Coating device and method for rough drawing production of single crystal copper bonding wire

Abstract

The invention discloses a coating device and method for single crystal copper bonding wire rough drawing production, the device comprises a supply module, the supply module comprises a storage barrel and a feeding head with a one-way valve, the bottom of the storage barrel is provided with a discharging nozzle, and the discharging nozzle is internally provided with a material pumping assembly and a driving module; the driving module comprises a linkage assembly and two driven wheels, the two driven wheels are located on the two sides of the coarse raw material and tightly attached to the coarse raw material, and the linkage assembly is used for converting rotation of the driven wheels into reciprocating motion of the hollow extraction rod to provide power for the material extraction assembly. The driven wheel uses feeding movement of coarse raw materials as a power source, reciprocating driving force is provided for the material pumping assembly under the action of the linkage assembly, and the hollow pumping rod drives the sealing plug to reciprocate to pump out the lubricant in the storage barrel to the surfaces of the coarse raw materials so as to conduct fixed-distance and quantitative supply. And the lubricant is prevented from dropping into the working space due to excessive separation from the surface of the coarse raw material.

Description

Technical Field

[0001] The invention belongs to the technical field of bonding wire drawing production, and in particular relates to a coating device for rough drawing production of single crystal copper bonding wire, and a working method of the coating device for rough drawing production of single crystal copper bonding wire. Background Art

[0002] Single crystal copper bonding wire is a special wire used for precision welding or bonding in microelectronic packaging and connection. It is made of copper material with very high purity, and its crystal structure is single, that is, the entire wire is composed of a single crystal, rather than a collection of multiple crystal particles. In the reproduction process of single crystal copper bonding wire, the single crystal thick copper wire (about 10-20mm in diameter) becomes the single crystal thin copper wire (about 1-5mm in diameter) to be processed after the rough drawing process. After being coated with palladium in the immersion liquid, the single crystal thin copper wire continues to be multi-stage fine drawing. In the last drawing, the copper wire is accurately pulled to the required final size to complete the production of single crystal copper bonding wire (about 0.05-0.08mm in diameter).

[0003] Before the rough drawing production process of single crystal thick copper wire, in order to ensure smooth processing and protect the surface quality of the material, the use of lubricants is crucial to reduce friction, reduce drawing force, prevent mold wear and maintain the quality of the finished wire. In the existing technology, brushing and spraying are not suitable for finer materials. Usually, the surface of the single crystal thick copper wire is coated with lubricants by dipping. However, when the single crystal thick copper wire leaves the dipping device, part of the lubricant will be taken away from the dipping device. Excess lubricant will detach from the surface of the raw material and drip into the working space, causing pollution to the environment and increasing the difficulty of handling. In addition, too much lubricant may accumulate at the entrance of the mold, causing the mold aperture to become smaller or blocked, affecting the drawing of the single crystal thick copper wire. Summary of the invention

[0004] The present invention aims at the problem that when the single crystal thick copper wire using the dip coating method in the prior art leaves the dip coating device, part of the lubricant will be taken out of the dip coating device, and the excess lubricant will fall off the surface of the raw material and drip into the working space, causing pollution to the environment and increasing the difficulty of treatment. The present invention proposes the following technical solution:

[0005] Coating device for single crystal copper bonding wire rough drawing production, including:

[0006] A supply module, the supply module comprises a storage barrel and a feeding head with a one-way valve, a discharge nozzle is arranged at the bottom of the storage barrel, a material extraction assembly is arranged inside the discharge nozzle, the material extraction assembly comprises a hollow extraction rod reciprocating in the discharge nozzle, a hose connected to the feeding head is arranged at one end of the hollow extraction rod, a sealing plug is arranged at the other end of the hollow extraction rod, and an opening is arranged at the end of the hollow extraction rod;

[0007] A driving module, the driving module comprising a linkage assembly and two driven wheels, the two driven wheels being located on both sides of the raw material and closely fitting therewith, the linkage assembly being used to convert the rotation of the driven wheels into the reciprocating movement of the hollow extraction rod to provide power for the extraction assembly;

[0008] The crude raw material moves in the feed direction, driving the two driven wheels to rotate as the device switch. The linkage assembly converts the rotation of the driven wheel into the reciprocating movement of the hollow extraction rod. The hollow extraction rod drives the sealing plug to move toward the feeding head. The sealing plug squeezes the lubricant in the discharge nozzle through the opening into the hollow extraction rod. The lubricant moves with the movement of the sealing plug through the hose and the feeding head to the surface of the crude raw material.

