CN114043781A

CN114043781A - Paint mist filters and uses honeycomb paper stretch forming machine

Info

Publication number: CN114043781A
Application number: CN202111364622.9A
Authority: CN
Inventors: 黎敦林; 张松坡
Original assignee: Suzhou Daichuang Filtration System Co ltd
Current assignee: Suzhou Daichuang Filtration System Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-02-15
Anticipated expiration: 2041-11-17
Also published as: CN114043781B

Abstract

The invention relates to a honeycomb paper stretch forming machine for filtering paint mist, which comprises a rack, wherein a paper feeding roller set and a paper drawing roller set are connected to the rack, the paper feeding roller set comprises an upper paper feeding roller and a lower paper feeding roller, a gap for accommodating honeycomb paper is formed between the upper paper feeding roller and the lower paper feeding roller, the rotating speeds of the upper paper feeding roller and the lower paper feeding roller are the same and the rotating directions are opposite, the paper drawing roller set comprises an upper paper drawing roller and a lower paper drawing roller, a gap for accommodating the honeycomb paper is also formed between the upper paper drawing roller and the lower paper drawing roller, the rotating speeds of the upper paper drawing roller and the lower paper drawing roller are the same and the rotating directions are opposite, the rotating speed of the lower paper drawing roller is greater than that of the lower paper feeding roller, a plurality of needle-shaped elements for penetrating a cutting seam on the honeycomb paper are arranged on the surface of the upper paper drawing roller, and the upper paper drawing roller is connected with a lifting driving device. The invention can ensure that the meshes of the formed honeycomb paper are uniform and regular, and effectively ensures the 3D structural form and the integral forming uniformity of the meshes, so that the formed honeycomb paper has excellent paint mist filtering performance.

Description

Paint mist filters and uses honeycomb paper stretch forming machine

Technical Field

The invention relates to the technical field of honeycomb paper processing, in particular to a honeycomb paper stretch forming machine for paint mist filtering.

Background

The existing honeycomb paper is generally divided into three types, namely a honeycomb paper core, honeycomb paper for damping package and honeycomb paper for paint mist filtration.

The honeycomb paper core is a paper board with a sandwich structure formed by connecting corrugated base paper into a plurality of hollow three-dimensional regular hexagons by using an adhesive method to form an integral stressed part, namely the paper core, and bonding surface paper on two sides of the paper core, and the honeycomb paper core is widely applied to the outer package of various easily damaged products or the transfer trays for manufacturing various goods such as raw materials, intermediate products and the like in a production workshop. In the processing process of the honeycomb paper core, a special honeycomb paper core stretching forming machine is used for stretching and synchronous automatic heating and forming to form hexagonal honeycomb paper cores with different thicknesses (the product is in a honeycomb shape, and the thickness can reach more than 10-60 mm generally).

The structure of the honeycomb paper for shock absorption packaging is different from that of the honeycomb paper core, the honeycomb paper is reticular, is mainly used as an environment-friendly shock absorption filling material used in various fragile product packaging boxes, and is used for replacing sponge or polystyrene foaming materials so as to avoid secondary pollution caused by the packaging materials. The method is characterized in that an intermittent kerf array with a specific configuration is cut on a single kraft paper die, the kraft paper is generally in a planar state at the moment, then a stretcher stretches a kerf on the planar kraft paper, the kerf after stretching forms honeycomb meshes, and in the stretching process, because rectangular paper edges with certain width around each mesh can perform relative translation and planar rotation and can synchronously perform regular spiral 3D torsional deformation in the vertical direction, the reticular honeycomb paper after stretching forming can also form a 3D spatial configuration with certain thickness, the thickness can generally reach about 2-4 mm, and the good damping performance is achieved.

The structure of the paint mist filtering honeycomb paper is different from that of the honeycomb paper core, and the paint mist filtering honeycomb paper is also a reticular honeycomb paper, is mainly used as a filter material to be applied to paint mist filtering of various dry-type paint spray rooms, and is used for replacing various chemical fiber filter cotton or glass fiber filter cotton to realize better filtering effect, is more environment-friendly and obviously reduces the cost. The honeycomb paper processing also comprises the steps of firstly die-cutting a single piece of kraft paper into an intermittent kerf array with a specific configuration, wherein the kraft paper is generally in a plane state, then stretching the kerf on the plane kraft paper by a stretching machine, and forming honeycomb meshes by the stretched kerf, wherein in the stretching process, the rectangular paper edges with a certain width around each mesh not only can be relatively translated and rotate in the plane, but also can synchronously generate regular spiral 3D torsional deformation in the vertical direction, so that the stretched and formed mesh honeycomb paper can also form a 3D spatial configuration with a certain thickness.

The structure of the paint mist filtering honeycomb paper is similar to that of the shock absorption packaging honeycomb paper, but a certain difference exists, the paint mist filtering honeycomb paper has to ensure that the 3D structural form and the integral forming uniformity of meshes after stretching meet strict technological requirements, and the net surface of the paint mist filtering honeycomb paper is not allowed to generate obvious warping distortion so as to ensure that the paint mist filtering honeycomb paper has excellent paint mist filtering performance, while the shock absorption packaging honeycomb paper does not have the requirements.

However, the existing stretch forming machine can only meet the requirements of stretch forming of honeycomb paper for shock absorption packaging, the mesh of the stretch formed honeycomb paper is uneven, the whole plane is seriously warped, the regular 3D torsion configuration of the peripheral edges of the mesh is easy to damage, the spiral 3D torsion configurations at the edges of a plurality of meshes are irregularly overlapped, attached and lodged, the technological requirements of the honeycomb paper for paint mist filtering cannot be met, the wind resistance is large, the paint mist filtering efficiency and the dust containing amount of paint slag are reduced, the improvement of the paint mist filtering performance is not facilitated, and the use requirements cannot be met.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the prior stretching forming machine can not process the paint mist filtering honeycomb paper with excellent paint mist filtering performance.

