Improved structure of a hydraulic oil injection cylinder

Abstract

The application provides an improved glue injection cylinder structure, which comprises a glue injection rack, a support column movably installed on the top of a displacement sliding seat through a bearing, a sleeve plate fixedly arranged at the middle part of the support column, a toothed plate arranged at the front end of an arc-shaped front cover, and a lower gear member movably arranged at one side of the inside of a bottom cavity; the bottom support structure of the glue injection cylinder is improved, a movable displacement sliding seat is arranged in the bottom cavity of the glue injection rack, the bottom of the cylinder seat is supported and fixed through a fixed arm plate and a fixed seat, the displacement sliding seat can be driven to move by a lead screw, the position of the cylinder seat is adjusted, the cylinder seat retreats, the lower gear member and an upper gear member are driven to rotate synchronously through a rack, the upper gear member is engaged with the toothed plate, the toothed plate is driven to shift towards the inside, one end of the cylinder body with a cylinder output rod can shift towards the outside, the maintenance space of the cylinder output rod at the front end of the cylinder seat is emptied, and the cylinder output rod is conveniently disassembled and maintained.

Description

Technical Field

[0001] This invention belongs to the field of injection molding machine technology and relates to an improved injection cylinder structure. Background Technology

[0002] An injection molding machine is a primary molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and injects it to fill the mold cavity.

[0003] The plasticizing unit of a screw injection molding machine mainly consists of a feeding device, barrel, screw, glue coating assembly, and nozzle. The power transmission device includes an injection cylinder, an injection seat moving cylinder, and a screw drive device. The traditional injection cylinder structure has the following disadvantages:

[0004] 1. Traditional hydraulic cylinder structures have two bearing shafts arranged side by side, and both bearing shafts are solid structures. This results in a large weight of the entire bearing shaft, making the entire injection cylinder overweight and failing to meet current requirements for lightweight injection cylinders.

[0005] 2. Traditional hydraulic cylinder structures are directly fixed on the injection platform. During injection, the cylinder output rod pushes the screw forward, injecting molten material into a low-temperature closed mold at high pressure and speed. After prolonged use, the cylinder output rod is prone to wear and displacement, requiring disassembly and maintenance. However, the existing hydraulic cylinder output rod has limited space between itself and the end of the screw, and the output rod cannot be moved or its direction adjusted. This makes disassembly and maintenance difficult in such a confined space, necessitating improvement. Summary of the Invention

[0006] The purpose of this invention is to provide an improved injection cylinder structure to solve the problems mentioned in the background art.

[0007] An improved injection cylinder structure includes an injection stand, a cylinder seat, and a cylinder body. The cylinder seat is located on the top of the injection stand, and the cylinder body is installed inside the cylinder seat. A front cover is located at one end of the cylinder body, and a rear cover is located at the other end. An internal spline is provided at the tail end of the rear cover. A cylinder rear cover body is installed inside the rear cover, and the cylinder rear cover body is positioned at the center of the cylinder body. A splined shaft is located inside the cylinder rear cover body. A piston is mounted on the front end of the splined shaft via a thrust self-aligning roller bearing. The tail end of the splined shaft engages with the internal spline, and the piston slides within the cylinder. Inside the piston chamber formed between the rear cover and the cylinder body, a bottom cavity is provided at the top of the injection stage. The bottom cavity is located at the bottom of the cylinder seat. A displacement groove is provided inside the bottom cavity. A displacement slide is slidably arranged inside the displacement groove. A support column is movably mounted on the top of the displacement slide via a bearing. A sleeve plate is fixedly fitted at the middle of the support column. Side arms are provided on both sides of the sleeve plate. A slide rod is movably fitted inside the side arms. One end of the slide rod is connected to an inner support seat. An arc-shaped front cover is provided at the front end of the inner support seat. A toothed plate is provided at the middle of the front end of the arc-shaped front cover. A lower gear is movably arranged on one side inside the bottom cavity.

[0008] In the above-mentioned improved injection cylinder structure, a clearance groove is provided on the side of the bottom cavity, the clearance groove is connected to the inside of the bottom cavity, and the depth of the clearance groove is greater than the height of the arc-shaped front cover.

[0009] In the above-mentioned improved injection cylinder structure, a fixed seat is provided on the top of the support column, and a fixed arm plate is provided on the side of the fixed seat. Both the fixed seat and the fixed arm plate are connected to the bottom end of the cylinder seat.

