Liquid silica gel cold runner gel feeding device

Abstract

The utility model relates to a liquid silica gel cold runner gel feeding device, which comprises a main body, a feeding port, a main runner and a plurality of sub-runners are formed on the main body, one end of each sub-runner is communicated with the main runner, a discharging port is formed at the other end of each sub-runner, the main runner is communicated with the feeding port, and the feeding port is used for feeding liquid silica gel into the main runner; each cooling device is mounted on the main body and wraps each sub-runner, each cooling device comprises a cold nozzle core and a cold nozzle sleeve, each sub-runner is sleeved with the corresponding cold nozzle core, the cold nozzle sleeve is connected with the outer wall of the corresponding cold nozzle core so as to form a cooling channel, the cooling channels are used for introducing cooling liquid, and each cooling channel is communicated with the corresponding sub-runner. The liquid silica gel in each sub-runner is cooled; and the sealing piece is located at the discharging port and installed in a connecting gap between the cold nozzle core and the cold nozzle sleeve so as to seal the cooling channel and prevent cooling liquid from overflowing into a mold cavity to affect the mold forming speed or the product quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold runner injection molding equipment technical field, concretely relates to a liquid silicone cold runner glue feeding device. BACKGROUND

[0002] With the wide application of liquid silicone product in daily chemical industry, medical treatment, electron and automobile and the like, in order to realize high efficiency, high quality and low cost production of liquid silicone processing industry, make liquid liquid silicone injection molding technology get the rapid development. But the runner system of ordinary liquid silicone injection mold is hot runner system, that is, runner and cavity are in the heating state of hot plate, after injection, the glue in runner system and the glue in cavity solidify simultaneously, and when demolding, it is taken out simultaneously, and after being separated from the product, it is treated as waste material. In the injection molding process, because it is in the heating state, the machine adjustment becomes complex, and the product solidification cycle time also becomes longer.

[0003] Therefore, a cold runner device is proposed on the market, the cold runner mold keeps the runner at a lower temperature all the time by using refrigerant, prevents the lump-shaped molding compound in the runner from solidifying, then the remaining glue in the runner enters the cavity to form an injection molded product in the next molding, thereby overcoming many problems brought by the hot runner mold, and becoming the development direction of the current lump-shaped molding compound mold.

[0004] The cooling assembly of the traditional cold runner device generally adopts a water cooling pipeline, and the cooling water flow in the water cooling pipeline can generate certain pressure and impact force in the running process, which can cause the cooling liquid to overflow from the bottom of the cooling system and enter the mold, affect the molding speed of the mold, and even cause the mold to have air bubbles, damage the structural integrity of the mold, affect the product quality, and even cause the product to be scrapped, resulting in production loss. UTILITY MODEL CONTENTS

[0005] The utility model provides a liquid silicone cold runner glue feeding device to solve the problem of cooling liquid overflow caused by the pressure and impact force generated when the cooling water flows in the cold runner device.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] The adjustable distance bottom scraping positive column collision tool comprises a main body, a feeding port, a main flow channel and a plurality of branch flow channels, one end of each branch flow channel is communicated with the main flow channel, the other end of each branch flow channel is formed with a discharging port, the main flow channel is communicated with the feeding port, and the feeding port is used for feeding liquid silica gel into the main flow channel; a plurality of cooling devices are installed on the main body, and each cooling device is wrapped on each branch flow channel to cool the liquid silica gel in each branch flow channel; each cooling device comprises a cooling nozzle core and a cooling nozzle sleeve, the cooling nozzle core is sleeved on each branch flow channel, the cooling nozzle sleeve is connected with the outer wall of the cooling nozzle core to form a cooling channel, the cooling channel is used for feeding cooling liquid to cool the liquid silica gel in each branch flow channel; and a sealing element is located at the discharging port and installed in the connecting gap between the cooling nozzle core and the cooling nozzle sleeve to seal the cooling channel and prevent the cooling liquid from overflowing.

[0008] According to the above technical means, the sealing element is installed in the connecting gap between the cooling nozzle core and the cooling nozzle sleeve, which can effectively prevent the overflow of the cooling liquid, thereby preventing the cooling liquid from entering the mold cavity and affecting the molding speed of the mold or the product quality. Secondly, a plurality of branch flow channels are arranged in the main body, which can disperse the flow path of the liquid silica gel, thereby reducing the injection pressure in each branch flow channel, and the design of the plurality of branch flow channels enables the liquid silica gel to fill multiple cavities at a time, thereby doubling the number of finished products and improving the production efficiency.

