Multi-stage ejection structure of injection mold

Abstract

The utility model relates to the technical field of ejection structures of injection molds, and discloses a multi-stage ejection structure of an injection mold. The multi-stage ejection structure of the injection mold comprises a supporting table, a rotary table, a supporting frame, an oil cylinder, a base, a mold body, a guide rod, an ejection plate and a contact plate, the rotary table is rotationally arranged on the supporting table, the supporting frame is fixedly connected to the supporting table and penetrates through the rotary table, and the oil cylinder is installed in the supporting table. Two bases are fixedly connected to the rotating disc, each base is fixedly connected with a plurality of guide rods, the guide rods are jointly provided with a mold body in a sliding mode, a top plate is arranged in each base in a sliding mode, and a contact plate is arranged on each top plate in a sliding mode. When the mold body is ejected out, due to the fact that the oil cylinder is very close to the ejector rod, almost no empty ejection distance exists during ejection, the ejection time is shortened, the whole injection molding period is shortened, and the injection molding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection mold ejection structures and discloses a multi-stage ejection structure of an injection mold. Background Art

[0002] An injection mold is a tool used in the injection molding process, primarily for manufacturing plastic products. Injection molding is a common plastics processing method that involves injecting molten plastic into a mold cavity, which then cools and solidifies to form the desired plastic product. The design and manufacture of injection molds have a significant impact on the quality and production efficiency of injection molded products.

[0003] The injection mold ejection system is a critical component in the injection molding process. Its primary function is to eject the plastic product from the mold after it cools and solidifies, facilitating removal of the finished product. However, in existing ejection systems, the turntable rotates, and the hydraulic cylinder ejector rod cannot extend beyond the turntable surface when not ejecting. This creates a long distance between the ejector rod and the mold ejection hole. Each ejection requires the ejector rod to remain in the mold for a short distance before reaching the mold and continuing to eject the product. This increases ejection time, prolongs the entire injection molding cycle, and reduces injection efficiency.

[0004] Therefore, a multi-stage ejection structure of an injection mold is needed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing ejection structure, in which the turntable needs to rotate and the cylinder ejector rod cannot exceed the turntable surface when not ejecting, so the ejector rod is at a long distance from the mold ejection hole. Each time the ejection is performed, the ejector rod must be pushed to the mold for a distance before continuing to eject the product, which increases the ejection time, prolongs the entire injection molding cycle, and thus reduces the injection molding efficiency. The utility model provides a multi-stage ejection structure for an injection mold.

[0006] The technical solution of the utility model is: a multi-stage ejection structure of an injection mold, including a support platform, a turntable, a support frame, an oil cylinder, a base, a mold body, a guide rod, a top plate, a contact plate and a support rod. The turntable is rotatably arranged on the support platform, the support frame is fixedly connected to the support platform, the support frame passes through the turntable, the oil cylinder is installed in the support platform, two bases are fixedly connected to the turntable, each base is fixedly connected to a plurality of guide rods, and the mold body is slidably arranged with the plurality of guide rods together, a top plate is slidably arranged in each base, a contact plate is slidably arranged on the top plate, two support rods are fixedly connected to each base, the top plate and the contact plate both slide on the support rods, and also include a push rod and a fixed sleeve, two fixed sleeves are arranged in the turntable, and a push rod is slidably arranged in each fixed sleeve.

[0007] Furthermore, it also includes a support plate, a rotating rod, a pressure plate, a torsion spring, a connecting disk, a limit plate, a sliding plate, a contact rod and a convex ring. Two support plates are fixedly connected to one side of the base, and the two support plates are rotatably provided with a rotating rod. A pressure plate is fixedly connected to the rotating rod, and both ends of the rotating rod are provided with a torsion spring. The two ends of the torsion spring are respectively connected to the pressure plate and the rotating rod. A connecting disk is provided on one end of the rotating rod, and a limit plate is fixedly connected to one side of the base. A sliding plate is slidably provided on the limit plate. The sliding plate can squeeze the connecting disk, and a contact rod is fixedly connected to the sliding plate. A convex ring is provided on the support frame, and the contact rod can contact the convex ring.

[0008] Furthermore, it also includes a bracket, a drive motor, a spur gear, a support ring and a gear ring. The bracket is fixedly connected to the right side of the support platform, the drive motor is installed on the bracket, the output shaft of the drive motor is connected to the spur gear, the support ring is fixedly connected to the turntable, and a gear ring is provided at the bottom of the support ring, which meshes with the spur gear.

[0009] Furthermore, a support pad is included, and a support pad is provided at the bottom of the support platform.

[0010] Furthermore, a protective shell is included. Two protective shells are provided on the rotating rod, and the torsion spring is located inside the protective shell.

[0011] Furthermore, a protective pad is included, and the protective pad is embedded inside the pressure plate.