[0010] In the above-mentioned improved injection cylinder structure, a positioning hole is provided at the bottom of the support column, a dust cover is provided on the outside of the bottom cavity, a locking screw is threadedly connected to the outer surface of the dust cover, and one end of the locking screw passes through the dust cover and is threadedly connected to the inside of the positioning hole.

[0011] In the above-mentioned improved injection cylinder structure, the top of the inner support seat is provided with an installation groove, and two installation holes are opened on both sides of the interior of the installation groove. A top plate is installed inside the installation groove, and the side of the top plate is connected to the toothed plate. The top plate and the toothed plate are integrally formed.

[0012] In the above-mentioned improved injection cylinder structure, the top of the top plate is threaded with a screw, and the screw passes through the top plate and is threaded into the mounting hole. The front end of the inner support seat is provided with a guide groove, and the bottom inner side of the toothed plate is provided with a guide rod, which is inserted into the guide groove.

[0013] In the above-mentioned improved injection cylinder structure, a limiting rod is provided on one side of the side arm. One end of the limiting rod is inserted into the limiting slot opened on the inner wall of the bottom cavity. A spring is provided inside the side arm, and the spring is sleeved on the slide rod. Limiting rings are provided on both sides of the spring, and the limiting rings are connected to the slide rod.

[0014] In the above-mentioned improved injection cylinder structure, a support arm is provided on one side of the bottom cavity, an upper gear is installed at the front end of the support arm, and the bottom end of the upper gear is connected to the center position of the lower gear through a rotating rod. A side plate is provided on the side of the displacement slide, and a rack is provided at the tail end of the side plate, and the rack meshes with the side of the lower gear.

[0015] In the above-mentioned improved injection cylinder structure, a lead screw is provided inside the displacement slide groove, and the lead screw is threadedly connected to the displacement slide block. An adjustment turntable is provided at the end of the injection stage, and one end of the lead screw passes through the injection stage and is connected to the adjustment turntable.

[0016] Compared with the prior art, the advantages of the improved injection cylinder structure of the present invention are as follows:

[0017] 1. This application improves the spline shaft structure inside the injection cylinder by changing the design of the double bearing shaft to a single spline shaft in the middle, and the single spline shaft is hollow. This simplifies the number and weight of the spline shaft, greatly reducing the weight of the entire injection cylinder, making the entire injection cylinder meet the requirements of lightweight use.

[0018] 2. This application improves the bottom support structure of the injection cylinder by setting a movable displacement slide inside the bottom cavity of the injection stage. The bottom of the cylinder seat is supported and fixed by a fixed arm plate and a fixed seat. The displacement slide can be driven by a screw to adjust the position of the cylinder seat, so that the cylinder seat moves backward, freeing up maintenance space for the output rod at the front end of the cylinder seat, which facilitates the disassembly and maintenance of the cylinder output rod.

[0019] This application features a movable support column at the top of the displacement slide, with a sleeve plate fitted in the middle of the support column. The front section of the sleeve plate is movably supported by two sliding rods, housing an arc-shaped front cover and a gear plate. An upper gear component that mates with the gear plate is located on the other side of the bottom cavity. A side plate with a rack is provided on the side of the displacement slide. When maintenance of the hydraulic cylinder is required, the displacement slide is slid towards the rear end via a lead screw. As the displacement slide slides, the arc-shaped front cover moves towards the upper gear component, while the side plate simultaneously moves the rack towards the lower gear component. When the gear plate in the middle of the arc-shaped front cover mates with the upper gear component... When the gear components are engaged, the rack on the side plate also begins to mesh with the lower gear component. This, in turn, drives the lower and upper gear components to rotate synchronously through the rack. The upper gear component meshes with the gear plate, causing the gear plate to shift inward. This causes the support column connected to the arc-shaped front cover to rotate, which in turn causes the cylinder seat and the tail end of the cylinder body to move inward toward the inside of the injection molding stand. Meanwhile, the end of the cylinder body with the output rod can shift outward. This significantly increases the space at the output rod, making it easier for operators to disassemble and maintain the output rod. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an improved injection cylinder structure according to the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the bottom cavity of an improved injection cylinder structure according to the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the cylinder output rod after offsetting, which is an improved injection cylinder structure according to the present invention.

