Liquid silicone rubber mold cold runner mechanism

Abstract

The utility model discloses a kind of liquid silicone mold cold runner mechanism, it is related to the technical field of silicone mold cold runner, when the cold runner is cooled, the flow of the silicone that branch enters cold flow and flows into is stable, which can cause the temperature of vulcanized silicon from inside to outside from high to low, make its temperature imbalance, to easily cause the condensation of liquid silicone that contacts with runner side wall, and adhere on the side wall of runner, thereby reduce the use efficiency of the device Problem, including runner pipe and feed pipe, the feed pipe is fixedly installed in the inside of runner pipe, and the upper and lower ends of feed pipe are respectively fixedly connected with the upper and lower ends of runner pipe, multiple cooling pipes are fixedly installed in the inside of runner pipe with equal intervals, by multiple cooling pipes being transversely arranged and being penetrated to the inside of feed pipe, the inside of liquid silicone can be effectively cooled, and the cooling of liquid silicone can be more uniform.

Description

Technical Field

[0001] This utility model relates to the technical field of cold runners for silicone molds, specifically a cold runner mechanism for liquid silicone molds. Background Technology

[0002] In the process of liquid silicone injection molding, the operation of cooling while injecting into the mold mainly targets the mold's runner system, rather than the cavity area. The core purpose of this process design is to delay the vulcanization reaction of liquid silicone in the runner, ensuring that it maintains its fluidity to fill the cavity smoothly.

[0003] A search revealed Chinese patent publication number CN223013782U, which discloses a cold runner mechanism for liquid silicone molds. This mechanism includes a guide plate for diverting liquid silicone and flow channels on the guide plate. The flow channels are arranged in an "I" shape. An inlet penetrating the guide plate is located in the middle section of each flow channel. Cooling structures are located at the ends of each flow channel, with an outlet at the top of the cooling structure. The outlet connects to the ends of the flow channels. Liquid silicone flows in from the inlet, is diverted through the flow channels, passes through the cooling structures, and is ejected from the outlet at the top of the cooling structures. The "I"-shaped flow channel design effectively improves the fluidity of the liquid silicone, ensuring product quality uniformity. The inlet directly connects to the middle section of the flow channel, accelerating the inflow of liquid silicone, shortening the molding cycle, and improving production efficiency. The cooling structures ensure that the liquid silicone reaches a suitable temperature before injection, preventing silicone solidification and further guaranteeing product quality.

[0004] However, when the cold runner is cooling down, the flow of the silicone into the cold runner is stable, which causes the temperature of the silicone to decrease from the inside to the outside, resulting in an imbalance in temperature. This makes it easy for the liquid silicone in contact with the sidewall of the runner to condense and adhere to the sidewall of the runner, thereby reducing the efficiency of the device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a liquid silicone mold cold runner mechanism. This mechanism solves the problem that during cooling, the flow of silicone into the cold runner is stable, leading to a temperature imbalance where the temperature of the silicone desulfurized material decreases from high to low from the inside out. This imbalance easily causes the liquid silicone in contact with the runner sidewall to condense and adhere to the sidewall, thus reducing the efficiency of the device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cold runner mechanism for a liquid silicone mold, comprising a runner pipe and a feed pipe. The feed pipe is fixedly installed inside the runner pipe, and its upper and lower ends are respectively fixedly connected to the upper and lower ends of the runner pipe. Multiple cooling pipes are fixedly installed at equal intervals inside the runner pipe. The two ends of each cooling pipe penetrate through the side walls of both ends of the runner pipe and extend to the outside of the runner pipe. The feed pipes are respectively fixedly sleeved on the outside of the cooling pipes. The side walls of the cooling pipes are respectively sealed to the side walls of the runner pipe and the feed pipe. An injection pipe is fixedly installed at the upper end of the runner pipe, and the lower end of the injection pipe penetrates through the inside of the runner pipe and extends into the inside of the feed pipe.