In order to solve the technical problem, the invention provides a honeycomb paper stretch forming machine for paint mist filtration, which comprises a frame, the frame is connected with a paper feeding roller set and a paper pulling roller set, the paper feeding roller set comprises an upper paper feeding roller and a lower paper feeding roller, a gap for containing honeycomb paper is formed between the upper paper feeding roller and the lower paper feeding roller, the rotating speeds of the upper paper feeding roller and the lower paper feeding roller are the same and the rotating directions are opposite, the paper pulling roller group comprises an upper paper pulling roller and a lower paper pulling roller, a gap for accommodating the honeycomb paper is also formed between the upper paper pulling roller and the lower paper pulling roller, the rotating speeds of the upper paper drawing roller and the lower paper drawing roller are the same and opposite in rotation direction, the rotating speed of the lower paper drawing roller is greater than that of the lower paper feeding roller, the surface of the upper paper drawing roller is provided with a plurality of needle-shaped pieces used for penetrating into cutting seams on the honeycomb paper, the upper paper drawing roller is connected with the lifting driving device, and the lifting driving device drives the upper paper drawing roller to move up and down.

In one embodiment of the invention, the paper feeding device further comprises a power input shaft, the power input shaft is connected with the lower paper feeding roller through a first gear transmission mechanism, the lower paper feeding roller is connected with the upper paper feeding roller through a second gear transmission mechanism, the power input shaft is connected with the lower paper pulling roller through a third gear transmission mechanism, and the power input shaft is connected with the upper paper pulling roller through a chain transmission mechanism.

In one embodiment of the invention, the chain transmission mechanism comprises a driving chain wheel, a driven chain wheel and a tension chain wheel, the driving chain wheel and the driven chain wheel are connected through a chain, the driving chain wheel is connected with the power input shaft, the driven chain wheel is connected with the paper pulling-up roller, and the tension chain wheel is meshed with the chain.

In one embodiment of the invention, the tension sprocket is connected to the frame by a tension adjustment device.

In one embodiment of the invention, a photoelectric sensor is further connected to the frame, and the photoelectric sensor is used for detecting the position of the honeycomb paper output by the paper feeding roller group.

In an embodiment of the present invention, a frame beam is connected to the frame, a first shaft is connected to the upward-drawing roller, the lifting driving device includes a lifting beam, a lifting rod, a lifting spring, and a steel cable, one end of the lifting rod is connected to the lifting beam, the other end of the lifting rod is connected to the first shaft through a first lifting slider, one end of the steel cable is connected to the lifting beam, the other end of the steel cable is connected to a steel cable traction device, and the lifting spring is disposed between the lifting beam and the frame beam.

In one embodiment of the invention, the steel cable traction device comprises a compression roller cylinder, a long rocker arm and a short rocker arm, the compression roller cylinder comprises a cylinder body and a push rod which can stretch and retract along the cylinder body, one end of the long rocker arm is hinged with the push rod, the other end of the long rocker arm is hinged with one end of the short rocker arm through a hinge shaft, and the other end of the short rocker arm is connected with the steel cable.

In one embodiment of the invention, a return spring is connected between the push rod and the cylinder body, and a tension spring is connected between the long rocker arm and the rack.

In one embodiment of the invention, the gap adjusting device comprises an adjusting screw rod and a gap adjusting hand wheel, wherein the frame cross beam is connected with the adjusting screw rod through threads, the top end of the adjusting screw rod is connected with the gap adjusting hand wheel, the bottom end of the adjusting screw rod penetrates through the frame cross beam and then is connected with a second lifting slide block, the upper paper feeding roller is connected with a second shaft body, the second lifting slide block is connected with the second shaft body, and a gap adjusting pad of the paper feeding roller is arranged between the second lifting slide block and the frame cross beam.

In one embodiment of the invention, the two sides of the paper feeding roller group are provided with object stages for bearing honeycomb paper, the two sides of the paper pulling roller group are also provided with object stages, and the object stages are connected to the frame.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the honeycomb paper stretch forming machine for paint mist filtering can realize smooth, uniform and continuous stretch forming of honeycomb paper, so that meshes of the formed honeycomb paper are uniform and regular, and the 3D structural form and the integral forming uniformity of the meshes are effectively ensured, so that the formed honeycomb paper has excellent paint mist filtering performance.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a front view of a paint mist filtering honeycomb paper stretch-forming machine of the present invention;

FIG. 2 is a left side view of the stretch-former shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken in the direction N-N of FIG. 1;

FIG. 5 is a cross-sectional view of the upper draw roll of FIG. 3;

FIG. 6 is a schematic view of the upper stretch-forming mechanism of FIG. 3;

FIG. 7 is a front view of the structure shown in FIG. 6;

FIG. 8 is a left side view of the structure shown in FIG. 6;

FIG. 9 is a top view of the structure shown in FIG. 6;

FIG. 10 is a right side view of the structure shown in FIG. 6 with the chain drive case cover removed;

FIG. 11 is a schematic view of the internal structure of FIG. 8 with the cover of the gear box removed;

FIG. 12 is a schematic view showing the internal structure of the paper feeding device of FIG. 8 with the cover of the gear box, the lower paper feeding roller driving gear and the lower paper feeding roller driven gear removed;

FIG. 13 is a cross-sectional view taken in the direction of C-C in FIG. 11;

FIG. 14 is a cross-sectional view taken in the direction D-D of FIG. 9;

the specification reference numbers indicate:

1. a frame; 2. a frame beam;

3. an upper paper feed roller; 31. a second shaft body; 4. a lower paper feed roller; 5. upward drawing a paper roll; 51. a needle-like member; 52. a first shaft body; 6. pulling a paper roll down;

7. a lift drive; 71. a lifting beam; 72. a lifting pull rod; 73. a lifting spring; 74. a steel cord; 75. a first lifting slider; 76. a wire rope traction device; 761. a compression roller cylinder; 7611. a cylinder body; 7612. a push rod; 762. a long rocker arm; 763. a short rocker arm; 77. a tension spring;

8. a power input shaft;

9. a first gear transmission mechanism; 91. the lower paper feeding roller drives the gear; 92. a lower paper feed roller driven gear;

10. a second gear transmission mechanism; 101. an upper paper feed roller driving gear; 102. an upper paper feed roller driven gear;

11. a third gear transmission mechanism; 111. the pull-down paper roll drives a gear; 112. a driven gear of the paper pulling roller;

12. a chain transmission mechanism; 121. a drive sprocket; 122. a driven sprocket; 123. a chain; 124. a tension sprocket; 125. tensioning the adjusting arm; 126. a torsion spring;