[0023] Figure 4 This is a schematic diagram of the arc-shaped front cover structure of an improved injection cylinder structure according to the present invention.

[0024] Figure 5 This is a schematic diagram of the slide bar structure of an improved injection cylinder structure according to the present invention.

[0025] Figure 6 This is a schematic diagram of the mounting groove structure of an improved injection cylinder structure according to the present invention.

[0026] Figure 7 This is a schematic diagram of the toothed plate structure of an improved injection cylinder structure according to the present invention.

[0027] Figure 8 This is a schematic diagram of the internal structure of the cylinder body of an improved injection cylinder structure according to the present invention.

[0028] In the diagram: 1. Injection stand; 2. Cylinder seat; 3. Cylinder body; 4. Dust cover; 5. Locking screw; 6. Adjusting turntable; 7. Cylinder front cover; 8. Bottom cavity; 9. Displacement slide; 10. Displacement slide block; 11. Support arm; 12. Lower gear component; 13. Clearance groove; 14. Upper gear component; 15. Fixed arm plate; 16. Limiting slot; 17. Arc-shaped front cover; 18. Support column; 19. Fixed seat; 20. Sleeve plate; 21. Side arm 22. Limiting rod; 23. Side plate; 24. Rack; 25. Positioning hole; 26. Lead screw; 27. Slide rod; 28. Spring; 29. ​​Limiting collar; 30. Top plate; 31. Gear plate; 32. Inner support seat; 33. Mounting groove; 34. Guide groove; 35. Mounting hole; 36. Guide rod; 37. Cylinder rear cover; 38. Cylinder rear cover body; 39. Splined shaft; 40. Shaft piston; 41. Thrust self-aligning roller bearing; 42. Internal spline. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] An improved injection cylinder structure includes an injection stand 1, a cylinder seat 2, and a cylinder body 3. The cylinder seat 2 is located on the top of the injection stand 1, and the cylinder body 3 is installed inside the cylinder seat 2. A cylinder front cover 7 is located at one end of the cylinder body 3, and a cylinder rear cover 37 is located at the other end of the cylinder body 3. An internal spline 42 is provided at the tail end of the cylinder rear cover 37. A cylinder rear cover body 38 is installed inside the cylinder rear cover 37, and the cylinder rear cover body 38 is located at the center position inside the cylinder body 3. A splined shaft 39 is provided inside the cylinder rear cover body 38. A piston 40 is mounted on the front end of the splined shaft 39 through a thrust self-aligning roller bearing 41. The tail end of the splined shaft 39 cooperates with the internal spline 42, and the piston 40 slides on the cylinder. Inside the piston chamber formed between the rear cover 38 and the cylinder body 3, a bottom cavity 8 is provided at the top of the injection stage 1. The bottom cavity 8 is located at the bottom of the cylinder seat 2. A displacement groove 9 is provided inside the bottom cavity 8. A displacement slide 10 is slidably arranged inside the displacement groove 9. A support column 18 is movably installed on the top of the displacement slide 10 through a bearing. A sleeve plate 20 is fixedly fitted in the middle of the support column 18. Side arms 21 are provided on both sides of the sleeve plate 20. A slide rod 27 is movably fitted inside the side arms 21. One end of the slide rod 27 is connected to an inner support seat 32. An arc-shaped front cover 17 is provided at the front end of the inner support seat 32. A toothed plate 31 is provided in the middle of the front end of the arc-shaped front cover 17. A lower gear 12 is movably arranged on one side inside the bottom cavity 8.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, this invention discloses an improved injection cylinder structure. Specifically, a clearance groove 13 is provided on the side of the bottom cavity 8. The clearance groove 13 communicates with the interior of the bottom cavity 8, and the depth of the clearance groove 13 is greater than the height of the arc-shaped front cover 17. The clearance groove 13 is provided in this application mainly to avoid the arc-shaped front cover 17, preventing the end of the arc-shaped front cover 17 from being obstructed when it rotates. After the clearance groove 13 is provided, when the arc-shaped front cover 17 rotates inward, it can enter the interior of the clearance groove 13, thus not affecting the rotation of the arc-shaped front cover 17.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this invention discloses an improved injection cylinder structure. Specifically, a fixed seat 19 is provided on the top of the support column 18, and a fixed arm plate 15 is provided on the side of the fixed seat 19. Both the fixed seat 19 and the fixed arm plate 15 are connected to the bottom of the cylinder seat 2. The support column 18, the fixed seat 19, and the fixed arm plate 15 in this application are all made of metal. The fixed seat 19 and the fixed arm plate 15 have threaded holes inside for fixing the cylinder seat 2. A reinforcing rod is also connected to the bottom of the fixed arm plate 15. One end of the reinforcing rod is connected to the bottom of the fixed arm plate 15, and the other end is connected to the support column 18. The reinforcing rod mainly provides reinforcement and support for the fixed arm plate 15.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, this invention discloses an improved injection cylinder structure. Specifically, the bottom of the support column 18 has a positioning hole 25, and a dust cover 4 is provided on the outer side of the bottom cavity 8. A locking screw 5 is threaded onto the outer surface of the dust cover 4, and one end of the locking screw 5 passes through the dust cover 4 and is threaded into the inside of the positioning hole 25. The dust cover 4 is located at the outer port of the bottom cavity 8 and is made of plastic. The inner side of the dust cover 4 has a rubber strip that contacts the bottom of the cylinder seat 2 for simple sealing protection. This prevents external dust from easily escaping. The screw 26 can easily enter the bottom cavity 8 and has a certain dustproof function. The locking screw 5 is mainly used to limit the support column 18. When the displacement slide 10 slides to the designated position, the cylinder seat 2 also moves into place. At this time, the locking screw 5 is rotated so that one end of the locking screw 5 is inserted into the positioning hole 25 at the bottom of the support column 18, thereby locking the support column 18. At the same time, after the support column 18 is positioned laterally, the position of the displacement slide 10 is also limited to prevent the lead screw 26 from loosening and causing the displacement slide 10 to shift.

