A hot runner cylinder with cooling function

Abstract

The utility model relates to the technical field of hot runner cylinders, and discloses a hot runner cylinder with a cooling function, including a cylinder valve seat, a valve needle is arranged below the cylinder valve seat, the top of the valve needle extends to the inside of the cylinder valve seat, and a mounting device is arranged below the cylinder valve seat, and the mounting device includes a sealing portion. The hot runner cylinder with a cooling function is provided with an adjusting sleeve, a fixing sleeve, a locking collar, a clamping ring, a second sealing gasket, a clamping block and a limiting plate, and the second sealing gasket is used to seal the connection between the valve needle and the cylinder valve seat, and the clamping ring and the clamping block are used to facilitate positioning of the second sealing gasket. After a period of use, the gap between the inner wall of the second sealing gasket and the valve needle becomes larger, and the adjusting sleeve is rotated, and the adjusting sleeve drives the limiting plate to move upward, and the limiting plate squeezes the outer surface of the locking collar to reduce the gap between the inner wall of the second sealing gasket and the valve needle, thereby increasing the use time of the device, reducing the maintenance frequency, and increasing the service life of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of hot runner cylinders, in particular to a hot runner cylinder with a cooling function. Background Art

[0002] Hot runner systems are divided into open hot runner systems and needle valve hot runner systems. According to the raw materials, appearance, and performance requirements of different products, the corresponding hot runner system that meets the requirements is selected, and the corresponding nozzle form is selected.

[0003] A Chinese patent discloses a hot runner cylinder structure, with the publication number CN216609886U, comprising a cylinder wall and a cavity, wherein the cylinder wall is provided with a cavity, wherein the cavity is provided with a movable cylinder, wherein a valve needle is fixedly connected to the movable cylinder, wherein the top of the cylinder wall is fixedly connected with an end cover, wherein a cooling cavity is provided inside the cylinder wall, and an air inlet is provided on one side of the cylinder wall. The hot runner cylinder structure is provided with an end cover, a groove, an insert, a bolt and a first sealing sleeve. Before use, the insert is inserted into the interior of the end cover, and after the threaded rod is fitted to the top of the end cover, a plurality of groups of bolts are rotated into the interior of the end cover through the groove to position the insert. At the same time, the first sealing sleeve inside the insert will be tightly attached to the outside of the valve needle, and the sealing between the valve needle and the insert is improved when the valve needle moves, thereby solving the problem that the sealing of the valve needle outlet is poor, which not only affects the overall thrust, but also causes external impurities to enter the cylinder body.

[0004] However, it still has the following disadvantages: the device uses the first sealing sleeve, the insert and the bolt, and uses the first sealing sleeve to squeeze and contact with the outer surface of the valve needle to improve the sealing of the device, but after the first sealing sleeve is worn, it must be directly disassembled and replaced, which affects the efficiency of the device. To this end, we propose a hot runner cylinder with a cooling function to solve this problem. Utility Model Content

[0005] The utility model aims to provide a hot runner cylinder with a cooling function to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: a hot runner cylinder with cooling function, comprising a cylinder valve seat, a valve needle is arranged below the cylinder valve seat, the top end of the valve needle extends to the inside of the cylinder valve seat, a mounting device is arranged below the cylinder valve seat, and the mounting device includes a sealing portion;

[0007] The sealing part includes a locking collar, an adjusting sleeve and a fixing sleeve, the top surface of the fixing sleeve is fixedly connected to the bottom surface of the cylinder valve seat, and the outer surface of the top end of the adjusting sleeve extends into the inside of the fixing sleeve and is threadedly connected to the inner wall of the fixing sleeve;

[0008] A mounting portion is provided inside the cylinder valve seat;

[0009] The mounting portion includes a valve cover and a gasket, the top surface of the cylinder valve seat is fixedly connected to the bottom surface of the gasket, a bolt is arranged above the valve cover, and the outer surface of the bottom end of the bolt is threadedly penetrated through the top surface of the valve cover and the top surface of the cylinder valve seat in sequence and extends to the inside of the cylinder valve seat.