[0009] Further, the plurality of branch flow channels comprise first sub-branch flow channels and second sub-branch flow channels, the first sub-branch flow channels are communicated with the second sub-branch flow channels, the flow of the liquid silica gel is facilitated, and each cooling device is wrapped on the second sub-branch flow channel to cool the liquid silica gel in each second sub-branch flow channel.

[0010] According to the above technical means, the cooling device is only wrapped on the second sub-branch flow channel, which can significantly reduce the cooling time and accelerate the overall injection cycle, and the liquid silica gel in the first sub-branch flow channel which is not wrapped by the cooling device can maintain good fluidity, avoiding the problem of flow channel blockage caused by the solidification of the liquid silica gel under the condition of overall cooling, and ensuring the continuity and stability of the injection process.

[0011] Further, the main body further comprises a gate sleeve and a flow distribution plate, the main flow channel is formed in the gate sleeve, the plurality of branch flow channels are formed in the flow distribution plate, the flow distribution plate is connected with the gate sleeve to communicate the main flow channel with each branch flow channel; and a sealing ring is arranged at the connection between the flow distribution plate and the gate sleeve to prevent the liquid silica gel from overflowing.

[0012] According to the above technical means, the liquid silicone is limited in the flow channel by the sealing ring, which can reduce the corrosion of the liquid silicone on the connecting part, prolong the service life of the equipment, and reduce the maintenance and replacement cost of the equipment.

[0013] Further, the outer periphery of the cooling nozzle sleeve is formed with a water inlet and a water outlet, which are communicated with the cooling channel to cool the liquid silicone in each second sub-flow channel.

[0014] According to the above technical means, the design of the water inlet and the water outlet can realize the circulating flow of the cooling liquid, ensure that the temperature in the second sub-flow channel is maintained within a suitable range, and prevent the liquid silicone from solidifying too early.

[0015] Further, the main body further comprises a plurality of driving devices and a plurality of valve needles, each driving device is installed on the flow distribution plate, each valve needle is connected with each driving device, one end of each valve needle can pass through each second sub-flow channel in the flow distribution plate and extend to the discharge port; each driving device is used to drive each valve needle to move along the length direction of the second sub-flow channel to seal or unseal the discharge port.

[0016] According to the above technical means, the cooperation of the driving device and the valve needle can accurately control the flow of the liquid silicone, and the valve needle can quickly and accurately complete the closing action under the control of the driving device, thereby effectively preventing the leakage and backflow of the liquid silicone, thereby optimizing the injection molding time, so that each layer of liquid silicone can be molded in the best state, thereby improving the overall quality of the product.

[0017] Further, each driving device is provided with a first limiting piece at the connection with the flow distribution plate, a through hole is formed in the first limiting piece, the other end of each valve needle passes through the through hole and is connected with each driving device, so that each driving device can drive each valve needle; the other end of the valve needle is formed with a second limiting piece, the diameter of the second limiting piece is greater than the diameter of the through hole, so as to limit the movement distance of the valve needle.

[0018] According to the above technical means, the first limiting piece can prevent the valve needle from moving excessively and damaging the flow channel. With the limitation of the first limiting piece, the service life of the valve needle and the flow channel is prolonged, the maintenance and replacement frequency of the equipment is reduced, and the production cost is reduced.

[0019] Further, a double-layer sealing assembly is arranged at the connection between the valve needle and the flow distribution plate, and the double-layer sealing assembly is arranged at intervals along the length direction of the valve needle, the valve needle can pass through the double-layer sealing assembly and extend into the second sub-flow channel, preventing the liquid silicone from entering the driving device.

[0020] According to the technical means, the double-layer sealing assembly can ensure the sealing of the connecting part, so that the material flows into each cavity under stable pressure, thereby improving the quality and consistency of the product and reducing product defects caused by pressure fluctuation or material leakage, such as material shortage and flash.

[0021] Further, the connecting piece is provided, and the valve needle is connected with the driving device through the connecting piece.

[0022] According to the technical means, the connecting piece can compensate the assembly error between the driving device and the valve needle during installation.

