Heat dissipation guide roller for film blow molding

Abstract

The utility model discloses a heat dissipation guide roller for film blow molding, and relates to the field of production devices. The device comprises a hollow pipe, a sleeve is inserted into the outer pipe wall of the hollow pipe through a spline and a key groove which are arranged in a matched mode, the two ends of the sleeve are each of a wide-mouth structure, and the sleeve and the hollow pipe are positioned and installed through a positioning piece. Sealing plugs are detachably arranged at the two ends of the hollow pipe, a supporting pipe is coaxially arranged in the hollow pipe through a supporting piece, and the two ends of the supporting pipe penetrate through the sealing plugs and are rotationally installed with the sealing plugs; the outer side wall of the supporting pipe is fixedly sleeved with fins in the length direction, the fins are located in the hollow pipe, and the diameter of the fins is smaller than the inner pipe diameter of the hollow pipe. The utility model has the beneficial effects that the hollow pipe guides the film through the sleeve sleeved outside the hollow pipe, the sleeve is convenient to disassemble and assemble, the use cost is reduced, the fins increase the contact area between the supporting pipe and the hollow pipe, and the heat dissipation efficiency and the heat dissipation effect of the sleeve are improved.

Description

Technical Field

[0001] The utility model belongs to the field of production devices, relates to the field of film blow molding, and specifically relates to a heat dissipation guide roller for film blow molding. Background Art

[0002] Film blow molding is a molding technology that uses an extruder to mold molten plastic into a film tube, and then blows compressed air into the tube from the center of the die head, forcing the tube to expand and deform at high temperature and transform into a tubular film. When using film blow molding technology to produce film, after the film is extruded from the extruder, it needs to be guided so that it goes through a series of steps for further processing and finally rolled up.

[0003] When using guide rollers to guide the film on the current production line, the commonly used guide rollers are single roller structures. Since the film still retains heat during the transmission process, it will cause the film to shrink or expand when it moves with the guide roller, thereby affecting the stability of the film size and causing damage, affecting its performance. Therefore, when guiding the film, the film needs to be cooled and cooled to shape the film in time. In order to solve the residual heat on the film, metal guide rollers are usually used to cool the film by utilizing the heat dissipation of the metal. However, due to the continuous use of the guide roller, the heat on the guide roller cannot be dissipated in time, causing the cooling effect of the film to continue to decline as the use time of the guide roller increases, reducing the cooling performance.

[0004] In order to solve the technical problem of poor heat dissipation of metal guide rollers, a cooling system is now connected to the guide rollers to dissipate heat from the guide rollers using circulating water or air, thereby continuously cooling the film. However, since the guide rollers currently used are an integrated fixed structure, when the guide rollers are damaged, they need to be replaced as a whole, resulting in high cost of use. Utility Model Content

[0005] In order to solve the technical problems of poor heat dissipation effect of the guide roller and high use cost of the integrated structure, the utility model provides a heat dissipation guide roller formed by film blow molding. The empty tube guides the film through the sleeve sleeved on the outside, the sleeve is easy to disassemble and assemble, and the use cost is reduced. The fins increase the contact area between the support tube and the empty tube, and improve the heat dissipation efficiency and heat dissipation effect of the sleeve.

[0006] The technical solution adopted by the utility model is: to provide a film blow-molded heat dissipation guide roller, comprising an empty tube, an outer tube wall of the empty tube is plugged with a sleeve by means of matching splines and keyways, both ends of the sleeve are wide-mouth structures, and the sleeve is positioned and installed with the empty tube by means of positioning pieces; both ends of the empty tube are detachably provided with sealing plugs, a support tube is coaxially provided in the empty tube through a support piece, both ends of the support tube pass through the sealing plugs, and are rotatably installed with the sealing plugs; a fin is fixedly sleeved on the outer side wall of the support tube along the length direction, the fin is located in the empty tube, and the diameter of the fin is smaller than the inner tube diameter of the empty tube.

[0007] The sleeve sleeved on the outer wall of the empty tube is fixed on the empty tube by splines, keyways and positioning parts, so that the sleeve and the empty tube rotate in coordination, and the two ends of the empty tube are sealed by sealing plugs, and the support tube assembled in the empty tube with the help of support parts passes through the sealing plugs at both ends, so that the empty tube can be assembled on the production line through the support tube, and the empty tube and the sleeve rotate along the support tube, reducing the guiding resistance of the sleeve to the film, and after the external air source is introduced into the support tube, the air flow in the support tube is promoted, so as to dissipate heat and cool the empty tube, and the fins evenly distributed on the support tube increase the contact area with the empty tube, thereby improving the heat dissipation and cooling effect and heat dissipation and cooling efficiency of the empty tube, and the empty tube cools the film supported by it through the sleeve, and the wide-mouth structure at both ends of the sleeve prevents the film from detaching from the sleeve, thereby improving production safety.

