CN115157745A - Pressure maintaining equipment - Google Patents

Abstract

The invention discloses pressure maintaining equipment, wherein the pressure maintaining equipment comprises a rack, a mounting rack, a driving assembly, a floating pressure maintaining assembly and a pressure detection assembly; the mounting rack is mounted on one side of the rack; the driving assembly is mounted on the mounting frame; the floating pressure maintaining assembly is connected with the driving assembly, and the driving assembly is used for driving the floating pressure maintaining assembly to move so that the floating pressure maintaining assembly compresses materials; the pressure detection assembly is connected with the driving assembly and used for detecting the pressure of the floating pressure maintaining assembly when the floating pressure maintaining assembly compresses the material. The technical scheme of the invention can increase the uniformity of the pressing force provided by the pressure maintaining equipment so as to reduce the reject ratio of products.

Description

Pressure maintaining equipment

Technical Field

The invention relates to the technical field of pressure maintaining equipment, in particular to pressure maintaining equipment.

Background

In mechanical production, the material can assemble the product through the form of pasting on, in the 3C field, the application of pressurize equipment is comparatively extensive, can be used to paste the equipment pressurize of class product, replaces artifical pressfitting action of accomplishing high requirement, not only can the helping hand realize enterprise's automated production, can promote the quality of material moreover, can help the enterprise to alleviate very big burden pressure. However, the pressure maintaining equipment on the market at present provides uneven pressure force, so that the adhesion quality of the materials is uneven, the adhesion efficiency is reduced, and the reject ratio of products is increased.

Disclosure of Invention

The invention mainly aims to provide pressure maintaining equipment, which aims to increase the uniformity of the pressing force provided by the pressure maintaining equipment so as to reduce the reject ratio of products.

In order to achieve the above object, the present invention provides a pressure maintaining apparatus, comprising:

a frame;

the mounting rack is mounted on one side of the rack;

a drive assembly mounted to the mounting bracket;

the floating pressure maintaining assembly is connected with the driving assembly, and the driving assembly is used for driving the floating pressure maintaining assembly to move so that the floating pressure maintaining assembly compresses the material; and

and the pressure detection assembly is connected with the driving assembly and is used for detecting the pressure when the floating pressure maintaining assembly compresses the material.

Optionally, the unsteady pressurize subassembly includes a plurality of pressurize heads and first fixed plate, first fixed plate with drive assembly drive connection, drive assembly is used for the drive first fixed plate removes in the direction of height, the pressurize head includes pressurize piece, linear bearing and ejector pin, the ejector pin is kept away from drive assembly's one end is connected with the pressurize piece, the ejector pin is inserted and is located linear bearing, and can follow linear bearing's axial displacement, and is a plurality of linear bearing all wears to locate first fixed plate.

Optionally, the pressure maintaining head further comprises an elastic member, the elastic member is sleeved on the ejector rod and located between the linear bearing and the pressure maintaining block, and the elastic member is used for buffering pressure from the linear bearing.

Optionally, the resilient member is configured as a spring.

Optionally, the pressure maintaining head further comprises a first limiting part, the first limiting part is arranged at one end, away from the pressure maintaining block, of the ejector rod, and the first limiting part can prevent the ejector rod from being separated from the lower portion of the linear bearing.

Optionally, the drive assembly includes driving actuating cylinder, a plurality of guiding axle, a plurality of second locating part and lifter plate, drive actuating cylinder install in the mounting bracket, drive actuating cylinder's promotion head with the lifter plate is connected, and is a plurality of the guiding axle will the mounting bracket with the lifter plate is connected, and is a plurality of the guiding axle is for but the mobile setting of mounting bracket, drive actuating cylinder is used for releasing and pulling back the lifter plate, one the second locating part is connected in two the guiding axle, and is located two the guiding axle is kept away from the one end of lifter plate.

Optionally, the driving assembly further comprises a plurality of lifting rods and a second fixing plate, the lifting plates are movably connected with the plurality of lifting rods, and the other ends of the plurality of lifting rods are connected to the second fixing plate.

