阅读说明：本技术 一种pu合成革真空吸纹机 (PU synthetic leather vacuum grain suction machine ) 是由 胡志坚 张德祥 于 2020-10-14 设计创作，主要内容包括：本发明公开了一种PU合成革真空吸纹机,旨在解决PU合成革采用挤压的方式进行压纹操作,压纹效果不佳,降低了产品质量的不足。该发明包括机架、转动安装在机架上的辊筒,辊筒外设置透气模纹筒,辊筒和透气模纹筒之间安装吸气筒,吸气筒内均布设有若干轴向设置的气道孔,吸气筒外壁上与每个气道孔均对应设有一排吸气孔,吸气孔与气道孔连通,辊筒两端分别设有气用旋转轴芯和水用旋转轴芯,气用旋转芯轴上连接有气用旋转接头,水用旋转芯轴上连接有水用旋转接头,吸气筒内设有水道孔,水道孔均与气用旋转芯轴连通,气道孔一端连接真空流量控制机构,真空流量控制机构均与气用旋转轴芯连通。(The invention discloses a vacuum embossing machine for PU synthetic leather, and aims to overcome the defects that the embossing effect is poor and the product quality is reduced when the PU synthetic leather is embossed in an extrusion mode. The air suction device comprises a rack and a roller rotatably mounted on the rack, wherein a breathable pattern cylinder is arranged outside the roller, an air suction cylinder is mounted between the roller and the breathable pattern cylinder, a plurality of axially arranged air channel holes are uniformly distributed in the air suction cylinder, a row of air suction holes are formed in the outer wall of the air suction cylinder and correspond to each air channel hole, the air suction holes are communicated with the air channel holes, an air rotating shaft core and a water rotating shaft core are respectively arranged at two ends of the roller, the air rotating shaft core is connected with an air rotating joint, the water rotating shaft core is connected with a water rotating joint, water channel holes are formed in the air suction cylinder, the water channel holes are communicated with the air rotating shaft core, one end of each air channel hole is connected with a vacuum flow control mechanism, and the vacuum flow control mechanisms are communicated with the.)

1. The utility model provides a line machine is inhaled in PU synthetic leather vacuum, which is characterized by, which comprises a frame, rotate the roller of installing in the frame, set up ventilative modular line section of thick bamboo outside the roller, install a section of thick bamboo of breathing in between roller and the ventilative modular line section of thick bamboo, the equipartition is equipped with the gas channel hole that a plurality of axial set up in the section of thick bamboo of breathing in, it all corresponds with every gas channel hole and is equipped with one row of suction hole to breathe in on the section of thick bamboo outer wall, suction hole and gas channel hole intercommunication, the roller both ends are equipped with gas respectively and use swivel spindle core and water swivel spindle core, be connected with gas rotary spindle on the gas with swivel spindle, be connected with water swivel spindle on the water swivel spindle, be equipped with the water channel hole in the section of thick bamboo of breathing in, the water channel hole all communicates with.

2. The vacuum vein sucking machine for PU synthetic leather according to claim 1, wherein the vacuum flow control mechanism comprises a base, a valve sleeve, a push rod, the base is provided with an air inlet hole and an air outlet hole which are communicated with each other, the air outlet hole is communicated with the pneumatic rotating shaft core, the air inlet hole is communicated with the air passage hole, the valve sleeve is slidably mounted between the air inlet hole and the air outlet hole, a pre-tightening spring is mounted between the valve sleeve and the base, the push rod is connected with the valve sleeve, the base is provided with a fixed disk, the fixed disk is provided with an arc-shaped control convex strip and an arc-shaped air stop convex strip, the two sides of the air stop convex strip on the surface of the fixed disk are both provided with arc-shaped racks, the base is provided with a driving gear, the driving gear can be in transmission with the arc-, the end part of the push rod can slide to the surfaces of the control convex strip and the air stop convex strip to enable the valve sleeve to close the exhaust hole, and the shaking convex strip rotates along with the driving gear and continuously slides through the push rod to enable the push rod to shake.

3. The vacuum grain sucking machine for PU synthetic leather according to claim 2, wherein the control rib has an adjustable length, the control rib comprises a left moving rib and a right moving rib, the fixed disk is provided with two arc-shaped sliding grooves, the two sliding grooves are correspondingly matched with the left moving rib and the right moving rib respectively, and the lengths of the left moving rib and the right moving rib are smaller than the lengths of the sliding grooves; the left end of the left moving convex strip and the right end of the right moving convex strip are both provided with guide sections which are obliquely arranged.

