A die casting machine nozzle and a production process thereof

Abstract

The application relates to a die casting machine nozzle sleeve, which comprises a nozzle sleeve body, an inlet port is arranged at the front end of the nozzle sleeve body, and an injection runner is arranged in the nozzle sleeve body and is in a hollow cylindrical shape, and the injection runner is used for guiding raw materials entering the inlet port to be discharged. The application also provides a production process of the die casting machine nozzle sleeve, which can clamp and fix the nozzle sleeve body through a limiting mechanism, polish the inlet port arranged at the front end of the nozzle sleeve body through a polishing mechanism in cooperation with an adjusting mechanism, and achieve the purposes of avoiding damage of the inlet port caused by uneven stress during polishing, making the polishing device more suitable for different types of nozzle sleeve bodies, and making the polishing of the inlet port of the nozzle sleeve body more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of sprue sleeve processing, in particular to a sprue sleeve for a die-casting machine and a production process thereof. Background Art

[0002] The sprue bushing is a crucial component of the die-casting machine. It forms the sprue, ensuring smooth injection punch movement and ensuring stable pressure transfer and filling of the raw material. The inlet port of the sprue bushing must be smooth and flat, but existing polishing devices suffer from numerous drawbacks. The polishing heads of these devices are incompatible with different sprue bushing models. This mismatch can easily cause uneven force on the inlet port during polishing, leading to damage and the need for frequent head replacement. Furthermore, existing polishing devices lack effective clamping and fixation of the sprue bushing during processing, impacting product quality.

[0003] A Chinese utility model patent with publication number CN217317504U discloses a sprue sleeve gate polishing device, which solves the problem that the sprue sleeve gate is not convenient to be clamped and positioned better during the existing polishing process, resulting in inconvenience in performing polishing operations. The device includes a base, a support plate is installed on the top of the base, a polishing motor is installed on one side of the support plate, the output shaft of the polishing motor passes through the support plate and extends to the side of the support plate away from the polishing motor, a rotating rod is installed on the output shaft of the polishing motor, a polishing wheel is installed on the end of the rotating rod away from the output shaft of the polishing motor, a movable plate is installed on the top of the base and on the side of the polishing wheel away from the support plate, and a clamping and positioning mechanism is installed on the movable plate.

[0004] Although the clamping and positioning mechanism can achieve a basic fixing effect on the gate sleeve during processing, the polishing wheel in the polishing device is still not adaptable to different models, and the workpiece may still be damaged during polishing. Summary of the Invention

[0005] The purpose of the present invention is to provide a gate sleeve for a die-casting machine in view of the deficiencies in the prior art.

[0006] The technical solutions of the present invention are as follows:

[0007] A die-casting machine sprue sleeve comprises a sprue sleeve body, wherein the front end of the sprue sleeve body is provided with an inlet port, the interior of the sprue sleeve body is provided with an injection channel, the injection channel is in a hollow cylindrical shape, and is used to guide the raw material entering the inlet port.

[0008] The present invention also provides a production process for a sprue sleeve of a die-casting machine, which can clamp and fix the sprue sleeve body through a limiting mechanism, and polish the inlet port opened at the front end of the sprue sleeve body through a grinding mechanism and an adjusting mechanism, so as to avoid damage to the inlet port due to uneven force during polishing, and the polishing device has a wider range of applications and can adapt to different models of sprue sleeve bodies, and the inlet port of the sprue sleeve body is polished more evenly.

[0009] A production process for a sprue sleeve of a die-casting machine comprises the following steps:

[0010] Step 1: Turning and milling: Turn and mill the gate sleeve body;

[0011] Step 2: Nitriding: Nitriding the entire gate sleeve body after turning and milling;

[0012] Step 3: polishing: polishing the inlet port of the nitrided sprue bushing body through a polishing device;

[0013] Step 4: coating, coating the polished surface of the sprue sleeve body to obtain the product.

