Runner assembly and color mixing injection molding machine

Abstract

The utility model discloses a runner assembly and a color mixing injection molding machine, and relates to the technical field of injection molding, the runner assembly comprises a nozzle body, a first runner, a second runner and a main runner are arranged in the nozzle body, and the first runner and the second runner are communicated with the main runner through a color mixing runner; a steel ball piece is arranged in the color mixing flow channel and can move between a first position and a second position in the color mixing flow channel by means of the pushing force of injection molding liquid; when the steel ball piece moves to a first position, the steel ball piece blocks the communication between the first flow channel and the main flow channel; and when the steel ball piece moves to a second position, the steel ball piece blocks the communication between the second flow channel and the main flow channel. According to the technical scheme provided by the utility model, the sealing and non-return effects at the junctions of the runners can be improved, and mutual glue channeling among the thermoplastic materials is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a flow channel component and a color-mixing injection molding machine. Background Art

[0002] A color-mixing injection molding machine is a machine that injects two different colors of molten thermoplastic materials into the same set of molds, thereby producing injection molded products with mixed colors or gradient colors formed by the two colors. Among them, the runner assembly is one of the key components of the color-mixing injection molding machine. The two different colors of molten thermoplastic materials need to pass through the runner assembly before being injected from the plasticizing injection machine to the injection mold. The runner assembly is used to control the color mixing while keeping them in a molten state. In the related art, the sealing and anti-return effect at the intersection of each runner is poor, which makes it easy for the thermoplastic materials to mix with each other, making it difficult for the color mixing effect of the injection molded product to meet expectations.

[0003] It should be noted that the above contents are only used to assist in understanding the technical solution of the present utility model, and do not constitute an admission that the above contents are prior art. Utility Model Content

[0004] The main purpose of the utility model is to propose a flow channel assembly and a color mixing injection molding machine, aiming to improve the sealing and anti-return effect at the intersection of each flow channel, avoid mutual glue mixing between various thermoplastic materials, so that the color mixing effect of the injection molded product meets the expectations.

[0005] To achieve the above-mentioned purpose, the utility model proposes a flow channel component, which includes a nozzle body, the nozzle body includes a first end and a second end arranged opposite to each other in the axial direction, the first end of the nozzle body is used to connect the injection mold, and the second end of the nozzle body is respectively connected to a first plasticizing injection machine and a second plasticizing injection machine through a flow channel plate; a first flow channel, a second flow channel and a main flow channel are arranged inside the nozzle body, the first flow channel is used to connect the first plasticizing injection machine, the second flow channel is used to connect the second plasticizing injection machine, and the main flow channel is used to connect the injection mold; the first flow channel and the second flow channel are connected to the main flow channel through a color mixing flow channel; a steel ball piece is arranged inside the color mixing flow channel, and the steel ball piece can move between a first position and a second position inside the color mixing flow channel by relying on the driving force of the injection liquid; when the steel ball piece moves to the first position, the steel ball piece blocks the connection between the first flow channel and the main flow channel; when the steel ball piece moves to the second position, the steel ball piece blocks the connection between the second flow channel and the main flow channel.

[0006] In one embodiment, the color mixing channel is located on a side close to the first end of the nozzle body.

[0007] In one embodiment, the color mixing channel has an arc-shaped structure, the arc-shaped ends of the color mixing channel are respectively connected to the first channel and the second channel, and the arc-shaped middle part of the color mixing channel is connected to the main channel.

[0008] In one embodiment, the cross-sectional diameter of the color mixing channel is larger than the cross-sectional diameter of the first channel, and the cross-sectional diameter of the color mixing channel is larger than the cross-sectional diameter of the second channel, and the cross-sectional diameter of the color mixing channel is larger than the cross-sectional diameter of the total channel; the inner wall surface of the color mixing channel fits well with the outer surface of the steel ball part.

[0009] In one embodiment, a flange structure is provided at the second end of the nozzle body, and the nozzle body is fixed to the flow channel plate via the flange structure.