[0023] Further, the connecting piece is a sleeve, and the other end of the valve needle is located in the sleeve, and the sleeve is sleeved on the driving device, so that the other end of the valve needle is connected with the driving device.

[0024] According to the technical means, in the injection molding process, the connecting piece can slow down the impact force generated when the driving device moves, avoid the impact force directly transmitted to the valve needle, and prolong the service life of the valve needle; and the existence of the connecting piece makes the maintenance and replacement of the driving device and the valve needle more convenient.

[0025] Further, the main body comprises a positioning ring installed on the feeding port.

[0026] According to the technical means, the positioning ring can accurately position the main flow channel and the nozzle of the injection molding machine, avoid collision or excessive friction caused by position deviation of the main flow channel and the nozzle of the injection molding machine, ensure that the liquid silicone can flow into the main flow channel smoothly, thereby ensuring that the injection process of the liquid silicone is more stable, and the existence of the positioning ring makes the installation and disassembly of the device on the injection molding machine more convenient and fast.

[0027] The utility model discloses the beneficial effect: sealing member installs in the connecting gap between cold nozzle core and cold nozzle cover, can effectively prevent the leakage of coolant, and then prevents the coolant from entering the mold cavity, influences the mold forming speed or influences product quality. Secondly, a plurality of shunt channels are arranged in the main body, can disperse the flow path of liquid silicone, thereby reducing the injection pressure in each shunt channel, and the design of the plurality of shunt channels makes liquid silicone can fill multiple cavities simultaneously when injecting once, thereby doubling the finished product quantity of product, and thereby improving production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is one of the utility model three -dimensional structure diagram;

[0029] Figure 2 It is the second of the utility model three -dimensional structure diagram;

[0030] Figure 3 It is the utility model B area local enlarged view;

[0031] Figure 4 A zone local enlarged view of the utility model.

[0032] Reference signs:

[0033] 1-main body;10-feed inlet;11-main runner;12-runner;121-first sub-runner;122-second sub-runner;13-discharge port;14-gate;15-runner plate;151-upper runner plate;152-lower runner plate;16-seal ring;17-driving device;171-cylinder;172-cylinder connecting piece;18-valve needle;181-second limiting piece;19-positioning ring;

[0034] 2-cooling device;21-cooled core;22-cooled sleeve;221-water inlet;222-water outlet;23-cooling channel;

[0035] 3-sealing element;

[0036] 4-first limiting piece;

[0037] 5-double-layer sealing assembly;

[0038] 6-connecting piece.

[0039] The drawings are only for exemplary illustration, and should not be understood as limiting the patent;In order to better illustrate the embodiment, some components of the drawings may be omitted, enlarged or reduced, and do not represent the actual product size;For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted;The same or similar reference signs correspond to the same or similar components;The position relationship described in the drawings is only for exemplary illustration, and should not be understood as limiting the patent. DETAILED DESCRIPTION

[0040] The embodiments of the utility model will be described below with reference to the drawings and preferred embodiments, and those skilled in the art can easily understand other advantages and effects of the utility model from the contents disclosed in the specification. The utility model can also be implemented or applied by other different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the utility model. It should be understood that the preferred embodiments are only for illustration of the utility model, and are not intended to limit the protection scope of the utility model.

[0041] It is to be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and the drawings only show the components related to the present application, rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the component layout pattern can be more complex.

[0042] In the embodiments of the present application, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0043] In the embodiments of the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium.

[0044] In the embodiments of the present application, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a…" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0045] As shown in Figure 1 and Figure 4 In the present embodiment, a distance-adjustable bottom-scraping right column collision tool includes a main body 1, the main body 1 is formed with a feeding port 10, a main flow channel 11 and a plurality of branch flow channels 12, one end of each branch flow channel 12 communicates with the main flow channel 11, the other end of each branch flow channel 12 is formed with a discharging port 13, the main flow channel 11 communicates with the feeding port 10, and the feeding port 10 is used to introduce liquid silicone into the main flow channel 11; a plurality of cooling devices 2, each cooling device 2 is installed on the main body 1, and each cooling device 2 is wrapped on each branch flow channel 12 to cool the liquid silicone in each branch flow channel 12; each cooling device 2 includes a cooling nozzle core 21 and a cooling nozzle sleeve 22, the cooling nozzle core 21 is sleeved on each branch flow channel 12, the cooling nozzle sleeve 22 is connected with the outer wall of the cooling nozzle core 21 to form a cooling channel 23, the cooling channel 23 is used to introduce cooling liquid to cool the liquid silicone in each branch flow channel 12; a sealing element 3, the sealing element 3 is located at the discharging port 13, and the sealing element 3 is installed in the connecting gap between the cooling nozzle core 21 and the cooling nozzle sleeve 22 to seal the cooling channel 23 and prevent the cooling liquid from overflowing.

