Ejecting structure of injection cup demolding device

Abstract

The utility model discloses an ejection structure of an injection molding cup demolding device, and belongs to the technical field of injection molding cup production. Comprising a movable mold base and a fixed mold base, the bottom end of the fixed mold base is fixedly connected with a base, the four corners of the fixed mold base are each fixedly provided with a guide rod, and the fixed mold base is connected with the movable mold base in an inserted and matched mode through the guide rods. Through buffering treatment of the two dampers, the phenomenon that the movable mold base collides with the fixed mold base is avoided, when the movable mold base is separated after injection molding of the cup, under the action of the reset spring, the ejector rod and the ejector disc move upwards to reset, and the automatic ejection effect of the injection cup is achieved; and the damper can slow down the reset speed of the reset spring and relieve the bearing pressure of the reset spring, and the phenomenon that the injection cup is hit when the ejection disc ejects materials is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of injection molded cup production, and more specifically, to a ejecting structure of an injection molded cup demoulding device. Background Art

[0002] Plastic cups can be used to store beverages. Injection molded cups are usually produced by injection molding using injection molding machines. After the injection mold is opened, the molded injection molded cup needs to be taken out of the mold, which requires the use of an ejector mechanism, which generally includes pneumatic and mechanical ejector mechanisms, which can eject the injection molded product from one side or bottom of the mold. The traditional mechanical ejector mechanism generally uses a return spring to force the ejector to reset, and then eject the plastic cup product from the mold. Because the return spring recovers quickly during the process of the movable mold separating from the fixed mold, the ejector will cause a certain impact on the plastic cup at the moment of contact, which will produce a certain damage rate, and when the movable mold is pressed against the fixed mold, the return spring also acts as a buffering resistance to the movable mold. In this process, the return spring's load-bearing capacity is limited, which often causes fatigue deformation of the return spring. If it is not replaced in time, the movable mold will hit the surface of the fixed mold, and the ejector cannot be completely reset, so it needs to be replaced regularly.

[0003] In view of this, we propose a ejecting structure for an injection molding cup demoulding device. Utility Model Content

[0004] The purpose of the present application is to provide a ejection structure of an injection molding cup demoulding device, which solves the technical problems in the above-mentioned background technology, and realizes that when the movable mold base and the fixed mold base in the injection molding machine are plugged and connected, the push rod pushes the cross plate and the two U-shaped plates downward along the fixed mold base, so that the ejector rod forces the ejector plate to set the end face of the cup-shaped cylinder flush, thereby realizing the molding of the injection molding cup, and the two dampers are used for buffering treatment to avoid the movable mold base hitting the fixed mold base. After the injection molding cup is injected, the movable mold base is detached, and under the action of the reset spring, the ejector rod and the ejector plate move up and reset, thereby realizing the automatic ejection effect of the injection molding cup, and the damper can slow down the resetting speed of the reset spring and reduce the bearing pressure of the reset spring, thereby achieving the technical effect of the ejection effect of the ejection cup when the ejector plate hits the injection molding cup.

[0005] The technical scheme of the application provides a material ejecting structure of an injection cup demolding device, which comprises a movable die seat and a fixed die seat, the bottom end of the fixed die seat is fixedly connected with a base, a guide rod is fixedly arranged at each corner of the fixed die seat, the fixed die seat is connected with the movable die seat through the guide rod, four push rods in square distribution are fixedly arranged on the movable die seat, the push rods are slidingly inserted into the fixed die seat, and a material ejecting assembly is connected with the bottom end of the push rods, four cup-shaped cylinders in square distribution are further fixedly arranged on the upper surface of the fixed die seat, four cup-shaped grooves in square distribution are formed in the bottom surface of the movable die seat, a plastic cup mold cavity structure is arranged between the inner walls of the cup-shaped cylinders and the cup-shaped grooves, two dampers are threadedly installed on the base, the material ejecting assembly comprises a horizontal plate, U-shaped plates are fixedly connected to the two ends of the horizontal plate, reset springs are fixedly connected between the upper surfaces of the two ends of the horizontal plate and the fixed die seat, the U-shaped plates are respectively connected with the bottom ends of the two push rods, two jacks are fixedly arranged on the U-shaped plates, top discs are fixedly arranged on the upper ends of the jacks, the top discs are slidingly connected along the upper ends of the corresponding cup-shaped cylinders, and the upper ends of the dampers are threadedly connected with one U-shaped plate through a threaded structure.