[0010] In one embodiment, the first flow channel and the second flow channel have the same structure and are symmetrically arranged; the first flow channel and the second flow channel each include a first sub-flow channel and a second sub-flow channel that are interconnected, and the first sub-flow channel is located on a side close to the color mixing channel; the first sub-flow channel and the second sub-flow channel are both linear structures, and a first angle is provided between the first sub-flow channel and the second sub-flow channel, and the value range of the first angle is 120°~180°.

[0011] In one embodiment, the nozzle body includes a first nozzle core, a second nozzle core and a third nozzle core which are coaxially arranged in sequence from the second end to the first end of the nozzle body; the first flow channel and the second sub-flow channel of the second flow channel are arranged inside the first nozzle core, the first flow channel and the first sub-flow channel of the second flow channel are arranged inside the second nozzle core, and the color mixing flow channel is arranged inside the third nozzle core; the first nozzle core and the second nozzle core are fixedly connected to each other by a first nozzle sleeve, and the second nozzle core and the third nozzle core are fixedly connected to each other by a second nozzle sleeve.

[0012] In one embodiment, the first nozzle sleeve comprises a first annular portion, a first connecting portion and a second annular portion connected in sequence along the direction from the first end to the second end of the nozzle body, a first threaded portion is provided on the outer side of the first annular portion, a second threaded portion is provided on the inner side of the second annular portion, a third threaded portion is provided on the outer side of the first nozzle core, and a step portion convexly arranged at one end of the second nozzle core close to the first nozzle core; the second threaded portion is threadedly connected with the third threaded portion, at which time the first connecting portion and the step portion are abutted against each other and a pressing force is applied to the step portion toward the direction of the first nozzle core, and the inner side surface of the first annular portion is abutted against the outer side surface of the second nozzle core;

[0013] In one embodiment, the second nozzle sleeve includes a nozzle end portion, a second connecting portion and a third annular portion which are sequentially connected along the direction from the first end to the second end of the nozzle body, and a fourth threaded portion is provided on the inner side of the third annular portion; the main flow channel is arranged inside the nozzle end portion; the fourth threaded portion is threadedly connected to the first threaded portion, and at this time, the second connecting portion and the third nozzle core are in contact with each other and apply a clamping force to the third nozzle core in the direction of the second nozzle core.

[0014] In one embodiment, a third flow channel and a fourth flow channel of a straight structure are provided inside the flow channel plate, two ends of the third flow channel are respectively connected to the first plasticizing injection machine and the first flow channel, and a second angle is provided between the third flow channel and the first flow channel; two ends of the fourth flow channel are respectively connected to the second plasticizing injection machine and the second flow channel, and a third angle is provided between the fourth flow channel and the second flow channel; the value range of the second angle and the third angle is 120°~180°.

[0015] To achieve the above object, the utility model provides a color-mixing injection molding machine, comprising any one of the flow channel components described above.

[0016] The technical solution of the utility model is to set a color mixing flow channel between the first flow channel, the second flow channel and the main flow channel, and the injection liquid injected from the first plasticizing injection machine passes through the first flow channel, the color mixing flow channel and the main flow channel in sequence to finally reach the injection mold, and the injection liquid injected from the second plasticizing injection machine passes through the second flow channel, the color mixing flow channel and the main flow channel in sequence to finally reach the injection mold, and by controlling the injection time of the first plasticizing injection machine and the second plasticizing injection machine, an injection molded product with a mixed color form or a gradient color form formed by two colors is achieved.

[0017] The color mixing channel is arranged at the junction of the first channel and the second channel, and a steel ball is movably arranged inside the color mixing channel, and the steel ball can move between the first position and the second position inside the color mixing channel by the driving force of the injection liquid; it can be understood that when the second plasticizing injection machine performs the injection operation, the injection liquid pushes the steel ball in the color mixing channel to move it to the first position to ensure that the second channel and the main channel can be smoothly connected. At this time, the steel ball blocks the connection between the first channel and the main channel, so that the injection liquid in the first channel It is impossible to mix with the injection liquid in the second flow channel; similarly, when the first plasticizing injection machine performs injection operation, its injection liquid pushes the steel ball part in the color mixing flow channel to move it to the second position to ensure smooth communication between the first flow channel and the main flow channel. At this time, the steel ball part blocks the communication between the second flow channel and the main flow channel, so that the injection liquid in the second flow channel cannot mix with the injection liquid in the first flow channel; in summary, the sealing and non-return effect at the intersection of each flow channel is improved to avoid mutual mixing between each thermoplastic material, so that the color mixing effect of the injection molded product meets expectations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a flow channel assembly provided by the utility model;

