Rubber cold runner system

Abstract

The invention relates to the technical field of injection molding models and sprue channels, in particular to a rubber cold runner system. The rubber cold runner system comprises an injection runner plate, a rubber runner is formed in a plate body of the injection runner plate, the rubber runner comprises horizontal runners extending along an extension plane of the plate body, a rubber inlet is formed in the injection runner plate, the horizontal runners are communicated with the rubber inlet, and the horizontal runners are communicated with the rubber inlet. The injection runner plate is provided with injection nozzles at the tail ends of the horizontal runners, the injection nozzles extend in the thickness direction of the plate body, injection runners of the injection nozzles are communicated with the horizontal runners, a quick cooling runner and a temperature control runner which extend along the extension plane of the plate body are further formed in the injection runner plate, and the temperature control runner is communicated with the quick cooling runner in the thickness direction of the injection runner plate. The rapid cooling runner is located between the horizontal runner and the temperature control runner; when the rubber cold runner system is manufactured, only the corresponding runner holes need to be machined in the thickness direction of the plate body, the whole machining process is simple, use is easy, operation is easy, and cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding models and gate channels, and in particular to a rubber cold runner system. Background Art

[0002] With the widespread use of rubber products, the preparation process of rubber products has been gradually optimized. In the preparation process of rubber products, the molten rubber liquid is usually temperature-controlled through the cold runner system, and then injected into the molding mold through the nozzle, so that the rubber liquid is cooled and molded into the corresponding rubber product. In this process, the temperature of the rubber liquid needs to be maintained in the appropriate range of 50℃-80℃ to have good fluidity, but the inside of the runner will inevitably conduct heat with the outside, making the temperature distribution of the rubber liquid in the runner uneven. When the temperature of the rubber liquid is too high, vulcanization will occur. Vulcanization refers to the cross-linking of the linear polymer of the rubber to form a network polymer, so that the rubber has higher strength. After the rubber liquid is vulcanized, it will cause flashing of the final molded rubber product, and may even cause the rubber liquid to be thermally solidified at the nozzle, causing the nozzle to be blocked, and then cause the product to be short of material.

[0003] In response to the above problems, a Chinese invention patent application with application publication number CN116494480A and application publication date 2023.07.28 discloses a rubber cold runner system, whose solution is to install a support member in the gap between the guide member and the first mounting cavity to reduce the contact area between the guide member and the fixed component, thereby reducing heat conduction, and at the same time arrange a cooling liquid channel around the rubber flow channel to form an "oil path wrapped in rubber path" structure to balance the temperature difference between the nozzles.

[0004] The above scheme can achieve the cooling of the glue liquid, but the processing difficulty is relatively large. First, an X-shaped guide piece needs to be processed, and rubber flow channels and coolant channels need to be processed on the X-shaped guide piece respectively. The processing is difficult and the cost is high. After the X-shaped guide piece is placed in the first installation cavity, a support piece needs to be installed in the gap between the guide piece and the first installation cavity. The installation steps are cumbersome and inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to provide a rubber cold runner system, which can control the temperature of the rubber liquid by cooling the rubber liquid step by step. The system is simple to process and easy to use, and solves the problems of difficult processing, high cost, complicated installation steps and inconvenient use in the prior art.

[0006] To achieve the above object, the rubber cold runner system of the present invention adopts the following technical solutions:

[0007] The rubber cold runner system includes an injection runner plate, a rubber runner is provided in the plate body of the injection runner plate, the rubber runner includes horizontal runners extending along the extension plane of the plate body, a glue inlet is provided on the injection runner plate, and each horizontal runner is connected to the glue inlet. The injection runner plate is provided with an injection nozzle at the end position of each horizontal runner, and the injection nozzle extends along the thickness direction of the plate body. The injection runner of the injection nozzle is connected to the horizontal runner. A quick cooling runner and a temperature control runner extending along the extension plane of the plate body are also provided in the injection runner plate. In the thickness direction of the injection runner plate, the quick cooling runner is located between the horizontal runner and the temperature control runner.

[0008] Furthermore, a temperature-averaging runner plate is provided on the side of the injection runner plate facing away from the glue inlet, the injection nozzle is embedded in the temperature-averaging runner plate, heat is conducted between the injection nozzle and the temperature-averaging runner plate, and a cooling runner extending through the injection nozzle is provided in the temperature-averaging runner plate.

