Injection molding assembly

Abstract

The utility model discloses an injection molding assembly which comprises a mold, a first runner and a second runner which are communicated with each other are arranged in the mold, an included angle is formed between the first runner and the second runner, and the second runner extends to one side of the mold; the nozzle seat is connected to one side of the mold, the interior of the nozzle seat is communicated with the second runner, an injection molding opening is formed in the side, away from the mold, of the nozzle seat, the injection molding opening is communicated with the interior of the nozzle seat, and a mixing runner spirally extending in the direction close to the injection molding opening is arranged in the nozzle seat; the valve needle penetrates into the second runner and the nozzle seat from the other side of the mold and extends to the injection molding port, the spiral mixing runner is arranged in the nozzle seat to guide and rotate molten plastic, so that the molten plastic rotates around the valve needle to be mixed so as to eliminate the temperature difference, the uniformity of the temperature during discharging is improved, and the service life of the mold is prolonged. Therefore, the injection molding production quality is improved.

Description

Technical Field

[0001] The utility model relates to plastic processing equipment, in particular to an injection molding component. Background Art

[0002] In an injection mold, an injection nozzle for injection molding is provided on the mold, and a main channel for conveying molten plastic and a branch channel connected to the main channel are provided inside the mold. The branch channel is connected to the injection nozzle. When the molten plastic needs to be conveyed to the injection nozzle on the mold, the molten plastic flows from the main channel into the branch channel. During this process, the molten plastic will be blocked by the valve needle passing through the branch channel, causing the molten plastic in the branch channel to produce a temperature difference at the valve needle. At this time, the temperature of the molten plastic close to the main channel is higher, while the temperature of the molten plastic away from the main channel is lower. This results in uneven temperature distribution of the molten plastic during injection molding, affecting product production quality. Therefore, there is an urgent need for an injection molding component with a more uniform discharge temperature during injection molding. Utility Model Content

[0003] The purpose of the utility model is to provide an injection molding component to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The solution of the utility model to solve its technical problems is:

[0005] An injection molding component includes: a mold, in which a first flow channel and a second flow channel are provided that are interconnected, an angle is formed between the first flow channel and the second flow channel, and the second flow channel extends to one side of the mold; a nozzle seat, connected to one side of the mold, the interior of the nozzle seat is interconnected with the second flow channel, an injection port is provided on a side of the nozzle seat away from the mold, the injection port and the interior of the nozzle seat are interconnected, and the nozzle seat has a mixing flow channel that spirally extends in a direction close to the injection port; a valve needle penetrates the second flow channel and the nozzle seat from the other side of the mold and extends to the injection port.

[0006] This technical solution has at least the following beneficial effects: the first flow channel and the second flow channel in the mold are both used to transport molten plastic. When in use, the molten plastic is input into the first flow channel of the mold, and when it reaches the injection molding station, it is deflected to the second flow channel and transported from the second flow channel to the nozzle seat. At this time, the molten plastic passes through the obstruction of the valve needle, and a temperature difference appears in the second flow channel at the position where the valve needle is close to the first flow channel. When the molten plastic enters the nozzle seat along the second flow channel, it passes through the spirally extending mixing flow channel in the nozzle seat. The mixing flow channel can be used to spirally mix the molten plastic, thereby improving the temperature uniformity of the molten plastic when it is discharged from the injection port. In this way, the spiral mixing flow channel is set in the nozzle seat to guide the rotation of the molten plastic, so that the molten plastic rotates around the valve needle and mixes to eliminate the temperature difference, thereby improving the temperature uniformity during discharge, thereby improving the quality of injection molding production.

[0007] As a further improvement to the above technical solution, the nozzle holder includes a holder and a nozzle. The holder is connected to one side of the mold. An injection molding flow channel interconnected with the second flow channel is provided in the holder. One end of the nozzle is connected to the end of the holder away from the mold. The other end of the nozzle is provided with the injection port. A mixing flow channel interconnected with the injection molding flow channel is provided in the nozzle. The holder is fixedly connected to the nozzle holder, while the nozzle is used to output molten plastic. When the nozzle holder is produced, the injection molding flow channel is directly formed after the nozzle and then installed on the holder, making production more convenient. During injection molding, the molten plastic is output from the second flow channel to the injection molding flow channel, and then flows from the injection molding flow channel into the spirally extending mixing flow channel. After being rotated and mixed in the mixing flow channel, it is output from the injection port.

