Dry ice spraying type deburring device

Through the dry ice spray deburring device, the dry ice is chopped and sprayed into the fixture, solving the problems of low efficiency and incompleteness of traditional manual deburring methods, achieving rapid and thorough burring removal, and improving product quality and production efficiency.

CN119427216AInactive Publication Date: 2025-02-14JIANGSU JUYUAN ELECTRICAL
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202411895095.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-21
Publication Date
2025-02-14
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the prior art, burr problems caused by machining are difficult to effectively remove. The traditional manual deburring method takes a long time, is not thorough, and has many rework times, which affects product quality and delays production.

Method used

A dry ice spray-type deburring device is designed to crush and peel the burrs by chopping and spraying them into the fixture by slashing and spraying them into the fixture.

Benefits of technology

The rapid and thorough burr removal is achieved, and the product quality and production efficiency is improved, especially when handling fine pores below 3mm.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119427216A_ABST
    Figure CN119427216A_ABST
Patent Text Reader

Abstract

The invention belongs to the technical field of burr removal, and discloses a dry ice spraying type burr removing device which comprises an operation table, a lower clamp is arranged on the surface of the operation table, an upper clamp abuts against the upper end of the lower clamp, a magnetic block is fixedly installed on the inner wall of the side, close to the upper clamp, of the lower clamp, and a fixing mechanism is arranged in the operation table. A supporting plate is fixedly installed at the upper end of the operation table, a fixing plate is fixedly installed in the supporting plate, an ice placing groove is fixedly installed at one end of the fixing plate, and an ice placing plate is fixedly connected to one end of the ice placing groove. A transmission chain drives a driven chain wheel to rotate, a blade ice cutting assembly can conveniently cut dry ice, the cut dry ice is conveyed into an ice receiving and discharging assembly through an ice discharging base, the ice receiving and discharging assembly conveys the cut dry ice into a spraying assembly through an ice discharging pipe, the dry ice is sprayed into a clamp through a dry ice spraying opening, and burrs of an object are removed.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to the technical field of burr removal, and in particular to a dry ice blasting type deburring device. Background Art

[0002] Aluminum parts such as air valves, threaded holes, cross holes, fine holes, deep holes, etc., the burrs generated after machining need to be removed. This type of product has a high degree of cleanliness inside the pores and no burrs or aluminum chips are allowed, otherwise the performance will be affected.

[0003] At present, the pain point of valve group products lies in the burr problem after machining. The traditional method is mainly manual deburring, which takes a long time, is not clean, and requires many repairs. It affects product quality and delays production. It is impossible to effectively detect fine holes below 3mm, and the abnormality is easily transferred to the client.

[0004] Therefore, a dry ice blasting deburring device is proposed, and the device is upgraded and modified to solve these deficiencies. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of the background technology and provide a dry ice blasting deburring device.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A dry ice blasting deburring device comprises an operating table, a lower clamp is arranged on the surface of the operating table, an upper clamp is abutted on the upper clamp at the upper end of the lower clamp, a magnetic block is fixedly installed on the inner wall of the side close to the upper clamp, a fixing mechanism is arranged inside the operating table, a support plate is fixedly installed on the upper end of the operating table, a fixing plate is fixedly installed on the inside of the support plate, an ice placing groove is fixedly installed on one end of the fixing plate, an ice placing plate is fixedly connected to one end of the ice placing groove, an ice pushing mechanism is arranged inside the ice placing groove, a motor is fixedly installed on the lower side of one end of the fixing plate close to the ice placing groove, and the motor The output shaft of the machine is fixedly installed with a driving sprocket, the outer end of the driving sprocket is meshed with a transmission chain, the inner side of the upper end of the transmission chain is meshed with a driven sprocket, the middle of the driven sprocket passes through a fixed plate and is fixedly installed with a blade ice cutting assembly, a lower ice seat is fixedly installed on the lower side of the outer end of the fixed plate, one end of the lower ice seat is connected to the bottom of the inner wall of the ice placing trough, an ice receiving and ice discharging assembly is fixedly installed on the lower end of the lower ice seat, an ice discharging pipe is fixedly installed on the outer end of the ice receiving and ice discharging assembly, an injection assembly is fixedly installed on one end of the ice discharging pipe, and a dry ice injection port is fixedly installed on the lower end of the injection assembly.