[0020] Figure 2 A schematic diagram of the exploded structure of an embodiment of a flow channel assembly provided by the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of an embodiment of a flow channel assembly provided by the utility model;

[0022] Figure 4 The second schematic diagram of the internal structure of the flow channel assembly according to the present invention;

[0023] Figure 5 This is a schematic structural diagram of a color mixing flow channel in an embodiment of a flow channel assembly provided by the utility model.

[0024] Description of reference numerals:

[0025] 1. Nozzle body; 2. Flow channel plate; 201. Third flow channel; 202. Fourth flow channel; 3. First flow channel; 301. First sub-flow channel; 302. Second sub-flow channel; 4. Second flow channel; 5. Total flow channel; 6. Mixed color flow channel; 601. Steel ball piece; 7. Flange structure; 8. First nozzle core; 9. Second nozzle core; 901. Step portion; 10. Third nozzle core; 11. First nozzle sleeve; 111. First annular portion; 112. First connecting portion; 113. Second annular portion; 12. Second nozzle sleeve; 121. Nozzle end; 122. Second connecting portion; 123. Third annular portion;

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, what is described is only a part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, it should be noted that the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] In the related art, the sealing and anti-return effect at the intersection of each flow channel is poor, which makes it easy for the thermoplastic materials to mix with each other, making it difficult for the color mixing effect of the injection molded product to meet expectations.

[0031] In order to solve the above technical problems, the utility model provides a flow channel component.

[0032] See also Figure 1-5In one embodiment of the utility model, the flow channel assembly includes a nozzle body 1, the nozzle body 1 includes a first end and a second end arranged opposite to each other in the axial direction, the first end of the nozzle body 1 is used to connect to the injection mold (not shown in the drawings), and the second end of the nozzle body 1 is connected to the first plasticizing injection machine (not shown in the drawings) and the second plasticizing injection machine (not shown in the drawings) through the flow channel plate 2; the nozzle body 1 is provided with a first flow channel 3, a second flow channel 4 and a total flow channel 5 inside, the first flow channel 3 is used to connect to the first plasticizing injection machine, and the second flow channel 4 is used to connect to the second plasticizing injection machine Injection machine, the main flow channel 5 is used to connect the injection mold; the first flow channel 3 and the second flow channel 4 are connected to the main flow channel 5 through the color mixing flow channel 6; a steel ball 601 is provided inside the color mixing flow channel 6, and the steel ball 601 can move between the first position and the second position inside the color mixing flow channel 6 by the driving force of the injection liquid; when the steel ball 601 moves to the first position, the steel ball 601 blocks the connection between the first flow channel 3 and the main flow channel 5; when the steel ball 601 moves to the second position, the steel ball 601 blocks the connection between the second flow channel 4 and the main flow channel 5. It can be understood that the above-mentioned injection liquid refers to a molten thermoplastic material. After the molten thermoplastic material is injected into the molding cavity of the injection mold, the thermoplastic material is cooled and molded to form an injection molded product.

[0033] The technical solution of the utility model is to set a color mixing flow channel 6 between the first flow channel 3, the second flow channel 4 and the main flow channel 5, so that the injection liquid injected from the first plasticizing injection machine passes through the first flow channel 3, the color mixing flow channel 6 and the main flow channel 5 in sequence and finally reaches the injection mold. Similarly, the injection liquid injected from the second plasticizing injection machine passes through the second flow channel 4, the color mixing flow channel 6 and the main flow channel 5 in sequence and finally reaches the injection mold. By controlling the injection time of the first plasticizing injection machine and the second plasticizing injection machine, an injection molded product with a mixed color form or a gradient color form formed by two colors can be produced.

