Hot runner cylinder with built-in fixing plug

Abstract

The utility model relates to a hot runner cylinder with a built-in fixing plug. The hot runner cylinder comprises a base, a cylinder body, a piston, a valve needle and a fixing assembly, the cylinder body is installed on the base, the piston is connected into the cylinder body in a sliding mode, and the valve needle is assembled on the piston through the fixing assembly. The fixing assembly comprises a fixing base, at least two clamping plates and a connecting plate. And the fixed seat is mounted in the center of the upper surface of the piston. According to the hot runner cylinder with the built-in fixing plug, the connecting plate at the bottom of the valve needle penetrates through the space between the two clamping plates and extends into the fixing base, then the valve needle is rotated to drive the connecting plate connected with the valve needle to rotate, so that the connecting plate rotates to the position below the two clamping plates, and it is ensured that the valve needle cannot be pulled out of the interior of the fixing base; and the connecting plate extends downwards to push the top plate to compress the spring, the top plate always keeps upward force through potential energy of the spring, and then it is ensured that the connecting plate is effectively attached to the lower surfaces of the two clamping plates.

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 built-in fixing plug. Background Art

[0002] Hot runner plays a very important role in production and molding. The hot runner system is a combination. It does not refer to a single product. It includes hot nozzles, runner plates, thermostats, manifolds, etc. These together constitute the hot runner system. The hot runner cylinder is a common component of the injection mold system.

[0003] Currently, when disassembling or fixing the valve needle of a hot runner cylinder, it is usually necessary to disassemble the entire cylinder, take out the piston inside the cylinder, and then install or remove the valve needle from the piston. However, the process of disassembling the entire cylinder and reassembling it takes a lot of time, which increases the downtime of the production line and reduces production efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hot runner cylinder with a built-in fixing plug, which has the advantages of solving the problem that the process of disassembling the entire cylinder and reassembling it takes a lot of time, resulting in increased downtime of the production line and reduced production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot runner cylinder with a built-in fixed plug, comprising a base, a cylinder body, a piston, a valve needle and a fixed assembly;

[0006] The cylinder body is mounted on the base, the piston is slidably connected inside the cylinder body, and the valve needle is assembled on the piston through a fixing assembly;

[0007] The fixing assembly includes a fixing seat, at least two clamping plates and a connecting plate;

[0008] The fixing seat is installed at the center of the upper surface of the piston, and the fixing seat has a cavity vertically opened, at least two clamping plates are arranged on the inner wall of the fixing seat at a front-to-back interval, and are located on the same horizontal line with the upper end surface of the fixing seat, and the connecting plate is assembled on the bottom end of the piston.

[0009] Furthermore, the length of the connecting plate in the X-axis direction is adapted to the diameter of the inner wall of the fixing seat.

[0010] Furthermore, the length of the connecting plate in the Y-axis direction is adapted to the spacing between the two card plates;

[0011] The shape of the connecting plate on the XY plane is a rectangle with convex left and right sides.

[0012] Furthermore, a sleeve is installed on the inner bottom wall of the fixing seat, and a push rod is slidably connected inside the sleeve. The upper end surface of the push rod is equipped with a top plate, and the top plate is located below at least two clamping plates. A spring is installed between the top plate and the inner bottom wall of the fixing seat.

[0013] Furthermore, the spring is sleeved on the outside of the sleeve and the push rod.

[0014] Furthermore, the fixing assembly also includes a sealing structure, which includes a sealing cylinder and a sealing cover. The sealing cylinder is assembled on the inner top wall of the cylinder body and is connected to the cylinder body. The sealing cover is threadedly connected to the outer side of the sealing cylinder.

[0015] Furthermore, a through hole for the valve needle to pass through is opened inside the sealing cover, and the shape of the inner wall of the sealing cylinder is adapted to the shape of the connecting plate.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0017] 1. The hot runner cylinder with a built-in fixing plug passes the connecting plate at the bottom of the valve needle through between the two clamping plates and extends it to the inside of the fixing seat. The valve needle is then rotated to drive the connecting plate connected to it to rotate, so that the connecting plate is rotated to the bottom of the two clamping plates to ensure that the valve needle will not be pulled out from the inside of the fixing seat. The connecting plate extends downward to push the top plate to compress the spring. The potential energy of the spring makes the top plate always maintain an upward force, thereby ensuring that the connecting plate effectively fits the lower surfaces of the two clamping plates.

