Ejection mechanism for injection mold

Abstract

The utility model discloses an ejection mechanism for an injection mold in the field of ejection mechanisms, which comprises a mounting base, an ejection rod capable of moving telescopically is arranged in the mounting base, one end of the ejection rod penetrates through the mounting base and extends upwards, and the other end of the ejection rod is driven and controlled by a telescopic cylinder fixed in the mounting base. A plurality of protruding limiting protruding parts are arranged on the outer side of the ejector rod in the axial direction. A bearing part capable of rotating horizontally is connected in the mounting base, the bearing part is arranged on the outer side of the ejector rod in a sleeving manner, a plurality of limiting clamping grooves used for being inserted into the limiting protruding parts are formed in the inner side of the bearing part in the axial direction, and the number and the positions of the limiting clamping grooves correspond to those of the limiting protruding parts; a rotating motor is further arranged in the mounting base, the output end of the rotating motor is connected with a synchronous wheel, and the synchronous wheel and the bearing piece are in synchronous transmission through a closed-loop synchronous belt. Through the mode that the ejector rod rotates after being ejected out, the demolding efficiency can be effectively improved, manual operation is reduced, and the labor intensity is lowered.

Description

Technical Field

[0001] This utility model relates to the field of ejection mechanism technology, specifically an ejection mechanism for injection molds. Background Technology

[0002] In the field of injection mold manufacturing, the ejection mechanism is an indispensable key component. After the injection molding process is completed, the product is often tightly fitted inside the mold cavity. At this time, the ejection mechanism is needed to smoothly remove the product from the mold and push it out of the mold cavity.

[0003] However, with the continuous development of the injection molding industry and the increasing demands for production efficiency and product quality, existing ejection mechanisms have gradually revealed some significant shortcomings. On the one hand, in the demolding process, the friction between the product and the mold cavity is relatively large with a single ejection method, leading to difficulties in demolding. Manual assistance is often required to complete the demolding, which not only increases the intensity and difficulty of manual operation but also significantly reduces production efficiency. On the other hand, manual demolding is difficult to guarantee in terms of accuracy and stability, easily resulting in product damage and mold wear, seriously affecting the production efficiency and product quality of injection molds. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides an ejection mechanism for injection molds, which can effectively solve the technical problem that the ejection mechanism currently used for injection molds is inconvenient for demolding.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An ejection mechanism for an injection mold includes a mounting base, in which a telescopic ejector rod is disposed. One end of the ejector rod extends upward through the mounting base, and the other end of the ejector rod is driven and controlled by a telescopic cylinder fixed in the mounting base. A plurality of protruding limiting protrusions are provided on the outer side of the ejector rod along the axial direction.

[0007] The mounting base is connected to a horizontally rotatable bearing component. The bearing component is sleeved on the outside of the ejector rod, and a number of limiting slots for inserting the limiting protrusion are opened on the inner side of the bearing component along the axial direction. The number and position of the limiting slots correspond to the limiting protrusion.

[0008] The mounting base is also equipped with a rotating motor, the output end of which is connected to a synchronous pulley. The synchronous pulley and the bearing are synchronously driven by a closed-loop synchronous belt.

[0009] Furthermore, the ejector rod is connected to the output end of the telescopic cylinder via a kit. One end of the kit is fixed to the output end of the telescopic cylinder, and the other end of the kit is provided with a movable slot. One end of the ejector rod connected to the kit is provided with a rotating protrusion that can be inserted into the movable slot for rotation.

[0010] Furthermore, the mounting base has a mounting hole on the side where the ejector rod is pushed upward, and the outer side of the bearing component has an annular groove that connects to the mounting hole and can rotate horizontally.

[0011] Furthermore, the two ends of the limiting groove are respectively connected to the top and bottom of the bearing component.

