Pressing and edge cutting integrated device for PVC (polyvinyl chloride) inflatable bed and manufacturing method of PVC inflatable bed

Abstract

The invention discloses a pressing and edge cutting integrated device for a PVC (polyvinyl chloride) inflatable bed and a manufacturing method of the PVC inflatable bed, and relates to the related technical field of inflatable bed production, the pressing and edge cutting integrated device comprises a rack, a pressing part and a paving part are arranged on the rack, and the paving part comprises a lower pressing plate and a pressing frame which are movably arranged in the direction of entering and exiting from the pressing part; the pressing frame can be vertically and movably arranged on the lower pressing plate through the supporting frame, during pressing, the PVC inflatable bed is tightened on the pressing frame so as to perform pressing treatment between the lower pressing plate and the upper pressing plate of the pressing part, and the edge pressing assembly comprises two outer pressing plates and an inner supporting plate which are arranged on the supporting frame and correspond to the edges of the pressing frame. The two outer pressing plates are arranged on the supporting frame in a swinging mode, the outer pressing plates and the inner supporting plates are matched to clamp the edge portion of the PVC inflatable bed, the inner supporting plates are arranged on the supporting frame in a sliding mode, first elastic pieces are arranged between the inner supporting plates and the supporting frame in the sliding direction, the inner supporting plates abut against the outer side wall of the pressing frame, and the outer pressing plates do not make contact with the outer side wall of the pressing frame.

Description

Technical Field

[0001] The invention relates to the technical field related to the production of inflatable beds, and in particular to a PVC inflatable bed pressing and trimming integrated device and a PVC inflatable bed manufacturing method. Background Art

[0002] As is known, PVC inflatable mattress is an inflatable sleeping product made of polyvinyl chloride (PVC) material, which is usually used for outdoor camping, travel or as a temporary mattress due to its portability, comfort, adaptability and lightness. PVC inflatable mattress is mainly composed of an inflatable liner made of polyvinyl chloride (PVC) material, an outer layer made of suede or non-slip material, and a valve for inflation and deflation.

[0003] In the process of making an inflatable bed, the inflatable liner is composed of an upper and lower layer plus a middle layer connecting the upper and lower layers. The upper and lower layers and the middle layer are pressed together by hot melting on a pressing machine. In this way, there needs to be a margin at the pressing edge to make the pressing width meet the requirements to ensure that the pressing is firm. The excess edge part after pressing is generally removed by manual hand-held cutting knife. This will not only cause uneven cutting, but also affect the processing and production efficiency of the inflatable bed. Therefore, a solution is proposed in the patent with announcement number CN220980050U, announcement date May 17, 2024, and titled "A Sealing and Bonding Device for an Inflatable Bed". , that is, an inflatable bed sealing and bonding device, including a bracket and a leg, the top outer wall of the bracket is fixedly connected with a pressure plate, and a placement groove is opened on the opposite side of the legs, a fixing frame is fixed in the placement groove by bolts, a gap is left between the pressure plate and the fixing frame, the top outer wall of the leg is threadedly connected with a pillar, the top outer walls of every two pillars are threadedly connected with the same load-bearing plate, the top outer wall of the load-bearing plate is fixed with a press by bolts, a frame is provided at the bottom of the piston rod of the press, and a bonding and cutting mechanism is provided at the bottom of the frame, the bonding and cutting mechanism includes a fixed frame, a cutter, a press frame and a press plate, and the press plate is fixedly connected to the bottom of the frame. This patent realizes the synchronous work of sealing and bonding and cutting of scraps, which not only solves the problem of uneven cutting that may be caused by traditional manual cutting of scraps, but also improves the efficiency of sealing and bonding of inflatable beds.

[0004] Although the above-mentioned prior art solves the problem caused by manual cutting of the excess edge part, the cutter is arranged on the pressing machine. The cutting of the excess edge part of the inflatable bed after pressing by the cutter is based on the power when the pressing machine presses the upper and lower layers with the middle layer. However, in order to make the pressing size meet the requirements, the pressing width size during pressing needs to be slightly larger than or basically equal to the required width size, and then the cutting of the excess edge part can be carried out close to the pressing edge. When considering the actual pressing situation, it is difficult to achieve absolute neatness for the laying of the upper and lower layers and the middle layer. Therefore, the width of the pressing plate of the pressing machine needs to be larger than the width of the pressing frame. Therefore, in the above-mentioned patent, when the cutter cuts the excess edge part of the inflatable bed, it cannot ensure that the cutting position is close to the pressing edge. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated device for pressing and trimming a PVC inflatable bed and a method for manufacturing a PVC inflatable bed, so as to solve the technical problems in the related art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A PVC inflatable bed pressing and trimming integrated device comprises a frame, wherein a pressing part and a paving part are provided on the frame, wherein the paving part comprises a lower pressing plate and a pressing frame which are arranged to move in and out of the pressing part, and the pressing frame is arranged on the lower pressing plate in a vertically movable manner through a supporting frame. During pressing, the PVC inflatable bed is stretched on the pressing frame to perform a pressing process between the lower pressing plate and an upper pressing plate of the pressing part, and further comprises a pressing edge assembly, which comprises two outer pressing plates corresponding to each edge of the pressing frame on the supporting frame and an inner supporting plate, wherein the two outer pressing plates are swingably arranged on the supporting frame, and the outer pressing plates cooperate with the inner supporting plates to clamp the edge portion of the PVC inflatable bed, and the inner supporting plate is slidably arranged on the supporting frame, and in the sliding direction, a first elastic member is provided between the inner supporting plate and the supporting frame, and based on the elastic force of the first elastic member, the inner supporting plate has a tendency to abut against the outer wall of the pressing frame, and the outer pressing plate does not contact the outer wall of the pressing frame.

