Detachable hot nozzle sleeve assembly

Abstract

The utility model discloses a detachable hot nozzle sleeve assembly which comprises a hot nozzle and a hot nozzle sleeve, the hot nozzle sleeve comprises a sleeve body and an insert which are detachably connected, the sleeve body is in a hollow cylinder shape, a top port of the insert is embedded in a bottom port of the sleeve body, and the insert is arranged in the sleeve body. The top end opening and the bottom end opening are fixedly connected through a pair of pins penetrating through the top end opening and the bottom end opening, the pins are symmetrically arranged relative to the axis of the hot nozzle sleeve and extend in the radial direction, the hot nozzle stretches into the sleeve body, and the bottom of the hot nozzle is connected with the insert in a clamped mode. A glue outlet located in the bottom end of the hot nozzle is right opposite to a through hole in the bottom end of the insert, and the peripheral wall of the bottom end of the hot nozzle is tightly attached to the inner wall of the top port. According to the scheme, the hot nozzle sleeve is of a split structure in which the sleeve body and the insert are detachably connected, so that the inner contour of the insert can be finely machined conveniently, the inner contour of the insert and the bottom end of the hot nozzle can be matched with each other with high precision, no glue leakage at a glue sealing part of the hot nozzle sleeve is ensured, and the machining precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot nozzle sleeves, in particular to a detachable hot nozzle sleeve assembly. Background Art

[0002] A hot runner is a heating component system used in injection molds to inject melted plastic particles into the mold cavity. To protect the hot nozzle, a matching hot nozzle sleeve is usually placed on the outside of the hot nozzle to match it.

[0003] The bottom of the nozzle sleeve needs to fit tightly against the bottom exterior of the hot nozzle to achieve a seal. However, conventional hot nozzles and nozzle sleeves, as disclosed in Publication No. CN 105196485 B, are one-piece structures with a relatively deep interior. This results in limited machining precision for the nozzle sleeve bottom, making it difficult to ensure high accuracy and verifying the tightness of the internal fit. This makes it easy for the nozzle sleeve to seal the hot nozzle and nozzle sleeve together, leading to glue leaks after extended production due to insufficient precision. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a detachable hot nozzle sleeve assembly.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A detachable hot nozzle sleeve assembly includes a hot nozzle and a hot nozzle sleeve, the hot nozzle sleeve includes a detachably connected sleeve body and an insert, the sleeve body is hollow cylindrical, the top port of the insert is embedded in the bottom port of the sleeve body, the top port and the bottom port are fixedly connected by a pair of pins passing through the two, the pair of pins are symmetrically arranged relative to the axis of the hot nozzle sleeve and extend radially, the hot nozzle extends into the sleeve body and the bottom of the hot nozzle is clamped with the insert, the glue outlet located at the bottom end of the hot nozzle is opposite to the through hole at the bottom end of the insert, and the outer peripheral wall of the bottom end of the hot nozzle is in close contact with the inner wall of the top port.

[0007] Preferably, two pin holes are symmetrically formed between the top port and the bottom port and pass through the two, and the pins are inserted into the pin holes to fix the sleeve and the insert.

[0008] Preferably, the pin hole includes a first channel, a second channel and a third channel, the outer wall of the top port has a first groove, the inner wall of the bottom port has a second groove, the first groove and the second groove match each other, the first channel and the third channel are radially penetrated into the bottom port, and are symmetrically arranged at both ends of the second groove, when the top port is embedded in the bottom port, the first groove and the second groove are spliced ​​to form the second channel, and at the same time, the two ends of the second channel are coaxially docked with the first channel and the second channel to form the pin hole.

[0009] Preferably, the cross-section at the center of the first groove and the second groove is semicircular.

[0010] Preferably, the pin hole includes a first channel, a second channel and a third channel, the first channel and the third channel are radially penetrated into the bottom port respectively, and the second channel is radially penetrated into the top port. When the top port is embedded in the bottom port, the two ends of the second channel are coaxially connected with the first channel and the third channel to form the pin hole.

[0011] Preferably, the bottom end of the hot nozzle has an outwardly convex step surface, and the inner wall of the insert has a groove matching the step surface. The step surface is clamped in the groove, and the step surface is tightly fitted with the groove surface of the groove.

