and gas is introduced to break the vacuum. Then, the press head is raised and the vacuum chamber is opened, finally sending the compacted blank to the next process. The vacuuming, degassing, and pressurization processes are the longest, determining the overall production efficiency and serving as the core factor limiting the production capacity of the entire line. As the industry develops, manufacturers are increasingly eager to improve production efficiency, reduce energy consumption, and lower costs by enhancing technology in order to maintain their competitiveness. Therefore, this new type of pressing equipment was researched and invented to address these needs. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a device for pressing and molding artificial stone, which combines vacuum degassing and rolling compaction steps. Through structural design, the vacuum negative pressure is converted into a beneficial applied pressure force, while also reducing the vacuum working volume space, greatly improving the production efficiency and effect of the vacuum pressing and molding process, and achieving a significant increase in production capacity.

[0004] An embodiment of the present invention provides an apparatus for pressing and molding artificial stone, comprising a pressing head, a buffer device, a vacuum chamber, and a rolling device. The vacuum chamber has an opening at its top, the pressing head is disposed at the opening of the vacuum chamber, the buffer device is disposed between the vacuum chamber and the pressing head, and the buffer device is used to adjust the position of the pressing head according to the vacuum level in the vacuum chamber. The rolling device is disposed at the bottom of the pressing head and is used to roll the artificial stone.

[0005] An apparatus for pressing and molding artificial stone according to an embodiment of the present invention has at least the following beneficial effects:

[0006] In existing pressing and molding processes, the vacuum chamber needs to be evacuated first to create a vacuum environment, i.e., a vacuum degassing step. During this process, lifting devices such as cylinders or hydraulic cylinders are used to provide additional pulling force to the press head to counteract the negative pressure applied to the press head inside the vacuum chamber, preventing the press head from contacting the material to be pressed before the vacuum level in the vacuum chamber reaches the preset range, thus affecting the pressing effect. Only after the vacuum degassing step is completed can the subsequent rolling compaction step be carried out. The time spent on vacuum degassing and rolling compaction is excessive. In contrast, the artificial stone pressing and molding equipment of the present invention adjusts the position of the press head according to the vacuum level in the vacuum chamber during the vacuum degassing step through a buffer device: as the vacuum level in the vacuum chamber increases, the press head is pulled down by the negative pressure, and the height of the press head's downward movement is adjusted by the buffer device. Then, when the vacuum level in the vacuum chamber increases to the preset range, the press head has also moved down to the preset position. Finally, the material to be pressed is rolled by a rolling device, and after rolling for a certain period of time, the rolling compaction step is completed. It is understood that, compared with the pressing equipment of the prior art, the pressing equipment of the present invention does not require additional kinetic energy to perform the vacuum degassing stage, and since the pressing head has been pressed down to the preset position during the vacuum degassing stage, the rolling compaction time of the pressing equipment of the present invention is short.

[0007] Optionally, in one embodiment of the present invention, Formula 1 is... F1 is the negative pressure force applied to the pressure head by the vacuum chamber when the gas inside the vacuum chamber is extracted; G is the gravity on the pressure head; F2 is the buffering force generated by the buffer device on the pressure head when the gas inside the vacuum chamber is extracted; M is the contact area between each part of the rolling device used for rolling and the artificial stone; and K is the resulting pressure.

[0008] Optionally, in one embodiment of the present invention, the buffer device includes: an elastic element, a piston rod, a piston, and a barrel. The piston is disposed in the barrel, and both ends of the piston are respectively connected to the piston and the pressure head. The elastic element is disposed between the pressure head and the barrel and sleeved on the piston rod. The barrel is divided into a first cavity and a second cavity by the piston. The piston is also provided with a first port and a second port. The first port communicates with the first cavity, and the second port communicates with the second cavity.

[0009] Optionally, in one embodiment of the present invention, a first fluid valve is provided on the first fluid port, and a second fluid valve is provided on the second fluid port.

[0010] Optionally, in one embodiment of the present invention, the rolling device includes a rolling power mechanism, a roller group, and a roller group mounting frame. The rolling power mechanism is connected to the roller group mounting frame, the roller group mounting frame is disposed above the roller group, and the roller group is mounted on the roller group mounting frame.

[0011] Optionally, in one embodiment of the present invention, the roller group includes a work roller and a support roller corresponding to the work roller.

[0012] Optionally, in one embodiment of the present invention, a vibration mechanism is provided on the pressure head and / or the vacuum chamber.

[0013] Optionally, in one embodiment of the present invention, the vacuum chamber is an integral structure or a split structure.

[0014] Optionally, in one embodiment of the invention, the device further includes a carrier for supporting the artificial stone.

