A device for coating the surface of an enameled wire with hot wax and a method of operating the same

Abstract

This invention discloses a hot wax coating device and its operating method for enameled wire, relating to the field of enameled wire waxing technology. It includes a fixed frame surrounded by a workstation frame. The enameled wire is unwound and wound using a release and take-up drum of an unwinding assembly. Then, an adjusting and shifting assembly on a lifting assembly applies waxing conditions to the fine, medium, and coarse enameled wires through fine wire coating heads, medium wire coating heads, and coarse wire coating heads. Wax is supplied by a wax supply assembly and a wax delivery assembly on a wax supply cylinder. This invention allows for flexible switching between different specifications of the incoming enameled wire: fine and ultra-fine, medium and coarse. Fine and ultra-fine wires use a spray coating method, medium wires use a felt contact method, and coarse wires use a mold dip coating method. This enables adaptive switching of waxing operations for different specifications of enameled wires, as well as dynamic waxing and scraping effects through vertical lifting, and eliminates the need for replacement.

Description

Technical Field

[0001] This invention relates to the field of enameled wire waxing technology, and in particular to a device for hot wax coating of enameled wire surface and its operating method. Background Technology

[0002] Enamelled wire is a major type of winding wire, consisting of a conductor and an insulation layer. The bare wire is softened by annealing and then coated with enamel multiple times and baked. In order to make the enamelled wire perform better, it needs to be coated with wax. The core of waxing enamelled wire is to reduce friction, protect the enamel film, improve the winding yield and efficiency, and at the same time assist in moisture protection, insulation and welding process adaptation.

[0003] During the wax coating process for enameled wire, due to the different specifications of the enameled wire, there are different specifications such as fine and ultra-fine, medium and thick. Currently, the wax coating methods on the market can basically meet the wax coating needs of one specification of enameled wire at a time. It is necessary to frequently change the waxing head that is compatible with the enameled wire. This is not only troublesome and time-consuming, but also prone to mis-installation during the replacement process, resulting in the waxing head and the enameled wire being incompatible. This leads to incorrect wax coating thickness and requires rework, which is not worth the effort. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing hot wax coating devices and operating methods for enameled wire surfaces, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to solve the adaptive switching waxing operation for enameled wires of different specifications and types, such as fine and ultra-fine, medium and coarse.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hot wax coating device for enameled wire surface, comprising a fixed frame surrounded by a workstation frame, and an enameled wire is unwound and wound by a release drum and a take-up drum of an unwinding assembly, and then the enameled wire is applied to fine, medium and coarse specifications of enameled wire by an adjustment assembly and a positional assembly through a fine wire coating head, a medium wire coating head and a coarse wire coating head, and the wax liquid is supplied by a wax supply assembly and a wax delivery assembly on a wax supply cylinder, and the cooling assembly and cooling delivery assembly on a cooling cylinder provide a setting cold air supply.

[0008] As a preferred embodiment of the hot wax coating device and its operation method for enameled wire surface described in this invention, the lifting assembly includes a double-headed motor embedded in the bottom of the fixed frame, and a reciprocating lead screw that rotates with the fixed frame is fixed to one output shaft of the double-headed motor via a coupling. A lead screw sleeve is threaded onto the reciprocating lead screw. Support arm ring frames are fixed on both sides of the lead screw sleeve. A vertical through groove that slides with the support arm ring frame is opened on the outer side of the fixed frame, and a protective cover is fixed on the outer side of the support arm ring frame. An industrial camera for monitoring the wax coating of enameled wire is obliquely fixed on the outer side of the two sets of protective covers.

[0009] As a preferred embodiment of the hot wax coating device and its operation method for enameled wire surface described in this invention, the adjusting component includes a rack plate longitudinally embedded on the outside of the fixing frame, and an electric push rod rotating inside the protective cover. Two electric push rods are fixed with shifting gears that mesh with the rack plate for adjustment. A first bracket and a second bracket are respectively fixed to the shifting gears via concentric rods. The first bracket is fixed to the fine wire coating head, the medium wire coating head, and the coarse wire coating head in a triangular equidistant arrangement. An angle sensor is fixed to the two concentric rods. Ratchets are sleeved on the two electric push rods, and pawls that rotate with the protective cover are engaged on the ratchet wheels. Springs fixed to the protective cover are fixed to the outside of the two sets of pawls, and an angle motor is fixed to the outside of the pawls.

[0010] As a preferred embodiment of the hot wax coating device and its operating method for enameled wire surface described in this invention, the following is provided: the switching component includes an atomizing nozzle circumferentially connected within the fine wire coating head, used for waxing fine and ultra-fine enameled wires; a high-density wear-resistant felt is inserted within the medium wire coating head, used for waxing medium-sized enameled wires; and a precision wax-impregnation mold hole is opened within the coarse wire coating head, used for waxing coarse-sized enameled wires; the outer ends of the fine wire coating head, medium wire coating head, and coarse wire coating head are respectively threadedly connected to a fine wire straightening head, a medium wire straightening head, and a coarse wire straightening head; and the outer side of the second bracket is provided with a fine wire wax scraper head, a medium wire wax scraper head, and a coarse wire wax scraper head, used for wax scraping fine, medium, and coarse-sized enameled wires.

[0011] As a preferred embodiment of the hot wax coating device and its operation method for enameled wire surface described in this invention, the wax supply assembly includes a large bevel gear sleeved on one output shaft of a dual-head motor, and a first small bevel gear meshing with the outer side of the large bevel gear. A first cam is fixed to the outer side of the first small bevel gear, and a first connecting rod rotates to the outer side of the first cam. A wax supply piston that slides and performs work with the wax supply cylinder is hinged to the outer side of the first connecting rod. The top of the wax supply cylinder is connected to a first four-way valve with a quantitative sensor. The top of the first four-way valve is connected to a wax supply pipe with a suction head, and the bottom of the wax supply pipe is connected to a wax storage tank with a lid and a liquid level sensor. The bottom of the wax storage tank is covered with an electric heating base with an electric heating tube.