[0006] Optionally, a through hole is formed at each corner of the movable die seat, and the guide rod is slidingly inserted into the through hole.

[0007] Optionally, four insertion holes in square distribution are fixedly arranged on the fixed die seat, the push rods are slidingly inserted into the corresponding insertion holes, and the bottom ends of the push rods are connected with the U-shaped plates, a circular groove is formed in the cup-shaped cylinder, and the circular groove has a T-shaped structure in cross section, which is used for slidingly installing the top discs and the jacks.

[0008] Optionally, a guide cavity is further formed in the bottom end of the fixed die seat, the horizontal plate and the two U-shaped plates are slidingly installed in the guide cavity, and the reset springs are fixedly installed between the horizontal plate and the top surface in the guide cavity.

[0009] Optionally, a screw hole is formed at each corner of the base, and the base is threadedly connected with an injection molding machine device through a screw rod.

[0010] Optionally, the damper comprises a guide cylinder, a piston rod is slidingly installed in the guide cylinder, a buffer spring is fixedly connected between the inner cavity of the guide cylinder and the piston rod, a rectangular block is fixedly connected to the top end of the piston rod, the rectangular block is threadedly connected with the U-shaped plate through a bolt, an oval seat is fixedly arranged at the bottom end of the guide cylinder, and two inner hexagonal bolts are threadedly connected between the oval seat and the base.

[0011] One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages: when the movable mold base and the fixed mold base in the injection molding machine are plug-fitted and connected, the push rod pushes the cross plate and the two U-shaped plates downward along the fixed mold base, so that the push rod forces the top plate to set the end face of the cup-shaped cylinder flush, thereby realizing the molding of the injection molded cup. The two dampers are used for buffering treatment to avoid the movable mold base colliding with the fixed mold base. When the movable mold base is detached after the injection molding cup, the push rod and the top plate move up and reset under the action of the reset spring, thereby realizing the automatic ejection effect of the injection molded cup. The damper can slow down the resetting speed of the reset spring and reduce the bearing pressure of the reset spring, and the top plate hits the injection molded cup when ejecting the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a ejector structure of an injection molding cup demoulding device disclosed in an embodiment of the present application;

[0013] Figure 2 This is a schematic diagram of the structure of a movable mold base of a ejecting structure of an injection molding cup demoulding device disclosed in an embodiment of the present application;

[0014] Figure 3 This is a schematic diagram of the fixed mold base and base structure of the ejection structure of the injection molding cup demoulding device disclosed in an embodiment of the present application;

[0015] Figure 4 This is a schematic structural diagram of a damper and a ejection assembly of an ejection structure of an injection molding cup demoulding device disclosed in an embodiment of the present application;

[0016] Figure 5 The ejector structure of the ejector for the injection molding cup disclosed in the embodiment of the present application Figure 4 The enlarged structural diagram at B in the middle;

[0017] Explanation of the numbers in the figure: 1. Moving mold base; 11. Cup-shaped groove; 12. Push rod; 13. Through hole; 2. Fixed mold base; 21. Guide rod; 22. Socket; 23. Cup-shaped cylinder; 231. Circular groove; 24. Guide cavity; 3. Base; 31. Hexagon socket bolt; 32. Screw hole; 4. Damper; 41. Elliptical seat; 42. Guide cylinder; 43. Piston rod; 44. Buffer spring; 45. Rectangular block; 5. Ejector assembly; 51. Ejector plate; 52. Ejector rod; 53. Horizontal plate; 54. U-shaped plate; 55. Return spring. DETAILED DESCRIPTION

[0018] The present application is further described in detail below with reference to the accompanying drawings.