[0008] The above also includes a trimming assembly, which is arranged on the outer side wall of the press frame. When it is necessary to cut off the excess part of the edge of the PVC inflatable bed, the trimming assembly moves along the track of the press frame to cut off the excess part of the edge of the PVC inflatable bed.

[0009] As mentioned above, the trimming assembly includes a double-layer slideway provided on the outer side wall of the press frame, a knife seat is slidably provided in each slideway, the knife seat is driven by a first driving member to move along the slideway, and a trimming knife is installed on each knife seat.

[0010] As mentioned above, each layer of the slideway is slidably provided with a number of knife seats equal to the number of sides of the press frame, and two adjacent knife seats located in the same layer of the slideway are connected by a transmission rope.

[0011] As described above, the pressing frame is fixed to the inner side of the supporting frame, and the supporting frame is slidably arranged on the lower pressing plate along the pressing direction, and the supporting frame is driven by the second driving member to approach the lower pressing plate, and there is a cavity between each inner supporting plate and the outer side wall of the pressing frame; when the pressing operation is performed, each inner supporting plate squeezes the two knife seats at the corresponding positions close to each other based on the elastic force of the connected first elastic member, so as to drive the two trimming knives to retract into the cavity, and each transmission rope undergoes elastic deformation; when it is necessary to cut the excess part of the edge of the PVC inflatable bed, each inner supporting plate removes the squeezing effect on the corresponding two knife seats based on the driving action of the second driving member, and under the action of the rebound force of each transmission rope, each trimming knife extends out of the cavity and cuts the excess part of the edge of the PVC inflatable bed under the drive of the first driving member.

[0012] As mentioned above, each trimming knife is closely attached to the outer side wall of the press frame and extends out of the cavity.

[0013] As mentioned above, each of the inner support plates is arranged with two racks, and each outer pressure plate swing position is arranged with a gear; when the inner support plates remove the extrusion action of the corresponding two knife seats based on the driving action of the second driving member, each rack is meshed with the gear at the corresponding position, and the outer pressure plate is deflected toward the direction close to the inner support plate based on the force of the rack on the meshing gear, and the outer pressure plate and the inner support plate clamp the excess part of the edge of the PVC inflatable bed again to form a pulling effect, and the excess part of the edge of the PVC inflatable bed undergoes elastic deformation.

[0014] As mentioned above, the second driving member includes a driving cylinder fixed on the frame with the same number of corners as the pressing frame, a sleeve is installed on the lower pressing plate at a position corresponding to each driving cylinder, a transmission shaft is slidably installed in each sleeve along the pressing direction, the driving cylinder and the transmission shaft at the corresponding position are connected in a detachable manner, an extrusion member is provided between each sleeve and the corresponding transmission shaft, the transmission shaft is rotatably connected to the supporting frame, a pushing block is installed on the transmission shaft, and a pressure plate is installed on each inner support plate; during the movement stroke of the transmission shaft along the pressing direction, the transmission shaft rotates based on the extrusion action of the extrusion member, and based on the rotation action of the transmission shaft, the pushing block pushes the pressure plate to move to drive the inner support plate to remove the extrusion action of the tool holder.

[0015] As mentioned above, the extrusion member includes an extrusion protrusion arranged in the sleeve and an extrusion groove opened on the transmission shaft, the extrusion protrusion is slidably arranged in the extrusion groove, and the extrusion groove is a columnar spiral structure.

[0016] The present invention also relates to a method for manufacturing a PVC inflatable bed, wherein the method comprises the following steps when the PVC inflatable bed is manufactured by the above-mentioned integrated device for pressing and trimming the PVC inflatable bed:

[0017] Step 1: Preparation for paving: On the paving part, stretch the middle layer of the PVC inflatable bed on the press frame, lay one of the bottom layers on the lower press plate, and lay the other bottom layer on the press frame. The edge pressing assembly presses the edge of each bottom layer in contact with the middle layer;

[0018] Step 2: Pressing process: the lower pressing plate drives the pressing frame to enter the pressing part, and the upper pressing plate in the pressing part cooperates with the lower pressing plate and the pressing frame to press the two bottom surfaces and the middle surface after paving;

[0019] Step 3: Trimming: The pressed PVC air bed is moved to the paving department, and the staff uses a trimming knife to cut off the excess part of the edge of the PVC inflatable bed.

