Positioning ring assembly and hot runner system

Abstract

The invention provides a positioning ring assembly and a hot runner system. The positioning ring assembly comprises a first positioning ring; the second positioning ring is fixed to the first positioning ring, and an annular cavity with an inward opening is formed between the first positioning ring and the second positioning ring; the third positioning ring comprises a floating part arranged in the annular cavity and a fixing part connected with the floating part, the thickness of the floating part in the axial direction is equal to the thickness of the annular cavity in the axial direction, the fixing part is used for being fixed to a structure to be positioned, and the third positioning ring can move in the annular cavity in the radial direction. According to the positioning ring assembly, the third positioning ring can move in the radial direction relative to the first positioning ring and the second positioning ring, when the positioning ring assembly is used, the to-be-positioned structure fixed to the third positioning ring moves to drive the third positioning ring to move, but positioning can still be achieved when the first positioning ring is fixed.

Description

Technical Field

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

[0002] In the hot runner system, the positioning center and the positioning ring used to position the barrel are not on the same axis. After the manifold is heated, thermal expansion will cause displacement between the positioning center and the positioning ring, resulting in errors, which is inconvenient for workers to install the mold. Summary of the invention

[0003] The purpose of the present application is to provide a positioning ring assembly, wherein a circular ring cavity is provided between a first positioning ring and a second positioning ring, and a third positioning assembly is provided in the circular ring cavity and can move in the radial direction, thereby solving the problem in the prior art that when the positioning ring is fixed in use, positioning errors are generated after thermal expansion of the manifold, making it inconvenient to install the mold.

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

[0005] First positioning circle;

[0006] A second positioning ring is fixed to the first positioning ring, and a circular ring cavity opening inward is formed between the first positioning ring and the second positioning ring;

[0007] The third positioning ring includes a floating part arranged in the annular cavity and a fixed part connected to the floating part. The axial thickness of the floating part is equal to the axial thickness of the annular cavity. The fixed part is used to be fixed to the structure to be positioned. The third positioning ring can move radially in the annular cavity.

[0008] In one embodiment of the present application, a receiving groove is formed on one side of the first positioning ring, and the second positioning ring is fixed to the side of the first positioning ring provided with the receiving groove, and the inner diameter of the second positioning ring is less than the inner diameter of the receiving groove and less than the outer diameter of the second positioning ring, so as to form a circular ring cavity.

[0009] In one embodiment of the present application, the fixing portion is perpendicular to the floating portion and extends toward a side where the second positioning ring is disposed.

[0010] In one embodiment of the present application, the first positioning ring is provided with a receiving groove and a clearance groove on one side thereof, the inner diameter of the clearance groove is greater than the inner diameter of the receiving groove, and the second positioning ring is arranged in the clearance groove.

[0011] An embodiment of the present application further provides a hot runner system, comprising:

[0012] A flow divider plate is provided with a flow channel and a clearance cavity and a positioning member communicated with the flow channel, wherein the clearance cavity and the positioning member are arranged on two opposite sides of the flow divider plate;

[0013] A main nozzle, partially disposed in the give way cavity to communicate with the flow channel, the main nozzle protruding from the diverter plate, and the central axis of the main nozzle is not coaxial with the central axis of the positioning member;

[0014] A cover plate is fixed to a side of the diverter plate where the main nozzle is arranged;

[0015] In the aforementioned positioning ring assembly, the first positioning ring is fixed to the cover plate, and the third positioning ring is fixed to the main nozzle.

[0016] In one embodiment of the present application, the inner diameter of the first positioning ring gradually increases on a side away from the main nozzle.

[0017] In one embodiment of the present application, a hot runner plate is further included, wherein the hot runner plate is provided with a cavity opening toward one side, the diverter plate is arranged in the cavity, and a bottom wall of the cavity away from the opening is provided with a first positioning groove corresponding to the positioning member, and the positioning member is arranged in the first positioning groove.

[0018] In one embodiment of the present application, the cover plate is disposed on the opening side of the cavity and is formed with a clearance hole for the main nozzle to pass through.

[0019] In one embodiment of the present application, a second positioning groove is provided on one side of the cover plate to which the first positioning ring is fixed, the inner circumference shape of the second positioning groove matches the outer circumference shape of the first positioning ring, and the first positioning ring is provided in the second positioning groove.

