Hot runner assembly

Abstract

The hot runner assembly comprises a splitter plate and a steering part arranged in the splitter plate, the splitter plate is provided with a first runner, a second runner and a connecting groove, the first runner and the second runner intersect with each other, the connecting groove communicates with the first runner and the second runner, and a first communicating hole and a second communicating hole are formed in the connecting position of the first runner and the connecting groove and the connecting position of the second runner and the connecting groove correspondingly; an opening is formed in one side, facing the splitter plate, of the connecting groove; the steering part is arranged in the connecting groove and seals an opening of the connecting groove, the steering part and the first communicating hole are arranged at an interval, the steering part at least partially shields the first communicating hole in the axial direction of the first flow channel, and the steering part is provided with an overturning cavity communicating with the second flow channel; the end, away from the second runner, of the overturning cavity communicates with the connecting groove. According to the hot runner assembly provided by the invention, the steering part is arranged at the intersection of the two runners, so that the fluid is turned over for multiple times under the action of the steering part, the heat is rearranged when the fluid turns, and the heat distribution is more uniform.

Description

Technical Field

[0001] The present application relates to the field of hot runner technology, and in particular to a hot runner assembly. Background Art

[0002] In the manifold, the heat distribution of the fluid at the bend will be redistributed due to shear, resulting in uneven heat distribution of the fluid, affecting the final product formation and causing unbalanced injection molding of multi-cavity products. Summary of the Invention

[0003] The purpose of the present application is to provide a hot runner assembly, in which a steering member is arranged in a manifold. The fluid undergoes a flip when passing through the steering member, disrupting the fluid, thereby solving the problem of uneven fluid heat in the prior art.

[0004] In order to achieve one of the above-mentioned purposes of the utility model, an embodiment of the present application provides a hot runner assembly, comprising:

[0005] A diverter plate is provided with a first flow channel and a second flow channel intersecting each other, and a connecting groove connecting the first flow channel and the second flow channel, a first connecting hole and a second connecting hole are formed at the connection between the first flow channel and the second flow channel and the connecting groove, and the connecting groove opens toward one side of the diverter plate;

[0006] A steering member is arranged in the connecting groove and closes the opening of the connecting groove. The steering member is spaced apart from the first connecting hole, and in the axial direction of the first flow channel, the steering member at least partially blocks the first connecting hole. The steering member is provided with a flip cavity connected to the second flow channel, and the flip cavity is connected to the connecting groove away from one end of the second flow channel.

[0007] As a further improvement of one embodiment of the present application, the side of the opening of the connecting groove is the first side of the diverter plate, the plane where the first side of the diverter plate is located is the first side surface, and the flip cavity is away from the first side surface of the diverter plate perpendicular to the end of the second flow channel.

[0008] As a further improvement of an embodiment of the present application, the opening direction of the inversion cavity away from the second flow channel is opposite to the opening direction of the connecting groove.

[0009] As a further improvement of an embodiment of the present application, the depth of the connecting groove is greater than the maximum distance between the first flow channel and the first side surface of the diverter plate.

[0010] As a further improvement of an embodiment of the present application, the steering member extends to contact the bottom wall of the connecting groove away from the opening, and the steering member is also provided with a through hole connecting the flip cavity and the connecting groove.

[0011] As a further improvement of an embodiment of the present application, the through hole is semicircular, and the semicircular through hole passes through the end surface of one end of the bottom wall of the steering member contacting the connecting groove.

[0012] As a further improvement of an embodiment of the present application, two first flow channels are provided, and the two first flow channels are coaxially arranged on both sides of the steering member.

[0013] As a further improvement of an embodiment of the present application, the second flow channel is perpendicular to the first flow channel, and the steering member is symmetrical along the axis of the second flow channel.

[0014] As a further improvement of one embodiment of the present application, the steering member is further provided with a stop portion matching the cross-section of the connecting groove and a cover portion connected to the stop portion. The stop portion is arranged in the connecting groove and the length of the stop portion is not greater than the minimum distance between the first flow channel and the second flow channel and the side of the diverter plate where the connecting groove is provided, and the cover portion can completely cover the opening of the connecting groove.

