CN212072803U - Adjustable cylinder for hot runner - Google Patents
Adjustable cylinder for hot runner Download PDFInfo
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- CN212072803U CN212072803U CN202020548475.5U CN202020548475U CN212072803U CN 212072803 U CN212072803 U CN 212072803U CN 202020548475 U CN202020548475 U CN 202020548475U CN 212072803 U CN212072803 U CN 212072803U
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- piston rod
- piston
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- screw
- adjustable cylinder
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Abstract
The utility model discloses an adjustable cylinder for hot runner, be in including cylinder body, setting piston in the cylinder body, with the piston rod that the piston is connected and with the needle that the piston rod is connected, its characterized in that: the middle part of the piston is provided with a central hole A which vertically penetrates through the piston; one part of the central hole A is a threaded hole; the piston rod is arranged in the central hole A, the piston rod is provided with an external thread matched with the thread hole in a threaded manner, a sealing ring A is arranged between the piston rod and the central hole A, and a sealing ring B is arranged between the piston rod and the cylinder body. The utility model discloses a threaded connection of piston rod and piston makes the upper and lower position of the relative piston of piston rod adjustable to adjust the upper and lower position of the relative piston of needle, avoid the needle short lead to the needle to seal the technical problem who does not live gluey or the bad mould benevolence in needle overlength top.
Description
Technical Field
The utility model belongs to the technical field of the hot runner, concretely relates to adjustable cylinder is used to hot runner.
Background
At present, glue outlets of injection molds adopting hot runners are opened and closed by adopting valve needles; the sliding of the valve needle may be controlled by a cylinder or a spring. In the prior art, in a structure that a cylinder is used for controlling the valve needle to move up and down, the upper position and the lower position of the valve needle relative to a cylinder piston cannot be adjusted, and due to the fact that the length of the valve needle has machining errors, the technical problem that the valve needle cannot be sealed by glue or the valve needle is too long to jack up a die core can be solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the position of prior art needle in the cylinder can not be adjusted and lead to sealing glue or top bad mould benevolence, the utility model aims to provide an adjustable cylinder for hot runner. The utility model discloses a threaded connection of piston rod and piston makes the upper and lower position of the relative piston of piston rod adjustable to adjust the upper and lower position of the relative piston of needle, avoid the needle short lead to the needle to seal the technical problem who does not live gluey or the bad mould benevolence in needle overlength top.
The utility model discloses the technical scheme who adopts does:
the adjustable cylinder for the hot runner comprises a cylinder body, a piston arranged in the cylinder body, a piston rod connected with the piston and a valve needle connected with the piston rod, wherein the middle part of the piston is provided with a central hole A which vertically penetrates through the piston; one part of the central hole A is a threaded hole; the piston rod is arranged in the central hole A, the piston rod is provided with an external thread matched with the thread hole in a threaded manner, a sealing ring A is arranged between the piston rod and the central hole A, and a sealing ring B is arranged between the piston rod and the cylinder body.
As a further alternative of the adjustable cylinder for the hot runner, a locking structure is provided between the piston and the piston rod to prevent the piston rod from loosening relative to the piston.
As a further alternative to the adjustable cylinder for the hot runner, the locking structure includes a flange integrally formed with the piston rod; the flange is positioned above the piston, and a through screw hole is formed in the upper end face of the flange; and a screw is connected in the screw hole in an internal thread manner.
As a further alternative of the adjustable cylinder for the hot runner, the screw hole is provided in plurality, and a screw is threadedly connected in each screw hole.
As a further alternative to the adjustable cylinder for a hot runner, a plurality of the screw holes are symmetrically distributed with respect to the center of the flange.
As a further alternative to the adjustable cylinder for the hot runner, the valve needle is detachably connected to the piston rod.
As a further alternative of the adjustable air cylinder for the hot runner, a central hole B which vertically penetrates through is formed in the middle of the piston rod; the central hole B comprises a screw hole and a stepped hole which are connected in sequence from top to bottom; the stepped hole is large at the top and small at the bottom; one end of the valve needle is matched with the stepped hole, and the other end of the valve needle extends out of the piston rod downwards; the screw hole is in threaded connection with a screw plug; a sealing block is arranged between the screw plug and the valve needle; and two ends of the sealing block are respectively abutted against the bottom end of the screw plug and the top end of the valve needle.
As a further alternative of the adjustable cylinder for the hot runner, a sealing ring C is arranged between the sealing block and the central hole B.
As a further alternative of the adjustable cylinder for the hot runner, a screw hole is formed in the top end face of the sealing block.
As a further alternative to the adjustable cylinder for the hot runner, the flange has a wrench portion that mates with a wrench.