[0020] In one embodiment of the present application, in the axial direction of the first positioning ring, the thickness of the first positioning ring is greater than the depth of the first positioning groove.

[0021] One or more technical solutions provided by this application have at least the following technical effects or advantages:

[0022] In the positioning ring assembly provided by the present application, a circular ring cavity is formed between the first positioning ring and the second positioning ring, and the third positioning ring is partially arranged in the circular ring cavity. The third positioning ring is fixed to the circular ring cavity in the axial direction and can move in the radial direction, so that the third positioning ring can move relative to the first positioning ring and the second positioning ring, so that when the positioning ring assembly is fixed with the first positioning ring, the third positioning ring can move with the movement of the structure to be positioned. When the positioning ring assembly is installed in the hot runner system, the third positioning ring is fixed on the positioning piece, and the error caused by thermal expansion can be eliminated by moving the third positioning ring to facilitate mold installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the positioning ring assembly in the embodiment of the present application.

[0024] Figure 2 yes Figure 1 Front view of the center locating ring assembly.

[0025] Figure 3 yes Figure 2 Schematic cross-sectional view along line AA.

[0026] Figure 4 It is a schematic diagram of the structure of the hot runner system in an embodiment of the present application.

[0027] Figure 5 yes Figure 4 Top view of the hot runner system.

[0028] Figure 6 yes Figure 5 Schematic cross-sectional view along line BB.

[0029] Figure 7 yes Figure 6 Enlarged view of center C.

[0030] 10. Positioning ring assembly; 20. manifold; 201. flow channel; 202. clearance cavity; 203. positioning member; 30. main nozzle; 40. cover plate; 401. clearance hole; 402. second positioning groove; 50. hot runner plate; 501. cavity; 502. first positioning groove;

[0031] 1. First positioning ring; 11. Accommodating groove; 12. Displacement groove; 2. Second positioning ring; 3. Third positioning ring; 31. Floating part; 32. Fixed part. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 positioning ring may be referred to as a second positioning ring, and similarly, a second positioning ring may also be referred to as a first positioning ring, which does not deviate from the scope of protection of the present application.

[0037] The present application embodiment provides a positioning ring assembly 10, such as Figures 1 to 3 As shown, it includes a first positioning ring 1, a second positioning ring 2 and a third positioning ring 3 connected to each other, the second positioning ring 2 is fixed to the first positioning ring 1, and a circular ring cavity opening inward is formed between the first positioning ring 1 and the second positioning ring 2; the third positioning ring 3 includes a floating part 31 arranged in the circular ring cavity and a fixed part 32 connected to the floating part 31, the thickness of the floating part 31 in the axial direction is equal to the thickness of the circular ring cavity in the axial direction, the fixed part 32 is used to be fixed to the structure to be positioned, and the third positioning ring 3 can move radially in the circular ring cavity. Among them, "inside" refers to the direction of the first positioning ring 1 / the second positioning ring 2 / the third positioning ring 3 in the radial direction toward the central axis, because the first positioning ring 1, the second positioning ring 2 and the third positioning ring 3 are all annular structures with thickness, and "axial" can refer to the axial direction of the first positioning ring 1 / the second positioning ring 2 / the third positioning ring 3, and can also be the axial direction of the positioning ring assembly 10.

[0038] In the positioning ring assembly 10 provided in the present application, the first positioning ring 1 and the second positioning ring 2 are fixed in position, and the third positioning ring 3 can move radially. When the positioning ring assembly 10 is applied to the hot runner 201 system, after the third positioning ring 3 is fixed to the part to be positioned, the displacement between the positioning ring assemblies 10 can eliminate the error caused by thermal expansion.

[0039] In one embodiment of the present application, a receiving groove 11 is formed on one side of the first positioning ring 1, and the second positioning ring 2 is fixed to the side of the first positioning ring 1 provided with the receiving groove 11, and the inner diameter of the second positioning ring 2 is less than the inner diameter of the receiving groove 11 and less than the outer diameter of the second positioning ring 2 to form a circular ring cavity.