[0015] Optionally, in one embodiment of the present invention, the device further includes a first feeding device and a second feeding device. The first feeding device is provided with a lifting mechanism and a first traveling mechanism, and the second feeding device includes a second traveling mechanism. The first feeding device is used to feed the carrier into the vacuum chamber, and the second feeding device is used to transport the carrier out of the vacuum chamber. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0017] Figure 1 This is a schematic diagram of the specific structure of an artificial stone pressing and molding equipment according to an embodiment of the present invention, which has an integral vacuum chamber structure.

[0018] Figure 2 This is a schematic diagram of the specific structure of an artificial stone pressing and molding device according to an embodiment of the present invention, where the vacuum chamber has a split structure.

[0019] Figure 3 This is a schematic diagram of the specific structure of a buffer device according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the rolling part of the rolling device according to an embodiment of the present invention;

[0021] Figure 5This is a side view of the rolling portion of the rolling device according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the specific structure of the rolling device according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the material feeding process in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of a feeding process according to an embodiment of the present invention.

[0025] Figure label:

[0026] Pressure head 110; buffer device 120; elastic element 121; piston 122; piston rod 123; barrel body 124; first cavity 1241; second cavity 1242; first fluid inlet 1243; second fluid inlet 1244; vacuum chamber 130; sealing door 131; sealing element 132; vacuum chamber lifting power mechanism 133; rolling device 140; rolling power mechanism 141; roller group mounting base frame 142; roller group 143; working roller 1431; support roller 1432; load 150; first feeding device 160; lifting mechanism 161; first traveling mechanism 162; second feeding device 170; second traveling mechanism 171. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] Understandably, the steps involved in the pressing process of artificial stone using existing technology are as follows: First, a conveyor transports the load and loose blanks with preliminary geometric shapes to the pressing machine station. A vacuum chamber covers the loose blanks and performs vacuuming and degassing. When the vacuum level in the chamber reaches a set range, the press head descends and applies pressure to the loose blanks, performing rolling action. After a certain working time, the process stops, the vacuum is restored, the press head is raised, the vacuum chamber is opened, and finally, the pressed and compacted blanks are sent to the next process. In this step, the vacuuming, degassing, and pressurizing processes take too much time, hindering production efficiency, energy conservation, and cost reduction.

[0029] Based on this, refer to Figure 1This invention provides an artificial stone pressing and molding device, including a pressing head 110, a buffer device 120, a vacuum chamber 130, and a rolling device 140. The top of the vacuum chamber 130 is provided with an opening, the pressing head 110 is disposed at the opening of the vacuum chamber 130, the buffer device 120 is disposed between the vacuum chamber 130 and the pressing head 110, and the buffer device 120 is used to adjust the position of the pressing head 110 according to the vacuum degree in the vacuum chamber 130. The rolling device 140 is disposed at the bottom of the pressing head 110 and is used to roll the artificial stone.

[0030] Furthermore, such as Figure 1 As shown, an embodiment of the present invention provides an artificial stone pressing and molding equipment, which has at least the following beneficial effects:

[0031] In an embodiment of the present invention, an artificial stone pressing and molding device, after the carrier 150 is delivered to the pressing machine station, and the loose blank is covered by the vacuum chamber 130, during vacuum degassing, as the vacuum degree inside the vacuum chamber 130 increases, the pulling force formed by the negative pressure inside the vacuum chamber also increases. Under the action of the negative pressure pulling force and its own weight, the press head 110 overcomes the buffer force provided by the buffer device 120 and moves downward. As the vacuum degree increases, the descent of the press head 110 also increases. When the vacuum degree inside the vacuum chamber reaches a preset range, the press head 110 also moves down to a predetermined position. The press head 110 applies pressure to the loose blank, and the loose blank is rolled by the rolling device 140. After a certain working time, the rolling compaction stage is completed. In the subsequent air filling vacuum stage, as the vacuum degree inside the vacuum chamber decreases, the press head 110 is moved upward by the buffer device 120. When the vacuum degree inside the vacuum chamber decreases to a preset range, the press head 110 also moves upward to the initial position. Based on the above discussion, it can be understood that, compared with the existing pressing and molding equipment, the artificial stone pressing and molding equipment of this embodiment can adjust the height of the pressing head 110 during vacuum degassing, that is, while the negative pressure pulls the pressing head 110 down, by means of the buffer device 120. This allows the pressing head 110 to slowly move down as the negative pressure pull increases, which can save the time of subsequent rolling compaction. On the other hand, during vacuum degassing, the existing pressing and molding equipment needs to apply a certain pulling force to the pressing head 110 to prevent the pressing head 110 from pressing down on the loose blank before the vacuum environment in the vacuum chamber is ready. If the vacuum environment in the vacuum chamber is not ready, the pressing head 110 pressing down on the loose blank will affect the compaction effect of the blank. On the other hand, after the vacuum degassing process, existing technologies require additional kinetic energy from lifting devices such as cylinders or hydraulic cylinders to press the pressure head 110 down to a preset position. Those skilled in the art will understand that the artificial stone pressing and molding equipment of this embodiment does not require additional lifting devices to provide additional kinetic energy during the pressing process of the pressure head 110, thus resulting in low energy consumption. Furthermore, because the pressure head 110 of this embodiment gradually presses down according to the increasing vacuum level within the vacuum chamber 130 via the buffer device 120, and reaches the preset position when the vacuum level in the vacuum chamber 130 increases to a set range, while existing pressing equipment requires moving down to the predetermined position only after vacuum degassing, the vacuum working volume of the pressing equipment of this embodiment is smaller than that of existing pressing machines. Therefore, it can be understood that the pressing equipment of this embodiment can save time in the rolling compaction process, converting vacuum negative pressure into beneficial pressure force through structural design, while also reducing the vacuum working volume space, greatly improving the production efficiency and effect of the vacuum pressing and molding process, and achieving a significant increase in production capacity.

