CN220995423U - PVC bellows roll forming equipment - Google Patents

Abstract

The utility model provides PVC corrugated pipe rolling forming equipment which comprises a supporting table, wherein a hot air box is arranged on the top surface of the supporting table, two hot air blowers are connected to one side of the hot air box, the outlet ends of the hot air blowers are in through connection with the inside of the hot air box, two preheating boxes are in through connection with one side, far away from the hot air blowers, of the hot air box, a circulating rolling mechanism is connected to the top surface of the supporting table, and two groups of circulating rolling mechanisms are arranged in a mirror image mode. According to the utility model, the second driving belt is driven by the second motor, so that the shaping assembly is preheated in the preheating box, then is further heated in the hot air box, and is cleaned by the side brush assembly, after the PVC pipe is led into the shaping assembly, the PVC pipe can be simultaneously rolled and shaped in the shaping channel formed by the two groups of circulating rolling mechanisms to form a corrugated pipe structure, and then the shaped corrugated pipe is led out of the hot air box for cooling and shaping.

Description

PVC bellows roll forming equipment

Technical Field

The utility model relates to the technical field of PVC pipe processing, in particular to rolling forming equipment for a PVC corrugated pipe.

Background

PVC corrugated pipe is a pipe made of polyvinyl chloride material and having a corrugated structure. It is commonly used in drainage, sewage drainage, wire and cable protection, and other industrial and construction applications. PVC corrugated pipe has good chemical resistance, can resist the erosion of various acids, alkalis and solvents, and is more reliable to use in corrosive environments.

Most of the PVC corrugated pipes produced at present are formed by adopting a rolling forming mode, the adopted rolling forming equipment is used for heating the PVC pipe by the steps requiring the preamble processing, then the heated PVC pipe is led into the rolling equipment, the outer wall of the PVC pipe is formed by rolling by utilizing two groups of circulating rolling structures, and the mode of directly forming the heated PVC pipe by rolling and shaping is simple, but the existing rolling forming equipment also has the following problems:

When the heated PVC pipe enters the inside of the roll forming equipment, the PVC pipe is rapidly roll formed and cooled and shaped, so that the condition that the PVC pipe is cooled and shaped when the PVC pipe is not completely formed yet is difficult to ensure the roll forming precision and stability of the PVC pipe.

In summary, there is a need for a stable and precise roll forming apparatus for PVC bellows.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides a PVC corrugated pipe roll forming device, which solves the problems in the background art.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

The utility model provides a PVC bellows roll forming equipment, includes the brace table, the brace table top surface is provided with hot air case, hot air case one side is connected with two air heaters, the hot air case exit end is connected with hot air case inside link-up, hot air case is kept away from hot air case one side link-up and is connected with two preheating cases, the brace table top surface is connected with circulation rolling mechanism, circulation rolling mechanism mirror image is provided with two sets of, circulation rolling mechanism is annular structure, circulation rolling mechanism one side sets up in hot air case inside, circulation rolling mechanism annular side runs through in preheating case inside, the laminating of two sets of adjacent sides of circulation rolling mechanism is formed with the shaping passageway, hot air case lateral wall runs through and is provided with the side brush subassembly, hot air case is close to hot air case one side and has seted up the mouth of pipe, mouth of pipe and shaping passageway are located same horizontal center line;

The circulating rolling mechanism comprises a driving wheel, a shaping assembly, a second driving belt, a driven wheel, a second motor and a third rotating shaft, wherein the second motor is arranged on the bottom surface of the supporting table, the rotating top end of the second motor penetrates through the top surface of the supporting table and is connected with the driving wheel, the third rotating shaft is rotationally connected inside the supporting table, the top end of the third rotating shaft is connected with the driven wheel, the second driving belt is sleeved on the outer walls of the driving wheel and the driven wheel, and the second driving belt is connected with a plurality of groups of shaping assemblies.

Further, the shaping assembly comprises a forming die, fixing plates, fixing columns and heat conducting components, the fixing columns are embedded and fixed inside the second transmission belt, the fixing plates are connected to the two ends of the fixing columns in a rotating mode, the forming die is fixed between the two fixing plates, the corrugated grooves are formed in one side of the forming die, and the heat conducting components penetrate through the forming die.