[0034] The color mixing channel 6 is arranged at the junction of the first channel 3 and the second channel 4, and a steel ball 601 is movably arranged inside the color mixing channel 6. The steel ball 601 can move between the first position and the second position inside the color mixing channel 6 by relying on the driving force of the injection liquid. It can be understood that when the second plasticizing injection machine performs the injection operation, the injection liquid pushes the steel ball 601 in the color mixing channel 6 to move it to the first position to ensure that the second channel 4 and the main channel 5 can be smoothly connected. At this time, the steel ball 601 blocks the connection between the first channel 3 and the main channel 5, so that the first channel 3 The injection liquid in the second flow channel 4 cannot be mutually glued with the injection liquid in the second flow channel 4; similarly, when the first plasticizing injection machine performs the injection operation, the injection liquid in the color mixing flow channel 6 pushes the steel ball part 601 to move it to the second position, so as to ensure that the first flow channel 3 and the main flow channel 5 can be smoothly connected. At this time, the steel ball part 601 blocks the connection between the second flow channel 4 and the main flow channel 5, so that the injection liquid in the second flow channel 4 cannot be mutually glued with the injection liquid in the first flow channel 3; in summary, the sealing and non-return effect at the intersection of each flow channel is improved, and mutual glue between each thermoplastic material is avoided, so that the color mixing effect of the injection molded product meets the expectations.

[0035] Specifically, the color mixing channel 6 is located on one side close to the first end of the nozzle body 1. With such a configuration, the total length of the main channel 5 is reduced as much as possible, thereby reducing the probability of residual injection liquid on the main channel 5, further ensuring the probability of mutual glue mixing between the injection liquids, making it difficult for the color mixing effect of the injection molded product to meet expectations.

[0036] Specifically, the second end of the nozzle body 1 is provided with a flange structure 7, and the nozzle body 1 is fixed to the flow channel plate 2 by the flange structure 7. In this way, the flange structure 7 adopts the principle of surface sealing, and has a strong connection tightness, which can ensure the safe and reliable operation of the injection liquid delivery system, and can still operate stably even under high temperature or high pressure working conditions, and is easy to disassemble and replace. The nozzle body 1 and the flow channel plate 2 are fixedly connected to each other by the flange structure 7, and the structure is simple and practical.

[0037] There are many specific structures of the color mixing channel 6. In one embodiment, the color mixing channel 6 is an arc-shaped structure, and the arc-shaped ends of the color mixing channel 6 are respectively connected to the first channel 3 and the second channel 4, and the arc-shaped middle part of the color mixing channel 6 is connected to the main channel 5. This arrangement allows the steel ball 601 to move along the arc surface of the color mixing channel 6, which is conducive to enhancing the smoothness of the steel ball 601 when moving.

[0038] Furthermore, the cross-sectional diameter of the color-mixing flow channel 6 is larger than that of the first flow channel 3, and the cross-sectional diameter of the color-mixing flow channel 6 is larger than that of the second flow channel 4, and the cross-sectional diameter of the color-mixing flow channel 6 is larger than that of the total flow channel 5; the inner wall surface of the color-mixing flow channel 6 fits with the outer surface of the steel ball 601. This arrangement ensures that the steel ball 601 can only move in the color-mixing flow channel 6, so as to prevent the steel ball 601 from moving to the inside of the first flow channel 3, the second flow channel 4 and the total flow channel 5, whose cross-sectional diameters are relatively small.