[0034] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the present invention discloses an improved injection cylinder structure. Specifically, the top of the inner support base 32 is provided with an installation groove 33. Two installation holes 35 are opened on both sides of the interior of the installation groove 33. A top plate 30 is installed inside the installation groove 33. The side of the top plate 30 is connected to the toothed plate 31, and the top plate 30 and the toothed plate 31 are integrally formed. The toothed plate 31 of this application is replaceable. When the toothed plate 31 is installed, when the top plate 30 is placed inside the installation groove 33, the guide rod 36 on the inner side of the toothed plate 31 is inserted into the guide groove 34, so that the toothed plate 31 fits against the middle position of the arc-shaped front cover 17. Then, the top plate 30 is locked at the top of the top plate 30 by screws.

[0035] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the present invention provides an improved injection cylinder structure. Specifically, the top of the top plate 30 is threaded with a screw, and the screw passes through the top plate 30 and is threaded into the mounting hole 35. The inner support seat 32 has a guide groove 34 at the center of its front end, and the toothed plate 31 has a guide rod 36 on its bottom inner side, which is inserted into the guide groove 34.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, this invention discloses an improved injection cylinder structure. Specifically, a limiting rod 22 is provided on one side of the side arm 21. One end of the limiting rod 22 is inserted into the limiting slot 16 opened on the inner wall of the bottom cavity 8. A spring 28 is provided inside the side arm 21 and is sleeved on the slide rod 27. Limiting collars 29 are provided on both sides of the spring 28 and are connected to the slide rod 27. The spring 28 in this application mainly supports the tail end of the slide rod 27. The spring 28 is a commercially available device known to those skilled in the art. Here, we are only using it without making any structural or functional improvements. We will not go into details here. The limiting rod 22 is inserted into the limiting slot 16 to limit the support column 18 and prevent the support column 18 from rotating.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, this invention discloses an improved injection cylinder structure. Specifically, a support arm 11 is provided on one side of the bottom cavity 8. An upper gear 14 is mounted on the front end of the support arm 11, and the bottom end of the upper gear 14 is connected to the center position of the lower gear 12 via a rotating rod. A side plate 23 is provided on the side of the displacement slide 10, and a rack 24 is provided at the tail end of the side plate 23. The rack 24 meshes with the side of the lower gear 12. When the displacement slide 10 of this application slides, the side plate 23 also drives the rack 24. As the rack 24 moves toward the lower gear 12, when the toothed plate 31 in the middle of the arc-shaped front cover 17 is in contact with the upper gear 14, the displacement slide 10 continues to move and presses the toothed plate 31 onto the upper gear 14. After the toothed plate 31 is pressed, the rack 24 on the side plate 23 also begins to mesh with the lower gear 12. Then, through the meshing of the rack 24, the lower gear 12 is driven to rotate synchronously. Since the lower gear 12 and the upper gear 14 are coaxially arranged, the upper gear 14 also begins to rotate.