[0020] The beneficial effect of the present invention is that by arranging two outer pressure plates and one inner support plate at the position corresponding to each edge of the PVC inflatable bed, the parts where the two bottom surfaces are in contact with the middle surface can be clamped, and the inner support plate is pressed against the outer wall of the pressing frame under the elastic force of the first elastic member, while the outer pressure plate and the pressing frame are not in contact and there is a certain distance between them. When the pressing process of the two bottom surfaces and the middle surface is completed and the excess part of the edge needs to be cut off, the staff can hold the trimming knife and cut off the excess part of the edge of the PVC inflatable bed along the gap track between the outer pressure plate and the pressing frame. In this way, it can be ensured to a large extent that the cut excess part can be close to the pressing edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the structure of a PVC inflatable bed provided in an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of a PVC inflatable bed pressing and trimming integrated device provided in an embodiment of the present invention;

[0024] Figure 3 It is an overall exploded view of a PVC inflatable bed pressing and trimming integrated device provided in an embodiment of the present invention;

[0025] Figure 4 for Figure 3 A is an enlarged structural diagram;

[0026] Figure 5 for Figure 3 The enlarged structural diagram at B in FIG.

[0027] Figure 6 for Figure 3 The enlarged structural diagram at C in FIG.

[0028] Figure 7 It is a schematic cross-sectional structure diagram of an outer pressing plate and an inner supporting plate of a PVC inflatable bed edge pressing and trimming integrated device provided in an embodiment of the present invention when the excess portion of the edge of the PVC inflatable bed is not clamped;

[0029] Figure 8 It is a schematic cross-sectional structure diagram of an outer pressing plate and an inner supporting plate of a PVC inflatable bed edge pressing and trimming integrated device provided in an embodiment of the present invention when clamping the excess portion of the edge of the PVC inflatable bed;

[0030] Fig. 9 It is a schematic diagram of an exploded structure of an extrusion piece of a PVC inflatable bed pressing and trimming integrated device provided in an embodiment of the present invention from a first-person perspective;

[0031] Fig.10 It is a schematic diagram of the exploded structure from a second perspective of an extrusion component of an integrated device for pressing and trimming a PVC inflatable bed provided in an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Frame; 10. Lower pressure plate; 11. Press frame; 12. Driving cylinder; 13. Support frame; 2. Edge pressing assembly; 20. Outer pressure plate; 21. Inner support plate; 22. Cavity; 23. Sleeve; 24. Transmission shaft; 25. Push block; 26. Pressure plate; 27. Extrusion convex block; 28. Extrusion groove; 29. ​​Rack; 30. Slide; 31. Knife seat; 32. Trimming knife; 33. Transmission rope; 34. Notch; 35. Gear; 36. Extrusion part; 37. Pressure part; 38. Main connecting rod; 39. Auxiliary connecting rod; 4. Bottom layer; 5. Middle layer; 6. PVC inflatable bed. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be pressed together Figure 1 To Attachment Fig.10 The present invention is further described in detail.

[0035] The embodiment of the present invention provides an integrated device for pressing and trimming a PVC inflatable bed, comprising a frame 1, wherein the frame 1 is provided with a pressing part and a paving part, wherein the paving part comprises a lower pressing plate 10 and a pressing frame 11 which are arranged to move in and out of the pressing part, wherein the pressing frame 11 is arranged on the lower pressing plate 10 in a vertically movable manner through a supporting frame 13, wherein during pressing, the PVC inflatable bed 6 is stretched on the pressing frame 11 to perform a pressing process between the lower pressing plate 10 and the upper pressing plate of the pressing part, and further comprises a pressing edge assembly 2, which comprises a pressing frame 13 and a pressing frame 11 which is arranged on the supporting frame 13 and is movable in a vertical direction. There are two outer pressing plates 20 and one inner supporting plate 21 corresponding to each side, and the two outer pressing plates 20 are swingably arranged on the support frame 13. The outer pressing plates 20 and the inner supporting plates 21 cooperate to clamp the edge of the PVC inflatable bed 6, and the inner supporting plate 21 is slidably arranged on the support frame 13. In the sliding direction, a first elastic member is provided between the inner supporting plate 21 and the support frame 13. Based on the elastic force of the first elastic member, the inner supporting plate 21 has a tendency to abut against the outer side wall of the pressing frame 11, and the outer pressing plates 20 do not contact the outer side wall of the pressing frame 11.