[0019] Reference Figures 1 to 5The embodiment of the application provides a material pushing structure of a demolding device of an injection molding cup, which comprises a movable mold base 1 and a fixed mold base 2, and is characterized in that the bottom end of the fixed mold base 2 is fixedly connected with a base 3, a guide rod 21 is fixedly arranged at each corner of the fixed mold base 2, the fixed mold base 2 is connected with the movable mold base 1 through the guide rod 21, four push rods 12 distributed in a square shape are fixedly arranged on the movable mold base 1, the push rod 12 is slidingly inserted into the fixed mold base 2, and the bottom end of the push rod 12 is connected with a material pushing assembly 5, four cup-shaped cylinders 23 distributed in a square shape are further fixedly arranged on the upper surface of the fixed mold base 2, four cup-shaped grooves 11 distributed in a square shape are formed in the bottom surface of the movable mold base 1, a plastic cup mold cavity structure is arranged between the inner walls of the cup-shaped cylinder 23 and the cup-shaped groove 11, two dampers 4 are threadedly installed on the base 3, the material pushing assembly 5 comprises a horizontal plate 53, U-shaped plates 54 are fixedly connected to the two ends of the horizontal plate 53, reset springs 55 are fixedly connected between the upper surfaces of the two ends of the horizontal plate 53 and the fixed mold base 2, the U-shaped plates 54 are respectively connected with the bottom ends of the two push rods 12, two jacks 52 are fixedly arranged on the U-shaped plates 54, a top disc 51 is fixedly arranged at the upper end of the jack 52, the top disc 51 is slidingly connected along the upper end of the corresponding cup-shaped cylinder 23, and the upper end of the damper 4 is threadedly connected with the U-shaped plate 54 through a threaded structure. The injection molding machine device drives the movable mold base 1 to be connected with the fixed mold base 2 through the four guide rods 21, so that the cup-shaped cylinder 23 is arranged in the cup-shaped groove 11, and the plastic cup mold cavity structure is formed between the cup-shaped cylinder 23 and the inner walls of the cup-shaped groove 11, which is used for injecting high-temperature plastic materials and cooling to form an injection molding cup. When the movable mold base 1 moves towards the fixed mold base 2, the push rod 12 pushes the horizontal plate 53 and the two U-shaped plates 54 to move downwards along the fixed mold base 2, and the reset spring 55 is deformed, the U-shaped plates 54 push the two jacks 52 to move downwards, the jack 52 forces the top disc 51 to move downwards to the same plane as the cup-shaped cylinder 23, and the horizontal plate 53 can be buffered by the two dampers 4 during the downward movement, so that the movable mold base 1 is prevented from colliding with the fixed mold base 2. When the movable mold base 1 is separated from the fixed mold base 2, the push rod 12 moves upwards along with the movable mold base 1, the horizontal plate 53 and the two U-shaped plates 54 move upwards under the action of the reset spring 55, the jack 52 moves the top disc 51 upwards, the injection molding cup can be pushed out, the damper 4 can slow down the reset speed of the reset spring 55, and can assist the reset spring 55 to move the horizontal plate 53 and the two U-shaped plates 54 upwards, so that the load pressure of the reset spring 55 is reduced, and the top disc 51 is prevented from hitting the injection molding cup due to the too fast material withdrawal of the injection molding cup.

[0020] Referring to Figure 2 and Figure 3 A through hole 13 is formed at each corner of the movable mold base 1, and the guide rod 21 is slidingly inserted into the through hole 13. The movable mold base 1 is slidingly displaced along the four guide rods 21 on the fixed mold base 2 through the four through holes 13.