[0008] To further optimize the technical solution, the spline is arranged on the outer tube wall of the empty tube, the keyway is arranged on the inner tube wall of the sleeve, and the spline is plugged into the keyway.

[0009] When the sleeve is plugged into the empty pipe, the keyway and the spline are plugged into each other to guide the plugging, making the plugging smooth, and the sleeve is axially fixed to avoid empty rotation of the sleeve, thereby improving the reliability of use.

[0010] To further optimize the technical solution, the positioning member includes positioning blocks threadedly connected at both ends of the empty tube, the positioning blocks abut against the inner tube walls at both ends of the sleeve, and levers are evenly arranged along the circumferential direction on the outer wall of the positioning block away from the sleeve.

[0011] The positioning block is threadedly connected to the empty tube and abuts against the inner tube wall of the sleeve, and then the sleeve is clamped and fixed to prevent the sleeve from moving along the length direction of the empty tube, thereby improving the reliability of film guidance. The positioning block is pushed into the sleeve, and the lever on the outer wall of the positioning block protrudes from the sleeve, which facilitates the rotation of the positioning block, making its assembly simple and flexible.

[0012] To further optimize the technical solution, the sealing plugs are all sealed and plugged into the empty pipes, and are pinned to the empty pipes with the help of pin connectors; the sealing plugs are coaxially provided with through holes, and both ends of the support pipes respectively pass through the through holes and are rotatably installed with the through holes, and the support members and the sealing plugs are detachably installed.

[0013] After the sealing plug is plugged into the empty pipe, the two ends of the support pipe pass out through the through holes on the sealing plug respectively. After the support member used to assemble the support pipe is assembled with the sealing plug, the sealing plug is pinned and fixed to the empty pipe to support the support pipe. The operation is simple, and it is easy to disassemble and assemble, and convenient for maintenance.

[0014] To further optimize the technical solution, the support member includes bearings sleeved on both ends of the support tube, the outer walls of the bearings are sleeved with support rings, and the diameter of the support rings is smaller than the diameter of the empty tube, and the support rings can be detachably installed with the help of locking members and sealing plugs.

[0015] The bearing is assembled with the sealing plug through the support ring. The bearing is arranged on both sides of the support tube and is used for the rotational assembly of the support tube and the empty tube, so as to reduce the rotational resistance and the guiding resistance of the film.

[0016] To further optimize the technical solution, the locking device includes a plurality of sets of matching bolts and nuts, the bolts are circumferentially distributed on the support ring and threadedly connected to the support ring, and the bolts penetrate the support ring and the sealing plug in turn and are threadedly connected to the nuts, which abut against the outer wall of the sealing plug.

[0017] The bolts connected to the support ring pass through the sealing plug and are connected to the nuts to lock and fix the support ring on the sealing plug. Multiple sets of matching bolts and nuts are provided to improve the stability and firmness of the assembly and ensure reliability in use.

[0018] To further optimize the technical solution, retaining rings are provided on both sides of the bearing, the retaining rings are in contact with the end faces of the bearings, and are clamped with the outer tube wall of the support tube.

[0019] The retaining rings arranged on both sides of the bearing limit the bearing to ensure the stability of operation.

[0020] To further optimize the technical solution, the pin connection member includes a pin connected to the empty tube and a slot arranged on the sealing plug, and the pin and the slot are interference-fitted.

[0021] After the pin of the pin connection on the empty pipe is interference-fitted with the slot on the sealing plug, the sealing plug is pin-connected and fixed on the empty pipe. The operation is easy, the structure is simple, and the use is stable and reliable.

[0022] To further optimize the technical solution, the empty tube is provided with a pin connection hole, the pin connection hole corresponds to the position and number of the slots, and the latch is slidably plugged into the pin connection hole.

[0023] The empty pipe is provided with pin connection holes for the plug to be pinned thereto, and the positions and numbers of the pin connection holes correspond to those on the sealing plug, so as to facilitate the pin connection thereto.

[0024] The beneficial effects of the utility model are:

[0025] 1. When the sleeve is plugged into the empty tube, the wide-mouth structure at both ends of the sleeve increases the inlet area and makes plugging convenient. The sleeve and the empty tube are axially fixed by splines and keyways to prevent the sleeve from spinning in vain. The sleeve is fixed in position by positioning blocks at both ends of the empty tube to prevent the sleeve from moving along the length direction of the sleeve, thereby improving the stability of the film guide. The wide-mouth structure at both ends of the sleeve prevents the film from detaching from the sleeve, and the smooth surface of the sleeve avoids damage to the film, thereby improving the safety of use.