[0032] Furthermore, it is understood that in one embodiment of the present invention, as Figure 1 As shown, there are four buffer devices 120, distributed at the four corners of the pressure head 110. Each buffer device 120 is an elastic element 121, which can be any ordinary spring, air spring, or other elastic body with buffering function; this invention does not impose any limitations on this. Furthermore, in this embodiment, before the vacuum degassing stage, the force on the pressure head 110 is the resultant force of its own weight and the elastic force provided by the four elastic elements 121, i.e., the buffering force. At this time, the force on the elastic elements 121 is a component of the pressure head 110's own weight, and under the action of this component, a certain deformation occurs, denoted as x1. Under the action of the resultant force of the elastic forces provided by the four elastic elements 121, the pressure head 110 remains stationary in its initial position. During the vacuum degassing stage, a negative pressure pulling force is applied to the pressure head 110 inside the vacuum chamber 130, and this negative pressure pulling force gradually increases as the vacuum level gradually increases. Under the action of negative pressure and its own weight, the pressure head 110 moves downward against the resultant force of the elastic force provided by the four elastic elements 121. Under the action of negative pressure and the weight of the pressure head 110 itself, the deformation of the four elastic elements 121 increases. The deformation of the four elastic elements 121 reaches its maximum when the vacuum degree in the vacuum chamber 130 reaches the preset range, that is, when the pressure head 110 has moved to the preset position. The deformation at this time is denoted as x2, x2>x1. After the rolling compaction stage, during the inflation and vacuum breaking stage, the negative pressure force generated inside the vacuum chamber 130 on the pressure head 110 will gradually decrease until it becomes 0. Under the combined force of the elastic forces provided by the four elastic elements 121, the pressure head 110 overcomes the negative pressure force and its own gravity and moves upward. When the vacuum degree is 0, that is, when the negative pressure force is 0, since the elastic elements 121 are only subjected to the component of the gravity of the pressure head 110, the deformation of the four elastic elements 121 will become x1 again, and the pressure head 110 returns to its initial position.

