An injection mold with an automatic demolding mechanism

Abstract

The utility model discloses an injection mold with automatic stripping mechanism relates to injection mold technical field, including lower fixed plate and upper fixed plate, the outside of vertical board is equipped with the ram plate of sliding cover, is provided with pull rod on the pull -out board, the top surface of ram plate is provided with the ram rod of equidistance even distribution, ram rod vertical extension penetrates the bearing plate and extends to the inside of male die kernel. The utility model discloses the ingenious combination of vertical board, ram plate, pull -out board, pull rod and ram rod has realized the stripping of plastic part without setting up hydraulic system, and ram plate can move along the guide of sliding block and sliding slot under the pull of pull rod, thereby drives ram rod and ejects plastic part from male die kernel, and this design simplifies the mould structure, reduces the cost, and also improves the reliability and efficiency of stripping.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and specifically to an injection mold with an automatic demolding mechanism. Background Technology

[0002] Injection molds are precision tools used to manufacture plastic, rubber, and other plastic products. They are made of metal materials (usually steel or aluminum) and are designed with parts and cavities. Molten plastic is injected into the cavity under high temperature and pressure, and after cooling and solidification, it forms the product of the desired shape. Injection molds are widely used in many industries such as electronics, automobiles, medical, and home furnishings, and are one of the indispensable processing technologies in modern industry.

[0003] Most existing injection mold ejection systems use hydraulic systems to drive ejectors to eject plastic parts. Hydraulic systems consume a lot of energy during operation, including electrical and hydraulic energy. Under long-term operation or high-frequency use, the energy consumption problem will become more prominent.

[0004] For example, the injection mold for producing plastic disclosed in patent CN214239182U explicitly uses a hydraulic system, including a first hydraulic pump, a first hydraulic cylinder, a second hydraulic pump, and a second hydraulic cylinder, to drive the top plate and other components to demold the plastic parts. The multiple hydraulic pumps, hydraulic cylinders, and connecting components not only increase the complexity and maintenance difficulty of the system, but also make the complex hydraulic system more prone to failure, affecting production efficiency and mold life. At the same time, the maintenance and upkeep of the hydraulic system also require certain costs, including the replacement of hydraulic oil and seals.

[0005] Therefore, it is necessary to invent an injection mold with an automatic demolding mechanism to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an injection mold with an automatic demolding mechanism to solve the problem that hydraulic systems consume a lot of energy, including electrical and hydraulic energy, during operation, and the energy consumption problem becomes more prominent under long-term operation or high-frequency use.

[0007] To achieve the above object, the utility model provides the following technical solution: an injection mold with an automatic demolding mechanism, including a lower fixing plate and an upper fixing plate. At the front and rear ends above the lower fixing plate, spacer plates are provided. On the top surface of the spacer plates, a bearing plate is provided. At the center above the lower fixing plate, a vertical plate is provided. The bottom surface and the top surface of the vertical plate are respectively fixed on the top surface of the lower fixing plate and the bottom surface of the bearing plate. A ejector plate is slidably sleeved outside the vertical plate. On the left and right side walls of the upper fixing plate, pull plates are installed through bolts. A pull rod is penetrated through the pull plate. The bottom surface of the pull rod is fixed on the top surface of the ejector plate. On the top surface of the ejector plate, ejector rods are arranged in an equidistant and uniformly distributed manner. The ejector rods vertically extend through the bearing plate and extend into the internal part of the male mold core.

[0008] Preferably, guide columns are provided at the four corners above the bearing plate. The top ends of the guide columns extend to the top of the upper fixing plate and form a sliding connection with the upper fixing plate. As the guiding elements of the mold, the guide columns can guide the upper fixing plate to perform opening and closing actions along a predetermined path, ensuring the stability and guiding property of the mold during the opening and closing process.