[0007] Furthermore, the fixing mechanism includes motor 2, the inner wall of the operating table is fixedly mounted with motor 2, the output shaft of motor 2 is fixedly mounted with a threaded rod, the threads on both sides of the outer end of the threaded rod are opposite, the end of the threaded rod away from motor 2 is rotatably connected to the inner wall of the operating table through a bearing, the outer ends of the threaded rod are threadedly connected with threaded plates on both sides, the upper end of the threaded plate is fixedly mounted with a connecting block, and the upper end of the connecting block is fixedly mounted with a clamping plate.

[0008] Furthermore, a guide rod is slidably connected to the inner wall of the threaded plate, and both ends of the guide rod are fixedly mounted to the inner wall of the operating table. A sliding groove is provided on the surface of the operating table for the outer end of the connecting block to be slidably connected.

[0009] Furthermore, a tensioning idler wheel is rotatably connected to the lower side of the outer end of the fixing plate, and the outer end of the tensioning idler wheel is meshingly connected to the outer end of the transmission chain.

[0010] Furthermore, an observation window is fixedly mounted on the upper side of the outer end of the ice discharging assembly.

[0011] Furthermore, the ice-pushing mechanism includes a motor three, a support rod is fixedly installed on the inner wall of the support plate, a motor three is fixedly installed on the inner wall of the support rod, a screw rod is fixedly installed on the output shaft of the motor three, one end of the screw rod away from the motor three is rotatably connected to the inner wall of the support plate through a bearing, a threaded block is threadedly connected to the outer end of the screw rod, both ends of the threaded block are fixedly connected to sliders, one end of the slider extends out of the support rod and is fixedly connected to a sliding frame, the inner side of the sliding frame is slidably connected to the outer end of the support rod, the lower end of the sliding frame is fixedly connected to a pushing frame, and one end of the pushing frame is on the inner side of the ice trough.

[0012] Furthermore, both sides of the outer end of the support rod are provided with sliding grooves for the outer end of the sliding block to be slidably connected.

[0013] Furthermore, a hydraulic cylinder is fixedly mounted on the inner wall of the support plate, an output shaft of the hydraulic cylinder is fixedly mounted on the outer end of the injection assembly, a guide block is fixedly mounted on the outer end of the injection assembly, and a guide groove is provided on the inner wall of the support plate for sliding connection of the outer end of the guide block.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention puts dry ice into the ice trough, starts the motor to drive the driving sprocket to rotate, and drives the driven sprocket to rotate by the transmission chain, so that the blade ice cutting assembly can cut the dry ice, and the cut dry ice is transported to the ice receiving and discharging assembly through the lower ice seat, and the ice receiving and discharging assembly is transported to the spraying assembly through the ice discharging pipe, and the dry ice is sprayed inside the fixture through the dry ice spraying port to remove the burrs of the object. Since the temperature of the dry ice particles themselves reaches -78°, they sublimate from solid to gas at room temperature and absorb a large amount of heat energy, resulting in a rapid drop in the temperature of the workpiece to be cleaned and deburred, and an increase in brittleness. At the same time, the dry ice particles are driven by compressed air and sprayed at a very high speed onto the surface to be processed. This high-speed impact can generate a strong force to directly break and peel the burrs from the surface of the workpiece.

[0015] 2. The present invention starts the motor to drive the screw rod to rotate, so that the threaded block drives the sliding frame at one end of the slider to move, so that the push frame pushes the dry ice, so that the dry ice can be continuously shredded, thereby improving the shredding efficiency of the dry ice.

[0016] 3. The present invention starts the second motor to drive the threaded rod to rotate, so that the threaded plate drives the clamping plate at the upper end of the connecting block to move toward each other, which is convenient for fixing the clamp and improving the stability of the object during deburring.

[0017] 4. The present invention ensures easy operation by simultaneously adopting self-centering clamping (upper clamp, magnetic block and lower clamp), allowing operators to quickly clamp and use special tooling to process six sides at one time, thereby shortening the processing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the ice trough of the present invention; Figure 3 It is a schematic diagram of the structure of the driven sprocket of the present invention; Figure 4 It is a schematic diagram of the structure of the lower clamp and the upper clamp of the present invention; Figure 5 It is a schematic diagram of the support rod structure of the present invention; Figure 6 It is a schematic diagram of the internal structure of the support plate of the present invention; Figure 7 It is a schematic diagram of the internal structure of the operating table of the present invention.