[0015] As a further improvement of one embodiment of the present application, the diverter plate is provided with a positioning groove located next to the connecting groove, the cover body is provided with a positioning hole corresponding to the positioning groove, and the hot runner assembly is also provided with a positioning pin, which is inserted into the positioning hole and the positioning groove.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0017] In the hot runner assembly provided in the present application, a steering member is provided at the connection point between the first flow channel and the second flow channel. One end of the flip cavity provided in the steering member is connected to the second fluid, and the other end is connected to the connecting groove. The steering member is spaced apart from the first connecting hole and partially blocks the first connecting hole in the axial direction of the first flow channel, so that the fluid in the first flow channel cannot be directly connected to the second flow channel, but needs to first enter the connecting groove and then be flipped under the action of the steering member before it can be connected to the second flow channel. During the flipping process, the fluid is disturbed and the heat is rearranged, which is more conducive to the uniform distribution of heat in the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the hot runner assembly in the embodiment of the present application.

[0019] Figure 2 yes Figure 1 Top view of the hot runner assembly.

[0020] Figure 3 yes Figure 2 Schematic cross-sectional view along line AA.

[0021] Figure 4 yes Figure 1 Front view of the hot runner.

[0022] Figure 5 yes Figure 4 Schematic cross-sectional view along line BB.

[0023] Figure 6 yes Figure 5 Enlarged view of point C in the middle.

[0024] Figure 7 yes Figure 1 Schematic diagram of the structure of the steering component.

[0025] 1. Diverter plate; 11. First flow channel; 12. Second flow channel; 13. Connecting groove; 14. First connecting hole; 15. Second connecting hole; 16. Positioning groove; 2. Steering member; 21. Turning cavity; 22. Through hole; 23. Stopper; 231. Positioning hole; 24. Cover. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] As used herein, terms such as "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" that indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one element or feature relative to another element or feature as shown in the accompanying drawings. Spatially relative terms may be intended to encompass different orientations of the device in use or operation other than the orientation shown in the drawings.

[0028] For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] Furthermore, it should be understood that although the terms first, second, etc. may be used herein to describe various elements or structures, these described objects should not be limited by these terms. These terms are merely used to distinguish these described objects from each other. For example, a first flow channel may be referred to as a second flow channel, and similarly, a second flow channel may be referred to as a first flow channel without departing from the scope of protection of this application.

[0031] The present application embodiment provides a hot runner assembly, such as Figures 1 to 7 As shown, it includes a diverter plate 1 and a steering member 2 arranged in the diverter plate 1, the diverter plate 1 is provided with an intersecting first flow channel 11, a second flow channel 12 and a connecting groove 13 connecting the first flow channel 11 and the second flow channel 12, and a first connecting hole 14 and a second connecting hole 15 are respectively formed at the connection between the first flow channel 11 and the second flow channel 12 and the connecting groove 13, and the connecting groove 13 is open to one side of the diverter plate 1; the steering member 2 is arranged in the connecting groove 13 and closes the opening of the connecting groove 13, the steering member 2 is spaced apart from the first connecting hole 14, and in the axial direction of the first flow channel 11, the steering member 2 at least partially blocks the first connecting hole 14, and the steering member 2 is provided with a flip cavity 21 connected to the second flow channel 12, and the flip cavity 21 is connected to the connecting groove 13 away from the end of the second flow channel 12.

[0032] Since the diverter plate 1 is an irregular plate with a certain thickness, it has two planes with larger areas and multiple side walls perpendicular to the two planes, such as Figure 1 In the embodiment, the opening of the connecting groove 13 faces one of the two planes with a larger area in the manifold 1, which is called the first side surface, that is, the side to which the opening of the connecting groove 13 faces is the first side. Figure 1 The first side surface provided with the connecting groove 13 is used as the top wall, and the side opposite to the top wall is the bottom wall, which is convenient for the following description and understanding. The first flow channel 11 and the second flow channel 12 are provided parallel to the first side surface.

[0033] like Figure 3 In the figure, the steering member 2 is arranged in the connecting groove 13 and closes the opening of the connecting groove 13 to prevent the fluid from overflowing from the connecting groove 13. The steering member 2 is connected to the first connecting hole 14 and is arranged at an interval, so that the fluid in the first flow channel 11 can flow into the cavity of the connecting groove 13. In the axial direction of the first flow channel 11, the rotating member at least partially blocks the first connecting hole 14, so that the fluid cannot directly enter the connecting groove 13 along the axial direction of the first flow channel 11, but needs to change the heat distribution of the fluid by narrowing the flow path, or generate a drop in the direction perpendicular to the first flow channel 11 of the fluid to disrupt the fluid and cause a change in the heat distribution of the fluid, and then enter the second flow channel 12 through the flipping cavity 21, so as to disrupt the original heat distribution when the fluid turns, redistribute the heat of the fluid, and avoid uneven heat distribution affecting the molding of the product.

