Lamp string processing machine
By adjusting the feeding order and clamping device design of the lamp string processing machine, the conflict between the sleeve and the lamp shell combination installation is solved. It is suitable for the production of lamp strings of different sizes, improving production quality and efficiency, and ensuring the sleeve Good butt and heat shrinking effect with the lamp shell.
Patent Information
- Application Number
- CN202420945298.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing fully automatic ice strip lamp processing machine has conflicts in the feeding and combination installation process of the casing and lamp shell, and cannot effectively deal with the situation where the casing diameter is larger than the inner diameter of the casing, resulting in the casing bent or the normal docking is not possible.
A light string processing machine is designed. By adjusting the feeding order, first installing the sleeve, then installing the lamp shell, and using an arc-shaped clamping surface and clamping space in the clamping device, ensuring that the sleeve is clamping. It is then restored to a round shape, suitable for combinations of cap sleeves and casings of different sizes.
The problem of the combination installation conflict between casing and lamp shell is solved, and is suitable for the production of lamp strings of different sizes, which improves production quality and efficiency, and ensures good butt and heat shrinkage between casing and lamp shell.
Smart Images

Figure CN222176665U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mechanical processing, in particular to a lamp string processing machine. Background Art
[0002] On April 3, 2023, the applicant of this application submitted a utility model patent application entitled "A fully automatic ice bar lamp processing machine". The patent was authorized and announced on September 5, 2023, with the announcement number CN219633083U. A workbench is disclosed, on which a wire processing station and a bulb processing station are provided. There is a turntable one on the wire processing station, and 192 clamps are arranged in sequence on the outer edge of the turntable one. There are a wire feeding device one, a wire feeding device two, a wire stripping device, a wire twisting device, a sandwich installation device, an upper sleeve device and a feeding device on the workbench, and an upper cap sleeve device is arranged between the sandwich installation device and the upper sleeve device; there is a turntable two on the bulb processing station, and clamps are arranged in sequence on the outer edge of the turntable two, and there are a bubble feeding device, a foot cutting device and a resistor feeding device on the workbench. The above-mentioned fully automatic ice bar lamp processing machine realizes the fully automatic and continuous processing process of ice bar lamp strings, reduces labor costs, improves work efficiency, and ensures product quality.
[0003] However, the applicant discovered in the actual production process that the process of first installing the cap sleeve, that is, the lamp shell on each small bulb, and then installing the sleeve in the above-mentioned fully automatic ice bar lamp processing machine is only applicable to the case where the cap sleeve diameter is smaller than the inner diameter of the sleeve. If the cap sleeve diameter of the light string to be produced is larger than the inner diameter of the sleeve, the above-mentioned fully automatic ice bar lamp processing machine cannot process it. In addition, since the inner end of the cap sleeve is circular, and the sleeve is a quadrilateral after being compressed and deformed by the upper sleeve device, the outer edge of the sleeve will contact the inner end of the lamp shell, causing the sleeve to bend and tilt, and the two cannot be properly connected or the sleeve is in an inward folded state after connection. If a larger sleeve is used, although the above problem can be solved, it will affect the subsequent heat shrinkage effect. Therefore, it is necessary to optimize the existing fully automatic ice bar lamp processing machine. Utility Model Content
[0004] The purpose of the utility model is to overcome the technical problems in the prior art that the fully automatic ice bar lamp processing machine has conflicts in the feeding and assembly installation processes of the sleeve and the lamp shell, which is not conducive to the production of light strings, and to provide a light string processing machine for solving the conflicts in the feeding and assembly installation processes of the sleeve and the lamp shell, so as to improve the production quality and efficiency of the light strings.
[0005] In order to solve the above technical problems, the utility model provides a light string processing machine, including a workbench, a turntable and a first driving mechanism for driving the turntable to rotate, the outer edge of the turntable is sequentially provided with a first clamp for clamping a wire along its own circumferential direction, and the workbench is sequentially provided with a sleeve feeding device, a lamp housing feeding device, a sleeve installing device and a sleeve heating device along the rotation direction of the turntable, the sleeve installing device includes a second clamp for clamping the sleeve, a third clamp for clamping the lamp housing, and a second driving mechanism for driving the second clamp to move in the direction of the third clamp, the second clamp includes a first clamp block and a second clamp block, and the first clamping surface on the first clamp block and the second clamping surface on the second clamp block are both arranged in a circular arc shape.