[0009] As a preferred embodiment of the above technical solution, the linkage assembly includes a rotating shaft and a rack, a torsion spring is arranged on the surface of the rotating shaft, a deflection rod is arranged at one end of the rotating shaft, one end of the deflection rod extends into the driven wheel, a plurality of grooves are circumferentially opened in the middle part of the driven wheel, a torsion spring is arranged on the surface of the rotating shaft, a deflection gear is coaxially arranged at the other end of the rotating shaft, and the deflection gear is connected to the rack through a speed increasing gear.

[0010] As a preferred embodiment of the above technical solution, one end of the deflection rod is movably inserted in the groove, and a rolling block that fits the surface of the groove is rotatably inserted at the end of the deflection rod.

[0011] As a preferred embodiment of the above technical solution, there are two supply modules and two linkage components, the two supply modules are located on both sides of the crude raw material, and the two driven wheels provide power to the extraction components of the supply modules respectively through corresponding linkage components.

[0012] As a preferred embodiment of the above technical solution, the supply module also includes a coating assembly, which includes a limit frame and a rotating ring. The outer side of the rotating ring is rotatably inserted in the limit frame, a sponge block is provided on the inner side of the rotating ring, and a connecting rod is provided between one side of the rotating ring and the rack of the linkage assembly.

[0013] As a preferred embodiment of the above technical solution, it also includes: a mounting frame, which is fixedly connected to the discharge nozzle, and is used to install the limit frame, the linkage assembly, the discharge nozzle and the driven wheel.

[0014] As a preferred embodiment of the above technical solution, a soft anti-skid layer is provided at the place where the driven wheel contacts the surface of the raw material, and the surface of the anti-skid layer is concave-convex.

[0015] As a preferred embodiment of the above technical solution, the hose is bent in the middle, and both ends of the hose are fixedly connected to the hollow extraction rod and the feeding head respectively.

[0016] As a preferred embodiment of the above technical solution, the hose is arranged in a folded shape, and two ends of the hose are respectively fixedly connected to the hollow extraction rod and the feeding head.

[0017] The working method of the coating device for rough drawing production of single crystal copper bonding wire comprises the following steps:

[0018] S1, drives the driven wheel to rotate;

[0019] The raw material is pulled so that the friction force drives the two driven wheels to rotate. The driven wheels moving with the raw material convert the rotation into reciprocating motion through the linkage assembly as the driving force of the material extraction assembly;

[0020] S2, extract lubricant;

[0021] The hollow extraction rod drives the sealing plug to move toward the feeding head and enter the discharge nozzle. The internal space of the discharge nozzle gradually decreases and squeezes the lubricant through the opening into the hollow extraction rod.

[0022] S3, extrusion lubricant;

[0023] The lubricant is squeezed out to the surface of the raw material through the hose and the feed head as the sealing plug moves, and then the hollow extraction rod moves in the opposite direction to bring the sealing plug away from the discharge nozzle and into the storage barrel;

[0024] S4, replenish lubricant;

[0025] The lubricant in the storage barrel automatically flows into the discharge nozzle under the action of gravity for replenishment to carry out the next extraction work, and works or stops synchronously with the raw material.

[0026] The beneficial effects of the present invention are:

[0027] 1. The driven wheel uses the feeding movement of the raw material as the power source, and provides a reciprocating driving force for the extraction component through the action of the linkage component. The hollow extraction rod drives the sealing plug to move back and forth to extract the lubricant in the storage barrel to the surface of the raw material for fixed-distance and quantitative supply, so as to prevent excessive lubricant from detaching from the surface of the raw material and dripping into the working space. The driven wheel stops feeding synchronously with the stop of the raw material, so as to avoid waste of lubricant. At the same time, the appropriate lubricant will not accumulate at the entrance of the mold, so as to avoid affecting the mold, thereby ensuring the product quality of the single crystal copper wire after rough drawing;

[0028] 2. The linkage assembly can convert the rotation of the driven wheel into the reciprocating push of the hollow extraction rod, and increase the pushing stroke of the hollow extraction rod during the conversion process, so that the surface of the coarse raw material is fed multiple times during one rotation of the driven wheel to avoid the inability to complete the lubrication work due to insufficient raw materials;

