Double-runner hot nozzle and hot runner system

Abstract

The utility model discloses a double-runner hot nozzle and a hot runner system, and belongs to the technical field of hot runner systems. The double-runner hot nozzle comprises a hot nozzle body and a valve needle assembly, the hot nozzle body is provided with a center hole, a first upper runner and a second upper runner, and the center hole extends in the axis direction of the hot nozzle body and is provided with a center hole upper section and a center hole lower section; the valve needle assembly comprises a sleeve piece and a valve needle, the sleeve piece is arranged in the center hole in a penetrating mode, the outer wall of the sleeve piece is attached to the inner wall of the upper section of the center hole in a sealed mode, and the outer wall of the sleeve piece is matched with the inner wall of the lower section of the center hole to form a first lower flow channel directly communicating with the first upper flow channel; the valve needle is arranged in the sleeve piece in a penetrating mode and matched with the inner wall of the sleeve piece to form a second lower runner, the sleeve piece is provided with a communicating hole communicating with the second upper runner and the second lower runner, the first upper runner and the first lower runner are used for supplying plastic of one color, and the second upper runner and the second lower runner are used for supplying plastic of the other color. Therefore, the double-color co-injection process of the double-runner hot nozzle is realized.

Description

Technical Field

[0001] The present application relates to the technical field of hot runner systems, and in particular to a dual-channel hot nozzle and a hot runner system. Background Art

[0002] Compared to conventional injection molds, hot runner systems offer advantages such as reduced plastic raw materials, reduced trimming, and ease of automated production. These advantages can improve production efficiency and product quality, while also reducing gel dissolution and injection times, ultimately shortening the molding cycle. However, while the two-color co-injection process is relatively mature in injection molds, its application in hot runner systems is still in the development stage.

[0003] Therefore, there is an urgent need for a dual-flow hot nozzle that can apply a hot runner system to solve the above problems. Utility Model Content

[0004] The purpose of the present application is to solve or at least alleviate part or all of the above problems. To this end, the purpose of the present application is to provide a dual-runner hot nozzle and a hot runner system that can realize a two-color co-injection process.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a dual-flow hot nozzle, comprising:

[0007] a hot nozzle body, the hot nozzle body having a central hole and a first upper flow channel and a second upper flow channel arranged around the central hole and communicating with the central hole, the central hole extending along the axis of the hot nozzle body and having a central hole upper section and a central hole lower section connected in sequence;

[0008] The valve needle assembly includes a kit and a valve needle. The kit is inserted into the center hole, and the outer wall of the kit is sealed with the inner wall of the upper section of the center hole. The outer wall of the kit cooperates with the inner wall of the lower section of the center hole to form a first lower flow channel directly connected to the first upper flow channel; the valve needle is inserted into the kit and cooperates with the inner wall of the kit to form a second lower flow channel, and the kit has a connecting hole connecting the second upper flow channel and the second lower flow channel.

[0009] As an optional solution for the dual-flow channel hot nozzle, the hot nozzle body further has an annular material storage trough located at the discharge end of the second upper flow channel, and the annular material storage trough is directly connected to the connecting hole.

[0010] As an optional solution for the dual-flow hot nozzle, the length of the annular material storage groove in the axial direction of the hot nozzle body is greater than the length of the connecting hole in the axial direction of the hot nozzle body.

[0011] As an optional solution of the dual-flow hot nozzle, the dual-flow hot nozzle further includes a heater, which is sleeved outside the hot nozzle body and is used to heat the hot nozzle body.

[0012] As an optional solution for the double-flow channel hot nozzle, the hot nozzle body further has a thermal sensor, and the thermal sensor is installed at the discharge end of the hot nozzle body.

[0013] As an optional solution for the dual-channel hot nozzle, a temperature-sensitive wire groove is provided on the outer peripheral wall of the hot nozzle body, and the temperature-sensitive wire groove cooperates with the inner wall of the heater to form an outlet channel for the temperature-sensitive wire bundle to pass through, and the end of the heater has an outlet avoidance groove connected to the outlet channel.

[0014] As an optional solution for the dual-channel hot nozzle, the dual-channel hot nozzle further includes a locking piece, the heater has a locking hole, the locking piece is threadedly connected to the locking hole, and can extend into the heater and abut against the hot nozzle body.