[0034] In some embodiments, the flip cavity 21 is perpendicular to the first side surface of the diverter plate 1 at one end away from the second flow channel 12. The flip cavity 21 is L-shaped, with one end connected to the second flow channel 12, and the opening at one end of the flip cavity 21 connected to the second flow channel 12 is the same size as the second connecting hole 15, so that the flip cavity 21 and the second flow channel 12 can face each other, allowing the fluid to pass smoothly. The other end of the flip cavity 21 is connected to the connecting groove 13, and the fluid makes a 90° turn in the flip cavity and can flip again to redistribute the heat of the fluid. Of course, the flip cavity 21 can also be at an acute angle or an obtuse angle, and be connected to the connecting groove 13 in an inclined manner away from the end of the second flow channel 12.

[0035] In some embodiments, the opening direction of the inversion cavity 21 away from the second flow channel 12 is opposite to the opening direction of the connecting groove 13. That is, the end of the inversion cavity 21 away from the second flow channel 12 faces the bottom wall of the connecting groove 13. The diverter 2 seals the upper half of the connecting groove 13, while the lower half of the connecting groove 13 still has a partial cavity for fluid to flow through.

[0036] In some embodiments, the depth of the connecting groove 13 is greater than the maximum distance between the first flow channel 11 and the first side surface of the manifold 1. Because there is a height difference between the connecting groove 13 and the first flow channel 11 in the thickness direction of the manifold 1, when the fluid flows from the first flow channel 11 through the first connecting hole 14 to the connecting groove 13, it will flow downward and fall to the bottom of the connecting groove 13. In other words, a turnover will occur at this point, disrupting the fluid and redistributing the heat of the fluid.

[0037] In some embodiments, the steering member 2 extends to contact the bottom wall of the connecting groove 13 away from the opening, and the steering member 2 is further provided with a through hole 22 connecting the flip cavity 21 and the connecting groove 13. Figure 3 In the example, the fluid flows in the first flow channel 11 toward the connecting groove 13. After passing through the first connecting hole 14, it enters the connecting groove 13 due to the thickness difference between the connecting groove 13 and the first flow channel 11, completing one turn. In the connecting groove 13, it passes through the through hole 22 and enters the turning cavity 21, then flows upward along the turning cavity 21, completing a second turn. The fluid makes a 90° turn within the turning cavity 21, completing a third turn. The three turns of the fluid as it enters the second flow channel 12 from the first flow channel 11 significantly disturb the fluid, causing multiple rearrangements of heat within the fluid and achieving more uniform heat distribution.

[0038] In some embodiments, the through hole 22 is semicircular and extends through the end surface of the steering member 2 where it contacts the bottom wall of the connecting groove 13. That is, the steering member 2 extends from one end abutting the bottom wall of the connecting groove 13 to the other end, forming a semicircular arc-shaped gap. After one end of the steering member 2 abuts the bottom wall of the connecting groove 13, a semicircular through hole 22 is formed between the semicircular arc and the bottom wall of the connecting groove 13. After entering the connecting groove 13, the fluid must flow to the bottom of the connecting groove 13 before it can pass through the through hole 22 and enter the turnover chamber 21. This increases the fluid flow path and allows sufficient time for heat rearrangement after the first turnover.

[0039] In some embodiments, as Figure 5 、 6 In the embodiment, two first flow channels 11 are provided, and the two first flow channels 11 are coaxially provided on both sides of the steering member 2. Of course, two second flow channels 12 can also be provided, and the end of the inversion cavity 21 communicating with the connecting groove 13 has two openings for communicating with the two second flow channels 12.

[0040] In some embodiments, the second flow channel 12 is perpendicular to the first flow channel 11, and the diverter 2 is symmetrical along the axis of the second flow channel 12. The second flow channel 12 is perpendicular to the first flow channel 11, that is, the second flow channel 12 forms a T-shape with the two first flow channels 11. This makes the diverter 2 symmetrical along the axis of the second flow channel 12 and also facilitates the design of the position distribution of the flow channels in the manifold 1.