The utility model has the advantages that:
the utility model has the advantages that the upper and lower positions of the piston rod relative to the piston can be adjusted through the threaded connection of the piston rod and the piston, so that the upper and lower positions of the valve needle relative to the piston can be adjusted, and the technical problems that the valve needle cannot seal glue or the valve needle is too long and the mold core is damaged due to too short valve needle are avoided; secondly, the locking structure is arranged between the piston and the piston rod, so that the threaded connection between the piston and the piston rod is not easy to loosen, and the reliability is improved; and the back cover of the cylinder body is removed, the piston rod can be rotated to adjust the upper position and the lower position of the valve needle, the adjustment is convenient, and the adjustment time is short.
Other advantageous effects of the present invention will be described in detail in the detailed description of the invention.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the description of the embodiments will be briefly introduced below, it should be understood that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of an adjustable cylinder for hot runners according to the present invention;
FIG. 2 is a schematic view of the piston of the adjustable cylinder for the hot runner of FIG. 1;
fig. 3 is a schematic structural view of a piston rod in the adjustable cylinder for a hot runner shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. It is to be understood that the drawings are designed solely for the purposes of illustration and description and not as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In this specification, the "up", "down", "top", "vertical" and the like refer to the orientation of the adjustable cylinder for hot runner in fig. 1.
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the adjustable cylinder for hot runners according to the present embodiment includes a cylinder body 3, a piston 1 provided in the cylinder body 3, a piston rod 2 connected to the piston 1, and a needle 8 connected to the piston rod 2. The specific structure of the cylinder 3 and the piston 1 is well known in the art, and for this reason, only the operation process will be briefly described, and as shown in fig. 1, the cylinder 3 includes a hollow cylinder 32 having an opening at the top end thereof, and a rear cover 31 covering the opening of the cylinder 32, and the rear cover 31 is detachably connected to the cylinder 32 to be able to mount parts such as the piston 1, etc. in the hollow portion of the cylinder 32. The hollow portion of the cylinder tube 32 is a working chamber, and the piston 1 divides the working chamber into two parts, an upper working chamber and a lower working chamber. As shown in fig. 1, the rear cover 31 is provided with an air inlet a322 communicated with the upper working chamber, the cylinder 32 is provided with an air inlet B321 communicated with the lower working chamber, the pressure air enters the upper working chamber through the air inlet a322, the pressure air in the lower working chamber is discharged through the air inlet B321, and the piston 1 moves downward, so as to push the valve needle 8 to close the glue outlet 11; the pressure air enters the lower working chamber through the air inlet hole A321, the pressure air in the upper working chamber is discharged through the air inlet hole A322, the piston 1 moves upwards, and the valve needle 8 is pushed to open the glue outlet 11.
As shown in fig. 1 and 2, the middle part of the piston 1 is provided with a central hole a11 which vertically penetrates through; a part of the central hole A11 is a threaded hole; the piston rod 2 is arranged in the central hole A11, the piston rod 2 is provided with an external thread matched with the thread hole in a threaded manner, a sealing ring A5 is arranged between the piston rod 2 and the central hole A11, and a sealing ring B4 is arranged between the piston rod 2 and the cylinder body 3. The piston rod 2 is rotated, the relative position of the piston rod 2 and the piston 1 in the vertical direction changes under the action of the threads, and the valve needle 8 is connected with the piston rod 2, so that the purpose of adjusting the vertical position of the valve needle 8 can be achieved. During adjustment, the rear cover 31 is opened, and after adjustment is completed, the rear cover 31 is locked, so that adjustment is very convenient.
In order to avoid the loosening of the threaded connection between the piston rod 2 and the piston 1, in the present embodiment, a locking structure is provided between the piston 1 and the piston rod 2. The locking structure can be realized by adopting the prior art such as a welding structure or a bolt structure. As shown in fig. 1 and 3, in the present embodiment, the locking structure includes a flange 21 formed integrally with the piston rod 2; the flange 21 is positioned above the piston 1, and the upper end surface of the flange 21 starts to be provided with a through screw hole 211; a screw 9 is screwed into the screw hole 211. Utilize the vertical force that screw 9 produced, increased the frictional force between the screw thread of screw and the screw thread of screw hole 211 and between the screw thread of piston rod 2 and the screw thread of piston 1, reach the effect that threaded connection between avoiding piston rod 2 relative piston 1 is not hard up.
In the present embodiment, as shown in fig. 3, a plurality of screw holes 211 are provided, and a screw 9 is threadedly coupled to each of the screw holes 211, thereby greatly increasing the effect of frictional force between the thread of the piston rod 2 and the thread of the piston 1.
In this embodiment, as shown in fig. 3, the plurality of screw holes 211 are symmetrically distributed with respect to the center of the flange 21, so that the axial force generated by the plurality of screws 9 is symmetrical with respect to the center of the flange 21, and the flange 21 is prevented from being affected by a moment, which may cause the piston rod 2 to be skewed and even to be locked with the piston 1.