[0009] Preferably, a pouring port is provided on the top surface of the upper fixing plate, and the feeding channel of the pouring port vertically extends and penetrates to the bottom end of the female mold core. Through the vertically extending feeding channel, it can ensure that the plastic material can directly and smoothly flow into the internal part of the female mold core.

[0010] Preferably, a female mold core is provided on the bottom surface of the upper fixing plate. A male mold core matching with the female mold core is provided directly below the female mold core, and the male mold core is installed on the top surface of the bearing plate, forming the cavity of the mold for the molding of plastic products.

[0011] Preferably, cooling water pipes are provided inside the female mold core and are located on the top surface of the bearing plate. One end of the cooling water pipe is provided with a water inlet end, and the other end of the cooling water pipe is provided with a water outlet end. Stop valves are provided on both the water inlet end and the water outlet end. By circulating cooling water through the cooling water pipes, the molding speed of the injection molded part can be accelerated.

[0012] Preferably, sliders are provided on the side walls at the front and rear ends of the ejector plate. Matching chutes are opened on the spacer plates corresponding to the side walls of the spacer plates. The sliders are designed in a "convex" shape structure. The sliders and the chutes, as the guiding elements of the ejector plate, can guide the ejector plate to move along a predetermined path, ensuring the smoothness and accuracy of the demolding action.

[0013] Preferably, there are a total of eight ejector rods. The eight ejector rods all vertically extend through the bearing plate and further extend into the internal part of the male mold core, forming a clearance fit with the through holes opened in the male mold core. And the diameter of the ejector rods matches the aperture of the through holes. The clearance fit and diameter match between the ejector rods and the through holes can ensure the smoothness and accuracy of the demolding action and achieve the uniform demolding of the plastic part.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model achieves demolding of plastic parts without the need for a separate hydraulic system through the ingenious combination of a vertical plate, an ejector plate, a pull plate, a pull rod, and an ejector rod. The ejector plate can move along the guide of the slider and the slide groove under the pull of the pull rod, thereby driving the ejector rod to push the plastic part out of the mold core. This design simplifies the mold structure, reduces costs, and also improves the reliability and efficiency of demolding.

[0016] 2. In this utility model, the cooling water pipe installed inside the female mold core allows water to flow through it from the outside. The cooling water in the cooling water pipe can quickly remove the heat generated by the male mold core, reduce the temperature of the male mold core, thereby accelerating the curing speed of the injection molded part and improving the molding efficiency of the injection molded part. This design not only shortens the production cycle but also improves production efficiency, helping enterprises to respond quickly to market demands. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall exploded three-dimensional structure of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the cooling water pipe of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the slider and groove of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the through hole of this utility model viewed from below.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Lower fixed plate; 2. Partition plate; 3. Support plate; 4. Guide post; 5. Upper fixed plate; 6. Pour gate; 7. Female mold core; 8. Male mold core; 9. Cooling water pipe; 10. Water inlet; 11. Water outlet; 12. Vertical plate; 13. Ejector plate; 14. Pull plate; 15. Pull rod; 16. Slider; 17. Slide groove; 18. Ejector rod; 19. Through hole. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model provides, for example Figure 1-5An injection mold with an automatic demolding mechanism as shown includes a lower fixed plate 1 and an upper fixed plate 5. At the front and rear ends above the lower fixed plate 1, spacer plates 2 are provided. On the top surface of the spacer plates 2, a bearing plate 3 is provided. At the center above the lower fixed plate 1, a vertical plate 12 is provided. The bottom surface and the top surface of the vertical plate 12 are respectively fixed to the top surface of the lower fixed plate 1 and the bottom surface of the bearing plate 3. A knockout plate 13 is slidably sleeved outside the vertical plate 12. On the left and right side walls of the upper fixed plate 5, pull plates 14 are installed by bolts. A pull rod 15 is penetrated through the pull plate 14. The bottom surface of the pull rod 15 is fixed to the top surface of the knockout plate 13. On the top surface of the knockout plate 13, knockout rods 18 are arranged in an equidistant and uniformly distributed manner. The knockout rods 18 vertically extend through the bearing plate 3 and extend into the internal part of the male mold core 8.