[0038] like Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, this invention discloses an improved injection cylinder structure. Specifically, a lead screw 26 is provided inside the displacement slide 9, and the lead screw 26 is threadedly connected to the displacement slide 10. An adjusting turntable 6 is provided at the end of the injection stage 1. One end of the lead screw 26 passes through the injection stage 1 and connects to the adjusting turntable 6. The lead screw 26 is a commercially available device known to those skilled in the art. Here, we are simply using it without making any structural or functional improvements, and we will not elaborate further. Rotating the adjusting turntable 6 causes the lead screw 26 to drive the displacement slide 10 to slide.

[0039] Working principle: When installing the cylinder body 3 of this application, the specific operation is as follows: First, rotate the adjusting turntable 6 so that the lead screw 26 drives the displacement slide 10 to slide, so that the limiting rod 22 at the front end of the displacement slide 10 is inserted into the limiting slot 16. Then, rotate the locking screw 5 so that one end of the locking screw 5 is inserted into the positioning hole 25, thereby fixing the fixed arm plate 15 and the fixed seat 19 at the top of the support column 18. After the fixed arm plate 15 and the fixed seat 19 are fixed and do not wobble, the cylinder seat 2 can be installed on the top of the fixed arm plate 15 and the fixed seat 19. Then, the cylinder body 3 is installed inside the cylinder seat 2, and the spline shaft 39 at the front end of the cylinder body 3 is connected to the inside of the injection molding machine barrel. The material is pushed through the front end of the spline shaft 39. The internal spline 42 of this application has an external power source, which can drive the internal spline 42 to rotate, and the internal spline 42 synchronously drives the spline shaft 39 to rotate.

[0040] During use, if the spline shaft 39 of the hydraulic cylinder body 3 of this application shifts and needs to be disassembled and maintained, the specific operation is as follows: Rotate the adjusting turntable 6 on the side of the injection table 1, causing the lead screw 26 to drive the displacement slide 10 to slide. The displacement slide 10 moves towards the rear end of the displacement groove 9, and the displacement slide 10 drives the hydraulic cylinder seat 2 to move, thereby adjusting the position of the hydraulic cylinder seat 2 and causing it to retract. This frees up maintenance space for the spline shaft 39 at the front end of the hydraulic cylinder seat 2. When the displacement slide 10 slides, the arc-shaped front cover 17 also moves towards the upper gear 14. At the same time, when the displacement slide 10 slides, the side plate 23 also drives the rack 24 to move towards the lower gear 12. When the toothed plate 31 in the middle of the arc-shaped front cover 17 is in contact with the upper gear 14, as the displacement slide 10 continues to move, it will press the toothed plate 31 tightly onto the upper gear 14. After the toothed plate 31 is pressed tightly... At this time, the rack 24 on the side plate 23 also begins to mesh with the lower gear 12, and then drives the lower gear 12 to rotate synchronously through the meshing of the rack 24. The lower gear 12 and the upper gear 14 are coaxially arranged, so the upper gear 14 also begins to rotate. The upper gear 14 meshes with the gear plate 31, and then drives the gear plate 31 to move in meshing, causing the entire arc-shaped front cover 17 to shift inward. In this way, the support column 18 connected to the arc-shaped front cover 17 will rotate, and then the cylinder seat 2 and the tail end of the cylinder body 3 located at the top of the support column 18 will move towards the inside of the injection table 1, while the front end of the cylinder body 3 with the spline shaft 39 can shift towards the outside of the injection table 1. In this way, the spline shaft 39 also moves towards the rear at the same time. In this way, the surrounding space at the front end of the spline shaft 39 is significantly increased, which makes it easier for the operator to disassemble and maintain the spline shaft 39 of the cylinder body 3.