[0036] Specifically, the PVC inflatable bed 6 is generally made by a pressing machine, that is, the two bottom surfaces 4 of the PVC inflatable bed 6 and the middle surface 5 located between the two bottom surfaces 4 are press-melted by applying pressure and high temperature (the pressing direction is vertical), so that an air cavity is formed between the two bottom surfaces 4 and the middle surface 5, and then the gas is filled into the cavity to form the PVC inflatable bed 6. Before pressing, the two bottom surfaces 4 and the middle surface 5 need to be arranged in the paving part, that is, the middle surface 5 is arranged on the inner side wall of the press frame 11 that matches its unfolded shape, and excess amount is left on the upper and lower bottom surfaces of the press frame 11, and then one of the bottom surfaces 4 is laid on On the lower pressing plate 10, the pressing frame 11 is separated from the lower pressing plate 10 at this time. After one of the bottom surfaces 4 is laid on the lower pressing plate 10, the pressing frame 11 moves down again and abuts against the lower pressing plate 10. At this time, the excess part of the middle layer 5 on the lower bottom surface of the pressing frame 11 will contact the bottom surface 4 on the lower pressing plate 10, and then the other bottom surface 4 is unfolded and laid on the upper bottom surface of the pressing frame 11, so that the middle layer 5 is also in contact with the other bottom surface 4, and then the lower pressing plate 10 can be moved from the frame 1 to the pressing part, and the upper pressing plate in the pressing part approaches the lower pressing plate 10, and the two bottom surfaces 4 and the middle layer 5 are pressed together. The specific structure of the pressing part is the prior art and is not shown in the figure.

[0037] After the pressing operation of the PVC inflatable bed 6 is completed, the excess part of its edge needs to be cut. In the prior art mentioned in the background technology, although the problem caused by manual cutting of the excess part of the edge is solved, the cutter is arranged on the pressing machine. The cutting of the excess part of the edge of the PVC inflatable bed 6 after pressing by the cutter is based on the power when the pressing machine presses the upper and lower layers with the middle layer 5. However, in order to make the pressing size meet the requirements, the pressing width size during pressing needs to be slightly larger than or basically equal to the required width size. After that, the cutting of the excess part of the edge of the PVC inflatable bed 6 can be carried out close to the pressing edge. When considering the actual pressing situation, it is difficult to achieve absolute neatness for the laying of the upper and lower layers and the middle layer 5. Therefore, the width of the pressing plate of the pressing machine needs to be larger than the width of the pressing frame 11. Therefore, when the cutter cuts the excess part of the edge of the PVC inflatable bed 6, it cannot ensure that the cutting position is close to the pressing edge.

[0038] Based on the above technical problems, in this embodiment, two outer pressure plates 20 and one inner support plate 21 corresponding to each side of the pressing frame 11 are provided on the supporting frame 13, that is, the two outer pressure plates 20 correspond to the edge portions of the two bottom surfaces 4 contacting the middle surface 5, respectively, and each outer pressure plate 20 cooperates with the inner support plate 21 to clamp the edge portions of the bottom surface 4 contacting the middle surface 5 at the corresponding position, wherein the inner support plate 21 can be pressed against the outer side wall of the pressing frame 11 under the elastic force of the first elastic member, while the corresponding outer pressure plate 20 does not contact the outer side wall of the pressing frame 11, then on the outer side wall of the pressing frame 11 A gap will be formed between the outer pressure plate 20, and the contact part between the bottom surface 4 and the middle surface 5 and the part corresponding to the bottom surface of the press frame 11 is to be pressed together. Then the contact part between the bottom surface 4 and the middle surface 5 in the gap between the outer wall of the press frame 11 and the outer pressure plate 20 is an excess part. In this way, after the pressing operation is completed, the lower pressure plate 10 moves from the pressing part to the paving part, and the press frame 11 moves up and away from the lower pressure plate 10. At this time, the staff can use a trimming knife to cut off the excess part of the contact part between the bottom surface 4 and the middle surface 5 in the gap between the outer wall of the press frame 11 and the outer pressure plate 20.

[0039] The beneficial effect of this embodiment is that by arranging two outer pressure plates 20 and an inner support plate 21 at the position corresponding to each edge of the PVC inflatable bed 6, the contact parts of the two bottom surfaces 4 and the middle surface 5 can be clamped, and the inner support plate 21 is pressed against the outer wall of the pressing frame 11 under the elastic force of the first elastic member, while the outer pressure plate 20 and the pressing frame 11 are not in contact and there is a certain distance between them. Then, when the pressing process of the two bottom surfaces 4 and the middle surface 5 is completed and the excess part of the edge needs to be cut, the staff can hold the trimming knife and cut off the excess part of the edge of the PVC inflatable bed 6 along the gap track between the outer pressure plate 20 and the pressing frame 11. In this way, it can be ensured to a large extent that the cut excess part can be close to the pressing edge.