[0007] Preferably, a first connecting pipe and a second connecting pipe are fixedly connected to both ends of the cooling pipe, and a water inlet pipe is fixedly installed at the right end of the first connecting pipe. The water inlet pipe is fixedly connected to an external water source pipe. A water tank is provided between the flow channel pipe and the feed pipe. Water outlet holes are symmetrically arranged inside the upper side wall of the cooling pipe. The water outlet holes are symmetrically arranged on both sides of the water tank, so as to facilitate water entering the interior of the water tank and also allow water to pass through the interior of the cooling pipe.

[0008] Preferably, a first drain pipe is fixedly installed inside the side wall of the second connecting pipe, and a second drain pipe is fixedly installed inside the left side wall of the flow channel pipe. The lower end of the first drain pipe is fixedly connected to the upper end of the second drain pipe and communicates with the interior of the second drain pipe, thereby facilitating the discharge of water.

[0009] Preferably, a rotary motor is fixedly installed at the upper end of the flow channel tube, and a spiral rod is rotatably connected inside the upper side wall of the feed tube and passes through the side wall of the flow channel tube. The output shaft of the rotary motor passes through the side wall of the flow channel tube and is fixedly connected to the upper end of the spiral rod. The spiral rod is located at the upper end of the cooling tube, thereby facilitating the tumbling of liquid silicone inside the feed tube.

[0010] Preferably, a heat dissipation plate is symmetrically fixedly installed on the inner side wall of the flow channel pipe. The heat dissipation plate is located inside the water tank. Multiple heat dissipation fins are fixedly installed at equal intervals on the side wall of the heat dissipation plate. The heat dissipation fins pass through the inside of the side wall of the flow channel pipe and extend to the outside of the flow channel pipe. The heat dissipation fins are sealed and fixedly connected to the inside of the side wall of the flow channel pipe, thereby facilitating the dissipation of water in the water tank.

[0011] Preferably, a discharge pipe is fixedly installed at the lower end of the flow channel tube, and the discharge pipe is conical. The interior of the discharge pipe is connected to the interior of the feed pipe. The bottom of the feed pipe is open, and its sidewall is sealed to the inner sidewall of the flow channel tube, thereby facilitating the injection of material into the mold.

[0012] This invention provides a cold runner mechanism for liquid silicone molds. It offers the following advantages:

[0013] 1. The liquid silicone mold cold runner mechanism, when using the liquid silicone mold cold runner mechanism, through multiple horizontally arranged cooling pipes penetrating into the inside of the feed pipe, can effectively dissipate heat from the inside of the liquid silicone, and can make the heat dissipation of the liquid silicone more uniform.

[0014] 2. The liquid silicone mold cold runner mechanism, when used, can effectively dissipate heat from the inside of the water tank through the cooperation between the heat dissipation plate and the heat dissipation fins, preventing the heat absorbed by the water from not being dissipated in time. Attached Figure Description

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

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a schematic diagram of the cooling pipe structure of this utility model.

[0019] In the diagram, 1 is the flow channel pipe; 2 is the feed pipe; 3 is the rotary motor; 4 is the screw rod; 5 is the injection pipe; 6 is the water inlet pipe; 7 is the first connecting pipe; 8 is the cooling pipe; 9 is the second connecting pipe; 10 is the first drain pipe; 11 is the second drain pipe; 12 is the discharge pipe; 13 is the water tank; 14 is the heat sink; 15 is the heat sink fin; and 16 is the water outlet. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-4This utility model provides a cold runner mechanism for a liquid silicone mold, including a runner pipe 1 and a feed pipe 2. The feed pipe 2 is fixedly installed inside the runner pipe 1, and its upper and lower ends are respectively fixedly connected to the upper and lower ends of the runner pipe 1. Multiple cooling pipes 8 are fixedly installed at equal intervals inside the runner pipe 1. The two ends of the cooling pipes 8 penetrate through the side walls of both ends of the runner pipe 1 and extend to the outside of the runner pipe 1. The feed pipes 2 are respectively fixedly sleeved on the outside of the cooling pipes 8, and the side walls of the cooling pipes 8 are respectively sealed to the side walls of the runner pipe 1 and the feed pipe 2. An injection pipe 5 is fixedly installed at the upper end of the runner pipe 1, and the lower end of the injection pipe 5 penetrates through the interior of the runner pipe 1 and extends to the feed pipe 2. Inside the tube 2, the lower end of the flow channel tube 1 is fixedly installed with a discharge tube 12, which is tapered. The interior of the discharge tube 12 is connected to the interior of the feed tube 2. The bottom of the feed tube 2 is open, and its side wall is sealed to the inner side wall of the flow channel tube 1. Liquid silicone is injected into the interior of the feed tube 2 through the injection tube 5. At the same time, the rotary motor 3 is turned on, causing the screw rod 4 to rotate and drive the liquid silicone downward. This allows the liquid silicone to move from the inside out and flow to the cooling tube inside the feed tube 2. The liquid silicone can then pass through the side wall of the cooling tube 8 to effectively dissipate heat evenly inside the liquid silicone. Finally, it is injected into the interior of the mold through the discharge tube 12.

