CN216267382U - Cylinder for needle valve type hot runner system and needle valve type hot runner system - Google Patents
Cylinder for needle valve type hot runner system and needle valve type hot runner system Download PDFInfo
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- CN216267382U CN216267382U CN202122891361.8U CN202122891361U CN216267382U CN 216267382 U CN216267382 U CN 216267382U CN 202122891361 U CN202122891361 U CN 202122891361U CN 216267382 U CN216267382 U CN 216267382U
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Abstract
The utility model discloses a cylinder for a needle valve type hot runner system and a needle valve type runner system, wherein the cylinder comprises a cylinder body; the cooling plate is tightly attached to the driving end of the cylinder body, one end of the cooling plate, which is back to the cylinder body, is fixedly connected with the hot runner plate, a circulating cooling runner is arranged in the cooling plate, and a medium inlet and a medium outlet which are communicated with the circulating cooling runner are formed in the cooling plate; the valve needle assembly comprises a valve needle guide sleeve, wherein one end of the valve needle guide sleeve is connected with the driving end of the cylinder body, the other end of the valve needle guide sleeve extends into the valve needle inside the nozzle, the valve needle guide sleeve is arranged on the valve needle, the valve needle guide sleeve is arranged between the cooling plate and the hot runner plate and is attached to the cooling plate, and the nozzle and the cylinder body are oppositely arranged at two ends of the hot runner plate. The cylinder can be directly fixed on the hot runner plate, and the air cooling plate is designed on the cylinder and used for cooling the cylinder body and the valve needle guide sleeve, so that a sealing ring of the cylinder is protected, and material leakage at the valve needle guide sleeve is prevented.
Description
Technical Field
The utility model relates to the technical field of injection molding equipment, in particular to an air cylinder for a needle valve type hot runner system and the needle valve type hot runner system with the air cylinder.
Background
The structure of the hot runner system may vary widely depending on the type and properties of plastic, the shape and structural type of plastic product, and the like, but the basic structure is uniform. The needle valve type hot runner system mainly comprises a flow distribution plate, a main inlet nozzle, a valve needle driver and other parts. The valve needle driver generally comprises an oil cylinder, an air cylinder and the like. The cylinder is an important part of a needle valve type hot runner system, and drives the valve needle to move so as to control the opening and closing of the pouring gate.
The existing cylinder is fixed on a hot runner flow distribution plate, and because the temperature of the hot runner plate is very high, a cooling water plate is needed to cool the cylinder, otherwise, a sealing ring of the cylinder is very easy to damage. There are problems with this type of cylinder: 1. a mold temperature controller is required to be arranged for the air cylinder, and cooling water is introduced into the air cylinder; 2. if the cooling water has impurities, the cooling water plate of the cylinder is easily blocked, so that the heat dissipation of the cylinder is poor, and a sealing ring of the cylinder is damaged.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems, the present invention aims to: the cylinder can be directly fixed on a hot runner plate, and the cylinder is provided with an air cooling plate for cooling a cylinder body and a valve needle guide sleeve, so that a sealing ring of the cylinder is protected and material leakage at the valve needle guide sleeve is prevented.
The technical scheme of the utility model is as follows:
one of the objects of the present invention is to provide a cylinder for a needle valve type hot runner system, comprising:
a cylinder body;
the cooling plate is tightly attached to the driving end of the cylinder body, one end of the cooling plate, which is back to the cylinder body, is fixedly connected with the hot runner plate, a circulating cooling runner is arranged in the cooling plate, and a medium inlet and a medium outlet which are communicated with the circulating cooling runner are formed in the cooling plate;
the valve needle assembly comprises a valve needle guide sleeve, wherein one end of the valve needle guide sleeve is connected with the driving end of the cylinder body, the other end of the valve needle guide sleeve extends into the valve needle inside the nozzle, the valve needle guide sleeve is arranged on the valve needle, the valve needle guide sleeve is arranged between the cooling plate and the hot runner plate and is attached to the cooling plate, and the nozzle and the cylinder body are oppositely arranged at two ends of the hot runner plate.
Optionally, the medium is air, and the cylinder further includes:
the air inlet pipe is connected with the medium inlet;
an exhaust pipe connected to the outlet.
Optionally, a flow limiting valve is further arranged on the air inlet pipe; and/or
And a silencer is also arranged on the exhaust pipe.
Optionally, the cylinder further includes:
the fixing support is arranged at one end, back to the cylinder body, of the cooling plate, the valve needle guide sleeve is suitable for being arranged in the fixing support in a penetrating mode, one end of the valve needle guide sleeve is embedded in the cooling plate, and the other end of the valve needle guide sleeve is embedded in the hot runner plate;
and the cylinder body and the cooling plate are fixedly connected with the hot runner plate through the fastening piece.
