Stack mold butt joint hot nozzle and hot runner structure

Abstract

The utility model discloses a stack mold butt joint hot nozzle and hot runner structure which comprises a fixed hot nozzle, a movable hot nozzle, a fixed nozzle tip, a sliding valve needle, a sliding nozzle tip and a fixed valve needle, the fixed nozzle tip and the sliding valve needle are arranged in the fixed hot nozzle, and the sliding nozzle tip and the fixed valve needle are arranged in the movable hot nozzle. A first reset assembly is arranged on one side of the fixed hot nozzle, and a second reset assembly is arranged in the movable hot nozzle. The movable hot nozzle is movably matched with the fixed hot nozzle, the fixed nozzle tip is propped against the sliding nozzle tip, and the fixed valve needle is propped against the sliding valve needle, so that the sliding nozzle tip and a pouring gate of the fixed hot nozzle are opened, the fixed hot nozzle is matched with a pouring gate of the movable hot nozzle, and two hot runners are communicated; the sliding nozzle tip and the sliding valve needle are reset under the action of the first reset assembly and the second reset assembly, and the two sprues are closed; the structure is simple and convenient, the procedure that an electric driving piece drives the valve needle to move is omitted, and the injection molding efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stack mold injection molding, in particular to a stack mold butting hot nozzle and a hot runner structure. Background Art

[0002] The stack mold is a cutting-edge technology in the development of plastic molds today. Unlike ordinary injection molds, it can mold multiple products at the same time. The cavities of multiple products are distributed on more than two levels and arranged in an overlapping manner. The stack mold is a cutting-edge technology in the development of plastic molds today. Unlike ordinary injection molds, it can mold multiple products at the same time. The cavities of multiple products are distributed on more than two levels and arranged in an overlapping manner.

[0003] The existing stack mold structure generally includes two hot nozzles for controlling the docking and separation of the mold opening and closing process. Both hot nozzles are provided with valve needles for controlling the opening and closing of the gates of the corresponding hot nozzles. The traditional valve needle is provided with an electric drive component such as a cylinder or an oil cylinder at the end away from the gate, and the output end of the electric drive component is connected to the valve needle. Specifically, the two hot nozzles are generally docked first, and then the two electric drives are started to move the two valve needles in the hot flow channel in the hot nozzles, so as to open the gates of the two hot nozzles and allow the plastic in the hot flow channel to flow. However, the above injection molding process is cumbersome and affects the efficiency of injection molding.

[0004] In view of this, the existing technology still needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a stacked mold docking hot nozzle and hot runner structure, aiming to solve the problem that the existing two valve needles are driven by an electric drive component, which makes the injection molding process complicated and affects the injection molding work efficiency.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0007] A stacked mold butt joint hot nozzle, comprising a fixed hot nozzle and a movable hot nozzle, and also comprising:

[0008] A fixed nozzle tip is arranged on the top of the fixed hot nozzle and protrudes from the fixed hot nozzle;

[0009] A sliding valve needle is arranged inside the fixed hot nozzle to close or open the gate of the fixed nozzle tip;

[0010] A sliding nozzle tip is arranged on the top of the movable hot nozzle; the sliding nozzle tip cooperates with the fixed nozzle tip;

[0011] A fixed valve needle is arranged inside the movable hot nozzle and is used to close the gate of the sliding nozzle tip; when the movable hot nozzle moves toward the fixed hot nozzle, the fixed nozzle tip pushes the sliding nozzle tip to slide, and the fixed valve needle pushes the sliding valve needle to move, so that the fixed hot nozzle is connected with the movable hot nozzle;

[0012] A first reset component, which is arranged at one side of the fixed hot nozzle and connected to the sliding valve needle, and is used for resetting the sliding valve needle;

[0013] The second resetting component is arranged inside the movable hot nozzle and connected to the sliding nozzle tip, and is used for resetting the sliding nozzle tip.

[0014] Furthermore, the first reset component includes:

[0015] A stopper, coaxially arranged on the sliding valve needle and located on one side of the fixed hot nozzle;

[0016] A first spring has one end arranged on a side of the stopper away from the movable hot nozzle, and the other end arranged on the template.

[0017] Furthermore, a stepped groove is provided at one end of the sliding valve needle away from the gate, and the side wall of the stepped groove is supported against the side wall of the stopper.

[0018] Furthermore, the second reset component includes:

[0019] A sliding groove is arranged in the movable hot nozzle;

[0020] The second spring is arranged in the sliding groove; one end of the second spring is supported against the bottom wall of the sliding groove, and the other end is supported against the sliding nozzle tip.