[0029] 3. The coating component uses the linkage component as the power to make the reciprocating deflection sponge block move synchronously, smear the lubricant on the surface of the raw material so that it is evenly coated on the surface of the raw material, and the excess lubricant can be used to supplement the surface of the raw material without lubricant during the resetting process of the extraction component, thereby effectively avoiding the occurrence of missed areas and making the coating effect more uniform and ideal. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 What is shown is a schematic diagram of the overall structure of the embodiment;

[0031] Figure 2 What is shown is the installation position diagram of the material extraction component in the embodiment;

[0032] Figure 3 What is shown is the working state diagram of the material extraction component in the embodiment;

[0033] Figure 4 Shown is a diagram of the installation position of the linkage assembly in the embodiment;

[0034] Figure 5 What is shown is a working state diagram of the linkage component in the embodiment;

[0035] Figure 6 Shown is a diagram of the installation position of the coating assembly in the embodiment;

[0036] Figure 7 Shown is a pie and state diagram of the driven wheel in an embodiment.

[0037] In the figure: 11, storage barrel; 111, discharge nozzle; 12, feeding head; 13, extraction assembly; 131, hollow extraction rod; 132, opening; 133, hose; 134, sealing plug; 14, coating assembly; 141, limit frame; 142, rotating ring; 143, sponge block; 144, connecting rod; 21, driven wheel; 211, anti-skid layer; 22, linkage assembly; 221, rotating shaft; 222, rack; 223, deflection rod; 224, rolling block; 225, groove; 226, deflection gear; 227, speed increasing gear; 30, mounting frame. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0039] Figure 1-Figure 7 A coating device for rough drawing production of single crystal copper bonding wire, characterized in that it includes:

[0040] A supply module, the supply module includes a storage barrel 11 and a feeding head 12 with a one-way valve, the one-way valve of the feeding head 12 limits the lubricant to discharge only, a discharge nozzle 111 is provided at the bottom of the storage barrel 11, a pumping assembly 13 is provided inside the discharge nozzle 111, the pumping assembly 13 includes a hollow extraction rod 131 that reciprocates in the discharge nozzle 111, a hose 133 connected to the feeding head 12 is provided at one end of the hollow extraction rod 131, a sealing plug 134 is provided at the other end of the hollow extraction rod 131, and an opening 132 is provided at the end of the hollow extraction rod 131;

[0041] A driving module, the driving module comprising a linkage assembly 22 and two driven wheels 21, the two driven wheels 21 are located on both sides of the raw material and are closely fitted thereto, the linkage assembly 22 is used to convert the rotation of the driven wheel 21 into a reciprocating movement of the hollow extraction rod 131 to provide power for the extraction assembly 13;

[0042] The raw material moves in the feeding direction, driving the two driven wheels 21 to rotate as a device switch. The linkage assembly 22 converts the rotation of the driven wheel 21 into the reciprocating movement of the hollow extraction rod 131. The hollow extraction rod 131 drives the sealing plug 134 to move toward the feeding head 12. The sealing plug 134 squeezes the lubricant in the discharge nozzle 111 so that it enters into the hollow extraction rod 131 through the opening 132. The lubricant moves through the hose 133 and the feeding head 12 to the surface of the raw material as the sealing plug 134 moves.

[0043] There are two supply modules and two linkage components 22 . The two supply modules are located on both sides of the raw material. The two driven wheels 21 provide power to the extraction components of the supply modules through the corresponding linkage components 22 .

[0044] When the raw material is roughly drawn, the raw material is pulled so that the friction force pushes the two driven wheels 21 to rotate. As the raw material moves, the driven wheels 21 convert the rotation into reciprocating motion through the linkage assembly 22 as the driving force of the extraction assembly 13. The hollow extraction rod 131 drives the sealing plug 134 to move toward the feeding head 12 and enter the discharge nozzle 111. The internal space of the discharge nozzle 111 gradually decreases and squeezes the lubricant through the opening 132 and enters the hollow extraction rod 131. As the sealing plug 134 moves, the lubricant passes through the hose 133 and the feeding head 12 and is squeezed onto the surface of the raw material. Then, the hollow extraction rod 131 moves in the opposite direction to bring the sealing plug 134 away from the discharge nozzle 111 and into the storage barrel 11. The lubricant in the storage barrel 11 automatically flows into the discharge nozzle 111 under the action of gravity for replenishment so as to carry out the next extraction work.