[0022] To enhance internal heat dissipation efficiency, in this embodiment, as follows: Figure 1-4As shown, a first connecting pipe 7 and a second connecting pipe 9 are fixedly connected to both ends of the cooling pipe 8. A water inlet pipe 6 is fixedly installed at the right end of the first connecting pipe 7 and is fixedly connected to an external water source pipe. A water tank 13 is provided between the flow channel pipe 1 and the feed pipe 2. Water outlet holes 16 are symmetrically arranged inside the upper side wall of the cooling pipe 8, and the water outlet holes 16 are symmetrically arranged on both sides of the water tank 13. A first drain pipe 10 is fixedly installed inside the side wall of the second connecting pipe 9. A first drain pipe 10 is fixed inside the left side wall of the flow channel pipe 1. A second drain pipe 11 is installed. The lower end of the first drain pipe 10 is fixedly connected to the upper end of the second drain pipe 11 and communicates with the interior of the second drain pipe 11. A rotary motor 3 is fixedly installed at the upper end of the flow channel pipe 1. A screw rod 4 is rotatably connected to the interior of the upper side wall of the feed pipe 2 and passes through the interior of the side wall of the flow channel pipe 1. The output shaft of the rotary motor 3 passes through the interior of the side wall of the flow channel pipe 1 and is fixedly connected to the upper end of the screw rod 4. The screw rod 4 is located at the upper end of the cooling pipe 8. The interior of the flow channel pipe 1... A heat dissipation plate 14 is symmetrically fixedly installed on the side wall of the water tank 13. The heat dissipation plate 14 is set inside the water tank 13. Multiple heat dissipation fins 15 are fixedly installed at equal intervals on the side wall of the heat dissipation plate 14. The heat dissipation fins 15 pass through the inside of the side wall of the flow channel pipe 1 and extend to the outside of the flow channel pipe 1. The heat dissipation fins 15 and the inside of the side wall of the flow channel pipe 1 are sealed and fixedly connected. While injecting liquid silicone, water flows into the inside of the first connecting pipe 7 through the water inlet pipe 6 and branches into the inside of the cooling pipe 8. When the water passes through the water outlet holes 16 on both sides of the cooling pipe 8, the water overflows into the inside of the water tank 13 through the inside of the water outlet holes 16, which facilitates the cooling of the liquid silicone in the feed pipe 2. At the same time, the water absorbs the heat of the liquid silicone. At this time, under the action of the heat dissipation plate 14 and the heat dissipation fins 15, the heat in the water can be easily discharged. Then the water in the cooling pipe 8 enters the inside of the second drain pipe 11 through the first drain pipe 10, and the water in the water tank 13 is discharged through the second drain pipe 11.