[0012] As a preferred embodiment of the hot wax coating device and its operation method for enameled wire surface described in this invention, the wax feeding assembly includes a wax discharge pipe connected to the inner end of a first four-way valve, and a first metal flexible tube connected to the top end of the wax discharge pipe. A first rotating head is connected to the first metal flexible tube, and a first connecting head that rotates with the first rotating head is connected to a first support. The first rotating head and the first connecting head maintain a rotating and interconnected state. A wax supply channel with a first electrically controlled valve is provided inside the first support. A flow chamber connected to the wax supply channel is provided in the annular shape inside the fine wire coating head, the medium wire coating head, and the coarse wire coating head. A through hole for supplying wax to the atomizing nozzle, the high-density wear-resistant felt, and the precision wax impregnation mold hole is provided inside the flow chamber.

[0013] As a preferred embodiment of the hot wax coating device and its operation method for enameled wire surface described in this invention, the cooling component includes a second small bevel gear meshing with the outer side of a large bevel gear, and a second cam is fixed to the outer side of the second small bevel gear. A second connecting rod rotates to the outer side of the second cam, and a cooling piston that slides and performs work with the cooling cylinder is hinged to the outer side of the second connecting rod. The top of the cooling cylinder is connected to a second four-way valve with a temperature sensor, the top of the second four-way valve is connected to a cooling pipe, and the bottom of the cooling pipe is connected to a refrigerator fixed to a mounting bracket.

[0014] As a preferred embodiment of the hot wax coating device and its operation method for enameled wire surface described in this invention, the cooling component includes a cooling pipe connected to the inner end of a second four-way valve, and a second metal flexible tube connected to the top of the cooling pipe. A second rotating head is connected to the second metal flexible tube, and a second connecting head that rotates with the second rotating head is connected to the second bracket. The second rotating head and the second connecting head maintain a rotating and interconnected state. A cooling channel with a second electrically controlled valve is opened inside the second bracket. A buffer cover connected to the cooling channel is fixed in a triangular equidistant shape on the outside of the second bracket. An insulation head that is threadedly connected to the fine wire wax scraper head, the medium wire wax scraper head, and the coarse wire wax scraper head is embedded inside the buffer cover. A cooling port connected to the buffer cover is opened in the middle circumference of the insulation head.

[0015] As a preferred embodiment of the hot wax coating device and its operation method for enameled wire surface described in this invention, the unwinding assembly includes a small spur gear sleeved on another output shaft of a dual-head motor, and a first large spur gear and a second large spur gear are respectively driven by a synchronous belt on the outer side of the small spur gear. A release roller inserted into the release drum is longitudinally fixed on the first large spur gear, and a take-up roller inserted into the take-up drum is longitudinally fixed on the second large spur gear. Locking heads for positioning the release drum and the take-up drum are threadedly connected to the release roller and the take-up drum. An upper guide wheel is rotatably mounted on the top of the fixed frame via a support rod, and a lower guide wheel is rotatably mounted on the workstation frame via a support.

[0016] A device for hot wax coating of enameled wire surface and its operating method include the following steps: Step 1: According to the three specifications of fine, medium and coarse enameled wires, as shown in the figure, rotate and reposition the fine wire coating head, medium wire coating head and coarse wire coating head on the first bracket, as well as the fine wire wax scraping head, medium wire wax scraping head and coarse wire wax scraping head on the second bracket. Step 2: First, take the enameled wire to be coated with wax on the loose drum and pass it through the lower guide wheel into the fine wire coating head, medium wire coating head or coarse wire coating head that has been switched into place. Then, pass it through the upper guide wheel into the fine wire wax scraper head, medium wire wax scraper head or coarse wire wax scraper head that has been switched into place. Finally, pre-wind and rewind the wire by the take-up drum. Step 3: The first support performs waxing operations on the enameled wire that meets the specifications by switching to the fine wire coating head, medium wire coating head, or coarse wire coating head. The second support performs waxing operations on the enameled wire by switching to the fine wire wax scraping head, medium wire wax scraping head, or coarse wire wax scraping head.

[0017] The beneficial effects of this invention are as follows: Through the lifting component, adjusting component, and switching component, the waxing operation can be flexibly switched according to the different specifications of the incoming enameled wire, such as fine and ultra-fine, medium and coarse. Fine and ultra-fine specifications are coated by spraying, medium specifications by felt contact, and coarse specifications by mold dipping. This enables adaptive switching of waxing operation for different specifications of enameled wire, as well as vertical lifting dynamic waxing and scraping effects, with no need for replacement. The wax supply component and wax delivery component achieve quantitative wax supply to the enameled wire, and the cooling component and cooling delivery component achieve cooling and shaping effect on the wax coating of the enameled wire. It is self-sufficient on site and more convenient. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A front view of the device for hot wax coating of enameled wire and its operation method.

[0020] Figure 2 A partial front view of the device for hot wax coating of enameled wire and its operation method.

[0021] Figure 3 A side sectional view of the fixing frame, lifting assembly, adjusting assembly, and repositioning assembly of the device for hot wax coating of enameled wire surface and its operation method.

[0022] Figure 4An exploded view of the lifting and unwinding components of the device for applying hot wax coating to the surface of enameled wire and its operating method.

[0023] Figure 5 An exploded side view of the adjustment and repositioning components of the device for hot wax coating of enameled wire and its operation method.

[0024] Figure 6 A partial top-down exploded view of the adjustment and repositioning components of the device for hot wax coating of enameled wire and its operation method.

[0025] Figure 7 A partial exploded side section view of the adjustment and repositioning components of the device for hot wax coating of enameled wire and its operation method.

[0026] Figure 8 A side sectional view of the wax supply cylinder, wax supply assembly, wax delivery assembly, cooling cylinder, cooling assembly, and cooling delivery assembly of the device for hot wax coating of enameled wire and its operation method.

[0027] Figure 9 Device for hot wax coating of enameled wire surface and its operation method Figure 8 Enlarged view of the structure at point A in the middle.