[0014] As a preference, the polishing device in step three includes a processing table and a limiting mechanism and a grinding mechanism slidably arranged on the processing table, and an adjusting mechanism is arranged between the limiting mechanism and the grinding mechanism.

[0015] As a preferred embodiment, a slide rail a and a slide rail b are provided on the processing table.

[0016] As a preferred embodiment, the limiting mechanism includes a base a slidingly arranged in the slide rail a, a servo motor a fixedly arranged on the base a, and a mounting plate fixedly connected to the front end of the servo motor a with the servo motor a, and the mounting plate is provided with a slide groove a and a slide groove b, and a limiting block a is provided at the bottom of the base a corresponding to the slide rail a.

[0017] As a preferred embodiment, a slider a is slidably provided in the slide groove a, a connecting rod a is fixedly connected to the slider a, an arc-shaped splint a is fixedly connected to the front end of the connecting rod a, protrusions a are fixedly connected to both ends of the arc-shaped splint a, a through hole is provided on the protrusion a, and a handle is fixedly connected to one side of the arc-shaped splint a.

[0018] As a preferred embodiment, a slider b is slidingly provided in the slide groove b, a connecting rod b is fixedly connected to the slider b, an arc-shaped splint b is fixedly connected to the front end of the connecting rod b, protrusions b are fixedly connected to both ends of the arc-shaped splint b, a support rod is provided with a corresponding through hole on the protrusion b, a spring a is provided on the outer ring of the support rod, and a fastening nut is provided at the front end of the support rod.

[0019] As a preferred embodiment, the grinding mechanism includes a base b slidingly arranged in the slide rail b, a servo motor b fixedly arranged on the base b, and a grinding rod fixedly connected to the front end of the servo motor b. A grinding head is fixedly arranged at the front end of the grinding rod, and a limiting block b is fixedly connected to the bottom of the base b corresponding to the slide rail b, and a spring b235 is arranged at the tail end of the base b230.

[0020] As a preference, the adjustment mechanism includes a cylinder fixedly arranged on one side of the base a, a connecting block fixedly arranged on the front end of the cylinder, and one end of the connecting block is fixedly connected to the base a.

[0021] As another preferred embodiment, the adjustment mechanism also includes a sliding seat fixedly arranged between base a and base b and a guide block fixedly arranged on base a, a sliding rod is slidably arranged on the sliding seat, one end of the sliding rod is fixedly connected to a convex ball, a ferrule is hinged on the outside of the convex ball, and the other end of the ferrule is fixedly connected to the base b.

[0022] The beneficial effects of the present invention are

[0023] The present invention is provided with an adjusting mechanism, and the cylinder in the adjusting mechanism drives the base a in the limiting mechanism to move left and right, so that the guide block arranged on the base a pushes the slide rod when following the movement of the base a, so that the slide rod pushes the base b in the polishing mechanism to move back and forth, so that the polishing head in the polishing mechanism can polish different parts of the inlet port of the gate sleeve body, making the polishing more uniform, and as the adjusting mechanism drives the limiting mechanism and the gate sleeve body clamped by the limiting mechanism to move left and right, the polishing mechanism can move back and forth synchronously under the action of the adjusting mechanism, thereby avoiding interference during polishing and improving the processing quality.

[0024] The present invention is provided with a polishing mechanism, and the polishing head in the polishing mechanism is set to a smaller spherical shape. In conjunction with the adjustment mechanism, the polishing mechanism can polish the inlet port of the gate sleeve body more evenly, and will not cause uneven force in the inlet port during polishing due to mismatch of the polishing head, causing damage to the gate sleeve body, so that the polishing device has a wider applicability and can polish and grind different types of gate sleeve bodies.