In this embodiment, the flange 21 has a wrench portion 23 that engages with a wrench, as shown in fig. 3, to facilitate rotation of the piston rod 2. The wrench portion 23 may be a plurality of insertion holes formed in the top end surface of the flange 21 or the outer peripheral wall of the flange, or the outer peripheral wall of the flange 21 may be a polygonal surface, and in this embodiment, as shown in fig. 3, the outer peripheral wall of the flange 21 is a regular hexagon.
In this embodiment, as shown in fig. 1, the valve needle 8 is detachably connected to the piston rod 2, so that the replacement of the valve needle 8 can be facilitated.
As shown in fig. 1, in the present embodiment, a central hole B22 passing through vertically is formed in the middle of the piston rod 2; the center hole B22 includes a screw hole 221 and a stepped hole 222 connected in series from top to bottom; the stepped hole 222 is large at the top and small at the bottom; one end of the valve needle 8 is matched with the stepped hole 222, and the other end of the valve needle 8 extends downwards to form the piston rod 2; the screw hole 221 is in threaded connection with a screw plug 10; a sealing block 7 is arranged between the screw plug 10 and the valve needle 8; the two ends of the sealing block 7 respectively abut against the bottom end of the screw plug 10 and the top end of the valve needle 8. Thus, the valve needle 8 can be removed from the outside of the injection mold, and specifically, the rear cover 31, the plug screw 10, and the seal block 7 are removed in order, so that the valve needle 8 can be taken out, the time for replacing the valve needle 8 is greatly saved, and the maintenance efficiency is improved.
As shown in fig. 1, in the present embodiment, a sealing ring C6 is disposed between the sealing block 7 and the central hole B22, so as to prevent the leakage of the pressurized air to the glue outlet.
As shown in fig. 1, in this embodiment, the top end surface of the sealing block 7 is provided with a screw hole, so that when the sealing block 7 is taken out, the sealing block 7 can be taken out by screwing the bolt into the screw hole and pulling the bolt upwards, thereby avoiding the problem that the sealing block 7 is not convenient to take out without a handheld part.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (10)
1. Adjustable cylinder for hot runner, including the cylinder body, set up in piston in the cylinder body, with piston rod that the piston is connected and with the needle that the piston rod is connected, its characterized in that: the middle part of the piston is provided with a central hole A which vertically penetrates through the piston; one part of the central hole A is a threaded hole; the piston rod is arranged in the central hole A, the piston rod is provided with an external thread matched with the thread hole in a threaded manner, a sealing ring A is arranged between the piston rod and the central hole A, and a sealing ring B is arranged between the piston rod and the cylinder body.
2. The adjustable cylinder for hot runners according to claim 1, wherein: and a locking structure is arranged between the piston and the piston rod so as to prevent the piston rod from loosening relative to the piston.
3. The adjustable cylinder for hot runners according to claim 2, wherein: the locking structure comprises a flange which is integrally formed with the piston rod; the flange is positioned above the piston, and a through screw hole is formed in the upper end face of the flange; and a screw is connected in the screw hole in an internal thread manner.
4. The adjustable cylinder for hot runners according to claim 3, wherein: the screw hole is provided with a plurality of, every equal threaded connection has the screw in the screw hole.
5. The adjustable cylinder for hot runners according to claim 4, wherein: the plurality of screw holes are symmetrically distributed relative to the center of the flange.
6. The adjustable cylinder for hot runners according to claim 1, wherein: the valve needle is detachably connected with the piston rod.
7. The adjustable cylinder for hot runners according to claim 6, wherein: the middle part of the piston rod is provided with a center hole B which vertically penetrates through the piston rod; the central hole B comprises a screw hole and a stepped hole which are connected in sequence from top to bottom; the stepped hole is large at the top and small at the bottom; one end of the valve needle is matched with the stepped hole, and the other end of the valve needle extends out of the piston rod downwards; the screw hole is in threaded connection with a screw plug; a sealing block is arranged between the screw plug and the valve needle; and two ends of the sealing block are respectively abutted against the bottom end of the screw plug and the top end of the valve needle.
8. The adjustable cylinder for hot runners according to claim 7, wherein: and a sealing ring C is arranged between the sealing block and the central hole B.
9. The adjustable cylinder for hot runners according to claim 8, wherein: the top end face of the sealing block is provided with a screw hole.
10. The adjustable cylinder for hot runners according to claim 3, wherein: the flange has a wrench portion that mates with a wrench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020548475.5U CN212072803U (en) | 2020-04-14 | 2020-04-14 | Adjustable cylinder for hot runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020548475.5U CN212072803U (en) | 2020-04-14 | 2020-04-14 | Adjustable cylinder for hot runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212072803U true CN212072803U (en) | 2020-12-04 |
Family
ID=73593992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020548475.5U Active CN212072803U (en) | 2020-04-14 | 2020-04-14 | Adjustable cylinder for hot runner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212072803U (en) |
-
2020
- 2020-04-14 CN CN202020548475.5U patent/CN212072803U/en active Active
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