[0028] In the diagram: 1. Workstation frame; 2. Fixing frame; 3. Unloading drum; 4. Rewind drum; 5. Enamelled wire; 61. Double-headed motor; 62. Reciprocating lead screw; 63. Lead screw sleeve; 64. Support arm ring frame; 65. Vertical through slot; 66. Protective cover; 67. Industrial camera; 71. Rack plate; 72. Electric actuator; 73. Shift gear; 74. First support; 75. Second support; 76. Angle sensor; 8. Ratchet; 9. Pawl; 10. Spring; 11. Angle motor; 121. Fine wire coating head; 122. Atomizing nozzle; 123. Centerline coating head; 124. High-density wear-resistant felt; 125. Coarse-line coating head; 126. Precision wax impregnation mold hole; 127. Fine-line wax scraper head; 128. Centerline wax scraper head; 129. Coarse-line wax scraper head; 13. Fine-line straightening head; 14. Centerline straightening head; 15. Coarse-line straightening head; 16. Wax supply cylinder; 171. Large bevel gear; 172. First small bevel gear; 173. First cam; 174. First connecting rod; 175. Wax supply piston; 176. First four-way valve; 177. Metering sensor; 18. Wax supply. 19. Suction head; 20. Liquid level sensor; 21. Wax storage tank; 22. Electric heating base; 23. Electric heating tube; 241. Wax discharge pipe; 242. First metal flexible hose; 243. First rotating head; 244. First connector; 245. Wax supply channel; 246. First electric control valve; 247. Flow chamber; 248. Through hole; 25. Cooling cylinder; 261. Second small bevel gear; 262. Second cam; 263. Second connecting rod; 264. Cooling piston; 265. Second four-way valve; 266. Temperature sensor 267. Cooling pipe; 268. Refrigerator; 271. Cooling exhaust pipe; 272. Second metal flexible hose; 273. Second rotating head; 274. Second connector; 275. Cooling supply passage; 276. Second electrically controlled valve; 277. Buffer cover; 278. Insulation head; 279. Cooling outlet; 281. Small spur gear; 282. Synchronous belt; 283. First large spur gear; 284. Second large spur gear; 285. Release roller; 286. Take-up roller; 287. Locking head; 29. ​​Upper guide roller; 30. Lower guide roller. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1, referring to Figures 1-9 This is the first embodiment of the present invention. This embodiment provides a hot wax coating device for enameled wire surface, including a fixed frame 2 surrounded by a work station frame 1, and an enameled wire 5 is unwound and wound by the unwinding drum 3 and the winding drum 4 of the unwinding assembly.

[0033] Specifically, the unwinding assembly includes a small spur gear 281 mounted on another output shaft of the dual-head motor 61, and the outer side of the small spur gear 281 is driven by a first large spur gear 283 and a second large spur gear 284 via a synchronous belt 282. The dual-head motor 61 drives the first large spur gear 283 and the second large spur gear 284 to rotate synchronously via the synchronous belt 282 on the small spur gear 281.

[0034] Because there is a differential speed ratio between the small spherical gear 281 and the first large spherical gear 283 and the second large spherical gear 284, the small spherical gear 281 drives the first large spherical gear 283 and the second large spherical gear 284 to move slowly, so as to avoid rotating too fast and causing the enameled wire 5 to break, and also to provide sufficient time for the waxing and scraping operations of the enameled wire 5.

[0035] A release roller 285, which is inserted into the release drum 3, is longitudinally fixed on the first large spur gear 283. The release roller 285 and the release drum 3, which rotate synchronously with the first large spur gear 283, feed the waxed enameled wire 5 at a low speed. A take-up roller 286, which is inserted into the take-up drum 4, is longitudinally fixed on the second large spur gear 284. The take-up roller 286 and the take-up drum 4, which rotate synchronously with the second large spur gear 284, feed the waxed enameled wire 5 at a low speed.

[0036] Furthermore, the release roller 285 and the take-up roller 286 are threadedly connected to locking heads 287 that are positioned with the release drum 3 and the take-up drum 4. The locking heads 287 facilitate quick disassembly and replacement of the release drum 3 and the take-up drum 4. The top of the fixed frame 2 is equipped with an upper guide wheel 29 that rotates via a support rod, and the work station frame 1 is equipped with a lower guide wheel 30 that rotates via a support. The upper and lower guide wheels 29 and the lower guide wheel 30 provide a guide transmission function for the enameled wire 5, forcing the waxing and scraping areas of the enameled wire 5 to remain vertical, which is beneficial for subsequent waxing and scraping operations.

[0037] Example 2, refer to Figures 1-9 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0038] Specifically, the adjustment and repositioning components on the lifting assembly apply repositioning waxing conditions to the enameled wires 5 of fine, medium, and coarse specifications through the fine wire coating head 121, the medium wire coating head 123, and the coarse wire coating head 125.

[0039] The lifting assembly includes a dual-head motor 61 embedded in the bottom of the fixed frame 2, and a reciprocating lead screw 62 that rotates with the fixed frame 2 is fixed to one output shaft of the dual-head motor 61 via a coupling. A lead screw sleeve 63 is threaded onto the reciprocating lead screw 62. The dual-head motor 61 intermittently drives the reciprocating lead screw 62 and the lead screw sleeve 63 to rotate, providing driving force for the rotational switching action of the fine wire coating head 121, the medium wire coating head 123, and the coarse wire coating head 125 according to the fine, medium, and coarse specifications of the enameled wire 5. The dual-head motor 61 continuously drives the reciprocating lead screw 62 and the lead screw sleeve 63 to rotate, providing driving force for the reciprocating lifting dynamic waxing and scraping action of the enameled wire 5 of fine, medium, and coarse specifications.

[0040] Furthermore, both sides of the lead screw sleeve 63 are fixed with support arm ring frames 64. The outer side of the fixed frame 2 is provided with a vertical through groove 65 that slides with the support arm ring frame 64. Through the vertical through groove 65, the support arm ring frame 64 in the reciprocating lifting motion plays a sliding limiting role, thereby improving the stability of its reciprocating motion.

[0041] Furthermore, a protective cover 66 is fixed to the outside of the support arm ring frame 64, and an industrial camera 67 for monitoring the wax coating of the enameled wire 5 is fixed obliquely to the outside of the two sets of protective covers 66. Through the two sets of industrial cameras 67, visual monitoring conditions are provided for the switching of the fine wire coating head 121, the medium wire coating head 123 and the coarse wire coating head 125 to ensure that they are switched in place.