[0025] The present invention is provided with a limiting mechanism, and the gate sleeve body is clamped and fixed by the arc-shaped clamping plate a and the arc-shaped clamping plate b in the limiting mechanism. At the same time, the arc-shaped clamping plate a and the arc-shaped clamping plate b are respectively slidably arranged on the mounting plate through the slide groove a and the slide groove b, and can move synchronously when the adjustment mechanism drives the base a to move, thereby ensuring the continuous and effective clamping and fixing of the gate sleeve body, avoiding the gate sleeve body from loosening during the processing, ensuring the processing quality, and making the inlet port of the gate sleeve body fit better with the grinding head.

[0026] In summary, the present invention has the advantages of more uniform polishing, wide applicability of the polishing device, better processing quality, good linkage effect between components, simple structure, etc., and is suitable for the field of gate sleeve processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 It is a structural schematic diagram of the polishing device;

[0029] Figure 2 It is a structural diagram of the limiting mechanism;

[0030] Figure 3 for Figure 2 A magnified schematic diagram of point A;

[0031] Figure 4 This is a schematic diagram of the state when the adjustment mechanism drives the limiting mechanism and the grinding mechanism to move;

[0032] Figure 5 It is a process flow chart.

[0033] Figure: sprue bushing body 1, polishing device 2, inlet port 11, injection channel 12, processing table 21, limit mechanism 22, grinding mechanism 23, adjustment mechanism 24, slide rail a210, slide rail b211, base a220, servo motor a221, mounting plate 222, slide groove a223, slide groove b224, limit block a225, slider a226, connecting rod a227, arc splint a228, protrusion a229, through hole 2210, handle 2211, slider b2212, connecting rod b2213, arc-shaped splint b2214, protrusion b2215, support rod 2216, spring a2217, fastening nut 2218, base b230, servo motor b231, grinding rod 232, grinding head 233, limit block b234, spring b235, cylinder 240, connecting block 241, sliding seat 242, guide block 243, sliding rod 244, protruding ball 245, and sleeve 246. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings. Example 1

[0035] like Figures 1 to 5 As shown, a die-casting machine sprue bushing includes a sprue bushing body 1, an inlet port 11 is defined at the front end of the sprue bushing body 1, and an injection channel 12 is defined within the sprue bushing body 1. The injection channel 12 is hollow and cylindrical and is used to guide the raw material entering the inlet port 11. The raw material enters the injection channel 12 from the inlet port 11 and is injected into the mold.

[0036] like Figure 5 As shown, a production process for a sprue sleeve of a die-casting machine includes the following steps:

[0037] Step 1: Milling and turning: milling the sprue sleeve body 1; milling and cutting the sprue sleeve body 1 by a milling machine to improve the surface precision of the sprue sleeve body 1.

[0038] Step 2: Nitriding: The entire sprue sleeve body 1 after turning and milling is subjected to nitriding treatment; the entire sprue sleeve body 1 is desalinated by a nitriding treatment device to increase its wear resistance, surface hardness, fatigue limit, high temperature resistance and corrosion resistance.

[0039] Step 3: Polishing: The inlet port 11 of the nitrided sprue bushing body 1 is polished and ground using the polishing device 2. The sprue bushing body 1 is clamped and fixed by the limiting mechanism 22, and the inlet port 11 opened at the front end of the sprue bushing body 1 is polished by the polishing mechanism 23 in cooperation with the adjustment mechanism 23. This prevents damage to the inlet port 11 due to uneven force during polishing, makes the polishing device 2 more applicable to different models of sprue bushing bodies 1, and polishes the inlet port 11 of the sprue bushing body 1 more evenly.

[0040] Step 4: Coating the polished surface of the sprue bushing body 1 to obtain the product. The polished surface of the sprue bushing body 1 is coated by a coating process, so that the surface of the sprue bushing body 1 has a certain thickness of protective layer, thereby playing a protective role and further improving the wear resistance, high temperature resistance, and anti-fouling properties of the sprue bushing body 1.