[0026] 2. After the sealing plug is plugged into the empty tube and fixed by means of a pin, the two ends of the support tube pass through the through holes on the sealing plug respectively, so that the empty tube and the sleeve can be supported by the support tube. The bearing on the support tube passes through the sealing plug through the bolts on the support ring and is tightened and fixed with the help of nuts, thereby fixing the support tube and making the empty tube and the sleeve rotate smoothly along the support tube, thereby reducing the guiding resistance to the film;

[0027] 3. Connect the support tube to the external air source to promote the air flow in the support tube, and then cool down the empty tube. The fins evenly distributed on the support tube increase the contact area between the support tube and the empty tube, and improve the heat dissipation and cooling rate and effect of the empty tube. The empty tube cools down the casing, so that the film is cooled down when it moves along the casing, and the production effect is improved.

[0028] 4. The diameter of the fin placed in the empty tube through the support tube is smaller than the inner tube diameter of the empty tube, so that the empty tube can be placed smoothly in the empty tube, and when the empty tube rotates along the support tube, the contact and wear between the fin and the empty tube are avoided, thereby improving the safety of use. At the same time, the diameter of the bearing and support ring used to support the support tube is also smaller than the inner diameter of the empty tube, thereby avoiding interference during use and ensuring stable and safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the internal structure of the empty tube of the utility model;

[0031] Figure 3 It is a structural schematic diagram of the empty pipe and the positioning block of the utility model in a separated state;

[0032] Figure 4 It is a structural schematic diagram of the sleeve of the utility model;

[0033] Figure 5 It is a structural schematic diagram of the support tube and fin assembly of the utility model;

[0034] Figure 6 It is a cross-sectional structural diagram of the support tube and the sealing plug of the utility model;

[0035] Figure 7 It is a structural schematic diagram of the support ring and the sealing plug of the utility model in a disassembled state.

[0036] In the figure, 1, empty tube; 101, spline; 102, latch; 103, pin hole; 2, sleeve; 201, keyway; 3, sealing plug; 301, through hole; 302, slot; 4, support tube; 401, fin; 402, bearing; 4021, support ring; 403, retaining ring; 5, positioning block; 501, lever; 6, bolt; 7, nut. DETAILED DESCRIPTION

[0037] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Please see attached Figure 1-3 The heat dissipation guide roller formed by film blow molding comprises an empty tube 1, and sealing plugs 3 are detachably provided at both ends of the empty tube 1, and the sealing plug 3 is sealed and connected with the empty tube 1 in a plug-in manner, and the sealing plug 3 is pinned with the empty tube 1 by means of a pin connector, and the pin connector comprises a pin 102 pinned on the empty tube 1, and the empty tube 1 is provided with a pin connection hole 103 for plugging the pin 102, and the sealing plug 3 is provided with a slot 302, and the slot 302 corresponds to the position and number of the pin connection hole 103 on the empty tube 1 , so that the latch pin 102 and the slot 302 are inserted in an interference fit, thereby the sealing plug 3 is pinned and fixed on the empty pipe 1. A support tube 4 is coaxially arranged in the empty pipe 1 with the help of a support member. The support member and the sealing plug 3 are detachably installed, which is convenient for disassembly and maintenance. Both ends of the support tube 4 penetrate the sealing plug 3 and are rotatably installed with the sealing plug 3, so that the support tube 4 supports the sealing plug 3. The sealing plug 3 is coaxially provided with a through hole 301, which facilitates the penetration and rotation of the support tube 4 and is flexible in use;

[0039] Please see attached Figure 5 , Attachment Figure 6The support member includes a bearing 402 sleeved on both ends of a support ring 4021. A retaining ring 403 is arranged on both sides of the bearing 402. The retaining ring 403 is clamped with the outer tube wall of the support tube 4 and abuts against the end faces of both sides of the bearing 402, so as to limit the position of the bearing 402 and ensure the stability of the bearing 402 during use. The outer wall of the bearing 402 is sleeved with a support ring 4021, and the support ring 4021 is used for assembling the bearing 402 and the sealing plug 3. The diameter of the support ring 4021 is smaller than the diameter of the empty tube 1, which is convenient for placing the bearing 402 and the support ring 4021 in the empty tube 1 for use. The support ring 4021 is connected to the sealing plug with the help of a locking member. 3 can be detachably installed, and the locking parts can be selected from multiple sets of matching bolts 6 and nuts 7 to improve the stability and reliability of assembly. The bolts 6 are threadedly connected to the support ring 4021 and are circumferentially distributed on the support ring 4021, and the bolts 6 penetrate the support ring 4021 and the sealing plug 3 outward. The sealing plug 3 is provided with a plug hole to facilitate the bolt 6 to pass through. After the bolt 6 passes through the sealing plug 3, it is threadedly connected with the nut 7. After the nut 7 abuts against the outer wall of the sealing plug 3, the support ring 4021 is tightened and fixed on the sealing plug 3, and the empty tube 1 is supported. After the two ends of the support tube 4 are fixed on the film blowing production line, the empty tube 1 is supported;