[0006] As a further improvement measure of the utility model, the above-mentioned workbench is provided with a third driving mechanism for driving the first clamping block and the second clamping block to move toward each other. Under the drive of the third driving mechanism, the first clamping block is in contact with the second clamping block, and a clamping space is formed between the first clamping surface and the second clamping surface, and the clamping space is circular.
[0007] As a further improvement measure of the utility model, a first fixed frame is arranged on the above-mentioned workbench, and the sleeve feeding device includes a first pressing roller and a second pressing roller which are relatively arranged on the first fixed frame, the first pressing roller rotates under the drive of a fourth driving mechanism, and the second pressing roller moves toward the direction of the first pressing roller under the drive of a fifth driving mechanism, and a first gap for the sleeve to pass through is arranged between the first pressing roller and the second pressing roller.
[0008] As a further improvement measure of the utility model, a cutting knife assembly is arranged on the outer side of the above-mentioned first gap discharge end, and the cutting knife assembly includes a stationary knife, and a moving knife located on the side of the stationary knife away from the first gap, and a second gap for the sleeve to pass through is opened in the stationary knife, and a sixth driving mechanism for driving the moving knife to move toward the sleeve direction is arranged on the workbench.
[0009] As a further improvement measure of the utility model, a fourth clamp for clamping the sleeve and a fifth clamp for clamping the lamp bead are respectively arranged between the above-mentioned cutter assembly and the first clamp, and a seventh driving mechanism for driving the fourth clamp to move toward the direction of the first clamp is arranged on the workbench.
[0010] As a further improvement measure of the utility model, a limiting assembly is arranged on the outer side of the feed end of the above-mentioned first gap, and the limiting assembly includes a limiting plate, and a limiting block located between the limiting plate and the first gap, a third gap for the sleeve to pass through is opened in the limiting plate, and the direction in which the third gap is opened is perpendicular to the direction of the first gap, a fourth gap and a fifth gap for the sleeve to pass through and which are connected are opened in the limiting block, the fourth gap is located at one end of the limiting block facing the limiting plate, and the fourth gap is arranged in a quadrangular pyramid shape, and the fifth gap is located at one end of the limiting block away from the limiting plate, and the direction in which the fifth gap is opened is the same as the direction of the first gap.
[0011] As a further improvement measure of the utility model, a second fixed frame is arranged on the above-mentioned workbench, and the lamp housing loading device includes a conveying track arranged on the second fixed frame, and the feeding end of the conveying track is connected to a vibration plate for placing the lamp housing, and a sixth clamp for clamping the lamp housing and a seventh clamp for clamping the lamp beads are respectively arranged between the discharge end of the conveying track and the first clamp, and an eighth driving mechanism for driving the sixth clamp to move toward the direction of the first clamp is arranged on the workbench.
[0012] As a further improvement measure of the utility model, a third fixed frame is arranged on the above-mentioned workbench, and the sleeve heating device includes a hot air blower arranged on the third fixed frame. The first heating plate and the second heating plate are respectively arranged at the air outlet of the hot air blower, and a heating space is formed between the first heating plate and the second heating plate.
[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention adjusts the working sequence of the sleeve feeding device, the lamp housing feeding device and the sleeve installation device, that is, firstly sleeves the sleeve on the wire, then installs the lamp housing on the lamp bead, and finally completes the combined connection between the sleeve and the lamp housing. This is applicable to the two situations that the cap sleeve diameter of the lamp string is larger than the inner diameter of the sleeve, and the cap sleeve diameter of the lamp string is smaller than the inner diameter of the sleeve, which effectively solves the conflict in the feeding and combined installation process of the sleeve and the lamp housing in the prior art of the lamp string processing. ; 2. In the utility model, the first clamping surface on the first clamping block and the second clamping surface on the second clamping block are both set to a circular arc shape, so that under the drive of the third driving mechanism, after the first clamping block contacts the second clamping block, a circular clamping space can be formed between the first clamping surface and the second clamping surface, so that when the sleeve is clamped, the sleeve that has been compressed and deformed into a quadrilateral by the sleeve feeding device is deformed into a circle again, which is matched with the inner end of the lamp shell, making it easier to combine and install the two, which is beneficial to improving the production quality and efficiency of the light string. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1It is a stereogram of the utility model.