[0041] like Figure 1 As shown, the polishing device 2 in step 3 includes a processing table 21 and a limiting mechanism 22 and a grinding mechanism 23 slidably arranged on the processing table 21. An adjustment mechanism 24 is provided between the limiting mechanism 22 and the grinding mechanism 23. The sprue bushing body 1 is clamped and fixed by the limiting mechanism 22, and the inlet port 11 opened at the front end of the sprue bushing body 1 is polished by the grinding mechanism 23 in cooperation with the adjustment mechanism 23 to prevent damage to the inlet port 11 due to uneven force during polishing. The polishing device 2 has a wider range of applications and can adapt to different models of sprue bushing bodies 1, and the inlet port 11 of the sprue bushing body 1 is polished more evenly.

[0042] like Figure 1 As shown, a slide rail a210 and a slide rail b211 are provided on the processing table 21. The slide rail a210 supports the base a220 and enables the base a220 to move smoothly along the slide rail a210 driven by the cylinder 240. The slide rail b211 supports the base b230 and enables the base b230 to move smoothly along the slide rail b211 driven by the slide rod 244.

[0043] like Figure 2 and Figure 4 As shown, the limiting mechanism 22 includes a base a220 slidably set in the slide rail a210, a servo motor a221 fixedly set on the base a220, and a mounting plate 222 fixedly connected to the front end of the servo motor a221 with the servo motor a221, and a slide groove a223 and a slide groove b224 are provided on the mounting plate 222. A limiting block a225 is provided at the bottom of the base a220 corresponding to the slide rail a210. The mounting plate 222 and the arc-shaped splint a228 and the arc-shaped splint b2214 slidingly arranged on the mounting plate 222 are driven to rotate by the servo motor a221. The rotation directions of the servo motor a221 and the servo motor b231 are both set to clockwise, so that when the grinding head 233 driven by the servo motor b231 grinds the sprue sleeve body 1 clamped and fixed by the arc-shaped splint a228 and the arc-shaped splint b2214, the inlet port 11 at the front end of the sprue sleeve body 1 and the grinding head 233 can rotate in opposite directions, which can further improve the efficiency of polishing and improve the polishing finish; the limit block a225 is embedded in the slide rail a210 so that the base a220 will not deviate and tilt when it moves.

[0044] like Figure 2 、 Figure 3 and Figure 4 As shown, a slider a226 is slidingly provided in the slide groove a223, a connecting rod a227 is fixedly connected to the slider a226, an arc-shaped splint a228 is fixedly connected to the front end of the connecting rod a227, protrusions a229 are fixedly connected at both ends of the arc-shaped splint a228, a through hole 2210 is provided on the protrusion a229, and a handle 2211 is fixedly connected to one side of the arc-shaped splint a228. The arc-shaped splint a228 is slidably arranged in the slide groove a223 on the mounting plate 222 through the connecting rod a227 and the slider a226. The arc-shaped splint a228 is pulled outward by the handle 2211 to separate the arc-shaped splint a228 and the arc-shaped splint b2214 so as to facilitate the placement of the gate sleeve body 1 to be processed. The arc-shaped splint a228 is provided with a through hole 2210, and the arc-shaped splint b2214 is provided with a support rod 2216 that matches the through hole 2210. The outer ring of the support rod 2216 is provided with a Spring a2217, put the gate sleeve body 1 between the arc splint a228 and the arc splint b2214, and then reset the arc splint a228 through the spring a2217. After the support rod 2216 is inserted into the through hole 2210, the arc splint a228 and the arc splint b2214 complete the clamping and fixing of the gate sleeve body 1; the inner side of the arc splint a228 and the arc splint b2214 are provided with a rubber layer, which can improve the clamping tightness and avoid unnecessary rotation of the gate sleeve body 1.