4. The vacuum vein absorbing machine for PU synthetic leather according to claim 2, wherein the air-stop convex strips are provided with transition sections at the left and right ends thereof.

5. The vacuum vein sucking machine for PU synthetic leather according to any one of claims 1 to 4, wherein an air chamber is arranged inside the roller, an air suction passage and an air inflation pipe are arranged in the air rotating mandrel, the air suction passage is communicated between the air rotating joint and the vacuum flow control mechanism, the air inflation pipe is communicated between the air rotating joint and the air chamber, and the air chamber is communicated with the outer surface of the roller.

6. The vacuum vein sucking machine for PU synthetic leather according to claim 5, wherein the pneumatic rotary joint comprises a joint body and a rotary sleeve, a vacuum chamber is arranged in the joint body, one end of the rotary sleeve is rotatably mounted at one end of the joint body, the other end of the rotary sleeve is tightly connected with the pneumatic rotary mandrel, an inflation chamber is arranged at the other end of the joint body, the end part of the inflation chamber passes through the vacuum chamber and is rotatably mounted at the position of the inflation chamber, a sealing sleeve capable of axially moving is tightly sleeved in the vacuum chamber, a positioning spring is connected between the sealing sleeve and the joint body, an outer fixed sealing ring and an inner fixed sealing ring are mounted on the end surface of the sealing sleeve, an outer rotary sealing ring and an inner rotary sealing ring are mounted on the end surface of the rotary sleeve, the outer; the inner wall of the pushing ring is obliquely arranged, the pushing surface is attached to the inner wall of the pushing ring, an extension rod is connected to the sliding column, a ratchet bar is connected to the extension rod, a pawl is installed in the sealing sleeve, and the end portion of the pawl is inserted into the ratchet bar.

7. The vacuum vein absorbing machine for PU synthetic leather according to claim 6, wherein the extension rod penetrates through the pushing ring, the end of the inner fixed sealing ring is of an outer convex arc structure, and the end of the inner rotary sealing ring is of an inner concave arc structure.

8. The vacuum vein absorbing machine for PU synthetic leather according to claim 6, wherein a connecting sleeve is installed between the rotating sleeve and the pneumatic rotating mandrel, a convex ring is installed on the inner wall of the connecting sleeve, and sealing gaskets are installed between both sides of the convex ring and the rotating sleeve and the pneumatic rotating mandrel.

9. The vacuum vein sucking machine for PU synthetic leather according to claim 8, wherein the end of the rotating sleeve and the end of the pneumatic rotating mandrel are both provided with a connecting flange, the two connecting flanges are tightly connected by a screw, the edge of the two connecting flanges is hermetically connected with the air leakage detecting air bag, and the outer wall of the screw is provided with a poking needle.

10. The vacuum vein sucking machine for PU synthetic leather according to claim 6, wherein the inflation chamber is internally and hermetically provided with an axially movable abutting sleeve, an abutting spring is arranged between the inflation chamber and the abutting sleeve, the abutting sleeve and the end surface of the inflation tube are respectively provided with an end surface sealing gasket, and the two end surface sealing gaskets are attached and sealed.

Technical Field

The invention relates to a synthetic leather processing technology, in particular to a vacuum grain sucking machine for PU synthetic leather.

Background

The existing synthetic leather adopts an embossing process in the production process, embossing equipment is utilized to extrude on production materials such as PU and the like, and texture flower shapes are formed on the production materials through steel wheels, nickel wheels, silica gel wheels and the like on the equipment. The embossing process needs to bear 3kg of pressure on each square centimeter of production material, so that the thickness of the synthetic leather material is easily reduced, and the hand feeling becomes rigid. The subsequent graining process is required to be adopted for treatment, which increases the production cost, and the graining after the chemical additive is added generates a large amount of industrial wastewater. In conclusion, the embossing operation is performed on production materials such as PU and the like in an extrusion mode, the embossing effect is poor, and the product quality is reduced.

