Improved valve needle and stack mold butt joint structure

Abstract

The utility model discloses an improved valve needle and stack mold butt joint structure, which comprises an inclined needle, an inclined plane arranged on the inclined needle and a material pulling groove, the top of the inclined needle is provided with the inclined plane, so that the top of the inclined needle is arranged in a conical shape, and the inclined plane is provided with the material pulling groove; through the arrangement of the material pulling groove, after the straight needle of the first hot nozzle and the inclined needle of the second hot nozzle are in butt joint to form the material handle, the material handle can be fixed so as to prevent the material handle from being taken away by the straight needle and falling on a mold core when the first hot nozzle and the second hot nozzle are subjected to mold opening; and the material handle and the inclined needle are fixed through the material pulling groove, so that the process of cleaning the material handle can be reduced, and the production efficiency of the stack mold is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to an improved valve needle and stacked mold docking 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 processes. A straight valve needle and an inclined valve needle are respectively arranged inside the two hot nozzles. When the mold needs to be closed, the two valve needles are docked and molded in the docking structure. Due to the processing accuracy or docking accuracy of the two valve needles, a gap will be formed between the two valve needles, and when the valve needles are sealed with glue, plastic will remain in the gap. After the plastic is cooled, a material handle will be formed in the gap, and when the mold is opened, the material handle will be brought out with the straight needle and fall on the surface of the mold core. At this time, the material handle needs to be cleaned, which will increase the cleaning process and reduce production efficiency.

[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 in the prior art, the purpose of the present invention is to provide an improved valve needle and stacking mold docking structure, aiming to solve the problem that a material handle will be formed between the two valve needles and will be brought out when the mold is opened, thereby increasing the cleaning process and reducing production efficiency.

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

[0007] An improved valve needle, comprising an inclined needle, further comprising:

[0008] An inclined plane is arranged at the top of the inclined needle so that the top of the inclined needle is arranged in a cone shape;

[0009] The material pulling groove is arranged on the inclined surface of the inclined needle and is used for fixing the material handle.

[0010] Furthermore, the cross-section of the pulling trough is fan-shaped, triangular or trapezoidal.

[0011] Furthermore, the pulling groove is arranged around the inclined surface of the inclined needle.

[0012] Furthermore, the pulling groove is located at the bottom of the upper surface of the inclined needle.

[0013] Furthermore, the inner surface of the pulling trough is connected to the inclined surface through a curved surface.

[0014] A stack mold docking structure, comprising the improved valve needle as described above, further comprising:

[0015] A first mold core; a first hot nozzle is disposed on one side of the first mold core;

[0016] A straight needle, slidably disposed inside the first hot nozzle, for closing or opening the gate of the first hot nozzle;

[0017] The second mold core is arranged on a side of the first mold core away from the first hot nozzle; a second hot nozzle is arranged on the side of the second mold core away from the first mold core, and the oblique needle is slidably arranged in the second hot nozzle to close or open the gate of the second hot nozzle;

[0018] Symmetrical docking holes are respectively provided inside the first mold core and the second mold core. The two docking holes correspond to the gate of the first hot nozzle and the gate of the second hot nozzle respectively, and are used for docking the straight needle with the oblique needle.

[0019] Furthermore, heaters are disposed outside the first hot nozzle and the second hot nozzle.

[0020] Furthermore, the first mold core and the second mold core are respectively connected and fixed to the upper and lower mold plates by screws.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] In the utility model, an inclined surface is arranged on the top of the inclined needle so that the top of the inclined needle is arranged in a cone shape, and a material pulling groove is opened on the inclined surface; through the setting of the material pulling groove, after the straight needle of the first hot nozzle and the inclined needle of the second hot nozzle are connected to form a material handle, the material handle can be fixed to prevent the straight needle from taking away the material handle and falling on the mold core when the first hot nozzle and the second hot nozzle open the mold; through the material pulling groove, the material handle and the inclined needle are fixed, which can reduce the cleaning process of the material handle, thereby improving the production efficiency of the stacking mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the stacking mold docking structure in the prior art.