[0042] Specifically, the adjustment assembly includes a rack plate 71 longitudinally embedded on the outside of the fixed frame 2, and an electric push rod 72 rotating inside the protective cover 66. Two electric push rods 72 are fixed with shift gears 73 that mesh with the rack plate 71 for adjustment. When it is necessary to switch the fine line coating head 121, the medium line coating head 123 and the coarse line coating head 125, as well as the fine line wax scraper head 127, the medium line wax scraper head 128 and the coarse line wax scraper head 129, the meshing stroke between the two sets of shift gears 73 and the rack plate 71 is adjusted to the correct position through the two electric push rods 72.

[0043] Furthermore, the number of teeth on the two sets of rack plates 71 corresponds to the number of teeth on the two sets of shift gears 73. That is to say, the fine wire coating head 121 and the fine wire wax scraping head 127 are located in the initial position. When the two sets of shift gears 73 mesh and move down to the middle section of the two sets of rack plates 71, the middle wire coating head 123 and the middle wire wax scraping head 128 switch to the waxing and scraping position of the enameled wire 5. When the two sets of shift gears 73 mesh and move down to the lower section of the two sets of rack plates 71, the coarse wire coating head 125 and the coarse wire wax scraping head 129 switch to the waxing and scraping position of the enameled wire 5.

[0044] Furthermore, the shift gear 73 is fixed with a first bracket 74 and a second bracket 75 respectively via concentric rods. The first bracket 74 is fixed to the fine line coating head 121, the medium line coating head 123 and the coarse line coating head 125 in a triangular equidistant shape. Angle sensors 76 are fixed on the two concentric rods. Through the two sets of angle sensors 76, angle monitoring conditions are provided for the shifting fine line coating head 121, the medium line coating head 123 and the coarse line coating head 125.

[0045] Since the fine wire coating head 121, the medium wire coating head 123, and the coarse wire coating head 125 are distributed in a triangular equidistant pattern with an included angle of 120° between them, the fine wire coating head 121, the medium wire coating head 123, and the coarse wire coating head 125 are switched at a 120° angle each time. The digital markings on the fine wire coating head 121, the medium wire coating head 123, the coarse wire coating head 125, the fine wire wax scraper head 127, the medium wire wax scraper head 128, and the coarse wire wax scraper head 129 are visually inspected by a person. With the visual sensing monitoring of two sets of industrial cameras 67 and angle sensors 76, it is ensured that they are accurately switched to the correct position according to the current enameled wire 5 specification type.

[0046] Ratchets 8 are mounted on the two electric push rods 72, and pawls 9 that rotate with the protective cover 66 are snapped onto the ratchet 8. Springs 10 that are fixed to the protective cover 66 are fixed to the outside of the two sets of pawls 9, and angle motors 11 are fixed to the outside of the pawls 9.

[0047] During the switching action, two sets of ratchet wheels 8 and pawls 9 provide reverse restraints on the first bracket 74 and the second bracket 75, and keep the first bracket 74 and the second bracket 75 in a stable and stationary state after switching to the position, so as to avoid shaking or tilting during waxing and scraping. During the reset action, two sets of angle motors 11 drive two sets of pawls 9 to disengage from two sets of ratchet wheels 8, release the reverse restraints on the first bracket 74 and the second bracket 75, and facilitate their upward reset.

[0048] Specifically, the transposition assembly includes an atomizing nozzle 122 circumferentially connected within the fine wire coating head 121, used for waxing fine and ultra-fine enameled wires 5; a high-density wear-resistant felt 124 is inserted into the medium wire coating head 123, used for waxing medium-sized enameled wires 5; and a precision wax-impregnation mold hole 126 is opened in the coarse wire coating head 125, used for waxing coarse-sized enameled wires 5.

[0049] When applying wax to enameled wires 5 of fine and ultra-fine specifications, a spraying method is used, that is: after the wax liquid is atomized, the enameled wire 5 passes vertically through the atomizing nozzle 122, and the wax liquid droplets are evenly sprayed onto its surface.

[0050] When applying wax to the enameled wire 5 of the center line specification, a felt contact method is adopted, that is: the wire passes through a high-density abrasion-resistant felt 124. The high-density abrasion-resistant felt 124 can be made of either wool or chemical fiber. The wax is applied by the capillary wetting and contact pressure of the high-density abrasion-resistant felt 124, which wraps around the center of the high-density abrasion-resistant felt 124 in a circumferential and uniform manner.

[0051] When applying wax to enameled wire 5 of coarse specifications, a mold dip coating method is adopted, that is, the enameled wire 5 is dipped vertically through the precision dip wax mold hole 126 for wax coating. All of the above adopts a reciprocating lifting wax coating action to achieve a uniform and comprehensive wax coating coverage effect for fine and ultra-fine, medium and coarse specifications of enameled wire 5.

[0052] Furthermore, the outer ends of the fine wire coating head 121, the medium wire coating head 123, and the coarse wire coating head 125 are respectively connected by threaded fine wire straightening head 13, medium wire straightening head 14, and coarse wire straightening head 15. Through the fine wire straightening head 13, the medium wire straightening head 14, and the coarse wire straightening head 15, the fine and ultra-fine, medium and coarse enameled wires 5 are pre-tightened and straightened by reciprocating lifting and lowering to avoid bending and affecting the coverage effect of the wax liquid.

[0053] The outer side of the second bracket 75 is equipped with a fine wire wax scraper head 127, a medium wire wax scraper head 128, and a coarse wire wax scraper head 129, which are used for wax scraping of fine, medium, and coarse enameled wires 5. The reciprocating lifting waxing action meets the dynamic wax scraping needs of fine and ultra-fine, medium and coarse enameled wires 5, and forces the currently covered wax to correspond to the thickness requirements of different specifications of enameled wires 5.