[0015] Figure 2 It is a top view of the utility model.
[0016] Figure 3 It is one of the enlarged stereograms of the casing feeding device in the utility model.
[0017] Figure 4 This is the second enlarged stereoscopic view of the casing feeding device in the utility model.
[0018] Figure 5 It is an enlarged top view of the casing feeding device in the utility model.
[0019] Figure 6 It is an enlarged stereoscopic view of the lamp housing feeding device in the utility model.
[0020] Figure 7 It is an enlarged top view of the lamp housing feeding device in the utility model.
[0021] Figure 8 It is an enlarged stereoscopic view of the casing installation device in the utility model.
[0022] Fig. 9 It is an enlarged left view of the casing installation device in the utility model.
[0023] Fig.10 It is an enlarged stereoscopic view of the second clamp in the utility model.
[0024] Description of the accompanying figures: 1-working table, 2-turntable, 3-first clamp, 4-sleeve feeding device, 5-lamp housing feeding device, 6-sleeve installation device, 7-sleeve heating device, 8-second clamp, 9-third clamp, 10-first clamping block, 11-second clamping block, 12-first clamping surface, 13-second clamping surface, 14-clamping space, 15-first fixing frame, 16-first pressing roller, 17-second pressing roller, 18-first space Gap, 19-static knife, 20-moving knife, 21-second gap, 22-fourth clamp, 23-fifth clamp, 24-limiting plate, 25-limiting block, 26-third gap, 27-fourth gap, 28-fifth gap, 29-second fixed frame, 30-conveying track, 31-vibrating plate, 32-sixth clamp, 33-seventh clamp, 34-third fixed frame, 35-hot air blower, 36-first heating plate, 37-second heating plate. DETAILED DESCRIPTION
[0025] The utility model will be further described below in conjunction with the accompanying drawings.
[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0027] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the following detailed description of the present invention. Those skilled in the art can fully understand the present invention without the description of these details.
[0028] like Figure 1 and Figure 2 A light string processing machine shown in the figure comprises a workbench 1, on which a turntable 2 and a first driving mechanism for driving the turntable 2 to rotate are arranged, and first clamps 3 for clamping a wire are arranged in sequence along the circumferential direction of the outer edge of the turntable 2, and the end of the wire away from the first clamp 3 is pre-connected with a lamp bead. A sleeve feeding device 4, a lamp housing feeding device 5, a sleeve installation device 6 and a sleeve heating device 7 are arranged in sequence on the workbench 1 along the rotation direction of the turntable 2. The turntable 2 drives each of the first clamps 3 to rotate, and the wires connected with the lamp beads are sequentially transported to the above-mentioned devices for processing of the upper sleeve and the upper lamp housing, so as to produce a light string that meets the requirements.
[0029] like Figure 1 , Figures 3 to 5 As shown, a first fixed frame 15 is provided on the workbench 1, and the sleeve feeding device 4 includes a first pressing roller 16 and a second pressing roller 17 which are relatively arranged on the first fixed frame 15, and a first gap 18 for the sleeve to pass through is provided between the first pressing roller 16 and the second pressing roller 17. In this embodiment, the first pressing roller 16 and the second pressing roller 17 are arranged on the left and right, and the first gap 18 is arranged along the longitudinal direction. The first pressing roller 16 rotates under the drive of the fourth driving mechanism, so that the sleeve is transported in the first gap 18 toward the first clamp 3, and at the same time, the second pressing roller 17 rotates synchronously with the first pressing roller 16 to cooperate to complete the feeding of the sleeve.