[0045] like Figure 2 、 Figure 3 and Figure 4As shown, a slider b2212 is slidingly provided in the chute b224, a connecting rod b2213 is fixedly connected to the slider b2212, an arc-shaped splint b2214 is fixedly connected to the front end of the connecting rod b2213, and protrusions b2215 are fixedly connected to the two ends of the arc-shaped splint b2214. A support rod 2216 is provided on the protrusion b2215 corresponding to the through hole 2210, and a spring a2217 is provided on the outer ring of the support rod 2216. The arc-shaped splint b2214 cooperates with the arc-shaped splint a228 to clamp and fix the gate sleeve body 1. At the same time, the arc-shaped splint a228 and the arc-shaped splint b2214 are respectively slidably provided on the mounting plate 222 through the chute a223 and the chute b224, and can move synchronously when the adjustment mechanism 24 drives the base a220 to move, thereby ensuring the continuous and effective clamping and fixation of the gate sleeve body 1, preventing the gate sleeve body 1 from loosening during the processing, and ensuring the processing. The work quality is improved, and the inlet port 11 of the gate sleeve body 1 is better fitted with the grinding head 11; the other end of the spring a2217 is fixedly connected to the through hole 2210, and when the handle 2211 is released, the arc splint a228 can be reset under the action of the spring a2217 and fit tightly with the arc splint b2214 again; the arc splint a228 is limited by the support rod 2216, so that the arc splint a228 and the arc splint b2214 can fit more smoothly.

[0046] like Figure 4 As shown, the grinding mechanism 23 includes a base b230 slidingly set in the slide rail b211, a servo motor b231 fixedly set on the base b230, and a grinding rod 232 fixedly connected to the front end of the servo motor b231 with the servo motor b231. A grinding head 233 is fixedly set at the front end of the grinding rod 232. The bottom of the base b230 is fixedly connected to the limiting block b234 corresponding to the slide rail b211, and a spring b235 is set at the tail end of the base b230. The servo motor b231 drives the polishing rod 232 to rotate, and the polishing head 233 at the front end of the polishing rod 232 is used to polish the inlet port 11 of the gate sleeve body 1; the polishing head 223 is set to a smaller sphere, and cooperates with the adjustment mechanism 24, so that the polishing mechanism 23 can polish the inlet port 11 of the gate sleeve body 1 more evenly, and will not cause uneven force in the inlet port 11 during polishing due to the mismatch of the polishing head 223, causing damage to the gate sleeve body 1, making the polishing device 2 more widely applicable and capable of polishing and grinding different types of gate sleeve bodies 1; the limit block b234 is embedded in the slide rail b211, so that the base b230 moves more smoothly; the spring b235 enables the slide rod 244 to cancel the push on the base b230 to achieve the forward reset of the base b230.

[0047] like Figure 2 and Figure 4As shown, the adjustment mechanism 24 includes a cylinder 240 fixedly arranged on one side of the base a220, and a connecting block 241 is fixedly arranged at the front end of the cylinder 240, and one end of the connecting block 241 is fixedly connected to the base a220. The cylinder 240 can drive the base a220 in the limiting mechanism 22 to move left and right through the connecting block 241, so that the guide block 243 set on the base a220 pushes the slide bar 244 when following the movement of the base a220, so that the slide bar 244 pushes the base b230 in the polishing mechanism 23 to move back and forth, so that the polishing head 233 in the polishing mechanism 23 can polish different parts of the inlet port 11 of the gate sleeve body 1, making the polishing more uniform, and as the adjustment mechanism 24 drives the limiting mechanism 22 and the limiting mechanism 22 clamp When the sprue sleeve body 1 held below moves left and right, the grinding mechanism 23 can move forward and backward synchronously under the action of the adjusting mechanism 24, avoiding interference during polishing and improving the processing quality; before the processing starts, the cylinder 240 drives the base a220 to move away from the cylinder 240, so that the slide rod 244 pushes the base b240 backward, making it easier for workers to place the sprue sleeve body 1 in the limiting mechanism 22. When the processing starts, the cylinder 240 first drives the base a220 to reset, so that the grinding mechanism 23 first grinds the middle part of the inlet port 11.