Further, the heat conduction part includes gear, second pivot, flabellum and fan board, the second pivot rotates to be connected inside forming die, second pivot top is fixed with the gear, second pivot outer wall is fixed with flabellum and fan board, forming die is inside to be seted up the inner chamber, flabellum and fan board set up inside the inner chamber, the ventilation hole has been seted up to link up between inner chamber top and the forming die top surface, the brace table top surface is provided with the second pinion rack, second pinion rack mirror image is provided with two, two second pinion racks set up between two preheating boxes, the second pinion rack is used for meshing drive gear and rotates on forming die.

Further, the inner wall of the preheating box is provided with a first toothed plate, and the first toothed plate is used for meshing the transmission gear to rotate on the forming die.

Further, the forming die bottom surface rotates and is connected with the second gyro wheel, and the brace table top surface is provided with the guide rail, and the guide rail is annular structure, and the second gyro wheel rolls the laminating in the guide rail inside.

Further, the constant head tank has been seted up to forming die bottom surface, and the supporting bench top surface rotates and is connected with first gyro wheel, and first gyro wheel interval distribution is provided with a plurality of and sets up to a roll group, and roll group parallel arrangement has two sets of, and first gyro wheel roll laminating constant head tank is inside.

Further, the side brush assembly comprises a first motor, a first driving belt, a first rotating shaft and a roller brush, wherein the first motor is arranged on the outer wall of the hot air box, the rotating end of the first motor is connected with the first driving belt, the first driving belt is arranged inside the hot air box in a penetrating way, the first rotating shaft is connected to the inner wall of the hot air box in a rotating way, the roller brush is sleeved on the outer wall of the first rotating shaft, and the first driving belt is sleeved at one end of the first rotating shaft;

Two clearance mouths have been seted up to the brace table inside, and the clearance mouth sets up in the cylinder brush bottom, and the brace table bottom surface is fixed with the layer board of L font structure, and it has the recovery box to peg graft between layer board and the brace table bottom surface, and the recovery box sets up in clearance mouth bottom, and recovery box bottom surface is connected with the gim peg, and the slot has been seted up to the layer board bottom surface, and the gim peg is pegged graft inside the slot.

The utility model provides rolling forming equipment for PVC corrugated pipes. Compared with the prior art, the method has the following beneficial effects: through second motor drive second drive belt for shaping subassembly enters into preheating-box inside earlier, then at the inside further heating of hot-blast case, and utilize side brush subassembly to clear up shaping subassembly, after leading-in PVC pipe into shaping subassembly inside, can roll extrusion design simultaneously inside the shaping passageway that two sets of circulation rolling mechanism formed, form the bellows structure, again with fashioned bellows export hot-blast case outside and cool off the design, whole circulation roll extrusion shaping process is simple and convenient, and guaranteed PVC corrugated pipe fashioned stability, improved shaping efficiency.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic diagram of a PVC corrugated pipe roll forming apparatus of the present utility model;

FIG. 2 shows a schematic view of the structure of the two sets of circulating rolling mechanisms of the present utility model disposed on a support table;

FIG. 3 shows a schematic top view of the support table of the present utility model;

FIG. 4 shows a schematic view of the bottom surface structure of the support table of the present utility model;

FIG. 5 is a schematic diagram showing the connection structure of the side brush assembly and the hot air box;

FIG. 6 shows a schematic structural view of the styling assembly of the present utility model;

FIG. 7 is a cross-sectional view showing the internal structure of the styling assembly of the present utility model;

The figure shows: 1. a support table; 11. cleaning the mouth; 12. a guide rail; 13. a first roller; 14. a supporting plate; 141. a slot; 15. a recovery box; 151. a fixing bolt; 2. a hot air box; 21. a pipe inlet; 3. an air heater; 4. a side brush assembly; 41. a first motor; 42. a first belt; 43. a first rotating shaft; 44. a roller brush; 5. a preheating box; 51. a first toothed plate; 6. a circulating rolling mechanism; 61. a driving wheel; 62. shaping the assembly; 621. a forming die; 6211. a corrugated groove; 6212. a positioning groove; 6213. a vent hole; 6214. an inner cavity; 6215. a second roller; 622. a fixing plate; 623. fixing the column; 624. a heat conductive member; 6241. a gear; 6242. a second rotating shaft; 6243. a fan blade; 6244. a fan plate; 63. a second belt; 64. driven wheel; 65. a second motor; 66. a third rotating shaft; 7. and a second toothed plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model are clearly and completely described, and it is obvious that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