[0033] As can be understood from the above discussion, in the vacuum degassing stage of the artificial stone pressing and molding equipment in this embodiment, as the vacuum level inside the vacuum chamber 130 increases, i.e., the negative pressure increases, the four elastic elements 121 deform, and the elastic force increases. However, it is conceivable that the resultant force of the elastic force generated by the four elastic elements 121 is less than the combined force of the negative pressure plus the weight of the press head 110 itself. Furthermore, the downward pressure obtained by subtracting the resultant force of the elastic force generated by the four elastic elements 121 from this combined force increases with the increase of vacuum level. Therefore, the press head 110 begins to move downward, and when the vacuum level reaches the predetermined value... After the range is reached, the pressure head 110 also moves down to the preset position, and the value of the downward pressure reaches the preset target value. At this time, the deformation of the four elastic elements 121 is also the greatest. In the inflation and vacuum breaking stage, as the vacuum degree inside the vacuum box 130 decreases, that is, the negative pressure pull decreases, the four elastic elements 121 slowly recover from the deformation. Under the action of the resultant force of the elastic force of the four elastic elements 121, the pressure head 110 moves up. When the vacuum degree is 0, that is, the negative pressure pull is 0, the four elastic elements 121 are only subjected to the component force of the gravity of the pressure head 110, and the deformation of the four elastic elements 121 will return to x1. Therefore, the artificial stone pressing and molding equipment of this embodiment can, before the vacuum degassing stage, use the elastic element 121 (buffer device 120) to keep the pressing head 110 in the initial position. During the vacuum degassing stage, the pressing head 110 can be allowed to slowly descend to the preset position as the vacuum level increases. Conversely, during the inflation and vacuum breaking stage, the pressing head 110 can be allowed to slowly rise to the initial position as the vacuum level decreases. Compared to the prior art, which requires the vacuum level in the vacuum chamber 130 to reach a preset range before the pressing head 110 reaches the preset position during the vacuum degassing stage, this embodiment has a shorter rolling compaction time. Furthermore, comparing this embodiment with the prior art, the prior art requires controlling a cylinder or hydraulic cylinder to maintain the pressing head 110 in the initial position before the vacuum level in the vacuum chamber 130 reaches the preset range, and then controlling the cylinder or hydraulic cylinder to lower the pressing head 110 after the vacuum level in the vacuum chamber 130 reaches the preset range. In contrast, the artificial stone pressing and molding equipment of this embodiment allows the pressing head 110 to descend smoothly during the vacuum degassing stage. At the same time, the pressure head 110 can gradually descend as the vacuum level increases, turning the negative pressure tension into beneficial pressure. Furthermore, it does not require controlling the cylinder or hydraulic cylinder to descend the pressure head 110, thus eliminating the need to consume additional kinetic energy. Similarly, in the process of inflating and breaking the vacuum, the prior art requires controlling the cylinder or hydraulic cylinder to raise the pressure head 110 back to its initial position. However, the artificial stone pressing and molding equipment in this embodiment does not require controlling the cylinder or hydraulic cylinder to raise the pressure head 110. It only needs to utilize the elastic potential energy stored in the four elastic elements 121 during the vacuum degassing process to return the pressure head 110 to its initial position, resulting in lower energy consumption.

[0034] It is conceivable that the selection of the elastic element 121 in this embodiment can be based on Formula 1, which is: Wherein, F1 is the negative pressure force applied to the pressure head 110 by the vacuum chamber 130 when the gas inside the vacuum chamber 130 is extracted, G is the gravity on the pressure head 110, F2 is the buffering force generated by the buffer device 120 on the pressure head 110 when the gas inside the vacuum chamber 130 is extracted, M is the contact area between each part of the rolling device 140 used for rolling work and the artificial stone, and K is the resulting pressure. It is understandable that, given that K is the preset target pressure, and that G, M, the preset vacuum level, and the vacuum area of ​​the vacuum chamber 130 are known, the value of F1 can be obtained by multiplying the preset vacuum level by the vacuum area inside the vacuum chamber 130. Then, the value of the buffer force F2 can be obtained based on the known G, M, and F1. After obtaining the buffer force F2, those skilled in the art can determine the target elastic coefficient of the elastic element 121 based on the set target deformation, i.e., the height to which the pressure head 110 descends. If the height to which the pressure head 110 descends is small, an elastic element 121 with a larger elastic coefficient can be selected. If the height to which the pressure head 110 descends is large, an elastic element 121 with a lower elastic coefficient can be selected.

[0035] Furthermore, referring to Figure 3 In order to better control the movement speed of the pressure head 110, Figure 1The buffer device 120 may include: an elastic element 121, a piston 122, a piston rod 123, and a barrel 124. The piston 122 is disposed inside the barrel 124. The two ends of the piston rod 123 are connected to the piston 122 and the pressure head 110, respectively. The elastic element 121 is disposed between the pressure head 110 and the barrel 124 and sleeved on the piston rod 123. The barrel 124 is divided into a first cavity 1241 and a second cavity 1242 by the piston 122. The barrel 124 is also provided with a first fluid inlet 1243 and a second fluid inlet 1244. The first fluid inlet 1243 communicates with the first cavity 1241, and the second fluid inlet 1244 communicates with the second cavity 1242. It is worth noting that in this embodiment, the fluid in the first cavity 1241 and the fluid in the second cavity 1242 are the same fluid with the same density, and the fluid can be either a gas or a liquid. Those skilled in the art can choose between gas or liquid according to actual needs. For example, to save volume in the container 124, a liquid can be used, since commonly used industrial hydraulic pressure is 0-30 MPa and commonly used industrial gas pressure is 0-0.75 MPa. Therefore, those skilled in the art can understand that the volume of the container 124 using liquid is smaller than the volume of the container 124 using gas. Alternatively, gas can be used to save costs and for environmental reasons. This embodiment of the invention does not impose any limitations on this, and those skilled in the art can choose for themselves. It is conceivable that when the piston 122 is connected to the pressure head 110, and the fluid volume in the first chamber 1241 is greater than the fluid volume in the second chamber 1242, the piston 122 experiences a supporting force; when the fluid volume in the first chamber 1241 is less than the fluid volume in the second chamber 1242, the piston 122 experiences a downward pressure.