13. a gear transmission case; 14. a chain transmission case; 15. a photosensor; 16. a manual press roller operating lever; 17. adjusting the screw rod; 18. a gap adjusting hand wheel; 19. a second lifting slide block; 20. a gap adjusting pad of the paper feeding roller; 21. gap adjusting jackscrews; 22. a gap adjusting pad of a paper drawing roller; 23. an object stage; 24. the turn buckle.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1-9, the embodiment discloses a paint mist filtering honeycomb paper stretch forming machine, which includes a frame 1, wherein a paper feeding roller set and a paper pulling roller set are connected to the frame 1, the paper feeding roller set includes an upper paper feeding roller 3 and a lower paper feeding roller 4, a gap for accommodating honeycomb paper (the honeycomb paper is in a planar state and has a cutting seam for die cutting) is formed between the upper paper feeding roller 3 and the lower paper feeding roller 4, the rotation speeds of the upper paper feeding roller 3 and the lower paper feeding roller 4 are the same and the turning directions are opposite, the paper pulling roller set includes an upper paper pulling roller 5 and a lower paper pulling roller 6, a gap for accommodating honeycomb paper (the honeycomb paper is in a stretched state and the paper thickness is increased) is also formed between the upper paper pulling roller 5 and the lower paper pulling roller 6, the rotation speeds of the upper paper pulling roller 5 and the lower paper pulling roller 6 are the same and the turning directions are opposite, the rotation speed of the lower paper pulling roller 6 is greater than that of the lower paper feeding roller 4, that is the rotation speed of the paper pulling roller set is greater than that of the paper feeding roller set; the surface of the upper paper drawing roller 5 is provided with a plurality of needle-like members 51 for penetrating into the slits on the honeycomb paper; the upper paper drawing roller 5 is connected with a lifting driving device 7, and the lifting driving device 7 drives the upper paper drawing roller 5 to move up and down so as to change the gap between the upper paper drawing roller 5 and the lower paper drawing roller 6 and adapt to the thickness change of the honeycomb paper in the paper drawing process;

in the structure, the rotating speed of the paper pulling roller group is greater than that of the paper feeding roller group, so that the effective stretching of the die-cut paper can be realized by utilizing the rotating speed difference, and the die-cut paper becomes the reticular honeycomb paper with the specified stretching rate. The turning of the feed roller group is designed to press forward and continuously feed the die-cut paper, and the turning of the pull roller group is designed to pull forward and continuously feed the honeycomb paper being formed.

Because the slit width of the cutting slit cut by the paper die is very small, in order to ensure that the cutting slit is smoothly inserted to realize stretching, the needle-shaped piece 51 is arranged on the surface of the upper paper-drawing roller 5, and because the needle-shaped piece 51 is needle-shaped and has a fine structure, the needle-shaped piece 51 can be smoothly inserted into the cutting slit of the paper to realize stretching, thereby forming honeycomb meshes; in addition, if the smooth roll or the convex-concave knurling roll is selected for the upward paper drawing roll 5, the 3D spiral paper edges around the honeycomb meshes formed after stretching are prone to being extruded and seriously distorted/flattened, so that the filtering efficiency and the dust holding capacity of the honeycomb paper filter material are greatly reduced, the wind resistance is greatly improved, the high-efficiency filtering requirement cannot be met, and the needle-shaped piece 51 is arranged on the surface of the upward paper drawing roll 5, so that the problems can be effectively avoided.

And the needle-shaped element 51 is in point-line contact with the paper, so that the paper pulling force causes small positive pressure between the paper and the needle wall and small sliding friction coefficient, honeycomb meshes are not easy to be damaged, and the separation of the paper and the needle-shaped element 51 can be realized more smoothly.

Through the arrangement of the needle-shaped members 51 on the surface of the upper paper drawing roller 5 and the lifting of the upper paper drawing roller 5, the honeycomb paper can adapt to the large thickening of the honeycomb paper in the drawing process, the formed honeycomb paper is not extruded at all, the deformation of the formed honeycomb paper caused by extrusion is avoided, the uniform free 3D spiral torsional deformation of rectangular paper strips on the periphery of each mesh of the honeycomb paper is ensured, and an ideal mesh 3D spiral torsional configuration is formed. The upper paper drawing roller 5 is connected with a driving device capable of dynamically lifting, so that the automatic switching of the stretching forming machine between the initial stretching working state and the steady continuous stretching working state can be effectively ensured.

In one embodiment, the surface pins 51 of the top draw roll 5 are arranged in a circumferential array along the center of the top draw roll 5.

Preferably, referring to fig. 5, the upper draw roller 5 is a card clothing roller, and the lower draw roller 6 is a stainless steel smooth roller to avoid the draw roller group from crushing the honeycomb paper after stretching and damaging the stretched and formed good mesh 3D configuration; the upper paper feed roller 3 and the lower paper feed roller 4 both use an anilox rubber roller.

In one embodiment, referring to fig. 7, the stretch forming machine further includes a power input shaft 8, the power input shaft 8 is driven by a driving motor to rotate, the power input shaft 8 is connected with the lower paper feeding roller 4 through a first gear transmission mechanism 9, the lower paper feeding roller 4 is connected with the upper paper feeding roller 3 through a second gear transmission mechanism 10, the power input shaft 8 is connected with the lower paper pulling roller 6 through a third gear transmission mechanism 11, and the power input shaft 8 is connected with the upper paper pulling roller 5 through a chain transmission mechanism 12 so as to drive the upper paper pulling roller 5 to rotate through the chain transmission mechanism 12.

When the paper feeding device runs, the driving motor drives the power input shaft 8 to rotate, the power input shaft 8 drives the lower paper feeding roller 4 to rotate through the first gear transmission mechanism 9, and then the lower paper feeding roller 4 drives the upper paper feeding roller 3 to rotate through the second gear transmission mechanism 10, so that the lower paper feeding roller 4 and the upper paper feeding roller 3 synchronously rotate in the opposite direction; the lower paper pulling roll 6 is driven to rotate by the power input shaft 8 through the third gear transmission mechanism 11, the upper paper pulling roll 5 is driven to rotate by the power input shaft 8 through the chain transmission mechanism 12, synchronous reverse rotation of the lower paper pulling roll 6 and the upper paper pulling roll 5 is realized, and homodromous differential transmission between the paper feeding roll set and the paper pulling roll set is also realized.

