Injection mold with quick ejection mechanism

Abstract

The utility model discloses an injection mold with a quick ejection mechanism, and relates to the technical field of injection molds, the injection mold comprises a machine table, four corners of the top end of the machine table are fixedly connected with supporting columns, the outer sides of the tops of the four supporting columns are jointly and fixedly connected with a fixing plate, the bottom end of the fixing plate is fixedly provided with a lifting cylinder, and the lifting cylinder is fixedly connected with a lifting mechanism. An output shaft at the bottom end of the lifting cylinder is fixedly connected with an upper die, and the top end of the machine table is fixedly connected with a lower die corresponding to the position under the upper die; a pushing assembly is arranged on the inner side of the machine table and the inner side of the lower mold and comprises a containing groove, a pushing block, a sealing ring and a spring. According to the injection mold machine table with the rapid ejection mechanism, by arranging the ejection assembly and utilizing the springback effect of the spring, an upward moving ejection force can be provided for the ejection block to eject up a model sample so as to facilitate rapid demolding, so that an additional electric driving source is not needed, the electric energy consumption is reduced, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and specifically relates to an injection mold with a quick ejection mechanism. Background Art

[0002] An injection molding machine is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting materials. Specifically, at a certain temperature, the completely molten plastic material is injected into the mold cavity under high pressure, and then the molded product is obtained after cooling and solidification. The injection molding process has many advantages such as fast production speed, high efficiency, automated operation, a variety of shapes and varieties that can be made, and precise product dimensions. Therefore, it is suitable for mass production and molding processing fields of complex-shaped products, and is one of the important processing methods;

[0003] However, during the production process of injection molds, the molded product needs to be taken out after natural heat dissipation and cooling. However, natural heat dissipation and cooling are relatively slow, which affects the production efficiency and the molding speed of plastic finished products, and external heat dissipation needs to be enhanced;

[0004] To overcome the above defects, the prior art (a Chinese patent with publication number CN221437148U and application date November 15, 2023) provides an injection mold that is easy to dissipate heat. Through the mutual cooperation of the first water pump, the water suction pipe, the cooling water tank, the cooling water pipe, the second water pump, the water return pipe and the electric fan, the purpose of accelerating heat dissipation can be achieved by using water circulation and the electric fan blowing, and the problem of slow natural heat dissipation and cooling affecting the production efficiency is solved; through the mutual cooperation of the motor, the rotating rod, the gear, the rack and the rising plate, the made mold can be ejected, achieving the purpose of facilitating the removal of the mold, thereby further improving the production efficiency of the mold;

[0005] Although the above technology can partially improve the existing equipment, in the actual working process, when demolding, a dedicated motor needs to be set as the power source for pushing the model, which will increase the power consumption and requires regular maintenance of the motor, resulting in an increase in the cost of the device;

[0006] In view of the above problems, it is urgent to innovate and design on the basis of the original equipment. Therefore, we propose an injection mold with a quick ejection mechanism that can well solve the above problems. Summary of the Utility Model

[0007] The purpose of the utility model is to provide an injection mold with a quick ejection mechanism to solve the problem in the above background art that when demolding, a dedicated motor needs to be set as the power source for pushing the model, which will increase the power consumption and requires regular maintenance of the motor, resulting in an increase in the cost of the device.

[0008] To achieve the above object, the utility model provides the following technical solution: an injection mold with a quick ejection mechanism, including a machine table, the four corners of the top of the machine table are fixedly connected with support columns, and the outer sides of the tops of the four support columns are jointly fixedly connected with a fixed plate. The bottom end of the fixed plate is fixedly installed with a lifting cylinder, and the output shaft of the bottom end of the lifting cylinder is fixedly connected with an upper mold. The top of the machine table is fixedly connected with a lower mold corresponding to the exact lower side of the upper mold.

[0009] A pushing component is arranged inside the machine table and the lower mold. The pushing component includes a receiving groove opened at the centers of the inner sides of the machine table and the lower mold. A pushing block is slidably connected inside the receiving groove. A sealing ring is fixedly connected to the inner wall of the top of the receiving groove. The top end of the pushing block is located inside the sealing ring. A spring is fixedly connected between the outer wall of the pushing block and the inner wall of the bottom end of the receiving groove. Through the rebounding effect of the spring, an upward pushing force can be provided for the pushing block to push up the molded and cooled model sample inside the lower mold, so as to facilitate quick demolding. In this way, no additional electric power driving source is required, thereby reducing the power consumption and saving the production cost.

[0010] Preferably, the outer wall of the top end of the pushing block is in close fit with the inner wall of the sealing ring, and the top end surfaces of the pushing block and the sealing ring are flush with the plane of the injection molding groove of the lower mold. Through the above settings, the sealing performance during injection molding of the upper mold and the lower mold and the flatness of the injection molded shell can be ensured.