[0023] It should be noted that, in this embodiment, as Figure 1-4As shown, liquid silicone is injected into the feed pipe 2 through the injection pipe 5. Simultaneously, the rotary motor 3 is turned on, causing the screw rod 4 to rotate, moving the liquid silicone downwards. This allows the liquid silicone to move from the inside out and flow onto the cooling pipe 8 inside the feed pipe 2. The cooling pipe 8 effectively dissipates heat evenly from the inside of the liquid silicone through its side wall. Finally, it is injected into the mold through the discharge pipe 12. Simultaneously, water flows into the first connecting pipe 7 through the water inlet pipe 6. The branch enters the interior of the cooling pipe 8. When the water passes through the outlet holes 16 on both sides of the cooling pipe 8, the water overflows into the water tank 13 through the outlet holes 16, which facilitates the cooling of the liquid silicone in the feed pipe 2. At the same time, the water absorbs the heat of the liquid silicone. At this time, under the action of the heat sink 14 and the heat sink 15, the heat in the water can be easily discharged. Then the water in the cooling pipe 8 flows into the interior of the second drain pipe 11 through the first drain pipe 10, and the water in the water tank 13 is discharged through the second drain pipe 11.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model 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 basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cold runner mechanism for a liquid silicone mold, characterized in that: The device includes a flow channel (1) and a feed pipe (2). The feed pipe (2) is fixedly installed inside the flow channel (1), and the upper and lower ends of the feed pipe (2) are fixedly connected to the upper and lower ends of the flow channel (1), respectively. Multiple cooling pipes (8) are fixedly installed at equal intervals inside the flow channel (1). The two ends of the cooling pipes (8) pass through the two side walls of the flow channel (1) and extend to the outside of the flow channel (1), respectively. The feed pipes (2) are fixedly sleeved on the outside of the cooling pipes (8). The side walls of the cooling pipes (8) are sealed to the side walls of the flow channel (1) and the feed pipes (2), respectively. An injection pipe (5) is fixedly installed at the upper end of the flow channel (1). The lower end of the injection pipe (5) passes through the inside of the flow channel (1) and extends to the inside of the feed pipe (2).

2. The liquid silicone mold cold runner mechanism according to claim 1, characterized in that: The cooling pipe (8) is fixedly connected to a first connecting pipe (7) and a second connecting pipe (9) at both ends. A water inlet pipe (6) is fixedly installed at the right end of the first connecting pipe (7). The water inlet pipe (6) is fixedly connected to an external water source pipe. A water tank (13) is provided between the flow channel pipe (1) and the feed pipe (2). Water outlet holes (16) are symmetrically provided inside the upper side wall of the cooling pipe (8). The water outlet holes (16) are symmetrically provided on both sides of the water tank (13).

3. The liquid silicone mold cold runner mechanism according to claim 2, characterized in that: The second connecting pipe (9) has a first drain pipe (10) fixedly installed inside its side wall, and the flow channel pipe (1) has a second drain pipe (11) fixedly installed inside its left side wall. The lower end of the first drain pipe (10) is fixedly connected to the upper end of the second drain pipe (11) and communicates with the interior of the second drain pipe (11).

4. The liquid silicone mold cold runner mechanism according to claim 1, characterized in that: A rotary motor (3) is fixedly installed at the upper end of the flow channel (1). A screw rod (4) is rotatably connected inside the upper side wall of the feed pipe (2) and passes through the side wall of the flow channel (1). The output shaft of the rotary motor (3) passes through the side wall of the flow channel (1) and is fixedly connected to the upper end of the screw rod (4). The screw rod (4) is located at the upper end of the cooling pipe (8).

5. The liquid silicone mold cold runner mechanism according to claim 2, characterized in that: A heat sink plate (14) is symmetrically fixedly installed on the inner side wall of the flow channel pipe (1). The heat sink plate (14) is located inside the water tank (13). A plurality of heat sink fins (15) are fixedly installed at equal intervals on the side wall of the heat sink plate (14). The heat sink fins (15) penetrate through the inside of the side wall of the flow channel pipe (1) and extend to the outside of the flow channel pipe (1). The heat sink fins (15) are sealed and fixedly connected to the inside of the side wall of the flow channel pipe (1).

6. The liquid silicone mold cold runner mechanism according to claim 1, characterized in that: The lower end of the flow channel (1) is fixedly installed with a discharge pipe (12), and the discharge pipe (12) is conical. The interior of the discharge pipe (12) is connected to the interior of the feed pipe (2). The bottom of the feed pipe (2) is open, and its sidewall is sealed to the inner sidewall of the flow channel (1).

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