[0045] The driven wheel 21 uses the feeding movement of the raw material as a power source, and provides a reciprocating driving force for the extraction component 13 through the action of the linkage component 22. The hollow extraction rod 131 drives the sealing plug 134 to move back and forth to extract the lubricant in the storage barrel 11 to the surface of the raw material for fixed-distance and quantitative supply, thereby preventing excessive lubricant from escaping from the surface of the raw material and dripping into the working space. The driven wheel 21 stops feeding synchronously with the cessation of the raw material to avoid wasting lubricant. At the same time, suitable lubricant will not accumulate at the mold entrance to avoid affecting the mold, thereby ensuring the product quality of the single crystal thick copper wire after rough drawing.

[0046] The working method of the coating device for rough drawing production of single crystal copper bonding wire comprises the following steps:

[0047] S1, driving the driven wheel 21 to rotate;

[0048] The raw material is pulled so that the friction force drives the two driven wheels 21 to rotate. The driven wheels 21 that move with the raw material convert the rotation into reciprocating motion through the linkage assembly 22 as the driving force of the material extraction assembly 13;

[0049] S2, extract lubricant;

[0050] The hollow extraction rod 131 drives the sealing plug 134 to move toward the feeding head 12 and enter the discharge nozzle 111. The internal space of the discharge nozzle 111 gradually decreases and squeezes the lubricant to pass through the opening 132 and enter the hollow extraction rod 131.

[0051] S3, extrusion lubricant;

[0052] The lubricant is squeezed out onto the surface of the raw material through the hose 133 and the feed head 12 as the sealing plug 134 moves, and then the hollow extraction rod 131 moves in the opposite direction to bring the sealing plug 134 away from the discharge nozzle 111 and into the storage barrel 11;

[0053] S4, replenish lubricant;

[0054] The lubricant in the storage barrel 11 automatically flows into the discharge nozzle 111 under the action of gravity to be replenished for the next extraction operation, and works or stops synchronously with the raw material.

[0055] Figure 2-Figure 6In the embodiment, the linkage assembly 22 includes a rotating shaft 221 and a rack 222, a torsion spring is arranged on the surface of the rotating shaft 221, and both ends of the torsion spring are fixedly connected to the rotating shaft 221 and the mounting frame 30 respectively, a deflection rod 223 is arranged at one end of the rotating shaft 221, and one end of the deflection rod 223 extends into the driven wheel 21, and a plurality of grooves 225 are circumferentially opened in the middle part of the driven wheel 21, a torsion spring is arranged on the surface of the rotating shaft 221, and a deflection gear 226 is coaxially arranged at the other end of the rotating shaft 221, and the deflection gear 226 is connected to the rack 222 through a speed-increasing gear 227, and the diameter of the deflection gear 226 is 6-10 times the diameter of the speed-increasing gear 227.

[0056] One end of the deflection rod 223 is movably inserted in the groove 225 , and a rolling block 224 and a deflection gear 226 that are in contact with the surface of the groove 225 are rotatably inserted into the end of the deflection rod 223 .

[0057] When the driven wheel 21 rotates, the rolling block 224 at the end of the deflection rod 223 rolls on the surface of the groove 225, and the deflection rod 223 is lifted and deflected around the rotating shaft 221, twisting and deforming the torsion spring. The deflection gear 226 drives the speed increase gear 227 to rotate rapidly with the rotation of the rotating shaft 221, and the rack 222 moves toward the storage barrel 11, and the hollow extraction rod 131 and the sealing plug 134 move. After the sealing plug 134 leaves the discharge nozzle 111, the preparation is completed. When the deflection rod 223 leaves the current groove 225 and enters the lower groove 225, the twisted and deformed torsion spring drives the rotating shaft 221 and the deflection rod 223 to quickly reset, and the rolling block 224 then enters the bottom of the groove 225 and fits with its surface, and the deflection gear 226 also quickly resets and retracts the rack 222, and the hollow extraction rod 131 can drive the sealing plug 134 to move toward the feeding head 12, and the sealing plug 134 enters the discharge nozzle 111 to complete the extraction work.