[0011] Preferably, a clamping groove penetrating through both sides is opened on the pushing block, and a sliding clamping rod is movably clamped inside the clamping groove. The right side of the sliding clamping rod penetrates to the outside of the machine table. By inserting the sliding clamping rod into the inside of the clamping groove on the pushing block, the pushing block can be limited and fixed to keep it stable and stationary during the injection molding process.

[0012] Preferably, a circle of inclined protrusions is formed on the outer side of the pushing block below the clamping groove. The vertical height of the inclined protrusions matches the height of the clamping groove and the sliding clamping rod. This setting enables that after demolding is completed, directly moving the sliding clamping rod to the left can squeeze the pushing block downward along the inclined plane, so that the sliding clamping rod can be inserted into the inside of the clamping groove again, and the pushing block can be completely received inside the receiving groove, so as to facilitate the next injection molding operation.

[0013] Preferably, a transmission assembly is provided below the sliding clamping rod and on the right side of the upper mold. The transmission assembly includes two support seats fixedly connected to the right side wall of the machine table. A rotating rod is rotatably sleeved inside the two support seats. A first gear and a second gear are fixedly connected to the outer wall of the rotating rod. A plurality of tooth grooves are formed at the bottom end of the sliding clamping rod. The first gear meshes with the sliding clamping rod through the tooth grooves. A fixing frame is fixedly connected to the right side wall of the upper mold. A plurality of protruding teeth are formed on the right side wall of the fixing frame. When the lifting cylinder drives the upper mold to move downward, the fixing frame moves downward synchronously. The protruding teeth on the fixing frame drive the second gear to rotate counterclockwise during the downward movement. The second gear continues to drive the first gear to rotate synchronously through the connection of the rotating rod. The first gear continues to drive the sliding clamping rod to move to the left through the tooth grooves and insert into the inner side of the card slot to fix the pushing block. After the upper mold and the lower mold are closed and the injection molding is completed, the lifting cylinder drives the upper mold to lift upward, and the fixing frame moves upward synchronously. The protruding teeth on the fixing frame drive the second gear to rotate clockwise during the upward movement, and then the rightward movement of the sliding clamping rod is also realized through the connection of the rotating rod and the meshing of the first gear. In this way, the sliding clamping rod can be disengaged from the card slot. After the sliding clamping rod loses its limit on the card slot, the spring can drive the pushing block to move upward and push, so as to achieve the effect of fully automatic demoulding.

[0014] Preferably, there are two groups of the second gear and the fixing frame, and they are symmetrically distributed at both ends of the first gear. The operation stability of the transmission assembly can be effectively improved by the two groups of symmetrically distributed second gears and fixing frames.

[0015] Preferably, the distribution spacing of the protruding teeth on the fixing frame matches the distribution spacing of the tooth grooves on the sliding clamping rod to smoothly realize the synchronous meshing of the protruding teeth and the second gear, and the tooth grooves and the first gear.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this injection mold with a quick ejection mechanism, by setting up a pushing assembly and utilizing the spring-back effect of the spring, an upward pushing force can be provided for the pushing block to lift the model sample, facilitating quick demoulding. In this way, no additional electric power driving source is required, thereby reducing power consumption and saving production costs. The specific content is as follows:

[0017] (1) By setting up a pushing assembly and utilizing the spring-back effect of the spring, an upward pushing force can be provided for the pushing block to lift the model sample, facilitating quick demoulding. In this way, no additional electric power driving source is required, thereby reducing power consumption and saving production costs;

[0018] (2) By inserting the sliding clamping rod into the clamping groove on the pushing block, the pushing block can be limited and fixed, so that it remains stable and stationary during the injection molding process, ensuring the sealing performance during the injection molding of the upper mold and the lower mold and the flatness of the injection molded shell;

[0019] (3) Through the arrangement of a circular inclined protrusion formed on the outer side of the pushing block and its vertical height matching the heights of the clamping groove and the sliding clamping rod, after the demolding is completed, moving the sliding clamping rod to the left can squeeze the pushing block downward along the inclined plane, so that the sliding clamping rod can be reinserted into the inner side of the clamping groove, and the pushing block can be completely received into the inner side of the receiving groove, facilitating the next injection molding operation;

[0020] (4) By arranging a transmission assembly, when the lifting cylinder drives the upper mold to move, the fixing frame moves synchronously. The protruding teeth on the fixing frame drive the second gear to rotate during the movement. The second gear drives the first gear to rotate synchronously through the connection of the rotating rod. The first gear continues to drive the sliding clamping rod to translate through the tooth groove. In this way, the sliding clamping rod is inserted into or removed from the clamping groove, that is, the fixing and limiting of the pushing block are realized or the limiting is released, facilitating the injection molding or ejection demolding operation, and thus realizing the effect of fully automatic demolding. Description of the Drawings

[0021] Figure 1 is the front view structural schematic diagram of the whole utility model;

[0022] Figure 2 is the side view structural schematic diagram of the whole utility model;

[0023] Figure 3 is the example schematic diagram during the pushing demolding of the utility model;

[0024] Figure 4 is the internal sectional structural schematic diagram of the machine table of the utility model;

[0025] Figure 5 is the sectional structural schematic diagram of the machine table and the pushing block of the utility model;

[0026] Figure 6 is the partial structural schematic diagram of the pushing assembly and the transmission assembly of the utility model.