[0024] Figure 2 It is a schematic diagram of the material handle structure in the prior art.

[0025] Figure 3 It is a schematic diagram of the mold opening structure in the prior art.

[0026] Figure 4 It is a schematic diagram of the stacking mold docking structure of the utility model.

[0027] Figure 5 It is a schematic diagram of the mold closing structure of the stacked mold structure of the utility model.

[0028] Figure 6 It is a schematic diagram of the mold opening structure of the stacked mold structure of the utility model.

[0029] Figure 7 It is a schematic diagram of the second mold core and the oblique needle structure of the utility model.

[0030] The numbers in the figure indicate: 1, oblique needle; 11, inclined surface; 12, pulling groove; 2, first mold core; 3, first hot nozzle; 4, straight needle; 5, second mold core; 6, second hot nozzle; 7, material handle. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, when the existing stacked mold structure is working, the first hot nozzle 3 and the first mold core 2 are moved toward the second hot nozzle 6 and the second mold core 5 under the external driving device, the first mold core 2 and the second mold core 5 cooperate, and the first hot nozzle 3 can inject glue into the second hot nozzle 6, and the second hot nozzle 6 performs injection molding through the internal heat flow channel; when the injection molding work is completed, the first hot nozzle 3 and the second hot nozzle 6 need to be separated, and the first hot nozzle 3 and the second hot nozzle 6 need to be sealed with glue before separation, and the straight needle 4 of the first hot nozzle 3 and the oblique needle 1 of the second hot nozzle 6 are used to close the gate , and the two will also be aligned. When the oblique needle 1 and the straight needle 4 are sealed and aligned, a gap will be generated between the two, and some plastic will remain in the gap, which will form a material handle 7 after cooling. As the first hot nozzle 3 and the second hot nozzle 6 are separated, the straight needle 4 of the first hot nozzle 3 will pull the material handle 7 to move and may fall on the second mold core 5. If it is not cleaned in time, it will affect the next mold closing; therefore, the surfaces of the second mold core 5 and the first mold core 2 are generally cleaned before mold closing, which will increase the cleaning process and reduce production efficiency.

[0035] In view of the shortcomings of the prior art, this embodiment provides an improved valve needle and stack mold docking structure, which can be specifically described as follows:

[0036] As attached Figure 4 , Attachment Figure 5 and attached Figure 7 As shown, an improved valve needle comprises an inclined needle 1, an inclined surface 11 arranged on the inclined needle 1, and a pulling groove 12. The inclined needle 1 is a valve needle in the second hot nozzle 6, which can be moved under an external driving device to close or open the gate of the second hot nozzle 6. The top of the inclined needle 1 is provided with an inclined surface 11, so that the top of the inclined needle 1 is arranged in a conical shape, and its cross section is a trapezoid. By providing the inclined surface 11 on the inclined needle 1, it is not only convenient for the inclined needle 1 to seal the second hot nozzle 6, but also convenient for the first hot nozzle 3 to seal the second hot nozzle 6. The straight needle 4 is matched with the straight needle 4 to reduce the matching accuracy and improve the work efficiency; the inclined surface 11 of the inclined needle 1 is also provided with an inwardly recessed material pulling groove 12, which can fix the material handle 7 after the straight needle 4 of the first hot nozzle 3 and the inclined needle 1 of the second hot nozzle 6 are connected to form a material handle 7, so as to prevent the straight needle 4 from taking away the material handle 7 and falling on the mold core when the first hot nozzle 3 and the second hot nozzle 6 are opened, thereby achieving the effect of reducing the cleaning process of the material handle 7, thereby improving the production efficiency of the stacking mold.

[0037] Furthermore, when the straight needle 4 is docked with the oblique needle 1, the straight needle 4 will extend into the second mold core 5, that is, the material handle 7 will be formed in the second mold core 5. When the mold is opened, the material handle 7 will move under the movement of the straight needle 4, and the material handle 7 will also be stuck in the second mold core 5 and stuck in the docking hole of the second mold core 5. When the mold is closed again, the stuck material handle 7 will affect the docking between the first mold core 2 and the second mold core 5 and the first hot nozzle 3 and the second hot nozzle 6, thereby affecting the production efficiency. By providing a pulling groove 12 on the inclined surface 11 of the oblique needle 1, the material handle 7 can be relatively fixed to the oblique needle 1 when the mold is opened (as shown in the attached figure). Figure 6 ) to prevent it from moving as the pointer moves.