[0054] Example 3, referring to Figures 1-9 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0055] Specifically, the wax supply is provided by the wax supply assembly and the wax delivery assembly on the wax supply cylinder 16. The wax supply assembly includes a large bevel gear 171 sleeved on one output shaft of the double-headed motor 61, and a first small bevel gear 172 meshes with the outer side of the large bevel gear 171. A first cam 173 is fixed to the outer side of the first small bevel gear 172, and a first connecting rod 174 rotates to the outer side of the first cam 173. A wax supply piston 175 that slides and performs work with the wax supply cylinder 16 is hinged to the outer side of the first connecting rod 174. Through the reciprocating work of the wax supply piston 175, the wax on site is self-sufficiently supplied, and pressure is provided.

[0056] The top of the wax supply tank 16 is connected to a first four-way valve 176 with a metering sensor 177. The metering sensor 177 supplies wax in a metered manner. The top of the first four-way valve 176 is connected to a wax supply pipe 18 with a suction head 19. The bottom of the wax supply pipe 18 is connected to a wax storage tank 21 with a lid and a liquid level sensor 20. The liquid level sensor 20 monitors the wax level in real time so that the wax can be replenished in time.

[0057] The bottom of the wax storage tank 21 is covered with an electric heating base 22 with an electric heating tube 23. The electric heating base 22 and the electric heating tube 23 heat the wax liquid in the wax storage tank 21 in real time to ensure that the wax liquid in it remains in a molten and flowable state, and to avoid the wax liquid being too thick or solidifying, which would affect its fluidity and subsequent waxing state.

[0058] Specifically, the wax delivery assembly includes a wax discharge pipe 241 connected to the inner end of the first four-way valve 176, and a first metal hose 242 connected to the top end of the wax discharge pipe 241. A first rotating head 243 is connected to the first metal hose 242, and a first connecting head 244 that rotates with the first rotating head 243 is connected to the first bracket 74. The first rotating head 243 and the first connecting head 244 maintain a rotating and interconnected state. Through the first rotating head 243 and the first connecting head 244, the first metal hose 242 rotates in accordance with the stretching action of the first bracket 74, providing compensation for changes in the delivery stroke for the normal supply of wax.

[0059] Furthermore, the first bracket 74 is provided with a wax supply channel 245 controlled by a first electrically controlled valve 246. Through the first electrically controlled valve 246, the three sets of wax supply channels 245 are opened and closed adaptively according to the switching state of the fine wire coating head 121, the medium wire coating head 123 and the coarse wire coating head 125, so as to achieve precise wax supply to the current enameled wire 5.

[0060] The fine wire coating head 121, the medium wire coating head 123, and the coarse wire coating head 125 are all provided with a flow chamber 247 that communicates with the wax supply channel 245. The flow chamber 247 is provided with a through hole 248 for supplying wax to the atomizing nozzle 122, the high-density wear-resistant felt 124, and the precision wax impregnation mold hole 126. The through hole 248 located in the fine wire coating head 121 forces the pressurized wax liquid to be sprayed directly onto the fine and ultra-fine enameled wires 5 through the atomizing nozzle 122.

[0061] The through hole 248 located in the center line coating head 123 forces the pressurized wax liquid to be sprayed into the high-density wear-resistant felt 124, so that it is soaked in the wax liquid and then the medium-sized enameled wire 5 is coated with wax in contact.

[0062] The through hole 248 located in the coarse wire coating head 125 forces the pressurized wax liquid to be sprayed into the precision waxing mold hole 126, so as to apply high-speed wax to the coarse-gauge enameled wire 5 by means of immersion.

[0063] Example 4, refer to Figures 1-9 This is the fourth embodiment of the present invention, which is based on the first three embodiments.

[0064] The cooling cylinder 25 has a cooling assembly and a cooling delivery assembly that provide a shaped cooling air supply. The cooling assembly includes a second small bevel gear 261 meshing with the outer side of the large bevel gear 171, and a second cam 262 is fixed to the outer side of the second small bevel gear 261. A second connecting rod 263 rotates to the outer side of the second cam 262, and a cooling piston 264 that slides and performs work with the cooling cylinder 25 is hinged to the outer side of the second connecting rod 263. Through the reciprocating work of the cooling piston 264, the cooling air on site is self-sufficiently supplied with pressure.

[0065] Furthermore, the top of the cooling cylinder 25 is connected to a second four-way valve 265 with a temperature sensor 266. The temperature sensor 266 monitors the temperature of the supplied cold air in real time to ensure that the cold air meets the requirements for the solidification of the wax liquid. The top of the second four-way valve 265 is connected to a cold supply pipe 267, and the bottom of the cold supply pipe 267 is connected to a cooler 268 fixed to the fixing frame 2, which provides the cold air supply.

[0066] The cooling assembly includes a cooling exhaust pipe 271 connected to the inner end of the second four-way valve 265, and a second metal hose 272 connected to the top end of the cooling exhaust pipe 271. A second rotating head 273 is connected to the second metal hose 272, and a second connector 274 that rotates with the second rotating head 273 is connected to the second bracket 75. The second rotating head 273 and the second connector 274 maintain a rotating interconnected state, so that they rotate in accordance with the second metal hose 272 which is stretched by the second bracket 75, thereby providing compensation for changes in the delivery stroke for the normal supply of cooling air.

[0067] Furthermore, the second bracket 75 is equipped with a cooling channel 275 controlled by a second electric control valve 276. Through the second electric control valve 276, the three cooling channels 275 are opened and closed adaptively according to the switching status of the fine wire scraper head 127, the medium wire scraper head 128 and the coarse wire scraper head 129, so as to achieve precise cooling for the current enameled wire 5.

[0068] The outer side of the second bracket 75 is fixed with a buffer cover 277 that communicates with the cooling channel 275 in a triangular equidistant shape. The buffer cover 277 is used to treat the incoming cold air to prevent the cold air from becoming disordered. The buffer cover 277 is embedded with a heat preservation head 278 that is threadedly connected to the fine wire wax scraper head 127, the medium wire wax scraper head 128 and the coarse wire wax scraper head 129. The heat preservation head 278 is used to keep the incoming cold air warm, forcing the cold air to permanently shape the wax on the enameled wire 5 for a long time.