[0018] 2. For the hot runner cylinder with built-in fixed plug, when it is necessary to connect the valve needle and the piston, first unscrew the sealing cover from the outside of the sealing cylinder, then insert the valve needle with the connecting plate from the inside of the sealing cylinder, so that the bottom end of the valve needle passes through the sealing cylinder and extends to the inside of the fixed seat, then insert the sealing cover from the top of the valve needle, and seal the valve needle by tightening the sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the fixed component of the utility model;

[0022] Figure 4 This is a front structural diagram of the fixing assembly of the utility model;

[0023] Figure 5 This is a schematic diagram of the sealing structure of the utility model.

[0024] In the figure: 1. base; 2. cylinder body; 3. piston; 4. valve needle; 5. fixing assembly; 501. fixing seat; 502. clamping plate; 503. connecting plate; 504. sleeve; 505. push rod; 506. top plate; 507. spring; 6. sealing structure; 601. sealing cylinder; 602. sealing cover. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-2 In this embodiment, a hot runner cylinder with a built-in fixing plug is used to fix the valve needle 4.

[0027] It includes a base 1, a cylinder body 2, a piston 3, a valve needle 4 and a fixing assembly 5; the cylinder body 2 is installed on the base 1, the piston 3 is slidably connected inside the cylinder body 2, and the valve needle 4 is assembled on the piston 3 through the fixing assembly 5.

[0028] In actual use, the valve needle 4 is installed on the piston 3 through the fixing assembly 5, so as to realize the connection between the valve needle 4 and the piston 3, and there is no need to separate the cylinder body 2 and the base 1 during the installation process.

[0029] See also Figure 3-4 In order to facilitate the fixing of the valve needle 4, the fixing assembly 5 in this embodiment includes a fixing seat 501, at least two clamping plates 502 and a connecting plate 503; the fixing seat 501 is installed at the center of the upper surface of the piston 3, and the fixing seat 501 has a cavity vertically opened, at least two clamping plates 502 are arranged on the inner wall of the fixing seat 501 at a front-to-back interval, and are located on the same horizontal line as the upper end surface of the fixing seat 501, and the connecting plate 503 is assembled at the bottom end of the piston 3.

[0030] During actual use, the connecting plate 503 at the bottom of the valve needle 4 is passed through between the two clamping plates 502 and extended to the inside of the fixed seat 501. The valve needle 4 is then rotated to drive the connecting plate 503 connected to it to rotate, so that the connecting plate 503 is rotated to the bottom of the two clamping plates 502 to ensure that the valve needle 4 will not be pulled out from the inside of the fixed seat 501.

[0031] It should be noted that the length of the connecting plate 503 in the X-axis direction in this embodiment is adapted to the diameter of the inner wall of the fixing seat 501, and the length of the connecting plate 503 in the Y-axis direction is adapted to the spacing between the two clamping plates 502; the shape of the connecting plate 503 on the XY plane is a rectangle with convex sides on the left and right sides.

[0032] Furthermore, in order to ensure that the connecting plate 503 can effectively fit under the two clamping plates 502, in this embodiment, a sleeve 504 is installed on the inner bottom wall of the fixed seat 501, and a push rod 505 is slidably connected inside the sleeve 504, and the upper end surface of the push rod 505 is equipped with a top plate 506, and the top plate 506 is located under at least two clamping plates 502, and a spring 507 is installed between the top plate 506 and the inner bottom wall of the fixed seat 501, and the spring 507 is sleeved on the outside of the sleeve 504 and the push rod 505.

[0033] In actual use, the connecting plate 503 extends downward to push the top plate 506 to compress the spring 507. The potential energy of the spring 507 allows the top plate 506 to always maintain an upward force, thereby ensuring that the connecting plate 503 effectively fits with the lower surfaces of the two card plates 502.