[0030] The second pressing roller 17 moves toward the first pressing roller 16 under the drive of the fifth driving mechanism. According to the set output value of the fifth driving mechanism, the size of the first gap 18 can be adjusted according to the thickness of the sleeve, so that during the working process, the first pressing roller 16 and the second pressing roller 17 can press the sleeve, so that the sleeve originally in a flat state is in a quadrilateral open state, so as to facilitate the subsequent insertion of the lamp bead and the wire. When the work is suspended, the fifth driving mechanism can drive the second pressing roller 17 to reset, that is, to move in the direction away from the first pressing roller 16 to open the first gap 18, so as to facilitate manual insertion of the sleeve into the first gap 18, or to take out and replace the sleeve from the first gap 18.
[0031] A cutter assembly is arranged outside the discharge end of the first gap 18, and the cutter assembly includes a stationary knife 19 and a moving knife 20 located on the side of the stationary knife 19 away from the first gap 18. A sixth driving mechanism for driving the moving knife 20 to move toward the sleeve is arranged on the workbench 1. The sleeve is cut according to the required length by the cooperation between the moving knife 20 and the stationary knife 19, and the stationary knife 19 is arranged to contact the side opposite to the moving knife 20, so as to ensure the flatness of the cut end of the sleeve, thereby ensuring the beauty of the light string.
[0032] A second gap 21 is provided in the stationary knife 19 for the sleeve to pass through. In the present embodiment, the second gap 21 is arranged along the longitudinal direction, and its width is greater than that of the first gap 18, and smaller than that of the sleeve in a quadrilateral state after opening. In this way, after the sleeve is compressed and deformed by the first and second compression rollers 16 and 17, the quadrilateral shape of the sleeve can be further fixed during transportation to prevent it from returning to a flat state.
[0033] like Figures 3 to 5 As shown, a fourth clamp 22 for clamping the sleeve and a fifth clamp 23 for clamping the lamp bead are respectively arranged between the cutter assembly and the first clamp 3, and a seventh driving mechanism for driving the fourth clamp to move toward the first clamp 3 is arranged on the workbench 1. Since the lamp bead has a certain weight, the wire will bend downward during the transmission process of the rotating disk 2. Therefore, the lamp bead needs to be clamped and positioned by the fifth clamp 23 first to ensure that the lamp bead and the wire are on the horizontal line corresponding to the second gap 21, so that the sleeve clamped by the fourth clamp 22 passes through the outer end of the lamp bead. After that, the fifth clamp 23 releases the lamp bead, so that the fourth clamp 22 can sleeve the sleeve on the wire under the continuous drive of the seventh driving mechanism.
[0034] like Figures 3 to 5As shown, in order to prevent the sleeve from bending and twisting during the feeding process, which may affect the first pressing roller 16 and the second pressing roller 17 from compressing and deforming it, a limiting assembly is provided on the outer side of the feeding end of the first gap 18 in this embodiment, and the limiting assembly includes a limiting plate 24 and a limiting block 25 located between the limiting plate 24 and the first gap 18. A third gap 26 is provided in the limiting plate 24 for the sleeve to pass through, and the width of the third gap 26 is adapted to the thickness of the sleeve in a flat state, and the direction in which the third gap 26 is provided is perpendicular to the direction of the first gap 18, that is, the third gap 26 is provided in the horizontal direction, and the sleeve can be straightened in the process of passing through the third gap 26, so as to ensure the horizontal transportation of the sleeve and prevent the sleeve from bending and twisting.
[0035] The limiting block 25 is provided with a fourth gap 27 and a fifth gap 28 for the sleeve to pass through and communicate with each other. The fourth gap 27 is located at the end of the limiting block 25 facing the limiting plate 24, and the fourth gap 27 is set in a quadrangular pyramid shape. The fifth gap 28 is located at the end of the limiting block 25 away from the limiting plate 24, and its width is greater than the width of the first gap 18, and less than the width of the sleeve in a quadrilateral state after opening. The direction in which the fifth gap 28 is opened is the same as that of the first gap 18, that is, the fifth gap 28 is also set in the longitudinal direction. The limiting block 25 can be used to perform preliminary deformation on the sleeve, so that the upper and lower sides of the sleeve are separated, and an inner hole is formed inside it, so as to facilitate the subsequent compression deformation of the sleeve by the first pressing roller 16 and the second pressing roller 17.