In the structure, in order to realize the initial stretching of each roll of honeycomb paper to adapt to the larger thickening of the honeycomb paper after stretching forming and avoid being extruded by the paper-drawing roller group, the axis of the upper paper-drawing roller 5 needs to move up and down in a larger range under the condition of keeping constant rotation, and the up-and-down lifting range of the upper paper-drawing roller greatly exceeds the range of the change of the center distance allowed by small-module gear transmission, so the driving of the upper paper-drawing roller 5 is realized by adopting a chain transmission mode.

In addition, because the plane paper (the die-cut paper) is located between the upper paper feeding roller 3 and the lower paper feeding roller 4 in the paper feeding roller group, in order to adapt to different raw material paper thickness specifications, the center distance of the upper paper feeding roller 3 and the lower paper feeding roller 4 also needs to be changed, however, because the maximum amplitude of the change of the paper thickness is within 0.5mm, in the allowable center distance change range of the small module gear transmission, the requirements can be met by adopting involute gears for the upper paper feeding roller 3 and the lower paper feeding roller 4 (the involute gears have separability, the separability means that the center distance can be kept away from a small distance, and the transmission ratio of the gear transmission is not changed).

In one embodiment, referring to fig. 8, the first gear transmission 9 and the second gear transmission 10 are both arranged in a gear transmission case 13, the chain transmission 12 is arranged in a chain transmission case 14, the gear transmission case 13 is connected to one side of the machine frame 1, and the chain transmission case 14 is connected to the other side of the machine frame 1.

In one embodiment, referring to fig. 11-14, the first gear transmission mechanism 9 includes a lower paper feeding roller driving gear 91 and a lower paper feeding roller driven gear 92, which are engaged with each other, the lower paper feeding roller driving gear 91 is connected to the power input shaft 8, the lower paper feeding roller driving gear 91 is driven by the power input shaft 8 to rotate, the lower paper feeding roller driven gear 92 is connected to the lower paper feeding roller 4, and the lower paper feeding roller driven gear 92 is connected to the lower paper feeding roller 4 through a central shaft, so that the lower paper feeding roller 4 is driven by the lower paper feeding roller driven gear 92 to rotate;

further, the lower paper feeding roller driving gear 91 and the lower paper feeding roller driven gear 92 are in speed reduction transmission, the speed reduction ratio is 1:1.16, the speed reduction ratio determines the stretching ratio of the honeycomb paper, and when the stretching ratio is changed, the speed reduction ratio also needs to be adjusted correspondingly. That is, by changing the speed ratio of the lower feed roller driving gear 91 and the lower feed roller driven gear 92 in the first gear transmission mechanism 9, the transmission speed ratio between the feed roller group and the draw roller group can be changed at will, thereby changing the overall stretching ratio of the honeycomb paper.

From the above, the speed reduction transmission ratio between the power input shaft 8 and the lower paper feeding roller 4 is 1:1.16, and the rotation directions of the two are opposite.

Referring to fig. 12-14, the second gear transmission mechanism 10 includes an upper paper feeding roller driving gear 101 and an upper paper feeding roller driven gear 102 that are engaged with each other, the upper paper feeding roller driving gear 101 is connected to the lower paper feeding roller 4, the lower paper feeding roller 4 drives the upper paper feeding roller driving gear 101 to rotate together, and the upper paper feeding roller driven gear 102 is connected to the upper paper feeding roller 3, so that the upper paper feeding roller 3 is driven to rotate by the upper paper feeding roller driven gear 102;

further, the transmission ratio between the upper paper feeding roller driving gear 101 and the upper paper feeding roller driven gear 102 is 1:1, so as to ensure that the lower paper feeding roller 4 and the upper paper feeding roller 3 rotate at the same rotating speed and rotate in opposite directions.

From the above, the total deceleration transmission speed ratio between the power input shaft 8 and the upper paper feeding roller 3 is also 1:1.16, and the rotation directions of the two are the same.

Referring to fig. 12-14, the third gear transmission mechanism 11 includes a lower paper-pulling roller driving gear 111 and a lower paper-pulling roller driven gear 112 that are engaged with each other, the lower paper-pulling roller driving gear 111 is connected to the power input shaft 8, the lower paper-pulling roller driving gear 111 is driven by the power input shaft 8 to rotate, the lower paper-pulling roller driven gear 112 is connected to the lower paper-pulling roller 6, the lower paper-pulling roller driven gear 112 and the lower paper-pulling roller 6 can be connected through a central shaft, so that the lower paper-pulling roller driven gear 112 drives the lower paper-pulling roller 6 to rotate;

further, the transmission ratio between the pull-down roller driving gear 111 and the pull-down roller driven gear 112 is 1:1, and the rotational directions are opposite, that is, the transmission ratio between the power input shaft 8 and the pull-down roller 6 is 1:1, and the rotational directions are opposite.

In particular, the technical parameters of the gears in the gear box 13 can be referred to table 1:

table 1 summary of technical parameters of individual gears in a gear transmission

In one embodiment, referring to fig. 10, the chain transmission mechanism 12 includes a driving sprocket 121, a driven sprocket 122 and a tension sprocket 124, the driving sprocket 121 and the driven sprocket 122 are connected by a chain 123, the driving sprocket 121 is connected with the power input shaft 8, the driving sprocket 121 is driven by the power input shaft 8 to rotate, the driven sprocket 122 is connected with the drawing roller 5, and the tension sprocket 124 is engaged with the chain 123.

Further, the transmission ratio between the driving sprocket 121 and the driven sprocket 122 is 1:1, and the rotation directions are the same, that is, the transmission ratio between the power input shaft 8 and the draw-up roller 5 is 1:1, and the rotation directions are the same.

The transmission mode ensures that the paper feeding linear speed of the paper pulling roller set is higher than that of the paper feeding roller set, and the paper feeding directions of the two roller sets are completely the same. Obviously, the feed roller group and the pull roller group are both transmitted with driving force, that is, the above-described transmission mechanism realizes four-roller driving of the upper feed roller 3, the lower feed roller 4, the upper pull roller 5, and the lower pull roller 6. The paper feeding linear speed difference with the same direction and different speeds exists between the paper pulling roller group and the paper feeding roller group, so that the die cutting paper passing through the paper pulling roller group and the paper feeding roller group is uniformly and stably stretched and formed according to the preset stretching rate, and the high-quality honeycomb paper filtering material special for the high-efficiency paint mist filter is formed.

