Protective cover for screw rod of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, and discloses a protective cover for a screw of an injection molding machine, which comprises a main sleeve, two bilaterally symmetrical auxiliary sleeves are slidably arranged at the end of the main sleeve, and an adjusting device for driving the two auxiliary sleeves to slide relatively is arranged in the main sleeve. A locking component is arranged at the end, away from the main sleeve, of the auxiliary sleeve, the adjusting device comprises two lead screws rotationally arranged at the top of an inner cavity of the main sleeve, slave conical teeth are installed at the opposite ends of the two lead screws, and a rotating rod is arranged at the position, between the two lead screws, of the top of the main sleeve; the lower end of the rotating rod is provided with a main bevel gear meshed with the two auxiliary bevel gears, the upper end of the rotating rod is provided with a rotating handle, the upper end face of the main sleeve is further provided with a limiting piece used for fixing the rotating handle, and the bottom of an inner cavity of the main sleeve is provided with a transverse rod. The protective cover has the advantages that the length of the protective cover can be adjusted, and the protective cover is suitable for protecting screws with different lengths.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a protective cover for a screw of an injection molding machine. Background Art

[0002] An injection molding machine, also known as an injection molding machine or injection machine, is the primary molding equipment used to create various shapes of plastic products from thermoplastics or thermosetting plastics using plastic molding molds. Available in vertical, horizontal, and all-electric models, the injection molding machine heats the plastic and applies high pressure to the molten plastic, forcing it to eject and fill the mold cavity. The screw is one of the core components of the injection molding machine, transforming solid plastic particles or powder through the conveying section (feeding section), compression and melting section, and homogenization section into a stable, uniform plastic melt. This is then fed to the die head and auxiliary equipment to produce a product that meets product requirements.

[0003] Publication number: CN 216071136 U A screw protective cover for an injection molding machine is proposed. In this case, a first protective cover and a second protective cover are provided to protect the screw of the injection molding machine during transportation. A positioning component is provided to fix the screw of the injection molding machine. Although the protective cover can protect the screw, it cannot be applied to screws of different lengths. For longer screws, it cannot provide better protection and has poor applicability. Therefore, it is necessary to propose a protective cover for the screw of an injection molding machine to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a protective cover for the screw of an injection molding machine, which has an adjustable length and is suitable for protecting screws of different lengths.

[0005] The cam is secured to the top of the main sleeve with two cams secured to the bottom of the main sleeve, and the cam is secured to the top of the main sleeve with two cams secured to the bottom of the main sleeve.

[0006] By adopting the above technical solution, the rotating handle is turned to make the rotating rod drive the main bevel gear at the lower end to rotate, and the two slave bevel gears are pushed to rotate relative to each other through engagement, so that the screw rods on both sides rotate. Under the limit of the lower cross bar, the sliding block drives the auxiliary sleeves on both sides to slide relative to each other, thereby adjusting the length of the entire protective cover to make it suitable for the protection of screws of different lengths. After the screw is placed in the protective cover, the screw can be fixed by the locking parts on both sides, so that the protective cover has a more stable protection effect.

[0007] The utility model is further configured as follows: retaining rings are provided at both left and right ends of the inner cavity of the main sleeve, and the retaining rings are rotatably connected to the screw rod and fixedly connected to the cross bar.

[0008] By adopting the above technical solution, the screw rod can rotate stably and push the sliding block to slide smoothly.

[0009] The utility model is further configured as follows: the retaining ring is slidably connected to the auxiliary sleeve, and a sealing ring is provided on the inner side thereof to fit the outer wall of the auxiliary sleeve.

[0010] By adopting the above technical solution, the connection between the auxiliary sleeve and the retaining ring is made tighter, and the entry of impurities and dirt is reduced during the sliding adjustment process.

[0011] The present invention is further configured as follows: a fixed bin is fixedly installed at the center of the inner cavity of the main sleeve, and opposite ends of the two screw rods extend into the fixed bin and are rotatably connected thereto.

[0012] By adopting the above technical solution, the end of the screw rod can rotate smoothly when subjected to a rotational thrust, thereby improving the stability of the structure.

[0013] The present invention is further configured as follows: the limiting member includes a fixed block installed on the top of the main sleeve, a plurality of slots are equidistantly provided on the outer peripheral wall of the rotating handle, and a rebound rod extending into the slot is provided on the fixed block.

