Hot nozzle cooling water jacket
By designing a cooling water jacket for the hot nozzle and adopting a limiting ring and flow groove structure, friction damage to the sealing ring is avoided, solving the problems of uneven temperature of the hot nozzle and easy damage to the sealing ring, thus achieving a higher waterproof effect and yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG YUNSHENG TECHNOLOGY CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-26
AI Technical Summary
In existing hot runner systems, the high temperature of the hot nozzles causes uneven temperature at the gate, affecting the cut-off of the glue. Furthermore, the sealing rings are prone to leakage due to friction damage, reducing the yield and prolonging the injection molding cycle.
A hot nozzle cooling water jacket is designed. The inner sleeve does not have a sealing ring. Instead, it uses upper and lower limit rings and a flow groove structure to avoid friction between the inner and outer sleeve walls. Combined with the sealing cap and cooling pipe of the outer sleeve, it achieves effective cooling and waterproofing.
By avoiding friction damage to the sealing ring, the waterproof effect of the inner and outer cylinder walls is improved, ensuring the sealing performance of the cooling water jacket, increasing the yield rate and shortening the injection molding cycle.
Smart Images
Figure CN224276010U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot runner technology, and in particular to a hot nozzle cooling water jacket. Background Technology
[0002] In hot runner heating devices, the high temperature of the hot nozzles leads to localized high temperatures at the gate. During product cooling, the melt at the gate solidifies slowly due to the excessively high temperature, affecting the gate's sealant cutoff. This results in hot melt residue easily appearing on the product surface near the gate, leading to low yield and long injection molding cycles. Gate temperature is typically regulated by cooling water channels around the mold gate. Due to limitations in mold manufacturing, it's impossible to ensure uniform temperature by circling the gate with cooling water channels. Therefore, a cooling water jacket is needed to achieve this.
[0003] The cooling water jacket consists of a stainless steel body and rubber sealing rings. There are two sealing rings, one at the top and one at the bottom, to prevent water from entering the mold. Currently, the sealing rings are fitted onto the outer wall of the inner sleeve, and the cooling water jacket is installed into the mold from top to bottom. This requires very high precision in mold clearance. However, due to its structure, the sealing rings are often damaged by friction during installation, leading to leaks. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a hot nozzle cooling water jacket.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A hot nozzle cooling water jacket includes: an inner sleeve, an outer sleeve fitted on the inner sleeve, and a cooling cavity disposed between the outer sleeve and the inner sleeve, characterized in that: the inner sleeve is provided with an upper sealing ring and a lower sealing ring, and neither the upper sealing ring nor the lower sealing ring is disposed on the cylinder wall of the inner sleeve.
[0007] Preferably, the inner sleeve includes an upper limit ring, an upper cylinder disposed below the upper limit ring, a lower cylinder disposed below the upper cylinder, and a lower limit ring disposed below the lower cylinder; the upper sealing ring is installed below the upper limit ring; the lower sealing ring is installed below the lower limit ring; a flow groove is formed on the upper cylinder; the flow groove communicates with the cooling cavity.
[0008] Preferably, there are two flow channels, which are respectively arranged on both sides of the upper cylinder and are symmetrically arranged.
[0009] Preferably, the outer sleeve includes an upper sealing cover, an outer cylinder disposed below the upper sealing cover, and a lower sealing cover disposed on the outer cylinder; the outer cylinder is provided with a cooling pipe.
[0010] Preferably, there are two cooling pipes, which are respectively arranged on both sides of the outer cylinder and are symmetrically arranged.
[0011] Compared with the prior art, this application has the following beneficial effects:
[0012] This invention avoids placing the upper and lower sealing rings on the inner sleeve wall. When the inner sleeve is embedded in the outer sleeve, the sealing rings and lower sealing rings will not be damaged by friction due to the vertical friction between the two sleeve walls, thus effectively improving the waterproof effect between the inner and outer sleeve walls. Attached Figure Description
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.
[0014] Figure 1 This is a schematic diagram of the structure of a hot nozzle cooling water jacket according to the present invention;
[0015] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;
[0016] Figure 3 for Figure 2 Schematic diagram of the inner sleeve;
[0017] Figure 4 for Figure 2 A schematic diagram of the structure of the inner and outer jacket. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0020] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0021] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.
[0022] Example 1:
[0023] like Figure 1 and Figure 2 As shown, a hot nozzle cooling water jacket includes: an inner sleeve 10, an outer sleeve 20 sleeved on the inner sleeve 10, and a cooling cavity 30 disposed between the outer sleeve 20 and the inner sleeve 10. The inner sleeve 10 is characterized in that: the inner sleeve 10 is provided with an upper sealing ring 15 and a lower sealing ring 17, and neither the upper sealing ring 15 nor the lower sealing ring 17 is disposed on the cylinder wall of the inner sleeve 10.