[0009] Furthermore, the horizontal flow channels are distributed radially around the glue inlet.

[0010] Furthermore, there are four horizontal flow channels, which are arranged in an X shape.

[0011] Furthermore, the rapid cooling channel comprises a plurality of straight channels which are parallel to each other and arranged at intervals, the rapid cooling channel penetrates the injection channel plate horizontally, and the injection nozzle is located between two adjacent straight channels.

[0012] Furthermore, the temperature control flow channel is arranged around the injection nozzle, and the temperature control flow channel includes a plurality of straight channels arranged perpendicularly and crosswise to each other.

[0013] Furthermore, the cooling channel comprises a plurality of straight channels which are parallel to each other and arranged at intervals, the cooling channel horizontally penetrates the temperature-averaging channel plate, and the injection nozzle is located between two adjacent straight channels.

[0014] Furthermore, a heat-insulating layer is sandwiched between the injection channel plate and the temperature-averaging channel plate, and an avoidance hole is provided on the heat-insulating layer at a position corresponding to the injection nozzle.

[0015] Furthermore, the injection nozzle includes an injection tube and a connecting flange in the middle of the injection tube. The injection channel is arranged in the injection tube. One end of the injection tube is sealed and connected to the injection channel plate, and the other end is thermally coordinated with the temperature equalizing channel plate. The connecting flange is assembled in the avoidance hole.

[0016] Furthermore, a cooling channel is provided in the connecting flange, and a longitudinal through hole connected to the cooling channel is provided on the upper end surface of the connecting flange. An extension channel is provided on the injection channel plate at a position corresponding to the temperature control channel and the longitudinal through hole, and the extension channel is used to connect the temperature control channel and the longitudinal through hole.

[0017] Beneficial effects: The rubber cold runner system of the present invention is a pioneering invention. By processing horizontal runners, quick cooling runners and temperature control runners on the injection runner plate, the rubber liquid can flow from the glue inlet into the horizontal runner, and then flow into the injection nozzle from the horizontal runner. The quick cooling runner and the temperature control runner are layered along the thickness direction of the injection runner plate, so that the quick cooling runner and the temperature control runner cool the rubber liquid step by step. The rubber liquid has good fluidity throughout the process, avoiding the vulcanization of the rubber liquid and causing no blockage of the runner. In addition, when manufacturing the runner of this structural form, it is only necessary to process the corresponding runner holes along the thickness direction of the plate body. The entire processing process is simple, the processing difficulty is relatively low, it is easy to use and easy to operate, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the rubber cold runner system of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the overall structure from another perspective;

[0020] Figure 3 It is a schematic cross-sectional structure diagram of a rubber runner in an injection runner plate in an embodiment of the rubber cold runner system of the present invention;

[0021] Figure 4 It is a schematic cross-sectional structure diagram of a rapid cooling runner in an injection runner plate in an embodiment of the rubber cold runner system of the present invention;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of a temperature control runner in an injection runner plate in one embodiment of the rubber cold runner system of the present invention;

[0023] Figure 6 for Figure 5 Sectional view at AA in the middle;

[0024] Figure 7 It is a schematic structural diagram of a heat preservation layer in an embodiment of the rubber cold runner system of the present invention;

[0025] Figure 8 It is a structural schematic diagram of an injection nozzle in an embodiment of the rubber cold runner system of the present invention;

[0026] Fig. 9 It is a schematic cross-sectional structure diagram of an injection nozzle in one embodiment of the rubber cold runner system of the present invention;

[0027] Fig.10 The figure is a schematic cross-sectional structure diagram of a cooling channel in a temperature-averaging channel plate in an embodiment of a rubber cold runner system of the present invention.

