Back plate structure of injection molding machine

Abstract

The utility model discloses a back plate structure of an injection molding machine, which comprises a back plate fixedly connected with the injection molding machine, a hot runner plate arranged below the back plate, a support plate movably connected with the top surface of the hot runner plate, a threaded sleeve rotatably connected with the top surface of the support plate, a gear box rotatably sleeved outside the threaded sleeve, and a gear box fixed on the top surface of the support plate, a locking piece is arranged in the gear box and connected with a threaded sleeve, the interior of the threaded sleeve is in threaded connection with a threaded rod, the threaded rod is perpendicularly fixed to the bottom face of the back plate, two guide columns in mirror symmetry are perpendicularly fixed to the top face of the hot runner plate, and the two guide columns are both movably connected with the back plate. The back plate and the hot runner plate are connected through the screw and the threaded sleeve, the threaded sleeve is movably connected in the gear box through the locking piece, the locking piece composed of the helical gear and the helical tooth block has a locking and limiting effect on the screw, the threaded sleeve is prevented from being loosened from the screw due to external force, and the service life of the hot runner is prolonged. And the firmness of connection between the back plate and the hot runner plate is ensured.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to an injection molding machine backplate structure. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

[0003] Patent publication number CN210126254U discloses a support structure for use in open hot runner injection molds. The structure includes a back plate fixedly mounted on an injection molding machine, a hot runner plate mounted on the back plate, and a support device installed between the back plate and the hot runner plate for heat insulation. The support device includes a support ring and a spring washer. The spring washer is sleeved on the end of the support ring, and the end face of the spring washer is connected to the end face of the back plate. The end face of the support ring is connected to the end face of the hot runner plate. This invention, by setting a support device between the back plate and the hot runner plate, achieves heat insulation between the hot runner plate and the back plate, preventing heat loss from the hot runner plate to the back plate and making the temperature control of the hot runner plate more stable.

[0004] The patent uses bolts fitted inside the support ring to fix the hot runner plate to the back plate. However, the bolts are not self-locking and are easily affected by external vibrations, which can cause them to loosen and thus affect the firmness of the connection between the back plate and the hot runner plate. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a backplate structure for injection molding machines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a backplate structure for an injection molding machine, comprising a backplate fixedly connected to the injection molding machine, a hot runner plate provided below the backplate, a support plate movably connected to the top surface of the hot runner plate, a threaded sleeve rotatably connected to the top surface of the support plate, a gear box rotatably sleeved on the outside of the threaded sleeve, the gear box being fixed to the top surface of the support plate, a locking element provided inside the gear box, the locking element being connected to the threaded sleeve, a screw threadedly connected inside the threaded sleeve, the screw being vertically fixed to the bottom surface of the backplate, and two mirror-symmetrical guide posts vertically fixed to the top surface of the hot runner plate, both of the guide posts being movably connected to the backplate.

[0007] As a further description of the above technical solution: a groove is formed on the top surface of the hot runner plate, the support plate is movably connected in the groove, and two mirror-symmetrical clearance grooves are vertically formed on the bottom surface of the back plate. Each clearance groove is movably connected to a guide post, and an elastic member is movably connected in the clearance groove. The elastic member abuts against the top surface of the guide post.

[0008] As a further description of the above technical solution: the locking member includes a helical gear fixedly sleeved on the outside of the threaded sleeve, the helical gear being rotatably connected inside the gear box, a receiving groove being opened on the inner wall of the gear box, a helical tooth block that meshes with the helical gear being telescopically connected inside the receiving groove, and a box cover being fixedly sleeved on the outer edge of the threaded sleeve, the box cover being rotatably connected to the top surface of the gear box.

[0009] As a further description of the above technical solution: the inner wall of the storage groove has two mirror-symmetrical guide grooves horizontally formed, and a guide block is slidably connected in each guide groove. The guide block is fixedly connected to the helical tooth block. A connecting rod is horizontally fixed to the end face of the helical tooth block. The connecting rod slides axially through the storage groove. A pull block is fixedly connected to the end of the connecting rod. The pull block is fixedly connected to the connecting rod and abuts against the outside of the gear box. A second spring is sleeved on the outside of the connecting rod. The second spring abuts between the storage groove and the helical tooth block.