[0008] As a further improvement to the above technical solution, a mounting groove is provided at one end of the base body away from the mold. The inner diameter of the mounting groove is larger than the inner diameter of the injection molding runner at the end closest to the mounting groove, and the nozzle is connected to the mounting groove. Because the inner diameter of the mounting groove is larger than the inner diameter of the injection molding runner, the mounting groove forms a stepped structure at the location where it connects to the injection molding runner, which limits the installation depth of the nozzle. In this way, when the nozzle and base body are assembled, the nozzle can be quickly installed in the base body and the end of the nozzle can be installed into the base body, thereby improving the sealing of the connection between the two and reducing the leakage of molten plastic.

[0009] As a further improvement to the above technical solution, the nozzle is detachably connected to the mounting slot. After long-term use, the nozzle can be removed from the mounting slot for maintenance or replacement, which improves convenience and allows the nozzle or nozzle holder to be replaced separately, reducing subsequent maintenance costs.

[0010] As a further improvement to the above technical solution, the injection runner includes an entry section, a variable diameter section, and a narrowing section, sequentially connected in a direction away from the mold. The inner diameter of the variable diameter section gradually decreases as it moves away from the mold. When molten plastic enters the injection runner, it flows from the entry section into the variable diameter section. As the space within the variable diameter section gradually narrows toward the injection port, the molten plastic is gradually pressurized as it passes through the variable diameter section. It then enters the narrowing section, where the inner diameter has narrowed, and flows into the mixing runner.

[0011] As a further improvement to the above technical solution, a mixing head is sheathed outside the valve pin, located within the inlet section. A mixing groove is spirally disposed on the outside of the mixing head along the length of the valve pin. When molten plastic is fed into the inlet section, it rotates around the mixing head, guided by the mixing groove outside the mixing head. This allows for preliminary rotational mixing of the molten plastic within the injection runner, thereby improving temperature uniformity during discharge.

[0012] As a further improvement to the above technical solution, the mixing head extends into the reducing section. When the molten plastic flows into the reducing section, it can continue to rotate along the guidance of the mixing groove outside the mixing head. At this time, the molten plastic is spirally pressurized in the reducing section, further improving the uniformity of the molten plastic temperature in the injection flow channel.

[0013] As a further improvement to the above technical solution, the outer wall of the mixing head abuts against the inner wall of the reducing section and the inner wall of the narrowing section. In this case, a spiral flow channel is formed on the outer side of the mixing head between the mixing groove and the reducing section and narrowing section. The molten plastic entering the injection molding channel is spirally mixed along the spiral flow channel. This further ensures that the molten plastic is rotated and heated evenly in the injection molding channel, and increases the pressure of the molten plastic after passing through the injection molding channel.

[0014] As a further improvement to the above technical solution, an insert is connected to the side of the mold away from the nozzle holder, and the valve needle is fixed to the insert. When installing the valve needle, the valve needle can be first fixed to the insert, and then the insert is installed in the mold. The insert stabilizes the valve needle, improving the convenience of valve needle installation.

[0015] As a further improvement to the above technical solution, the insert is detachably connected to the mold. After long-term use, the insert can be removed to maintain or replace the valve needle, thereby improving ease of use and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of them. Those skilled in the art can also derive other design solutions and drawings based on these drawings without inventive effort.

[0017] Figure 1 It is an overall three-dimensional diagram of the utility model.

[0018] Figure 2 It is an overall front view of the utility model.

[0019] Figure 3 yes Figure 2 AA cross-sectional structure diagram.

[0020] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part B.