[0028] In the figure: 1. Horizontal flow channel; 2. Injection flow channel; 3. Glue inlet; 4. Injection flow channel plate; 5. Uniform temperature flow channel plate; 6. Rapid cooling flow channel; 7. Temperature control flow channel; 8. Cooling flow channel; 9. Bolts; 10. Insulation layer; 11. Injection nozzle; 12. Avoidance hole; 13. Injection tube; 14. Connecting flange; 15. Circulation channel; 16. Cooling flow channel; 17. Longitudinal perforation; 18. Extension channel; 19. Plug. DETAILED DESCRIPTION

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] Embodiments of the rubber cold runner system of the present invention:

[0031] In the prior art, the rubber cold runner system often uses a coolant pipeline to cool the rubber liquid in the runner plate, but the system needs to process an X-shaped guide member, and process an X-shaped rubber runner on the guide member and a coolant pipeline around the rubber runner. The processing is difficult and the cost is high. When the guide member is installed in the first installation cavity, a support member needs to be installed in the gap between the guide member and the first installation cavity. The assembly process is cumbersome and inconvenient to use. In response to this problem, the present invention proposes a rubber cold runner system, which can cool the rubber liquid by only processing corresponding channels in the plate body so that the rubber liquid and the coolant flow along their respective channels. The overall processing process is simple, the processing difficulty is small, and the use process is simple and easy to operate, and the cost is low.

[0032] See also Figure 1 to Figure 2 As a basic embodiment of the present invention, the rubber cold runner system of the present invention includes an injection runner plate 4, a rubber runner is arranged in the plate body of the injection runner plate 4, the rubber runner includes horizontal runners 1 extending along the plate body extension plane, a glue inlet 3 is also arranged on the injection runner plate 4, each horizontal runner 1 is connected to the glue inlet 3, the injection runner plate 4 is provided with an injection nozzle 11 at the end position of each horizontal runner 1, the injection nozzle 11 extends along the plate body thickness direction of the injection runner plate 4, the injection runner 2 of the injection nozzle 11 is connected to the horizontal runner 1, the glue liquid can flow into the horizontal runner 1 from the glue inlet 3 and flow along The horizontal flow channel 1 flows into the injection flow channel 2 of the injection nozzle 11 and is finally ejected by the injection nozzle 11. A quick cooling flow channel 6 and a temperature control flow channel 7 extending along the extension plane of the plate body are also provided inside the injection flow channel plate 4. Along the thickness direction of the injection flow channel plate 4, the quick cooling flow channel 6 is located between the horizontal flow channel 1 and the temperature control flow channel 7. The quick cooling flow channel 6 can perform an initial cooling on the glue liquid flowing into the horizontal flow channel 1, and the temperature control flow channel 7 can perform a secondary cooling on the glue liquid flowing into the injection flow channel 2 and after the initial cooling, so as to control the glue liquid within an appropriate temperature range, so that the glue liquid maintains good fluidity, and avoids vulcanization blockage of the glue liquid.

[0033] As a preferred embodiment of the present invention, a temperature-averaging runner plate 5 is provided on the side of the injection runner plate 4 facing away from the glue inlet 3, and the injection nozzle 11 is embedded in the temperature-averaging runner plate 5. The temperature-averaging runner plate 5 can conduct the heat of the injection nozzle 11, that is, a cooling runner 8 with an extension path passing around the injection nozzle 11 is provided in the temperature-averaging runner plate 5. The cooling runner 8 can cool the glue entering the injection nozzle 11, ensuring that the glue in each injection nozzle 11 is at the same temperature, thereby ensuring the temperature consistency and uniformity of the sprayed glue.

[0034] See also Figure 3 As a preferred embodiment of the present invention, the horizontal flow channels 1 are radially distributed around the glue inlet 3, that is, the horizontal flow channels 1 are distributed in an array around the glue inlet 3, the glue inlet 3 is connected to each horizontal flow channel 1, the glue entering from the glue inlet 3 flows synchronously along the horizontal flow channels 1, and an injection nozzle 11 is correspondingly provided at the outer end of each horizontal flow channel 1, and the glue can flow into the corresponding injection flow channel 2 along each horizontal flow channel 1.

[0035] As a preferred embodiment of the present invention, the horizontal flow channels 1 are set to four, and the corresponding injection nozzles 11 are also set to four. The four horizontal flow channels 1 are arranged in an X shape, that is, one end of the four horizontal flow channels 1 overlaps and is connected to the glue inlet 3. After the glue enters from the glue inlet 3, it flows synchronously along the four horizontal flow channels 1 until it flows into the injection flow channel 2 of the corresponding injection nozzle 11. Such an arrangement can make the glue liquid more evenly distributed, reduce the accumulation and blockage of the glue liquid in the horizontal flow channel 1, and the inconsistent flow direction can reduce the pressure loss of the glue liquid during the flow process, which is conducive to keeping the injection pressure stable and improving the molding quality of the product. In other embodiments, the horizontal flow channels 1 can also be set to eight, and the corresponding injection nozzles 11 are also set to eight. The eight horizontal flow channels 1 are arranged in a "rice" shape. As long as the flow speed and flow time of the glue liquid in each horizontal flow channel 1 are consistent, the specific number of horizontal flow channels 1 can be determined according to actual use requirements.