[0012] Preferably, a glue channel for feeding glue is provided at the axis of the hot nozzle, and the bottom of the glue channel is connected to two symmetrically arranged glue outlets, and the two glue outlets are connected to the through hole.

[0013] Preferably, the inner wall diameter of the insert gradually decreases from top to bottom, including a first-level inclined surface and a second-level inclined surface, the first-level inclined surface is an arc surface, the second-level inclined surface is a straight surface, and the connection between the first-level inclined surface and the second-level inclined surface is opposite to the axis of the glue outlet.

[0014] Preferably, the aperture of the through hole gradually expands from top to bottom to form a trumpet shape.

[0015] The beneficial effects of the present invention are mainly reflected in:

[0016] 1. The traditional one-piece nozzle sleeve is set into a split structure with a detachable sleeve body and insert to facilitate the fine processing of the inner contour of the insert, so that the inner contour of the insert and the bottom of the nozzle can be matched with high precision to ensure that there is no glue leakage at the sealing point of the nozzle sleeve and improve the processing accuracy;

[0017] 2. A pin is set between the sleeve and the insert to pass through the two to achieve quick connection and disassembly between the two, which is convenient and quick. At the same time, the pin is set to a radially penetrated structure. On the one hand, the pin can be displaced without being affected by gravity, and then it does not need other fixed structures. The structure of the connection between the sleeve and the insert is simplified to the greatest extent, and the convenience of connection between the two is improved; on the other hand, the radial penetration of the pin can ensure that the sleeve and the insert will not loosen or have errors in the axial direction, further maintaining the stability and reliability of the seal between the insert and the hot nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the utility model is further described below with reference to the accompanying drawings:

[0019] Figure 1 : A combined sectional view of an embodiment of the present utility model;

[0020] Figure 2 : Figure 1 A magnified schematic diagram of part A;

[0021] Figure 3 : A separate cross-sectional view of an embodiment of the present invention;

[0022] Figure 4 : Explosion diagram of an embodiment of the utility model;

[0023] Figure 5 : A perspective view of a hot nozzle sleeve in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by a person skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0025] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0026] like Figures 1 to 5As shown, the utility model discloses a detachable hot nozzle sleeve assembly, comprising a hot nozzle 1 and a hot nozzle sleeve 2, the hot nozzle sleeve 2 comprising a detachably connected sleeve body 201 and an insert 202, the sleeve body 201 is hollow cylindrical, the top port 2021 of the insert 202 is embedded in the bottom port 2011 of the sleeve body 201, the top port 2021 and the bottom port 2011 are fixedly connected by a pair of pins 3 passing through the two, the pair of pins 3 are symmetrically arranged relative to the axis of the hot nozzle sleeve 2 and extend radially, the hot nozzle 1 extends into the sleeve body 201 and the bottom of the hot nozzle 1 is clamped with the insert 202, the glue outlet 101 located at the bottom end of the hot nozzle 1 is opposite to the through hole 2022 at the bottom end of the insert 202, and the outer peripheral wall of the bottom end of the hot nozzle 1 is in close contact with the inner wall of the top port 2021.

[0027] This solution configures the traditional one-piece hot nozzle sleeve into a split structure in which the sleeve body 201 and the insert 202 are detachably connected, so as to facilitate the fine processing of the inner contour of the insert 202, so that the inner contour of the insert 202 and the bottom end of the hot nozzle 1 are matched with high precision, to ensure that there is no glue leakage at the sealing point of the hot nozzle sleeve 2, thereby improving the processing accuracy.

[0028] Specifically, two pin holes 203 are symmetrically formed between the top port 2021 and the bottom port 2011, extending through the two. The pins 3 are inserted into the pin holes 203 to securely connect the sleeve 201 and the insert 202. The pin holes 203 extending through the sleeve 201 and the insert 202 are configured to facilitate quick connection and removal of the two. In this embodiment, the pins 3 are arranged in a radially extending configuration. "Axial" in this embodiment refers to the axial direction of the nozzle sleeve 2, and "radial" refers to a direction perpendicular to the axial direction of the nozzle sleeve 2. On the one hand, such a structure allows the pin 3 to be displaced without being affected by gravity, and thus the pin 3 itself does not require any other fixing structure, thereby simplifying the structure of the connection between the sleeve 201 and the insert 202 to the greatest extent, and improving the convenience of connection between the two; on the other hand, the radial penetration of the pin 3 can ensure that the sleeve 201 and the insert 202 will not be loose or have errors in the axial direction, further maintaining the stability and reliability of the seal between the insert 202 and the hot nozzle 1.