In order to solve the technical problems in the background technology, the following rolling forming equipment for the PVC corrugated pipe is provided:

The utility model provides PVC corrugated pipe rolling forming equipment, which is shown in the drawings and is shown in the drawings, and comprises a supporting table 1, wherein the top surface of the supporting table 1 is provided with a hot air box 2, one side of the hot air box 2 is connected with two hot air boxes 3, the outlet ends of the hot air boxes 3 are in through connection with the inside of the hot air boxes 2, one side of the hot air boxes 2, which is far away from the hot air boxes 3, is in through connection with two preheating boxes 5, the top surface of the supporting table 1 is connected with a circulating rolling mechanism 6, two groups of circulating rolling mechanisms 6 are arranged in mirror images, the circulating rolling mechanism 6 is in an annular structure, one side of the circulating rolling mechanism 6 is arranged in the inside of the hot air box 2, the annular side edge of the circulating rolling mechanism 6 penetrates through the inside of the preheating boxes 5, the adjacent side edges of the two groups of the circulating rolling mechanism 6 are jointed to form a forming channel, the side brush assemblies 4 penetrate through the side brush assemblies, one side of the hot air boxes 2, and the side, which is close to the hot air boxes 3, is provided with a water inlet 21, and the forming channel are positioned on the same horizontal central line;

The circulating rolling mechanism 6 comprises a driving wheel 61, a shaping assembly 62, a second transmission belt 63, a driven wheel 64, a second motor 65 and a third rotating shaft 66, wherein the second motor 65 is arranged on the bottom surface of the supporting table 1, the rotating top end of the second motor 65 penetrates through the top surface of the supporting table 1 and is connected with the driving wheel 61, the third rotating shaft 66 is rotatably connected inside the supporting table 1, the top end of the third rotating shaft 66 is connected with the driven wheel 64, the second transmission belt 63 is sleeved on the outer walls of the driving wheel 61 and the driven wheel 64, and the outer wall of the second transmission belt 63 is connected with a plurality of groups of shaping assemblies 62;

The second motor 65 drives the second driving belt 63, so that the shaping assembly 62 firstly enters the preheating box 5 to be preheated, then the inside of the hot air box 2 is further heated, the shaping assembly 62 is cleaned by the side brush assembly 4, after the PVC pipe is led into the shaping assembly 62, the PVC pipe can be simultaneously shaped by rolling in the forming channels formed by the two groups of circulating rolling mechanisms 6 to form a corrugated pipe structure, the formed corrugated pipe is led out to the outside of the hot air box 2 to be cooled and shaped, the whole circulating rolling forming process is simple and convenient, the stability of PVC corrugated pipe forming is ensured, and the forming precision and efficiency are improved.

In this embodiment, the shaping assembly 62 includes a forming mold 621, a fixing plate 622, fixing columns 623 and a heat conducting member 624, the fixing columns 623 are embedded and fixed inside the second driving belt 63, the fixing plates 622 are rotatably connected to both ends of the fixing columns 623, the forming mold 621 is fixed between the two fixing plates 622, a corrugated groove 6211 is formed on one side of the forming mold 621, and the heat conducting member 624 is disposed inside the forming mold 621 in a penetrating manner;

Through set up heat conduction part 624 inside forming die 621, can make forming die 621 get into inside back rapid heating of hot-blast case 2, make corrugated groove 6211 to PVC pipe roll forming, then derive the back with forming die 621 from hot-blast case 2 is inside, can fast cooling, make the PVC bellows that the shaping is good can the cooling design, guaranteed PVC bellows roll forming's stability.