[0012] Compared with the prior art, the utility model provides a multi-stage ejection structure for an injection mold, which has the following beneficial effects: 1. When the mold body is ejected, since the cylinder and the ejector rod are very close, there is almost no empty ejection distance during ejection, thereby reducing the ejection time, shortening the entire injection molding cycle, and improving the injection molding efficiency.

[0013] 2. During injection molding, the pressure plate limits the mold body, thereby reducing the gap between the mold body and the base, preventing air from entering the cavity during the injection molding process and causing bubbles in the material.

[0014] 3. The output shaft of the driving motor rotates to drive the spur gear. Since the ring gear is engaged with the spur gear, the ring gear rotates accordingly. The rotation of the ring gear drives the turntable to rotate, thereby achieving the purpose of automatic rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the support platform, turntable and support frame of the utility model.

[0017] Figure 3It is a three-dimensional cross-sectional view of the base, mold body and guide rod of the utility model.

[0018] Figure 4 It is a three-dimensional cross-sectional view of the oil cylinder, push rod and fixed sleeve of the utility model.

[0019] Figure 5 It is a three-dimensional cross-sectional view of the limit plate, sliding plate and contact rod of the utility model.

[0020] Figure 6 It is a three-dimensional cross-sectional view of the rotating rod, the pressing plate and the connecting disk of the utility model.

[0021] Figure 7 It is a three-dimensional cross-sectional view of the guide rod, protective shell and protective pad of the utility model.

[0022] Figure 8 It is a three-dimensional cross-sectional view of the push rod, base and guide rod of the utility model.

[0023] Figure 9 It is a three-dimensional cross-sectional view of the guide rod, top plate and contact plate of the utility model.

[0024] Figure numbers: 1: support table, 2: turntable, 3: support frame, 4: cylinder, 5: push rod, 6: fixed sleeve, 7: base, 8: mold body, 9: guide rod, 10: top plate, 11: contact plate, 12: support rod, 13: support plate, 14: rotating rod, 15: pressure plate, 16: torsion spring, 17: connecting plate, 18: limit plate, 19: sliding plate, 20: contact rod, 21: convex ring, 22: bracket, 23: drive motor, 24: spur gear, 25: support ring, 26: gear ring, 27: support pad, 28: protective shell, 29: protective pad. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1: A multi-stage ejection structure for an injection mold, see Figures 1-9, including a support platform 1, a turntable 2, a support frame 3, an oil cylinder 4, a base 7, a mold body 8, a guide rod 9, a top plate 10, a contact plate 11 and a support rod 12. The support platform 1 is rotatably provided with a turntable 2, and the support frame 3 is fixedly connected to the support platform 1. The support frame 3 passes through the turntable 2. The support platform 1 is provided with an oil cylinder 4 by bolt connection. Two bases 7 are fixedly connected to the turntable 2, and each base 7 is fixedly connected with four guide rods 9. The four guide rods 9 are slidably provided with the mold body 8 together. A top plate 10 is slidably provided in each base 7, and a contact plate 11 is slidably provided on the top plate 10. Two support rods 12 are fixedly connected to each base 7. The top plate 10 and the contact plate 11 both slide on the support rod 12. Two fixed sleeves 6 are provided in the turntable 2, and a push rod 5 is slidably provided in each fixed sleeve 6. A support pad 27 is provided at the bottom of the support platform 1 to improve stability.

[0027] When injection molding is required, the injection molding equipment is first placed on the support frame 3, and it is ensured that the injection molding equipment is correctly docked with the mold body 8. Then, the molten material is injected into the mold body 8 through the injection tube. After the injection molding is completed, the injection tube is closed and the material is allowed to cool and form in the mold. Once the material is completely cooled and formed, the oil cylinder 4 is opened and the telescopic rod of the oil cylinder 4 is controlled to extend. The telescopic rod pushes the push rod 5 upward, thereby driving the ejector plate 10 and the contact plate 11 to move upward, and finally ejecting the mold body 8. When ejecting the mold body 8, since the oil cylinder 4 and the ejector rod are very close, there is almost no empty ejection distance during ejection, which reduces the ejection time and shortens the entire injection molding cycle, thereby improving the injection molding efficiency. Finally, the cooled and formed product is removed from the mold.

[0028] Example 2: Based on Example 1, please refer to Figure 5 、 Figure 6 and Figure 7 , two support plates 13 are fixedly connected to one side of the base 7, and the two support plates 13 are rotatably provided with a rotating rod 14 together, and a pressure plate 15 is fixedly connected to the rotating rod 14. Both ends of the rotating rod 14 are sleeved with a torsion spring 16, and both ends of the torsion spring 16 are respectively connected to the pressure plate 15 and the rotating rod 14. A connecting disk 17 is provided on one end of the rotating rod 14. A limiting plate 18 is fixedly connected to one side of the base 7, and a sliding plate 19 is slidably provided on the limiting plate 18. The sliding plate 19 can squeeze the connecting disk 17, and a contact rod 20 is fixedly connected to the sliding plate 19. A convex ring 21 is provided on the support frame 3. When the contact rod 20 contacts the convex ring 21, the corresponding action can be triggered. Two protective shells 28 are provided on the rotating rod 14. The torsion spring 16 is located inside the protective shell 28 to protect the internal torsion spring 16 from being affected by external factors. A protective pad 29 is embedded in the inner side of the pressing plate 15 to reduce the wear of the mold body 8.