[0058] The linkage assembly 22 is capable of converting the rotation of the driven wheel 21 into a reciprocating push of the hollow extraction rod 131, and increasing the pushing stroke of the hollow extraction rod 131 during the conversion process, so that during one rotation of the driven wheel 21, the surface of the coarse raw material is fed multiple times to avoid insufficient raw material to complete the lubrication work.

[0059] Figure 1 and Figure 6 In the embodiment, the supply module also includes a coating component 14, which includes a limit frame 141 and a rotating ring 142. The outer side of the rotating ring 142 is rotatably inserted into the limit frame 141, a sponge block 143 is arranged on the inner side of the rotating ring 142, and a connecting rod 144 is arranged between one side of the rotating ring 142 and the rack 222 of the linkage component 22.

[0060] When the rack 222 moves back and forth, the connecting rod 144 pushes the rotating ring 142 to deflect back and forth in the limiting frame 141, and the sponge block 143 applies the lubricant on the surface of the raw material so that it is evenly coated on the surface of the raw material.

[0061] The coating component 14 uses the linkage component 22 as power to make the reciprocating deflection sponge block 143 move synchronously, smear the lubricant on the surface of the raw material so that it is evenly coated on the surface of the raw material, and the excess lubricant can be used to replenish the surface of the raw material without lubricant during the resetting process of the extraction component 13, thereby effectively avoiding the occurrence of missed areas and making the coating effect more uniform and ideal.

[0062] Figure 1 The device further includes: a mounting frame 30, which is fixedly connected to the discharge nozzle 111, and is used to install the limiting frame 141, the linkage assembly 22, the discharge nozzle 111 and the driven wheel 21.

[0063] The mounting frame 30 can be used to mount the limiting frame 141, the linkage assembly 22, the discharge nozzle 111 and the driven wheel 21, so as to ensure the stability of the device during operation and prevent a certain component from moving and failing to complete the feeding operation.

[0064] Figure 7 In the embodiment, a soft anti-skid layer 211 is provided at the place where the driven wheel 21 contacts the surface of the raw material, and the surface of the anti-skid layer 211 is arranged in a concave-convex shape.

[0065] The driven wheels 21 on both sides are squeezed toward the middle through the anti-skid layer 211, and the anti-skid layer 211 is deformed and increases the friction between the driven wheels 21, ensuring that the coarse raw material drives the driven wheels 21 on both sides to rotate during the feeding process.

[0066] Figure 1 In the embodiment, the hose 133 is bent in the middle, and both ends of the hose 133 are fixedly connected to the hollow extraction rod 131 and the feed head 12 respectively.

[0067] The curved hose 133 can maintain the connection between the hollow extraction rod 131 and the feed head 12, and the distance between the two remains unchanged, thereby ensuring the normal supply of lubricant.

[0068] Figure 1 In the embodiment, the hose 133 is arranged in a folded shape, and both ends of the hose 133 are fixedly connected to the hollow extraction rod 131 and the feeding head 12 respectively.

[0069] The folded hose 133 can maintain the connection between the hollow extraction rod 131 and the feeding head 12, and the hose 133 will fold and expand and contract as the hollow extraction rod 131 moves, which will lead to the concentrated supply of lubricating fluid to a small area, but will reduce the working pressure of the feeding head 12 and extend the service life of the feeding head 12.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. A coating device for rough drawing production of single crystal copper bonding wire, characterized in that: include: A supply module, the supply module comprising a storage barrel (11) and a feeding head (12) with a one-way valve, the storage barrel (11) being provided with a discharge nozzle (111) at the bottom, the discharge nozzle (111) being provided with a material extraction assembly (13), the material extraction assembly (13) comprising a hollow extraction rod (131) reciprocating in the discharge nozzle (111), one end of the hollow extraction rod (131) being provided with a hose (133) connected to the feeding head (12), the other end of the hollow extraction rod (131) being provided with a sealing plug (134), and the end of the hollow extraction rod (131) being provided with an opening (132); A driving module, the driving module comprising a linkage assembly (22) and two driven wheels (21), the two driven wheels (21) being located on both sides of the raw material and closely fitting therewith, the linkage assembly (22) being used for converting the rotation of the driven wheels (21) into the reciprocating movement of the hollow extraction rod (131) to provide power for the extraction assembly (13); The raw material moves in the feeding direction, driving the two driven wheels (21) to rotate as a device switch. The linkage component (22) converts the rotation of the driven wheel (21) into the reciprocating movement of the hollow extraction rod (131). The hollow extraction rod (131) drives the sealing plug (134) to move toward the feeding head (12). The sealing plug (134) squeezes the lubricant in the discharge nozzle (111) through the opening (132) and enters the hollow extraction rod (131). The lubricant moves through the hose (133) and the feeding head (12) to the surface of the raw material as the sealing plug (134) moves.