In this embodiment, the heat conducting component 624 includes a gear 6241, a second rotating shaft 6242, fan blades 6243 and a fan plate 6244, the second rotating shaft 6242 is rotatably connected inside the forming mold 621, the top end of the second rotating shaft 6242 is fixed with the gear 6241, the fan blades 6243 and the fan plate 6244 are fixed on the outer wall of the second rotating shaft 6242, an inner cavity 6214 is formed inside the forming mold 621, the fan blades 6243 and the fan plate 6244 are disposed inside the inner cavity 6214, a vent hole 6213 is formed between the top of the inner cavity 6214 and the top surface of the forming mold 621, the top surface of the supporting table 1 is provided with a second toothed plate 7, two second toothed plates 7 are disposed between the two preheating boxes 5 in a mirror image manner, and the second toothed plates 7 are used for engaging the transmission gear 6241 to rotate on the forming mold 621;

When the corrugated pipe is formed and guided out of the hot air box 2, the gear 6241 can be meshed and rotated through the second toothed plate 7, so that the fan blades 6243 and the fan plates 6244 are driven by the inner cavity 6214 of the rotating shaft to rotate, hot air in the inner cavity 6214 is accelerated to flow out of the forming die 621, and accordingly the forming die 621 radiates heat inside and outside simultaneously, and the cooling and shaping efficiency of the corrugated pipe is improved.

In this embodiment, the inner wall of the preheating box 5 is provided with a first toothed plate 51, and the first toothed plate 51 is used to engage with the transmission gear 6241 to rotate on the forming mold 621;

The first toothed plate 51 is arranged inside the preheating box 5, so that when the forming die 621 enters the preheating box 5, the gear 6241 drives the heat conducting component 624 to rotate, hot air inside the preheating box 5 can conduct heat rapidly, and the heating efficiency of the forming die 621 is improved.

Example two

As shown in fig. 3 to 7, on the basis of the above embodiment, the present embodiment further provides the following:

The bottom surface of the forming die 621 is rotatably connected with a second roller 6215, the top surface of the supporting table 1 is provided with a guide rail 12, the guide rail 12 is of an annular structure, and the second roller 6215 is in rolling fit with the inside of the guide rail 12;

The second roller 6215 at the bottom of the forming die 621 rolls in the guide rail 12, so that the stability and the position accuracy of the circulating movement of the forming die 621 are improved, and the forming accuracy of the corrugated pipe is improved.

In this embodiment, the bottom surface of the molding mold 621 is provided with a positioning groove 6212, the top surface of the supporting table 1 is rotatably connected with first rollers 13, the first rollers 13 are distributed at intervals and are arranged into a plurality of rolling groups, the rolling groups are arranged in parallel and are provided with two groups, and the first rollers 13 roll and fit inside the positioning groove 6212;

And then the forming dies 621 are driven to move on the supporting table 1, and the two mutually-attached forming dies 621 are respectively attached and rolled through the first rollers 13 of the two rolling groups, so that the stability of the two forming dies 621 in moving together in a matched manner is improved, and the forming precision of the corrugated pipe is further improved.

In this embodiment, the side brush assembly 4 includes a first motor 41, a first driving belt 42, a first rotating shaft 43 and a roller brush 44, where the first motor 41 is disposed on the outer wall of the hot air box 2, the rotating end of the first motor 41 is connected with the first driving belt 42, the first driving belt 42 is disposed inside the hot air box 2 in a penetrating manner, the first rotating shaft 43 is rotatably connected to the inner wall of the hot air box 2, the roller brush 44 is sleeved on the outer wall of the first rotating shaft 43, and the first driving belt 42 is sleeved on one end of the first rotating shaft 43;

Two cleaning openings 11 are formed in the supporting table 1, the cleaning openings 11 are formed in the bottom of the roller brush 44, the bottom surface of the supporting table 1 is fixedly provided with a supporting plate 14 with an L-shaped structure, a recovery box 15 is inserted between the supporting plate 14 and the bottom surface of the supporting table 1, the recovery box 15 is arranged at the bottom of the cleaning openings 11, the bottom surface of the recovery box 15 is connected with a fixing bolt 151, the bottom surface of the supporting plate 14 is provided with a slot 141, and the fixing bolt 151 is inserted in the slot 141;

After the forming die 621 is led into the hot air box 2 for heating, the first driving belt 42 is driven by an external motor, so that the first rotating shaft 43 drives the roller brush 44 to rotate in the hot air box 2, and the corrugated groove 6211 of the forming die 621 is cleaned in a rotating way, so that the precision of rolling forming of the corrugated pipe is ensured.