[0021] Furthermore, an annular protrusion is provided on the outer surface of the sliding nozzle tip, and the annular protrusion is slidably disposed in the sliding groove and abuts against the second spring.

[0022] Furthermore, the distance between the annular protrusion and two ends of the sliding nozzle tip is greater than the length of the sliding groove.

[0023] Furthermore, the outer diameter of the sliding nozzle tip is the same as the diameter of the heat flow channel of the movable hot nozzle.

[0024] Furthermore, a pressure cover is provided on the side facing the movable hot nozzle and the fixed hot nozzle, for fixing the sliding nozzle tip and the fixed nozzle tip.

[0025] Furthermore, heaters are provided outside the movable hot nozzle and the fixed hot nozzle.

[0026] A hot runner structure comprises the stacked mold butt hot nozzle as described above.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] In the utility model, a fixed hot nozzle is provided with a fixed nozzle tip and a sliding valve needle inside, a sliding nozzle tip and a fixed valve needle inside a movable hot nozzle, a first reset component is provided on one side of the fixed hot nozzle, and a second reset component is provided inside the movable hot nozzle; the movable hot nozzle is moved to cooperate with the fixed hot nozzle, and the fixed nozzle tip holds the sliding nozzle tip to slide inside the movable hot nozzle, and since the movable hot nozzle is provided with a fixed valve needle inside, the gate of the sliding nozzle tip is opened at this time, and as the movable hot nozzle moves, the fixed valve needle holds the sliding valve needle, so that the gate of the fixed hot nozzle is also opened, so that the gate of the fixed hot nozzle cooperates with the gate of the movable hot nozzle, and the two hot runners are connected, and when injection molding is completed, as the movable hot nozzle leaves, the sliding nozzle tip and the sliding valve needle are reset under the action of the first reset component and the second reset component, and the two gates are closed; the above structure is simple and convenient, saves the process of the electric drive component driving the valve needle to move, and effectively improves the efficiency of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the cross-sectional structure of the fixed hot nozzle and the movable hot nozzle of the utility model.

[0030] Figure 2 It is a schematic diagram of the cross-sectional structure of the fixed hot nozzle of the utility model.

[0031] Figure 3 It is a schematic diagram of the cross-sectional structure of the movable hot nozzle of the utility model.

[0032] Figure 4 It is a schematic diagram of the initial state structure of the fixed hot nozzle and the movable hot nozzle of the utility model.

[0033] Figure 5 It is a schematic diagram of the docking structure of the fixed hot nozzle and the movable hot nozzle of the utility model.

[0034] Figure 6 It is a schematic diagram of the communication structure between the fixed hot nozzle and the movable hot nozzle of the utility model.

[0035] Figure 7 It is a schematic diagram of the hot runner structure of the utility model.

[0036] The numbers in the figure are as follows: 1. fixed hot nozzle; 11. fixed nozzle tip; 12. sliding valve needle; 2. movable hot nozzle; 21. sliding nozzle tip; 22. fixed valve needle; 3. first reset assembly; 31. stopper; 32. first spring; 33. stepped groove; 4. second reset assembly; 41. sliding groove; 42. second spring; 43. annular protrusion; 5. pressure cover; 6. heater. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] As attached Figure 1 , Attachment Figure 2 and attached Figure 3As shown, a stacked mold docking hot nozzle comprises a fixed hot nozzle 1, a movable hot nozzle 2, a fixed nozzle tip 11, a sliding valve needle 12, a sliding nozzle tip 21, a fixed valve needle 22, a first reset component 3 and a second reset component 4; the fixed hot nozzle 1 is a structure fixed on the fixed mold template, the movable hot nozzle 2 is a structure fixed on the movable mold template, the movable hot nozzle 2 is connected to an external injection molding machine, and through an external drive component (the external drive component is a prior art), the movable hot nozzle 2 can be moved toward the fixed hot nozzle 1 and cooperate with each other; the fixed hot nozzle 1 is provided with a fixed nozzle tip 11 inside, and is located at the top of the fixed hot nozzle 1, that is, close to one end of the movable hot nozzle 2, the fixed nozzle tip 11 protrudes from the surface of the fixed hot nozzle 1, and the fixed hot nozzle 1 is also provided with a sliding valve needle 1 2, the sliding valve needle 12 can slide along the length direction of the fixed hot nozzle 1 to close and open the gate on the fixed nozzle tip 11; the sliding nozzle tip 21 is arranged inside the mobile hot nozzle 2, and is located at the top of the mobile hot nozzle 2, that is, one end close to the fixed hot nozzle 1, the sliding nozzle tip 21 is flush with the outer surface of the mobile hot nozzle 2, and the mobile hot nozzle 2 is also provided with a fixed valve needle 22 inside, that is, the fixed valve needle 22 and the mobile hot nozzle 2 are in a fixed state, and the sliding nozzle tip 21 slides to close and open the gate of the sliding nozzle tip 21; the fixed hot nozzle 1 is also provided with a first reset component 3 on the side away from the mobile hot nozzle 2 for resetting the sliding valve needle 12; the mobile hot nozzle 2 is also provided with a second reset component 4 inside the mobile hot nozzle 2 for resetting the sliding nozzle tip 21.