[0040] In the above-mentioned embodiment, after the pressing operation is completed, after the lower pressing plate 10 moves from the pressing part to the paving part, the staff can use a handheld trimming knife to remove the excess part of the edge of the PVC inflatable bed 6. However, the pressing process is carried out under high pressure and high temperature, so manual cutting will have the risk of scalding, and manual cutting is likely to have an adverse effect on production efficiency. Therefore, in a further embodiment, a trimming component is also included, which is arranged on the outer wall of the pressing frame 11. When it is necessary to cut the excess part of the edge of the PVC inflatable bed 6, the trimming component moves along the trajectory of the pressing frame 11 to cut off the excess part of the edge of the PVC inflatable bed 6; the trimming component includes a double-layer slide 30 opened on the outer wall of the pressing frame 11, and a knife seat 31 is slidably provided in each layer of the slide 30. The knife seat 31 is driven by the first driving member to move along the slide 30, and a trimming knife 32 is installed on each knife seat 31.

[0041] Specifically, the sliding trajectory of the knife seat 31 in the corresponding slide 30 is consistent with the outer shape trajectory of the press frame 11, that is, it moves along the edge of the PVC inflatable bed 6 for one circle, and the trimming knife 32 cuts off the excess part, which can avoid burns to the staff and improve production efficiency. The first driving component is arranged in the knife seat 31, and the power output end of the motor is equipped with a walking wheel. The walking wheel is in rolling contact with the inner wall of the slide 30, so that the knife seat 31 can be driven to move along the corresponding slide 30.

[0042] To further improve the trimming efficiency, in a preferred embodiment, each layer of the slide 30 is slidably provided with a knife seat 31 with the same number of sides as the pressing frame 11, and the two adjacent knife seats 31 located in the same layer of the slide 30 are connected by a transmission rope 33. In this way, only the first driving member needs to be arranged on the corresponding two of the knife seats 31 in the double-layer slide 30, so that the excess parts around the PVC inflatable bed 6 can be quickly cut and removed.

[0043] Furthermore, the pressing frame 11 is fixed to the inner side of the support frame 13, and the support frame 13 is slidably arranged on the lower pressing plate 10 along the pressing direction, and the support frame 13 is driven by the second driving member to approach the lower pressing plate 10, and there is a cavity 22 between each inner support plate 21 and the outer wall of the pressing frame 11; when the pressing operation is performed, each inner support plate 21 squeezes the two knife seats 31 at the corresponding positions close to each other based on the elastic force of the connected first elastic member, so as to drive the two trimming knives 32 to retract into the cavity 22, and each transmission rope 33 undergoes elastic deformation; when it is necessary to cut the excess part of the edge of the PVC inflatable bed 6, each inner support plate 21 removes the squeezing effect on the corresponding two knife seats 31 based on the driving action of the second driving member, and under the action of the rebound force of each transmission rope 33, each trimming knife 32 extends out of the cavity 22 and cuts the excess part of the edge of the PVC inflatable bed 6 under the drive of the first driving member.

[0044] Specifically, in the aforementioned embodiment, the trimming knife 32 is not hidden when not in use, which may cause accidental injury to the staff and damage to the materials used to make the PVC inflatable bed 6. Therefore, in the present embodiment, a cavity 22 is provided between each inner support plate 21 and the outer wall of the press frame 11, and the double-layer slide 30 is hidden in the cavity 22. A V-shaped notch 34 is provided in the middle of the double-layer slide 30 corresponding to each side of the press frame 11, that is, the two corresponding knife seats 31 in the double-layer slide 30 can be close to each other when an external force is applied to this position. , then this effect can be utilized, that is, the two corresponding knife seats 31 in the double-layer slide 30 can approach each other when they are in the notch 34 of the V-shaped structure under the action of external force, and respectively drive the trimming knives 32 installed respectively to retract into the cavity 22, thereby hiding the trimming knives 32, and when the knife seats 31 are in other positions, the trimming knives 32 will be driven to extend out of the cavity 22 to cut the excess part of the edge of the PVC inflatable bed 6. In this way, in this embodiment, a wedge-shaped extrusion portion 36 is provided on each inner support plate 21, and correspondingly on each knife seat 31 A wedge-shaped pressure-receiving portion 37 is provided. When the inner support plate 21 contacts the outer wall of the pressure frame 11 based on the elastic force of the first elastic member, the extrusion effect generated by the wedge-shaped cooperation between the extrusion portion 36 and the pressure-receiving portion 37 can make the two corresponding tool seats 31 in the double-layer slideway 30 approach each other, wherein the transmission rope 33 connecting the two adjacent tool seats 31 will undergo a certain elastic deformation. However, in the process of the first driving member driving the tool seats 31 connected thereto to move, since each tool seat 31 is arranged in a sliding manner in the corresponding slideway 30, the tool seats 31 are The insufficient friction force between 31 and the slide 30 can drive the transmission rope 33 to undergo elastic deformation, that is, when the excess part of the edge of the PVC inflatable bed 6 needs to be cut, each inner support plate 21 can be driven away from the outer wall of the press frame 11 by the second driving member, so that the extrusion part 36 and the pressed part 37 are separated. Then, under the action of the rebound force of each transmission rope 33, the corresponding two knife seats 31 in the double-layer slide 30 will move away from each other, so that the trimming knife 32 extends out of the cavity 22 between the corresponding inner support plate 21 and the outer wall of the press frame 11.

