Novel high-sealing injection plunger mechanism of injection molding machine

Abstract

The utility model discloses a novel high-sealing injection plunger mechanism of an injection molding machine, which relates to the technical field of injection molding machines and comprises a plunger barrel, a front plug is arranged in the plunger barrel, a middle plug is in threaded connection with one side of the front plug, a rear plug is arranged on one side of the middle plug, a push rod is in threaded connection with the outer surface of one side of the middle plug, and the push rod is in threaded connection with the outer surface of the other side of the middle plug. A first sealing washer is arranged between the front plug and the middle plug, and a second sealing washer is arranged between the middle plug and the rear plug; according to the utility model, the plunger is divided into the front plug, the middle plug, the rear plug and the push rod, the first sealing washer is additionally arranged between the front plug and the middle plug, and the second sealing washer is additionally arranged between the middle plug and the rear plug, so that the risk of glue leakage in the use process of the plunger is reduced, and meanwhile, the components are not fixed through screws, so that glue leakage caused by screw gaps is avoided; and the sealing effect is further improved, and the first sealing gasket and the second sealing gasket can be conveniently replaced through the separately arranged plunger.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a new type of high-sealing injection plunger mechanism for injection molding machines. Background Technique

[0002] In the plastic processing industry, an injection molding machine is a key device for producing various plastic products, and the plunger mechanism is an important part of the injection molding machine. However, in the actual use process, the traditional plunger mechanism often has problems such as glue leakage due to poor sealing performance, which not only affects the product quality and production efficiency, but also increases the equipment maintenance cost. Therefore, developing a new type of high-sealing plunger mechanism that can prevent glue leakage is of great significance for improving the overall performance and reliability of the injection molding machine.

[0003] However, the traditional plunger is prone to problems such as glue leakage and jamming due to too tight or too loose fit with the plunger barrel. At the same time, different silicone materials require different plungers, and the replacement process of the traditional plunger is very troublesome and the replacement cost is relatively high.

[0004] In view of this, a new type of high-sealing injection plunger mechanism for injection molding machines is provided to overcome the above defects. Content of the Utility Model

[0005] The purpose of the utility model is to provide a new type of high-sealing injection plunger mechanism for injection molding machines to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, a new type of high-sealing injection plunger mechanism for injection molding machines provided by the utility model includes a plunger barrel, a front plug is arranged inside the plunger barrel, a middle plug is threadedly connected to one side of the front plug, a rear plug is arranged on one side of the middle plug, a push rod is threadedly connected to the outer surface of one side of the middle plug, a first sealing washer is arranged between the front plug and the middle plug, and a second sealing washer is arranged between the middle plug and the rear plug.

[0007] Furthermore, circular groove holes are opened inside both the middle plug and the push rod, and circular docking columns are integrally formed on the rear sides of the front plug and the middle plug, and the circular docking columns are adapted to the circular groove holes.

[0008] Furthermore, a threaded groove is opened on the outer wall of the push rod, a mounting piece is fixedly installed on the outer wall of the push rod, and an arc-shaped piece is fixedly installed on one side of the mounting piece.

[0009] Furthermore, a slidable moving ring is sleeved on the outer wall of the push rod, and one side of the moving ring is fixedly connected to the arc-shaped piece.

[0010] Furthermore, a threaded moving sleeve is threadedly connected to the outer wall of the push rod, and the threaded moving sleeve is on one side of the moving ring in the initial state.

[0011] Further, one side of the threaded moving sleeve is fixedly connected with a rotating piece, and a plurality of semi-circular grooves are formed on the outer wall of the rotating piece.

[0012] Further, the specific material of the arc-shaped piece is rubber.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] By dividing the plunger into a front plug, a middle plug, a rear plug and a push rod, and installing a first sealing washer between the front plug and the middle plug, and a second sealing washer between the middle plug and the rear plug, the risk of glue leakage during the use of the plunger is reduced. At the same time, the several components are not fixed by screws, avoiding glue leakage caused by screw gaps, further increasing the sealing effect. The separately arranged plunger is convenient for replacing the first sealing washer and the second sealing washer.

[0015] By providing the arc-shaped piece, the push rod and related components will be more stably fixed inside the plunger barrel and will not move easily under non-human conditions. At the same time, the arc-shaped piece will help to fix the position of the plunger, thereby reducing the overall wear of the plunger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic cross-sectional structure diagram inside the present utility model;

[0017] Figure 2 is a schematic side structure diagram of the present utility model;

[0018] Figure 3 is a schematic overall view structure diagram of the present utility model.