[0010] A further improvement is that the sealing part also includes a retaining ring, a second sealing gasket, a retaining block and a limit plate, the inner wall of the second sealing gasket is sleeved on the outer surface of the valve needle, and the second sealing gasket is provided to seal between the valve needle and the cylinder valve seat.

[0011] A further improvement is that a ring groove and a clamping groove are provided on the outer surface of the second sealing gasket, the clamping ring is arranged inside the ring groove, the outer surface of the clamping ring is fixedly connected to the inner wall of the locking ring, the clamping block is arranged inside the clamping groove, the outer surface of the clamping block is fixedly connected to the inner wall of the locking ring, and by arranging the clamping ring and the clamping block, it is convenient to position the second sealing gasket to prevent the second sealing gasket from moving up and down and rotating when the valve needle moves up and down.

[0012] A further improvement is that the inner wall of the adjusting sleeve is fixedly connected to the outer surface of the limiting plate, and the inner wall of the limiting plate is in extrusion contact with the outer surface of the locking collar. By arranging the adjusting sleeve, the fixing sleeve and the limiting plate, the adjusting sleeve is rotated to move the limiting plate upward, so that the limiting plate squeezes the locking collar.

[0013] A further improvement is that the mounting portion further comprises a first sealing gasket, a piston, a filter, a liquid inlet pipe and a liquid outlet pipe, a cooling cavity is opened inside the cylinder valve seat, the outer surfaces of the liquid inlet pipe and the liquid outlet pipe are fixedly penetrated through the outer surface of the cylinder valve seat and are connected to the interior of the cooling cavity, and by arranging the liquid inlet pipe and the liquid outlet pipe, the coolant is facilitated to pass through the interior of the cylinder valve block to dissipate heat and cool the cylinder valve block.

[0014] A further improvement is that the bottom surface of the piston is fixedly connected to the top surface of the valve needle, a groove is provided on the outer surface of the piston, the first sealing gasket is arranged inside the groove, and the outer surface of the first sealing gasket is in extrusion contact with the inner wall of the cylinder valve seat. By setting the first sealing gasket, the sealing between the outer surface of the piston and the inner wall of the cylinder valve seat can be improved.

[0015] A further improvement is that a vent hole is provided on the front side of the cylinder valve seat, and the outer surface of the filter is fixedly connected to the inner wall of the vent hole. By providing the filter and the vent hole, the air pressure inside the cylinder valve block can be easily adjusted.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the hot runner cylinder with cooling function, by setting an adjusting sleeve, a fixing sleeve, a locking collar, a snap ring, a second sealing gasket, a clamping block and a limit plate, uses the second sealing gasket to seal the connection between the valve needle and the cylinder valve seat, uses the snap ring and the clamping block to facilitate positioning of the second sealing gasket, after a period of use, the gap between the inner wall of the second sealing gasket and the valve needle becomes larger, the adjusting sleeve is rotated, the adjusting sleeve drives the limit plate to move upward, the limit plate squeezes the outer surface of the locking collar, narrows the gap between the inner wall of the second sealing gasket and the valve needle, increases the use time of the device, reduces the maintenance frequency, and increases the service life of the device; by setting a first sealing gasket, a valve cover, a piston, a filter screen and a gasket, uses the first sealing gasket to improve the sealing between the piston and the inner wall of the cylinder valve seat; by setting a liquid inlet pipe and a liquid outlet pipe, coolant is introduced into the cylinder valve seat through the liquid inlet pipe, which is convenient for heat dissipation and cooling of the cylinder base. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a front cross-sectional view of the three-dimensional structure of the utility model;

[0019] Figure 3 It is a right side cross-sectional view of the three-dimensional structure of the utility model;

[0020] Figure 4 for Figure 3 A magnified view of the structure at center;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the locking collar of the utility model.