Disclosure of Invention

The vacuum grain sucking machine for the PU synthetic leather overcomes the defects that the PU synthetic leather is embossed by adopting an extrusion mode, the embossing effect is poor, and the product quality is reduced, has good grain sucking effect, is not easy to generate the phenomenon of grain rebound, and is beneficial to improving the product quality.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a line machine is inhaled in PU synthetic leather vacuum, which comprises a frame, rotate the roller of installing in the frame, the roller sets up ventilative die line section of thick bamboo outward, install a section of thick bamboo of breathing in between roller and the ventilative die line section of thick bamboo, the equipartition is equipped with the gas channel hole that a plurality of axial set up in the section of thick bamboo of breathing in, it all corresponds with every gas channel hole and is equipped with one row of suction hole to breathe in on the section of thick bamboo outer wall, suction hole and gas channel hole intercommunication, the roller both ends are equipped with gas respectively and use the swivel spindle core and water and use the swivel spindle core, gas is connected with gas rotary spindle and uses rotary joint, water is connected with water rotary spindle and uses rotary joint, be equipped with the water channel hole in the section of thick bamboo of breathing in, the water channel hole all communicates with.

When the PU synthetic leather vacuum grain sucking machine works, the PU synthetic leather is wound on the outer wall of the air-permeable pattern cylinder, and the roller rotates to drive the air-permeable pattern cylinder to rotate so as to drive the PU synthetic leather to run. The vacuum pump is adopted to suck air through the air rotary joint, so that the air channel hole and the air suction hole form vacuum negative pressure, and the air-permeable pattern cylinder has high air permeability and can also form vacuum negative pressure in the air-permeable pattern cylinder and on the outer surface of the air-permeable pattern cylinder. When the preheated PU synthetic leather passes through the rotating air-permeable pattern cylinder, the PU synthetic leather is sucked on the outer surface of the air-permeable pattern cylinder through the pressure difference between the atmospheric pressure and the vacuum negative pressure on the outer surface of the air-permeable pattern cylinder, and suction patterns matched with the outer surface of the air-permeable pattern cylinder are formed on the PU synthetic leather. In the line suction process, cooling water is filled into the water rotary joint, and the water rotary joint and the water rotary mandrel can dredge the cooling water without influencing the rotation of the water rotary joint. And cooling water circulates in the air suction cylinder along the water channel hole and cools the air suction cylinder, so that the air-permeable pattern cylinder and the PU synthetic leather are cooled in time, and the pattern-suction rebound is avoided. The vacuum suction lines are adopted, so that the PU synthetic leather can be prevented from being subjected to overlarge pressure, the material is prevented from losing the thickness of the PU synthetic leather, and the product quality is ensured. The PU synthetic leather adopts the mode of vacuum line suction to carry out the processing of line, and it is effectual to inhale the line, is difficult for appearing the phenomenon that the line kick-backs, is favorable to improving product quality.

Preferably, the vacuum flow control mechanism comprises a base, a valve sleeve and a push rod, wherein the base is provided with an air inlet hole and an air outlet hole which are communicated with each other, the air outlet hole is communicated with the air-used rotating shaft core, the air inlet hole is communicated with the air passage hole, the valve sleeve is slidably arranged between the air inlet hole and the air outlet hole, a pre-tightening spring is arranged between the valve sleeve and the base, the push rod is connected with the valve sleeve, the base is provided with a fixed disc, the fixed disc is provided with an arc-shaped control convex strip and an arc-shaped air stop convex strip, arc-shaped racks are respectively arranged on two sides of the air stop convex strip on the surface of the fixed disc, a drive gear is arranged on the base and can be matched with the arc-shaped racks for transmission, the end surface of the drive gear is provided with a plurality of arc, the shaking convex strips rotate along with the driving gear and continuously slide through the ejector rod to shake the push rod.