Optionally, the pressure detecting assembly includes a pressure sensor and a pressure regulating valve, the pressure sensor is disposed on one side of the lifting plate facing the second fixing plate, after the lifting plate is pressed down, the pressure sensor contacts the second fixing plate to obtain a pressure value during pressing, the pressure regulating valve is mounted on the frame and connected to the driving cylinder, and the pressure regulating valve can display an air pressure value of the driving cylinder and is used for regulating an air pressure entering the driving cylinder.

Optionally, the mounting bracket includes mounting panel and reinforcing plate the mounting panel is fixed in the frame, drive actuating cylinder install in the mounting panel, it is a plurality of the guiding axle wears to locate the mounting panel, the reinforcing plate is used for connecting the mounting panel with the frame.

Optionally, the driving assembly drives the floating pressure maintaining assembly to compress the material, and the pressure detection assembly obtains a pressure value of the floating pressure maintaining assembly compressing the material;

if the pressure value reaches a set value, the floating pressure maintaining assembly continuously compresses the material for a preset time and then lifts up to complete pressure maintaining work;

if the pressure value does not reach the set value, the floating pressure maintaining assembly is lifted and then compresses the material again, the pressure detection assembly obtains the pressure value of the floating pressure maintaining assembly for compressing the material again, and if the pressure value reaches the set value, the floating pressure maintaining assembly is lifted after continuously compressing the material for a preset time to complete pressure maintaining work; if the pressure value does not reach the set value, the lifting and pressing action and the pressure detection action are continuously repeated until the pressure value reaches the set value;

if the pressure value does not reach the set value after the repeated lifting and pressing actions and the pressure detection actions exceed the preset times, the work is stopped, and the size of the input air pressure value in the driving assembly is adjusted.

According to the technical scheme, the floating pressure maintaining assembly is pressed down to the material through the driving assembly, the material is adhered to the corresponding position on the product, the floating pressure maintaining assembly can perform pressure maintaining action on the material at the moment, due to the influence of the external environment and the working state of the air cylinder, when the driving assembly drives the floating pressure maintaining assembly to press down, the pressing force may not reach or exceed a preset pressure value, whether the pressing force reaches the preset pressure value or not can be checked through the pressure detection assembly at the moment, if the preset pressure value is reached, the floating pressure maintaining assembly is lifted up after pressure maintaining for a period of time, then the next group of material is pressed, if the pressing force is not reached, the material is pressed down after being lifted up again, and the pressing action after being lifted up for multiple times is repeated until the pressure reaches the preset value. Set up pressure value back up to standard like this and float the pressurize subassembly and compress tightly completely on the material to guarantee that the pressfitting power that everywhere material received is the same, improve the degree of consistency that the pressurize equipment provided the pressfitting power, in order to reach the purpose that reduces the material defective rate.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of a pressure holding apparatus according to the present invention;

FIG. 2 is a schematic structural diagram of the floating pressure maintaining assembly of FIG. 1;

fig. 3 is a schematic structural view of the driving assembly, the mounting plate and the pressure sensor in fig. 1.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides pressure maintaining equipment which is used for a material pasting station.

In the embodiment of the present invention, as shown in fig. 1 to 3, the pressure holding apparatus includes a frame 10, a mounting frame 11, a driving assembly 12, a floating pressure holding assembly 13, and a pressure detecting assembly; the mounting frame 11 is mounted on one side of the frame 10; the driving assembly 12 is mounted on the mounting frame 11; the floating pressure maintaining assembly 13 is connected with the driving assembly 12, and the driving assembly 12 is used for driving the floating pressure maintaining assembly 13 to move so that the floating pressure maintaining assembly 13 compresses the material; the pressure detection component is connected with the driving component 12 and used for detecting the pressure when the floating pressure maintaining component 13 compresses the material.

Wherein, this pressurize equipment sets up in the station of pasting on the product line, and the material is placed on the material loading tool, and the material loading tool is aimed at with the product, and pressurize equipment pushes down carries out the pressurize after pasting the material on the product to guarantee that the material can not break away from the product.