[0039] As a preferred solution of the above embodiment, refer to the attached Figure 3 , the first flow channel 3 and the second flow channel 4 have the same structure and are symmetrically arranged; since the first flow channel 3 and the second flow channel 4 have the same structure, the first flow channel 3 is used as an example for description in this embodiment, and the first flow channel 3 includes a first sub-flow channel 301 and a second sub-flow channel 302 which are interconnected, and the first sub-flow channel 301 is located on the side close to the color mixing flow channel 6; the first sub-flow channel 301 and the second sub-flow channel 302 are both in a straight line structure, and a first angle is arranged between the first sub-flow channel 301 and the second sub-flow channel 302, and the value range of the first angle is 120°~180°. Such an arrangement is different from the prior art in which one of the flow channels adopts the outer circumferential glue running method of the nozzle core. In this embodiment, since the first flow channel 3 and the second flow channel 4 are symmetrically arranged inside the nozzle body 1, that is, the outer circumferential glue running method of the nozzle core is not adopted, the defect of uneven circumferential glue running is avoided, and the defect of residual glue at the outer tail of the nozzle body 1 is avoided, which leads to the defect of black spots in long-term production, especially transparent injection molding products. The first flow channel 3 and the second flow channel 4 are composed of a segmented structure of a first sub-flow channel 301 and a second sub-flow channel 302, so as to avoid problems such as difficulty in installation and residual glue caused by a single flow channel being too long. At the same time, the segmented structure can also be easily disassembled and assembled, and the glue is convenient to clean. At the same time, the angle value range of the first angle between the first sub-flow channel 301 and the second sub-flow channel 302 is specified to avoid excessive pressure of the injection liquid at the corner where the first sub-flow channel 301 and the second sub-flow channel 302 meet, thereby reducing the pressure loss of the injection liquid during the injection process, so that it can maintain sufficient injection pressure to perform injection molding on the injection mold.

[0040] Further, see Attachment Figure 3-4The nozzle body 1 includes a first nozzle core 8, a second nozzle core 9 and a third nozzle core 10 which are coaxially arranged in sequence from the second end to the first end of the nozzle body 1; the second sub-flow channel 302 of the first flow channel 3 and the second flow channel 4 is arranged inside the first nozzle core 8, the first sub-flow channel 301 of the first flow channel 3 and the second flow channel 4 is arranged inside the second nozzle core 9, and the color mixing flow channel 6 is arranged inside the third nozzle core 10; the first nozzle core 8 and the second nozzle core 9 are fixedly connected to each other through the first nozzle sleeve 11, and the second nozzle core 9 and the third nozzle core 10 are fixedly connected to each other through the second nozzle sleeve 12. In this arrangement, considering that customers often purchase nozzle cores of various structures to achieve different injection molding product process effects, it is necessary to frequently replace the nozzle core; in this embodiment, the first sub-flow channel 301, the second sub-flow channel 302 and the color mixing flow channel 6 are respectively arranged inside the first nozzle core 8, the second nozzle core 9 and the third nozzle core 10, so that they can be easily disassembled and assembled, and it is also convenient for cleaning glue.

[0041] Among them, there are many specific structures of the first nozzle sleeve 11. In one embodiment, refer to the attached Figure 4 The first nozzle sleeve 11 includes a first annular portion 111, a first connecting portion 112 and a second annular portion 113 which are sequentially connected along the direction from the first end to the second end of the nozzle body 1. A first threaded portion (not shown in the drawings) is provided on the outer side of the first annular portion 111, a second threaded portion (not shown in the drawings) is provided on the inner side of the second annular portion 113, a third threaded portion (not shown in the drawings) is provided on the outer side of the first nozzle core 8, and a step portion 901 which is convexly arranged is provided at one end of the second nozzle core 9 close to the first nozzle core 8; the second threaded portion is threadedly connected to the third threaded portion, and at this time, the first connecting portion 112 is connected to the nozzle core 8. The step portions 901 are fitted together and a pressing force is applied to the step portions 901 in the direction of the first nozzle core 8, and the inner side surface of the first annular portion 111 is fitted and connected with the outer side surface of the second nozzle core 9; in this way, during the process of the second threaded portion of the second annular portion 113 and the third threaded portion of the first nozzle core 8 being threadedly fixed to each other, the first connecting portion 112 and the step portion 901 of the second nozzle core 9 are fitted together and a pressing force is applied to the step portion 901 in the direction of the first nozzle core 8, thereby ensuring that the second nozzle core 9 and the first nozzle core 8 can be firmly connected, and the structure is simple and practical. In addition, the inner side surface of the first annular portion 111 is fitted and connected with the outer side surface of the second nozzle core 9, so that the second nozzle core 9 will not be radially displaced relative to the first annular portion 111, so that the first nozzle core 8 and the second nozzle core 9 can be effectively aligned.