[0036] See also Figure 4As a preferred embodiment of the present invention, the quick cooling channel 6 includes a plurality of straight channels parallel to each other and arranged at intervals. The plurality of straight channels extend along the length direction of the injection channel plate 4 and pass through the injection channel plate 4 straightly. The injection nozzle 11 is located between two adjacent straight channels, and the coolant is introduced into the quick cooling channel 6. In order to avoid introducing the coolant into each straight channel separately, a circulation channel 15 is connected between each two adjacent straight channels. The circulation channel 15 connects the two adjacent straight channels. Such an arrangement enables the quick cooling channel 6 to only have one coolant inlet and outlet, which is convenient for control. A plug 19 is provided in the channel 15, which can reduce the travel of the coolant and improve the cooling efficiency. After the coolant is introduced, it will flow to the outlet along the straight channel and the circulation channel 15 in sequence, forming a flow cycle, and taking away the heat of the glue in the horizontal channel 1 above. Here, cooling oil is used as the coolant in the quick cooling channel 6, and by setting the quick cooling channel 6 to a straight through type, the flow rate of the cooling oil can be increased, so that the coolant can reach the corresponding position faster, and the distribution uniformity of the coolant can be improved. The cooling oil can quickly take away the heat of the glue in the horizontal channel 1 at a faster flow rate, so that the glue can be quickly cooled and the local temperature difference of the glue can be reduced. In other embodiments, cooling water or other coolants can also be used to pass into the quick cooling channel 6, as long as a low temperature can be maintained to cool the glue in the horizontal channel 1; in other embodiments, the quick cooling channel 6 can also be arranged in multiple layers along the thickness direction of the injection channel plate 4, as long as it does not affect the flow of the glue in the injection channel 2 of the injection nozzle 11.

[0037] See also Figures 5 to 9As a preferred embodiment of the present invention, the temperature control channel 7 is arranged around the injection nozzle 11, and the temperature control channel 7 includes a plurality of straight channels arranged perpendicularly and crosswise to each other, that is, a plurality of horizontally extending straight channels are arranged along the length and width directions of the injection channel plate 4, and the coolant is introduced into the temperature control channel 7. The temperature control channel is also provided with an inlet and an outlet for the coolant. The coolant is introduced from the inlet, flows along the length direction of the temperature control channel 7, and is divided at the intersection until it flows to the outlet to form a flow cycle. Cooling oil is used as the coolant in the temperature control channel 7 here, and the straight channels are arranged perpendicularly and crosswise to each other, so that the cooling oil is divided when it flows to the cross-connected part, slowing down the flow speed of the cooling oil. Compared with the quick cooling channel 6, the cooling oil in the temperature control channel 7 flows relatively smoothly, has a smaller effect on regulating the temperature, and has a stronger effect on controlling the temperature. Therefore, the temperature difference of the glue in the injection channel 2 of each injection nozzle 11 can be reduced, so that the glue temperature in each injection channel 2 remains consistent. In other embodiments, cooling water or other cooling liquids may be passed into the temperature control channel 7 to cool the rubber liquid in the rubber channel as long as a relatively low temperature can be maintained; in other embodiments, the temperature control channel 7 may be arranged in multiple layers along the thickness direction of the injection channel plate 4 as long as the flow of the rubber liquid in the injection channel 2 of the injection nozzle 11 is not affected.

[0038] As a preferred embodiment of the present invention, the temperature-averaging runner plate 5 is fixedly installed on the injection runner plate 4 by bolts 9. An insulation layer 10 is also sandwiched between the temperature-averaging runner plate 5 and the injection runner plate 4. The insulation layer 10 is a heat-insulating material. An avoidance hole 12 is opened on the insulation layer 10. The position of the avoidance hole 12 corresponds to the position of the injection nozzle 11, that is, one end of the injection nozzle 11 is located in the injection runner plate 4, and the other end is located in the temperature-averaging runner plate 5 after passing through the avoidance hole 12. The insulation layer 10 can effectively reduce the heat exchange between the inside of the cold runner system and the external environment, maintain a stable low-temperature environment inside the system, and reduce energy loss. In other embodiments, the temperature-averaging runner plate 5 can also be fixedly installed below the injection runner plate by pins, and can also be connected to the injection runner plate by other connecting structures, as long as the two can form a firm connection and are not easily separated.