[0014] By adopting the above technical solution, after the rotary handle is rotated and adjusted, the rebound rod is inserted into the corresponding slot to fix the rotary handle and prevent it from rotating due to external force.

[0015] The utility model is further configured as follows: the rebound rod includes a movable rod that slides through the fixed block, a handle is installed at the end of the movable rod away from the rotating handle, and a connecting spring located in the fixed block and a limit block that can slide left and right are provided on the outside of the movable rod.

[0016] By adopting the above technical solution, hold the handle and pull the movable rod outward, so that the limit block squeezes the connecting spring. After the rotating handle is adjusted, release the handle, and the connecting spring will compress and rebound to make the movable rod embed into the corresponding slot, thereby fixing the position of the rotating handle.

[0017] The utility model is further configured as follows: the locking component includes a rotating frame hinged to the upper and lower sides of the end of the auxiliary sleeve, the other end of the rotating frame is equipped with a connecting rod extending into the auxiliary sleeve, the end of the connecting rod is equipped with an arc-shaped clamping frame, the outer side of which is provided with an extrusion spring, and the end of the auxiliary sleeve is also provided with a pushing device for pressing the arc-shaped clamping frame inward.

[0018] By adopting the above technical solution, the rotating frame is controlled to rotate horizontally through the pushing device, so that the connecting rod pushes the arc-shaped clamping frame to move inward, and the extrusion spring is compressed, so that the arc-shaped clamping frame fits tightly against the outer wall of the screw, thereby fixing the screw and effectively protecting it.

[0019] The present invention is further configured as follows: a bayonet for sliding of the connecting rod is provided at the end of the auxiliary sleeve, and an anti-slip pad is installed on the inner side of the arc-shaped clamping frame.

[0020] By adopting the above technical solution, the connecting rod can stably drive the arc-shaped clamping frame to press downward, and the provision of the anti-slip pad makes the fixing effect on the screw more stable.

[0021] The present invention is further configured as follows: the pushing device comprises a sleeve threadedly mounted on the end of the auxiliary sleeve, and push racks for pushing the rotating rack to rotate are provided on both upper and lower sides of the end of the sleeve.

[0022] By adopting the above technical solution, the sleeve is rotated inwardly to move the push frame inward, and the rotating frame is squeezed to rotate horizontally, thereby controlling the arc-shaped clamping frame to fix the screw.

[0023] The present invention is further configured as follows: a pressure wheel is provided at the end of the push frame and is in contact with the upper end surface of the rotating frame.

[0024] By adopting the above technical solution, during the movement of the push frame, the pressure wheel slides on the rotating frame, so that the downward pressing of the rotating frame is more stable.

[0025] The beneficial effects of the utility model are:

[0026] 1. The utility model rotates the rotary handle to drive the main bevel gear at the lower end to rotate, and drives the two slave bevel gears to rotate relative to each other through engagement, so that the screws on both sides rotate. Under the limit of the lower cross bar, the sliding block drives the auxiliary sleeves on both sides to slide relative to each other, thereby adjusting the length of the entire protective cover, making it suitable for screw protection of different lengths, making the device more applicable.

[0027] 2. The utility model rotates the sleeve inward to move the push frame inward, squeezes the rotating frame, and the connecting rod pushes the arc-shaped clamping frame inward. The extrusion spring is compressed, so that the arc-shaped clamping frame fits tightly against the outer wall of the screw, thereby fixing the screw and effectively protecting it, so that the device has a better protective effect on the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 The utility model is an overall structural diagram of a protective cover for a screw of an injection molding machine.

[0030] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle.

[0031] Figure 3 This utility model Figure 1 Enlarged view of point B in the middle