[0040] Please see attached Figure 2 The fins 401 are evenly fixedly installed on the support tube 4 along the length direction. The diameter of the fins 401 is smaller than the inner diameter of the empty tube 1, so that the fins 401 are placed in the empty tube 1 along with the support tube 4. After the two ends of the support tube 4 are fixed on the production line, the two ends of the support tube 4 are connected to the external air source. The air source is injected into the support tube 4 and flows along the support tube 4, taking away the heat in the support tube 4 and the empty tube 1. The fins 401 increase the contact area with the empty tube 1, thereby increasing the heat dissipation and cooling effect and heat dissipation and cooling efficiency in the empty tube 1;

[0041] Please see attached Figure 1 And attached Figure 3-4The outer wall of the empty tube 1 is plugged with the sleeve 2 by means of the matching spline 101 and keyway 201. The spline 101 is arranged on the outer tube wall of the empty tube 1, and the keyway 201 is arranged on the inner tube wall of the sleeve 2. When the sleeve 2 is plugged with the empty tube 1, the spline 101 and the keyway 201 play a guiding role, and both ends of the sleeve 2 are wide-mouth structures, which increase the inlet area of ​​the sleeve 2, making it labor-saving and simple to plug with the empty tube 1. After the spline 101 and the keyway 201 are plugged, the sleeve 2 and the empty tube 1 can rotate freely. The position is fixed upward so that the sleeve 2 rotates with the empty tube 1 to prevent the sleeve 2 from rotating in vain, and the sleeve 2 is positioned and installed on the empty tube 1 with the help of a positioning piece to prevent the sleeve 2 from falling off the empty tube 1. After the blow-molded film is guided onto the sleeve 2, the wide-mouth structures at both ends of the sleeve 2 restrict the film to prevent it from slipping off the sleeve 2. In addition, the support tube 4 dissipates heat and cools the sleeve 2 through the empty tube 1, and cools the film, thereby improving the stability and safety of the film forming guide;

[0042] Please see attached Figure 2 , Attachment Figure 3 The positioning piece used for positioning the sleeve 2 is a positioning block 5 threadedly connected at both ends of the empty tube 1. The positioning block 5 abuts against the inner tube wall at both ends of the sleeve 2 to limit the movement of the sleeve 2 along the length direction of the empty tube 1, so as to position the sleeve 2, and the positioning block 5 is pushed into the sleeve 2 to position it, so that the outer tube wall of the sleeve 2 remains smooth, avoiding damage to the film and improving the safety of its guiding use. The outer wall of the positioning block 5 away from the sleeve 2 is evenly provided with a lever 501 along the circumferential direction. The positioning block 5 is rotated by the lever 501 so that it is threadedly connected with the empty tube 1. Since the positioning block 5 is pushed into the sleeve 2, the lever 501 protrudes outward, which is convenient for rotating the positioning block 5 and saves effort in use.

[0043] The working principle of the heat dissipation guide roller formed by film blow molding is as follows: the sleeve 2 is plugged into the empty tube 1 and fixed in the axial direction by means of the spline 101 and the keyway 201. The positioning block 5 is threadedly connected to the empty tube 1 so that it abuts against the inner wall of the sleeve 2, and then the sleeve 2 is positioned on the empty tube 1. Then, the support tube 4 equipped with the fins 401 is pushed into the empty tube 1. When the sealing plug 3 is used to seal both ends of the empty tube 1, the support tube 4 passes through the through hole 301 on the sealing plug 3. As the sealing plug 3 is plugged into the empty tube 1, the angle of the sealing plug 3 is adjusted so that the bolt 6 on the support ring 4021 is plugged into the sealing plug 3. After the sealing plug 3 is plugged into the empty tube 1, the pin 102 is used to pin-connect and fix the empty tube 1 and the sealing plug 3. Then, the nut 7 is screwed onto the bolt 6, and after abutting against the sealing plug 3, the positions of the support ring 4021 and the bearing 402 are fixed, so that the support tube 4 is coaxially assembled in the empty tube 1.