[0036] Furthermore, in this embodiment, before the vacuum degassing stage, the force on the pressure head 110 is its own weight, the combined force of the elastic force provided by the four elastic elements 121 and the supporting force provided by the four pistons 122, i.e., the buffer force. At this time, the force on the elastic element 121 is the combined force of the component of the pressure head 110's own weight minus the supporting force provided by the pistons 122, and a certain deformation occurs under the action of this combined force. The deformation at this time is denoted as x1. Under the action of the combined force of the elastic force provided by the four elastic elements 121 and the supporting force provided by the four pistons 122, the pressure head 110 remains stationary in the initial position. During the vacuum degassing stage, a negative pressure pulling force is applied to the pressure head 110 inside the vacuum chamber 130, and as the vacuum level gradually increases, the negative pressure pulling force also gradually increases. Under the influence of negative pressure and its own weight, the pressure head 110 moves downward against the combined force of the elastic force provided by the four elastic elements 121 and the supporting force provided by the four pistons 122. Furthermore, under the influence of negative pressure and the weight of the pressure head 110 itself, the deformation of the four elastic elements 121 increases, the fluid volume in the first cavity 1241 decreases, and the fluid volume in the second cavity 1242 increases. When the fluid volume in the first cavity 1241 is smaller than the fluid volume in the second cavity 1242, the pressure head 110... The force it experiences is the resultant force of its own weight and the elastic force provided by the four elastic elements 121 minus the resultant force of the downward pressure provided by the four pistons 122, which is the buffer force. At this time, the deformation speed of the elastic element 121 increases, the descent rate of the pressure head 110 increases, and the deformation degree of the four elastic elements 121 reaches its maximum when the vacuum degree in the vacuum chamber 130 reaches the preset range, that is, when the pressure head 110 has moved to the preset position. The deformation of the elastic element 121 at this time is denoted as x2, x2>x1.After the rolling compaction stage, during the inflation and vacuum breaking stage, the negative pressure force generated inside the vacuum chamber 130 on the pressure head 110 gradually decreases until it reaches zero. Understandably, if the elastic properties of the elastic element 121 are sufficiently good, the pressure head 110 can overcome its own weight, negative pressure force, and the downward pressure provided by the four pistons 122 under the combined force of the elastic forces provided by the four elastic elements, and move upwards. The fluid volume in the first chamber 1241 increases during this upward movement, while the fluid volume in the second chamber 1242 decreases. The result of this upward movement can be divided into two cases: the first... In the first case, when the vacuum degree is 0 (i.e., the negative pressure tension is 0), the fluid volume in the first cavity 1241 is greater than the fluid volume in the second cavity 1242, and the fluid volumes in both cavities are the initial volumes. Therefore, the force on the elastic element 121 is the component of the weight of the pressure head 110 minus the supporting force of the piston 122. The pressure head 110 then returns to its initial position, and the deformation of the elastic element 121 reverts to x1. In the second case, when the vacuum degree is 0 (i.e., the negative pressure tension is 0), the fluid volume in the first cavity 1241 is greater than the fluid volume in the second cavity 1242, and the fluid volumes in both cavities are the initial volumes. If the fluid volume in chamber 1 and the fluid volume in chamber 1242 are not the initial volumes, and the fluid volume in chamber 1241 is less than the initial volume, then the force on the elastic element 121 is the component of the weight of the pressure head 110 minus the supporting force of the piston 122. Therefore, the pressure head 110 does not return to its initial position. The deformation of the elastic element 121 at this time is denoted as x3, where x3 > x1. If the pressure head 110 is to return to its initial position, an additional pressure compensation device is needed. For example, when the pressure head 110 moves upward, the first fluid inlet 1243 can be connected to a hydraulic cylinder or a pneumatic cylinder. If the fluid is a liquid, then a hydraulic cylinder can be selected. A hydraulic cylinder, or a pneumatic cylinder if the fluid is gas, is used to adjust the fluid volume in the first chamber 1241 and the second chamber 1242, thereby restoring the deformation of the elastic element 121 to x1 and the pressure head 110 to its original position. In this case, although a hydraulic cylinder or a pneumatic cylinder is used, the pressure head 110 has already been moved up a certain distance by utilizing the elastic potential energy stored in the four elastic elements 121 during the vacuum degassing process before using the hydraulic cylinder or the pneumatic cylinder. Therefore, the energy consumption of the artificial stone pressing and molding equipment in this case is still lower than that of the artificial stone pressing and molding equipment in the prior art.