[0010] As a further description of the above technical solution: the elastic component includes a spring that is vertically fixed in the clearance groove, the end of the spring that is fixedly connected to a push plate, the push plate abutting against the top surface of the guide post, and two mirror-symmetrical sliding grooves that are vertically opened on the inner wall of the clearance groove, each of the sliding grooves having a slider that is slidably connected in each sliding groove, the slider being fixedly connected to the push plate.

[0011] As a further description of the above technical solution: two mirror-symmetrical sliding grooves are vertically opened on the inner wall of the groove, and a slider is slidably connected in each sliding groove, and the slider is fixedly connected to the support plate.

[0012] As a further description of the above technical solution: an annular groove is concentrically formed on the top surface of the gear box, and a limiting ring is rotatably connected inside the annular groove, the limiting ring being fixed to the bottom surface of the box cover.

[0013] This utility model has the following beneficial effects:

[0014] Compared with existing technologies, this injection molding machine backplate structure connects the backplate and the hot runner plate through a screw and a threaded sleeve. The threaded sleeve is movably connected to the gear box through a locking component. The locking component, composed of helical gears and helical tooth blocks, has a locking and limiting function on the screw, preventing the threaded sleeve from being subjected to external forces and loosening between it and the screw, thereby ensuring the firmness of the connection between the backplate and the hot runner plate. Attached Figure Description

[0015] Figure 1 This is a front view of the overall structure of the injection molding machine backplate structure proposed in this utility model;

[0016] Figure 2 This is a main sectional view of the overall structure of the injection molding machine backplate structure proposed in this utility model;

[0017] Figure 3 This is a perspective view of the connection between the helical gear and the gearbox in the back plate structure of an injection molding machine according to the present invention.

[0018] Figure 4 This is a top sectional view of the connection between the helical gear and the gearbox in the back plate structure of an injection molding machine proposed in this utility model;

[0019] Figure 5 This utility model proposes a backplate structure for an injection molding machine. Figure 2 Enlarged view of the structure at point A in the middle;

[0020] Figure 6 This utility model proposes a backplate structure for an injection molding machine. Figure 4 Enlarged view of the structure at point B.

[0021] Legend:

[0022] 1. Hot runner plate; 2. Pull block; 3. Gear box; 4. Guide post; 5. Box cover; 6. Threaded sleeve; 7. Back plate; 8. Clearance groove; 9. Helical gear; 10. Screw; 11. Groove; 12. Support plate; 13. Annular groove; 14. Spring 1; 15. Push plate; 16. Helical gear block; 17. Storage groove; 18. Spring 2; 19. Connecting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1 to 6This utility model provides a backplate structure for an injection molding machine, comprising a backplate fixedly installed on the injection molding machine, a hot runner plate installed on the backplate, and a support device installed between the backplate and the hot runner plate for heat insulation. The support device includes a support ring and a spring washer. The spring washer is sleeved on the end of the support ring, and the end face of the spring washer is connected to the end face of the backplate. The end face of the support ring is connected to the end face of the hot runner plate. By setting a support device between the backplate and the hot runner plate, this utility model achieves a heat insulation effect between the hot runner plate and the backplate, preventing heat from being conducted from the hot runner plate to the backplate and causing heat loss, thus making the temperature control of the hot runner plate more stable.

[0025] The patent uses bolts fitted inside the support ring to fix the hot runner plate to the back plate. However, the bolts are not self-locking and are easily affected by external vibrations, which can cause them to loosen and thus affect the firmness of the connection between the back plate and the hot runner plate.

[0026] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a backplate structure for injection molding machines.