[0019] Reference numerals: 1, operating table; 10, dry ice spray nozzle; 11, lower clamp; 12, upper clamp; 121, magnetic block; 13, support plate; 131, hydraulic cylinder; 132, guide groove; 133, guide block; 134, spray assembly; 14, fixing plate; 141, ice plate; 15, ice groove; 16, motor 1; 161, driving sprocket; 162, tensioning idler; 163, transmission chain; 164, driven sprocket; 165, blade Ice cutting assembly; 17, ice receiving and discharging assembly; 18, lower ice seat; 181, observation window; 19, ice discharging pipe; 2, fixing mechanism; 21, motor two; 22, connecting block; 23, sliding groove; 24, clamping plate; 25, threaded plate; 26, threaded rod; 27, guide rod; 3, ice pushing mechanism; 31, support rod; 32, sliding frame; 33, slider; 34, sliding groove; 35, motor three; 36, threaded block; 37, screw rod; 38, pushing frame. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] like Figures 1 to 7As shown, a dry ice blasting deburring device includes an operating table 1, a lower clamp 11 is arranged on the surface of the operating table 1, an upper clamp 12 is abutted on the upper end of the lower clamp 11, a magnetic block 121 is fixedly installed on the inner wall of the side close to the lower clamp 11 and the upper clamp 12, a fixing mechanism 2 is arranged inside the operating table 1, a support plate 13 is fixedly installed on the upper end of the operating table 1, a fixing plate 14 is fixedly installed inside the support plate 13, an ice placing groove 15 is fixedly installed on one end of the fixing plate 14, an ice placing plate 141 is fixedly connected to one end of the ice placing groove 15, an ice pushing mechanism 3 is arranged inside the ice placing groove 15, a motor 16 is fixedly installed on the lower side of one end of the fixing plate 14 close to the ice placing groove 15, and the motor 16 The output shaft is fixedly installed with a driving sprocket 161, the outer end of the driving sprocket 161 is meshedly connected with a transmission chain 163, the inner side of the upper end of the transmission chain 163 is meshedly connected with a driven sprocket 164, the middle of the driven sprocket 164 passes through the fixed plate 14 and is fixedly installed with a blade ice cutting assembly 165, the lower side of the outer end of the fixed plate 14 is fixedly installed with a lower ice seat 18, one end of the lower ice seat 18 is connected to the bottom of the inner wall of the ice placing groove 15, the lower end of the lower ice seat 18 is fixedly installed with an ice receiving and ice discharging assembly 17, the outer end of the ice receiving and ice discharging assembly 17 is fixedly installed with an ice discharging pipe 19, one end of the ice discharging pipe 19 is fixedly installed with an injection assembly 134, and the lower end of the injection assembly 134 is fixedly installed with a dry ice injection port 10; Specifically, dry ice is placed in the ice placing trough 15, and the driving sprocket 161 is driven to rotate by starting the motor 16, so that the transmission chain 163 drives the driven sprocket 164 to rotate, so that the blade ice cutting assembly 165 can chop the dry ice, and the chopped dry ice is transported to the ice receiving and ice discharging assembly 17 through the lower ice seat 18, and the ice receiving and ice discharging assembly 17 is transported to the injection assembly 134 through the ice discharging pipe, and the dry ice is sprayed into the inside of the fixture through the dry ice injection port 10 to remove burrs from the object.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the lower side of the outer end of the fixed plate 14 is rotatably connected with a tensioning idler wheel 162, the outer end of the tensioning idler wheel 162 is meshedly connected with the outer end of the transmission chain 163, and an observation window 181 is fixedly installed on the upper side of the outer end of the ice discharging assembly 17; specifically, the transmission stability between the driving sprocket 161 and the driven sprocket 164 is improved by the tensioning idler wheel 162, and the dry ice crushing situation is conveniently observed in real time through the observation window 181.

[0026] like Figure 2 , Figure 3 and Figure 5As shown, the ice pushing mechanism 3 includes a motor 35, a support rod 31 is fixedly installed on the inner wall of the support plate 13, the motor 35 is fixedly installed on the inner wall of the support rod 31, and a screw rod 37 is fixedly installed on the output shaft of the motor 35. The end of the screw rod 37 away from the motor 35 is rotatably connected to the inner wall of the support plate 13 through a bearing, the outer end of the screw rod 37 is threadedly connected to a threaded block 36, and both ends of the threaded block 36 are fixedly connected to a slider 33, and one end of the slider 33 extends out of the support rod 31 and is fixedly connected to the slider The inner side of the sliding frame 32 is slidably connected to the outer end of the support rod 31, and the lower end of the sliding frame 32 is fixedly connected with a push frame 38, one end of the push frame 38 is on the inner side of the ice placing groove 15, and both sides of the outer end of the support rod 31 are provided with slide grooves 34 for the outer end of the slider 33 to be slidably connected; specifically, by starting the motor 35 to drive the screw rod 37 to rotate, the threaded block 36 drives the sliding frame 32 at one end of the slider 33 to move, so that the push frame 38 pushes the dry ice, so that the dry ice can be continuously shredded.