[0015] As an optional solution for the dual-flow hot nozzle, the hot nozzle body includes a first body and a second body detachably fixedly connected to the first body, the first upper flow channel and the second upper flow channel are opened in the first body, and the first body and the second body jointly form the center hole.

[0016] As an optional solution for the dual-flow hot nozzle, the second body is detachably fixedly connected to the first body via threads.

[0017] In a second aspect, the present application provides a hot runner system, comprising a template and the dual-runner hot nozzle as described above, wherein the dual-runner hot nozzle is installed on the template.

[0018] The beneficial effects of this application are:

[0019] The double-flow hot nozzle provided in the present application includes a hot nozzle body and a valve needle assembly, the hot nozzle body has a center hole, a first upper flow channel and a second upper flow channel, the center hole extends along the axial direction of the hot nozzle body and has an upper section of the center hole and a lower section of the center hole; the valve needle assembly includes a kit and a valve needle, the kit is passed through the center hole, and the outer wall of the kit is sealed with the inner wall of the upper section of the center hole, and the outer wall of the kit cooperates with the inner wall of the lower section of the center hole to form a first lower flow channel directly connected to the first upper flow channel; the valve needle is passed through the kit and cooperates with the inner wall of the kit to form a second lower flow channel, and the kit has a connecting hole connecting the second upper flow channel and the second lower flow channel, wherein the first upper flow channel and the first lower flow channel are used to supply plastic of one color, and the second upper flow channel and the second lower flow channel are used to supply plastic of another color, thereby realizing the two-color co-injection process of the double-flow hot nozzle.

[0020] The hot runner system provided in this application can realize a two-color co-injection process by applying the above-mentioned dual-runner hot nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present application and these drawings without any creative work.

[0022] Figure 1 It is a cross-sectional schematic diagram of the double-flow channel hot nozzle provided in an embodiment of the present application.

[0023] Reference numerals:

[0024] 1. Hot nozzle body; 101. First upper flow channel; 102. Second upper flow channel; 103. Annular material storage trough; 104. Outlet channel; 11. First body; 111. Mounting convex ring; 1111. Positioning hole; 12. Second body;

[0025] 2. Valve needle assembly; 201. First lower flow channel; 202. Second lower flow channel; 21. Kit; 211. Communication hole; 22. Valve needle;

[0026] 3. Heater; 31. Locking hole; 32. Wrench slot; 33. Wire avoidance slot;

[0027] 4. Thermal sensor. DETAILED DESCRIPTION

[0028] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0029] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0031] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0032] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0033] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0034] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0035] The present application provides a hot runner system, including a template and a dual-runner hot nozzle. The dual-runner hot nozzle is installed on the template. The dual-runner hot nozzle can realize two-color co-injection to enrich the diversity of hot runner system products and improve the market competitiveness of the hot runner system.

[0036] Figure 1 FIG. 1 shows a cross-sectional schematic diagram of a double-flow hot nozzle provided in an embodiment of the present application. Figure 1 As shown, the double-flow nozzle includes a nozzle body 1 and a valve needle assembly 2. The nozzle body 1 has a center hole and a first upper flow channel 101 and a second upper flow channel 102 arranged around the center hole and connected to the center hole. The center hole extends along the axial direction of the nozzle body 1, and the center hole has an upper center hole section and a lower center hole section connected in sequence; the valve needle assembly 2 includes a sleeve 21 and a valve needle 22. The sleeve 21 is inserted into the center hole, and the outer wall of the sleeve 21 is sealed with the inner wall of the upper center hole section, and the outer wall of the sleeve 21 is sealed with the inner wall of the lower center hole section. The inner walls cooperate to form a first lower flow channel 201 that is directly connected to the first upper flow channel 101; the valve needle 22 is inserted into the sleeve 21 and cooperates with the inner wall of the sleeve 21 to form a second lower flow channel 202. The sleeve 21 has a connecting hole 211 connecting the second upper flow channel 102 and the second lower flow channel 202, wherein the first upper flow channel 101 and the first lower flow channel 201 are used to supply plastic of one color, and the second upper flow channel 102 and the second lower flow channel 202 are used to supply plastic of another color, thereby realizing the two-color co-injection process of the double-flow hot nozzle.