[0021] In the accompanying drawings: 100-mold, 110-first flow channel, 120-second flow channel, 200-valve needle, 310-seat body, 311-entry section, 312-diameter reducing section, 313-narrowing section, 320-nozzle, 321-mixing flow channel, 400-mixing head, 410-mixing tank, 500-insert. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Reference Figures 1 to 3 An injection molding component includes a mold 100, a nozzle seat and a valve needle 200, wherein the mold 100 is provided with a first flow channel 110 and a second flow channel 120 that are interconnected, an angle is formed between the first flow channel 110 and the second flow channel 120, and the second flow channel 120 extends to one side of the mold 100. In practical applications, a nozzle seat and a valve needle 200 can be combined to form an injection molding module. A plurality of injection molding modules are provided on the mold 100, and second flow channels 120 are respectively provided at positions corresponding to the plurality of injection molding modules in the mold 100. The plurality of second flow channels 120 are used to transport molten plastic to the plurality of injection molding modules respectively; a nozzle The seat is connected to one side of the mold 100, the interior of the nozzle seat is communicated with the second flow channel 120, and an injection port is provided on the side of the nozzle seat away from the mold 100. The injection port is communicated with the interior of the nozzle seat, and the nozzle seat has a mixing flow channel 321 that extends spirally in the direction close to the injection port; the valve needle 200 penetrates the second flow channel 120 and the nozzle seat from the other side of the mold 100, and one end of the valve needle 200 penetrates the nozzle seat and extends to the injection port. In actual application, a discharge gap is formed between the outer side of the valve needle 200 and the injection port, that is, the molten plastic is output from the discharge gap between the valve needle 200 and the injection port.

[0027] As can be seen from the above, the first flow channel 110 and the second flow channel 120 in the mold 100 are both used to transport molten plastic. When in use, the molten plastic is input into the first flow channel 110 of the mold 100, and when it reaches the injection molding station, it is deflected to the second flow channel 120, and is transported from the second flow channel 120 to the nozzle seat. At this time, the molten plastic passes through the obstruction of the valve needle 200, and the molten plastic has a temperature difference in the second flow channel 120 at the position where the valve needle 200 is close to the first flow channel 110. When the molten plastic enters the nozzle seat along the second flow channel 120, it passes through the spirally extending mixing flow channel 321 in the nozzle seat. The mixing flow channel 321 can be used to spirally mix the molten plastic, thereby improving the temperature uniformity of the molten plastic when it is discharged from the injection port. In this way, the spiral mixing flow channel 321 is set in the nozzle seat to guide the rotation of the molten plastic, so that the molten plastic rotates around the valve needle 200 to mix to eliminate the temperature difference, thereby improving the temperature uniformity during discharge, and thus improving the quality of injection molding production.

[0028] The nozzle holder can be an integrated structural part, and in order to facilitate the formation of a spiral injection channel inside the nozzle holder, the nozzle holder can be designed as a split structure. Specifically, the nozzle holder includes a seat body 310 and a nozzle 320. The seat body 310 is connected to one side of the mold 100. An injection channel that is interconnected with the second channel 120 is provided in the seat body 310. One end of the nozzle 320 is connected to the end of the seat body 310 away from the mold 100, and the other end of the nozzle 320 is provided with the injection port. The nozzle 320 is provided with a mixing channel 321 that is interconnected with the injection channel. The seat body 310 is used to be fixedly connected to the nozzle seat, and the nozzle head 320 is used to output the molten plastic. When the nozzle seat is produced, the injection runner is directly formed on the nozzle head 320, and then installed on the seat body 310, which makes production more convenient. During injection molding production, the molten plastic is output from the second runner 120 to the injection runner, and then flows from the injection runner into the spirally extended mixing runner 321. After rotating and mixing in the mixing runner 321, it is output from the injection port.