According to the technical scheme, the floating pressure maintaining assembly 13 is pressed down to a material through the driving assembly 12, the material is adhered to a corresponding position on a product, at the moment, the floating pressure maintaining assembly 13 can perform pressure maintaining action on the material, due to the influence of the external environment and the working state of the air cylinder, when the driving assembly 12 drives the floating pressure maintaining assembly 13 to press down, the pressing force may not reach or exceed a preset pressure value, at the moment, whether the pressing force reaches the preset pressure value or not can be checked through the pressure detection assembly, if the preset pressure value is reached, the material is lifted up after pressure maintaining is carried out for a period of time and then is pressed down for the next group of materials, if the pressure value is not reached, the material is pressed down after being lifted up again, and the action of pressing down after being lifted up for multiple times is repeated until the pressure reaches the preset value. Set up pressure value back unsteady pressurize subassembly 13 after up to standard like this and compress tightly on the material completely to it is the same to guarantee that everywhere material received's pressfitting force, improves the degree of consistency that the pressurize equipment provided pressfitting force, in order to reach the purpose that reduces the material defective rate.

In an embodiment, the floating pressure maintaining assembly 13 includes a plurality of pressure maintaining heads and a first fixing plate 134, the first fixing plate 134 is in driving connection with the driving assembly 12, the driving assembly 12 is used for driving the first fixing plate 134 to move in the height direction, the pressure maintaining heads include a pressure maintaining block 131, a linear bearing 133 and a push rod 132, one end of the push rod 132, which is far away from the driving assembly 12, is connected with the pressure maintaining block 131, the push rod 132 is inserted in the linear bearing 133 and can move along the axial direction of the linear bearing 133, and the linear bearings 133 are all inserted in the first fixing plate 134.

Specifically, when the driving assembly 12 drives the first fixing plate 134 to press down and the plurality of pressure maintaining blocks 131 are pressed to the working surface, the plurality of push rods 132 on the first fixing plate 134 move upward to buffer the plurality of pressure maintaining blocks 131, so as to prevent the pressure maintaining blocks 131 from directly colliding with the material in a rigid manner under a state with a large impact force. Set up like this and can prevent to keep briquetting 131 direct impact to lead to the material to damage, can also increase the life of keeping briquetting 131 self simultaneously. In other embodiments, a rubber gasket is disposed on a side of each of the pressure maintaining blocks 131 facing away from the first fixing plate 134.

In one embodiment, the pressure-maintaining head further includes an elastic member 135, the elastic member 135 is sleeved on the top rod 132 and located between the linear bearing 133 and the pressure-maintaining block 131, and the elastic member 135 is used for buffering the pressure from the linear bearing 133.

Specifically, during the pressure maintaining operation, the elastic member 135 is in a compressed state, the elastic member 135 can provide a thrust to the pressure maintaining block 131, so that the pressure maintaining block 131 has a tendency of moving toward the material, and the elastic member 135 can provide a thrust to the linear bearing 133 to buffer the pressure when the linear bearing 133 is pressed down to the pressure maintaining block 131, so as to prevent the linear bearing 133 from directly colliding with the pressure maintaining block 131. Set up like this, so after the action of keeping in pressure, can increase the speed that keeps pressure piece 131 return to improve the execution efficiency of pressurize equipment, also can avoid linear bearing 133 and keep pressure piece 131 to damage, increase life. In other embodiments, one end of the elastic member 135 is connected to the pushing rod 132, and the other end is connected to the first fixing plate 134, so that the elastic member 135 provides a pushing force to the pushing rod 132, and the pushing rod 132 tends to move toward one end of the holding block 131.

In one embodiment, the resilient member 135 is configured as a spring.

Specifically, the spring is sleeved on the top rod 132, one end of the spring abuts against the linear bearing 133, the other end of the spring abuts against the upper end of the pressure maintaining block 131, and the spring is in a compressed state when being sleeved on the top rod 132, so that the elastic element 135 can ensure that the pressure maintaining block always has a downward movement tendency. With the arrangement, the spring occupies a small space and can be sleeved on the top rod 132, so that the spring can move along the axial direction of the top rod 132 when moving. In other embodiments, the elastic member 135 is a rubber ring, a groove is formed in one end of the push rod 132, which is away from the pressure maintaining block 131, one end of the rubber ring is hung in the groove of the push rod 132, the other end of the rubber ring is fixed to the first fixing plate 134, when the pressure maintaining head compresses the material, the upper end of the push rod 132 rises, the rubber ring is tensioned, the rubber ring provides thrust to the push rod 132, the push rod 132 has a tendency to move towards the lower end, and after the compression is completed, the rubber ring recovers, and the push rod 132 is pulled down.