[0029] During injection molding, the pressure plate 15 limits the mold body 8, thereby reducing the gap between the mold body 8 and the base 7, and preventing air from entering the cavity during the injection molding process and causing bubbles in the material. After the material is cooled and formed, the turntable 2 is rotated, and the turntable 2 drives the base 7 to rotate together. When the base 7 rotates, the contact rod 20 rotates accordingly and is squeezed by the convex ring 21 and moves upward. When the contact rod 20 moves upward, it pushes the sliding plate 19 to move upward, and the sliding plate 19 squeezes the connecting plate 17 outward, thereby causing the pressure plate 15 to move outward and open, releasing the limit on the mold body 8.

[0030] See also Figure 2-Figure 5 A bracket 22 is fixedly connected to the right side of the support platform 1, and a drive motor 23 is provided on the bracket 22 by bolt connection. A spur gear 24 is connected to the output shaft of the drive motor 23, and a support ring 25 is fixedly connected to the turntable 2. A gear ring 26 is provided at the bottom of the support ring 25, and the gear ring 26 is engaged with the spur gear 24.

[0031] When the turntable 2 needs to be rotated, the drive motor 23 is started, and the output shaft of the drive motor 23 rotates to drive the spur gear 24. Since the ring gear 26 is engaged with the spur gear 24, the ring gear 26 rotates accordingly, and the rotation of the ring gear 26 drives the turntable 2 to rotate, thereby achieving the purpose of automatic rotation.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage ejection structure of an injection mold, comprising a support platform (1), a turntable (2), a support frame (3), an oil cylinder (4), a base (7), a mold body (8), a guide rod (9), a top plate (10), a contact plate (11) and a support rod (12), wherein the turntable (2) is rotatably arranged on the support platform (1), the support frame (3) is fixedly connected to the support platform (1), the support frame (3) passes through the turntable (2), the oil cylinder (4) is installed in the support platform (1), two bases (7) are fixedly connected to the turntable (2), each base (7) is fixedly connected to a plurality of guide rods (9), the mold body (8) is slidably arranged on the plurality of guide rods (9), a top plate (10) is slidably arranged in each base (7), a contact plate (11) is slidably arranged on the top plate (10), two support rods (12) are fixedly connected to each base (7), and both the top plate (10) and the contact plate (11) slide on the support rods (12), characterized in that: It also includes a push rod (5) and a fixed sleeve (6). Two fixed sleeves (6) are provided in the turntable (2), and a push rod (5) is slidably provided in each fixed sleeve (6).

2. The multi-stage ejection structure of an injection mold according to claim 1, characterized in that: The base (7) further comprises a support plate (13), a rotating rod (14), a pressure plate (15), a torsion spring (16), a connecting plate (17), a limiting plate (18), a sliding plate (19), a contact rod (20) and a convex ring (21). Two support plates (13) are fixedly connected to one side of the base (7). The two support plates (13) are rotatably provided with a rotating rod (14). The pressure plate (15) is fixedly connected to the rotating rod (14). Torsion springs (16) are sleeved on both ends of the rotating rod (14). The two ends of the spring (16) are respectively connected to the pressure plate (15) and the rotating rod (14). A connecting plate (17) is provided on one end of the rotating rod (14). A limiting plate (18) is fixedly connected to one side of the base (7). A sliding plate (19) is slidably provided on the limiting plate (18). The sliding plate (19) can squeeze the connecting plate (17). A contact rod (20) is fixedly connected to the sliding plate (19). A convex ring (21) is provided on the support frame (3). The contact rod (20) can contact the convex ring (21).

3. The multi-stage ejection structure of an injection mold according to claim 2, characterized in that: The turntable (2) further comprises a bracket (22), a drive motor (23), a spur gear (24), a support ring (25) and a gear ring (26). The right side of the support platform (1) is fixedly connected to the bracket (22), the drive motor (23) is mounted on the bracket (22), the output shaft of the drive motor (23) is connected to the spur gear (24), the turntable (2) is fixedly connected to the support ring (25), and a gear ring (26) is provided at the bottom of the support ring (25), and the gear ring (26) is meshed with the spur gear (24).

4. The multi-stage ejection structure of an injection mold according to claim 3, characterized in that: A support pad (27) is also included, and the support platform (1) is provided with a support pad (27) at the bottom.

5. The multi-stage ejection structure of an injection mold according to claim 4, characterized in that: It also includes a protective shell (28), two protective shells (28) are provided on the rotating rod (14), and the torsion spring (16) is located inside the protective shell (28).

6. The multi-stage ejection structure of an injection mold according to claim 5, characterized in that: A protective pad (29) is also included, and the protective pad (29) is embedded inside the pressing plate (15).

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