[0021] Referring to Figure 2and Figure 3 The fixed mold base 2 is fixed with four sockets 22 distributed in a square shape. The push rod 12 is slidably inserted along the corresponding sockets 22, and the bottom end is fitted with the U-shaped plate 54. A circular groove 231 is provided in the cup-shaped cylinder 23, and the cross-section of the circular groove 231 is a T-shaped structure, which is used for slidingly installing the top plate 51 and the push rod 52. The push rod 12 moves along the corresponding sockets 22 of the fixed mold base 2, which can push the U-shaped plate 54 downward, and then the push rod 52 forces the top plate 51 to move downward to the same plane as the cup-shaped cylinder 23, thereby forming a plastic cup mold cavity structure between the cup-shaped cylinder 23 and the inner wall of the cup-shaped groove 11.

[0022] Reference Figure 3 and Figure 4 A guide cavity 24 is further provided in the bottom end of the fixed mold base 2, in which a horizontal plate 53 and two U-shaped plates 54 are slidably installed, and the reset spring 55 is fixedly installed between the horizontal plate 53 and the top surface of the guide cavity 24. The horizontal plate 53 and the two U-shaped plates 54 can be slidably installed in the guide cavity 24 through two reset springs 55. Then, when the push rod 12 moves upward and resets, under the action of the reset spring 55, the horizontal plate 53 and the two U-shaped plates 54 can be reset, and then the top plate 51 can process the injection cup top material.

[0023] Reference Figure 3 and Figure 4 A screw hole 32 is provided at each corner of the base 3, and the base 3 is threadedly connected to the injection molding machine equipment through a screw. The base 3 is threadedly connected to the injection molding machine equipment using four screws, and then the fixed mold base 2 is fixedly installed.

[0024] Reference Figure 4 and Figure 5 The damper 4 includes a guide cylinder 42, in which a piston rod 43 is slidably installed. A buffer spring 44 is fixedly connected between the inner cavity of the guide cylinder 42 and the piston rod 43. A rectangular block 45 is fixedly connected to the top of the piston rod 43. The rectangular block 45 is threadedly connected to the U-shaped plate 54 through a bolt. An elliptical seat 41 is fixedly provided at the bottom end of the guide cylinder 42. Two hexagonal bolts 31 are threadedly connected between the elliptical seat 41 and the base 3. When the piston rod 43 slides along the guide cylinder 42, due to the change in air pressure in the guide cylinder 42, the damping effect can be achieved under the action of the buffer spring 44. The damper 4 can be disassembled and then, when the damper 4 has an abnormality, it can be easily disassembled and replaced.