[0032] In the figure, 1. main sleeve; 2. auxiliary sleeve; 3. adjusting device; 31. screw; 32. slave bevel gear; 33. rotating rod; 34. main bevel gear; 35. rotating handle; 36. limiter; 361. fixed block; 362. movable rod; 363. handle; 364. limiter; 365. connecting spring; 37. cross bar; 38. sliding block; 4. locking component; 41. rotating frame; 42. connecting rod; 43. arc-shaped clamping frame; 44. extrusion spring; 45. pushing device; 451. sleeve; 452. pushing frame; 453. pressure wheel; 5. retaining ring; 6. fixed bin. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0034] like Figures 1 to 3As shown, a protective cover for the screw of an injection molding machine comprises a main sleeve 1, and two symmetrical auxiliary sleeves 2 are slidably provided at the end of the main sleeve 1, and an adjusting device 3 is provided in the main sleeve 1 for driving the two auxiliary sleeves 2 to slide relative to each other. The auxiliary sleeve 2 is provided with a locking component 4 at one end away from the main sleeve 1. The adjusting device 3 comprises two screw rods 31 rotatably arranged at the top of the inner cavity of the main sleeve 1, and the opposite ends of the two screw rods 31 are respectively equipped with slave bevel gears 32. The top of the main sleeve 1 is provided with a rotating rod 33 between the two screw rods 31, and the lower end of the rotating rod 33 is equipped with a main bevel gear 34 that meshes with the two slave bevel gears 32, and the upper end is provided with a rotating handle 35. The upper end surface of the main sleeve 1 is also provided with a limiter 36 for fixing the rotating handle 35, and a cross bar 37 is provided at the bottom of the inner cavity of the main sleeve 1. The end of the auxiliary sleeve 2 is provided with two sliding blocks 38 that are respectively threadedly connected to the screw rod 31 and slidably connected to the cross bar 37.

[0035] Furthermore, retaining rings 5 ​​are provided at both left and right ends of the inner cavity of the main sleeve 1 , and the retaining rings 5 ​​are rotatably connected to the screw rod 31 and fixedly connected to the cross bar 37 .

[0036] Furthermore, the retaining ring 5 is slidably connected to the auxiliary sleeve 2 , and a sealing ring 51 is provided on the inner side thereof to fit the outer wall of the auxiliary sleeve 2 .

[0037] Furthermore, a fixed bin 6 is fixedly installed at the center of the inner cavity of the main sleeve 1 , and opposite ends of the two screw rods 31 extend into the fixed bin 6 and are rotatably connected thereto.

[0038] Furthermore, the limiting member 36 includes a fixing block 361 installed on the top of the main sleeve 1 , and a plurality of slots are equidistantly provided on the outer peripheral wall of the rotating handle 35 . A rebound rod extending into the slot is provided on the fixing block 361 .

[0039] Furthermore, the rebound rod includes a movable rod 362 that slides through the fixed block 361. The movable rod 362 is equipped with a handle 363 at the end away from the rotating handle 35. The outer side of the movable rod 362 is provided with a connecting spring 365 located in the fixed block 361 and a limit block 364 that can slide left and right.

[0040] Furthermore, the locking component 4 includes a rotating frame 41 hinged to the upper and lower sides of the end of the auxiliary sleeve 2, and the other end of the rotating frame 41 is equipped with a connecting rod 42 extending into the auxiliary sleeve 2. The end of the connecting rod 42 is equipped with an arc-shaped clamping frame 43, and an extrusion spring 44 is provided on the outer side. The end of the auxiliary sleeve 2 is also provided with a pushing device 45 for pressing the arc-shaped clamping frame 43 inward.

[0041] Furthermore, a bayonet for the sliding of the connecting rod 42 is provided at the end of the auxiliary sleeve 2 , and an anti-slip pad 46 is installed on the inner side of the arc-shaped clamping frame 43 .

[0042] Furthermore, the pushing device 45 includes a sleeve 451 threadedly mounted on the end of the auxiliary sleeve 2 , and push frames 452 for pushing the rotating frame 41 to rotate are provided on both the upper and lower sides of the end of the sleeve 451 .

[0043] Furthermore, a pressure wheel 453 is provided at the end of the push frame 452 and is in contact with the upper end surface of the rotating frame 41 .

[0044] The working principle of the utility model is as follows: first, hold the handle 363 to pull the movable rod 362 outward, so that the limit block 364 squeezes the connecting spring 365, and the rotating handle 35 is disengaged from the limit. The rotating handle 35 is rotated to make the rotating rod 33 drive the main bevel gear 34 at the lower end to rotate, and the two slave bevel gears 32 are driven to rotate relative to each other through engagement, so that the screw rods 31 on both sides rotate. Under the limit of the lower cross bar 37, the sliding block 38 drives the auxiliary sleeves 2 on both sides to slide relative to each other, thereby adjusting the length of the entire protective cover. After adjustment, the end of the movable rod 362 is inserted into the slot of the rotating handle 35 through the rebound of the connecting spring 365, thereby positioning it and making the device suitable for screws of different lengths. After the screw is inserted into the protective cover, the sleeve 451 is rotated inward to move the push frame 452 inward, squeezing the rotating frame 41, and the connecting rod 42 pushes the arc-shaped clamping frame 43 to move inward. The squeezing spring 44 is compressed, so that the arc-shaped clamping frame 43 fits tightly against the outer wall of the screw, thereby fixing the screw and effectively protecting it.