[0041] Specifically, in the initial state (such as the attached Figure 4 As shown in the figure, the sliding valve needle 12 closes the gate of the fixed nozzle tip 11 under the action of the first reset component 3, and the gate of the sliding nozzle tip 21 is closed by the fixed valve needle 22 under the action of the second reset component 4; when the injection molding is performed, the mobile hot nozzle 2 moves towards the direction close to the fixed hot nozzle 1 under the action of the external driving component, and as the mobile hot nozzle 2 moves, the sliding nozzle tip 21 of the mobile hot nozzle 2 abuts against the fixed nozzle tip 11 of the fixed hot nozzle 1 (as shown in the figure). Figure 5 As shown in the figure), and under the continuous movement, the fixed nozzle tip 11 holds the sliding nozzle tip 21, and the sliding nozzle tip 21 slides toward the inside of the mobile hot nozzle 2. At this time, the sliding nozzle tip 21 moves, and the fixed valve needle 22 does not move. The gate of the sliding nozzle tip 21 is opened, and one end of the fixed valve needle 22 also extends into the gate of the fixed nozzle tip 11. As the mobile hot nozzle 2 continues to move, the fixed valve needle 22 is held on the surface of the sliding valve needle 12, and the sliding valve needle 12 slides toward the inside of the fixed hot nozzle 1. At this time, the gate of the fixed nozzle tip 11 is opened, so that the hot flow channels of the fixed hot nozzle 1 and the mobile hot nozzle 2 are connected (as shown in the figure). Figure 6 As shown), you can start the injection molding work;

[0042] When the injection molding work is completed and the mold needs to be opened, the mobile hot nozzle 2 will move away from the fixed hot nozzle 1 under the action of the external driving component. During the movement, under the action of the second reset component 4, the sliding nozzle tip 21 continues to be held against the fixed nozzle tip 11, and under the action of the first reset component 3, the sliding valve needle 12 also continues to be held against the fixed valve needle 22 until the sliding nozzle tip 21 is reset. At this time, the fixed valve needle 22 closes the gate of the sliding nozzle tip 21, and the sliding valve needle 12 closes the gate of the fixed hot nozzle 1 under the action of the first reset component 3, and the mobile hot nozzle 2 is separated from the fixed hot nozzle 1 under the action of the driving component, thereby completing the mold opening process; the above-mentioned stacking mold docking process only needs to move the mobile hot nozzle 2 toward the fixed hot nozzle 1 to achieve the connection between the two heat flow channels, and there is no need to drive the valve needle to open the gate through the electric drive component; through the above-mentioned structure, the injection molding work efficiency can be effectively improved.

[0043] Furthermore, the gate of the mobile hot nozzle 2 is a straight hole, and an arc-shaped through hole is arranged on one side of the straight hole close to the heat flow channel inside the mobile hot nozzle 2, and the cross-section of the fixed valve needle 22 is a "T" shape, that is, the top of the fixed valve needle 22 is a large-diameter end, and the part located in the heat flow channel of the mobile hot nozzle 2 is a small-diameter end, the small-diameter end is smaller than the diameter of the straight hole and the through-hole diameter of the arc-shaped through hole, and the large-diameter end of the fixed valve needle 22 is used to cooperate with the straight hole of the gate to close the gate; the gate of the fixed hot nozzle 1 is also a straight hole, and an arc-shaped through hole is arranged on one side of the straight hole close to the heat flow channel inside the fixed hot nozzle 1 The top of the sliding valve needle 12 is provided with a small diameter cylinder for closing the gate. The end of the sliding valve needle 12 away from the mobile hot nozzle 2 is the large diameter end. The large diameter end of the sliding valve needle 12 can be supported on the side wall of the arc-shaped through hole of the fixed hot nozzle 1, and the large diameter end is smaller than the through hole diameter in the arc-shaped through hole. At this time, the small diameter cylinder of the sliding valve needle 12 closes the gate, and the large diameter end of the sliding valve needle 12 plays a limiting role to prevent the sliding valve needle 12 from protruding from the surface of the fixed hot nozzle 1 under the action of the first reset component 3; the straight hole diameters of the gates of the fixed hot nozzle 1 and the mobile hot nozzle 2 are the same;