[0042] Among them, there are many specific structures of the second nozzle sleeve 12. In one embodiment, refer to the attached Figure 4The second nozzle sleeve 12 includes a nozzle end 121, a second connection portion 122 and a third annular portion 123 which are sequentially connected along the direction from the first end to the second end of the nozzle body 1. A fourth threaded portion (not shown in the drawings) is provided inside the third annular portion 123. The main flow channel 5 is arranged inside the nozzle end 121. The fourth threaded portion is threadedly connected to the first threaded portion. At this time, the second connection portion 122 and the third nozzle core 10 are mutually attached and a pressing force is applied to the third nozzle core 10 in the direction of the second nozzle core 9. In this way, in the process of mutual threaded fixing of the third threaded portion of the third annular portion 123 and the first threaded portion of the first annular portion 111, the second connection portion 122 and the third nozzle core 10 are mutually attached and a pressing force is applied to the third nozzle core 10 in the direction of the second nozzle core 9, thereby ensuring that the third nozzle core 10 and the second nozzle core 9 can be firmly connected. The structure is simple and practical. At the same time, the first nozzle sleeve 11 and the second nozzle sleeve 12 are threadedly connected to the first threaded portion so as to form an integral structure, thereby improving the integrity of the nozzle body 1.

[0043] As a preferred solution of the above embodiment, refer to the attached Figure 3 The interior of the flow channel plate 2 is provided with a third flow channel 201 and a fourth flow channel 202 of a linear structure, the two ends of the third flow channel 201 are respectively connected to the first plasticizing injection machine and the first flow channel 3, and a second angle is set between the third flow channel 201 and the first flow channel 3; the two ends of the fourth flow channel 202 are respectively connected to the second plasticizing injection machine and the second flow channel 4, and a third angle is set between the fourth flow channel 202 and the second flow channel 4; the value range of the second angle and the third angle is 120°~180°. In this way, the angle value range of the second angle between the third flow channel 201 and the first flow channel 3 is specified to avoid excessive pressure of the injection liquid at the corner where the third flow channel 201 and the first flow channel 3 meet, thereby reducing the pressure loss during the injection of the injection liquid and maintaining sufficient injection pressure for the injection mold; similarly, the angle value range of the third angle between the fourth flow channel 202 and the second flow channel 4 is specified to avoid excessive pressure of the injection liquid at the corner where the fourth flow channel 202 and the second flow channel 4 meet, thereby reducing the pressure loss during the injection of the injection liquid and maintaining sufficient injection pressure for the injection mold.

[0044] Furthermore, a universal interface design is adopted at the junction of the manifold plate 2 and the first plasticizing injection machine and the second plasticizing injection machine, so that the manifold plate 2 can be adapted to various models of the first plasticizing injection machine and the second plasticizing injection machine, thereby improving the installation flexibility of the manifold plate 2 and the first plasticizing injection machine and the second plasticizing injection machine.

[0045] This embodiment also discloses a color-mixing injection molding machine, including a flow channel assembly of any of the above embodiments. The specific structure of the flow channel assembly can be referred to the above embodiments. Since the color-mixing injection molding machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0046] It should be noted that the runner assembly and other contents of the color-mixing injection molding machine disclosed in the present invention are prior art and will not be described in detail here.

[0047] The above are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any direct / indirect application of the present invention in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A flow channel assembly, characterized in that: The flow channel assembly includes a nozzle body, and the nozzle body includes a first end and a second end that are axially opposite to each other. The first end of the nozzle body is used to connect to the injection mold, and the second end of the nozzle body is respectively connected to the first plasticizing injection machine and the second plasticizing injection machine through a flow channel plate; a first flow channel, a second flow channel and a main flow channel are arranged inside the nozzle body, the first flow channel is used to connect to the first plasticizing injection machine, the second flow channel is used to connect to the second plasticizing injection machine, and the main flow channel is used to connect to the injection mold; the first flow channel and the second flow channel are interconnected with the main flow channel through a color mixing flow channel; a steel ball is arranged inside the color mixing flow channel, and the steel ball can move between a first position and a second position inside the color mixing flow channel by relying on the driving force of the injection liquid; When the steel ball moves to the first position, the steel ball blocks the communication between the first flow channel and the main flow channel; When the steel ball piece moves to the second position, the steel ball piece blocks the communication between the second flow channel and the main flow channel.