[0038] In one embodiment of the present application, the cross-section of the pulling trough 12 is fan-shaped, triangular or trapezoidal; preferably, the cross-section of the pulling trough 12 is fan-shaped. The fan-shaped setting is convenient for cleaning the material handle 7 and for making the material handle 7 separate from the pulling trough 12. It is also convenient for the plastic to flow to the inclined surface 11 after heating the material handle 7 until it flows into the hot flow channel of the second hot nozzle 6.

[0039] Furthermore, the upper and lower sides of the pulling trough 12 are transitioned to the inclined surface 11 through an arc surface, that is, there is an arc surface between the inner wall of the pulling trough 12 and the inclined surface 11, so that the material handle 7 can flow along the inner wall and the arc surface of the pulling trough 12 to the inclined surface 11 after heating, and then flow into the heat flow channel of the second hot nozzle 6.

[0040] In one embodiment of the present application, the pulling groove 12 is arranged in a surrounding manner on the inclined surface 11 of the inclined needle 1, that is, the pulling groove 12 is arranged in a ring shape and is coaxially arranged with the inclined needle 1. By increasing the contact area between the material handle 7 and the pulling groove 12, the connection stability between the material handle 7 and the inclined needle 1 is reinforced.

[0041] In one embodiment of the present application, a plurality of pulling grooves 12 are evenly distributed on the circumference of the inclined surface 11, and only one of the pulling grooves 12 is arranged on the inclined surface 11. Preferably, the pulling groove 12 is a hemispherical groove, and the groove is connected to the inclined surface 11 by an arc surface, and the plurality of pulling grooves 12 are arranged at intervals.

[0042] In one embodiment of the present application, the pulling groove 12 is located at the bottom of the upper surface of the oblique needle 1, that is, there is a certain distance between the pulling groove 12 and the upper surface of the oblique needle 1 to prevent the pulling groove 12 from overlapping with the upper surface of the oblique needle 1, that is, it is partially located on the upper surface of the oblique needle 1, and the setting of the pulling groove 12 does not play a role in fixing the material handle 7.

[0043] As attached Figure 4As shown, the present application also provides a stacked mold docking structure, including the above-mentioned improved valve needle, and also includes a first mold core 2, a straight needle 4 and a second mold core 5, the first mold core 2 is a movable end, a first hot nozzle 3 is arranged on one side of the first mold core 2, the interior of the first mold core 2 is provided with a docking hole, the docking hole is a through hole, the docking hole of the first mold core 2 corresponds to the gate of the first hot nozzle 3, the interior of the first hot nozzle 3 is slidably provided with a straight needle 4, the straight needle 4 is matched with the docking hole, the first mold core 2 is provided with a second mold core 5 on the side away from the first hot nozzle 3, the second mold core 5 is a fixed end, and the second mold core 5 is away from the first mold core 2 on one side A second hot nozzle 6 is arranged on the side; during the working process, the first mold core 2 moves toward the second mold core 5 and is docked, the oblique needle 1 is slidably arranged inside the second hot nozzle 6, and a docking hole is also arranged inside the second mold core 5, the docking hole of the second mold core 5 cooperates with the gate of the second hot nozzle 6, and the docking hole of the second mold core 5 cooperates with the oblique needle 1, and the bottom of the docking hole of the second mold core 5 is arranged with an inclined surface 11, the inclined surface 11 of the oblique needle 1 cooperates with the inclined surface 11, and the two docking holes are symmetrically arranged to facilitate the docking of the straight needle 4 with the oblique needle 1 and to facilitate the docking of the gate of the first hot nozzle 3 with the gate of the second hot nozzle 6.