The working principle and the using flow of the utility model are as follows:

Firstly, starting the hot air blower 3 according to fig. 1-7 to guide hot air into the hot air box 2, heating the forming mold 621 entering the hot air box 2, guiding part of the hot air into the preheating box 5, and preheating the forming mold 621 in the preheating box 5;

Then, a PVC pipe penetrates through the pipe inlet 21 and is inserted into the hot air box 2, then, the second motors 65 of the two groups of circulating rolling mechanisms 6 are started at the same time, the second motors 65 drive the second transmission belts 63 to circularly rotate at the outer sides of the driving wheels 61 and the driven wheels 64, the forming dies 621 are driven to move in the process of circularly rotating, the second rollers 6215 on the bottom surface of the forming dies 621 roll in the guide rails 12, the forming dies 621 of the two groups of circulating rolling mechanisms 6 close to the pipe inlet 21 rotate around the driving wheels 61 and are close to each other, the PVC pipe is clamped inside the corrugated grooves 6211 of the two forming dies 621 to be formed into the PVC corrugated pipes, and meanwhile, the two forming dies 621 move to enable the first rollers 13 to be in rolling fit with the inner walls of the positioning grooves 6212, so that the two forming dies 621 are kept in closed positioning and continuously clamped and closed on the PVC pipe along with the movement of the second transmission belts 63;

Then the forming die 621 drives the formed PVC corrugated pipe to move out of the hot air box 2, and when the formed PVC corrugated pipe passes through the position of the second toothed plate 7, the second toothed plate 7 is meshed with the gear 6241, the third rotating shaft 66 drives the fan blades 6243 and the fan plates 6244 to rotate in the inner cavity 6214, so that the forming die 621 radiates heat simultaneously inside and outside, the formed PVC corrugated pipe is cooled and shaped until the formed PVC corrugated pipe reaches the circumferential position of the driven wheel 64, and the two forming dies 621 start to be separated;

The separated forming mold 621 is continuously fed into the preheating box 5 to be preheated again, the gear 6241 is driven to rotate by the first toothed plate 51, the fan blades 6243 and the fan plates 6244 are driven to rotate by the third rotating shaft 66 again, hot air is driven to enter the inner cavity 6214 to heat the forming mold 621, then the forming mold 621 is driven to enter the hot air box 2 to be heated further, fine residues adhered to the inside of the corrugated groove 6211 are easily separated from the corrugated groove 6211, so that when the fine residues pass through the position of the roller brush 44, the first motor 41 is started outside, the first rotating shaft 43 is driven to rotate in the hot air box 2 by the first driving belt 42, the roller brush 44 is used for rolling and brushing the residues in the corrugated groove 6211, the inside of the corrugated groove 6211 is kept clean, the PVC pipe is continuously circulated and the brushed residues drop into the recycling box 15 through the cleaning opening 11, and the concentrated cleaning is convenient.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (7)

1. The utility model provides a PVC bellows roll forming equipment which characterized in that: the hot air box comprises a supporting table (1), a hot air box (2) is arranged on the top surface of the supporting table (1), two hot air fans (3) are connected to one side of the hot air box (2), the outlet end of each hot air fan (3) is in through connection with the inside of each hot air box (2), two preheating boxes (5) are in through connection with one side, far away from each hot air fan (3), of each hot air box (2), a circulating rolling mechanism (6) is connected to the top surface of the supporting table (1), two groups of circulating rolling mechanisms (6) are arranged in a mirror image mode, each circulating rolling mechanism (6) is of an annular structure, one side of each circulating rolling mechanism (6) is arranged inside each hot air box (2), annular side edges of each circulating rolling mechanism (6) penetrate through the inside of each preheating box (5), forming channels are formed by laminating adjacent side edges of each two groups of circulating rolling mechanisms (6), a side brush assembly (4) is arranged on the side, an inlet pipe orifice (21) is formed in one side, close to each hot air fan (3), and the inlet pipe orifice (21) is located on the same horizontal center line with each forming channel;

The circulation rolling mechanism (6) comprises a driving wheel (61), a shaping assembly (62), a second transmission belt (63), a driven wheel (64), a second motor (65) and a third rotating shaft (66), wherein the second motor (65) is arranged on the bottom surface of the supporting table (1), the rotating top end of the second motor (65) penetrates through the top surface of the supporting table (1) and is connected with the driving wheel (61), the third rotating shaft (66) is rotationally connected inside the supporting table (1), the top end of the third rotating shaft (66) is connected with the driven wheel (64), the second transmission belt (63) is sleeved on the outer walls of the driving wheel (61) and the driven wheel (64), and the outer walls of the second transmission belt (63) are connected with a plurality of groups of shaping assemblies (62).