[0029] The nozzle 320 can be directly connected to the end of the base 310, or connected to the inside of the base 310. To facilitate the assembly and connection of the nozzle 320 and the base 310, in this embodiment, the base 310 is provided with a mounting groove at the end away from the mold 100. The inner diameter of the mounting groove is larger than the inner diameter of the injection molding runner at the end near the mounting groove, and the nozzle 320 is connected to the mounting groove. Because the inner diameter of the mounting groove is larger than the inner diameter of the injection molding runner, the mounting groove forms a stepped structure at the position where it connects to the injection molding runner, which can limit the installation depth of the nozzle 320. In this way, when the nozzle 320 and the base 310 are assembled, the nozzle 320 can be quickly installed in the base 310 and the end of the nozzle 320 can be installed into the base 310, thereby improving the sealing of the connection between the two and reducing the leakage of molten plastic.

[0030] After the nozzle 320 and the base 310 are assembled, they can be inseparable. However, to facilitate subsequent use and maintenance, in this embodiment, the nozzle 320 and the mounting slot are detachably connected. For example, the nozzle 320 can be connected to the mounting slot by snapping, or an external thread is provided on the outside of the nozzle 320, and an internal thread is provided on the inside of the mounting slot. The external and internal threads cooperate to install the nozzle 320 in the mounting slot. After long-term use, the nozzle 320 can be removed from the mounting slot for maintenance or replacement, which improves ease of use. The nozzle 320 or the nozzle base can also be replaced separately, reducing subsequent maintenance costs.

[0031] The injection runner can be a straight channel extending within the base 310. To increase the pressure of the molten plastic during discharge, in this embodiment, the injection runner includes an entry section 311, a reducing section 312, and a narrowing section 313, which are sequentially connected in a direction away from the mold 100. The inner diameter of the reducing section 312 gradually decreases as it moves away from the mold 100. When the molten plastic enters the injection runner, it flows from the entry section 311 into the reducing section 312. As the space within the reducing section 312 gradually narrows toward the injection port, the molten plastic is gradually pressurized as it passes through the reducing section 312. The molten plastic then enters the narrowing section 313, whose inner diameter has been narrowed, and flows into the mixing runner 321.

[0032] In order to further improve the mixing and temperature uniformity effect of the molten plastic, in this embodiment, as Figure 4 As shown, a mixing head 400 is sleeved on the outside of the valve needle 200. The mixing head 400 is located in the inlet section 311. A mixing groove 410 is spirally provided on the outside of the mixing head 400 along the length of the valve needle 200. When molten plastic is input into the inlet section 311, it rotates around the mixing head 400 under the guidance of the mixing groove 410 on the outside of the mixing head 400. This allows for preliminary rotational mixing of the molten plastic in the injection flow channel, thereby improving temperature uniformity during discharge.

[0033] In the above embodiment, the mixing head can be located only within the entry section 311. In this case, when the molten plastic enters the reducing section 312, the lack of the spiral guidance of the mixing groove 410 greatly reduces the rotational power. To further improve the effect of the rotational temperature uniformity of the molten plastic in the injection runner, in this embodiment, the mixing head 400 extends into the reducing section 312. When the molten plastic flows into the reducing section 312, it can continue to rotate along the guidance of the mixing groove 410 outside the mixing head 400. At this time, the molten plastic is spirally pressurized within the reducing section 312, further improving the temperature uniformity of the molten plastic in the injection runner.

[0034] In the above embodiment, a certain gap can be maintained between the outer wall of the mixing head 400 and the inner wall of the reducing section 312 and the inner wall of the receiving section. In this case, the molten plastic flowing between the mixing head 400 and the inner wall of the injection runner will partially spiral under the guidance of the mixing trough 410, while the remaining portion will directly enter the narrowing section 313. To further enhance the effect of rotational temperature equalization on the molten plastic at this location, in this embodiment, the outer wall of the mixing head 400 abuts against the inner wall of the reducing section 312 and the inner wall of the narrowing section 313. In this way, a spiral flow channel is formed on the outer side of the mixing head 400 between the mixing trough 410 and the reducing section 312 and the narrowing section 313, making it difficult for the molten plastic to pass between the outer side of the mixing head 400 and the inner wall of the injection runner. The molten plastic entering the injection runner is then spirally mixed along the spiral flow channel, further ensuring the effect of rotational temperature equalization of the molten plastic in the injection runner and increasing the pressure of the molten plastic after passing through the injection runner.