[0036] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, a second fixing frame 29 is provided on the workbench 1, and the lamp housing feeding device 5 includes a conveying track 30 provided on the second fixing frame 29. A vibrating plate 31 for placing lamp housings is connected to the feeding end of the conveying track 30. Under the vibration of the vibrating plate 31, the lamp housings are sequentially arranged on the conveying track 30 and conveyed to the discharge port of the conveying track 30. A sixth clamp 32 for clamping the lamp housing and a seventh clamp 33 for clamping the lamp beads are respectively provided between the discharge end of the conveying track 30 and the first clamp 3. An eighth driving mechanism for driving the sixth clamp 32 to move toward the first clamp 3 is provided on the workbench 1.
[0037] Similar to the sleeve feeding device 4, the lamp bead is first clamped and positioned by the seventh clamp 33 to ensure that the lamp bead and the wire are on a horizontal line corresponding to the discharge end of the conveying track 30, so that the lamp housing clamped by the sixth clamp 32 passes through the outer end of the lamp bead. After that, the seventh clamp 33 releases the lamp bead, so that the sixth clamp 32 can install the lamp housing on the lamp bead under the continuous drive of the eighth driving mechanism.
[0038] After the sleeve is set on the lamp bead and the wire and the lamp housing is installed, the sleeve and the lamp housing need to be combined together to achieve sealing. Figure 1 , Figure 8 and Fig. 9 As shown, the sleeve installation device 6 includes a second fixture 8 for clamping the sleeve, a third fixture 9 for clamping the lamp housing, and a second driving mechanism for driving the second fixture 8 to move toward the third fixture 9. The second fixture 8 includes a first clamping block 10 and a second clamping block 11, and a third driving mechanism for driving the first clamping block 10 and the second clamping block 11 to move toward each other is provided on the workbench 1. The lamp housing is clamped and positioned by the third fixture 9, and the second fixture 8 clamps and transfers the sleeve sleeved on the wire under the drive of the second driving mechanism and the third driving mechanism, so that the outer end of the sleeve is sleeved on the inner end of the lamp housing.
[0039] Since the inner end of the lamp housing is round and the sleeve is a quadrilateral, the outer edge of the sleeve will come into contact with the inner end of the lamp housing, causing the sleeve to bend or tilt, and the two cannot be properly connected or the sleeve will be folded inward after connection. If a larger sleeve is used, although the above installation problem can be solved, it will affect the subsequent heat shrinking effect. Figures 8 to 10 As shown, in this embodiment, the first clamping surface 12 on the first clamping block 10 and the second clamping surface 13 on the second clamping block 11 are both set to be arc-shaped, so that under the drive of the third driving mechanism, after the first clamping block 10 and the second clamping block 11 come into contact, a circular clamping space 14 can be formed between the first clamping surface 12 and the second clamping surface 13, so that when the sleeve is clamped, the quadrilateral sleeve is deformed into a circle to match the inner end of the lamp housing, which is more convenient for the combined installation between the two.
[0040] like Figure 1 and Figure 2 As shown, a third fixing frame 34 is provided on the workbench 1, and the sleeve heating device 7 includes a hot air blower 35 arranged on the third fixing frame 34, and a first heating plate 36 and a second heating plate 37 are respectively provided at the air outlet of the hot air blower 35, and a heating space is formed between the first heating plate 36 and the second heating plate 37 to heat the sleeve so that it shrinks and is fixed between the outer surface of the lamp housing and the outer surface of the wire.
[0041] like Figure 1 and Figure 2 As shown, in this embodiment, as one solution, the driving mechanisms involved above can all be driven by a cam device located below the workbench 1; as another solution, the driving mechanisms involved above can be set as servo motors or cylinders.
[0042] The above describes the implementation mode of the utility model in detail in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation mode. For ordinary technicians in this field, several modifications and improvements can be made without departing from the present invention, and these should also be regarded as belonging to the protection scope of the present utility model.