2. A PVC bellows roll forming apparatus as claimed in claim 1, wherein: the shaping assembly (62) comprises a shaping die (621), fixing plates (622), fixing columns (623) and heat conducting components (624), wherein the fixing columns (623) are embedded and fixed inside the second transmission belt (63), the fixing plates (622) are rotationally connected to the two ends of the fixing columns (623), the shaping die (621) is fixed between the two fixing plates (622), corrugated grooves (6211) are formed in one side of the shaping die (621), and the heat conducting components (624) penetrate through the inside of the shaping die (621).

3. A PVC bellows roll forming apparatus as claimed in claim 2, wherein: the heat conduction component (624) comprises a gear (6241), a second rotating shaft (6242), fan blades (6243) and a fan plate (6244), the second rotating shaft (6242) is rotationally connected inside a forming die (621), the top end of the second rotating shaft (6242) is fixedly provided with the gear (6241), the fan blades (6243) and the fan plate (6244) are fixedly arranged on the outer wall of the second rotating shaft (6242), an inner cavity (6214) is formed in the forming die (621), the fan blades (6243) and the fan plate (6244) are arranged inside the inner cavity (6214), a vent hole (6213) is formed between the top of the inner cavity (6214) and the top surface of the forming die (621), the top surface of the supporting table (1) is provided with two second toothed plates (7), two second toothed plates (7) are arranged between two preheating boxes (5) in a mirror image mode, and the second toothed plates (7) are used for meshing with the transmission gear (6241) to rotate on the forming die (621).

4. A PVC bellows roll forming apparatus as claimed in claim 3, wherein: the inner wall of the preheating box (5) is provided with a first toothed plate (51), and the first toothed plate (51) is used for meshing with a transmission gear (6241) to rotate on a forming die (621).

5. A PVC bellows roll forming apparatus as claimed in claim 3, wherein: the bottom surface of the forming die (621) is rotationally connected with a second roller (6215), the top surface of the supporting table (1) is provided with a guide rail (12), the guide rail (12) is of an annular structure, and the second roller (6215) is in rolling fit with the inside of the guide rail (12).

6. A PVC bellows roll forming apparatus as claimed in claim 3, wherein: positioning grooves (6212) are formed in the bottom surface of the forming die (621), first rollers (13) are rotatably connected to the top surface of the supporting table (1), a plurality of first rollers (13) are arranged at intervals and are arranged into a rolling group, two groups of rolling groups are arranged in parallel, and the first rollers (13) are in rolling fit with the positioning grooves (6212).

7. A PVC bellows roll forming apparatus as claimed in claim 1, wherein: the side brush assembly (4) comprises a first motor (41), a first driving belt (42), a first rotating shaft (43) and a roller brush (44), wherein the first motor (41) is arranged on the outer wall of the hot air box (2), the rotating end of the first motor (41) is connected with the first driving belt (42), the first driving belt (42) penetrates through the hot air box (2), the first rotating shaft (43) is rotationally connected to the inner wall of the hot air box (2), the roller brush (44) is sleeved on the outer wall of the first rotating shaft (43), and the first driving belt (42) is sleeved at one end of the first rotating shaft (43);

Two clearance mouths (11) have been seted up to brace table (1) inside, clearance mouthful (11) set up in cylinder brush (44) bottom, brace table (1) bottom surface is fixed with layer board (14) of L font structure, peg graft between layer board (14) and brace table (1) bottom surface has recovery box (15), recovery box (15) set up in clearance mouthful (11) bottom, recovery box (15) bottom surface is connected with gim peg (151), slot (141) have been seted up to layer board (14) bottom surface, gim peg (151) peg graft in slot (141) inside.