[0035] To enhance the stability of the valve needle 200 during installation in the mold 100, in this embodiment, an insert 500 is connected to the side of the mold 100 away from the nozzle holder, and the valve needle 200 is secured to the insert 500. When installing the valve needle 200, the valve needle 200 can be first secured to the insert 500 and then installed in the mold 100. The insert 500 stabilizes the valve needle 200, enhancing ease of installation. In practice, the first flow channel 110 and the second flow channel 120 are disconnected within the mold 100. However, a transfer channel is provided within the insert 500 to connect the first and second flow channels 110, 120. After the insert 500 is installed in the mold 100, one end of the transfer channel aligns with the first flow channel 110, while the other end aligns with the second flow channel 120. The first and second flow channels 110, 120 are now connected via the transfer channel.

[0036] To facilitate maintenance and replacement of the valve needle 200, in this embodiment, the insert 500 is detachably connected to the mold 100. For example, the insert 500 is fixed to the mold 100 by snapping, or screws or bolts are driven into the insert 500 to secure the insert 500 to the mold 100. After extended use, the insert 500 can be removed to maintain or replace the valve needle 200, improving ease of use and reducing maintenance costs.

[0037] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An injection molding component, characterized in that: include: A mold (100) is provided with a first flow channel (110) and a second flow channel (120) that are interconnected, an angle is formed between the first flow channel (110) and the second flow channel (120), and the second flow channel (120) extends to one side of the mold (100); a nozzle seat connected to one side of the mold (100), the interior of the nozzle seat being in communication with the second flow channel (120), an injection port being provided on a side of the nozzle seat away from the mold (100), the injection port being in communication with the interior of the nozzle seat, and a mixing flow channel (321) being provided in the nozzle seat and extending spirally in a direction close to the injection port; The valve needle (200) penetrates the second flow channel (120) and the nozzle seat from the other side of the mold (100) and extends to the injection port.

2. The injection molding component according to claim 1, characterized in that: The nozzle seat comprises a seat body (310) and a nozzle (320), wherein the seat body (310) is connected to one side of the mold (100), an injection flow channel interconnected with the second flow channel (120) is provided in the seat body (310), one end of the nozzle (320) is connected to an end of the seat body (310) away from the mold (100), the other end of the nozzle (320) is provided with the injection port, and a mixing flow channel (321) interconnected with the injection flow channel is provided in the nozzle (320).

3. The injection molding component according to claim 2, characterized in that: An installation groove is provided at one end of the seat body (310) away from the mold (100), the inner diameter of the installation groove is larger than the inner diameter of the injection flow channel at one end close to the installation groove, and the nozzle (320) is connected to the installation groove.

4. The injection molding component according to claim 3, characterized in that: The nozzle (320) is detachably connected to the mounting groove.

5. The injection molding component according to claim 2, characterized in that: The injection molding runner comprises an entry section (311), a diameter-reducing section (312), and a narrowing section (313) sequentially connected in a direction away from the mold (100); the inner diameter of the diameter-reducing section (312) gradually decreases in a direction away from the mold (100).

6. The injection molding component according to claim 5, characterized in that: A mixing head (400) is sleeved on the outside of the valve needle (200), and the mixing head (400) is located in the entry section (311). A mixing groove (410) is spirally arranged on the outside of the mixing head (400) along the length direction of the valve needle (200).

7. The injection molding component according to claim 6, characterized in that: The mixing head (400) extends into the diameter-reducing section (312).

8. The injection molding component according to claim 7, characterized in that: The outer side wall of the mixing head (400) respectively abuts against the inner wall of the diameter-reducing section (312) and the inner wall of the narrowing section (313).

9. The injection molding component according to claim 1, characterized in that: An insert (500) is connected to a side of the mold (100) away from the nozzle seat, and the valve needle (200) is fixed on the insert (500).

10. The injection molding component according to claim 9, characterized in that: The insert (500) and the mold (100) are detachably connected.

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