[0039] As a preferred embodiment of the present invention, the injection nozzle 11 includes an injection tube 13 and a connecting flange 14 fixedly mounted in the middle of the injection tube 13. The injection channel 2 is arranged in the injection tube 13. One end of the injection tube 13 is sealed and connected to the injection channel plate 4, and the other end is heat-conductively matched with the temperature-averaging channel plate 5. The connecting flange 14 is assembled in the avoidance hole 12 of the insulation layer 10. During the process of the glue liquid in the injection channel 2 flowing in the injection tube 13 and being ejected by the injection tube 13, the heat in the injection tube 13 can be conducted to the temperature-averaging channel plate 5, and the cooling channel 8 in the temperature-averaging channel plate 5 absorbs the heat, thereby achieving the purpose of cooling and ensuring that the glue liquid is within an appropriate temperature range.

[0040] As a preferred embodiment of the present invention, a cooling channel 16 is provided in the connecting flange 14, and longitudinal perforations 17 are symmetrically arranged on the upper end surface of the connecting flange 14. The longitudinal perforations 17 extend along the axial direction of the connecting flange 14 to communicate with the cooling channel 16. The injection channel plate 4 is provided with an extension channel 18 at a position corresponding to the temperature control channel 7 and the longitudinal perforations 17. The extension channel 18 connects the temperature control channel 7 and the longitudinal perforations 17. The coolant in the temperature control channel 7 can flow into the longitudinal perforations 17 on the connecting flange 14 along the extension channel 18, and then flow in the connecting flange 14 along the cooling channel 16 for one circle, and then flow out from another longitudinal perforation 17 of the connecting flange, and return to the temperature control channel 7 along the corresponding extension channel 18. Such a setting can keep the connecting flange 14 and the insulation layer 10 within a suitable temperature range at all times, thereby avoiding excessive temperature rise of the connecting flange 14 and the insulation layer 10, which affects the fluidity of the glue in the injection channel.

[0041] See also Fig.10 As a preferred embodiment of the present invention, the cooling channel 8 also includes a plurality of straight channels parallel to each other and arranged at intervals. The cooling channel 8 horizontally penetrates the uniform temperature channel plate 5. The injection nozzle 11 in the uniform temperature channel plate 5 is located between two adjacent straight channels, that is, each straight channel extends along the length direction of the uniform temperature channel plate 5 and penetrates the uniform temperature channel plate 5 straightly. The straight channels are not connected to each other, and coolant needs to be introduced into each straight channel separately. The two ends of the straight channel can be the inlet and outlet of the coolant to each other. The coolant flows along the length direction of the cooling channel 8 to cool the glue in the injection nozzle 11. Here, cooling oil is used as the coolant in the cooling channel 8, and the cooling channel 8 is also set to a straight through type, so that the glue entering the injection nozzle 11 can be finally cooled down, and dynamically adjusted according to the temperature of the glue itself, so that the glue in the injection nozzle 11 is always kept within a suitable temperature range and maintains good fluidity, which is convenient for the injection nozzle 11 to discharge the glue and avoid the glue vulcanization and clogging of the injection nozzle 11. In other embodiments, cooling water or other coolants may be passed into the temperature control channel 7 to cool the glue liquid in the injection nozzle 11 as long as a relatively low temperature can be maintained; in other embodiments, the cooling channel 8 may also be arranged in multiple layers along the thickness direction of the temperature-averaging channel plate 5 as long as the injection nozzle 11 does not affect the spraying of the glue liquid.