[0026] In this embodiment, through the ingenious combination of the vertical plate 12, the knockout plate 13, the pull plate 14, the pull rod 15 and the knockout rods 18, the demolding of the plastic part can be achieved without separately setting up a hydraulic system. When the mold is opened, the pull rod 15 pulls the knockout plate 13 to move upward, and the knockout rods 18 accordingly eject the plastic part from the male mold core 8.

[0027] At the four corners above the bearing plate 3, guide posts 4 are provided. The top ends of the guide posts 4 extend to the top of the upper fixed plate 5 and form a sliding connection with the upper fixed plate 5. On the top surface of the upper fixed plate 5, a pouring port 6 is provided, and the feeding channel of the pouring port 6 vertically extends and penetrates to the bottom end of the female mold core 7. On the bottom surface of the upper fixed plate 5, a female mold core 7 is provided. Directly below the female mold core 7, a male mold core 8 matching it is provided, and the male mold core 8 is installed on the top surface of the bearing plate 3. Inside the female mold core 7, a cooling water pipe 9 is provided and is located on the top surface of the bearing plate 3. One end of the cooling water pipe 9 is provided with a water inlet end 10, and the other end of the cooling water pipe 9 is provided with a water outlet end 11. Stop valves are provided on both the water inlet end 10 and the water outlet end 11.

[0028] In this embodiment, the guide posts 4 provided at the four corners above the bearing plate 3 form a sliding connection with the upper fixed plate 5, providing precise guidance for the opening and closing of the mold, ensuring the stability and guiding property of the mold during the opening and closing process. Moreover, the pouring port 6 provided on the top surface of the upper fixed plate 5 and its vertically extending feeding channel ensure that the plastic material can directly and smoothly flow into the internal part of the female mold core 7, improving the injection efficiency. And the cooling water pipe 9 provided inside the female mold core 7 effectively reduces the temperature of the male mold core 8 through circulating cooling water, accelerating the curing speed of the injection molded part and improving the molding efficiency.

[0029] Sliders 16 are provided on the side walls at the front and rear ends of the knockout plate 13. Corresponding to the side walls of the spacer plates 2, matching chutes 17 are provided. The sliders 16 are designed in a "convex" shape structure. There are a total of eight knockout rods 18. The eight knockout rods 18 all vertically extend through the bearing plate 3 and further extend into the internal part of the male mold core 8, forming a clearance fit with the through holes 19 provided in the male mold core 8, and the diameter of the knockout rods 18 matches the aperture of the through holes 19.

[0030] In this embodiment, the clearance fit and diameter matching between the ejector rod 18 and the through hole 19 in the male mold core 8 ensure that the plastic part is subjected to uniform force during demolding, avoiding deformation or damage caused by uneven force. In addition, the sliders 16 provided on the front and rear side walls of the ejector plate 13 match the grooves 17 opened on the side wall of the partition plate 2, providing precise guidance for the movement of the ejector plate 13 and ensuring smooth and accurate demolding action.

[0031] Working principle of this utility model:

[0032] Refer to the instruction manual appendix Figure 1-5 When using this utility model, firstly, before injection molding, the mold is in a closed state. The upper fixed plate 5 and the lower fixed plate 1 are tightly closed through the sliding connection of the guide post 4 to form an injection chamber. The plastic material flows directly and smoothly into the interior of the female mold core 7 through the pouring port 6 on the top surface of the upper fixed plate 5 and its vertically extending discharge channel, forming the cavity of the plastic part together with the male mold core 8. After injection molding is completed, the cooling water pipe 9 inside the female mold core 7 starts to work. External water flows into the cooling water pipe 9 through the water inlet 10 and flows out through the water outlet 11 (cooling water continues until the plastic part is completely cured in the cavity), effectively reducing the temperature of the male mold core 8 and accelerating the curing speed of the plastic material.