2. The flow channel assembly according to claim 1, characterized in that: The color mixing channel is located at one side close to the first end of the nozzle body.

3. The flow channel assembly according to claim 1, characterized in that: The color mixing channel has an arc-shaped structure, the arc-shaped ends of the color mixing channel are respectively connected to the first channel and the second channel, and the arc-shaped middle part of the color mixing channel is connected to the main channel.

4. The flow channel assembly according to claim 3, characterized in that: The cross-sectional diameter of the color mixing channel is larger than the cross-sectional diameter of the first channel, and the cross-sectional diameter of the color mixing channel is larger than the cross-sectional diameter of the second channel, and the cross-sectional diameter of the color mixing channel is larger than the cross-sectional diameter of the total channel; the inner wall surface of the color mixing channel fits well with the outer surface of the steel ball part.

5. The flow channel assembly according to claim 1, characterized in that: A flange structure is provided at the second end of the nozzle body, and the nozzle body is fixed to the flow channel plate via the flange structure.

6. The flow channel assembly according to claim 1, characterized in that: The first flow channel and the second flow channel are symmetrically arranged; the first flow channel and the second flow channel each include a first sub-flow channel and a second sub-flow channel that are interconnected, and the first sub-flow channel is located on a side close to the color mixing channel; the first sub-flow channel and the second sub-flow channel are both in a straight line structure, and a first angle is provided between the first sub-flow channel and the second sub-flow channel, and the value range of the first angle is 120°~180°.

7. The flow channel assembly according to claim 6, characterized in that: The nozzle body comprises a first nozzle core, a second nozzle core and a third nozzle core which are coaxially arranged in sequence from the second end to the first end of the nozzle body; the first flow channel and the second sub-flow channel of the second flow channel are arranged inside the first nozzle core, the first flow channel and the first sub-flow channel of the second flow channel are arranged inside the second nozzle core, and the color mixing flow channel is arranged inside the third nozzle core; The first nozzle core and the second nozzle core are fixedly connected to each other via a first nozzle sleeve, and the second nozzle core and the third nozzle core are fixedly connected to each other via a second nozzle sleeve.

8. The flow channel assembly according to claim 7, characterized in that: The first nozzle sleeve comprises a first annular portion, a first connecting portion and a second annular portion which are sequentially connected along the direction from the first end to the second end of the nozzle body, a first threaded portion is provided on the outer side of the first annular portion, a second threaded portion is provided on the inner side of the second annular portion, a third threaded portion is provided on the outer side of the first nozzle core, and a step portion which is convexly arranged at one end of the second nozzle core close to the first nozzle core; the second threaded portion is threadedly connected with the third threaded portion, at which time the first connecting portion and the step portion are abutted against each other and a pressing force is applied to the step portion in the direction of the first nozzle core, and the inner side surface of the first annular portion is abutted against the outer side surface of the second nozzle core; The second nozzle sleeve includes a nozzle end portion, a second connecting portion and a third annular portion which are sequentially connected along the direction from the first end to the second end of the nozzle body, and a fourth threaded portion is provided on the inner side of the third annular portion; the main flow channel is arranged inside the nozzle end portion; the fourth threaded portion is threadedly connected to the first threaded portion, and at this time, the second connecting portion and the third nozzle core are in contact with each other and apply a pressing force to the third nozzle core in the direction of the second nozzle core.

9. The flow channel assembly according to claim 1, characterized in that: The runner plate is provided with a third runner and a fourth runner of a straight structure inside, the two ends of the third runner are respectively connected to the first plasticizing injection machine and the first runner, and a second angle is provided between the third runner and the first runner; the two ends of the fourth runner are respectively connected to the second plasticizing injection machine and the second runner, and a third angle is provided between the fourth runner and the second runner; the value range of the second angle and the third angle is 120°~180°.

10. A color mixing injection molding machine, characterized in that: Comprising the flow channel assembly according to any one of claims 1 to 9.

Images