CN217434912U - Hot runner gating system - Google Patents
Hot runner gating system Download PDFInfo
- Publication number
- CN217434912U CN217434912U CN202220356714.6U CN202220356714U CN217434912U CN 217434912 U CN217434912 U CN 217434912U CN 202220356714 U CN202220356714 U CN 202220356714U CN 217434912 U CN217434912 U CN 217434912U
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- Prior art keywords
- sprue
- needle
- hot runner
- valve needle
- mold core
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Abstract
The invention belongs to the technical field of molds, and particularly relates to a hot runner pouring system which comprises a mold core sprue opening frame, wherein a circular hole is formed in the mold core sprue opening frame, a nozzle cap is arranged on the inner wall of the mold core sprue opening frame, and a sprue bushing is arranged on the inner wall of the nozzle cap. The invention can avoid the problem of mould core abrasion caused by the traditional straight body glue sealing system and the problem of plastic part product glue opening flash caused by the mould core abrasion through the matching use of the structures such as the mould core sprue opening frame, the nozzle cap, the sprue bushing, the valve needle and the like, and the problem of impact abrasion of the valve needle to the mould core sprue when the pressure of the pressure cylinder pushes and closes the glue opening due to the fact that the pressure of the pressure cylinder is not enough to offset the glue opening height caused by the injection pressure in the mould core.
Description
Technical Field
The invention relates to the technical field of molds, in particular to a hot runner pouring system.
Background
As is well known, among the current hot runner systems, the needle valve type hot runner system is widely used due to its short molding cycle, high gate quality, high product balance, and high quality stability. The needle valve type hot runner system mainly has two types of straight body sealing glue and inclined plane sealing glue, but the traditional straight body sealing glue system also has certain defects, particularly depends on the size precision of a mold core opening and the strength of materials, the positioning precision of a needle is insufficient, the mold core is abraded, further, the gate flash of a plastic product is generated, the pressure of a pressure cylinder is not enough to offset the gate rising caused by the injection molding pressure inside the mold core, the needle is impacted by the flowing of plastic to generate the swing, and if the swing can not be eliminated through a lining, the needle pushes to close the gate by the pressure cylinder, so that the impact abrasion is generated on the mold core gate.
Disclosure of Invention
The invention aims to provide a hot runner casting system, which solves the problems that a mold core is abraded due to insufficient positioning precision of a valve needle of a traditional hot runner casting system, a gate of a plastic product is flanged, pressure of a pressure cylinder is insufficient to offset injection pressure inside the mold core, and the gate is raised, and solves the problem that impact abrasion is generated on the gate of the mold core when the valve needle is pushed by the pressure cylinder to close the gate due to swing generated by plastic flowing impact.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a hot runner gating system, includes that mould benevolence runner opens the frame, the round hole has been seted up to the inside of mould benevolence runner opening frame, the inner wall that the frame was opened to mould benevolence runner is provided with the mouth cap, the inner wall of mouth cap is provided with sprue bush, the inside of mouth cap is provided with the locating hole that uses with sprue bush cooperation, sprue bush's inner wall is provided with the needle, contact between the frame is opened to needle and mould benevolence runner.
Preferably, the lower extreme of mould benevolence runner frame of opening is the bowl form and is opened the frame form, and the lower extreme of the frame form is opened to the bowl form personally submits the back taper, and the plastic solidifies in the space cooling of bowl form, can form natural sealing layer, and this sealing layer can prevent that remaining plastic from passing through the mouth cap and producing and revealing, and the plastic solidifies in the space cooling of bowl form, can form natural insulating layer, and this insulating layer can prevent thermal continuation to scatter and disappear and then guarantee that inside plastic keeps in the molten state, and this back taper possesses the effect of self-centering, can assist the needle and slide in the straight body runner.
Preferably, a flow guide hole is formed in the sprue bushing, a guide hole is formed in the sprue bushing, the flow guide hole always guides the valve needle in the process of moving the valve needle for sealing glue, and the guide hole can offset valve needle deflection caused by plastic flowing.
Preferably, the valve needle is provided with material returning grooves at equal intervals, the material returning grooves are arranged on the valve needle in an array manner, and the material returning grooves allow most of plastic to return into the sprue bushing in the process that the valve needle moves to close the mold core sprue.
Preferably, the head of the valve needle is designed into a circular arc transition form, and the head of the valve needle is a smooth fillet, so that the valve needle is prevented from being damaged by impact of swinging generated by plastic flowing on a mold core sprue.
Compared with the prior art, the invention has the following beneficial effects:
the invention simplifies the processing and manufacturing precision of each part of the hot runner system, improves the reliability of the sprue seal, prolongs the service life of the sprue and reduces the time of shutdown maintenance by matching the structures of the mold core sprue opening frame, the nozzle cap, the sprue bushing, the valve needle and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the mold core gate frame of the present invention;
FIG. 3 is a schematic view of the overall structure of the nozzle cap of the present invention;
FIG. 4 is a schematic view of the overall construction of the sprue bushing of the present invention;
fig. 5 is a schematic view of the overall structure of the valve needle of the present invention.