Optionally, a through hole for the valve needle to penetrate is formed in the cooling plate, and the valve needle guide sleeve is embedded into the through hole and is attached to the through hole and the valve needle guide sleeve.
Optionally, a groove recessed towards a direction away from the fixing support is formed in the hot runner plate, and the valve needle guide sleeve is suitable for being embedded into the groove.
Optionally, the fastener is a screw.
It is another object of the present invention to provide a needle valve hot runner system including the cylinder of any one of the above.
Compared with the prior art, the utility model has the advantages that:
the cylinder for the needle valve type hot runner system can be directly fixed on the hot runner plate, and is provided with the air cooling plate for cooling the cylinder body and the valve needle guide sleeve, so that a sealing ring of the cylinder is protected and material leakage at the valve needle guide sleeve is prevented.
Drawings
The utility model is further described with reference to the following figures and examples:
fig. 1 is a schematic perspective view of a cylinder for a needle valve type hot runner system according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a cylinder for a needle valve hot runner system according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view illustrating a cylinder for a needle valve type hot runner system according to an embodiment of the present invention.
Wherein: 1. a hot runner plate; 2. a valve needle guide sleeve; 3. fixing a bracket; 4. a cooling plate; 5. a cylinder body; 6. a valve needle; 7. a nozzle; 8. a muffler; 9. a flow-limiting valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1 to 3, a cylinder for a needle valve type hot runner system of the present embodiment includes a cylinder body 5, a cooling plate 4, a needle 6 assembly, a fixing bracket 3, an intake pipe, an exhaust pipe, a flow restriction valve 9, and a muffler 8. Wherein the drive end of cylinder body 5 is fixed with 4 laminating of cooling plate, and the inside circulative cooling runner that is equipped with of cooling plate 4 is seted up on cooling plate 4 and is communicated with the medium entry and the export of circulative cooling runner, is connected with the intake pipe on the medium entry, is connected with the blast pipe on the medium export, installs restriction valve 9 on the intake pipe, installs muffler 8 on the blast pipe. The fixing bracket 3 is provided with a fastener, preferably a screw in this embodiment, on one end of the cooling plate 4 facing away from the cylinder body 5, i.e., the lower end of the cooling plate 4 shown in fig. 3, and one end of the fixing bracket 3 facing away from the cooling plate 4, i.e., the lower end of the fixing bracket 3 shown in fig. 3, and the cylinder body 5 and the cooling plate 4 are fixed on the hot runner plate 1 by the fastener. One end of the valve needle 6, specifically, the upper end of the valve needle 6 shown in fig. 3, is fixed at the driving end of the cylinder body 5, and the other end, that is, the lower end of the valve needle 6 shown in fig. 3, penetrates through the cooling plate 4, the fixing bracket 3 and the hot runner plate 1 and is arranged in the nozzle 7 fixed at the other end of the hot runner plate 1, that is, the lower end of the hot runner plate 1 shown in fig. 3. The valve needle guide sleeve 2 is sleeved on the valve needle 6, one end of the valve needle guide sleeve 2, namely the upper end of the valve needle guide sleeve 2 shown in fig. 3, is embedded into the cooling plate 4, and the other end of the valve needle guide sleeve 2, namely the lower end of the valve needle guide sleeve 2 shown in fig. 3, is embedded and fixed in the hot runner plate 1. More specifically, a through hole for the valve needle 6 to penetrate is formed in the cooling plate 4, the upper end of the valve needle guide sleeve 2 is embedded in the through hole, and the outer wall of the upper end of the valve needle guide sleeve 2 is attached to the inner wall of the through hole. The upper end of the hot runner plate 1 is provided with a groove which is sunken downwards, and the lower end of the valve needle guide sleeve 2 is embedded and fixed in the groove. The heat of the valve needle guide sleeve 2 is conducted to the cooling plate 4, so that the valve needle guide sleeve 2 is cooled by heat dissipation, and molten plastic is prevented from overflowing from a gap between the valve needle guide sleeve 2 and the valve needle 6. It should be noted that, in the present embodiment, the fixing bracket 3 is made of a low thermal conductive material (not specifically limited and described) known to those skilled in the art, and has a low thermal conductivity, so that heat conduction from the hot runner plate 1 to the cylinder body 5 is reduced, and the cylinder seal ring is effectively protected.