The vacuum flow control mechanism rotates along with the air suction cylinder, the length of the convex strip is adjusted and controlled according to the angle of the air-permeable pattern cylinder coated by the PU synthetic leather, and vacuum negative pressure cannot be formed on the outer wall of the air-permeable pattern cylinder which is not coated by the PU synthetic leather. When the end part of the push rod slides to the surfaces of the control convex strip and the air stop convex strip, the valve sleeve closes the exhaust hole, and negative pressure cannot be formed in the air passage hole corresponding to the vacuum flow control mechanism at the moment. The vacuum flow control mechanism rotates along with the air suction cylinder, after the PU synthetic leather is coated on the outer wall of the air-permeable pattern cylinder, the end part of the push rod corresponding to the position of the PU synthetic leather is firstly supported on the end surface of the fixed disk, the exhaust hole is completely opened at the moment, the pressure difference between the atmospheric pressure and the vacuum negative pressure on the outer surface of the air-permeable pattern cylinder is large, the adsorption force is large, and the air suction pattern is easily formed on the surface of the PU synthetic leather. When the push rod slides arc rack position, drive gear and arc rack cooperation transmission, drive gear rotates and makes the shake sand grip constantly slide the ejector pin, thereby make the push rod produce the effect of shake, the opening continuous change in exhaust hole this moment, that is to say, the pressure difference continuous change between the vacuum negative pressure of atmospheric pressure and ventilative mould line section of thick bamboo external surface, to the vacuum adsorption affinity continuous change on PU synthetic leather surface, avoid the too big and cause the damage to PU synthetic leather surface line position of inhaling, a slack and a relaxation, it is effectual to inhale the line, the difficult rebound phenomenon that appears. And then, the end part of the push rod slides to the surface of the air stopping raised line to enable the valve sleeve to close the exhaust hole, negative pressure cannot be formed in the air passage hole to suck grains on the surface of the PU synthetic leather, the grains sucked by vacuum adsorption on the surface of the PU synthetic leather in the earlier stage are released for releasing pressure and releasing, and the later stage grain sucking rebound is avoided. And then the push rod slides on the surface of the fixed disk, the exhaust hole is completely opened, the pressure difference between the atmospheric pressure and the vacuum negative pressure on the outer surface of the air-permeable pattern cylinder is large, the PU synthetic leather surface is vacuumized again to absorb the patterns, then the drive gear slides through the arc-shaped rack together, the push rod shakes, finally the push rod slides on the control convex strip, the pressure difference disappears, the PU synthetic leather leaves the air-permeable pattern cylinder, and the vacuum pattern absorption is completed. The PU synthetic leather processed by the method has the advantages of line absorption on the surface, good quality and no rebound phenomenon.

Preferably, the control raised lines are adjustable in length, each control raised line comprises a left-moving raised line and a right-moving raised line, two arc-shaped sliding grooves are formed in the fixed disc, the two sliding grooves are correspondingly matched with the left-moving raised lines and the right-moving raised lines respectively, and the lengths of the left-moving raised lines and the right-moving raised lines are smaller than those of the sliding grooves; the left end of the left moving convex strip and the right end of the right moving convex strip are both provided with guide sections which are obliquely arranged.

The length of the control convex strip is adjusted according to the wrap angle size of the PU synthetic leather coated on the breathable pattern cylinder, the convex strip is moved leftwards, the convex strip is moved rightwards and slides in the sliding groove, the adjustment is convenient, and the guide section plays a good role in guiding the push rod.

Preferably, the left end and the right end of the air stop protruding strip are provided with transition sections which are obliquely arranged. The transition section plays a guiding role for the push rod.

Preferably, an air chamber is arranged in the roller, an air pumping channel and an air charging pipe are arranged in the air rotating mandrel, the air pumping channel is communicated between the air rotating joint and the vacuum flow control mechanism, the air charging pipe is communicated between the air rotating joint and the air chamber, and the air chamber is communicated with the outer surface of the roller.

The air is filled into the rotary joint for air, so that the air enters the air chamber through the inflation tube, the air filled in the air chamber is discharged from the outer surface of the roller due to the conduction of the air chamber and the outer surface of the roller, the outward-expanding air pressure is formed on the outer surface of the roller, the air suction tube on the outer surface of the roller is expanded and supported by the outward-expanding air pressure, and the air suction tube is tightly attached and fixed with the air-permeable pattern tube on the outer side of the air suction tube.

Preferably, the pneumatic rotary joint comprises a joint body and a rotary sleeve, wherein a vacuum chamber is arranged in the joint body, one end of the rotary sleeve is rotatably arranged at one end of the joint body, the other end of the rotary sleeve is tightly connected with a pneumatic rotary mandrel, an inflation chamber is arranged at the other end of the joint body, the end part of the inflation tube penetrates through the vacuum chamber and is rotatably arranged at the position of the inflation chamber, a sealing sleeve capable of axially moving is tightly sleeved in the vacuum chamber, a positioning spring is connected between the sealing sleeve and the joint body, an outer fixed sealing ring and an inner fixed sealing ring are arranged on the end surface of the sealing sleeve, an outer rotary sealing ring and an inner rotary sealing ring are arranged on the end surface of the rotary sleeve; the inner wall of the pushing ring is obliquely arranged, the pushing surface is attached to the inner wall of the pushing ring, an extension rod is connected to the sliding column, a ratchet bar is connected to the extension rod, a pawl is installed in the sealing sleeve, and the end portion of the pawl is inserted into the ratchet bar.