In an embodiment, the pressure maintaining head further includes a first limiting member 136, the first limiting member 136 is disposed at an end of the top rod 132 far away from the pressure maintaining block 131, and the first limiting member 136 can prevent the top rod 132 from coming out from below the linear bearing 133.

Specifically, the first limiting member 136 is plate-shaped and disposed at the end of the top rod 132, the cross-sectional area of the first limiting member 136 is larger than the aperture of the linear bearing 133, and when the top rod 132 falls, the limiting member can abut against the upper end of the linear bearing 133 to prevent the top rod 132 from falling off, so that the top rod 132 can be prevented from falling off. In other embodiments, the first position-limiting element 136 is in a shape of a bar, and extends along the circumferential direction of the top rod 132, and is located on the outer wall surface of the top rod 132 above the linear bearing 133.

In an embodiment, the driving assembly 12 includes a driving cylinder 121, a plurality of guiding shafts 122, a plurality of second stoppers 123 and a lifting plate 124, the driving cylinder 121 is mounted on the mounting block 11, a pushing head of the driving cylinder 121 is connected to the lifting plate 124, the plurality of guiding shafts 122 connect the mounting block 11 to the lifting plate 124, the plurality of guiding shafts 122 are movably disposed relative to the mounting block 11, the driving cylinder 121 is used for pushing out and pulling back the lifting plate 124, and a second stopper 123 is connected to the two guiding shafts 122 and located at an end of the two guiding shafts 122 away from the lifting plate 124.

Specifically, a driving cylinder 121 is disposed through the mounting block 11, and a plurality of guide shafts 122 are disposed on two sides of the driving cylinder 121, in this embodiment, two guide shafts 122 are disposed on two sides of the driving cylinder 121, and four guide shafts 122 are movably disposed through the mounting block 11, so that two second limiting members 123 are disposed, and two guide shafts 122 are fixed to the second limiting members 123, when the guide shafts 122 move downward too much, the lower ends of the second limiting members 123 can abut against the mounting block 11, and can prevent the guide shafts 122 from separating from the mounting block 11 downward, the lower ends of the four guide shafts 122 are all fixedly connected to the lifting plate 124, and the pushing head of the driving cylinder 121 is also connected to the lifting plate 124. With the arrangement, when the driving cylinder 121 pushes the lifting plate 124 to move downwards, the guide shaft 122 can move along with the movement of the lifting plate 124, and the movement of the position connected with the guide shaft 122 is ensured to be synchronous, so that the lifting plate 124 cannot be inclined when descending, and the distribution uniformity of the pressure during the pressing is improved. In other embodiments, the number of the guide shafts 122 is two, and the two guide shafts 122 are respectively disposed at two ends of the driving cylinder 121.

In one embodiment, the driving assembly 12 further includes a plurality of lifting rods 125 and a second fixing plate 126, the lifting plate 124 is movably connected with the plurality of lifting rods 125, and the other ends of the plurality of lifting rods 125 are connected to the second fixing plate 126.

Specifically, the number of the lifting rods 125 in this embodiment is four, the four lifting rods 125 are fixed to the second fixing plate 126 at intervals, and movably mounted on the lifting plate 124, and are all disposed at intervals with the pushing head of the driving cylinder 121, and after the floating pressure maintaining assembly 13 compresses the material, the lifting plate 124 moves downward along the axial direction of the lifting rods 125. This arrangement provides a cushioning effect so that the lifting plate 124 does not directly impact the second fixing plate 126, thereby increasing the service life of the driving assembly 12. In other embodiments, a plurality of lift pins 125 are fixed to the lift plate 124 at one end and movably connected to the second fixing plate 126 at the other end.

In one embodiment, the pressure detecting assembly includes a pressure sensor 14 and a pressure regulating valve 15, the pressure sensor 14 is disposed on a side of the lifting plate 124 facing the second fixing plate 126, the pressure sensor 14 contacts the second fixing plate 126 after the lifting plate 124 is pressed down, so as to obtain a pressure value when the lifting plate is pressed, the pressure regulating valve 15 is mounted on the frame 10 and connected to the driving cylinder 121, and the pressure regulating valve 15 can display a pressure value of the driving cylinder 121 and is used for regulating a pressure level entering the driving cylinder 121.