[0041] In some embodiments, the steering member 2 is further provided with a stop portion 23 that matches the cross-section of the connecting groove 13 and a cover body portion 24 connected to the stop portion 23. The stop portion 23 is arranged in the connecting groove 13 and the length of the stop portion 23 is not greater than the minimum distance between the first flow channel 11 and the second flow channel 12 on one side where the connecting groove 13 is provided. The cover body portion 24 can completely cover the opening of the connecting groove 13.

[0042] The cross section of the stopper 23 matches the cross section of the connecting groove 13, so that the stopper 23 can be inserted into the connecting groove 13, thereby preventing the fluid from overflowing upward from the opening of the connecting groove 13, and then cooperating with the cover body 24 to completely cover the opening of the connecting groove 13, further preventing the fluid from overflowing from the opening of the connecting groove 13.

[0043] In some embodiments, the manifold 1 is provided with a positioning groove 16 located next to the connecting groove 13, the cover 24 is provided with a positioning hole 231 corresponding to the positioning groove 16, and the hot runner assembly is further provided with a positioning pin, which is inserted into the positioning hole 231 and the positioning groove 16. Figure 1The positioning pin is not shown to avoid obscuring the positioning slot 16. The inversion cavity 21 of the steering member 2 communicates with the second flow channel 12 via the second connecting hole 15. Using a positioning pin inserted into the positioning hole 231 and the positioning slot 16 prevents the steering member 2 from rotating within the connecting slot 13, thereby preventing misalignment between the inversion cavity 21 and the second connecting hole 15, which could affect fluid flow.

[0044] The description herein is based on the direction in which the fluid flows from the first flow channel 11 to the second flow channel 12 . However, the present application does not limit the flow direction of the fluid; the fluid may also flow from the second flow channel 12 to the first flow channel 11 .

[0045] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0046] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of this application. They are not intended to limit the scope of protection of this application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of this application should be included in the scope of protection of this application.

Claims

1. A hot runner assembly, characterized in that: include: A diverter plate is provided with a first flow channel and a second flow channel intersecting each other, and a connecting groove connecting the first flow channel and the second flow channel, a first connecting hole and a second connecting hole are formed at the connection between the first flow channel and the second flow channel and the connecting groove, and the connecting groove opens toward one side of the diverter plate; A steering member is arranged in the connecting groove and closes the opening of the connecting groove. The steering member is spaced apart from the first connecting hole, and in the axial direction of the first flow channel, the steering member at least partially blocks the first connecting hole. The steering member is provided with a flip cavity connected to the second flow channel, and the flip cavity is connected to the connecting groove away from one end of the second flow channel.

2. The hot runner assembly according to claim 1, characterized in that: The opening side of the connecting groove is the first side of the diverter plate, the plane where the first side of the diverter plate is located is the first side surface, and the end of the flip cavity away from the second flow channel is perpendicular to the first side surface of the diverter plate.

3. The hot runner assembly according to claim 2, characterized in that: The opening direction of the inversion cavity away from the second flow channel is opposite to the opening direction of the connecting groove.

4. The hot runner assembly according to claim 3, characterized in that: The depth of the connecting groove is greater than the maximum distance between the first flow channel and the first side surface of the diverter plate.

5. The hot runner assembly according to claim 4, characterized in that: The steering member extends to contact the bottom wall of the connecting groove away from the opening, and the steering member is further provided with a through hole communicating with the turnover cavity and the connecting groove.

6. The hot runner assembly according to claim 5, characterized in that: The through hole is semicircular in shape and passes through the end surface of one end of the steering member contacting the bottom wall of the connecting groove.

7. The hot runner assembly according to any one of claims 1 to 5, characterized in that: Two first flow channels are provided, and the two first flow channels are coaxially arranged on both sides of the steering member.

8. The hot runner assembly according to claim 7, wherein: The second flow channel is perpendicular to the first flow channel, and the steering member is symmetrical along the axis of the second flow channel.

9. The hot runner assembly according to claim 1, wherein: The steering member is also provided with a stop portion that matches the cross-section of the connecting groove and a cover body portion connected to the stop portion. The stop portion is arranged in the connecting groove and the length of the stop portion is not greater than the minimum distance between the first flow channel and the second flow channel and the side of the diverter plate where the connecting groove is provided. The cover body portion can completely cover the opening of the connecting groove.

10. The hot runner assembly according to claim 9, wherein: The manifold is provided with a positioning groove beside the connecting groove, the cover body is provided with a positioning hole corresponding to the positioning groove, and the hot runner assembly is also provided with a positioning pin, which is inserted into the positioning hole and the positioning groove.

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