[0069] The insulation head 278 has a cooling port 279 in the middle circumference that communicates with the buffer cover 277. Through the circumferentially distributed cooling port 279, the cold air flowing in the buffer cover 277 can be supplied into the insulation head 278 to cool and shape the wax on the passing enameled wire 5, so as to avoid the wax from not adhering properly and causing breakage or peeling.

[0070] A device for hot wax coating of enameled wire surface and its operating method include the following steps: Step 1: Based on the fine, medium, and coarse specifications of the incoming enameled wire 5, first control the two electric push rods 72 to open synchronously, and drive the two sets of shifting gears 73 and their first brackets 74 and second brackets 75 to push forward until the two sets of shifting gears 73 mesh with the two rack plates 71. Then control the double-head motor 61 to turn forward and drive the screw sleeve 63 on the reciprocating screw 62 to move downward. The screw sleeve 63 drives the two support arm rings 64 to slide down in the vertical through groove 65, and simultaneously drives the two sets of protective covers 66 and their components to move down slowly as a whole.

[0071] Step Two: During this period, the two sets of protective covers 66, which move down synchronously, drive the two sets of shifting gears 73, which are in mesh with each other, to rotate in opposite directions along the two rack plates 71. Then, the two sets of shifting gears 73 rotating in opposite directions drive the first bracket 74 and the second bracket 75 on them to move accordingly. Figure 5 As shown, the fine line coating head 121, the medium line coating head 123, and the coarse line coating head 125 on the first support 74, and the fine line wax scraper head 127, the medium line wax scraper head 128, and the coarse line wax scraper head 129 on the second support 75 are rotated and repositioned one by one.

[0072] Step 3: In the rotational shift state, the two electric push rods 72 synchronously drive the two sets of ratchet wheels 8 to move accordingly, forcing the two pawls 9 to skip teeth on the two sets of ratchet wheels 8. The two springs 10 provide elastic support for the two pawls 9 that are skipping teeth. At this time, the two sets of angle motors 11 are in the initial unlocked state and do not interfere with the skipping teeth of the two pawls 9. Then, reverse limiting measures are applied to the first bracket 74 and the second bracket 75 on the two sets of shift gears 73, forcing the first bracket 74 and the second bracket 75 to remain in a stable position.

[0073] Step 4: When the two sets of shifting gears 73 reset upwards along the two rack plates 71, conversely, the two sets of angle motors 11 are simultaneously controlled to open, and the two pawls 9 are driven to disengage from the two sets of ratchet wheels 8, compressing the two springs 10, releasing the reverse limiting measures of the first bracket 74 and the second bracket 75, and controlling the double-head motor 61 to reverse and open, and reset upwards through the screw sleeve 63 on the reciprocating screw 62, until the two sets of protective covers 66 drive the two sets of shifting gears 73 whose reverse limiting measures have been released, and the whole set resets upwards, waiting for the specification switching operation of the next batch of enameled wire 5.

[0074] Step 5: After the fine wire coating head 121 and the fine wire wax scraper head 127 are switched into position simultaneously, waxing is performed on fine and ultra-fine enameled wires 5. After the medium wire wax scraper head 128 is switched into position simultaneously, waxing is performed on medium-sized enameled wires 5. After the coarse wire coating head 125 and the coarse wire wax scraper head 129 are switched into position simultaneously, waxing is performed on coarse-sized enameled wires 5. Throughout the process, two sets of angle sensors 76 monitor the rotation angle of the first support 74 and the second support 75 in real time. Two sets of industrial cameras 67 visually monitor the fine, medium, and coarse coating heads and wax scrapers that have been switched into position. After switching into position according to the current specifications of the enameled wire 5, the dual-head motor 61 is paused, and the two electric push rods 72 are closed simultaneously. The two sets of shift gears 73 are disengaged from the meshing parts of the two rack plates 71 and driven to the initial position.

[0075] Step Six: At this point, the enameled wire 5 to be coated with wax on the release drum 3 is passed through the lower guide roller 30 and into the fine wire coating head 121, medium wire coating head 123 or coarse wire coating head 125 that has been switched into position. Then, it passes through the upper guide roller 29 and into the fine wire wax scraper head 127, medium wire wax scraper head 128 or coarse wire wax scraper head 129 that has been switched into position. After being pre-wound and wound by the take-up drum 4, the dual-head motor 61 is continuously turned on, driving the small spherical gear 281, the reciprocating lead screw 62 and the large bevel gear 171 to rotate synchronously, ready for the waxing operation.

[0076] Step 7: The continuously rotating small spur gear 281 drives the first large spur gear 283 and the second large spur gear 284 to rotate via the synchronous belt 282. The first large spur gear 283 drives the release cylinder 3 on the release roller 285 to release the enameled wire 5 to be coated with wax. The second large spur gear 284 drives the take-up cylinder 4 on the take-up roller 286 to take up the enameled wire 5 after waxing. During this process, the two sets of locking heads 287 can be turned clockwise or counterclockwise to disassemble and replace the release cylinder 3 on the release roller 285 and the take-up cylinder 4 on the take-up roller 286.

[0077] Step 8: While the enameled wire 5 is being unwound, the continuously rotating reciprocating screw 62, through the two support arm rings 64 on the screw sleeve 63, drives the first bracket 74 on the two sets of protective covers 66 to switch into position the fine wire coating head 121, the medium wire coating head 123 or the coarse wire coating head 125, and the second bracket 75 to switch into position the fine wire wax scraper head 127, the medium wire wax scraper head 128 or the coarse wire wax scraper head 129, to perform vertical reciprocating lifting and lowering motion along the enameled wire 5 in the transmission state.

[0078] Step 9: During this period, the continuously rotating large bevel gear 171 drives the first cam 173 on the first small bevel gear 172 to move accordingly. The first cam 173 drives the wax supply piston 175 on the first connecting rod 174 to reciprocate in the wax supply cylinder 16. The wax liquid in the wax storage tank 21 is supplied to the wax discharge pipe 241 through the suction head 19 via the wax supply pipe 18 on the first four-way valve 176. The quantitative sensor 177 performs quantitative processing on the supplied wax liquid. At the same time, the electric heating tube 23 on the electric heating base 22 heats the wax liquid injected into the wax storage tank 21 to maintain it in a molten state. The liquid level sensor 20 monitors the liquid level of the wax liquid in the wax storage tank 21 in real time so that the lid can be opened to replenish the wax liquid in the wax storage tank 21.