In the figure: 1. opening a mold core pouring gate; 11. a circular hole; 2. a mouth cap; 21. positioning holes; 3. a sprue bushing; 31. a flow guide hole; 32. a guide hole; 4. a valve needle; 41. a feed back trough.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a hot runner casting system includes a mold core gate opening frame 1, a circular hole 11 is formed in the mold core gate opening frame 1, a nozzle cap 2 is disposed on an inner wall of the mold core gate opening frame 1, a gate bushing 3 is disposed on an inner wall of the nozzle cap 2, a positioning hole 21 used in cooperation with the gate bushing 3 is disposed in the nozzle cap 2, a valve needle 4 is disposed on an inner wall of the gate bushing 3, the valve needle 4 contacts with the mold core gate opening frame 1, a lower end of the mold core gate opening frame 1 is in a bowl-shaped opening frame shape, and a lower end of the bowl-shaped opening frame shape is an inverted cone surface, and plastic cools and solidifies in the bowl-shaped space to form a natural sealing layer which can prevent leakage of other plastic through the nozzle cap 2, and can cool and solidify in the bowl-shaped space to form a natural thermal insulation layer which can prevent continuous dissipation of heat and further ensure that the internal plastic remains in a molten state, the inverted conical surface has the function of automatic centering, can assist the valve needle 4 to slide into the straight body pouring gate,
referring to fig. 1 and 4, the sprue bushing 3 is provided with a guiding hole 31 inside, the sprue bushing 3 is provided with a guiding hole 32 inside, the guiding hole 31 guides the valve pin 4 all the way during the movement of the valve pin 4 and the guiding hole 32 offsets the deflection of the valve pin 4 caused by the plastic flow,
referring to fig. 1 and 5, the valve needle 4 is provided with material returning grooves 41 at equal intervals inside, the material returning grooves 41 are arranged on the valve needle 4 in an array manner, the material returning grooves 41 allow most of plastic to return into the gate bushing 3 in the process that the valve needle 4 moves to close the mold core gate, the head of the valve needle 4 is designed in an arc transition manner, and the head of the valve needle 4 is a smooth round corner, so that impact damage of the valve needle 4 to the mold core gate due to swinging generated by plastic flowing is avoided.
The specific implementation process of the invention is as follows: when the hot runner pouring system needs to be used, the mold core pouring gate is matched with structures such as the mold core pouring gate opening frame 1, the nozzle cap 2, the pouring gate lining 3 and the valve needle 4 for use, the machining and manufacturing precision of parts of the hot runner system is finally simplified, the reliability of pouring gate sealing is improved, the service life of the pouring gate is prolonged, the valve needle 4 can be matched to generate a sealing glue effect, the valve needle 4 can be guided to move along an ideal axis under the action of the positioning hole 21, the problem of impact abrasion of the pouring gate is solved, the valve needle 4 is always guided in the process of moving the sealing glue of the valve needle 4 under the action of the guide hole 31 and the guide hole 32, the valve needle 4 is offset from deflection caused by plastic flowing, and most of plastic is allowed to return into the pouring gate lining 3 in the process of moving and closing the mold core pouring gate by the valve needle 4 under the action of the material return groove 41.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a hot runner gating system, includes mould benevolence runner and opens frame (1), its characterized in that: round hole (11) have been seted up to the inside of mould benevolence runner frame (1), the inner wall of mould benevolence runner frame (1) is opened is provided with mouth cap (2), the inner wall of mouth cap (2) is provided with sprue bush (3), the inside of mouth cap (2) is provided with locating hole (21) that use with sprue bush (3) cooperation, the inner wall of sprue bush (3) is provided with needle (4), contact between needle (4) and the mould benevolence runner frame (1).
2. A hot runner gating system according to claim 1, wherein: the lower end surface of the mold core sprue opening frame (1) is in a bowl-shaped opening frame shape, and the lower end surface of the bowl-shaped opening frame shape is in an inverted conical surface.
3. A hot runner gating system according to claim 1, wherein: a flow guide hole (31) is formed in the sprue bushing (3), and a guide hole (32) is formed in the sprue bushing (3).
4. A hot runner gating system according to claim 1, wherein: the inside equidistance of needle (4) has seted up feed back groove (41), and feed back groove (41) be array arrangement on needle (4).
5. A hot runner gating system according to claim 1, wherein: the head part of the valve needle (4) is designed into a circular arc transition form, and the head part of the valve needle (4) is a smooth fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220356714.6U CN217434912U (en) | 2022-02-22 | 2022-02-22 | Hot runner gating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220356714.6U CN217434912U (en) | 2022-02-22 | 2022-02-22 | Hot runner gating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217434912U true CN217434912U (en) | 2022-09-16 |
Family
ID=83214035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220356714.6U Active CN217434912U (en) | 2022-02-22 | 2022-02-22 | Hot runner gating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217434912U (en) |
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2022
- 2022-02-22 CN CN202220356714.6U patent/CN217434912U/en active Active
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