[0048] like Figure 2 and Figure 4As shown, the adjustment mechanism 24 also includes a sliding seat 242 fixedly arranged between the base a220 and the base b230 and a guide block 243 fixedly arranged on the base a220. A sliding rod 244 is slidingly arranged on the sliding seat 242. One end of the sliding rod 244 is fixedly connected to a convex ball 245. A clamping sleeve 246 is hinged on the outside of the convex ball 245. The other end of the clamping sleeve 246 is fixedly connected to the base b230. The guide block 243 is set in an arc shape, with one end low and the other end high. When the grinding mechanism 23 finishes grinding the middle of the inlet port 11, the cylinder 240 drives the base a220 in the limiting mechanism 22 to move left and right, so that the guide block 243 set on the base a220 moves with the base a220. When the cylinder 240 drives the base a220 to move away from the cylinder 240, the protruding end of the guide block 243 pushes the slide bar 244, so that the slide bar 244 pushes the base b230 in the grinding mechanism 23 to move backward, so that the grinding head 233 in the grinding mechanism 23 can grind different parts of the inlet port 11 of the gate sleeve body 1. Polishing and grinding are performed to make the polishing more uniform. When the cylinder 240 drives the base a220 to reset, the guide block 243 no longer pushes the slide bar 244, and the base b230 moves forward and resets under the action of the spring b235. As the adjusting mechanism 24 drives the limiting mechanism 22 and the gate sleeve body 1 clamped by the limiting mechanism 22 to move left and right, the grinding mechanism 23 can move back and forth synchronously under the action of the adjusting mechanism 24, avoiding interference during polishing and improving the processing quality; the convex ball at one end of the slide bar 244 is hinged in the sleeve 246, with a flexible connection at a certain angle, which avoids the slide bar 244 from being blocked when pushing the base b230. Example 2

[0049] like Figure 4 , wherein the same or corresponding components as those in the first embodiment are designated by the corresponding reference numerals. For simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that a fastening nut 2218 is provided at the front end of the support rod 2216. The front end of the support rod 2216 is threaded. The fastening nut 2218 further enhances the tightness of the arc-shaped clamping plate a228 and the arc-shaped clamping plate b2214 after the support rod 2216 is inserted into the through hole 2210, thereby providing a more secure clamping and fixing of the sprue bushing body 1.

[0050] Working process

[0051] Before the processing starts, the cylinder 240 drives the base a220 to move away from the cylinder 240, so that the slide bar 244 pushes the base b240 backward, which is convenient for the worker to place the gate sleeve body 1 in the limit mechanism 22. The worker pulls the arc splint a228 outward through the handle 2211 to separate the arc splint a228 and the arc splint b2214 to facilitate the placement of the gate sleeve body 1 to be processed, and puts the gate sleeve body 1 between the arc splint a228 and the arc splint b2214. Then, the handle 2211 is released to allow the arc splint a228 to reset through the spring a2217. After the support rod 2216 is inserted into the through hole 2210, the arc splint a228 and the arc splint b2214 complete the clamping and fixing of the gate sleeve body 1. Then the cylinder 240 drives the base a220 to reset so that the grinding mechanism 23 first grinds the middle part of the inlet port 11, then turns on the servo motor a221 and the servo motor b231 to drive the gate sleeve body 1 and the grinding head 233 clamped by the arc splint a228 and the arc splint b2214 to rotate respectively, and the grinding head 233 first grinds the middle part of the inlet port 11. When the grinding head 233 finishes polishing the middle part of the inlet port 11, the cylinder 240 drives the base a220 to move away from the cylinder 240, and pushes the slide bar 244 through the protruding end of the guide block 243, so that the slide bar 244 pushes the base b230 to move backward, and the side of the inlet port 11 is polished by the grinding head 233. When the polishing inside the inlet port 11 is completed, turn off the servo motor a221 and the servo motor b231, and then remove the gate sleeve body 1 from the limiting mechanism 22.