[0037] It is conceivable that in this embodiment, the first fluid inlet 1243 can be connected to the second fluid inlet 1244. The buffer device 120 in this embodiment can control the movement rate of the pressure head 110 by setting the size of the first fluid inlet 1243 and the second fluid inlet 1244. For example, in the vacuum degassing stage, if a more powerful vacuum pump is selected to improve the compression efficiency and shorten the pressing time, the time of the vacuum degassing stage can be shortened by making the first fluid inlet 1243 larger and the second fluid inlet 1244 correspondingly larger, so that more fluid in the first cavity 1241 flows back to the second cavity 1242 in the same unit time, thereby making the rate of piston 122 pressing down faster, and thus making the rate of pressure head 110 pressing down faster. For another example, in the vacuum degassing stage, if a less powerful vacuum pump is selected to protect the equipment and prevent damage, the deformation of the elastic element 121 in a short time is prevented from being too large and exceeding the deformation threshold. By making the first fluid inlet 1243 smaller and the second fluid inlet 1244 correspondingly smaller, less fluid in the first cavity 1241 will flow back into the second cavity 1242 within the same unit time, thereby slowing down the rate at which the piston 122 is pressed down, and consequently slowing down the rate at which the pressure head 110 is pressed down. It is understandable that the same principle applies to the gas filling and vacuum breaking process, which will not be elaborated here.

[0038] Furthermore, it is conceivable that, in order to more conveniently control the movement speed of the pressure head 110, a first fluid valve can be set in the first fluid inlet 1243 and a second fluid valve can be set in the second fluid inlet 1244. A controller can be set to be connected to the first fluid valve and the second fluid valve respectively. When it is desired to increase the movement speed of the pressure head 110, the controller can be used to control the first fluid valve and the second fluid valve to enlarge the first fluid inlet 1243 and the second fluid inlet 1244. When it is desired to slow down the movement speed of the pressure head 110, the controller can be used to control the first fluid valve and the second fluid valve to shrink the first fluid inlet 1243 and the second fluid inlet 1244. The advantage of this embodiment is that the size of the first fluid inlet 1243 and the second fluid inlet 1244 can be dynamically matched according to the power of the vacuum pump. Of course, it is also understandable that, in order to save costs, the size of the corresponding first fluid inlet 1243 and the second fluid inlet 1244 can also be controlled manually by controlling the first fluid valve and the second fluid valve.

[0039] It is conceivable that, in one embodiment of the present invention, the buffer device 120 may further include a piston 122, a piston rod 123, and a barrel 124. The piston 122 is disposed inside the barrel 124, and the two ends of the piston rod 123 are respectively connected to the piston 122 and the pressure head 110. The barrel 124 is divided into a first cavity 1241 and a second cavity 1242 by the piston 122. The barrel 124 is also provided with a first fluid inlet 1243 and a second fluid inlet 1244. The first fluid inlet 1243 communicates with the first cavity 1241, and the second fluid inlet 1244 communicates with the second cavity 1242.