[0079] Step 10: Quantitatively feed liquid wax into the wax discharge tube 241. The first metal flexible tube 242, which moves back and forth following the lifting and lowering motion of the first support 74, passes sequentially through the first rotating head 243 and the first connecting head 244, pressurizing and feeding it into the wax supply channel 245 within the first support 74. The first electric control valve 246 controls the opening of the channels of the fine-line coating head 121, the medium-line coating head 123, or the coarse-line coating head 125, while the other two sets of wax supply channels 245 are closed. The liquid wax then passes through the opened wax supply channel 245, sequentially through the flow chamber 247 and the through hole 248, correspondingly increasing the pressure... The atomizing nozzle 122 in the fine wire coating head 121, the high-density wear-resistant felt 124 in the medium wire coating head 123, or the precision wax-impregnation mold hole 126 in the coarse wire coating head 125 are pressurized and fed into the fine wire coating head 121. Then, in a reciprocating lifting state, dynamic waxing is performed on the enameled wires 5 of three different specifications: fine and ultra-fine, medium or coarse. During this period, the fine wire straightening head 13, medium wire straightening head 14 or coarse wire straightening head 15, which are switched to the position and follow the reciprocating lifting motion, straighten the enameled wires 5 of three different specifications of fine and ultra-fine, medium or coarse in the waxed state, and force them to fully contact and cover with the coated wax liquid.

[0080] Step 11: Simultaneously, the fine wire scraper 127, the medium wire scraper 128, or the coarse wire scraper 129 on the reciprocating lifting and lowering second bracket 75 dynamically scrapes the wax on the enameled wire 5 after waxing, forcing the wax thickness to meet the requirements. The continuously rotating large bevel gear 171 drives the second cam 262 on the second small bevel gear 261 to move accordingly. The second cam 262 drives the cooling piston 264 on the second connecting rod 263 to reciprocate in the cooling cylinder 25. The cooling pipe 267 on the second four-way valve 265 pressurizes the cold air generated by the refrigerator 268 and supplies it into the exhaust pipe 271. The temperature sensor 266 monitors the temperature of the cooling air in real time.

[0081] Step 12: The pressurized cold air supplied into the cooling pipe 271 is fed into the cooling channel 275 within the second support 75 by the second metal flexible hose 272, which moves back and forth following the lifting and lowering action of the second bracket 75. The hose passes through the second rotating head 273 and the second connecting head 274 in sequence. The second electric control valve 276 controls the opening of the channels of the fine wire wax scraper head 127, the medium wire wax scraper head 128, or the coarse wire wax scraper head 129, while the other two sets of cooling channels 275 are closed. The cold air is then supplied into the buffer cover 277 through the opened cooling channel 275 and into the insulation head 278 through the cold outlet 279. This cools and shapes the wax on the enameled wire 5 in the dynamic wax scraping state. The buffer cover 277 and the insulation head 278 keep the supplied cold air warm for a long time until the wax on the enameled wire 5 solidifies and shapes. Finally, the winding drum 4 winds the wire back up.

[0082] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An apparatus for surface hot wax coating of an enameled wire, characterized by: It includes a fixed frame (2) surrounded by a work station frame (1), and the unwinding and winding action of the enameled wire (5) is performed by the unwinding drum (3) and the winding drum (4) of the unwinding assembly. Then, the adjustment and repositioning components on the lifting assembly apply repositioning waxing conditions to the enameled wire (5) of fine, medium and coarse specifications through the fine wire coating head (121), the medium wire coating head (123) and the coarse wire coating head (125). The wax liquid is supplied through the wax supply component and the wax delivery component on the wax supply cylinder (16), and the cooling component and the cooling delivery component on the cooling cylinder (25) provide the shaping cold air supply.

2. The enameled wire surface hot wax coating apparatus as claimed in claim 1, wherein: The lifting assembly includes a double-headed motor (61) embedded in the bottom of the fixed frame (2), and a reciprocating screw (62) that rotates with the fixed frame (2) is fixed on one output shaft of the double-headed motor (61) via a coupling. A screw sleeve (63) is threaded onto the reciprocating screw (62). Both sides of the lead screw sleeve (63) are fixed with support arm ring frames (64). The outer side of the fixed frame (2) is provided with a vertical through groove (65) that slides with the support arm ring frame (64). The outer side of the support arm ring frame (64) is fixed with a protective cover (66). The outer side of the two sets of protective covers (66) is inclinedly fixed with an industrial camera (67) for monitoring the wax coating of the enameled wire (5).

3. The enameled wire surface hot wax coating apparatus as claimed in claim 2, wherein: The adjustment assembly includes a rack plate (71) longitudinally embedded on the outside of the fixed frame (2), and an electric push rod (72) rotatably inside the protective cover (66). The two electric push rods (72) are fixed with shift gears (73) that mesh with the rack plate (71) for adjustment. Furthermore, the shift gear (73) is fixed with a first bracket (74) and a second bracket (75) respectively via concentric rods. The first bracket (74) is fixed with the fine line coating head (121), the middle line coating head (123) and the coarse line coating head (125) in a triangular equidistant shape, and an angle sensor (76) is fixed on the two concentric rods. A ratchet (8) is fitted on the two electric push rods (72), and a pawl (9) that rotates with the protective cover (66) is fastened on the ratchet (8). A spring (10) that is fixed to the protective cover (66) is fixed on the outside of the two sets of pawls (9), and an angle motor (11) is fixed on the outside of the pawls (9).

4. The enameled wire surface hot wax coating apparatus as claimed in claim 3, wherein: The transposition assembly includes an atomizing nozzle (122) circumferentially connected within a fine wire coating head (121) for waxing fine and ultra-fine enameled wires (5), a high-density wear-resistant felt (124) inserted within a medium wire coating head (123) for waxing medium-sized enameled wires (5), and a precision wax-impregnation mold hole (126) opened within a coarse wire coating head (125) for waxing coarse-sized enameled wires (5). Furthermore, the outer ends of the fine line coating head (121), the medium line coating head (123), and the coarse line coating head (125) are connected by threads to the fine line straightening head (13), the medium line straightening head (14), and the coarse line straightening head (15). The second bracket (75) is provided with a fine wire wax scraper (127), a medium wire wax scraper (128) and a coarse wire wax scraper (129) on its outer side, and is used for wax scraping of fine, medium and coarse enameled wires (5).