In one embodiment, the tension sprocket 124 is connected to the frame 1 through a tension adjusting device to automatically adapt to the position change of the tension sprocket 124 through the tension adjusting device, so that the tension sprocket 124 is always pressed against the chain 123, and the chain 123 is always in a tension state, thereby ensuring the reliability of the chain transmission. Because the upper paper drawing roller 5 needs to move up and down in a rotating state, when the upper paper drawing roller 5 moves up and down, the driven chain wheel 122 is driven to move up and down together, so that the position of the chain 123 is changed, the position of the tension chain wheel 124 is also changed together, and the tension chain wheel 124 can be pressed on the chain 123 all the time through the tension adjusting device, so that the reliability of chain transmission is ensured.

Furthermore, the tension adjusting device comprises an adjusting torsion spring 126 and a tension adjusting arm 125, the tension sprocket 124 is connected to the tension adjusting arm 125, a bushing is sleeved on the power input shaft 8 and can rotate relative to the power input shaft 8, the bushing is sleeved with the torsion spring 126, one end of the torsion spring 126 is in lap joint or hanging connection with the frame 1, and the other end of the torsion spring 126 is in lap joint with the tension adjusting arm 125. Because of the influence of the pretightening force of the torsion spring 126, the tensioning chain wheel 124 can automatically adapt to the position change of the chain 123 and is always pressed on the chain 123, and the tensioning of the chain 123 is ensured.

In one embodiment, a photoelectric sensor 15 is further connected to the frame 1, and the photoelectric sensor 15 is used for detecting the position of the honeycomb paper (flat die-cut paper) output by the paper feeding roller set, so as to detect and determine whether the current initial head of the die-cut honeycomb paper reaches the position right below the drawing roller 5, and once it is determined that the initial head of the die-cut honeycomb paper reaches the position right below the drawing roller 5, the PLC automatically starts the lifting driving device 7 to drive the drawing roller 5 to descend, so that the needle 51 at the bottom of the drawing roller 5 is thrust and correctly drawn to the head of the die-cut honeycomb paper, and thus the head section of the die-cut honeycomb paper is started to be stretched, and 3D helical distortion and thickening are correctly generated.

The photoelectric sensor 15 needs to be delayed by a set time, a timing delay time is preset by the PLC controller, the delay time is set to be enough to reliably judge that the head of the die-cut honeycomb paper just reaches the position right below the upper drawing roller 5, that is, the time when the head of the die-cut paper just reaches the position right below the needle-shaped member 51 of the upper drawing roller 5 can be correctly judged by setting the delay time, so that once the head of the die-cut honeycomb paper reaches the position right below the upper drawing roller 5, the PLC control system can immediately control the lifting driving device 7 to drive the upper drawing roller 5 to descend, and the head section of the die-cut paper is correctly pulled by the needle-shaped member 51 at the bottom of the upper drawing roller 5 to realize the start-up drawing, and 3D spiral distortion forming and thickening are generated along with the head section of the die-cut paper. After that, the initial stretching of the die-cut paper head section is performed by delaying with a proper timer of the PLC, and the delay must be set just enough to complete the initial stretching of the die-cut paper head section (the initial stretching process is necessarily accompanied by the great thickening of the currently stretched section of the honeycomb paper), and then the upper paper-drawing roller 5 can be quickly raised and reset to the pre-set working height to adapt to the change of the increase of the thickness of the stretched paper (after the initial stretching, the planar paper becomes the three-dimensional paper, and the thickness of the paper increases), and the thickness of the honeycomb paper generally increases from 0.3mm when the paper is initially die-cut to 3-6mm after the stretching.

In one embodiment, the frame 1 is connected with a frame beam 2, the upward paper-drawing roller 5 is connected with a first shaft 52, the lifting driving device 7 comprises a lifting beam 71, a lifting pull rod 72, a lifting spring 73 and a steel cable 74, one end of the lifting pull rod 72 is connected with the lifting beam 71, the other end of the lifting pull rod 72 is connected with the first shaft 52 through a first lifting slider 75, one end of the steel cable 74 is connected with the lifting beam 71, the other end of the steel cable 74 is connected with a steel cable 74 traction device, and the lifting spring 73 is arranged between the lifting beam 71 and the frame beam 2. The first lifting slider 75 is provided with a shaft hole, and a bearing is installed in the shaft hole and connected with the first shaft 52.

In one embodiment, the frame 1 is provided with a first slide rail, and the first lifting slider 75 is slidably connected to the first slide rail.

In one embodiment, referring to fig. 2-3, the cable traction device 76 includes a pressing roller cylinder 761, a long rocker arm 762 and a short rocker arm 763, the pressing roller cylinder 761 includes a cylinder 7611 and a push rod 7612 capable of extending and retracting along the cylinder 7611, one end of the long rocker arm 762 is hinged to the push rod 7612, the other end is hinged to one end of the short rocker arm 763 through a hinge shaft, and the other end of the short rocker arm 763 is connected to the cable 74.

When the upper drawing roller 5 needs to be driven to descend, a push rod 7612 of the pressing roller cylinder 761 extends out to drive a long rocker arm 762 to swing, the long rocker arm 762 drives a short rocker arm 763 to swing downwards, and when the short rocker arm 763 swings downwards, the steel cable 74 is driven to move downwards, so that the lifting beam 71 is pulled to move downwards, the lifting pull rod 72 and the first lifting slider 75 are driven to move downwards together, and the first shaft body 52 and the upper drawing roller 5 are driven to descend quickly together under the drive of the first lifting slider 75; during the lowering of the upper paper-drawing roller 5, the elastic force of the lifting spring 73 needs to be overcome.