Specifically, when the driving assembly 12 drives the floating pressure maintaining assembly 13 to press down, the pressure sensor 14 located below the lifting plate 124 abuts against the second fixing plate 126, and at this time, the pressure sensor 14 can feed back pressure to the pressure maintaining device, and through computer comparison, if the fed back pressure value is different from a required pressure value, the pressure entering the driving cylinder 121 is adjusted through the pressure regulating valve 15, so as to ensure that the output pressure reaches a preset pressure value. Set up like this and can guarantee that pressure reaches the numerical value that needs to guarantee the effect of pasting, promote the yields of product. In other embodiments, the lifting plate 124 of the pressure sensor 14 faces one side of the driving cylinder 121 and is located right below the driving cylinder 121, and when the driving cylinder 121 drives the lifting plate 124 to descend, the pushing head of the driving cylinder 121 abuts against the pressure sensor 14, so as to obtain the pressure value during pressing.

In one embodiment, the mounting bracket 11 includes a mounting plate 111 and a reinforcing plate 112, the mounting plate 111 is fixed to the rack 10, the driving cylinder 121 is mounted on the mounting plate 111, the plurality of guide shafts 122 are disposed through the mounting plate 111, and the reinforcing plate 112 is used for connecting the mounting plate 111 and the rack 10.

Specifically, the number of the reinforcing plates 112 is two, the reinforcing plates 112 have two straight sides, the reinforcing plates 112 are located above the mounting plate 111, one straight side of the reinforcing plates 112 is connected to the rack 10, the other straight side is connected to the mounting plate 111, and the two reinforcing plates 112 are oppositely disposed at two ends of the mounting plate 111. This arrangement can enhance the mounting stability of the mounting plate 111, so that the drive assembly is more stable during operation. In other embodiments, the stiffener plate 112 is positioned below the mounting plate 111.

In one embodiment, the driving component 12 drives the floating pressure maintaining component 13 to compress the material, and the pressure detecting component obtains a pressure value of the floating pressure maintaining component 13 compressing the material;

if the pressure value reaches a set value, the floating pressure maintaining assembly 13 is lifted after continuously compressing the materials for a preset time, and pressure maintaining work is completed;

if the pressure value does not reach the set value, the floating pressure maintaining assembly 13 is lifted and then compresses the material again, the pressure detection assembly obtains the pressure value of the floating pressure maintaining assembly 13 compressing the material again, and if the pressure value reaches the set value, the floating pressure maintaining assembly 13 is lifted after continuously compressing the material for the preset time to complete pressure maintaining work; if the pressure value does not reach the set value, the lifting and pressing action and the pressure detection action are continuously repeated until the pressure value reaches the set value;

if the pressure value does not reach the set value after the repeated lifting and pressing actions and the pressure detection actions exceed the preset times, the operation is stopped, and the input air pressure value in the driving assembly 12 is adjusted.

Specifically, the pressure value is determined according to the material to be pasted, the preset time range is greater than or equal to 15 seconds and less than or equal to 45 seconds, and the preset time specifically may be: 15 seconds, 20 seconds, 25 seconds, 30 seconds, 35 seconds, 40 seconds or 45 seconds, the preset time in the embodiment is 30 seconds, when the pressure maintaining time is less than 30 seconds, the pressure maintaining time is short, the material can not be ensured to be completely adhered to the product, and when the pressure maintaining time is more than 30 seconds, the adhering and pressure maintaining efficiency can be delayed; the preset number of times may be: 2 times, 3 times, 4 times or 5 times, the preset times in the embodiment are 3 times, when the preset times are less than 3 times, the repeated times of the lifting and pressing action and the pressure detection action are less, and the pressure feedback times are less; when the preset times is more than 3, the time is delayed to adjust the input air pressure, and the efficiency of pasting and pressure maintaining is influenced. Set up like this and can guarantee the better laminating of material to the product on, improve the efficiency of pasting the pressurize simultaneously. In other embodiments, the predetermined time is 25 seconds and the predetermined number of times is 2.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A pressure maintaining apparatus, characterized by comprising:

a frame;

the mounting rack is mounted on one side of the rack;

a drive assembly mounted to the mounting bracket;

the floating pressure maintaining assembly is connected with the driving assembly, and the driving assembly is used for driving the floating pressure maintaining assembly to move so that the floating pressure maintaining assembly compresses the material; and

and the pressure detection assembly is connected with the driving assembly and is used for detecting the pressure when the floating pressure maintaining assembly compresses the material.