[0022] In the figure: 1 valve needle, 2 cylinder valve seat, 3 mounting device, 31 mounting part, 32 sealing part, 311 first sealing gasket, 312 valve cover, 313 piston, 315 filter screen, 316 gasket, 317 liquid inlet pipe, 318 liquid outlet pipe, 321 adjusting sleeve, 322 fixing sleeve, 323 locking collar, 324 clamping ring, 325 second sealing gasket, 326 clamping block, 327 limit plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5The utility model provides a technical solution: a hot runner cylinder with a cooling function, comprising a cylinder valve seat 2, a valve needle 1 is arranged below the cylinder valve seat 2, the top end of the valve needle extends to the inside of the cylinder valve seat 2, a mounting device 3 is arranged below the cylinder valve seat 2, the mounting device 3 comprises a sealing portion 32, the sealing portion 32 comprises a locking collar 323, an adjusting sleeve 321 and a fixing sleeve 322, the top surface of the fixing sleeve 322 is fixedly connected to the bottom surface of the cylinder valve seat 2, the outer surface of the top end of the adjusting sleeve 321 extends to the inside of the fixing sleeve 322 and is threadedly connected to the inner wall of the fixing sleeve 322;

[0025] The sealing portion 32 further includes a snap ring 324, a second sealing gasket 325, a clamping block 326 and a limit plate 327. The inner wall of the second sealing gasket 325 is sleeved on the outer surface of the valve needle 1. The outer surface of the second sealing gasket 325 is provided with an annular groove and a clamping groove. The snap ring 324 is arranged inside the annular groove. The outer surface of the snap ring 324 is fixedly connected to the inner wall of the locking collar 323. The clamping block 326 is arranged inside the clamping groove. The outer surface of the clamping block 326 is fixedly connected to the inner wall of the locking collar 323.

[0026] The inner wall of the adjusting sleeve 321 is fixedly connected to the outer surface of the limiting plate 327, and the inner wall of the limiting plate 327 is pressed and contacted with the outer surface of the locking collar 323. By setting the adjusting sleeve 321, the fixing sleeve 322, the locking collar 323, the snap ring 324, the second sealing gasket 325, the block 326 and the limiting plate 327, the second sealing gasket 325 is used to seal the connection between the valve needle 1 and the cylinder valve seat 2, and the snap ring 324 and the block 326 are used to facilitate the positioning of the second sealing gasket 325. After a period of use, the gap between the inner wall of the second sealing gasket 325 and the valve needle 1 becomes larger, and the adjusting sleeve 321 is rotated, and the adjusting sleeve 321 drives the limiting plate 327 to move upward, and the limiting plate 327 presses the outer surface of the locking collar 323 to reduce the gap between the inner wall of the second sealing gasket 325 and the valve needle 1, thereby increasing the use time of the device, reducing the maintenance frequency, and increasing the service life of the device.

[0027] A mounting portion 31 is provided inside the cylinder valve seat 2;

[0028] The mounting portion 31 includes a valve cover 312 and a gasket 316. The top surface of the cylinder valve seat 2 is fixedly connected to the bottom surface of the gasket 316. A bolt is arranged above the valve cover 312. The outer surface of the bottom end of the bolt is threadedly penetrated through the top surface of the valve cover 312 and the top surface of the cylinder valve seat 2 in sequence and extends to the inside of the cylinder valve seat 2. The mounting portion 31 also includes a first sealing gasket 311, a piston 313, a filter screen 315, a liquid inlet pipe 317 and a liquid outlet pipe 318. The bottom surface of the piston 313 is fixedly connected to the top surface of the valve needle 1. The outer surface of the piston 313 is provided with a groove. The first sealing gasket 311 is arranged inside the groove. The outer surface of the first sealing gasket 311 is in compression contact with the inner wall of the cylinder valve seat 2.

[0029] A vent hole is provided on the front of the cylinder valve seat 2, and the outer surface of the filter screen 315 is fixedly connected to the inner wall of the vent hole. The first sealing gasket 311, the valve cover 312, the piston 313, the filter screen 315 and the gasket 316 are provided, and the first sealing gasket 311 is used to improve the sealing performance between the piston 313 and the inner wall of the cylinder valve seat 2;

[0030] A cooling cavity is provided inside the cylinder valve seat 2, and the outer surfaces of the liquid inlet pipe 317 and the liquid outlet pipe 318 are fixedly passed through the outer surface of the cylinder valve seat 2 and are connected to the interior of the cooling cavity. By providing the liquid inlet pipe 317 and the liquid outlet pipe 318, coolant is introduced into the cylinder valve seat 2 through the liquid inlet pipe 317, thereby facilitating heat dissipation and cooling of the cylinder base 2.