[0045] The second driving member can drive the support frame 13 to approach or move away from the lower pressing plate 10, and can also drive each inner support plate 21 away from the side wall of the pressing frame 11. Therefore, in an optional embodiment, the second driving member includes a driving cylinder 12 fixed to the frame 1 and having the same number of corners as the pressing frame 11, and a sleeve 23 is installed at a position corresponding to each driving cylinder 12 on the lower pressing plate 10, and a transmission shaft 24 is slidably installed in each sleeve 23 along the pressing direction, and a transmission shaft 24 at a corresponding position is connected between the driving cylinder 12 and the corresponding position. The drive shaft 24 is connected in a detachable manner, and an extrusion piece is provided between each sleeve 23 and the corresponding drive shaft 24. The drive shaft 24 is rotatably connected to the support frame 13. A pushing block 25 is installed on the drive shaft 24, and a pressure plate 26 is installed on each inner support plate 21. During the movement of the drive shaft 24 along the pressing direction, the drive shaft 24 rotates based on the extrusion action of the extrusion piece, and based on the rotation action of the drive shaft 24, the pushing block 25 pushes the pressure plate 26 to move to drive the inner support plate 21 to remove the extrusion action of the tool holder 31.

[0046] Specifically, during the extension of the driving cylinder 12, the corresponding transmission shaft 24 can be pushed to move vertically upward to push the support frame 13 away from the lower pressing plate 10. When the lower pressing plate 10 needs to enter the pressing portion, the driving cylinder 12 cannot follow it, so the driving cylinder 12 and the corresponding transmission shaft 24 need to be disengaged. Therefore, in the sliding direction of the transmission shaft 24, a second elastic member is provided between it and the sleeve 23, that is, based on the elastic force of the second elastic member, the transmission shaft 24 always drives the support frame 13 close to the lower pressing plate 10, so that during the shortening process of the driving cylinder 12, when the power output end of the driving cylinder 12 is separated from the lower end of the transmission shaft 24, the support frame 13 can also approach the lower pressure plate 10 under the elastic force of the second elastic member, that is, the detachable connection between the driving cylinder 12 and the corresponding transmission shaft 24, and then the transmission shaft 24 needs to be able to rotate so that the pushing block 25 pushes the pressure plate 26 to drive the inner support plate 21 connected thereto away from the outer wall of the pressing frame 11, so that the pressing frame 11 should have three positions in the vertical direction:

[0047] In the first position, when two bottom surfaces 4 and a middle surface 5 need to be laid, the press frame 11 is at a position away from the lower press plate 10;

[0048] In the second position, when a bottom surface 4 is laid on the lower pressing plate 10 and the middle surface 5 is laid on the pressing frame 11, the pressing frame 11 is driven to abut against the lower pressing plate 10, and then another bottom surface 4 is placed on the pressing frame 11;

[0049] At the third position, the pressing frame 11 is driven from the second position back to the first position and then continues to move vertically for a distance, and then the trimming knife 32 is driven to cut the excess part of the edge of the PVC inflatable mattress 6;

[0050] During the travel of the pressing frame 11 from the first position to the third position, the transmission shaft 24 rotates, and the extrusion piece between the transmission shaft 24 and the corresponding sleeve 23 starts to work, so that the transmission shaft 24 can rotate relative to the corresponding sleeve 23, that is, the extrusion piece includes an extrusion protrusion 27 arranged in the sleeve 23 and an extrusion groove 28 provided on the transmission shaft 24, the extrusion protrusion 27 is slidably arranged in the extrusion groove 28, and the extrusion groove 28 is a columnar spiral structure, in which each shaft corresponds to an inner support plate 21, so that the inner support plate 21 corresponding to each side of the pressing frame 11 can release the extrusion restriction between the corresponding two tool seats 31 in the double-layer slide 30 during the travel of the pressing frame 11 from the first position to the third position.

[0051] Furthermore, each trimming knife 32 is closely attached to the outer wall of the pressing frame 11 and extends out of the cavity 22; specifically, the trimming knife 32 is closely attached to the outer wall of the pressing frame 11, and during the movement, the blade can also be closely attached to the junction of the pressed part and the excess part, thereby ensuring the cutting is in place.