[0044] In the initial state, the straight needle 4 and the oblique needle 1 respectively close the gates of the first hot nozzle 3 and the second hot nozzle 6, and the first mold core 2 and the second mold core 5 are in a separated state. When the mold is closed, the first mold core 2 moves toward the second mold core 5 and cooperates with each other. At this time, the straight needle 4 of the first hot nozzle 3 extends into the docking hole of the second mold core 5 and docks with the oblique needle 1 of the second hot nozzle 6. The gate of the first hot nozzle 3 is connected with the gate of the second hot nozzle 6 under the action of the two docking holes. By sliding the straight needle 4 and the oblique needle 1, the two gates are opened and the injection molding work is performed;

[0045] When the injection molding work is completed, the two gates are closed by sliding the straight needle 4 and the oblique needle 1, and the inclined surface 11 of the oblique needle 1 cooperates with the inclined surface 11 and is located in the docking hole of the second mold core 5. The straight needle 4 in the first hot nozzle 3 protrudes from the gate of the first hot nozzle 3 and extends into the docking hole of the second mold core 5 for docking sealing. At this time, a gap will be generated between the straight needle 4 and the oblique needle 1, and there will be plastic residue, which will form a material handle 7 after cooling for a certain period of time. Then, through external equipment, the first mold core 2 is moved away from the second mold core 5, and the straight needle 4 also moves with the movement of the first mold core 2. At this time, the material handle 7 is connected to the oblique needle 1 under the action of the pulling groove 12, and will not move with the pulling groove 12, thereby preventing the material handle 7 from falling on the surface of the second mold core 5 and being stuck in the docking hole of the second mold core 5.

[0046] Furthermore, heaters are respectively provided on the outside of the first hot nozzle 3 and the second hot nozzle 6, and the heaters surround the first hot nozzle 3 and the second hot nozzle 6. The plastic in the hot nozzle flow channel is heated by the heater. After the mold is closed, the material handle 7 can be heated at the same time to melt it to prevent the hot runner from being blocked.

[0047] Furthermore, after the first mold core 2 and the second mold core 5 are docked, they are connected and fixed to the upper and lower mold plates respectively by screws, and under the mold clamping pressure of the injection molding machine, the first mold core 2 and the second mold core 5 are tightly docked.

[0048] 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. An improved valve needle, comprising an inclined needle, characterized in that: Also includes: An inclined plane is arranged at the top of the inclined needle so that the top of the inclined needle is arranged in a cone shape; The material pulling groove is arranged on the inclined surface of the inclined needle and is used for fixing the material handle.

2. The improved valve needle according to claim 1, characterized in that: The cross section of the pulling trough is fan-shaped, triangular or trapezoidal.

3. The improved valve needle according to claim 2, characterized in that: The material pulling trough is arranged around the inclined surface of the inclined needle.

4. The improved valve needle according to claim 1, characterized in that: The pulling groove is located at the bottom of the upper surface of the inclined needle.

5. The improved valve needle according to claim 1, characterized in that: The inner surface of the pulling trough is connected to the inclined surface through a curved surface.

6. A stacked mold docking structure, characterized in that: The improved valve needle according to any one of claims 1 to 5 further comprises: A first mold core; a first hot nozzle is disposed on one side of the first mold core; A straight needle, slidably disposed inside the first hot nozzle, for closing or opening the gate of the first hot nozzle; The second mold core is arranged on a side of the first mold core away from the first hot nozzle; a second hot nozzle is arranged on the side of the second mold core away from the first mold core, and the oblique needle is slidably arranged in the second hot nozzle to close or open the gate of the second hot nozzle; Symmetrical docking holes are respectively provided inside the first mold core and the second mold core. The two docking holes correspond to the gate of the first hot nozzle and the gate of the second hot nozzle respectively, and are used for docking the straight needle with the oblique needle.

7. The stacked mold docking structure according to claim 6, characterized in that: Heaters are disposed outside the first hot nozzle and the second hot nozzle.

8. The stacked mold docking structure according to claim 6, characterized in that: The first mold core and the second mold core are respectively connected and fixed to the upper and lower mold plates by screws.

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