[0046] As Figure 1 shown, the liquid silicone enters the main flow channel 11 from the feed port 10, and due to the slope design of the main flow channel 11, it is helpful for the liquid silicone to flow down smoothly under the action of gravity, so that the liquid silicone can flow into each sub-flow channel 12 evenly and efficiently through the main flow channel 11, and then by controlling the opening degree of the control valve needle 18, the liquid silicone flows out from the discharge port 13 on the cold nozzle core 21 through the sub-flow channel 12, so that the liquid silicone is evenly distributed to each type of cavity. During the flow of the liquid silicone, it will pass through the cooling device 2, which only cools the liquid silicone in a section of the sub-flow channel, so as to control the solidification speed of the liquid silicone and realize the optimization of the performance of different parts of the product.

[0047] The sealing member 3 is installed in the connection gap between the cold nozzle core 21 and the cold nozzle sleeve 22, which can effectively prevent the leakage of the cooling liquid, and further prevent the cooling liquid from entering the mold cavity, affecting the molding speed of the mold or affecting the product quality. Secondly, a plurality of sub-flow channels 12 are arranged in the main body 1, which can disperse the flow path of the liquid silicone, thereby reducing the injection pressure in each sub-flow channel, and the design of the plurality of sub-flow channels 12 enables the liquid silicone to fill multiple cavities at one time, thereby doubling the number of finished products, thereby improving production efficiency.

[0048] As Figure 3 shown, in this embodiment, each sub-flow channel 12 includes a first sub-flow channel 121 and a second sub-flow channel 122, the first sub-flow channel 121 and the second sub-flow channel 122 are communicated, which is convenient for the flow of the liquid silicone, and each cooling device 2 is wrapped on the second sub-flow channel 122 to cool the liquid silicone in each second sub-flow channel 122, which can significantly reduce the cooling time and further speed up the overall injection cycle. The liquid silicone in the first sub-flow channel 121 which is not wrapped by the cooling device 2 can maintain good fluidity, avoiding the problem of flow channel blockage caused by the solidification of the liquid silicone under the condition of overall cooling, ensuring the continuity and stability of the injection process, and reducing the workload of the cooling equipment due to long-time injection, which can reduce the maintenance frequency of the equipment and save production cost.

[0049] Preferably, the first sub-flow channel 121 and the second sub-flow channel 122 form an L shape, and the first sub-flow channel 121 and the second sub-flow channel 122 both have a slope, so as to facilitate the flow of the liquid silicone from the first sub-flow channel 121 into the second sub-flow channel 122.

[0050] As Figure 1As shown, in this embodiment, the main body 1 also includes a gate component 14 and a manifold 15. A main channel 11 is formed within the gate component 14, and multiple branch channels 12 are formed within the manifold 15. The manifold 15 is connected to the gate component 14 so that the main channel 11 is connected to each branch channel 12. A sealing ring 16 is provided at the connection between the manifold 15 and the gate component 14 to prevent liquid silicone from overflowing. By confining the liquid silicone inside the flow channel through the sealing ring 16, the corrosion of the connection parts by the liquid silicone can be reduced, the service life of the equipment can be extended, and the maintenance and replacement costs of the equipment can be reduced.

[0051] Preferably, the flow divider 15 includes an upper flow divider 151 and a lower flow divider 152, which are connected by bolts. The main flow channel 11 is also connected to the upper flow divider 151 by bolts. The upper flow divider 151 has an opening communicating with the main flow channel 11. The slope of the opening is consistent with the slope of the main flow channel 11 to facilitate the flow of liquid silicone. The sealing ring 16 is disposed at the connection between the opening and the main flow channel 11, which can tightly fill the gap at this connection point, forming a barrier to effectively prevent leakage of liquid silicone and ensure that the liquid silicone flows according to the predetermined flow path.