[0040] Furthermore, in this embodiment, before the vacuum degassing process, the pressure head 110 is subjected to the resultant force of its own weight and the supporting force provided by the four pistons 122, i.e., the buffer force. Under the action of the resultant force of the supporting force provided by the four pistons 122, the pressure head 110 remains stationary in its initial position. During the vacuum degassing process, a negative pressure pulling force is applied to the pressure head 110 inside the vacuum chamber 130, and the negative pressure pulling force gradually increases as the vacuum level gradually increases. Under the influence of negative pressure and its own weight, the pressure head 110 moves downward against the combined force of the supporting forces provided by the four pistons 122. Furthermore, under the influence of negative pressure and the weight of the pressure head 110 itself, the fluid volume in the first chamber 1241 decreases, and the fluid volume in the second chamber 1242 increases. At this point, two scenarios can be analyzed in detail. In the first scenario, after the pressure head 110 moves to the preset position, the fluid volume in the first chamber 1241 is greater than the fluid volume in the second chamber 1242. In this case, the pressure head 110 experiences forces from the four pistons. The supporting force provided by pistons 122, the negative pressure pulling force, and the weight of the press head 110 itself are all present. In the second case, after the press head 110 moves down to the preset position, the fluid volume in the first cavity 1241 is smaller than the fluid volume in the second cavity 1242. At this time, the force on the press head 110 consists of the downward pressure provided by the four pistons 122, the negative pressure pulling force, and the weight of the press head 110 itself. The pressure on the pressed billet is provided by the downward pressure provided by the four pistons 122, the negative pressure pulling force, and the weight of the press head 110 itself. It is understood that those skilled in the art can determine the force based on the above... The design of the two scenarios includes the distance the pressure head 110 moves downward, the volume of the first cavity 1241 and the second cavity 1242 before the vacuum pumping stage, and the size of the first fluid inlet 1243 and the second fluid inlet 1244 when the pressure head 110 moves downward. It is conceivable that in the above two scenarios, when the artificial stone pressing and molding equipment performs the air inflation and vacuum breaking stage after the rolling compaction stage, it is necessary to connect an additional power compensation device, such as a cylinder or hydraulic cylinder, to provide additional power so that the pressure head 110 moves upward to the initial position. However, it is understandable that the device in this embodiment has a simpler structure for the buffer device 120 than the device in the previous embodiment, and fewer variables need to be considered in the design. Moreover, compared with the existing artificial stone pressing and molding equipment, the advantage is that in the vacuum degassing stage, when the pressure head 110 moves downward, the position of the pressure head 110 can be adjusted by the buffer device 120 so that when the vacuum degree in the vacuum chamber 130 reaches the preset range, the pressure head 110 can also move downward to the preset position at the same time, saving the subsequent rolling compaction time and improving the rolling compaction efficiency.

[0041] Specifically, in one embodiment of the present invention, a vibration mechanism can be provided on the vacuum chamber 130. The advantage of providing a vibration mechanism on the vacuum chamber 130 is that before the rolling compaction stage, the vibration mechanism on the vacuum chamber 130 can be activated first. By vibrating the vacuum chamber 130, the billet is more evenly distributed, thereby reducing the air and small gaps left in the billet, and making the rolling effect of the subsequent rolling device 140 better. Alternatively, a vibration mechanism can be provided on the pressure head 110. During the rolling compaction stage, under the vibration action of the vibration mechanism on the pressure head 110, the billet particles undergo relative displacement and achieve a compact state. Through the simultaneous action of vibration and rolling, the efficiency of the rolling device 140 in one rolling stage is increased by 1 to 2 times. Of course, it is understandable that, in order to achieve a better rolling compaction effect, a vibration mechanism can be set on the vacuum chamber 130 and the pressure head 110. Moreover, it is conceivable that, due to the improved rolling effect of the rolling device 140, the advantage of setting a vibration structure on the vacuum chamber 130 and / or the pressure head 110 is to shorten the rolling compaction time.

[0042] Reference Figure 4 and Figure 6 The rolling device 140 includes a rolling power mechanism 141, a roller assembly 143, and a roller assembly 143 mounting frame 142. The rolling power mechanism 141 is connected to the roller assembly 143 mounting frame 142, which is positioned above the roller assembly 143. The roller assembly 143 is mounted on the roller assembly 143 mounting frame 142. It is conceivable that the rolling power mechanism 141 can be a structure where an electric motor drives a cam or a crank drives a connecting rod, or a structure where a hydraulic cylinder drives a hydraulic cylinder or an air compressor cylinder pushes a piston rod. Besides the above structures, it can also be other structures capable of reciprocating motion.

[0043] Furthermore, referring to Figure 4 and Figure 5In order to prevent the work roll 1431 from deforming or to prevent the roll diameter of the work roll 1431 from being increased in order to ensure the rigidity of the work roll 1431, which would result in a deterioration of the pressing effect of the roll, a support roll 1432 corresponding to the work roll 1431 can be set after the work roll 1431 is set. It is conceivable that to achieve the same pressure while reducing the contact area between the work roll 1431 and the blank, and thus increasing the pressure, multiple sets of work rolls 1431 could be used. While this reduces the contact area, the clamping force at both ends of the work roll 1431 is greater than that in the middle during rolling compaction. Therefore, the work rolls at the ends are less prone to deformation, while the middle section is more susceptible to deformation. Furthermore, increasing the diameter of the work roll 1431 to maintain its rigidity would increase the contact area, resulting in a poorer pressing effect under the same pressure. Therefore, to reduce the contact area of ​​the work roll 1431 while maintaining the pressing effect, a different approach could be taken. Figure 4 As shown, a support roller 1432 is provided to apply a certain pressure to the middle part of the work roller 1431 when the work roller 1431 is rolling, thereby preventing the middle part of the work roller 1431 from deforming when it is rolling.