The cylinder of this embodiment is through with cylinder body 5 snap-on hot runner plate 1 for hot runner system cylinder can preinstall on hot runner plate 1 when shipment, need not install the cylinder at customer's mould scene, reduces after-sales engineer's work load. The cylinder is cooled by the cooling plate 4, the working air source of the cylinder can be directly used for cooling the cylinder, the conventional cooling water plate is replaced by cooling water, and a mold temperature machine for introducing cooling water is omitted.
The specific structure and operation principle of the flow limiting valve 9 are not described and limited in detail, and the flow limiting valve 9 is conventional in the prior art. The specific structure and operation of the muffler 8 will not be described or limited in detail herein, and is an existing conventional muffler 8.
For the cooling plate 4, the air cooling plate 4 is preferably adopted in the embodiment, the working air source of the cylinder can be directly used as a cooling medium to cool the cylinder, a mold temperature machine required by conventional water cooling is omitted, and the structure is simpler. As an alternative embodiment, the cooling plate 4 may also be a coolant cooling plate 4 or a water-cooled cooling plate 4. The specific structure of the circulating cooling channel is not described or limited in detail, such as a serpentine channel or a spiral channel or a U-shaped channel or a labyrinth channel.
As an alternative embodiment, the present embodiment may be provided without the flow restriction valve 9 and the muffler 8.
The embodiment also provides a needle valve type hot runner system, which comprises the cylinder of the embodiment. Because have the cylinder of above-mentioned embodiment, consequently have the beneficial effect of above-mentioned cylinder at least, specifically no longer describe. Other structures of the needle valve type hot runner system are not described or limited in detail herein, and are conventional structures.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. A cylinder for a needle valve hot runner system, comprising:
a cylinder body (5);
the cooling plate (4) is tightly attached to the driving end of the cylinder body (5), one end of the cooling plate, which faces away from the cylinder body (5), is fixedly connected with the hot runner plate (1), a circulating cooling runner is arranged in the cooling plate (4), and a medium inlet and a medium outlet which are communicated with the circulating cooling runner are formed in the cooling plate (4);
valve needle (6) subassembly, including one end with the drive end of cylinder body (5) is connected, the other end stretches into inside valve needle (6) of nozzle (7) and the cover establish valve needle guide pin bushing (2) on valve needle (6), valve needle guide pin bushing (2) are located cooling plate (4) with between hot runner plate (1) and with cooling plate (4) laminating, nozzle (7) with cylinder body (5) set up relatively the both ends of hot runner plate (1).
2. The cylinder for a needle valve hot runner system according to claim 1, wherein the medium is air, the cylinder further comprising:
the air inlet pipe is connected with the medium inlet;
an exhaust pipe connected to the outlet.
3. The cylinder for a needle valve hot runner system according to claim 2, further comprising a flow restriction valve (9) provided on the inlet pipe; and/or
And a silencer (8) is also arranged on the exhaust pipe.
4. The cylinder for a needle valve hot runner system according to claim 1, further comprising:
the fixing support (3) is arranged at one end, back to the cylinder body (5), of the cooling plate (4), the valve needle guide sleeve (2) is suitable for being arranged in the fixing support (3) in a penetrating mode, one end of the valve needle guide sleeve is embedded in the cooling plate (4), and the other end of the valve needle guide sleeve is embedded in the hot runner plate (1);
the cylinder body (5) and the cooling plate (4) are fixedly connected with the hot runner plate (1) through the fasteners.
5. The cylinder of claim 4, wherein the cooling plate has a through hole for the valve needle to pass through, and the valve needle guide sleeve is embedded in the through hole and attached to the through hole.
6. The cylinder for the needle valve type hot runner system according to claim 4, wherein the hot runner plate is formed with a groove recessed toward a direction away from the fixing bracket, and the needle guide is adapted to be inserted into the groove.
7. The cylinder for a needle valve hot runner system according to claim 4, wherein the fastener is a screw.
8. A needle valve hot runner system comprising a cylinder according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122891361.8U CN216267382U (en) | 2021-11-24 | 2021-11-24 | Cylinder for needle valve type hot runner system and needle valve type hot runner system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122891361.8U CN216267382U (en) | 2021-11-24 | 2021-11-24 | Cylinder for needle valve type hot runner system and needle valve type hot runner system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216267382U true CN216267382U (en) | 2022-04-12 |
Family
ID=81037369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122891361.8U Active CN216267382U (en) | 2021-11-24 | 2021-11-24 | Cylinder for needle valve type hot runner system and needle valve type hot runner system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216267382U (en) |
-
2021
- 2021-11-24 CN CN202122891361.8U patent/CN216267382U/en active Active
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