The vacuum pump carries out evacuation to the vacuum chamber, the air current flows to the vacuum chamber from the exhaust passage of gas with rotatory dabber at this in-process, thereby drive the blade and rotate, and then make the ring rotate, receive the effect of centrifugal force, centrifugal ball, centrifugal spring radially outwards remove along the installation section of thick bamboo, thereby make and promote piece butt on the propelling movement ring tightly, the trend that has outside promotion to the propelling movement ring, internal fixation sealing ring and internal rotation sealing ring appear wearing and tearing back at long-time mutual rotation in-process, internal fixation sealing ring is promoted by the inward rotation sealing ring direction, ensure that internal fixation sealing ring and internal rotation sealing ring are sealed the laminating all the time and are in the same place. The outer fixed sealing ring is in sealing fit with the outer rotating sealing ring, the inner fixed sealing ring is in sealing fit with the inner rotating sealing ring, and the sealing performance between the rotating sleeve and the sealing sleeve in the rotating process is improved and the air leakage phenomenon is avoided through two sealing arrangements. The end part of the pawl is inserted on the ratchet bar, so that the sliding column can move in one direction only towards the direction of the inner rotating sealing ring and cannot move in the opposite direction, the reliable attachment of the inner fixing sealing ring and the inner rotating sealing ring is ensured, and the sealing performance is ensured.

Preferably, the extension rod penetrates through the pushing ring, the end face of the inner fixing sealing ring is of an outer convex arc structure, and the end face of the inner rotating sealing ring is of an inner concave arc structure. The arrangement ensures that the contact area between the end surface of the internal fixed sealing ring and the end surface of the internal rotating sealing ring is large, and the contact sealing performance is good.

Preferably, a connecting sleeve is arranged between the rotating sleeve and the pneumatic rotating mandrel, a convex ring is arranged on the inner wall of the connecting sleeve, and sealing gaskets are arranged between two sides of the convex ring and the rotating sleeve and between the two sides of the convex ring and the pneumatic rotating mandrel. The sealing performance of the connecting position of the rotating sleeve and the gas-used rotating mandrel is good.

Preferably, the end part of the rotating sleeve and the end part of the air-operated rotating core shaft are both provided with a connecting flange, the two connecting flanges are tightly connected through a screw, the edges of the two connecting flanges are hermetically connected with an air leakage detection air bag, and the outer wall of the screw is provided with a poking needle.

When the air leakage phenomenon appears at the connecting position of the rotating sleeve and the air-operated rotating mandrel, the air leakage detection air bag is sucked inwards and is punctured by the puncture needle to make a sound, and an operator is reminded of the occurrence of the air leakage phenomenon.

Preferably, the abutting sleeve capable of axially moving is hermetically arranged in the inflation cavity, the abutting spring is arranged between the inflation cavity and the abutting sleeve, end face sealing gaskets are arranged on the abutting sleeve and the end face of the inflation tube, and the two end face sealing gaskets are attached and sealed. The structural arrangement ensures the sealing performance of the end part of the inflation tube in the rotation process.

Compared with the prior art, the invention has the beneficial effects that: (1) the PU synthetic leather is processed with lines in a vacuum line suction mode, the line suction effect is good, the phenomenon of line rebound is not easy to occur, and the product quality is favorably improved; (2) the gas rotary joint has good sealing performance in the working process and is not easy to leak gas.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of FIG. 1 of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic end view of a holding pan of the present invention;

FIG. 5 is a schematic structural view of a fixing plate of the present invention;

FIG. 6 is a schematic structural view of the vacuum flow control mechanism of the present invention;

FIG. 7 is a schematic view of the construction of the pneumatic swivel of the present invention;