[0037] It should be noted that the “upper” in the “first upper flow channel 101” and “second upper flow channel 102” and the “lower” in the “first lower flow channel 201” and “second lower flow channel 202” mentioned in this embodiment do not refer to the “upper” and “lower” in the actual spatial sense of the double-flow channel hot nozzle application, but are only used for reference. Figure 1 The viewing orientation is only used to distinguish different features and cannot be used as a limitation to the technical solution of this application.

[0038] In this embodiment, the outer wall of the sleeve 21 and the inner wall of the upper section of the center hole can be sealed with glue to prevent the plastic in the second upper flow channel 102 from flowing into the first lower flow channel 201 through the gap between the sleeve 21 and the upper section of the center hole.

[0039] The hot nozzle body 1 comprises a first body 11 and a second body 12 detachably fixedly connected to the first body 11. A first upper flow channel 101 and a second upper flow channel 102 are provided in the first body 11, and the first and second bodies 11, 12 together form a central hole. Specifically, the first body 11 defines the first and second upper flow channels 101, 102, and a portion of the central hole, while the second body 12 defines the remaining portion of the central hole. This arrangement facilitates the processing and manufacturing of the hot nozzle body 1, reducing manufacturing costs.

[0040] In this embodiment, the second body 12 is detachably fixedly connected to the first body 11 via threads. Specifically, the first body 11 has a threaded hole, and the second body 12 has a threaded connection protrusion, and the threaded connection protrusion of the second body 12 is threadedly connected to the threaded hole of the first body 11 to achieve a detachable fixed connection between the two.

[0041] The upper end of the first body 11 has a mounting collar 111, and the side of this collar 111 is provided with a positioning hole 1111. This positioning hole 1111 utilizes a positioning pin to position the nozzle body 1 on the template, preventing the nozzle body 1 from rotating. Furthermore, the outer contour of the lower end of the first body 11 matches the outer contour of the second body 12. When the two are assembled, the lower end of the nozzle body 1 has a good overall integrity, facilitating assembly of the nozzle body 1 with other components.

[0042] The hot nozzle body 1 also has an annular storage trough 103 located at the discharge end of the second upper flow channel 102. The annular storage trough 103 is directly connected to the communication hole 211. The annular storage trough 103 can be used to buffer the plastic, ensuring a stable and continuous supply of plastic in the second lower flow channel 202, thereby ensuring the quality of the finished product.

[0043] In this embodiment, the length of the annular material storage groove 103 in the axial direction of the hot nozzle body 1 is greater than the length of the connecting hole 211 in the axial direction of the hot nozzle body 1, so as to ensure that the plastic in the annular material storage groove 103 can stably and fully pass through the connecting hole 211 into the second lower flow channel 202.

[0044] In order to achieve continuous heating and heat preservation of the plastic in the nozzle body 1, the double-flow hot nozzle further includes a heater 3, which is sleeved outside the nozzle body 1 and is used to heat the nozzle body 1. In this embodiment, the heater 3 can be a heating steel sleeve.

[0045] The nozzle body 1 also includes a thermal sensor 4 mounted at the discharge end of the nozzle body 1. The thermal sensor 4 is in communication with the heater 3, allowing the heater 3 to control the heating temperature in real time based on the temperature detected by the thermal sensor 4. This ensures that the plastic in the nozzle body 1 is kept at an appropriate temperature, which is beneficial for product molding and improves product production efficiency.

[0046] The outer wall of the nozzle body 1 is provided with a temperature-sensitive wire groove. The temperature-sensitive wire groove cooperates with the inner wall of the heater 3 to form an outlet channel 104 for the temperature-sensitive wire harness to pass through. The end of the heater 3 is provided with an outlet avoidance groove 33 connected to the outlet channel 104. In actual assembly, after the nozzle body 1 is assembled, the thermal sensor 4 is installed at the lower end of the nozzle body 1. After the temperature-sensitive wire harness is electrically connected to the thermal sensor 4, it extends along the temperature-sensitive wire groove to the upper end of the nozzle body 1. The heater 3 is then sleeved on the nozzle body 1. Finally, the temperature-sensitive wire groove exits from the outlet avoidance groove 33 of the heater 3. This can prevent the heater 3 from squeezing the temperature-sensitive wire harness and extend the service life of the temperature-sensitive wire harness.