[0052] like Figure 2 As shown, in this embodiment, the outer periphery of the cold nozzle sleeve 22 is formed with a water inlet 221 and a water outlet 222. The water inlet 221 and the water outlet 222 are connected to the cooling channel 23 to cool the liquid silicone in each of the second sub-channels 122.

[0053] The design of the inlet and outlet allows for the circulation of coolant, ensuring that the temperature within the second sub-channel 122 is maintained within a suitable range and preventing the liquid silicone from curing prematurely.

[0054] like Figure 1 As shown, in this embodiment, the main body 1 also includes multiple driving devices 17 and multiple valve needles 18. Each driving device 17 is mounted on the flow divider plate 15, and each valve needle 18 is connected to each driving device 17. One end of each valve needle 18 can pass through each of the second sub-flow channels 122 in the flow divider plate 15 and extend to the outlet 13. Each driving device 17 is used to drive each valve needle 18 to move along the length direction of the second sub-flow channel 122 to seal the outlet 13 or release the seal. The cooperation between the driving device 17 and the valve needle 18 can precisely control the flow of liquid silicone, and the valve needle 18 can quickly and accurately complete the closing action under the control of the driving device 17, thereby effectively preventing liquid silicone leakage and backflow, thereby improving and optimizing the injection molding time, so that each layer of liquid silicone can be molded in the best state, thereby improving the overall quality of the product.

[0055] Preferably, the driving device 17 comprises a cylinder 171 and a cylinder connecting piece 172, the cylinder 171 is connected with the cylinder connecting piece 172 by bolts, and the cylinder connecting piece 172 is bolted on the surface of the upper distribution plate 151 to ensure that the push rod in the cylinder 171 has sufficient moving range, and the cylinder 171 is provided with an air inlet and an air outlet to control the movement of the push rod in the cylinder, thereby moving the valve needle 18 to complete the action of opening and closing the discharge port 13.

[0056] As shown in Figure 1 the embodiment, the first limiting piece 4 is arranged at the connection between each driving device 17 and the distribution plate 15, the first limiting piece 4 is formed with a through hole, the other end of each valve needle 18 passes through the through hole and is connected with each driving device 17, so that each driving device 17 can drive each valve needle 18; the other end of the valve needle 18 is formed with a second limiting piece 181, the diameter of the second limiting piece 181 is greater than the diameter of the through hole to limit the moving distance of the valve needle 18. The first limiting piece 4 can prevent the valve needle 18 from moving excessively and damaging the distribution channel 12. With the limitation of the first limiting piece 4, the service life of the valve needle 18 and the distribution channel 12 is prolonged, the maintenance and replacement frequency of the equipment is reduced, and the production cost is reduced.

[0057] Preferably, the distribution plate 15 is recessed downward to form a recess, and the first limiting piece 4 is located in the recess, and the upper surface of the first limiting piece 4 abuts against the end of the cylinder connecting piece to avoid deformation of the cylinder connecting piece due to the first limiting piece 4 located on the surface of the distribution plate 15 during installation of the cylinder connecting piece.

[0058] As shown in Figure 1 and Figure 3 the embodiment, the connection between the valve needle 18 and the distribution plate 15 is provided with a double-layer sealing assembly 5, and the double-layer sealing assembly 5 is arranged along the length direction of the valve needle 18, the valve needle 18 can pass through the double-layer sealing assembly 5 and extend into the second sub-distribution channel 122 to prevent liquid silicone from entering the driving device 17.

[0059] The double-layer sealing assembly 5 can ensure the sealing of the connection part, so that the liquid silicone flows uniformly into each cavity under stable pressure, thereby improving the quality and consistency of the product, and reducing product defects caused by pressure fluctuation or material leakage, such as material shortage, flash, etc. Secondly, during the injection molding process, the liquid silicone flows in the flow channel under a certain pressure. A single layer of sealing may leak due to long-term pressure impact or small assembly gap. The double-layer sealing is like two lines of defense. Even if one layer of sealing is slightly worn or fails, the other layer of sealing can still effectively prevent material leakage and ensure that the material flows in the flow channel according to the predetermined path.

[0060] As shown in Figure 1 and Figure 4As shown in the embodiment, the connecting piece 6 is a sleeve, the other end of the valve needle 18 is located in the sleeve, and the sleeve is sleeved on the driving device 17, so that the other end of the valve needle 18 is connected with the driving device 17. During the injection molding process, the connecting piece 6 can slow down the impact force generated when the driving device 17 moves, avoid the impact force being directly transmitted to the valve needle 18, and prolong the service life of the valve needle 18; and the presence of the connecting piece 6 makes the maintenance and replacement of the driving device 17 and the valve needle 18 more convenient.