Claims

1. A protective cover for an injection molding machine screw, comprising a main sleeve (1), characterized in that: The end of the main sleeve (1) is provided with two symmetrical auxiliary sleeves (2) in a sliding manner. The main sleeve (1) is provided with an adjusting device (3) for driving the two auxiliary sleeves (2) to slide relative to each other. The auxiliary sleeve (2) is provided with a locking component (4) at one end away from the main sleeve (1). The adjusting device (3) includes two screw rods (31) rotatably provided at the top of the inner cavity of the main sleeve (1). The opposite ends of the two screw rods (31) are both provided with a secondary bevel gear (32). The top of the main sleeve (1) is located between the two screw rods (31). A rotating rod (33) is provided between the screw rods (31), the lower end of the rotating rod (33) is provided with a main bevel gear (34) meshing with two slave bevel gears (32), and the upper end is provided with a rotating handle (35). The upper end surface of the main sleeve (1) is also provided with a limiter (36) for fixing the rotating handle (35), and the bottom of the inner cavity of the main sleeve (1) is provided with a cross bar (37). The end of the auxiliary sleeve (2) is provided with two sliding blocks (38) respectively connected to the screw rod (31) by thread and connected to the cross bar (37) in a sliding manner.

2. The protective cover for the screw of an injection molding machine according to claim 1, characterized in that: Both left and right ends of the inner cavity of the main sleeve (1) are provided with retaining rings (5), and the retaining rings (5) are rotatably connected to the screw rod (31) and fixedly connected to the cross bar (37).

3. The protective cover for the screw of an injection molding machine according to claim 2, characterized in that: The retaining ring (5) is slidably connected to the auxiliary sleeve (2), and a sealing ring (51) is provided on the inner side thereof and is in contact with the outer wall of the auxiliary sleeve (2).

4. The protective cover for the screw of an injection molding machine according to claim 1, characterized in that: A fixed bin (6) is fixedly installed at the center of the inner cavity of the main sleeve (1), and opposite ends of the two screw rods (31) extend into the fixed bin (6) and are rotatably connected thereto.

5. The protective cover for the screw of an injection molding machine according to claim 1, characterized in that: The limiting member (36) comprises a fixed block (361) mounted on the top of the main sleeve (1); a plurality of slots are equidistantly arranged on the outer peripheral wall of the rotating handle (35); and a rebound rod extending into the slot is provided on the fixed block (361).

6. The protective cover for the screw of an injection molding machine according to claim 5, characterized in that: The rebound rod includes a movable rod (362) that slides through a fixed block (361), and a handle (363) is installed at the end of the movable rod (362) away from the rotating handle (35). The outer side of the movable rod (362) is provided with a connecting spring (365) located in the fixed block (361) and a limit block (364) that can slide left and right.

7. The protective cover for the screw of an injection molding machine according to claim 1, characterized in that: The locking component (4) comprises a rotating frame (41) hinged to the upper and lower sides of the end of the auxiliary sleeve (2); the other end of the rotating frame (41) is equipped with a connecting rod (42) extending into the auxiliary sleeve (2); the end of the connecting rod (42) is equipped with an arc-shaped clamping frame (43) with an extrusion spring (44) sleeved on the outside; the end of the auxiliary sleeve (2) is also provided with a pushing device (45) for pressing the arc-shaped clamping frame (43) inward.

8. The protective cover for the screw of an injection molding machine according to claim 7, characterized in that: The end of the secondary sleeve (2) is provided with a bayonet for the sliding of the connecting rod (42), and the inner side of the arc-shaped clamping frame (43) is installed with an anti-slip pad (46).

9. The protective cover for the screw of an injection molding machine according to claim 8, characterized in that: The pushing device (45) comprises a sleeve (451) threadedly mounted on the end of the auxiliary sleeve (2), and push racks (452) for pushing the rotating rack (41) to rotate are provided on both upper and lower sides of the end of the sleeve (451).

10. The protective cover for the screw of an injection molding machine according to claim 9, characterized in that: The end of the push frame (452) is provided with a pressure wheel (453) that fits the upper end surface of the rotating frame (41).

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