[0033] After the plastic part has solidified, the mold begins to open. The upper fixed plate 5 moves upward under the drive of the injection molding machine. The guide pillar 4, under the action of the sliding connection, ensures that the movement of the upper fixed plate 5 is stable and the guidance is accurate. At the same time as the mold opens, the pull plate 14 moves upward with the upper fixed plate 5. The pull rod 15 pulls the ejector plate 13 upward. During the movement of the ejector plate 13, the sliders 16 at its front and rear ends slide in the grooves 17 of the partition plate 2, providing precise guidance for the movement of the ejector plate 13 and ensuring the smooth and accurate demolding action. When the ejector plate 13 moves upward, it drives the ejector rod 18 to move together. When the ejector rod 18 moves to a certain position, its top end ejects the plastic part from the male mold core 8, realizing automatic demolding. After the operator removes the plastic part, the mold closes again, ready for the next injection cycle.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mould with automatic demoulding mechanism, comprising a lower fixed plate (1) and an upper fixed plate (5), characterised in that: At the front and rear ends above the lower fixed plate (1), spacer plates (2) are provided. On the top surface of the spacer plates (2), a bearing plate (3) is provided. At the center above the lower fixed plate (1), a vertical plate (12) is provided. The bottom surface and the top surface of the vertical plate (12) are respectively fixed on the top surface of the lower fixed plate (1) and the bottom surface of the bearing plate (3). A blanking plate (13) is slidably sleeved outside the vertical plate (12). On the left and right side walls of the upper fixed plate (5), pull plates (14) are installed by bolts. A pull rod (15) is penetrated through the pull plate (14). The bottom surface of the pull rod (15) is fixed on the top surface of the blanking plate (13). On the top surface of the blanking plate (13), blanking rods (18) are arranged at equal intervals and evenly distributed. The blanking rods (18) vertically extend through the bearing plate (3) and extend into the internal part of the male mold core (8).

2. An injection mold with automatic demolding mechanism according to claim 1, characterized in that: At the four corners above the bearing plate (3), guide columns (4) are provided. The top ends of the guide columns (4) extend to the top of the upper fixed plate (5) and form a sliding connection with the upper fixed plate (5).

3. An injection mold with automatic demolding mechanism according to claim 2, characterized in that: On the top surface of the upper fixed plate (5), a pouring port (6) is provided, and the feeding channel of the pouring port (6) vertically extends and penetrates to the bottom end of the female mold core (7).

4. An injection mold with automatic ejection mechanism according to claim 3, characterized in that: On the bottom surface of the upper fixed plate (5), a female mold core (7) is provided. Directly below the female mold core (7), a male mold core (8) which is matched with it is provided, and the male mold core (8) is installed on the top surface of the bearing plate (3).

5. An injection mold with automatic ejection mechanism according to claim 4, characterized in that: Inside the female mold core (7), a cooling water pipe (9) is provided and is located on the top surface of the bearing plate (3). One end of the cooling water pipe (9) is provided with a water inlet end (10). The other end of the cooling water pipe (9) is provided with a water outlet end (11). Stop valves are provided on both the water inlet end (10) and the water outlet end (11).

6. An injection mold with automatic ejection mechanism according to claim 1, characterized in that: On the side walls at the front and rear ends of the blanking plate (13), sliders (16) are provided. The spacer plates (2) are provided with matching sliding grooves (17) corresponding to the side walls of the spacer plates (2). The sliders (16) are designed in a "convex" shape structure.

7. The injection mold with an automatic demolding mechanism according to claim 1, wherein: There are eight blanking rods (18) in total. The eight blanking rods (18) all vertically extend through the bearing plate (3) and further extend into the internal part of the male mold core (8), forming a clearance fit with the through holes (19) opened in the male mold core (8), and the diameter of the blanking rods (18) is matched with the aperture of the through holes (19).

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