[0024] The hot nozzle cooling water jacket does not place the upper sealing ring 15 and the lower sealing ring 17 on the inner sleeve 10 cylinder wall, which can effectively avoid the friction between the inner and outer cylinder walls when the inner sleeve 10 is embedded in the outer sleeve 20. This effectively prevents damage to the upper sealing ring 15 and the lower sealing ring 17 caused by friction, thereby effectively improving the waterproof effect between the inner sleeve 10 and the outer sleeve 20.
[0025] The cooling chamber 30 between the outer sleeve 20 and the inner sleeve 10 is a chamber where cooling water gathers and is used to cool the hot nozzle.
[0026] like Figure 3As shown, the inner sleeve 10 includes an upper limit ring 11, an upper sleeve 12 disposed below the upper limit ring 11, a lower sleeve 13 disposed below the upper sleeve 12, and a lower limit ring 14 disposed below the lower sleeve 13; the upper sealing ring 15 is installed below the upper limit ring 11; the lower sealing ring 17 is installed below the lower limit ring 14; the upper sleeve 12 has a flow groove 16; the flow groove 16 communicates with the cooling cavity 30; there are two flow grooves 16, which are respectively disposed on both sides of the upper sleeve 12 and are arranged symmetrically on the left and right.
[0027] The inner sleeve 10 is embedded in the outer sleeve 20, mainly causing vertical friction between the inner and outer sleeve walls. Therefore, the inner sleeve 10 is designed with an upper limit ring 11 and a lower limit ring 14 for installing the upper sealing ring 15 and the lower sealing ring 17. The upper sealing ring 15 and the lower sealing ring 17 are respectively installed on the lower side of the upper limit ring 11 and the lower limit ring 14 (e.g., Figure 3 This design can effectively avoid the vertical friction when the inner sleeve 10 is installed on the inner wall of the outer sleeve 20.
[0028] The flow channel 16 has two sections: one can be used as a channel for cooling water to enter, and the other can be used as a channel for cooling water to exit.
[0029] like Figure 4 As shown, the outer sleeve 20 includes an upper sealing cover 21, an outer sleeve 22 disposed below the upper sealing cover 21, and a lower sealing cover 24 disposed on the outer sleeve 22; the outer sleeve 22 is provided with cooling pipes 23; there are two cooling pipes 23, which are respectively disposed on both sides of the outer sleeve 22 and arranged symmetrically from left to right.
[0030] When the inner sleeve 10 is installed inside the outer sleeve 20, the upper sealing cover 21 fits tightly against the upper limit ring 11, and the upper sealing ring 15 is clamped between the two; the lower sealing cover 24 fits tightly against the lower limit ring 14, and the lower sealing ring 17 is clamped between the two.
[0031] There are two cooling pipes 23, which are used for the entry and exit of cooling water. The two cooling pipes 23 are respectively connected to two flow channels 16, so that the cooling water can flow into the cooling chamber 30 and be discharged outward from the cooling chamber 30.
[0032] 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.
Claims
1. A hot runner cooling water jacket, comprising an inner sleeve (10), an outer sleeve (20) sleeved on the inner sleeve (10), and a cooling cavity (30) disposed between the outer sleeve (20) and the inner sleeve (10), characterized in that: The inner sleeve (10) is provided with an upper sealing ring (15) and a lower sealing ring (17), and neither the upper sealing ring (15) nor the lower sealing ring (17) is provided on the cylinder wall of the inner sleeve (10).
2. The hot nozzle cooling water jacket according to claim 1, characterized in that: The inner sleeve (10) includes an upper limit ring (11), an upper cylinder (12) disposed below the upper limit ring (11), a lower cylinder (13) disposed below the upper cylinder (12), and a lower limit ring (14) disposed below the lower cylinder (13); the upper sealing ring (15) is installed below the upper limit ring (11); the lower sealing ring (17) is installed below the lower limit ring (14); a flow groove (16) is formed on the upper cylinder (12); the flow groove (16) communicates with the cooling cavity (30).
3. A hot nozzle cooling water jacket according to claim 2, characterized in that: Two flow channels (16) are provided, respectively located on both sides of the upper cylinder (12) and arranged symmetrically on the left and right.
4. A hot nozzle cooling water jacket according to claim 1, characterized in that: The outer sleeve (20) includes an upper sealing cover (21), an outer cylinder (22) disposed under the upper sealing cover (21), and a lower sealing cover (24) disposed on the outer cylinder (22); the outer cylinder (22) is provided with a cooling pipe (23).
5. A hot nozzle cooling water jacket according to claim 4, characterized in that: The cooling pipe (23) is provided in two parts, which are respectively located on both sides of the outer cylinder (22) and arranged symmetrically on the left and right.