[0041] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An improved injection cylinder structure, comprising an injection stand (1), a cylinder seat (2), and a cylinder body (3), characterized in that, The top of the injection stand (1) is provided with a cylinder seat (2), and the cylinder body (3) is installed inside the cylinder seat (2). One end of the cylinder body (3) is provided with a cylinder front cover (7), and the other end of the cylinder body (3) is provided with a cylinder rear cover (37). The tail end of the cylinder rear cover (37) is provided with an internal spline (42). The cylinder rear cover (37) is installed inside the cylinder rear cover (37), and the cylinder rear cover (38) is located at the center inside the cylinder body (3). The cylinder rear cover (38) is provided inside the cylinder rear cover (38), and the front end of the spline shaft (39) is pushed by a pusher. A self-aligning roller bearing (41) is fitted with a piston (40). The tail end of the splined shaft (39) is engaged with the internal spline (42). The piston (40) slides inside the piston chamber formed between the cylinder rear cover (38) and the cylinder body (3). The top of the injection stand (1) is provided with a bottom cavity (8). The bottom cavity (8) is located at the bottom of the cylinder seat (2). A displacement groove (9) is provided inside the bottom cavity (8). A displacement slide (10) is slidably arranged inside the displacement groove (9). A support column (18) is movably mounted on the top of the displacement slide (10) through a bearing. A sleeve plate (20) is fixedly fitted in the middle of the cavity (18). Side arms (21) are provided on both sides of the sleeve plate (20). A slide rod (27) is movably fitted inside the side arm (21). One end of the slide rod (27) is connected to an inner support seat (32). An arc-shaped front cover (17) is provided at the front end of the inner support seat (32). A toothed plate (31) is provided at the middle of the front end of the arc-shaped front cover (17). A lower gear (12) is movably provided on one side of the cavity (8). A support arm (11) is provided on one side of the cavity (8). An upper gear (14) is installed at the front end of the support arm (11). The bottom end of the upper gear (14) is connected to the center of the lower gear (12) via a rotating rod. The side of the displacement slide (10) is provided with a side plate (23). A rack (24) is provided at the tail end of the side plate (23). The rack (24) meshes with the side of the lower gear (12). A lead screw (26) is provided inside the displacement slide (9). The lead screw (26) is threadedly connected to the displacement slide (10). An adjusting turntable (6) is provided at the end of the injection stage (1). One end of the lead screw (26) passes through the injection stage (1) and is connected to the adjusting turntable (6).

2. The improved injection cylinder structure according to claim 1, characterized in that, The side of the bottom cavity (8) is provided with a relief groove (13), which is connected to the inside of the bottom cavity (8), and the depth of the relief groove (13) is greater than the height of the arc-shaped front cover (17).

3. The improved injection cylinder structure according to claim 1, characterized in that, The top of the support column (18) is provided with a fixed seat (19), and the side of the fixed seat (19) is provided with a fixed arm plate (15). Both the fixed seat (19) and the fixed arm plate (15) are connected to the bottom of the cylinder seat (2).

4. The improved injection cylinder structure according to claim 1, characterized in that, The bottom of the support column (18) is provided with a positioning hole (25), and a dust cover (4) is provided on the outside of the bottom cavity (8). A locking screw (5) is threadedly connected to the outer surface of the dust cover (4), and one end of the locking screw (5) passes through the dust cover (4) and is threadedly connected to the inside of the positioning hole (25).

5. The improved injection cylinder structure according to claim 1, characterized in that, The top of the inner support base (32) is provided with an installation groove (33). Two installation holes (35) are opened on both sides of the interior of the installation groove (33). A top plate (30) is installed inside the installation groove (33). The side of the top plate (30) is connected to the toothed plate (31), and the top plate (30) and the toothed plate (31) are integrally formed.

6. The improved injection cylinder structure according to claim 5, characterized in that, The top of the top plate (30) is threaded with a screw, and the screw passes through the top plate (30) and is threaded into the mounting hole (35). The inner support seat (32) has a guide groove (34) at the center of its front end. The toothed plate (31) has a guide rod (36) on its bottom inner side, and the guide rod (36) is inserted into the guide groove (34).

7. The improved injection cylinder structure according to claim 1, characterized in that, A limiting rod (22) is provided on one side of the side arm (21). One end of the limiting rod (22) is inserted into the limiting slot (16) opened on the inner wall of the bottom cavity (8). A spring (28) is provided inside the side arm (21), and the spring (28) is sleeved on the slide rod (27). Limiting collars (29) are provided on both sides of the spring (28), and the limiting collars (29) are connected to the slide rod (27).

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