[0027] like Figure 1 and Figure 6 As shown, a hydraulic cylinder 131 is fixedly installed on the inner wall of the support plate 13, the output shaft of the hydraulic cylinder 131 is fixedly installed on the outer end of the injection assembly 134, a guide block 133 is fixedly installed on the outer end of the injection assembly 134, and a guide groove 132 is provided on the inner wall of the support plate 13 for sliding connection of the outer end of the guide block 133; specifically, by starting the hydraulic cylinder 131, the dry ice injection port 10 is driven to adjust its position, thereby improving the cleaning effect on the object.

[0028] like Figure 1 and Figure 7 As shown, the fixing mechanism 2 includes a motor 21, the motor 21 is fixedly installed on the inner wall of the operating table 1, and a threaded rod 26 is fixedly installed on the output shaft of the motor 21. The threads on both sides of the outer ends of the threaded rod 26 are opposite, and the end of the threaded rod 26 away from the motor 21 is rotatably connected to the inner wall of the operating table 1 through a bearing, and threaded plates 25 are threadedly connected on both sides of the outer ends of the threaded rod 26, and a connecting block 22 is fixedly installed on the upper end of the threaded plate 25, and a clamping plate 24 is fixedly installed on the upper end of the connecting block 22; specifically, by starting the motor 21 to drive the threaded rod 26 to rotate, the threaded plate 25 drives the clamping plate 24 at the upper end of the connecting block 22 to move toward each other, which is convenient for fixing the fixture and improving the stability of the object during deburring.

[0029] like Figure 1 and Figure 7 As shown, the inner wall of the threaded plate 25 is slidably connected with a guide rod 27, and both ends of the guide rod 27 are fixedly installed with the inner wall of the operating table 1. The surface of the operating table 1 is provided with a sliding groove 23 for sliding connection of the outer end of the connecting block 22; specifically, it is convenient for the threaded plate 25 to move stably.

[0030] In summary, when it is necessary to remove burrs from a compact object, the object is placed in the lower clamp 11, the upper clamp 12 is fixed to the lower clamp 11 by the magnetic block 121, the threaded rod 26 is driven to rotate by the starting motor 21, so that the threaded plate 25 drives the clamping plate 24 at the upper end of the connecting block 22 to move toward each other, so as to fix the clamp, and the dry ice is placed in the ice trough 15, the driving sprocket 161 is driven to rotate by the starting motor 16, so that the transmission chain 163 drives the driven sprocket 164 to rotate, so that the blade ice cutting assembly 165 can cut the dry ice into pieces, and the cut dry ice is cut into pieces by the lower ice seat 18. The ice is transported to the ice receiving and discharging assembly 17, and the ice receiving and discharging assembly 17 is transported to the spraying assembly 134 through the ice discharging pipe. The dry ice is sprayed inside the fixture through the dry ice spraying port 10 (the material is made of antifreeze brittle material, and the shape is made of slender hole nozzle to ensure the spraying air pressure) to remove the burrs of the object. Since the temperature of the dry ice particles themselves reaches -78°, they sublimate from solid to gas at room temperature and absorb a large amount of heat energy, causing the temperature of the workpiece to be cleaned and deburred to drop rapidly, and the brittleness increases. At the same time, the dry ice particles of the dry ice equipment are driven by compressed air and sprayed at a very high speed onto the surface to be processed. This high-speed impact can generate a strong force to directly break and peel the burrs from the surface of the workpiece; By starting the motor 35 to drive the screw rod 37 to rotate, the threaded block 36 drives the sliding frame 32 at one end of the slider 33 to move, so that the push frame 38 pushes the dry ice, so that the dry ice can be continuously chopped.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dry ice blasting deburring device, comprising an operating table (1), characterized in that: The surface of the operating table (1) is provided with a lower clamp (11), the upper end of the lower clamp (11) is abutted against the upper clamp (12), a magnetic block (121) is fixedly installed on the inner wall of the lower clamp (11) on the side close to the upper clamp (12), a fixing mechanism (2) is provided inside the operating table (1), a supporting plate (13) is fixedly installed on the upper end of the operating table (1), a fixing plate (14) is fixedly installed inside the supporting plate (13), an ice placing groove (15) is fixedly installed on one end of the fixing plate (14), an ice placing plate (141) is fixedly connected to one end of the ice placing groove (15), an ice pushing mechanism (3) is provided inside the ice placing groove (15), a motor 1 (16) is fixedly installed on the lower side of one end of the fixing plate (14) close to the ice placing groove (15), and the output shaft of the motor 1 (16) is fixedly installed on the lower side of the one end of the fixing plate (14) close to the ice placing groove (15). A driving sprocket (161) is provided, the outer end of the driving sprocket (161) is meshedly connected with a transmission chain (163), the inner side of the upper end of the transmission chain (163) is meshedly connected with a driven sprocket (164), the middle of the driven sprocket (164) passes through a fixed plate (14) and is fixedly mounted with a blade ice cutting assembly (165), a lower ice seat (18) is fixedly mounted on the lower side of the outer end of the fixed plate (14), one end of the lower ice seat (18) is connected to the bottom of the inner wall of the ice placing groove (15), an ice receiving and discharging assembly (17) is fixedly mounted on the lower end of the lower ice seat (18), an ice discharging pipe (19) is fixedly mounted on the outer end of the ice receiving and discharging assembly (17), an injection assembly (134) is fixedly mounted on one end of the ice discharging pipe (19), and a dry ice injection port (10) is fixedly mounted on the lower end of the injection assembly (134).