[0052] Furthermore, two racks 29 are arranged on each of the inner support plates 21, and a gear 35 is arranged at the swing position of each outer pressure plate 20; when the inner support plates 21 remove the extrusion action of the corresponding two knife seats 31 based on the driving action of the second driving member, each rack 29 is meshed with the gear 35 at the corresponding position, and the outer pressure plate 20 is deflected toward the direction close to the inner support plate 21 based on the force of the rack 29 on the meshing gear 35, and the outer pressure plate 20 and the inner support plate 21 clamp the excess part of the edge of the PVC inflatable bed 6 again, forming a pulling effect, and the excess part of the edge of the PVC inflatable bed 6 undergoes elastic deformation.

[0053] Specifically, when the inner support plate 21 is driven away from the outer wall of the pressing frame 11, the rack 29 on the inner support plate 21 will gradually mesh with the gear 35 at the corresponding position, and after the two are meshed, the rack 29 can continue to move, and then the outer pressure plate 20 connected to the gear 35 will deflect, and it will deflect in the direction close to the inner support plate 21, so that the distance between the outer pressure plate 20 and the inner support plate 21 is further reduced, and the clamping force for the excess part of the edge of the PVC inflatable bed 6 is increased again. In this process, the inner support plate 21 continues to move away from the outer wall of the pressing frame 11, so the inner support plate 21 cooperates with the outer pressure plate 20 to form a pulling effect on the excess part of the edge of the PVC inflatable bed 6, and the excess part of the edge of the PVC inflatable bed 6 can be further tightened, which is more conducive to cutting by the trimming knife 32.

[0054] In order to ensure that the distance moved by each inner support plate 21 in the process of moving away from the outer wall of the pressing frame 11 is basically the same, in this embodiment, two inner support plates 21 at adjacent positions are connected by a synchronous connection structure. In the extrusion stroke of each inner support plate 21 to remove the tool holder 31, the synchronous connection structure ensures that the moving distance of the two adjacent inner support plates 21 remains consistent, that is, a main connecting rod 38 is rotatably provided at the end of each inner support plate 21, and two adjacent main connecting rods 38 are connected by a secondary connecting rod 39, and the two ends of the two main connecting rods 38 connected to the secondary connecting rod 39 are meshed by teeth, so that in one of the inner support plates 21, a main connecting rod 38 is provided at the end of each inner support plate 21, and the two adjacent main connecting rods 38 are connected by a secondary connecting rod 39. When the inner support plate 21 moves, it will inevitably drive the main connecting rod 38 connected to it to move. When the two adjacent inner support plates 21 are away from the outer wall of the pressure frame 11, the two are also away from each other. Then, deflection will inevitably occur between the two main connecting rods 38, and the tooth engagement can achieve mutual restriction to prevent one party from deflecting too much. Therefore, it can be ensured that the distance moved by each inner support plate 21 in the process of moving away from the outer wall of the pressure frame 11 is basically the same. In this way, it can be avoided that when the outer pressure plate 20 and the inner support plate 21 clamp the excess part of the edge of the PVC inflatable bed 6 and pull it, due to the inconsistent moving distance, some parts are pulled with a large force and torn.

[0055] The embodiment of the present invention further provides a method for manufacturing a PVC inflatable bed, wherein the method comprises the following steps when the PVC inflatable bed is manufactured by the above-mentioned PVC inflatable bed pressing and trimming integrated device:

[0056] Step 1: Preparation for paving: On the paving part, stretch the middle layer of the PVC inflatable bed 6 on the press frame 11, lay one of the bottom layers on the lower press plate 10, and lay the other bottom layer on the press frame 11. The edge pressing assembly 2 presses the edge of each bottom layer in contact with the middle layer;

[0057] Step 2: Lamination process: the lower pressing plate 10 drives the pressing frame to enter the lamination part, and the upper pressing plate in the lamination part cooperates with the lower pressing plate 10 and the pressing frame 11 to perform lamination process on the two bottom surfaces and the middle surface after paving;

[0058] Step 3: trimming. The pressed PVC inflatable bed 6 is moved to the paving department, and the staff uses a trimming knife to cut off the excess part of the edge of the PVC inflatable bed 6.

[0059] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the protection of the present invention.

Claims

1. A PVC inflatable bed pressing and trimming integrated device, comprising a frame, a pressing part and a paving part are arranged on the frame, the paving part comprises a lower pressing plate and a pressing frame arranged to move in and out of the pressing part, the pressing frame is arranged on the lower pressing plate in a vertically movable manner through a supporting frame, during pressing, the PVC inflatable bed is stretched on the pressing frame to perform pressing between the lower pressing plate and the upper pressing plate of the pressing part, characterized in that: Also includes: The edge pressing assembly includes two outer pressure plates corresponding to each edge of the pressure frame and an inner support plate on the support frame. The two outer pressure plates are swingably arranged on the support frame. The outer pressure plates and the inner support plates cooperate to clamp the edge portion of the PVC inflatable bed. The inner support plate is slidably arranged on the support frame, and in the sliding direction, a first elastic member is provided between the inner support plate and the support frame. Based on the elastic force of the first elastic member, the inner support plate tends to abut against the outer wall of the pressure frame, and the outer pressure plates do not contact the outer wall of the pressure frame.

2. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 1, characterized in that: It also includes a trimming assembly, which is arranged on the outer side wall of the pressing frame. When it is necessary to cut off the excess part of the edge of the PVC inflatable bed, the trimming assembly moves along the track of the pressing frame to cut off the excess part of the edge of the PVC inflatable bed.

3. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 2, characterized in that: The trimming assembly includes a double-layer slideway provided on the outer side wall of the press frame, a knife seat is slidably arranged in each slideway, the knife seat is driven by a first driving member to move along the slideway, and a trimming knife is installed on each knife seat.

4. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 3, characterized in that: The slideway of each layer is provided with knife seats with the same number as the sides of the pressing frame, and two adjacent knife seats located in the slideway of the same layer are connected by a transmission rope.

5. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 4, characterized in that: The press frame is fixed to the inner side of the support frame, and the support frame is arranged to slide on the lower pressing plate along the pressing direction, and the support frame is driven by the second driving member to approach the lower pressing plate, and there is a cavity between each inner support plate and the outer side wall of the press frame; When the pressing operation is performed, each inner support plate presses the two knife seats at the corresponding positions closer to each other based on the elastic force of the connected first elastic member, so as to drive the two trimming knives to retract into the cavity, and each transmission rope undergoes elastic deformation; When it is necessary to cut the excess part of the edge of the PVC inflatable bed, each inner support plate removes the squeezing effect on the corresponding two knife seats based on the driving action of the second driving member. Under the action of the rebound force of each transmission rope, each trimming knife extends out of the cavity and cuts the excess part of the edge of the PVC inflatable bed under the drive of the first driving member.

6. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 5, characterized in that: Each trimming knife is closely attached to the outer side wall of the pressing frame and extends out of the cavity.

7. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 5, characterized in that: Two racks are arranged on each inner support plate, and a gear is arranged on each swing position of the outer pressure plate; During the process in which the inner support plates remove the extrusion effect of the two corresponding tool seats based on the driving action of the second driving member, each rack is meshed with the gear at the corresponding position, and the outer pressure plate is deflected toward the inner support plate based on the force of the rack on the meshing gear. The outer pressure plate and the inner support plate clamp the excess part of the edge of the PVC inflatable bed again and form a pulling effect, and the excess part of the edge of the PVC inflatable bed undergoes elastic deformation.

8. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 5, characterized in that: The second driving member includes a driving cylinder fixed on the frame and having the same number of corners as the pressing frame, a sleeve is installed on the lower pressing plate at a position corresponding to each driving cylinder, a transmission shaft is slidably installed in each sleeve along the pressing direction, the driving cylinder and the transmission shaft at the corresponding position are connected in a detachable manner, an extrusion member is provided between each sleeve and the corresponding transmission shaft, the transmission shaft is rotatably connected to the support frame, a push block is installed on the transmission shaft, and a pressure plate is installed on each inner support plate; During the movement of the transmission shaft along the pressing direction, the transmission shaft rotates based on the extrusion effect of the extrusion piece, and based on the rotation effect of the transmission shaft, the pushing block pushes the pressure plate to move to drive the inner support plate to remove the extrusion effect on the tool holder.

9. The integrated device for pressing and trimming the edge of a PVC inflatable bed according to claim 8, characterized in that: The extrusion piece includes an extrusion protrusion arranged in the sleeve and an extrusion groove opened on the transmission shaft, the extrusion protrusion is slidably arranged in the extrusion groove, and the extrusion groove is a columnar spiral structure.

10. A method for manufacturing a PVC inflatable bed, based on the PVC inflatable bed pressing and trimming integrated device according to any one of claims 1 to 9, characterized in that: The PVC inflatable bed manufacturing method includes the following steps: Preparation for paving: On the paving part, stretch the middle layer of the PVC inflatable bed on the press frame, lay one of the bottom layers on the lower press plate, and lay the other bottom layer on the press frame. The edge pressing assembly presses the edge of each bottom layer in contact with the middle layer; During the pressing process, the lower pressing plate drives the pressing frame to enter the pressing part. The upper pressing plate in the pressing part cooperates with the lower pressing plate and the pressing frame to press the two bottom surfaces and the middle surface after paving. After trimming, the pressed PVC air bed is moved to the paving department, and the staff uses a trimming knife to cut off the excess part of the edge of the PVC inflatable bed.

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