[0012] Furthermore, the mounting base is provided with a cylinder fixing plate for fixing the telescopic cylinder and a motor mounting plate for fixing the rotating motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The ejection mechanism provided by this utility model, which rotates after being ejected by an ejector rod, can effectively improve demolding efficiency, reduce manual operation, and lower labor intensity. At the same time, the stable and reliable connection and transmission between the components ensure the accuracy and stability of the demolding operation, thereby improving the production efficiency and product quality of injection molds. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the mounting base structure according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the ejection mechanism in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the ejector rod and the telescopic cylinder in an embodiment of this utility model;

[0019] Figure 5 This is a schematic diagram of the bearing component structure according to an embodiment of the present utility model;

[0020] Numbering on the map:

[0021] 1-Mounting base, 2-Ejector rod, 3-Telescopic cylinder, 4-Bearing component, 5-Rotating motor, 6-Synchronous pulley, 7-Synchronous belt, 8-Kit;

[0022] 101-Mounting hole, 102-Cylinder mounting plate, 103-Motor mounting plate;

[0023] 201 - Limiting protrusion; 202 - Rotating protrusion;

[0024] 401 - Limiting slot; 402 - Circular slot;

[0025] 801 - Activity Card Slot. Detailed Implementation

[0026] 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.

[0027] like Figure 1-5 As shown, this utility model provides an ejection mechanism for injection molds. This ejection mechanism is mainly used for demolding operations of injection molds. After the injection molded product is ejected by the ejector rod 2, rotating the ejector rod 2 achieves rapid demolding, avoiding the need for the user to manually pull the injection molded product out of the mold. It should be noted that after the injection molded product is ejected, the user needs to hold the injection molded product while rotating the ejector rod 2.

[0028] Mounting base 1 serves as the supporting foundation for the entire ejection mechanism. It has a block-like structure and can be made of high-strength engineering plastics or metals, such as aluminum alloys, to ensure sufficient strength and stability.

[0029] The mounting base 1 has a mounting hole 101 on one side where the ejector rod 2 is pushed upward. The mounting hole 101 is used to cooperate with the bearing 4 so that the bearing 4 can rotate horizontally on the mounting base 1.

[0030] The ejector rod 2 is a telescopic rod-shaped structure made of high-hardness alloy steel to ensure strength and wear resistance during ejection. One end of the ejector rod 2 extends upward through the mounting base 1 to contact the product in the injection mold and perform the ejection operation. The other end of the ejector rod 2 is driven and controlled by a telescopic cylinder 3 fixed in the mounting base 1. The ejector rod 2 and the output end of the telescopic cylinder 3 are connected by a kit 8. One end of the kit 8 is fixed to the output end of the telescopic cylinder 3, which can be achieved by threaded connection or welding. The other end of the kit 8 has a movable slot 801. The end of the ejector rod 2 connected to the kit 8 has a rotating protrusion 202 that engages and rotates within the movable slot 801. This allows the ejector rod 2 to both telescopically move under the drive of the telescopic cylinder 3 and rotate under the drive of the bearing 4.

[0031] The telescopic cylinder 3 is fixed on the cylinder fixing plate 102 inside the mounting base 1, and its output end is fixedly connected to one end of the kit 8. The telescopic cylinder 3 is driven by compressed air or other power source, and can control the telescopic movement of the ejector rod 2 to realize the ejection and retraction actions.

[0032] The outer side of the ejector rod 2 is provided with a number of protruding limiting protrusions 201 along the axial direction. The number of limiting protrusions 201 can be set according to actual needs, and they are evenly distributed along the axial direction of the ejector rod 2. The limiting protrusions 201 facilitate use with the bearing component 4.

[0033] The bearing component 4 is a horizontally rotatable annular structure, and its material can be wear-resistant copper alloy or stainless steel. The bearing component 4 is sleeved on the outside of the ejector rod 2, and several limiting slots 401 for inserting the limiting protrusions 201 are formed axially on the inner side of the bearing component 4. The number and position of the limiting slots 401 correspond to the limiting protrusions 201. When the ejector rod 2 extends or retracts, the limiting protrusions 201 can slide within the limiting slots 401. Simultaneously, when the bearing component 4 rotates, it can drive the ejector rod 2 to rotate together. The two ends of the limiting slots 401 are respectively connected to the top and bottom of the bearing component 4, which facilitates the smooth entry and exit of the limiting protrusions 201 into and out of the limiting slots 401 during the extension and retraction of the ejector rod 2. Furthermore, the extension and retraction length can be adjusted without restriction.

[0034] The outer side of the bearing component 4 is provided with an annular groove 402 that connects to the mounting hole 101 on the mounting base 1 and can rotate horizontally. Through the cooperation between the annular groove 402 and the mounting hole 101, the bearing component 4 can rotate horizontally stably on the mounting base 1.