[0042] The operation process of the rubber cold runner system of the present invention is as follows: the glue liquid flows into the horizontal runner 1 from the glue inlet 3, and in the process of flowing along the horizontal runner 1 to the injection runner 2 of the injection nozzle 11, the coolant in the quick cooling runner 6 performs the initial cooling of the glue liquid in the horizontal runner 1, so that the glue liquid quickly reaches a suitable temperature range, and then the glue liquid enters the injection runner 2, and in the process of flowing along the length direction of the injection runner 2, the coolant in the temperature control runner 7 performs the secondary cooling and temperature control of the glue liquid in the injection runner 2 in the injection runner plate, ensuring that the temperature of the glue liquid in each injection runner 2 in the injection runner plate remains the same, and then the glue liquid flows along the injection runner 2 to the injection runner plate. When it reaches the insulation layer 10, the coolant in the temperature control channel 7 will flow into the cooling channel 16 in the connecting flange 14 along the extension channel 18 to cool the connecting flange 14 and the insulation layer 10. Then the glue reaches the injection channel 2 in the temperature-averaging channel plate 5. At this time, the coolant in the cooling channel 8 cools the glue in the injection channel 2 in the temperature-averaging channel plate 5, so that the glue temperature in each injection nozzle 11 inside the temperature-averaging channel plate 5 remains consistent. After three steps of step-by-step cooling, the glue is finally discharged from the injection nozzle 11. During the whole process, the glue is always in a suitable temperature range, and vulcanization will not occur to cause channel blockage.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A rubber cold runner system, characterized in that: It includes an injection flow channel plate, a rubber flow channel is opened in the plate body of the injection flow channel plate, the rubber flow channel includes horizontal flow channels extending along the extension plane of the plate body, a glue inlet is provided on the injection flow channel plate, and each horizontal flow channel is connected with the glue inlet. The injection flow channel plate is provided with an injection nozzle at the end position of each horizontal flow channel, the injection nozzle extends along the thickness direction of the plate body, and the injection flow channel of the injection nozzle is connected with the horizontal flow channel. The injection flow channel plate is also provided with a quick cooling flow channel and a temperature control flow channel extending along the extension plane of the plate body. In the thickness direction of the injection flow channel plate, the quick cooling flow channel is located between the horizontal flow channel and the temperature control flow channel.

2. The rubber cold runner system according to claim 1, characterized in that: A temperature-averaging runner plate is provided on the side of the injection runner plate facing away from the glue inlet, and the injection nozzle is embedded in the temperature-averaging runner plate. The injection nozzle and the temperature-averaging runner plate are heat-conductingly matched, and a cooling runner extending through the injection nozzle is provided in the temperature-averaging runner plate.

3. The rubber cold runner system according to claim 1 or 2, characterized in that: The horizontal flow channels are distributed radially around the glue inlet.

4. The rubber cold runner system according to claim 3, characterized in that: There are four horizontal flow channels, which are arranged in an X shape.

5. The rubber cold runner system according to claim 1 or 2, characterized in that: The quick cooling channel comprises a plurality of straight channels which are parallel to each other and arranged at intervals. The quick cooling channel horizontally penetrates the injection channel plate, and the injection nozzle is located between two adjacent straight channels.

6. The rubber cold runner system according to claim 1 or 2, characterized in that: The temperature control flow channel is arranged around the injection nozzle, and the temperature control flow channel includes a plurality of straight channels arranged perpendicularly and crosswise to each other.

7. The rubber cold runner system according to claim 2, characterized in that: The cooling channel comprises a plurality of straight channels which are parallel to each other and arranged at intervals. The cooling channel horizontally penetrates the temperature-averaging channel plate, and the injection nozzle is located between two adjacent straight channels.

8. The rubber cold runner system according to claim 2, characterized in that: A heat-insulating layer is sandwiched between the injection flow channel plate and the temperature-averaging flow channel plate, and an avoidance hole is arranged on the heat-insulating layer at a position corresponding to the injection nozzle.

9. The rubber cold runner system according to claim 8, characterized in that: The injection nozzle includes an injection tube and a connecting flange in the middle of the injection tube. The injection channel is arranged in the injection tube. One end of the injection tube is sealed and connected to the injection channel plate, and the other end is thermally matched with the temperature-averaging channel plate. The connecting flange is assembled in the avoidance hole.

10. The rubber cold runner system according to claim 9, characterized in that: A cooling channel is provided in the connecting flange, and a longitudinal through hole connected to the cooling channel is provided on the upper end surface of the connecting flange. An extension channel is provided at a position of the injection channel plate corresponding to the temperature control channel and the longitudinal through hole, and the extension channel is used to connect the temperature control channel and the longitudinal through hole.

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