[0027] To achieve the above objectives, this utility model adopts the following technical solution: a back plate structure for an injection molding machine, including a back plate 7 fixedly connected to the injection molding machine, a hot runner plate 1 provided below the back plate 7, a support plate 12 movably connected to the top surface of the hot runner plate 1, a threaded sleeve 6 rotatably connected to the top surface of the support plate 12, a gear box 3 rotatably sleeved on the outside of the threaded sleeve 6, the gear box 3 fixed to the top surface of the support plate 12, a locking element provided inside the gear box 3, the locking element being connected to the threaded sleeve 6, and the threaded sleeve 6... The internal threaded connection screw 10 is vertically fixed to the bottom surface of the back plate 7. The top surface of the hot runner plate 1 is vertically fixed with two mirror-symmetrical guide posts 4. Both guide posts 4 are movably connected to the back plate 7. The top surface of the hot runner plate 1 has a groove 11. The support plate 12 is movably connected in the groove 11. The bottom surface of the back plate 7 has two mirror-symmetrical clearance grooves 8. Each clearance groove 8 is movably connected with a guide post 4. The clearance groove 8 is movably connected with a spring member. The spring member abuts against the top surface of the guide post 4.

[0028] The locking component includes a helical gear 9 fixedly sleeved on the outside of the threaded sleeve 6. The helical gear 9 is rotatably connected inside the gear box 3. A receiving groove 17 is formed on the inner wall of the gear box 3. A helical tooth block 16 that meshes with the helical gear 9 is telescopically connected inside the receiving groove 17. Two mirror-symmetrical guide grooves are horizontally formed on the inner wall of the receiving groove 17. A guide block is slidably connected in each guide groove. The guide block is fixedly connected to the helical tooth block 16. A connecting rod 19 is horizontally fixed to the end face of the helical tooth block 16. The connecting rod 19 slides axially through the helical tooth block 16. A pull block 2 is fixedly connected to the end of the connecting rod 19 and the storage slot 17. The pull block 2 is fixedly connected to the connecting rod 19 and abuts against the outside of the gear box 3. The outer edge of the threaded sleeve 6 is fixedly sleeved with the box cover 5. The box cover 5 is rotatably connected to the top surface of the gear box 3. An annular groove 13 is concentrically opened on the top surface of the gear box 3. A limiting ring is rotatably connected inside the annular groove 13. The limiting ring is fixed to the bottom surface of the box cover 5. A spring 18 is sleeved on the outside of the connecting rod 19 and abuts between the storage slot 17 and the helical tooth block 16.

[0029] To prevent the hot runner plate 1 from increasing in heating volume and being squeezed by other components, the elastic component includes a spring 14 fixed vertically in the relief groove 8. The end of the spring 14 is fixedly connected to a push plate 15, which abuts against the top surface of the guide post 4. Two mirror-symmetrical sliding grooves 1 are vertically opened on the inner wall of the relief groove 8. A slider 1 is slidably connected in each sliding groove 1. The slider 1 is fixedly connected to the push plate 15. Two mirror-symmetrical sliding grooves 2 are vertically opened on the inner wall of the groove 11. A slider 2 is slidably connected in each sliding groove 2. The slider 2 is fixedly connected to the support plate 12.

[0030] By connecting the back plate 7 and the hot runner plate 1 through the screw 10 and the threaded sleeve 6, and by movably connecting the threaded sleeve 6 in the gear box 3 through the locking member, the locking member composed of the helical gear 9 and the helical tooth block 16 has the function of locking and limiting the screw 10, preventing the threaded sleeve 6 from being subjected to external force and loosening between it and the screw 10, thereby ensuring the firmness of the connection between the back plate 7 and the hot runner plate 1.