5. The hot wax coating device for enameled wire surface as described in claim 2, characterized in that: The wax supply assembly includes a large bevel gear (171) sleeved on one output shaft of a double-headed motor (61), and a first small bevel gear (172) meshes with the outer side of the large bevel gear (171). A first cam (173) is fixed to the outer side of the first small bevel gear (172), and a first connecting rod (174) rotates to the outer side of the first cam (173). A wax supply piston (175) that slides and performs work with the wax supply cylinder (16) is hinged to the outer side of the first connecting rod (174). The top of the wax supply cylinder (16) is connected to a first four-way valve (176) with a quantitative sensor (177), the top of the first four-way valve (176) is connected to a wax supply pipe (18) with a suction head (19), and the bottom of the wax supply pipe (18) is connected to a wax storage tank (21) with a lid and a liquid level sensor (20). The bottom of the wax storage tank (21) is covered with an electric heating base (22) with an electric heating tube (23).

6. The enameled wire surface hot wax coating apparatus as claimed in claim 3 or 5, wherein: The wax delivery assembly includes a wax discharge pipe (241) connected to the inner end of the first four-way valve (176), and the top end of the wax discharge pipe (241) is connected to a first metal hose (242). A first rotating head (243) is connected to the first metal hose (242), and a first connector (244) that rotates with the first rotating head (243) is connected to the first bracket (74). The first rotating head (243) and the first connector (244) maintain a rotating and interconnected state with each other. The first bracket (74) is provided with a wax supply channel (245) controlled by the opening and closing of the first electric control valve (246). The fine line coating head (121), the middle line coating head (123) and the coarse line coating head (125) are provided with a flow chamber (247) in the annular shape that communicates with the wax supply channel (245). The flow chamber (247) is provided with a through hole (248) for supplying wax to the atomizing nozzle (122), the high-density wear-resistant felt (124) and the precision wax impregnation mold hole (126).

7. The enameled wire surface hot wax coating apparatus as claimed in claim 5, wherein: The cooling assembly includes a second small bevel gear (261) meshing with the outer side of the large bevel gear (171), and a second cam (262) is fixed to the outer side of the second small bevel gear (261). A second connecting rod (263) rotates to the outer side of the second cam (262), and a cooling piston (264) that slides and performs work with the cooling cylinder (25) is hinged to the outer side of the second connecting rod (263). The top of the cooling cylinder (25) is connected to a second four-way valve (265) with a temperature sensor (266), the top of the second four-way valve (265) is connected to a cooling pipe (267), and the bottom of the cooling pipe (267) is connected to a refrigerator (268) fixed to the bracket (2).

8. The apparatus for surface hot wax coating of enameled wire according to claim 3 or 7, wherein: The cooling assembly includes a cooling pipe (271) connected to the inner end of the second four-way valve (265), and the top end of the cooling pipe (271) is connected to a second metal hose (272). The second metal hose (272) is connected to a second rotating head (273), and the second bracket (75) is connected to a second connector (274) that rotates with the second rotating head (273). The second rotating head (273) and the second connector (274) maintain a rotating and interconnected state with each other. Furthermore, a cooling channel (275) with a second electric control valve (276) is provided inside the second bracket (75). A buffer cover (277) communicating with the cooling channel (275) is fixed on the outside of the second bracket (75) in a triangular equidistant shape. An insulation head (278) is embedded in the buffer cover (277) and is threadedly connected to the fine wire wax scraper head (127), the medium wire wax scraper head (128) and the coarse wire wax scraper head (129). A cooling outlet (279) communicating with the buffer cover (277) is provided on the circumference of the middle part of the insulation head (278).

9. The surface hot wax coating apparatus for enameled wire according to claim 2, wherein: The unwinding assembly includes a small spur gear (281) sleeved on another output shaft of the double-head motor (61), and the outer side of the small spur gear (281) is driven by a first large spur gear (283) and a second large spur gear (284) respectively via a synchronous belt (282). The first large spur gear (283) is longitudinally fixed with a unwinding roller (285) inserted into the unwinding drum (3), and the second large spur gear (284) is longitudinally fixed with a winding roller (286) inserted into the winding drum (4). The release roller (285) and the take-up roller (286) are threaded with locking heads (287) that are positioned with the release drum (3) and the take-up drum (4). The top of the fixed frame (2) is rotated by a support rod with an upper guide wheel (29), and the work station frame (1) is rotated by a support with a lower guide wheel (30).

10. A method of operating a surface hot wax coating apparatus for enameled wire as claimed in any one of the preceding claims 1 to 9, characterized in that: Includes the following steps: Step 1: According to the three specifications of fine, medium and coarse enameled wire (5) of the incoming material, as shown in Figure 5, rotate and reposition the fine wire coating head (121), medium wire coating head (123) and coarse wire coating head (125) on the first bracket (74), and the fine wire wax scraping head (127), medium wire wax scraping head (128) and coarse wire wax scraping head (129) on the second bracket (75) one by one. Step 2: First, take the enameled wire (5) to be coated with wax on the loose drum (3), pass it through the lower guide roller (30) into the fine wire coating head (121), medium wire coating head (123) or coarse wire coating head (125) that has been switched in place, and then pass it through the upper guide roller (29) into the fine wire wax scraping head (127), medium wire wax scraping head (128) or coarse wire wax scraping head (129) that has been switched in place, and then pre-wrap and wind it up by the take-up drum (4); Step 3: The first bracket (74) applies wax to the enameled wire (5) that meets the specifications by switching to the fine wire coating head (121), medium wire coating head (123) or coarse wire coating head (125), and the second bracket (75) applies wax to the enameled wire (5) by switching to the fine wire wax scraping head (127), medium wire wax scraping head (128) or coarse wire wax scraping head (129).

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