[0044] Both ends of the support tube 4 pass through the empty tube 1 so as to fix it on the production line, connect the external air source to the empty tube 1, and inject air into the support tube 4. The air flow of the support tube 4 is used to reduce its own temperature and dissipate heat and cool the empty tube 1. The fins 401 on the support tube 4 increase the contact area with the empty tube 1, thereby improving the heat dissipation and cooling efficiency and heat dissipation and cooling effect in the empty tube 1. The empty tube 1 performs synchronous heat dissipation and cooling on the sleeve 2. After the blow-molded film is introduced onto the sleeve 2, the film is cooled to improve the molding effect of the film. The sleeve 2 and the empty tube 1 rotate along the support tube 4 through the bearing 402 to reduce the guiding resistance of the film. The wide-mouth structure at both ends of the sleeve 2 limits the film to prevent the film from detaching from the sleeve 2. In addition, the outer surface of the sleeve 2 is smooth to avoid damage to the sleeve 2, thereby improving the flexibility and safety of use.

Claims

1. A heat dissipation guide roller for film blow molding, characterized in that: The invention comprises an empty tube (1), wherein the outer tube wall of the empty tube (1) is plugged with a sleeve (2) by means of a matching spline (101) and a keyway (201), both ends of the sleeve (2) are wide-mouth structures, and the sleeve (2) is positioned and installed with the empty tube (1) by means of a positioning piece; sealing plugs (3) are detachably arranged at both ends of the empty tube (1), a support tube (4) is coaxially arranged in the empty tube (1) through a support piece, both ends of the support tube (4) penetrate the sealing plug (3), and are rotatably installed with the sealing plug (3); a fin (401) is fixedly sleeved on the outer side wall of the support tube (4) along the length direction, the fin (401) is located in the empty tube (1), and the diameter of the fin (401) is smaller than the inner tube diameter of the empty tube (1).

2. The heat dissipation guide roller for film blow molding according to claim 1, characterized in that: The spline (101) is arranged on the outer tube wall of the empty tube (1), the keyway (201) is arranged on the inner tube wall of the sleeve (2), and the spline (101) and the keyway (201) are plugged into each other.

3. The heat dissipation guide roller for film blow molding according to claim 1, characterized in that: The positioning member comprises positioning blocks (5) threadedly connected at both ends of the empty tube (1), the positioning blocks (5) abutting against the inner tube walls at both ends of the sleeve (2), and levers (501) are evenly arranged along the circumferential direction on the end of the outer wall of the positioning block (5) away from the sleeve (2).

4. The heat dissipation guide roller for film blow molding according to claim 1, characterized in that: The sealing plugs (3) are all sealed and plugged with the empty pipe (1), and are pinned with the empty pipe (1) by means of a pin connector; a through hole (301) is coaxially arranged on the sealing plugs (3), and both ends of the support pipe (4) respectively penetrate the through hole (301) and are rotatably mounted with the through hole (301), and the support member and the sealing plug (3) are detachably mounted.

5. The heat dissipation guide roller for film blow molding according to claim 4, characterized in that: The support member comprises bearings (402) sleeved on both ends of the support tube (4); the outer walls of the bearings (402) are sleeved with support rings (4021); the diameter of the support rings (4021) is smaller than the diameter of the empty tube (1), and the support rings (4021) can be detachably installed with the aid of a locking member and a sealing plug (3).

6. The heat dissipation guide roller for film blow molding according to claim 5, characterized in that: The locking member comprises a plurality of sets of bolts (6) and nuts (7) which are arranged in a matching manner. The bolts (6) are circumferentially distributed on the support ring (4021) and are threadedly connected to the support ring (4021). The bolts (6) sequentially penetrate the support ring (4021) and the sealing plug (3) and are threadedly connected to the nuts (7). The nuts (7) abut against the outer wall of the sealing plug (3).

7. The heat dissipation guide roller for film blow molding according to claim 5, characterized in that: Circlips (403) are provided on both sides of the bearing (402), and the circlips (403) are in contact with the end faces of the bearing (402) and are clamped with the outer tube wall of the support tube (4).

8. The heat dissipation guide roller for film blow molding according to claim 4, characterized in that: The pin connection part comprises a pin (102) pinned on the empty pipe (1) and a slot (302) arranged on the sealing plug (3), and the pin (102) and the slot (302) are interference-fitted.

9. The heat dissipation guide roller for film blow molding according to claim 8, characterized in that: The empty tube (1) is provided with a pin connection hole (103), the pin connection hole (103) corresponds to the position and number of the slot (302), and the latch (102) is slidably plugged into the pin connection hole (103).

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