[0061] As shown in the embodiment, the connecting piece 6 is a sleeve, the other end of the valve needle 18 is located in the sleeve, and the sleeve is sleeved on the driving device 17, so that the other end of the valve needle 18 is connected with the driving device 17. During the injection molding process, the connecting piece 6 can slow down the impact force generated when the driving device 17 moves, avoid the impact force being directly transmitted to the valve needle 18, and prolong the service life of the valve needle 18; and the presence of the connecting piece 6 makes the maintenance and replacement of the driving device 17 and the valve needle 18 more convenient. Figure 1 Figure 4 As shown in the embodiment, the connecting piece 6 is a sleeve, the other end of the valve needle 18 is located in the sleeve, and the sleeve is sleeved on the driving device 17, so that the other end of the valve needle 18 is connected with the driving device 17. During the injection molding process, the connecting piece 6 can slow down the impact force generated when the driving device 17 moves, avoid the impact force being directly transmitted to the valve needle 18, and prolong the service life of the valve needle 18; and the presence of the connecting piece 6 makes the maintenance and replacement of the driving device 17 and the valve needle 18 more convenient.

[0062] As shown in the embodiment, the connecting piece 6 is a sleeve, the other end of the valve needle 18 is located in the sleeve, and the sleeve is sleeved on the driving device 17, so that the other end of the valve needle 18 is connected with the driving device 17. During the injection molding process, the connecting piece 6 can slow down the impact force generated when the driving device 17 moves, avoid the impact force being directly transmitted to the valve needle 18, and prolong the service life of the valve needle 18; and the presence of the connecting piece 6 makes the maintenance and replacement of the driving device 17 and the valve needle 18 more convenient. Figure 1 As shown in the embodiment, the connecting piece 6 is a sleeve, the other end of the valve needle 18 is located in the sleeve, and the sleeve is sleeved on the driving device 17, so that the other end of the valve needle 18 is connected with the driving device 17. During the injection molding process, the connecting piece 6 can slow down the impact force generated when the driving device 17 moves, avoid the impact force being directly transmitted to the valve needle 18, and prolong the service life of the valve needle 18; and the presence of the connecting piece 6 makes the maintenance and replacement of the driving device 17 and the valve needle 18 more convenient.

[0063] Preferably, the diameter of the connecting part of the main flow channel 11 and the feed port 10 is smaller than the diameter of the port of the first sub-flow channel 121, so as to facilitate the flow of liquid silicone. When the diameter of the connecting part of the main flow channel 11 and the feed port 10 is smaller than the diameter of the port of the sub-flow channel 12, the liquid silicone enters the larger channel from the smaller channel. According to the principle of fluid mechanics, the flow rate of the liquid silicone will be accelerated. The smaller port of the main flow channel 11 connected with the feed port 10 can play a certain "constraint" role on the liquid silicone, so that it forms a more concentrated flow state before entering the sub-flow channel 12, which helps to reduce the flow resistance of the liquid silicone when entering the sub-flow channel 12. The diameter difference is conducive to the uniform distribution of the liquid silicone in the sub-flow channel 13.

[0064] More preferably, the port diameter of the feed port 10 is larger than the diameter of the connecting part of the main flow channel 11 and the feed port 10, which facilitates the injection of the liquid silicone into the device by the nozzle of the injection machine, and the change of the port diameter can play a role in buffering pressure; secondly, the larger port diameter of the feed port 10 makes it less likely to splash when the liquid silicone enters, which helps to reduce the loss of liquid silicone.