[0040] Since the opening of the annular cavity faces inward, the receiving groove 11 opens inward in addition to the side facing the first positioning ring 1. The second positioning ring 2 is fixed to the side of the first positioning ring 1 provided with the receiving groove 11. The second positioning ring 2 can block the opening of the receiving groove 11 facing the side (not the inner side) of the first positioning ring 1, and the annular cavity can be obtained by matching the inner and outer diameters of the first positioning ring 1 and the inner diameter of the receiving groove 11.

[0041] In one embodiment of the present application, the first positioning ring 1 is provided with a receiving groove 11 and a clearance groove 12 on one side, the inner diameter of the clearance groove 12 is greater than the inner diameter of the receiving groove 11, and the second positioning ring 2 is arranged in the clearance groove 12. Figure 3 In the embodiment, a clearance groove 12 and a receiving groove 11 are sequentially arranged on the surface of one side of the first positioning ring 1, a floating portion 31 is arranged in the receiving groove 11, and a second positioning ring 2 is arranged in the clearance groove 12. In the axial direction, the depth of the clearance groove 12 is not less than the thickness of the second positioning ring 2, so that the second positioning ring 2 can be completely accommodated in the clearance groove 12, and the second positioning ring 2 can be fixed to the bottom of the clearance groove 12 by fasteners such as screws.

[0042] In one embodiment of the present application, the fixing portion 32 is perpendicular to the floating portion 31 and extends toward the side where the second positioning ring 2 is disposed. Figure 3 In the embodiment, the floating portion 31 and the fixed portion 32 are both annular structures, the floating portion 31 extends radially, the fixed portion 32 extends axially, and the two are perpendicular, so that the longitudinal section of the third positioning ring 3 is two L-shaped. The fixed portion 32 extends toward the side where the second positioning ring 2 is provided, and protrudes from the second positioning ring 2 to be fixed to the part to be positioned.

[0043] Regarding the application of the positioning ring assembly 10 provided in the present application, the embodiment of the present application also provides a hot runner system, which includes the aforementioned positioning ring assembly 10, and the hot runner system specifically includes a diverter plate 20, a main nozzle 30 and a cover plate 40 connected to the diverter plate 20, and the aforementioned positioning ring assembly 10 connected to the main nozzle 30, the diverter plate 20 is provided with a flow channel 201 and a make way cavity 202 and a positioning member 203 connected to the flow channel 201, the make way cavity 202 and the positioning member 203 are arranged on opposite sides of the diverter plate 20; the main nozzle 30 is partially arranged in the make way cavity 202 to be connected with the flow channel 201, the main nozzle 30 protrudes from the diverter plate 20, and the central axis of the main nozzle 30 is not coaxial with the central axis of the positioning member 203; the cover plate 40 is fixed to the side of the diverter plate 20 where the main nozzle 30 is provided; the first positioning ring 1 of the positioning ring assembly 10 is fixed to the cover plate 40, and the third positioning ring 3 is fixed to the main nozzle 30.

[0044] In the hot runner system provided by the embodiment of the present application, the positioning member 203 on the manifold 20 is not coaxially arranged with the main nozzle 30. When the manifold 20 is heated, the manifold 20 expands under the action of thermal expansion, and the distance between the positioning member 203 and the main nozzle 30 in the vertical axis direction will increase. The present application sets the third positioning ring 3 on the main nozzle 30 so that the third positioning ring 3 and the main nozzle 30 are fixed in the radial direction. The first positioning ring 1 is fixed on the cover plate 40. The main nozzle 30 moves slightly in the radial direction as the manifold 20 is deformed and expanded by heat, driving the third positioning ring 3 to move radially in the annular cavity, while the cover plate 40 is not heated or is heated less and hardly deformed. Therefore, the positioning ring assembly 10 is fixed in position and can still achieve positioning.

[0045] In one embodiment of the present application, the inner diameter of the first positioning ring 1 on the side away from the main nozzle 30 gradually increases, that is, the inner diameter of the first positioning ring 1 on the side used for positioning is increased, which is more conducive to positioning.

[0046] In one embodiment of the present application, the hot runner system further includes a hot runner plate 50, the hot runner plate 50 is provided with a cavity 501 opening toward one side, the manifold plate 20 is arranged in the cavity 501, the bottom wall of the cavity 501 away from the opening is provided with a first positioning groove 502 corresponding to the positioning member 203, and the positioning member 203 is arranged in the first positioning groove 502. When installing the manifold plate 20, align the positioning member 203 on the manifold plate 20 with the first positioning groove 502 to ensure that it is installed in place.