When the upward drawing roller 5 is required to ascend and reset, the compression roller cylinder 761 releases exhaust immediately, so that under the elastic force action of the lifting spring 73, the lifting beam 71 and the lifting pull rod 72 are driven to be lifted quickly, the first lifting slider 75 is driven to ascend, the first shaft body 52 and the upward drawing roller 5 are driven to ascend together quickly until a preset height is reached, and therefore the gap between the upward drawing roller 5 and the downward drawing roller 6 is increased to be adaptive to the increased paper thickness. It should be noted that the elevation of the drawing roller 5 is to ensure that the needle 51 is always inserted into the paper slit on the drawing roller 5, and the needle 51 and the paper are not completely separated, and should not be inserted too deeply into the honeycomb paper to ensure the continuous drawing of the paper slit to form uniform and continuous honeycomb meshes, and to ensure that the formed honeycomb paper product can smoothly and continuously come out of the needle 51.

Referring to fig. 1, in order to prevent the honeycomb paper from being suddenly and accidentally pulled by the needle 51 during stretching, a manual pressing roller operating lever 16 may be further disposed on the right side of the frame 1 to manually drive the short rocker 763 to swing to realize the pulling of the steel cable 74, so as to facilitate the manual pressing roller operation at any time. The manual pinch roll operation immediately corrects the occasional stretch break failure described above and resumes the original continuous stretch forming process without stopping the machine.

In one embodiment, referring to fig. 1 and 7, the two ends of the lifting beam 71 are connected with the steel cables 74, the two ends of the hinge shaft in the steel cable 74 traction device are connected with the short rocker arms 763, the short rocker arm 763 at one end of the hinge shaft is connected with the steel cable 74 at one end of the lifting beam 71, and the short rocker arm 763 at the other end is connected with the steel cable 74 at the other end of the lifting beam 71, so as to synchronously drive the two short rocker arms 763 to move through the same hinge shaft. The above structure is advantageous for ensuring the lifting stability of the lifting beam 71.

When the cables 74 pass through the inside of the gear box 13 and the chain box 14, they are inserted into a stainless steel small pipe with a diameter of 10mm and can slide freely in the stainless steel small pipe. The stainless steel small conduits are respectively provided with a plurality of smooth weldless simmering bends with enough bending radius according to different shapes of the space capable of being penetrated inside the gear transmission case 13 and the chain transmission case 14.

The cable 74 may be connected with a turn buckle 24 to adjust the length and tension of the two cables 74 on both sides, so that the cables are stressed evenly and act synchronously.

Furthermore, a lifting spring 73 and a lifting pull rod 72 are arranged at both ends of the lifting beam 71, the first shaft bodies 52 are formed by extending both sides of the upper paper-drawing roller 5, and the first shaft bodies 52 are respectively connected with the corresponding lifting pull rods 72.

In one embodiment, a return spring (not shown) is connected between the push rod 7612 and the cylinder 7611 to automatically return the push rod 7612, and a tension spring 77 is connected between the long rocker arm 762 and the frame 1 to prevent the compression roller cylinder 761 from being excessively returned to cause the cable 74 to be loosened to cause the next compression roller operation to fail or to cause both sides to be out of synchronization. Under the combined action of the lifting spring 73, the return spring and the bottom tension spring 77, the paper pulling roller 5 can be effectively ensured to stably ascend and return, and when the steel cables are arranged at the two ends of the paper pulling roller 5, the two ends of the paper pulling roller can be effectively ensured to synchronously ascend and return, so that the paper pulling roller is finally returned to the height which is in accordance with the best stretching and forming work of the honeycomb paper.

In one embodiment, referring to fig. 8, the stretch forming machine further includes an adjusting screw 17 and a gap adjusting hand wheel 18, the frame beam 2 is connected with the adjusting screw 17 through a thread, the top end of the adjusting screw 17 is connected with the gap adjusting hand wheel 18, the bottom end of the adjusting screw 17 penetrates through the frame beam 2 and is connected with a second lifting slide block 19, the upper paper feeding roller 3 is connected with a second shaft body 31, the second lifting slide block 19 is connected with the second shaft body 31, and a gap adjusting pad 20 of the paper feeding roller is arranged between the second lifting slide block 19 and the frame beam 2. The upper part of the adjusting screw 17 is locked by a nut after passing through the frame beam 2. Wherein, the second lifting slide block 19 is also provided with a shaft hole, a bearing is arranged in the shaft hole, and the bearing is connected with the second shaft body 31.

Through rotating the gap adjusting hand wheel 18, the depth of the adjusting screw 17 screwed into the frame beam 2 can be adjusted, so that the height of the second lifting slide block 19 is changed, the second shaft body 31 and the upper paper feeding roller 3 are driven to lift together, the gap between the upper paper feeding roller 3 and the lower paper feeding roller 4 is changed, and the gap can be suitable for plane paper with different thicknesses.

The gap between the upper paper feed roller 3 and the lower paper feed roller 4 can be finely adjusted by replacing the paper feed roller gap adjusting pad 20 with different thickness.

In one embodiment, the frame 1 is provided with a second slide rail, and the second lifting slider 19 is slidably connected to the second slide rail.

In one embodiment, referring to fig. 8, the stretch forming machine further includes a gap adjusting jackscrew 21, the gap adjusting jackscrew 21 is connected with the frame beam 2 through a screw thread, the bottom end of the gap adjusting jackscrew 21 penetrates through the frame beam 2 and abuts against the first lifting slider 75, and a gap adjusting pad 22 for a paper drawing roller is arranged between the first lifting slider 75 and the frame beam 2. The highest elevation point of the upper draw roller 5 can be adjusted by replacing the draw roller gap adjustment pad 22 of different thickness.

After the lifting beam 71 rises to a preset height, the first lifting slider 75 is tightly abutted to the paper drawing roller gap adjusting pad 22 under the action of the elastic force of the lifting spring 73, at the moment, the paper drawing roller gap adjusting pad 22 is difficult to replace, the gap adjusting jackscrew 21 descends by rotating the gap adjusting jackscrew 21, the first lifting slider 75 can be pushed downwards for a certain distance, and at the moment, the paper drawing roller gap adjusting pad 22 can be replaced.

In one embodiment, the object stages 23 are disposed on both sides of the paper feeding roller set, the object stages 23 are disposed on both sides of the paper pulling roller set, and the object stages 23 are connected to the frame 1. The upper surface of the objective table 23 is a bearing surface for bearing the honeycomb paper, so that the honeycomb paper can be supported by the bearing surface in the process of entering the paper drawing roller set from the paper feeding roller set and outputting, namely the objective table 23 can bear the honeycomb paper in the process of stretching deformation, so that the honeycomb paper is prevented from being hung irregularly and is prevented from being separated from the needle-shaped members 51 on the paper drawing roller by accident and being uniformly drawn.

