A rapid cooling molding injection mold

Abstract

The utility model discloses a kind of injection mould of quick cooling forming, comprising: the base of ejection mechanism is installed in inside;Lower mould, lower mould is placed in the top of the base, the middle part of the lower mould is fixedly connected with mould core, the bottom of the mould core is equipped with multiple circulating water holes;Upper mould, upper mould is placed in the top of the lower mould, the bottom of the upper mould is provided with the cavity of cooperation with mould core;The beneficial effects of the utility model are: through the circulating water hole of mould core bottom and the water delivery hole on cold water plate, a spiral water cooling system of water diversion is formed;Water is introduced into the circulating water hole in the bottom of mould core by cold water pin, so that cooling water can be directly contacted with mould core, efficient heat exchange is realized, so that mould core temperature is quickly reduced, and injection molding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for rapid cooling and molding. Background Technology

[0002] Injection molds are tools used to manufacture plastic products during the injection molding process. They mainly consist of a mold core, mold cavity, and injection system. After the plastic raw material is melted by heating, the molten plastic is injected into the mold through the injection system of the injection molding machine. After cooling, it is molded into the desired product. During the use of the mold, internal cooling is crucial for improving production efficiency and ensuring product quality. The design and efficiency of the cooling system directly affect the injection molding cycle time, product dimensional accuracy, surface smoothness, and mold lifespan. Existing cooling structures are mostly direct-flow types, where cold water flows rapidly around the molding area, resulting in relatively low contact time with the mold. Furthermore, due to the relatively simple flow path of the coolant, uneven temperature distribution is easily caused in different parts of the mold. Some areas are rapidly cooled by the coolant, while other areas cool more slowly, leading to localized overheating or undercooling of the mold or product. Utility Model Content

[0003] The purpose of this invention is to provide an injection mold for rapid cooling and molding, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a rapid cooling and molding injection mold, comprising:

[0005] The base is internally equipped with an ejection and demolding mechanism;

[0006] The lower mold is placed above the base, and a mold core is fixed to the middle of the lower mold. Multiple circulating water holes are opened at the bottom of the mold core.

[0007] The upper mold is placed above the lower mold, and the bottom of the upper mold is provided with a mold cavity that mates with the mold core;

[0008] A cold water plate is placed on top of the base. The cold water plate has multiple horizontal water inlets in the middle and a vertical connecting hole at the top of the cold water plate that communicates with the water inlets. A cold water pin is installed inside the connecting hole to guide the direction of water flow in the water inlets. A spiral blade is fixed to the outside of the cold water pin to divide the circulating water holes into annular channels.

[0009] Preferably, the ejection and demolding mechanism includes a pin plate slidably installed inside the base, with a plurality of ejector pins fixed to the top of the pin plate. The ejector pins penetrate the cooling plate and are inserted into the mold core, and the ejector pins penetrate the mold core and are slidably connected to the mold core.

[0010] Preferably, the top of the cold water pin is inserted into the circulating water hole, and the bottom of the cold water pin is provided with a frustum structure for sealing the circulating water hole.

[0011] Preferably, the bottom frustum structure of the cold water pin has a water inlet hole on one side, and the water inlet hole is located inside the water delivery hole.

[0012] Preferably, the top of the cold water pin is provided with a water outlet that communicates with the water inlet, and the frustum structure of the cold water pin is provided with a drainage notch on the side facing away from the water inlet, for connecting the circulating water hole and the water delivery hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: a water-guiding spiral cooling system is formed through the circulating water holes at the bottom of the mold core and the water supply holes on the cooling plate; water is introduced into the circulating water holes at the bottom of the mold core through the cooling water pin, so that the cooling water can directly contact the mold core to achieve efficient heat exchange, thereby quickly reducing the temperature of the mold core and improving the injection molding efficiency; the spiral blades on the outside of the cooling water pin divide the circulating water holes into spiral water flow channels, prolonging the residence time of the cooling water in the mold core, increasing the heat exchange area, and further improving the cooling effect; the cooling water pin is a detachable structure, which facilitates the cleaning and maintenance of the inside of the circulating water holes; when cleaning is required, simply remove the cooling water pin, and the spiral blades can scrape and clean the inner wall of the circulating water holes to prevent blockage and scale buildup. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the upper mold of this utility model;