[0027] In the figure: 1. Machine table; 2. Support column; 3. Fixed plate; 4. Lifting cylinder; 5. Upper mold; 6. Lower mold; 7. Receiving groove; 8. Pushing block; 9. Sealing ring; 10. Spring; 11. Clamping groove; 12. Sliding clamping rod; 13. Support seat; 14. Rotating rod; 15. First gear; 16. Second gear; 17. Tooth groove; 18. Fixed frame; 19. Protruding tooth. Detailed Embodiment

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Embodiment 1: Please refer to Figures 1 - 6 , the present utility model provides the following technical solutions: An injection mold with a quick ejection mechanism, including a machine table 1, support columns 2 are fixedly connected to the four corners of the top end of the machine table 1, a fixing plate 3 is fixedly connected to the outer sides of the tops of the four support columns 2, a lifting cylinder 4 is fixedly installed at the bottom end of the fixing plate 3, the output shaft of the bottom end of the lifting cylinder 4 is fixedly connected to an upper mold 5, and a lower mold 6 is fixedly connected to the top end of the machine table 1 corresponding to the exact lower side of the upper mold 5;

[0030] A pushing assembly is arranged inside the machine table 1 and the lower mold 6. The pushing assembly includes a receiving groove 7 opened at the inner centers of the machine table 1 and the lower mold 6. A pushing block 8 is slidably connected to the inner side of the receiving groove 7. A sealing ring 9 is fixedly connected to the inner wall of the top of the receiving groove 7. The top end of the pushing block 8 is located inside the sealing ring 9, and the outer wall of the top end of the pushing block 8 is closely attached to the inner wall of the sealing ring 9. The top surfaces of the pushing block 8 and the sealing ring 9 are flush with the plane of the injection molding groove of the lower mold 6. Through the above settings, the sealing performance during the injection molding of the upper mold 5 and the lower mold 6 and the flatness of the injection molded shell can be ensured. A spring 10 is fixedly connected between the outer wall of the pushing block 8 and the inner wall of the bottom end of the receiving groove 7. Through the spring-back action of the spring 10, an upward pushing force can be provided for the pushing block 8 to push up the molded and cooled model sample inside the lower mold 6, so as to facilitate quick demolding. In this way, no additional electric drive source is required, thereby reducing power consumption and saving production costs;

[0031] At the same time, a through groove 11 is opened on both sides of the pushing block 8. A sliding clamping rod 12 is movably clamped inside the through groove 11. The right side of the sliding clamping rod 12 penetrates to the outside of the machine table 1. By inserting the sliding clamping rod 12 into the inner side of the through groove 11 on the pushing block 8, the pushing block 8 can be limited and fixed to keep it stable and stationary during the injection molding process. Among them, a ring of inclined protrusions is formed on the outside of the pushing block 8 below the through groove 11. The vertical height of the inclined protrusions matches the height of the through groove 11 and the sliding clamping rod 12. This setting enables, after demolding is completed, the sliding clamping rod 12 to be directly moved to the left to squeeze the pushing block 8 downward along the inclined plane. In this way, the sliding clamping rod 12 can be reinserted into the inner side of the through groove 11, and the pushing block 8 can be completely received inside the receiving groove 7 to facilitate the next injection molding operation.

[0032] Embodiment 2:

[0033] On the basis of the first embodiment, a transmission assembly is provided below the sliding clamping rod 12 and on the right side of the upper mold 5. The transmission assembly includes two support seats 13 fixedly connected to the right side wall of the machine table 1. A rotating rod 14 is rotatably sleeved inside the two support seats 13. An outer wall of the rotating rod 14 is fixedly connected with a first gear 15 and a second gear 16. A plurality of tooth grooves 17 are formed at a bottom end of the sliding clamping rod 12. The first gear 15 is meshed with the sliding clamping rod 12 through the tooth grooves 17. A fixing frame 18 is fixedly connected to the right side wall of the upper mold 5. Among them, there are two groups of the second gear 16 and the fixing frame 18, and they are symmetrically distributed at both ends of the first gear 15. The stable operation of the transmission assembly can be effectively improved by the two symmetrically distributed second gears 16 and the fixing frame 18. A plurality of protruding teeth 19 are formed on a right side wall of the fixing frame 18. It should be particularly noted that a distribution pitch of the protruding teeth 19 on the fixing frame 18 matches a distribution pitch of the tooth grooves 17 on the sliding clamping rod 12 to smoothly realize the synchronous meshing of the protruding teeth 19 and the second gear 16, and the tooth grooves 17 and the first gear 15. When the lifting cylinder 4 drives the upper mold 5 to move downward, the fixing frame 18 moves downward synchronously. The protruding teeth 19 on the fixing frame 18 will drive the second gear 16 to rotate counterclockwise during the downward movement. The second gear 16 continues to drive the first gear 15 to rotate synchronously through the connection of the rotating rod 14. The first gear 15 continues to drive the sliding clamping rod 12 to move to the left side through the tooth grooves 17 and insert into the inside of the clamping groove 11 to fix the pushing block 8. When the upper mold 5 and the lower mold 6 are covered and the injection molding is completed, the lifting cylinder 4 drives the upper mold 5 to lift upward, and the fixing frame 18 moves upward synchronously. The protruding teeth 19 on the fixing frame 18 drive the second gear 16 to rotate clockwise during the upward movement, and then the rightward movement of the sliding clamping rod 12 is realized through the connection of the rotating rod 14 and the meshing of the first gear 15. In this way, the sliding clamping rod 12 can be disengaged from the clamping groove 11. After the sliding clamping rod 12 loses the limit on the clamping groove 11, the spring 10 can drive the pushing block 8 to move upward to push, so as to realize the effect of fully automatic demolding.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An injection mold with a quick ejection mechanism, comprising a machine table (1). Four corners of the top end of the machine table (1) are fixedly connected with support columns (2). The outer sides of the tops of the four support columns (2) are fixedly connected with a fixing plate (3) together. A lifting cylinder (4) is fixedly installed at the bottom end of the fixing plate (3). The output shaft at the bottom end of the lifting cylinder (4) is fixedly connected with an upper mold (5). A lower mold (6) is fixedly connected to the top end of the machine table (1) corresponding to the exact lower side of the upper mold (5). It is characterized in that: A pushing component is arranged inside the machine table (1) and the lower mold (6). The pushing component includes a receiving groove (7) opened at the inner centers of the machine table (1) and the lower mold (6). A pushing block (8) is slidably connected to the inner side of the receiving groove (7). A sealing ring (9) is fixedly connected to the inner wall of the top of the receiving groove (7). The top end of the pushing block (8) is located inside the sealing ring (9). A spring (10) is fixedly connected between the outer wall of the pushing block (8) and the inner wall of the bottom end of the receiving groove (7).

2. The injection mold with a quick ejection mechanism according to claim 1, characterized in that: The outer wall of the top end of the pushing block (8) is closely attached to the inner wall of the sealing ring (9), and the top end surfaces of the pushing block (8) and the sealing ring (9) are flush with the plane of the injection molding groove of the lower mold (6).

3. The injection mold with a quick ejection mechanism according to claim 2, characterized in that: A clamping groove (11) penetrating through both sides of the pushing block (8) is opened on the pushing block (8). A sliding clamping rod (12) is movably clamped inside the clamping groove (11). The right side of the sliding clamping rod (12) penetrates to the outside of the machine table (1).

4. The injection mold with a quick ejection mechanism according to claim 3, characterized in that: A circle of inclined protrusions is formed below the clamping groove (11) on the outer side of the pushing block (8). The vertical height of the inclined protrusions matches the heights of the clamping groove (11) and the sliding clamping rod (12).

5. The injection mold with a quick ejection mechanism according to claim 4, characterized in that: A transmission component is arranged below the sliding clamping rod (12) and on the right side of the upper mold (5). The transmission component includes two support seats (13) fixedly connected to the right side wall of the machine table (1). A rotating rod (14) is rotatably sleeved inside the two support seats (13) together. A first gear (15) and a second gear (16) are fixedly connected to the outer wall of the rotating rod (14). A plurality of tooth grooves (17) are opened at the bottom end of the sliding clamping rod (12). The first gear (15) is meshed with the sliding clamping rod (12) through the tooth grooves (17). A fixing frame (18) is fixedly connected to the right side wall of the upper mold (5). A plurality of protruding teeth (19) are formed on the right side wall of the fixing frame (18).

6. The injection mold with a quick ejection mechanism according to claim 5, characterized in that: There are two groups of the second gear (16) and the fixing frame (18), and they are symmetrically distributed at both ends of the first gear (15).

7. The injection mold with a quick ejection mechanism according to claim 6, characterized in that: The distribution spacing of the protruding teeth (19) on the fixing frame (18) matches the distribution spacing of the tooth grooves (17) on the sliding clamping rod (12).

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