FIG. 8 is an enlarged partial schematic view of FIG. 6 of the present invention;

in the figure: 1. a frame, 2, a roller, 3, a ventilated pattern cylinder, 4, air channel holes, 5, a suction cylinder, 6, a pneumatic rotating shaft core, 7, a hydraulic rotating shaft core, 8, a pneumatic rotating joint, 9, a hydraulic rotating joint, 10, water channel holes, 11, a ventilated annular cavity, 12, a water-through annular cavity, 13, a water-through pipe, 14, a water-return channel, 15, an aluminum row, 16, an air channel hole joint, 17, a water-collecting cavity, 18, a water channel hole joint, 19, a pneumatic fixed end cover, 20, a hydraulic fixed end cover, 21, a machine base, 22, a valve sleeve, 23, a push rod, 24, an air inlet hole, 25, an air outlet hole, 26, a pre-tightening spring, 27, a fixed disk, 28, a control convex strip, 29, an air stopping convex strip, 30, an arc-shaped rack, 31, a driving gear, 32, a shaking convex strip, 33, a push rod, 34, a blowing box, 35, an air curtain air outlet, a left moving convex strip, 37, a right moving convex strip, 39. the air leakage detection device comprises a guide section 40, a guide wheel 41, a leather sleeve 42, an air chamber 43, an air pumping channel 44, an inflation tube 45, a connector body 46, a rotating sleeve 47, a vacuum chamber 48, an inflation chamber 49, a sealing sleeve 50, a positioning spring 51, an outer fixed sealing ring 52, an inner fixed sealing ring 53, an outer rotating sealing ring 54, an inner rotating sealing ring 55, a pushing ring 56, a sliding column 57, a ring 58, a blade 59, a mounting cylinder 60, a centrifugal ball 61, a centrifugal spring 62, a pushing block 63, an extension rod 64, a ratchet rack 65, a pawl 66, a connecting sleeve 67, a convex ring 68, a sealing gasket 69, a connecting flange 70, an air leakage detection air bag 71, a poking needle 72, an abutting sleeve 73, an abutting spring 74, an air pumping port 75, an inflation port 76 and a positioning frame.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

example 1: the utility model provides a PU synthetic leather vacuum vein suction machine (see attached figure 1 to attached figure 8), which comprises a frame 1, rotate the roller 2 of installing in the frame, set up ventilative modular pattern section of thick bamboo 3 outside the roller, install a section of thick bamboo 5 of breathing in between roller and the ventilative modular pattern section of thick bamboo, the equipartition is equipped with the gas channel hole 4 of a plurality of axial settings in the section of thick bamboo of breathing in, it all corresponds with every gas channel hole and is equipped with one row of suction hole to breathe in on the section of thick bamboo outer wall, suction hole and gas channel hole intercommunication, the roller both ends are equipped with gas respectively and use swivel spindle core 6 and water swivel spindle core 7, be connected with gas on the gas swivel spindle and use swivel joint 8, be connected with water swivel joint 9 on the water swivel spindle, be equipped with water channel hole 10 in the section of thick bamboo of breathing in, the water channel hole all communicates with gas swivel spindle, vacuum. A gear is arranged outside the pneumatic rotating shaft core, a motor is arranged on the frame, and the motor drives the gear to rotate, so that the rotation of the roller is realized. The air-permeable pattern cylinder is made of ceramic materials, and the ceramic materials have high air permeability and are convenient for surface pattern forming.

The air rotating shaft core and the water rotating shaft core are respectively and rotatably arranged on the two racks, and the air rotating shaft core is provided with a ventilation annular cavity 11. The water rotating shaft core is provided with a water circulating ring cavity 12, a water pipe 13 and a water return channel 14, and the water return channel is communicated with the water circulating ring cavity. Be equipped with intake antrum and the play water cavity of mutual isolation in the rotary joint for water, the water service pipe tip rotates and installs in the intake antrum, and return water passageway and return water chamber intercommunication, the rotation of gas is installed in the return water intracavity with the rotating shaft core tip.