[0016] Figure 3 This is a schematic diagram of the lower mold of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the cooling water pin of this utility model;

[0018] Figure 5 This is a schematic diagram of the circulating water hole structure of this utility model;

[0019] Figure 6 This is a schematic diagram showing the position and structure of the connecting hole in this utility model;

[0020] Figure 7 This is a schematic diagram of the installation structure of the cooling water pin of this utility model;

[0021] Figure 8 This is a water flow path diagram for this utility model.

[0022] In the diagram: 1. Base; 2. Cold water plate; 3. Lower mold; 4. Upper mold; 5. Pin plate; 6. Ejector pin; 7. Mold core; 8. Water inlet hole; 9. Cold water pin; 10. Water inlet hole; 11. Spiral blade; 12. Water outlet hole; 13. Drainage notch; 14. Circulating water hole; 15. Connecting hole. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 , 2 As shown in Figures 3, 4, 5, 6, 7, and 8, this utility model provides a technical solution: a rapid cooling injection mold, comprising: a base 1 with an ejector mechanism installed inside; a lower mold 3 placed above a cooling water plate 2, a mold core 7 fixed to the middle of the lower mold 3 by bolts, and multiple circulating water holes 14 opened at the bottom of the mold core 7; an upper mold 4 installed above the lower mold 3, a mold cavity that mates with the mold core 7 opened at the bottom of the upper mold 4, and water supply holes opened in the middle of the upper mold 4 and around the mold cavity for cooling the mold core 7 with cold water. The cavity is cooled around the periphery. The cold water plate 2 is bolted to the top of the base 1. The lower mold 3 is bolted to the cold water plate 2. Multiple water inlets 8 are horizontally opened in the middle of the cold water plate 2. Water inlet connectors and water blowing connectors are fixed to both ends of the water inlets 8. A connecting hole 15 is vertically opened at the top of the cold water plate 2, which communicates with the water inlets 8. A cold water pin 9 is installed inside the connecting hole 15 to guide the water flow direction of the water inlets 8. A spiral blade 11 is fixed to the outside of the cold water pin 9 to divide the circulating water hole 14 into annular channels.

[0025] It should be noted that, in this embodiment, after the mold is closed, the molten plastic is injected into the mold cavity formed by the lower mold 3 and the upper mold 4 through the injection hole at the top of the upper mold 4 by the injection molding machine. The water pump injects cold water from the water inlet of the water inlet 8 through the water pipe. The water enters the cold water pin 9 from the water inlet 8 and enters the circulating water hole 14 at the bottom of the mold core 7 through the cold water pin 9. The spiral blade 11 divides the circulating water hole 14 into a spiral water flow channel, so that the water flows along the spiral water flow channel in the circulating water hole 14. During this period, the water comes into contact with the mold core 7 to achieve heat exchange, thereby cooling the mold core 7. The water flows into the water inlet 8 from one side of the bottom of the circulating water hole 14 and then flows out from one end along the water inlet 8. In this way, water can be introduced into the mold core 7 for cooling. The inside of the circulating water hole 14 can be cleaned by disassembling and replacing the cold water pin 9. When the cold water pin 9 is removed, the spiral blade 11 can scrape and clean the inner wall of the circulating water hole 14.

[0026] In one embodiment, the ejection and demolding mechanism includes a pin plate 5 slidably mounted inside the base 1. A plurality of ejector pins 6 are fixedly connected to the top of the pin plate 5. The ejector pins 6 penetrate the cold water plate 2 and are inserted into the mold core 7. The ejector pins 6 penetrate the mold core 7 and are slidably connected to the mold core 7.