[0044] When the movable hot nozzle 2 cooperates with the fixed hot nozzle 1, the fixed valve needle 22 will hold the sliding valve needle 12, and both will be located in the hot flow channel of the fixed hot nozzle 1 at the same time (as shown in the attached Figure 6 As shown), at this time, the small diameter end of the fixed valve needle 22 is located in the straight holes of the two gates, and the small diameter section of the fixed valve needle 22 is smaller than the diameter of the gate, so that the heat flow channel of the fixed hot nozzle 1 is connected with the heat flow channel of the movable hot nozzle 2.

[0045] As attached Figure 2As shown, the first reset component 3 includes a block 31 and a first spring 32. The baffle is coaxially arranged on the sliding valve needle 12 and connected to the sliding valve needle 12. The first spring 32 is coaxially arranged with the sliding valve needle 12, and one end of the first spring 32 is arranged on the template, and the other end is arranged on the side of the block 31 away from the movable hot nozzle 2 to provide a supporting force for the sliding valve needle 12; when the fixed valve needle 22 holds the sliding valve needle 12, the sliding valve needle 12 moves toward the side away from the movable hot nozzle 2 and compresses the first spring 32; when the injection molding is completed, the movable hot nozzle 2 leaves, and the sliding valve needle 12 slides toward the direction close to the movable hot nozzle 2 under the action of the first spring 32, and closes the gate of the fixed hot nozzle 1.

[0046] In this embodiment, as shown in the attached Figure 2 As shown, a stepped groove 33 is provided at one end of the sliding valve needle 12 away from the gate. The setting of the stepped groove 33 makes one end of the sliding valve needle 12 a small diameter cylinder, which cooperates with the through hole in the middle of the stopper 31. The stopper 31 is slidably set on the small diameter cylinder and can be easily disassembled. At the same time, after the stopper 31 is set on the small diameter cylinder, it is under the action of the first spring 32 and cooperates with the side wall of the stepped groove 33, so that the first spring 32 can act on the sliding valve needle 12.

[0047] As attached Figure 3 As shown, the second reset component 4 includes a sliding groove 41 and a second spring 42. The sliding groove 41 is arranged in the mobile hot nozzle 2 and is opened on the heat flow channel in the mobile hot nozzle 2. The sliding nozzle tip 21 is slidably arranged in the sliding groove 41. The second spring 42 is arranged in the sliding groove 41, and one end of the second spring 42 is supported by the bottom wall of the sliding groove 41 (that is, the side of the sliding groove 41 away from the fixed hot nozzle 1), and the other end is supported by the sliding nozzle tip 21 to increase the supporting force to the sliding nozzle tip 21.

[0048] In this embodiment, an annular protrusion 43 is provided on the outer surface of the sliding nozzle tip 21, and the annular protrusion 43 is slidably set in the sliding groove 41, and the side wall of the sliding groove 41 close to the fixed hot nozzle 1 and the side wall away from the fixed hot nozzle 1 are used to limit the sliding of the sliding nozzle tip 21, so that the sliding nozzle tip 21 does not slide out of the movable hot nozzle 2; one side of the annular protrusion 43 abuts against the second spring 42 to facilitate the elastic force of the second spring 42 to act on the sliding nozzle tip 21.

[0049] In this embodiment, the sliding groove 41 has a certain length to facilitate the sliding nozzle tip 21 to slide from a position flush with the surface of the mobile hot nozzle 2 to the inside of the mobile hot nozzle 2. During the sliding process of the sliding nozzle tip 21, the sliding groove 41 needs to be closed to prevent plastic from flowing into the sliding groove 41 and to prevent the second spring 42 from being compressed and reset.

[0050] By making the distance between the annular protrusion 43 and the two ends of the sliding nozzle tip 21 greater than the length of the sliding groove 41, the sliding groove 41 and the heat flow channel of the mobile hot nozzle 2 can be closed; when the sliding nozzle tip 21 is in the initial state, the end of the sliding nozzle tip 21 away from the fixed hot nozzle 1 will close the sliding groove 41; when the sliding nozzle tip 21 is in the injection molding state, the sliding nozzle tip 21 slides into the mobile hot nozzle 2, and the sliding groove 41 is closed by the end of the sliding nozzle tip 21 close to the fixed hot nozzle 1.