[0034] In addition, when the top plate 506 moves downward, the top rod 505 will be pushed into the interior of the sleeve 504. Through the cooperation between the top rod 505 and the sleeve 504, the top plate 506 is guided to ensure the stability of the top plate 506 when moving.

[0035] See also Figure 5 In order to improve the sealing effect between the valve needle 4 and the cylinder body 2, the fixing assembly 5 in this embodiment also includes a sealing structure 6, which includes a sealing cylinder 601 and a sealing cover 602. The sealing cylinder 601 is assembled on the inner top wall of the cylinder body 2, and the sealing cylinder 601 is connected to the cylinder body 2, and the sealing cover 602 is threadedly connected to the outer side of the sealing cylinder 601.

[0036] In actual use, when it is necessary to connect the valve needle 4 to the piston 3, first unscrew the sealing cover 602 from the outside of the sealing cylinder 601, and then insert the valve needle 4 with the connecting plate 503 from the inside of the sealing cylinder 601, so that the bottom end of the valve needle 4 passes through the sealing cylinder 601 and extends to the inside of the fixed seat 501, and then insert the sealing cover 602 from the top of the valve needle 4. By tightening the sealing cover 602, the valve needle 4 can be sealed.

[0037] It should be noted that a through hole for the valve needle 4 to pass through is provided inside the sealing cover 602 , and the shape of the inner wall of the sealing cylinder 601 is matched with the shape of the connecting plate 503 .

[0038] 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 a built-in fixed plug, characterized in that: It comprises a base (1), a cylinder body (2), a piston (3), a valve needle (4) and a fixing assembly (5); The cylinder body (2) is mounted on the base (1), the piston (3) is slidably connected inside the cylinder body (2), and the valve needle (4) is assembled on the piston (3) through a fixing assembly (5); The fixing assembly (5) comprises a fixing seat (501), at least two clamping plates (502) and a connecting plate (503); The fixing seat (501) is installed at the center of the upper surface of the piston (3), and the fixing seat (501) is provided with a cavity in the vertical direction. At least two clamping plates (502) are arranged on the inner wall of the fixing seat (501) at a front-to-back interval and are located on the same horizontal line as the upper end surface of the fixing seat (501). The connecting plate (503) is assembled on the bottom end of the piston (3).

2. A hot runner cylinder with a built-in fixing plug according to claim 1, characterized in that: The length of the connecting plate (503) in the X-axis direction is matched to the diameter of the inner wall of the fixing seat (501).

3. A hot runner cylinder with a built-in fixing plug according to claim 1, characterized in that: The length of the connecting plate (503) in the Y-axis direction is adapted to the distance between the two clamping plates (502); The shape of the connecting plate (503) on the XY plane is a rectangle with convex sides on the left and right sides.

4. A hot runner cylinder with a built-in fixing plug according to claim 1, characterized in that: A sleeve (504) is installed on the inner bottom wall of the fixed seat (501), and a push rod (505) is slidably connected inside the sleeve (504), and a top plate (506) is installed on the upper end surface of the push rod (505), and the top plate (506) is located below at least two clamping plates (502), and a spring (507) is installed between the top plate (506) and the inner bottom wall of the fixed seat (501).

5. The hot runner cylinder with a built-in fixing plug according to claim 4, characterized in that: The spring (507) is sleeved on the outer sides of the sleeve (504) and the push rod (505).

6. The hot runner cylinder with a built-in fixing plug according to claim 1, characterized in that: The fixing assembly (5) further comprises a sealing structure (6), wherein the sealing structure (6) comprises a sealing cylinder (601) and a sealing cover (602), wherein the sealing cylinder (601) is mounted on the inner top wall of the cylinder body (2), and the sealing cylinder (601) is connected to the cylinder body (2), and the sealing cover (602) is threadedly connected to the outer side of the sealing cylinder (601).

7. A hot runner cylinder with a built-in fixing plug according to claim 6, characterized in that: A through hole for the valve needle (4) to pass through is provided inside the sealing cover (602), and the shape of the inner wall of the sealing cylinder (601) is adapted to the shape of the connecting plate (503).

Images