The section of thick bamboo of breathing in is for being arranged 15 tubular structure that form around by the aluminium, and the cross-section that the aluminium was arranged is fan ring shape, and the outward flange and the inward flange that are the same radian of aluminium row promptly are opened in the outward flange that the inside of aluminium row is close to the aluminium row has two air flue holes promptly surface department, and the air flue hole switches on mutually through the surface of breathing in hole and aluminium row. The air passage hole is closed at one end and connected with an air passage hole joint 16 at the other end. The roller is internally provided with a water collecting cavity 17, the water service pipe is communicated with the water collecting cavity, one end of the water channel hole is communicated with the water service ring cavity through a water channel hole joint 18 after the water channel hole is circuitous in the aluminum row, and the other end of the water channel hole is communicated with the water collecting cavity through a connecting pipe. One end of the air suction cylinder close to the air rotating mandrel is provided with an air fixing end cover 19; one end of the air suction cylinder close to the water rotating mandrel is provided with a water fixing end cover 20. The side of the aluminum row is sequentially attached to surround the aluminum row, the air passage hole joint penetrates through the air fixing end cover, and the water passage hole joint and the connecting pipe penetrate through the water fixing end cover. The gas is with fixed end cover to air flue hole joint carry out fixed stay, and water is with fixed end cover to water flue hole joint, connecting pipe carry out fixed stay.

The vacuum flow control mechanism comprises a base 21, a valve sleeve 22 and a push rod 23, wherein the base is provided with an air inlet 24 and an air outlet 25 which are communicated with each other, the air outlet is communicated with an air-used rotating shaft core through an air annular cavity, the air inlet is communicated with an air passage hole through an air passage hole joint, the valve sleeve is slidably arranged between the air inlet and the air outlet, a pre-tightening spring 26 is arranged between the valve sleeve and the base, and the push rod is connected with the valve sleeve. The valve sleeve is supported under the action of the pre-tightening spring, so that the exhaust hole is completely opened.

Install fixed disk 27 on the frame, be equipped with curved control sand grip 28 and curved gas check sand grip 29 on the fixed disk, the fixed disk is on the surface gas check sand grip both sides all install arc rack 30, install drive gear 31 on the frame, drive gear can with arc rack cooperation transmission, be equipped with a plurality of curved shake sand grip 32 on the drive gear terminal surface, the shake sand grip sets up along drive gear direction of rotation slope, be equipped with ejector pin 33 on the push rod, the ejector pin laminating is on the drive gear terminal surface, the push rod tip slidable makes the closed exhaust hole of valve barrel on control sand grip and the gas check sand grip surface, the shake sand grip rotates and constantly slips the ejector pin along with drive gear and makes the push.

The frame is provided with a long-strip-shaped air blowing box 34 corresponding to the arc-shaped rack on the fixed disc, and the air blowing box is provided with a long-strip-shaped air curtain air outlet 35 blowing air towards the air-permeable pattern cylinder. The air curtain air outlet is axially arranged.

The length of the control convex strip is adjustable, the control convex strip comprises a left moving convex strip 36 and a right moving convex strip 37, two arc-shaped sliding grooves 38 are formed in the fixed disc, the two sliding grooves are correspondingly matched with the left moving convex strip and the right moving convex strip respectively, and the lengths of the left moving convex strip and the right moving convex strip are smaller than those of the sliding grooves; the left end of the left moving convex strip and the right end of the right moving convex strip are both provided with guide sections 39 which are obliquely arranged. Two guide wheels 40 are mounted at the end of the push rod and can be respectively attached to the surfaces of the left moving convex strip and the right moving convex strip. Both ends all are equipped with the changeover portion of slope setting about ending the gas sand grip.

The roller is internally provided with an air chamber 42, an air pumping channel 43 and an air charging pipe 44 are arranged in the air rotating mandrel, the air pumping channel is communicated between the air rotating joint and the vacuum flow control mechanism, the air charging pipe is communicated between the air rotating joint and the air chamber, the air chamber is communicated with the outer surface of the roller, a plurality of air vents are arranged on the inner wall of the roller, and the air vents are communicated with the outer wall of the roller. Install leather sheath 41 between roller outer wall and the section of thick bamboo inner wall of breathing in, the leather sheath of roller surface receives the expansion force of the gas that is provided by the air vent and expands, the expansion of leather sheath exerts outside expanded expansion force for the section of thick bamboo of breathing in of the leather sheath outside, the internal surface of each aluminium row all receives outside expanded expansion force promptly, utilize this outside expanded expansion force to make the external surface of the section of thick bamboo of breathing in can closely laminate at the internal surface of ventilative pattern section of thick bamboo, overcome the frictional force between ventilative pattern section of thick bamboo and the section of thick bamboo of breathing in, realize the section of thick bamboo of breathing in to the fixed of ventilative pattern section of thick bamboo.