2. The pressure maintaining apparatus according to claim 1, wherein the floating pressure maintaining assembly includes a plurality of pressure maintaining heads and a first fixing plate, the first fixing plate is drivingly connected to the driving assembly, the driving assembly is configured to drive the first fixing plate to move in the height direction, the pressure maintaining heads include pressure maintaining blocks, linear bearings, and ejector rods, one end of the ejector rods, which is away from the driving assembly, is connected to the pressure maintaining blocks, the ejector rods are inserted into the linear bearings and can move along the axial direction of the linear bearings, and the plurality of linear bearings are all inserted into the first fixing plate.

3. The pressure maintaining apparatus according to claim 2, wherein the pressure maintaining head further comprises an elastic member that is fitted over the ejector pin and is located between the linear bearing and the pressure maintaining block, the elastic member being configured to buffer a pressure from the linear bearing.

4. The pressure maintaining apparatus according to claim 3, wherein the elastic member is configured as a spring.

5. The pressure holding apparatus according to claim 2, wherein the pressure holding head further includes a first stopper provided at an end of the ejector rod remote from the pressure holding block, the first stopper being capable of preventing the ejector rod from coming out from below the linear bearing.

6. The dwelling apparatus of claim 2, wherein the driving assembly includes a driving cylinder, a plurality of guide shafts, a plurality of second stoppers and a lifting plate, the driving cylinder is mounted on the mounting frame, a pushing head of the driving cylinder is connected to the lifting plate, the plurality of guide shafts connect the mounting frame to the lifting plate, the plurality of guide shafts are movably disposed with respect to the mounting frame, the driving cylinder is used for pushing out and pulling back the lifting plate, and one of the second stoppers is connected to both of the guide shafts and located at an end of both of the guide shafts away from the lifting plate.

7. The pressure maintaining apparatus of claim 6, wherein the driving assembly further comprises a plurality of lift rods and a second fixing plate, the lift rods being movably connected to the lift plate, and the other ends of the plurality of lift rods being connected to the second fixing plate.

8. The pressure maintaining apparatus of claim 7, wherein the pressure detecting assembly comprises a pressure sensor and a pressure regulating valve, the pressure sensor is disposed on a side of the lifting plate facing the second fixing plate, the pressure sensor contacts the second fixing plate when the lifting plate is pressed down to obtain a pressure value during pressing, the pressure regulating valve is mounted on the frame and connected to the driving cylinder, and the pressure regulating valve can display a pressure value of the driving cylinder and is used for regulating a pressure entering the driving cylinder.

9. The pressure maintaining apparatus according to claim 6, wherein the mounting frame includes a mounting plate and a reinforcing plate, the mounting plate is fixed to the frame, the driving cylinder is mounted to the mounting plate, the plurality of guide shafts are provided through the mounting plate, and the reinforcing plate is configured to connect the mounting plate and the frame.

10. The pressure maintaining apparatus according to claim 1, wherein the driving assembly drives the floating pressure maintaining assembly to compress the material, and the pressure detecting assembly obtains a pressure value at which the floating pressure maintaining assembly compresses the material;

if the pressure value reaches a set value, the floating pressure maintaining assembly continuously compresses the material for a preset time and then lifts up to complete pressure maintaining work;

if the pressure value does not reach the set value, the floating pressure maintaining assembly is lifted and then compresses the material again, the pressure detection assembly obtains the pressure value of the floating pressure maintaining assembly for compressing the material again, and if the pressure value reaches the set value, the floating pressure maintaining assembly is lifted after continuously compressing the material for a preset time to complete pressure maintaining work; if the pressure value does not reach the set value, continuously and repeatedly lifting and pressing actions and pressure detection actions until the pressure value reaches the set value;

if the pressure value does not reach the set value after the repeated lifting and pressing actions and the pressure detection actions exceed the preset times, the work is stopped, and the size of the input air pressure value in the driving assembly is adjusted.

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