In one embodiment, referring to fig. 5, the end of the needle 51 that penetrates into the slit of the honeycomb paper is tapered to form a larger component force on the tapered surface to promote the honeycomb paper to slide and separate downwards along the needle wall, so that the honeycomb paper after stretch forming can be separated from the needle 51 on the upper draw roller 5 more smoothly and timely without damaging the meshes of the honeycomb paper.

In one embodiment, the distance between the paper feeding roller set and the stretching roller set is not too large, for example, the distance can be set to be about 120mm, so that the die-cut paper can be better ensured to be stretched and formed at a uniform and constant stretching speed, the mesh plane of the stretched and formed honeycomb paper can be better ensured to be uniformly and smoothly deformed, the mesh plane is not prone to wrinkle and warpage, and the opening size of each mesh can be better ensured to be uniform and consistent. The smaller distance between the paper feeding roller group and the paper pulling roller group also ensures that the head of the die cutting paper can be smoothly fed to the lower part of the paper pulling roller group by the paper feeding roller group without arching and accumulation.

In one embodiment, the frame 1 is also provided with a hood, and the paper feeding roller group and the paper pulling roller group are completely sealed in the hood;

the cover is provided with a paper feeding port and a paper outlet, and a paper feeding port for ensuring that the paper cut by the die can reach the position right below the paper feeding roller group is arranged in front of the paper feeding roller group; a paper outlet for ensuring the honeycomb paper to be correctly separated and sent out is arranged behind the paper pulling roller group;

an adjustable baffle device is arranged behind the paper drawing roller group on the machine cover, and a specially designed compressed air nozzle can be additionally arranged at the paper outlet when necessary, so that the formed honeycomb paper can be reliably and smoothly separated from the needle-shaped piece of the paper drawing roller 5 in time.

The following describes the honeycomb paper stretch forming process using kraft paper as an example:

firstly, a single piece of kraft paper is subjected to die cutting on an intermittent kerf array with a specific configuration on another special die cutting machine and is rewound into a roll, and at the moment, the whole piece of die-cut kraft paper is in a plane state (the thickness of the kraft paper is about 0.3 mm);

starting the stretch forming machine of the above embodiment, smoothly feeding the initial head of the die-cut kraft paper roll into the stretch forming machine of the above embodiment, namely, smoothly feeding the head of the kraft paper in a planar state with a slit array into the stretch forming machine between the upper paper feeding roller 3 and the lower paper feeding roller 4 of the paper feeding roller set, driving the planar kraft paper to move towards the paper drawing roller set by the rotation of the upper paper feeding roller 3 and the lower paper feeding roller 4, when the kraft paper head reaches the position right below the upper paper drawing roller 5, immediately driving the upper paper drawing roller 5 to descend by the lifting driving device 7 until a certain row of needle members 51 at the bottom of the upper paper drawing roller 5 can penetrate into the corresponding slits of the kraft paper head, and along with the rotation of the upper paper drawing roller 5, the kraft paper head enters into the initial stretching state, at the moment, the planar kraft paper starts to generate 3D spiral distortion and thickening, namely, the planar kraft paper starts to change to a three-dimensional state, the paper thickness begins to increase; then, the lifting driving device 7 immediately makes the upper drawing roller 5 rise and reset until it rises to the set height to adapt to the thickness change of the drawn kraft paper, the upper drawing roller 5 always keeps the needle-like member 51 to penetrate into the corresponding cutting seam in the process of rising to the set height, the upper drawing roller 5 and the kraft paper can not be completely separated to ensure that the kraft paper is always in a continuous drawing state, when the upper drawing roller 5 rises to the set height, the rising is stopped, at the moment, the gap between the upper drawing roller 5 and the lower drawing roller 6 is enough to just adapt to the maximum thickness of the drawn kraft paper (the paper thickness can reach 3-6mm in general), then, with the continuous rotation of the upper drawing roller 5, the needle-like member 51 can not be continuously penetrated into the corresponding cutting seam on the kraft paper, thereby the kraft paper can be promoted to advance while being drawn, and then the stable and continuous honeycomb paper drawing forming process can be carried out, until the whole roll of honeycomb paper is completely output. In the whole process of stretching and forming the honeycomb paper, the paper pulling roller group can not press any honeycomb paper meshes after the honeycomb paper is stretched and formed, thereby ensuring that the honeycomb paper product produced by the stretching and forming machine can not generate any undesirable distortion and warpage.

Note that the upper draw roller 5 is always in a rotating state during the lowering process, the raising process, and the process in which the raising of the upper draw roller 5 is stopped until the entire roll of kraft paper is completely fed out. The maximum lifting height range of the upper paper drawing roller 5 is preferably 0-10 mm, so that the production method is suitable for producing honeycomb paper with different specifications.

In the above process, in the process that the needle-shaped member 51 continuously penetrates into and breaks away from the corresponding cutting seam on the upper paper drawing roller 5, due to the linear velocity differential between the paper feeding roller set and the paper drawing roller set, the section of die-cutting paper between the paper feeding roller set and the paper drawing roller set is surely uniformly pulled and formed into honeycomb paper and is stably conveyed out, so that a stable stretch forming process of continuous paper feeding and continuous paper discharging is formed, and the cutting seam uniformly forms a three-dimensional 3D twisted honeycomb mesh.

According to the process, the honeycomb paper forming has two states, one state is the honeycomb paper which is subjected to die cutting and does not enter a stretching forming machine, at the moment, the whole paper is in a plane state (the paper thickness is about 0.3mm), and the cutting seam is basically in a closed state; the other type is honeycomb paper stretched by a stretch forming machine, at the moment, the whole paper is in a three-dimensional state, a joint seam is stretched into a uniform three-dimensional mesh shape, the peripheral edge of each mesh is subjected to uniform and consistent 3D torsion forming, the total thickness of the finished honeycomb paper after stretch forming is greatly increased, and the thickness can reach 3-6mm generally.