[0035] The mounting base 1 also houses a rotary motor 5, whose output end is connected to a synchronous pulley 6. The rotary motor 5 is electrically driven, providing power for the rotation of the bearing component 4. For better synchronous transmission, the synchronous pulley 6 and the bearing component 4 are synchronously driven by a closed-loop synchronous belt 7. The synchronous belt 7 has a precise transmission ratio, ensuring that the rotation of the rotary motor 5 is accurately transmitted to the bearing component 4, thereby driving the ejector rod 2 to rotate.

[0036] To better secure the telescopic cylinder 3 and the rotary motor 5, the mounting base 1 is equipped with a cylinder fixing plate 102 for fixing the telescopic cylinder 3 and a motor mounting plate 103 for fixing the rotary motor 5. The cylinder fixing plate 102 and the motor mounting plate 103 are firmly fixed in the mounting base 1 by bolts or welding, providing a stable mounting position for the telescopic cylinder 3 and the rotary motor 5.

[0037] During use, after the injection mold completes injection molding, a demolding operation is required. First, the telescopic cylinder 3 is activated, and its output end pushes the assembly 8. The assembly 8 drives the ejector rod 2 upward through the movable slot 801 and the rotating protrusion 202. The ejector rod 2 passes through the mounting base 1 and ejects the product from the injection mold. After the ejector rod 2 is fully ejected, the rotary motor 5 is activated, and its output end drives the synchronous wheel 6 to rotate. The synchronous wheel 6 drives the bearing 4 to rotate horizontally through the synchronous belt 7. Since the bearing 4 is sleeved on the outside of the ejector rod 2, and the limiting protrusion 201 of the ejector rod 2 is inserted into the limiting slot 401 of the bearing 4, the rotation of the bearing 4 will drive the ejector rod 2 to rotate together. During the rotation of the ejector rod 2, relative movement is generated between the product and the mold, thereby achieving rapid demolding. After demolding is completed, the telescopic cylinder 3 retracts, driving the ejector rod 2 to retract downward, returning to its initial position, waiting for the next injection molding and demolding operation.

[0038] Compared with traditional technologies, the ejection mechanism provided by this technical solution, which rotates after ejection by ejection rod 2, can effectively improve demolding efficiency, reduce manual operation, and lower labor intensity. At the same time, the mechanism has a reasonable structural design, and the connections and transmissions between components are stable and reliable, ensuring the accuracy and stability of demolding operations and improving the production efficiency and product quality of injection molds.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An ejection mechanism for injection mold, comprising a mounting base, characterized in that: a retractable ejection rod is arranged in the mounting base, one end of the ejection rod extends upward through the mounting base, the other end of the ejection rod is driven and controlled by a retractable cylinder fixed in the mounting base, and a plurality of protruding limiting protrusions are arranged on the outer side of the ejection rod in the axial direction; a horizontally rotatable bearing member is connected in the mounting base, the bearing member is sleeved on the outer side of the ejection rod, a plurality of limiting clamping grooves for inserting the limiting protrusions are arranged on the inner side of the bearing member in the axial direction, and the number and position of the limiting clamping grooves correspond to those of the limiting protrusions; a rotating motor is further arranged in the mounting base, the output end of the rotating motor is connected with a synchronous wheel, and the synchronous wheel and the bearing member are synchronously driven through a closed loop synchronous belt. The ejection rod and the output end of the retractable cylinder are connected through a sleeve, one end of the sleeve is fixed with the output end of the retractable cylinder, the other end of the sleeve is provided with a movable clamping groove, and one end of the ejection rod connected with the sleeve is provided with a rotating protrusion rotating in the movable clamping groove.

2. A mechanism for ejecting a molded article from an injection mold according to claim 1, wherein: One side of the mounting base upwardly ejecting the ejection rod is provided with a mounting hole, and the outer side of the bearing member is provided with a ring-shaped clamping groove connected with the mounting hole and horizontally rotatable.

3. A mechanism for ejecting a molded article from an injection mold according to claim 1, wherein: The limiting clamping grooves are respectively communicated with the top and bottom of the bearing member.

4. A mechanism for ejecting a molded article from an injection mold according to claim 1, wherein: The mounting base is provided with a cylinder fixing plate for fixing the retractable cylinder and a motor mounting plate for fixing the rotating motor.

5. A mechanism for ejecting a molded article from an injection mold according to claim 1, wherein: ​

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