The pneumatic rotary joint comprises a joint body 45 and a rotary sleeve 46, wherein a vacuum chamber 47 is arranged in the joint body, one end of the rotary sleeve is rotatably arranged at one end of the joint body, the other end of the rotary sleeve is tightly connected with a pneumatic rotary mandrel, an inflation chamber 48 is arranged at the other end of the joint body, the end part of the inflation tube passes through the vacuum chamber and is rotatably arranged at the position of the inflation chamber, a sealing sleeve 49 which can move axially is tightly sleeved in the vacuum chamber, a positioning spring 50 is connected between the sealing sleeve and the joint body, an outer fixed sealing ring 51 and an inner fixed sealing ring 52 are arranged on the end surface of the sealing sleeve, an outer rotary sealing ring 53 and an inner rotary sealing ring 54 are arranged on the end surface of the rotary sleeve; the inner wall of the push ring is obliquely arranged, the push surface is attached to the inner wall of the push ring, the slide column is connected with an extension rod 63, the extension rod is connected with a ratchet bar 64, a pawl 65 is installed in the sealing sleeve, and the end part of the pawl is inserted in the ratchet bar. The extension rod penetrates through the push ring, the end face of the inner fixed sealing ring is of an outer convex arc structure, and the end face of the inner rotary sealing ring is of an inner concave arc structure.

A connecting sleeve 66 is arranged between the rotating sleeve and the pneumatic rotating mandrel, a convex ring 67 is arranged on the inner wall of the connecting sleeve, and sealing gaskets 68 are arranged between the two sides of the convex ring and the rotating sleeve and the pneumatic rotating mandrel. The end part of the rotating sleeve and the end part of the gas-using rotating core shaft are both provided with a connecting flange 69, the two connecting flanges are tightly connected through a screw, the edges of the two connecting flanges are hermetically connected with a gas leakage detection air bag 70, and the outer wall of the screw is provided with a poking needle 71. But the sealed butt cover 72 of installing axial displacement in the inflation cavity, install butt spring 73 between inflation cavity and the butt cover, all install the sealed pad of terminal surface on the terminal surface of butt cover and gas tube, the sealed pad laminating of both ends face is sealed. The connector body is provided with an air suction port 74 communicated with the vacuum chamber, and the connector body is provided with an air charging port 75 communicated with the air charging chamber. A positioning frame 76 is arranged on the outer wall of the inflation tube, the positioning frame comprises an inner ring and an outer ring, a plurality of connecting ribs are uniformly distributed and connected between the inner ring and the outer ring, the inner ring is tightly connected with the inflation tube, and the outer ring is matched with the air suction channel.

When the PU synthetic leather vacuum grain sucking machine works, the PU synthetic leather is wound on the outer wall of the air-permeable pattern cylinder, and the roller rotates to drive the air-permeable pattern cylinder to rotate so as to drive the PU synthetic leather to run. The vacuum pump is adopted to suck air through the air rotary joint, so that the air channel hole and the air suction hole form vacuum negative pressure, and the air-permeable pattern cylinder has high air permeability and can also form vacuum negative pressure in the air-permeable pattern cylinder and on the outer surface of the air-permeable pattern cylinder. When the preheated PU synthetic leather passes through the rotating air-permeable pattern cylinder, the PU synthetic leather is sucked on the outer surface of the air-permeable pattern cylinder through the pressure difference between the atmospheric pressure and the vacuum negative pressure on the outer surface of the air-permeable pattern cylinder, and suction patterns matched with the outer surface of the air-permeable pattern cylinder are formed on the PU synthetic leather. In the line suction process, cooling water is filled into the water rotary joint, and the water rotary joint and the water rotary mandrel can dredge the cooling water without influencing the rotation of the water rotary joint. And cooling water circulates in the air suction cylinder along the water channel hole and cools the air suction cylinder, so that the air-permeable pattern cylinder and the PU synthetic leather are cooled in time, and the pattern-suction rebound is avoided. The vacuum suction lines are adopted, so that the PU synthetic leather can be prevented from being subjected to overlarge pressure, the material is prevented from losing the thickness of the PU synthetic leather, and the product quality is ensured. The PU synthetic leather adopts the mode of vacuum line suction to carry out the processing of line, and it is effectual to inhale the line, is difficult for appearing the phenomenon that the line kick-backs, is favorable to improving product quality.

The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.