[0047] The dual-channel nozzle also includes a locking member. The heater 3 has a locking hole 31. The locking member is threadedly connected to the locking hole 31 and can extend into the heater 3 to abut the nozzle body 1. In this embodiment, the locking member can be a bolt, and the locking hole 31 is a threaded hole. In operation, the locking member is tightened into the locking hole 31 and abuts the nozzle body 1, preventing the heater 3 from separating from the nozzle body 1 and, to a certain extent, preventing relative rotation between the two.

[0048] In addition, the heater 3 is provided with a wrench slot 32 , which is used for assembling personnel to insert a wrench into the wrench slot 32 , so as to facilitate installation and disassembly of the heater 3 , thereby improving work efficiency.

[0049] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A double-flow hot nozzle, characterized in that: include: A hot nozzle body (1), the hot nozzle body (1) having a central hole and a first upper flow channel (101) and a second upper flow channel (102) arranged around the central hole and connected to the central hole, the central hole extending along the axial direction of the hot nozzle body (1), and the central hole having a central hole upper section and a central hole lower section connected in sequence; A valve needle assembly (2) comprises a kit (21) and a valve needle (22), wherein the kit (21) is inserted into the center hole, and the outer wall of the kit (21) is sealed and fitted with the inner wall of the upper section of the center hole, and the outer wall of the kit (21) cooperates with the inner wall of the lower section of the center hole to form a first lower flow channel (201) directly connected to the first upper flow channel (101); the valve needle (22) is inserted into the kit (21) and cooperates with the inner wall of the kit (21) to form a second lower flow channel (202), and the kit (21) has a connecting hole (211) connecting the second upper flow channel (102) and the second lower flow channel (202).

2. The double-flow hot nozzle according to claim 1, characterized in that: The hot nozzle body (1) further comprises an annular material storage trough (103) located at the discharge end of the second upper flow channel (102), and the annular material storage trough (103) is directly connected to the communicating hole (211).

3. The double-flow hot nozzle according to claim 2, characterized in that: The length of the annular material storage trough (103) in the axial direction of the hot nozzle body (1) is greater than the length of the connecting hole (211) in the axial direction of the hot nozzle body (1).

4. The double-flow hot nozzle according to claim 1, characterized in that: The double-flow hot nozzle further comprises a heater (3), which is sleeved outside the hot nozzle body (1) and is used to heat the hot nozzle body (1).

5. The double-flow hot nozzle according to claim 4, characterized in that: The hot nozzle body (1) further comprises a thermal sensor (4), and the thermal sensor (4) is installed at the discharge end of the hot nozzle body (1).

6. The double-flow hot nozzle according to claim 5, characterized in that: The outer peripheral wall of the hot nozzle body (1) is provided with a temperature sensing wire groove, and the temperature sensing wire groove cooperates with the inner wall of the heater (3) to form an outlet channel (104) for the temperature sensing wire bundle to pass through, and the end of the heater (3) is provided with an outlet avoidance groove (33) connected to the outlet channel (104).

7. The double-flow hot nozzle according to claim 4, characterized in that: The dual-flow hot nozzle further comprises a locking piece, the heater (3) has a locking hole (31), the locking piece is threadedly connected to the locking hole (31), and can extend into the heater (3) to abut against the hot nozzle body (1).

8. The double-flow hot nozzle according to any one of claims 1 to 7, characterized in that: The hot nozzle body (1) comprises a first body (11) and a second body (12) detachably fixedly connected to the first body (11); the first upper flow channel (101) and the second upper flow channel (102) are opened in the first body (11); the first body (11) and the second body (12) jointly form the center hole.

9. The double-flow hot nozzle according to claim 8, characterized in that: The second main body (12) is detachably fixedly connected to the first main body (11) via threads.

10. A hot runner system, characterized in that: It comprises a template and a double-flow hot nozzle according to any one of claims 1 to 9, wherein the double-flow hot nozzle is installed on the template.

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