[0031] When in use, after the device has been used for a period of time, the adjusting sleeve 321 is turned, and the adjusting sleeve 321 drives the limiting plate 327 to move relatively. The limiting plate 327 presses the outer surface of the locking ring 323 upwards, so that the inner wall of the locking ring 323 presses the second sealing gasket 325, thereby improving the air tightness between the outer surface of the valve needle 1 and the inner wall of the cylinder valve seat 2. The bolts are turned to remove the valve cover 312, and the piston 313 and the valve needle 1 can be removed upwards. At the same time, the first sealing gasket 311 and the second sealing gasket 325 can be replaced.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot runner cylinder with cooling function, comprising a cylinder valve seat (2), characterized in that: A valve needle (1) is arranged below the cylinder valve seat (2), the top end of the valve needle extends into the interior of the cylinder valve seat (2), and a mounting device (3) is arranged below the cylinder valve seat (2), the mounting device (3) comprising a sealing portion (32); The sealing portion (32) comprises a locking collar (323), an adjusting sleeve (321) and a fixing sleeve (322); the top surface of the fixing sleeve (322) is fixedly connected to the bottom surface of the cylinder valve seat (2); the top outer surface of the adjusting sleeve (321) extends into the interior of the fixing sleeve (322) and is threadedly connected to the inner wall of the fixing sleeve (322); A mounting portion (31) is provided inside the cylinder valve seat (2); The mounting portion (31) comprises a valve cover (312) and a gasket (316); the top surface of the cylinder valve seat (2) is fixedly connected to the bottom surface of the gasket (316); a bolt is arranged above the valve cover (312); the outer surface of the bottom end of the bolt is threadedly penetrated through the top surface of the valve cover (312) and the top surface of the cylinder valve seat (2) and extends into the interior of the cylinder valve seat (2).

2. A hot runner cylinder with cooling function according to claim 1, characterized in that: The sealing portion (32) further comprises a clamping ring (324), a second sealing gasket (325), a clamping block (326) and a limiting plate (327); the inner wall of the second sealing gasket (325) is sleeved on the outer surface of the valve needle (1).

3. A hot runner cylinder with cooling function according to claim 2, characterized in that: The outer surface of the second sealing gasket (325) is provided with an annular groove and a clamping groove, the clamping ring (324) is arranged inside the annular groove, the outer surface of the clamping ring (324) is fixedly connected to the inner wall of the locking collar (323), the clamping block (326) is arranged inside the clamping groove, and the outer surface of the clamping block (326) is fixedly connected to the inner wall of the locking collar (323).

4. The hot runner cylinder with cooling function according to claim 2, characterized in that: The inner wall of the adjustment sleeve (321) is fixedly connected to the outer surface of the limit plate (327), and the inner wall of the limit plate (327) is in compression contact with the outer surface of the locking collar (323).

5. The hot runner cylinder with cooling function according to claim 1, characterized in that: The mounting portion (31) further comprises a first sealing gasket (311), a piston (313), a filter screen (315), a liquid inlet pipe (317) and a liquid outlet pipe (318); a cooling cavity is provided inside the cylinder valve seat (2); and the outer surfaces of the liquid inlet pipe (317) and the liquid outlet pipe (318) are fixedly connected to the outer surface of the cylinder valve seat (2) and are connected to the interior of the cooling cavity.

6. A hot runner cylinder with cooling function according to claim 5, characterized in that: The bottom surface of the piston (313) is fixedly connected to the top surface of the valve needle (1); a groove is provided on the outer surface of the piston (313); the first sealing gasket (311) is arranged inside the groove; and the outer surface of the first sealing gasket (311) is in compression contact with the inner wall of the cylinder valve seat (2).

7. The hot runner cylinder with cooling function according to claim 5, characterized in that: A vent hole is provided on the front side of the cylinder valve seat (2), and the outer surface of the filter screen (315) is fixedly connected to the inner wall of the vent hole.

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