2. The coating device for rough drawing production of single crystal copper bonding wire according to claim 1, characterized in that: The linkage assembly (22) comprises a rotating shaft (221) and a rack (222); a torsion spring is arranged on the surface of the rotating shaft (221); a deflection rod (223) is arranged at one end of the rotating shaft (221); one end of the deflection rod (223) extends into the driven wheel (21); a plurality of grooves (225) are circumferentially provided in the middle of the driven wheel (21); a torsion spring is arranged on the surface of the rotating shaft (221); a deflection gear (226) is coaxially arranged at the other end of the rotating shaft (221); and the deflection gear (226) is connected to the rack (222) via a speed increasing gear (227).

3. The coating device for rough drawing production of single crystal copper bonding wire according to claim 2, characterized in that: One end of the deflection rod (223) is movably inserted into the groove (225), and a rolling block (224) that fits the surface of the groove (225) is rotatably inserted into the end of the deflection rod (223).

4. The coating device for rough drawing production of single crystal copper bonding wire according to claim 1, characterized in that: The number of the supply modules and linkage components (22) is two, and the two supply modules are located on both sides of the raw material. The two driven wheels (21) respectively provide power to the extraction components of the supply modules through the corresponding linkage components (22).

5. The coating device for rough drawing production of single crystal copper bonding wire according to claim 2, characterized in that: The supply module further comprises a coating assembly (14), wherein the coating assembly (14) comprises a limiting frame (141) and a rotating ring (142), wherein the outer side of the rotating ring (142) is rotatably inserted into the limiting frame (141), a sponge block (143) is arranged on the inner side of the rotating ring (142), and a connecting rod (144) is arranged between one side of the rotating ring (142) and the rack (222) of the linkage assembly (22).

6. The coating device for rough drawing production of single crystal copper bonding wire according to claim 5, characterized in that: Also includes: A mounting frame (30) is fixedly connected to the discharge nozzle (111), and the mounting frame (30) is used to install the limiting frame (141), the linkage assembly (22), the discharge nozzle (111) and the driven wheel (21).

7. The coating device for rough drawing production of single crystal copper bonding wire according to claim 1, characterized in that: A soft anti-skid layer (211) is provided at the position where the driven wheel (21) contacts the surface of the raw material, and the surface of the anti-skid layer (211) is arranged in a concave-convex shape.

8. The coating device for rough drawing production of single crystal copper bonding wire according to claim 1, characterized in that: The hose (133) is bent in the middle, and both ends of the hose (133) are fixedly connected to the hollow extraction rod (131) and the feed head (12) respectively.

9. The coating device for rough drawing production of single crystal copper bonding wire according to claim 1, characterized in that: The hose (133) is arranged in a folded shape, and the two ends of the hose (133) are respectively fixedly connected to the hollow extraction rod (131) and the feeding head (12).

10. The working method of the coating device for single crystal copper bonding wire rough drawing production according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, driving the driven wheel (21) to rotate; The raw material is pulled so that the friction force drives two driven wheels (21) to rotate, and the driven wheels (21) that move with the raw material convert the rotation into reciprocating movement through the linkage assembly (22) as the driving force of the material extraction assembly (13); S2, extract lubricant; The hollow extraction rod (131) drives the sealing plug (134) to move toward the feeding head (12) and enter the discharge nozzle (111), and the internal space of the discharge nozzle (111) gradually decreases and squeezes the lubricant to pass through the opening (132) and enter the hollow extraction rod (131); S3, extrusion lubricant; The lubricant is squeezed out onto the surface of the raw material through the hose (133) and the feed head (12) as the sealing plug (134) moves, and then the hollow extraction rod (131) moves in the opposite direction to bring the sealing plug (134) away from the discharge nozzle (111) and into the storage barrel (11); S4, replenish lubricant; The lubricant in the storage barrel (11) automatically flows into the discharge nozzle (111) under the action of gravity to be replenished for the next extraction operation, and works or stops synchronously with the raw material.

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