[0052] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0053] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0054] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art based on the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A production process for a sprue bushing of a die casting machine, characterized in that: The invention comprises a sprue sleeve body (1), wherein the front end of the sprue sleeve body (1) is provided with an inlet port (11), and the interior of the sprue sleeve body (1) is provided with an injection channel (12), wherein the injection channel (12) is in the shape of a hollow cylinder and is used to guide the raw material entering the inlet port (11). The process comprises the following steps: Step 1: Milling: Milling the gate sleeve body (1); Step 2: Nitriding: the entire gate sleeve body (1) after turning and milling is subjected to nitriding treatment; Step 3: polishing, the inlet port (11) of the nitrided sprue sleeve body (1) is polished and ground by a polishing device (2); Step 4: coating, coating the surface of the polished gate sleeve body (1) to obtain a product; The polishing device (2) in step 3 comprises a processing table (21), a limiting mechanism (22) and a grinding mechanism (23) slidably arranged on the processing table (21), and an adjusting mechanism (24) is arranged between the limiting mechanism (22) and the grinding mechanism (23); The processing table (21) is provided with a slide rail a (210) and a slide rail b (211); The limiting mechanism (22) comprises a base a (220) slidably arranged in a slide rail a (210); The grinding mechanism (23) comprises a base b (230) slidably arranged in the slide rail b (211), a servo motor b (231) fixedly arranged on the base b (230), and a grinding rod (232) fixedly connected to the front end of the servo motor b (231) with the servo motor b (231), a grinding head (233) fixedly arranged at the front end of the grinding rod (232), a limiting block b (234) fixedly connected to the bottom of the base b (230) corresponding to the slide rail b (211), and a spring b (235) arranged at the rear end of the base b (230); The regulating mechanism (24) comprises a cylinder (240) fixedly arranged on one side of the base a (220); a connecting block (241) is fixedly arranged at the front end of the cylinder (240); one end of the connecting block (241) is fixedly connected to the base a (220); The adjustment mechanism (24) further includes a sliding seat (242) fixedly arranged between the base a (220) and the base b (230) and a guide block (243) fixedly arranged on the base a (220), a sliding rod (244) slidingly arranged on the sliding seat (242), one end of the sliding rod (244) fixedly connected to a convex ball (245), the convex ball (245) is hingedly connected to a clamping sleeve (246) on the outside, and the other end of the clamping sleeve (246) is fixedly connected to the base b (230).

2. The production process of a sprue bushing for a die-casting machine according to claim 1, characterized in that: The limiting mechanism (22) further comprises a servo motor a (221) fixedly mounted on a base a (220) and a mounting plate (222) fixedly connected to the front end of the servo motor a (221) with the servo motor a (221), wherein a slide groove a (223) and a slide groove b (224) are provided on the mounting plate (222), and a limiting block a (225) is provided at the bottom of the base a (220) corresponding to the slide rail a (210).

3. The production process of a sprue bushing for a die-casting machine according to claim 2, characterized in that: A slider a (226) is slidably provided in the slide groove a (223), a connecting rod a (227) is fixedly connected to the slider a (226), a front end of the connecting rod a (227) is fixedly connected to an arc-shaped clamping plate a (228), both ends of the arc-shaped clamping plate a (228) are fixedly connected to protrusions a (229), a through hole (2210) is provided on the protrusion a (229), and a handle (2211) is fixedly connected to one side of the arc-shaped clamping plate a (228).

4. The production process of a sprue bushing for a die-casting machine according to claim 3, characterized in that: A slider b (2212) is slidably provided in the slide groove b (224), a connecting rod b (2213) is fixedly connected to the slider b (2212), a front end of the connecting rod b (2213) is fixedly connected to an arc-shaped clamping plate b (2214), both ends of the arc-shaped clamping plate b (2214) are fixedly connected to protrusions b (2215), a support rod (2216) is provided on the protrusion b (2215) corresponding to the through hole (2210), an outer ring of the support rod (2216) is provided with a spring a (2217), and a fastening nut (2218) is provided at the front end of the support rod (2216).

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