[0029] In this solution, the pin hole 203 has two feasible embodiments, such as Figure 1-Figure 5 The preferred embodiment shown is a first embodiment of the pin hole 203 .

[0030] In the first embodiment, the pin hole 203 includes a first channel, a second channel and a third channel. The outer wall of the top port 2021 has a first groove 2023, and the inner wall of the bottom port 2011 has a second groove 2013. The first groove 2023 matches the second groove 2013. The first channel and the third channel are radially penetrated into the bottom port 2011 respectively and are symmetrically arranged at the two ends of the second groove 2013. When the top port 2021 is embedded in the bottom port 2011, the first groove 2023 and the second groove 2013 are spliced ​​to form the second channel, and at the same time, the two ends of the second channel are coaxially docked with the first channel and the second channel to form the pin hole 203. At this time, the pin 3 can be penetrated into the pin hole 203 to connect the sleeve 201 and the insert 202.

[0031] Furthermore, in the preferred embodiment shown in the figures, the cross-sections at the centers of the first groove 2023 and the second groove 2013 are semicircular. This structure facilitates processing and allows the centers of the first groove 2023 and the second groove 2013 to be as symmetrical as possible, so that they can respectively cooperate with the pin 3, ensuring balanced forces on both sides of the pin 3 and preventing the top port 2021 of the insert 202 from slipping out of the bottom port 2011 of the housing 201.

[0032] The second embodiment of the pin hole 203 primarily differs from the first embodiment in that the second channel is different. In the second embodiment, the pin hole 203 includes a first channel, a second channel, and a third channel. The first channel and the third channel are radially penetrated within the bottom port 2011, respectively, while the second channel is radially penetrated within the top port 2021. This means that the second channel is a through-hole that extends completely through the top port 2021. When the top port 2021 is embedded within the bottom port 2011, the two ends of the second channel can directly mate coaxially with the first and third channels to form the pin hole 203.

[0033] like Figure 2 and Figure 3 As shown, the bottom end of the hot nozzle 1 has an outwardly convex stepped surface 103, and the inner wall of the insert 202 has a groove 2024 that matches the stepped surface 103. The stepped surface 103 is locked in the groove 2024, and the stepped surface 103 and the groove surface of the groove 2024 are tightly fitted. This structure can improve the fit between the bottom end of the hot nozzle 1 and the insert 202, so that the two achieve surface contact and sealing, achieving the purpose of sealing glue and preventing the glue from overflowing from the connection between the two.

[0034] The axis of the hot nozzle 1 is provided with a glue channel 102 for feeding glue. The bottom of the glue channel 102 is connected to two symmetrically arranged glue outlets 101, and the two glue outlets 101 are connected to the through hole 2022. This structure can avoid blockage caused by the glue outlets 101 and the through hole 2022 facing each other. The symmetrical structure is used to divert the glue in the glue channel 102 so that the glue flows out from the two glue outlets 101 separately, avoiding direct accumulation on the through hole 2022 and causing blockage, thereby ensuring smooth glue discharge.

[0035] Furthermore, the inner wall diameter of the insert 202 gradually decreases from top to bottom, and includes a first-stage inclined surface 2025 and a second-stage inclined surface 2026. The first-stage inclined surface 2025 is an arcuate surface, and the second-stage inclined surface 2026 is a straight surface. The junction of the first-stage inclined surface 2025 and the second-stage inclined surface 2026 is aligned with the axis of the glue outlet 101. The first-stage inclined surface 2025 is an arcuate surface, which can increase the volume therein to accommodate the glue. At the same time, the structure in which the connection between the first-level inclined surface 2025 and the second-level inclined surface 2026 is directly opposite to the axis of the glue outlet 101 can utilize the difference in inclination between the first-level inclined surface 2025 and the second-level inclined surface 2026 to buffer the colloid rushing out of the glue outlet 101, so that the colloid flowing out of the glue outlet 101 is diverted, with part of the colloid flowing along the first-level inclined surface 2025 and part of the colloid flowing along the second-level inclined surface 2026, thereby reducing the impact on the through hole 2022 and ensuring that the colloid at the through hole 2022 flows as uniformly as possible.