[0065] ​The above examples are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or transformations made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A liquid silicone rubber cold runner resin inlet device, characterized by, The utility model relates to a liquid silicone rubber cooling device, which comprises: a main body (1) formed with a feeding port (10), a main flow channel (11) and a plurality of branch flow channels (12), one end of each branch flow channel (12) being communicated with the main flow channel (11), the other end of each branch flow channel (12) being formed with a discharging port (13), the main flow channel (11) being communicated with the feeding port (10), and the feeding port (10) being used for feeding liquid silicone rubber into the main flow channel (11); a plurality of cooling devices (2), each cooling device (2) being mounted on the main body (1), and each cooling device (2) being wrapped around each branch flow channel (12) to cool the liquid silicone rubber in each branch flow channel (12); each cooling device (2) comprises a cooling nozzle core (21) and a cooling nozzle sleeve (22), the cooling nozzle core (21) being sleeved on each branch flow channel (12), and the cooling nozzle sleeve (22) being connected with the outer wall of the cooling nozzle core (21) to form a cooling channel (23) for feeding cooling liquid to cool the liquid silicone rubber in each branch flow channel (12); a sealing member (3) located at the discharging port (13) and mounted in the connecting gap between the cooling nozzle core (21) and the cooling nozzle sleeve (22) to seal the cooling channel (23) and prevent the cooling liquid from overflowing.

2. The liquid silicone rubber cold runner resin inlet device of claim 1, wherein, Each branch flow channel (12) comprises a first sub-branch flow channel (121) and a second sub-branch flow channel (122), the first sub-branch flow channel (121) being communicated with the second sub-branch flow channel (122) to facilitate the flow of liquid silicone rubber, and each cooling device (2) being wrapped around the second sub-branch flow channel (122) to cool the liquid silicone rubber in each second sub-branch flow channel (122).

3. The liquid silicone rubber cold runner resin inlet device of claim 2, wherein, The main body (1) further comprises a gate member (14) and a branch flow plate (15), the main flow channel (11) being formed in the gate member (14), a plurality of branch flow channels (12) being formed in the branch flow plate (15), and the branch flow plate (15) being connected with the gate member (14) to make the main flow channel (11) communicated with each branch flow channel (12); a sealing ring (16) is arranged at the connection between the branch flow plate (15) and the gate member (14) to prevent the liquid silicone rubber from overflowing.

4. The liquid silicone rubber cold runner resin inlet device of claim 3, wherein, The outer periphery of the cooling nozzle sleeve (22) is formed with a water inlet (221) and a water outlet (222), the water inlet (221) and the water outlet (222) being communicated with the cooling channel (23) to cool the liquid silicone rubber in each second sub-branch flow channel (122).

5. The liquid silicone rubber cold runner resin inlet device of claim 4, wherein, The main body (1) further comprises a plurality of driving devices (17) and a plurality of valve needles (18), each of the driving devices (17) is installed on the shunt plate (15), each of the valve needles (18) is connected with each of the driving devices (17), and one end of each of the valve needles (18) can pass through each of the second sub-shunt channels (122) in the shunt plate (15) and extend to the discharge port (13); each of the driving devices (17) is used for driving each of the valve needles (18) to move along the length direction of the second sub-shunt channel (122) to seal or unseal the discharge port (13).

6. The liquid silicone rubber cold runner resin inlet device of claim 5, wherein, A first limiting piece (4) is arranged at the connection position of each of the driving devices (17) and the shunt plate (15), a through hole is formed in the first limiting piece (4), the other end of each of the valve needles (18) passes through the through hole and is connected with each of the driving devices (17), so that each of the driving devices (17) can drive each of the valve needles (18); the other end of the valve needle (18) is formed with a second limiting piece (181), and the diameter of the second limiting piece (181) is greater than the diameter of the through hole, so as to limit the movement distance of the valve needle (18).

7. The liquid silicone rubber cold runner resin inlet device of claim 6, wherein, A double-layer sealing assembly (5) is arranged at the connection position of the valve needle (18) and the shunt plate (15), and the double-layer sealing assembly (5) is arranged at intervals along the length direction of the valve needle (18), the valve needle (18) can pass through the double-layer sealing assembly (5) and extend into the second sub-shunt channel (122), so as to prevent liquid silicone from entering the driving device (17).

8. The liquid silicone rubber cold runner resin inlet device of claim 6, wherein, A connecting piece (6) is further arranged, and the valve needle (18) is connected with the driving device (17) through the connecting piece (6).

9. The liquid silicone rubber cold runner resin inlet device of claim 8, wherein, The connecting piece (6) is a sleeve, the other end of the valve needle (18) is located in the sleeve, and the sleeve is sleeved on the driving device (17), so that the other end of the valve needle (18) is connected with the driving device (17).

10. The liquid silicone rubber cold-runner gate injection device of claim 1, wherein, The main body (1) further comprises a positioning ring (19), and the positioning ring (19) is installed on the feeding port (10).

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