[0025] Working principle: The injection molding machine uses a driving device to connect the movable mold base 1 along the fixed mold base 2 through four guide rods 21, so that the cup-shaped cylinder 23 is set in the cup-shaped groove 11, and a plastic cup mold cavity structure is formed between the cup-shaped cylinder 23 and the inner wall of the cup-shaped groove 11, which is used to inject high-temperature mold materials and cool the molded injection cup. When the movable mold base 1 moves toward the fixed mold base 2, the push rod 12 pushes the cross plate 53 and the two U-shaped plates 54 to move down along the fixed mold base 2, and the reset spring 55 is deformed. The U-shaped plate 54 pushes the two push rods 52 to move down respectively. The push rods 52 force the top plate 51 to move down to the same plane as the cup-shaped cylinder 23. During the downward movement of the cross plate 53 , the two dampers 4 can be used for buffering to avoid the movable mold base 1 hitting the fixed mold base 2, and when the movable mold base 1 is separated from the fixed mold base 2, the push rod 12 moves up with the movable mold base 1, and under the action of the return spring 55, the cross plate 53 and the two U-shaped plates 54 drive the ejector rod 52 to move up, and the top plate 51 is moved up by the ejector rod 52, which can achieve the effect of ejecting the injection molded cup, and the damper 4 can slow down the speed of resetting the return spring 55, and assist the return spring 55 in driving the cross plate 53 and the two U-shaped plates 54 to move up, reducing the bearing pressure of the return spring 55, and avoiding the phenomenon that the top plate 51 hits the injection molded cup due to excessive withdrawal of the injection molded cup.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ejector structure for an injection cup demoulding device, comprising a movable mold base (1) and a fixed mold base (2), characterized in that: The bottom end of the fixed mold base (2) is fixedly connected to a base (3), and a guide rod (21) is fixedly provided at each of the four corners of the fixed mold base (2). The fixed mold base (2) is plugged and matched with the movable mold base (1) through the guide rod (21). Four push rods (12) distributed in a square are fixedly provided on the movable mold base (1). The push rods (12) are slidably plugged into the fixed mold base (2), and the bottom end pushes and connects to a material ejection assembly (5). Four cup-shaped cylinders (23) distributed in a square are also fixedly provided on the upper surface of the fixed mold base (2). Four cup-shaped grooves (11) distributed in a square are opened on the bottom surface of the movable mold base (1). A plastic cup mold cavity structure is provided between the cup-shaped cylinders (23) and the inner wall of the cup-shaped groove (11). Two dampers (4) are threadedly mounted on the base (3), and the ejector assembly (5) includes a transverse plate (53), both ends of the transverse plate (53) are fixedly connected to a U-shaped plate (54), and a return spring (55) is fixedly connected between the upper surfaces of both ends of the transverse plate (53) and the fixed mold base (2), and the U-shaped plate (54) is respectively fitted with the bottom ends of the two push rods (12), and two ejector rods (52) are fixedly provided on the U-shaped plate (54), and a top plate (51) is fixed on the upper end of the ejector rod (52), and the top plate (51) is slidably connected along the upper end of the corresponding cup-shaped cylinder (23), and the upper end of the damper (4) is threadedly connected to a U-shaped plate (54) through a threaded structure.

2. The ejecting structure of the injection molding cup demoulding device according to claim 1, characterized in that: A through hole (13) is provided at each of the four corners of the movable mold base (1), and a guide rod (21) is slidably inserted into the through hole (13).

3. The ejecting structure of the ejecting device for an injection molded cup according to claim 1, characterized in that: Four square-shaped insertion holes (22) are fixedly provided on the fixed mold base (2); the push rod (12) is slidably inserted along the corresponding insertion holes (22), and the bottom end is fitted and connected to the U-shaped plate (54); a circular groove (231) is provided in the cup-shaped cylinder (23); and the cross section of the circular groove (231) is T-shaped, which is used for slidingly installing the top plate (51) and the push rod (52).

4. The ejecting structure of the ejecting device for an injection molded cup according to claim 3, characterized in that: A guide cavity (24) is further provided in the bottom end of the fixed die seat (2), a horizontal plate (53) and two U-shaped plates (54) are slidably mounted in the guide cavity (24), and the return spring (55) is fixedly mounted between the horizontal plate (53) and the top surface of the guide cavity (24).

5. The ejecting structure of the ejecting device for an injection molded cup according to claim 1, characterized in that: A screw hole (32) is provided at each of the four corners of the base (3), and the base (3) is threadedly connected to the injection molding machine equipment via a screw rod.

6. The ejecting structure of the ejecting device for an injection molded cup according to claim 1, characterized in that: The damper (4) includes a guide cylinder (42), a piston rod (43) is slidably installed in the guide cylinder (42), a buffer spring (44) is fixedly connected between the inner cavity of the guide cylinder (42) and the piston rod (43), a rectangular block (45) is fixedly connected to the top end of the piston rod (43), and the rectangular block (45) is threadedly connected to the U-shaped plate (54) through a bolt, and an elliptical seat (41) is fixedly provided at the bottom end of the guide cylinder (42), and two hexagonal bolts (31) are threadedly connected between the elliptical seat (41) and the base (3).

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