[0027] It should be noted that, in this embodiment, the bottom of the base 1 is provided with a through hole, which facilitates the piston rod of the hydraulic cylinder or pneumatic cylinder to pass through the through hole and push the needle plate 5. When the lower mold 3 and the upper mold 4 are separated, the needle plate 5 is driven to slide along the guide rod in the middle of the base 1, and the needle plate 5 drives the ejector pin 6 to pass through the mold core 7. In this way, the workpiece is separated from the mold core 7 by the ejector pin 6.

[0028] In one embodiment, the top of the cold water pin 9 is inserted into the circulating water hole 14, and the bottom of the cold water pin 9 is fixed with a protrusion to limit the cold water pin 9 and prevent it from rotating. The bottom of the cold water pin 9 is provided with a frustum structure for closing the circulating water hole 14. A water inlet hole 10 is opened on one side of the frustum structure at the bottom of the cold water pin 9. The water inlet hole 10 is located in the water delivery hole 8. The top of the cold water pin 9 is provided with a water outlet hole 12 that communicates with the water inlet hole 10. A drain notch 13 is provided on the frustum structure of the cold water pin 9 on the side away from the water inlet hole 10 to connect the circulating water hole 14 and the water delivery hole 8.

[0029] It should be noted that in this embodiment, after water enters through the water supply hole 8, it enters the cold water pin 9 through the water inlet hole 10. The interior of the cold water pin 9 is a hollow structure. After entering the cold water pin 9, the water is sprayed out through the water outlet hole 12 at the top of the cold water pin 9. There is a water storage gap between the water outlet hole 12 and the top of the circulating water hole 14. After the water stays in the circulating water hole 14, it moves downward spirally along the channel formed by the spiral blade 11 and the inner wall of the circulating water hole 14, which delays the contact time between the water and the mold core 7. When the water moves to the position of the drainage gap 13, since the drainage gap 13 is connected to the bottom of the circulating water hole 14, the water enters the water supply hole 8 again through the drainage gap 13, thereby performing heat exchange and cooling on the mold core 7.

[0030] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] 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. A rapid-cooling forming injection mold characterized by: include: A base (1) with an internal ejection and demolding mechanism installed; The lower mold (3) is placed above the base (1). A mold core (7) is fixed in the middle of the lower mold (3). Multiple circulating water holes (14) are opened at the bottom of the mold core (7). The upper mold (4) is placed above the lower mold (3), and the bottom of the upper mold (4) is provided with a mold cavity that cooperates with the mold core (7); A cold water plate (2) is placed on top of the base (1). The cold water plate (2) has multiple water inlets (8) horizontally opened in the middle. The top of the cold water plate (2) has a vertically opened connecting hole (15) communicating with the water inlets (8). A cold water pin (9) for guiding the water flow direction of the water inlets (8) is installed inside the connecting hole (15). A spiral blade (11) for dividing the circulating water hole (14) into annular channels is fixed to the outside of the cold water pin (9).

2. The injection mold for rapid cooling and molding according to claim 1, characterized in that: The ejection and demolding mechanism includes a pin plate (5) slidably installed inside the base (1). A plurality of ejector pins (6) are fixedly connected to the top of the pin plate (5). The ejector pins (6) penetrate the cold water plate (2) and are inserted into the mold core (7). The ejector pins (6) penetrate the mold core (7) and are slidably connected to the mold core (7).

3. The injection mold for rapid cooling and molding according to claim 1, characterized in that: The top of the cold water pin (9) is inserted into the circulating water hole (14), and the bottom of the cold water pin (9) is provided with a frustum structure for sealing the circulating water hole (14).

4. The injection mold for rapid cooling and molding according to claim 3, characterized in that: The cold water pin (9) has a water inlet hole (10) on one side of the bottom frustum structure, and the water inlet hole (10) is located inside the water delivery hole (8).

5. The injection mold for rapid cooling and molding according to claim 4, characterized in that: The top of the cold water pin (9) is provided with an outlet hole (12) that communicates with the inlet hole (10). The cold water pin (9) has a frustum structure and a drainage notch (13) on the side away from the inlet hole (10) for connecting the circulating water hole (14) and the water delivery hole (8).

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