[0036] The aperture of the through hole 2022 gradually expands from top to bottom to form a trumpet shape to facilitate the outflow of the colloid.

[0037] 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.

[0038] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A detachable nozzle sleeve assembly, comprising a nozzle (1) and a nozzle sleeve (2), characterized in that: The hot nozzle sleeve (2) comprises a sleeve body (201) and an insert (202) that are detachably connected. The sleeve body (201) is hollow and cylindrical. The top port (2021) of the insert (202) is embedded in the bottom port (2011) of the sleeve body (201). The top port (2021) and the bottom port (2011) are fixedly connected by a pair of pins (3) that pass through the two. The pair of pins (3) are symmetrically arranged relative to the axis of the hot nozzle sleeve (2) and extend radially. The hot nozzle (1) extends into the sleeve body (201) and the bottom of the hot nozzle (1) is snap-fitted with the insert (202). The glue outlet (101) at the bottom end of the hot nozzle (1) is opposite to the through hole (2022) at the bottom end of the insert (202). The outer peripheral wall of the bottom end of the hot nozzle (1) is in close contact with the inner wall of the top port (2021).

2. The detachable nozzle sleeve assembly according to claim 1, characterized in that: Two pin holes (203) are symmetrically formed between the top port (2021) and the bottom port (2011) and pass through the two. The pins (3) are inserted into the pin holes (203) to fix the sleeve (201) and the insert (202).

3. The detachable nozzle sleeve assembly according to claim 2, characterized in that: The pin hole (203) includes a first channel, a second channel, and a third channel. A first groove (2023) is provided on the outer wall of the top port (2021), and a second groove (2013) is provided on the inner wall of the bottom port (2011). The first groove (2023) and the second groove (2013) match each other. The first channel and the third channel are radially penetrated in the bottom port (2011) and symmetrically arranged at the two ends of the second groove (2013). When the top port (2021) is embedded in the bottom port (2011), the first groove (2023) and the second groove (2013) are combined to form the second channel, and at the same time, the two ends of the second channel are coaxially connected with the first channel and the second channel to form the pin hole (203).

4. The detachable nozzle sleeve assembly according to claim 3, characterized in that: The cross-section at the center of the first groove (2023) and the second groove (2013) is semicircular.

5. The detachable nozzle sleeve assembly according to claim 2, characterized in that: The pin hole (203) comprises a first channel, a second channel and a third channel, wherein the first channel and the third channel are radially penetrated in the bottom port (2011) respectively, and the second channel is radially penetrated in the top port (2021); when the top port (2021) is embedded in the bottom port (2011), the two ends of the second channel are coaxially connected with the first channel and the third channel to form the pin hole (203).

6. The detachable nozzle sleeve assembly according to any one of claims 1 to 5, characterized in that: The bottom end of the hot nozzle (1) has an outwardly convex step surface (103), and the inner wall of the insert (202) has a groove (2024) that matches the step surface (103). The step surface (103) is clamped in the groove (2024), and the step surface (103) is tightly fitted with the groove surface of the groove (2024).

7. The detachable nozzle sleeve assembly according to claim 6, characterized in that: The axis of the hot nozzle (1) is provided with a glue channel (102) for feeding glue, and the bottom of the glue channel (102) is connected to two symmetrically arranged glue outlets (101), and the two glue outlets (101) are connected to the through hole (2022).

8. The detachable nozzle sleeve assembly according to claim 7, characterized in that: The inner wall diameter of the insert (202) gradually decreases from top to bottom, and includes a first-level inclined surface (2025) and a second-level inclined surface (2026), wherein the first-level inclined surface (2025) is an arc-shaped surface, and the second-level inclined surface (2026) is a straight surface, and the connection between the first-level inclined surface (2025) and the second-level inclined surface (2026) is directly opposite to the axis of the glue outlet (101).

9. The detachable nozzle sleeve assembly according to claim 7, characterized in that: The aperture of the through hole (2022) gradually expands from top to bottom to form a trumpet shape.

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