2. A dry ice blasting deburring device as claimed in claim 1, characterized in that: The fixing mechanism (2) comprises a second motor (21), the second motor (21) is fixedly mounted on the inner wall of the operating table (1), a threaded rod (26) is fixedly mounted on the output shaft of the second motor (21), the threads on both sides of the outer end of the threaded rod (26) are opposite, one end of the threaded rod (26) away from the second motor (21) is rotatably connected to the inner wall of the operating table (1) via a bearing, the threads on both sides of the outer end of the threaded rod (26) are connected to a threaded plate (25), the upper end of the threaded plate (25) is fixedly mounted with a connecting block (22), and the upper end of the connecting block (22) is fixedly mounted with a clamping plate (24).

3. A dry ice blasting deburring device as claimed in claim 2, characterized in that: The inner wall of the threaded plate (25) is slidably connected to a guide rod (27), and both ends of the guide rod (27) are fixedly mounted to the inner wall of the operating table (1). The surface of the operating table (1) is provided with a sliding groove (23) for the outer end of the connecting block (22) to be slidably connected.

4. A dry ice blasting deburring device as claimed in claim 1, characterized in that: A tensioning idler wheel (162) is rotatably connected to the lower side of the outer end of the fixing plate (14), and the outer end of the tensioning idler wheel (162) is meshingly connected to the outer end of the transmission chain (163).

5. A dry ice blasting deburring device as claimed in claim 1, characterized in that: An observation window (181) is fixedly mounted on the upper side of the outer end of the ice discharging assembly (17).

6. A dry ice blasting deburring device as claimed in claim 1, characterized in that: The ice pushing mechanism (3) comprises a motor three (35), a support rod (31) is fixedly mounted on the inner wall of the support plate (13), the motor three (35) is fixedly mounted on the inner wall of the support rod (31), a screw rod (37) is fixedly mounted on the output shaft of the motor three (35), one end of the screw rod (37) away from the motor three (35) is rotatably connected to the inner wall of the support plate (13) through a bearing, the outer end of the screw rod (37) is threadedly connected to a threaded block (36), both ends of the threaded block (36) are fixedly connected to a slider (33), one end of the slider (33) extends out of the support rod (31) and is fixedly connected to a sliding frame (32), the inner side of the sliding frame (32) is slidably connected to the outer end of the support rod (31), the lower end of the sliding frame (32) is fixedly connected to a pushing frame (38), one end of the pushing frame (38) is located on the inner side of the ice placing groove (15).

7. A dry ice blasting deburring device as claimed in claim 6, characterized in that: Sliding grooves (34) for slidingly connecting the outer end of the sliding block (33) are provided on both sides of the outer end of the supporting rod (31).

8. A dry ice blasting deburring device as claimed in claim 1, characterized in that: A hydraulic cylinder (131) is fixedly mounted on the inner wall of the support plate (13); an output shaft of the hydraulic cylinder (131) is fixedly mounted on the outer end of the injection assembly (134); a guide block (133) is fixedly mounted on the outer end of the injection assembly (134); and a guide groove (132) is provided on the inner wall of the support plate (13) for sliding connection with the outer end of the guide block (133).