Claims
1. A light string processing machine, comprising a workbench (1), the workbench (1) being provided with a turntable (2), and a first driving mechanism for driving the turntable (2) to rotate, the outer edge of the turntable (2) being provided with first clamps (3) for clamping a wire in sequence along its circumferential direction, characterized in that: The workbench (1) is provided with a sleeve feeding device (4), a lamp housing feeding device (5), a sleeve installation device (6) and a sleeve heating device (7) in sequence along the rotation direction of the turntable (2); the sleeve installation device (6) comprises a second clamp (8) for clamping the sleeve, a third clamp (9) for clamping the lamp housing, and a second driving mechanism for driving the second clamp (8) to move in the direction of the third clamp (9); the second clamp (8) comprises a first clamp block (10) and a second clamp block (11); a first clamping surface (12) on the first clamp block (10) and a second clamping surface (13) on the second clamp block (11) are both arranged in an arc shape.
2. The light string processing machine according to claim 1, characterized in that: The workbench (1) is provided with a third driving mechanism for driving the first clamping block (10) and the second clamping block (11) to move toward each other. Under the drive of the third driving mechanism, the first clamping block (10) and the second clamping block (11) are in contact with each other, and a clamping space (14) is formed between the first clamping surface (12) and the second clamping surface (13), and the clamping space (14) is circular.
3. The light string processing machine according to claim 2, characterized in that: The workbench (1) is provided with a first fixed frame (15), and the sleeve feeding device (4) comprises a first pressing roller (16) and a second pressing roller (17) which are arranged relative to the first fixed frame (15), the first pressing roller (16) rotates under the drive of a fourth driving mechanism, and the second pressing roller (17) moves toward the first pressing roller (16) under the drive of a fifth driving mechanism, and a first gap (18) is provided between the first pressing roller (16) and the second pressing roller (17) for the sleeve to pass through.
4. The light string processing machine according to claim 3, characterized in that: A cutter assembly is arranged outside the discharge end of the first gap (18), the cutter assembly comprising a stationary knife (19) and a movable knife (20) located on a side of the stationary knife (19) away from the first gap (18), a second gap (21) for the sleeve to pass through is opened in the stationary knife (19), and a sixth driving mechanism for driving the movable knife (20) to move towards the sleeve is arranged on the workbench (1).
5. The light string processing machine according to claim 4, characterized in that: A fourth clamp (22) for clamping a sleeve and a fifth clamp (23) for clamping a lamp bead are respectively arranged between the cutter assembly and the first clamp (3), and a seventh driving mechanism for driving the fourth clamp to move towards the first clamp (3) is arranged on the workbench (1).
6. The light string processing machine according to claim 5, characterized in that: A limiting assembly is arranged outside the feeding end of the first gap (18), the limiting assembly comprising a limiting plate (24) and a limiting block (25) located between the limiting plate (24) and the first gap (18); a third gap (26) is provided in the limiting plate (24) for the sleeve to pass through, the direction in which the third gap (26) is opened is perpendicular to the direction of the first gap (18); a fourth gap (27) and a fifth gap (28) are provided in the limiting block (25) for the sleeve to pass through and are connected; the fourth gap (27) is located at one end of the limiting block (25) facing the limiting plate (24), and the fourth gap (27) is arranged in a quadrangular pyramid shape; the fifth gap (28) is located at one end of the limiting block (25) away from the limiting plate (24), and the direction in which the fifth gap (28) is opened is the same as the direction of the first gap (18).
7. The light string processing machine according to claim 6, characterized in that: The workbench (1) is provided with a second fixing frame (29), the lamp housing loading device (5) comprises a conveying track (30) arranged on the second fixing frame (29), a feeding end of the conveying track (30) is connected to a vibration plate (31) for placing the lamp housing, a sixth clamp (32) for clamping the lamp housing and a seventh clamp (33) for clamping the lamp bead are respectively arranged between the discharge end of the conveying track (30) and the first clamp (3), and an eighth driving mechanism for driving the sixth clamp (32) to move toward the first clamp (3) is arranged on the workbench (1).
8. The light string processing machine according to claim 7, characterized in that: A third fixing frame (34) is arranged on the workbench (1), and the sleeve heating device (7) comprises a hot air blower (35) arranged on the third fixing frame (34), and a first heating plate (36) and a second heating plate (37) are respectively arranged at the air outlet of the hot air blower (35), and a heating space is formed between the first heating plate (36) and the second heating plate (37).