[0044] Understandably, depending on the feeding method, the vacuum chamber 130 can be configured as an integral structure or a split structure, as shown in the reference. Figure 1 , Figure 1 The vacuum chamber 130 has sealing doors 131 on both sides. During feeding, one sealing door 131 opens, and then closes during subsequent processing. The function of the sealing doors 131 is to maintain the vacuum environment inside the vacuum chamber 130 during the vacuum degassing process. The sealing element 132 works similarly, so it will not be elaborated further. Of course, if the vacuum chamber 130 is accessed from the front and no sealing door 131 is provided, refer to... Figure 2 The vacuum chamber 130 can be configured as a split structure. During feeding, the vacuum chamber 130 is lifted by the vacuum chamber lifting power mechanism 133. Then, when the billet enters the pressing station, the vacuum chamber 130 covers the billet by the vacuum chamber lifting power mechanism 133 for subsequent processing. It is worth noting that the vacuum chamber lifting power mechanism 133 can be a cylinder or a hydraulic cylinder. This embodiment of the invention is not limited to this, and those skilled in the art can choose according to the actual situation.

[0045] Furthermore, it should be noted that the artificial stone pressing and forming equipment of the present invention also includes a carrier 150. The carrier 150 can be a metal template with a frame or a metal plate without a frame. For the artificial stone pressing and forming equipment of the present invention, a corresponding frame can be set on the press head 110 for the metal plate without a frame. It can be understood that, in addition to the above embodiments, the carrier 150 can also be a metal disc or a rubber disc or rubber pad with a certain strength, etc., which have a bearing function.

[0046] In one embodiment of the present invention, after the inflation and vacuum breaking stage is completed, the feeding stage is performed, as described below. Figure 7 and Figure 8 The feeding process is as follows: the first feeding device 160 first lifts the carrier 150 through the lifting mechanism 161, the sealing doors 131 on both sides of the vacuum box 130 are opened, and then the carrier 150 is pushed forward by the first traveling mechanism 162. The carrier 150 pushes the carrier 150 that has been pressed in front to move forward out of the pressing station. Then the second feeding device 170 moves the pressed carrier 150 to the next process station through the second traveling mechanism 171.

[0047] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A device for pressing and molding artificial stone, characterized in that, The device includes a pressure head, a buffer device, a vacuum chamber, and a rolling device. The vacuum chamber has an opening at the top, and the pressure head is positioned at the opening. The buffer device is positioned between the vacuum chamber and the pressure head and is used to adjust the position of the pressure head according to the vacuum level inside the vacuum chamber. The rolling device is positioned at the bottom of the pressure head and is used to roll the artificial stone. Formula 1 is (F1+G-F2) / M=K, where F1 is the negative pressure force applied to the pressure head by the vacuum chamber when the gas inside the vacuum chamber is removed, G is the weight of the pressure head, F2 is the buffering force generated by the buffer device on the pressure head when the gas inside the vacuum chamber is removed, M is the contact area between each part of the rolling device used for rolling and the artificial stone, and K is the resulting pressure. The rolling device includes a rolling power mechanism, a roller group, and a roller group mounting frame. The rolling power mechanism is connected to the roller group mounting frame. The roller group mounting frame is disposed above the roller group, and the roller group is mounted on the roller group mounting frame. The roller set includes a working roller and a support roller corresponding to the working roller; The pressure head and / or the vacuum chamber are equipped with a vibration mechanism.

2. The device according to claim 1, characterized in that, The buffer device includes: an elastic element, a piston, a piston rod, and a barrel. The piston is disposed in the barrel. The two ends of the piston rod are respectively connected to the piston and the pressure head. The elastic element is disposed between the pressure head and the barrel and sleeved on the piston rod. The barrel is divided into a first cavity and a second cavity by the piston. The barrel is also provided with a first fluid inlet and a second fluid inlet. The first fluid inlet communicates with the first cavity, and the second fluid inlet communicates with the second cavity.

3. The device according to claim 2, characterized in that, A first fluid valve is provided on the first fluid inlet, and a second fluid valve is provided on the second fluid inlet.

4. The device according to claim 1, characterized in that, The vacuum chamber can be a single-piece structure or a split structure.

5. The device according to claim 1, characterized in that, The device also includes a support for supporting the artificial stone.

6. The device according to claim 5, characterized in that, The equipment also includes a first feeding device and a second feeding device. The first feeding device is provided with a lifting mechanism and a first traveling mechanism. The second feeding device includes a second traveling mechanism. The first feeding device is used to feed the load into the vacuum chamber, and the second feeding device is used to transport the load out of the vacuum chamber.

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