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, and the fluid is turned over once when passing through the steering member, thereby disturbing the fluid and solving the problem of uneven fluid heat in the prior art.

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

[0005] A splitter 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 splitter 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 an embodiment of the present application, one 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 perpendicular to the first side surface of the diverter plate away from one 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 an embodiment of the present application, the steering member is also provided with a stop portion matching 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, and the cover body portion can completely cover the opening of the connecting groove.

[0015] As a further improvement of one embodiment of the present application, the manifold 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 by 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 arranged at the connection point between the first flow channel and the second flow channel, one end of the flipping cavity arranged 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 of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the hot runner assembly in an 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 body. DETAILED DESCRIPTION

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

[0027] Terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative positions may be intended to include 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 clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to 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 only 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 also be referred to as a first flow channel, which does not deviate 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 second flow channel 12.

[0032] Since the splitter 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 connection 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 connection groove 13 faces is the first side. Figure 1 The first side surface provided with the connection 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 embodiment, 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, and 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 disturb the fluid and cause a change in the heat distribution of the fluid, and then enter the second flow channel 12 by flipping the 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 of the diverter plate 1 at one end away from the second flow channel 12. The flip cavity 21 is L-shaped, one end is 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 consistent in size with 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 the end away from the second flow channel 12 is connected to the connecting groove 13 in an inclined manner.

[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 connection groove 13, that is, the end of the inversion cavity 21 away from the second flow channel 12 faces the bottom wall of the connection groove 13. The steering member 2 seals the upper half of the connection groove 13, and the lower half of the connection groove 13 still has a partial cavity for fluid to flow through.

[0036] In some embodiments, the depth of the connection groove 13 is greater than the maximum distance between the first flow channel 11 and the first side surface of the manifold 1. Since there is a drop between the connection 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 to the connection groove 13 through the first connecting hole 14, it will flow downward and fall into the bottom of the connection groove 13, that is, a turnover will occur here, disturbing 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 also provided with a through hole 22 connecting the flip cavity 21 and the connecting groove 13. Figure 3 In the embodiment, the fluid flows in the first flow channel 11 toward the connecting groove 13, passes through the first connecting hole 14, enters the connecting groove 13 under the thickness difference between the connecting groove 13 and the first flow channel 11, and completes one flip; after passing through the through hole 22 in the connecting groove 13 and entering the flip cavity 21, it flows upward along the flip cavity 21, and completes the second flip; and makes a 90° turn in the flip cavity 21, and completes the third flip. The fluid undergoes three flips in the process of entering the second flow channel 12 from the first flow channel 11, which can greatly disturb the fluid, rearrange the heat in the fluid multiple times, and make the heat more uniform.

[0038] In some embodiments, the through hole 22 is semicircular, and the semicircular through hole 22 penetrates the end surface of the steering member 2 contacting the bottom wall of the connecting groove 13, that is, the steering member 2 extends from one end abutting against the bottom wall of the connecting groove 13 to the other end to form a semicircular arc-shaped gap, and after one end of the steering member 2 abuts against 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 needs to flow to the bottom of the connecting groove 13 before it can change to enter the flip cavity 21 through the through hole 22, which increases the flow path of the fluid and allows the fluid to have enough time for heat rearrangement after the first flip.

[0039] In some embodiments, Figure 5 , 6 In the embodiment, two first flow channels 11 are provided, and the two first flow channels 11 are coaxially arranged on both sides of the steering member 2. Of course, two second flow channels 12 can also be provided, and then 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 steering member 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 and the two first flow channels 11 form a T-shape, which can make the steering member 2 symmetrical along the axis of the second flow channel 12, and is also conducive to the design of the position distribution of the flow channel in the manifold 1.

[0041] In some embodiments, the steering member 2 is also 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 arranged, and 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 beside 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 1In order to avoid blocking the positioning groove 16, the positioning pin is not shown. The flip cavity 21 of the steering member 2 needs to be connected to the second flow channel 12 through the second connecting hole 15. The use of a positioning pin inserted in the positioning hole 231 and the positioning groove 16 can prevent the steering member 2 from rotating in the connecting groove 13, thereby preventing the flip cavity 21 and the second connecting hole 15 from being misaligned and affecting the flow of the fluid.

[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 , but the present application does not limit the flow direction of the fluid, and 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 according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 mode may also be appropriately combined to form other implementation modes 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 the present application. They are not intended to limit the scope of protection of the present application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A hot runner assembly, characterized in that: include: A splitter 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 splitter 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 also provided with a through hole connecting 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: There are two first flow channels, 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, characterized in that: 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, characterized in that: The steering member is also provided with a stop portion matching 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 arranged. The cover body portion can completely cover the opening of the connecting groove.

10. The hot runner assembly according to claim 9, characterized in that: 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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