[0047] In one embodiment of the present application, the cover plate 40 is disposed on the opening side of the cavity 501 and is formed with a clearance hole 401 for the main nozzle 30 to pass through. The cover plate 40 covers the cavity 501 of the hot runner plate 50, which can prevent the heat loss of the manifold 20 on the one hand, and fix the first positioning ring 1 on the other hand. The hot runner plate 50 and the cover plate 40 can also be combined into a whole to facilitate position adjustment. The main nozzle 30 passes through the clearance hole 401 to be fixed to the third positioning ring 3.

[0048] In one embodiment of the present application, a second positioning groove 402 is provided on one side of the cover plate 40 to which the first positioning ring 1 is fixed, and the inner peripheral shape of the second positioning groove 402 matches the outer peripheral shape of the first positioning ring 1. The first positioning ring 1 is arranged in the second positioning groove 402 to facilitate the installation of the first positioning ring 1 on the cover plate 40 for positioning.

[0049] In one embodiment of the present application, in the axial direction of the first positioning ring 1 , the thickness of the first positioning ring 1 is greater than the depth of the first positioning groove 502 , so that the first positioning ring 1 can protrude from the cover plate 40 , making it more convenient to position the feed nozzle.

[0050] 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.

[0051] 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 positioning ring assembly, characterized in that: include: First positioning circle; A second positioning ring is fixed to the first positioning ring, and a circular ring cavity with an opening inward is formed between the first positioning ring and the second positioning ring; The third positioning ring includes a floating part arranged in the annular cavity and a fixed part connected to the floating part. The axial thickness of the floating part is equal to the axial thickness of the annular cavity. The fixed part is used to be fixed to the structure to be positioned. The third positioning ring can move radially in the annular cavity.

2. The positioning ring assembly according to claim 1, characterized in that: The first positioning ring has a receiving groove formed on one side, the second positioning ring is fixed to the side of the first positioning ring having the receiving groove, and the inner diameter of the second positioning ring is smaller than the inner diameter of the receiving groove and smaller than the outer diameter of the second positioning ring, so as to form an annular cavity.

3. The positioning ring assembly according to claim 2, characterized in that: The fixing portion is perpendicular to the floating portion and extends toward a side where the second positioning ring is disposed.

4. The positioning ring assembly according to claim 2, characterized in that: The first positioning ring is provided with a receiving groove and a giving groove on one side thereof, the inner diameter of the giving groove is greater than the inner diameter of the receiving groove, and the second positioning ring is arranged in the giving groove.

5. A hot runner system, characterized in that: include: A flow divider plate is provided with a flow channel and a clearance cavity and a positioning member communicated with the flow channel, wherein the clearance cavity and the positioning member are arranged on two opposite sides of the flow divider plate; A main nozzle, partially disposed in the give way cavity to communicate with the flow channel, the main nozzle protruding from the diverter plate, and the central axis of the main nozzle is not coaxial with the central axis of the positioning member; A cover plate is fixed to a side of the diverter plate where the main nozzle is arranged; The positioning ring assembly according to any one of claims 1 to 4, wherein the first positioning ring is fixed to the cover plate, and the third positioning ring is fixed to the main nozzle.

6. The hot runner system according to claim 5, characterized in that: The inner diameter of the first positioning ring gradually increases on a side away from the main nozzle.

7. The hot runner system according to claim 5, characterized in that: It also includes a hot runner plate, which is provided with a cavity opening toward one side, the diverter plate is arranged in the cavity, the bottom wall of the cavity away from the opening is provided with a first positioning groove corresponding to the positioning member, and the positioning member is arranged in the first positioning groove.

8. The hot runner system according to claim 7, characterized in that: The cover plate is arranged on the opening side of the cavity and is formed with a clearance hole for the main nozzle to pass through.

9. The hot runner system according to claim 8, characterized in that: A second positioning groove is arranged on one side of the cover plate where the first positioning ring is fixed, the inner peripheral shape of the second positioning groove matches the outer peripheral shape of the first positioning ring, and the first positioning ring is arranged in the second positioning groove.

10. The hot runner system according to claim 9, characterized in that: In the axial direction of the first positioning ring, the thickness of the first positioning ring is greater than the depth of the first positioning groove.

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