[0031] Working principle: In use, the threaded sleeve 6 is abutted against the stud, the guide post 4 is aligned with the clearance groove 8, and then the threaded sleeve 6 is rotated. The threaded sleeve 6 drives the cover 5 and the helical gear 9 to rotate in the gear box 3. Under the elastic action of the spring 18, the helical tooth block 16 in the receiving groove 17 inside the gear box 3 causes the helical gear 9 to rotate, driving the helical tooth block 16 to reciprocate within the receiving groove 17. When the threaded sleeve 6 is installed in place, the end face of the helical tooth block 16 abuts against the tooth end face of the helical gear 9, limiting the reverse rotation direction of the helical gear 9 and preventing the helical gear 9 from rotating in the opposite direction. To prevent the helical gear 9 from driving the threaded sleeve 6 to rotate in the opposite direction and separate from the screw 10, when the hot runner plate 1 is heated and expanded, the hot runner plate 1 moves upward, causing the support plate 12 to move into the groove 11 and the guide post 4 to move into the clearance groove 8. The guide post 4 abuts against the bottom surface of the push plate 15 and pushes the push plate 15 upward, causing the push plate 15 to drive the spring 14 to compress. When the temperature of the hot runner plate 1 drops, the spring 14 resets and pushes the push plate 15 downward. The push plate 15 pushes the guide post 4 to move downward into the clearance groove 8, and the guide post 4 drives the hot runner plate 1 to descend and return to its original position.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An injection molding machine back plate structure comprising a back plate (7) fixedly connected to an injection molding machine, characterized in that: The lower part of the backboard (7) is provided with a hot runner plate (1), the top surface of the hot runner plate (1) is movably connected with a support plate (12), the top surface of the support plate (12) is rotatably connected with a threaded sleeve (6), the outer part of the threaded sleeve (6) is rotatably sleeved with a gear box (3), the gear box (3) is fixed on the top surface of the support plate (12), the gear box (3) is provided with a locking member, the locking member is connected with the threaded sleeve (6), the inner part of the threaded sleeve (6) is threadedly connected with a screw rod (10), the screw rod (10) is vertically fixed on the bottom surface of the backboard (7), the top surface of the hot runner plate (1) is vertically fixed with two mirror-symmetrical guide columns (4), and the two guide columns (4) are movably connected with the backboard (7).

2. An injection molding machine backer plate structure as defined in claim 1, wherein: The top surface of the hot runner plate (1) is provided with a groove (11), the support plate (12) is movably connected in the groove (11), the bottom surface of the backboard (7) is vertically provided with two mirror-symmetrical avoiding grooves (8), one guide column (4) is movably connected in each avoiding groove (8), a elastic member is movably connected in the avoiding groove (8), and the elastic member abuts against the top surface of the guide column (4).

3. An injection molding machine backer plate structure as described in claim 1 wherein: The locking member comprises a bevel gear (9) fixedly sleeved on the outer part of the threaded sleeve (6), the bevel gear (9) is rotatably connected in the gear box (3), an inner wall of the gear box (3) is provided with a receiving groove (17), a bevel gear block (16) engaged with the bevel gear (9) is telescopically connected in the receiving groove (17), and an outer edge of the threaded sleeve (6) is fixedly sleeved with a box cover (5), the box cover (5) is rotatably connected on the top surface of the gear box (3).

4. An injection molding machine backer plate structure as described in claim 3 wherein: Two mirror-symmetrical guide grooves are horizontally formed in the inner wall of the receiving groove (17), one guide block is slidably connected in each guide groove, the guide block is fixedly connected with the bevel gear block (16), an end surface of the bevel gear block (16) is horizontally fixed with a connecting rod (19), the connecting rod (19) axially slides through the receiving groove (17), an end of the connecting rod (19) is fixedly connected with a pulling block (2), the pulling block (2) is fixedly connected with the connecting rod (19), the pulling block (2) abuts against the outer part of the gear box (3), the outer part of the connecting rod (19) is sleeved with a spring (18), and the spring (18) abuts between the receiving groove (17) and the bevel gear block (16).

5. An injection molding machine backer plate structure as described in claim 2 wherein: The elastic member comprises a spring (14) fixedly sleeved in the avoiding groove (8), an end of the spring (14) is fixedly connected with a push plate (15), the push plate (15) abuts against the top surface of the guide column (4), two mirror-symmetrical sliding grooves (1) are vertically formed in the inner wall of the avoiding groove (8), one sliding block (1) is slidably connected in each sliding groove (1), and the sliding block (1) is fixedly connected with the push plate (15).

6. An injection molding machine backer plate structure as described in claim 2 wherein: Two mirror-symmetrical sliding grooves (2) are vertically formed in the inner wall of the groove (11), one sliding block (2) is slidably connected in each sliding groove (2), and the sliding block (2) is fixedly connected with the support plate (12).

7. An injection molding machine backer plate structure as described in claim 3 wherein: The top surface of the gear box (3) is provided with a ring groove (13) concentrically, a limiting ring is rotatably connected in the ring groove (13), and the limiting ring is fixed to the bottom surface of the box cover (5).

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