[0051] The outer diameter of the sliding nozzle tip 21 is the same as the diameter of the hot flow channel of the movable hot nozzle 2, so that the sliding groove 41 can be closed.

[0052] In this embodiment, as shown in the attached Figure 2 and attached Figure 3 As shown, a pressure cover 5 is provided on the side facing the mobile hot nozzle 2 and the fixed hot nozzle 1, and the sliding groove 41 of the mobile hot nozzle 2 can extend outside the mobile hot nozzle 2, and the pressure cover 5 of the mobile hot nozzle 2 is arranged at the top position of the sliding groove 41 at the mobile hot nozzle 2, and cooperates with the side wall of the sliding groove 41 away from the fixed hot nozzle 1 to limit the sliding nozzle tip 21; a fixed groove is provided on the top of the fixed hot nozzle 1, and the fixed nozzle tip 11 is arranged in the fixed groove, and the pressure cover 5 of the fixed hot nozzle 1 cooperates with the fixed groove to fix the fixed nozzle tip 11.

[0053] As attached Figure 2 and attached Figure 3 As shown, heaters 6 are provided outside the movable hot nozzle 2 and the fixed hot nozzle 1.

[0054] As attached Figure 7 As shown, the present application also provides a hot runner structure, including the stacked mold butt hot nozzle as described above.

[0055] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the solutions disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present solution. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

Claims

1. A stacked mold butt hot nozzle, comprising a fixed hot nozzle and a movable hot nozzle, characterized in that: Also includes: A fixed nozzle tip is arranged on the top of the fixed hot nozzle and protrudes from the fixed hot nozzle; A sliding valve needle is arranged inside the fixed hot nozzle to close or open the gate of the fixed nozzle tip; A sliding nozzle tip is arranged on the top of the movable hot nozzle; the sliding nozzle tip cooperates with the fixed nozzle tip; A fixed valve needle is arranged inside the movable hot nozzle and is used to close the gate of the sliding nozzle tip; when the movable hot nozzle moves toward the fixed hot nozzle, the fixed nozzle tip pushes the sliding nozzle tip to slide, and the fixed valve needle pushes the sliding valve needle to move, so that the fixed hot nozzle is connected with the movable hot nozzle; A first reset component, which is arranged at one side of the fixed hot nozzle and connected to the sliding valve needle, and is used for resetting the sliding valve needle; The second resetting component is arranged inside the movable hot nozzle and connected to the sliding nozzle tip, and is used for resetting the sliding nozzle tip.

2. A stacked mold butt hot nozzle according to claim 1, characterized in that: The first reset component comprises: A stopper, coaxially arranged on the sliding valve needle and located on one side of the fixed hot nozzle; A first spring has one end arranged on a side of the stopper away from the movable hot nozzle, and the other end arranged on the template.

3. A stacked mold butt hot nozzle according to claim 2, characterized in that: A stepped groove is arranged at one end of the sliding valve needle away from the gate, and the side wall of the stepped groove is supported against the side wall of the stopper.

4. A stacked mold butt hot nozzle according to claim 1, characterized in that: The second reset component comprises: A sliding groove is arranged in the movable hot nozzle; The second spring is arranged in the sliding groove; one end of the second spring is supported against the bottom wall of the sliding groove, and the other end is supported against the sliding nozzle tip.

5. A stacked mold butt hot nozzle according to claim 4, characterized in that: The outer surface of the sliding nozzle tip is provided with an annular protrusion, and the annular protrusion is slidably arranged in the sliding groove and abuts against the second spring.

6. A stacked mold butt hot nozzle according to claim 5, characterized in that: The distance between the annular protrusion and two ends of the sliding nozzle tip is greater than the length of the sliding groove.

7. A stacked mold butt hot nozzle according to claim 6, characterized in that: The outer diameter of the sliding nozzle tip is the same as the diameter of the heat flow channel of the moving hot nozzle.

8. The stack mold butt joint hot nozzle according to claim 1, characterized in that: The movable hot nozzle and the fixed hot nozzle are both provided with a pressure cover on the side facing each other, which is used to fix the sliding nozzle tip and the fixed nozzle tip.

9. The stack mold butt joint hot nozzle according to claim 1, characterized in that: Heaters are arranged outside the movable hot nozzle and the fixed hot nozzle.

10. A hot runner structure, characterized in that: It comprises a stack mold butt hot nozzle as described in any one of claims 1-9.

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