All meshes of each piece of honeycomb paper formed by stretching through the stretching forming machine are uniform; the overall plane of each piece of honeycomb paper is smoothly formed, and no local wrinkles or warps or local convex-concave bulges exist; the rectangular paper strips at the edges of all the meshes have uniform and consistent spiral 3D torsion configurations which are well formed.

The honeycomb paper stretch forming machine for filtering paint mist in the embodiment can realize smooth, uniform and continuous stretch forming of honeycomb paper, so that meshes of the formed honeycomb paper are uniform and regular, the 3D structural form and the integral forming uniformity of the meshes are effectively ensured, and the mesh surface of the honeycomb paper cannot generate warping distortion, so that the formed honeycomb paper has excellent paint mist filtering performance, and meets the requirements of high-efficiency catching and filtering of paint mist of a dry paint spray booth, thereby realizing the purpose of realizing high-efficiency paint mist filtering by utilizing recycled and regenerated kraft paper to replace a large amount of conventional polyester fiber filter cotton and glass fiber filter cotton, greatly reducing the paint mist filtering cost of various dry paint spray booths, greatly improving the paint mist filtering quality, being more beneficial to realizing environment-friendly emission, and greatly reducing the carbon emission equivalent of the dry paint spray booth paint mist filtering consumable material production, the subsequent pollution-free treatment of the paint mist filtering consumables is facilitated.

According to the paint mist filtering honeycomb paper stretch forming machine, the 3D forming quality of the produced reticulated honeycomb paper is high, the production efficiency is high, safety and reliability are achieved, and the reticulated honeycomb paper stretch forming machine can be matched with equipment such as a die-cutting machine, a paper rotating machine, a quilting machine and a stacking machine to form a highly automated flow production line. The honeycomb paper stretch forming machine has the advantages of low energy consumption, low carbon, environmental protection and basically no waste discharge in the stretch forming production process of the honeycomb paper.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.

Claims

1. The utility model provides a paint mist filters uses honeycomb paper stretch forming machine which characterized in that: including the frame, be connected with the roller set of form advancing and the drawing roller set in the frame, the roller set of form advancing includes the feed roll and feeds the roller down, go up the feed roll and form the clearance of holding honeycomb paper down between the feed roll, the same and the opposite rotation that turns to of the rotational speed of the feed roll of going up feed roll and feeding the roller down, the drawing roller set includes draw-roll and draw-down roller down, also form the clearance of holding honeycomb paper between draw-roll and the draw-down roller down, the same and the opposite rotation that turns to of the rotational speed of the feed roll of going up draw-roll and draw-down roller down, the rotational speed of draw-down roller is greater than the rotational speed of feed roll down, the surface of going up draw-roll is provided with a plurality of needle-like pieces that are used for pricking the joint-cutting on the honeycomb paper, it is connected with lift drive arrangement to go up draw-roll, carries out elevating movement by the drive arrangement drive.

2. The paint mist filtering honeycomb paper stretch-forming machine as claimed in claim 1, characterized in that: the paper feeding device is characterized by further comprising a power input shaft, the power input shaft is connected with the lower paper feeding roller through a first gear transmission mechanism, the lower paper feeding roller is connected with the upper paper feeding roller through a second gear transmission mechanism, the power input shaft is connected with the lower paper feeding roller through a third gear transmission mechanism, and the power input shaft is connected with the upper paper feeding roller through a chain transmission mechanism.

3. The paint mist filtering honeycomb paper stretch forming machine as claimed in claim 2, characterized in that: the chain transmission mechanism comprises a driving chain wheel, a driven chain wheel and a tension chain wheel, the driving chain wheel is connected with the driven chain wheel through a chain, the driving chain wheel is connected with the power input shaft, the driven chain wheel is connected with the paper pulling roll, and the tension chain wheel is meshed with the chain.

4. The paint mist filtering honeycomb paper stretch forming machine as claimed in claim 3, characterized in that: the tensioning chain wheel is connected with the frame through a tensioning adjusting device.

5. The paint mist filtering honeycomb paper stretch-forming machine as claimed in claim 1, characterized in that: the frame is also connected with a photoelectric sensor, and the photoelectric sensor is used for detecting the position of the honeycomb paper output by the paper feeding roller set.

6. The paint mist filtering honeycomb paper stretch-forming machine as claimed in claim 1, characterized in that: the paper feeding device is characterized in that a frame cross beam is connected to the frame, a first shaft body is connected to the paper pulling roll, the lifting driving device comprises a lifting cross beam, a lifting pull rod, a lifting spring and a steel cable, one end of the lifting pull rod is connected with the lifting cross beam, the other end of the lifting pull rod is connected with the first shaft body through a first lifting slider, one end of the steel cable is connected with the lifting cross beam, the other end of the steel cable is connected with a steel cable traction device, and the lifting spring is arranged between the lifting cross beam and the frame cross beam.

7. The paint mist filtering honeycomb paper stretch forming machine as claimed in claim 6, characterized in that: the steel cable traction device comprises a compression roller cylinder, a long rocker arm and a short rocker arm, wherein the compression roller cylinder comprises a cylinder body and a push rod capable of extending and retracting the cylinder body, one end of the long rocker arm is hinged to the push rod, the other end of the long rocker arm is hinged to one end of the short rocker arm through a hinge shaft, and the other end of the short rocker arm is connected with the steel cable.

8. The paint mist filtering honeycomb paper stretch-forming machine as claimed in claim 7, characterized in that: a return spring is connected between the push rod and the cylinder body, and a tension spring is connected between the long rocker arm and the rack.

9. The paint mist filtering honeycomb paper stretch forming machine as claimed in claim 6, characterized in that: still include adjusting screw and transfer the clearance hand wheel, frame crossbeam and adjusting screw are connected through the screw thread, adjusting screw's top with transfer the clearance hand wheel and be connected, adjusting screw's bottom is worn out behind the frame crossbeam and is connected with second lifting slide block, upward be connected with the second axle body on the paper feed roller, second lifting slide block with the second axle body is connected, it transfers the clearance pad to be provided with the paper feed roller between second lifting slide block and the frame crossbeam.

10. The paint mist filtering honeycomb paper stretch-forming machine as claimed in claim 1, characterized in that: the both sides of form advancing roller set all are provided with the objective table that is used for bearing honeycomb paper, the both sides of drawing roller set also all are provided with the objective table, the objective table is connected in the frame.