[0019] In the figure: 1, plunger barrel; 2, front plug; 3, middle plug; 4, rear plug; 5, first sealing washer; 6, second sealing washer; 7, push rod; 8, thread groove; 9, threaded moving sleeve; 10, moving ring; 11, arc-shaped piece; 12, mounting piece; 13, rotating piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Embodiment 1

[0022] Refer to Figures 1 - 3, a new type of high-sealing injection plunger mechanism for an injection molding machine, including a plunger barrel 1. Inside the plunger barrel 1, there is a front plug 2. On one side of the front plug 2, a middle plug 3 is threadedly connected. On one side of the middle plug 3, there is a rear plug 4. On the outer surface of one side of the middle plug 3, a push rod 7 is threadedly connected. A first sealing washer 5 is arranged between the front plug 2 and the middle plug 3, and a second sealing washer 6 is arranged between the middle plug 3 and the rear plug 4.

[0023] Further, refer to Figure 2 , circular groove holes are opened inside both the middle plug 3 and the push rod 7. Circular docking columns are integrally formed on the rear sides of the front plug 2 and the middle plug 3. The circular docking columns are adapted to the circular groove holes. By setting the circular groove holes and the circular docking columns, the front plug 2, the middle plug 3, and the push rod 7 will not easily deflect when docking, and accurate positioning can be completed.

[0024] During specific implementation, in the process of using a conventional plunger mechanism, glue leakage and jamming may occur, and there is wear, with a short service life and inability to be compatible with different silicone materials.

[0025] In this utility model, the user can place the first sealing washer 5 between the front plug 2 and the middle plug 3, and then tighten the front plug 2 and the middle plug 3 to complete the fixation of the first sealing washer 5 for the plunger barrel 1. For the second sealing washer 6, it needs to be first sleeved on the outer wall of the rear side of the middle plug 3, then the rear plug 4 is sleeved on one side of the second sealing washer 6, and finally the push rod 7 is installed on one side of the rear plug 4 to complete the fixation of the rear plug 4. When the rear plug 4 is fixed, the second sealing washer 6 between the middle plug 3 and the rear plug 4 is also fixed.

[0026] It should be noted that the size of the middle plug 3 is not fixed and can be adjusted according to the actual needs of the user to adapt to different silicone materials.

[0027] By dividing the plunger into the front plug 2, the middle plug 3, the rear plug 4, and the push rod 7, and adding the first sealing washer 5 between the front plug 2 and the middle plug 3, and adding the second sealing washer 6 between the middle plug 3 and the rear plug 4, the risk of glue leakage during the use of the plunger is reduced. At the same time, the several components are not fixed by screws, avoiding glue leakage caused by screw gaps, further increasing the sealing effect, and the separately arranged plunger is convenient for replacing the first sealing washer 5 and the second sealing washer 6.

[0028] Embodiment 2

[0029] On the basis of Embodiment 1, please refer to Figures 1 - 3, a new type of highly sealed injection plunger mechanism for an injection molding machine. Among them, a threaded groove 8 is provided on the outer wall of the push rod 7, and a mounting piece 12 is fixedly installed on the outer wall of the push rod 7. An arc-shaped piece 11 is fixedly installed on one side of the mounting piece 12. A slidable moving ring 10 is sleeved on the outer wall of the push rod 7, and one side of the moving ring 10 is fixedly connected to the arc-shaped piece 11.

[0030] Further, refer to Figure 3 , a threaded moving sleeve 9 is threadedly connected to the outer wall of the push rod 7. In the initial state, the threaded moving sleeve 9 is on one side of the moving ring 10. One side of the threaded moving sleeve 9 is fixedly connected to a rotating piece 13, and a plurality of semi-circular grooves are provided on the outer wall of the rotating piece 13.

[0031] In addition, the specific material of the arc-shaped piece 11 is rubber, the material of the moving ring 10 is iron, and an annular magnet is installed on the side wall of the threaded moving sleeve 9 close to the moving ring 10. By setting the specific material of the arc-shaped piece 11 to be rubber, the arc-shaped piece 11 will deform after the moving ring 10 is touched. By setting the material of the moving ring 10 to be iron and installing an annular magnet on the side wall of the threaded moving sleeve 9 close to the moving ring 10, the threaded moving sleeve 9 can drive the moving ring 10 to move together during the retraction process.

[0032] During specific implementation, in the normal state, the plunger is prone to severe wear after long-term use, which affects the fixing effect of the device.

[0033] In this utility model, the user can move the front plug 2, middle plug 3, rear plug 4 and push rod 7 further into the plunger barrel 1. After the mounting piece 12 is inside the plunger barrel 1, the user can turn the rotating piece 13. After the rotating piece 13 is turned, the threaded moving sleeve 9 will move to one side. At this time, the moving threaded moving sleeve 9 will directly touch the moving ring 10. After the moving ring 10 is touched and moves, it will touch the arc-shaped piece 11, causing the arc-shaped piece 11 to deform. After the arc-shaped piece 11 deforms, the outer wall of the arc-shaped piece 11 will directly touch the inner wall of the plunger barrel 1. At this time, the push rod 7 and the parts connected to the outer wall of the push rod 7 can no longer move easily.

[0034] By setting the arc-shaped piece 11, the push rod 7 and related components will be more stably fixed inside the plunger barrel 1 and will not move easily under non-human conditions. At the same time, the arc-shaped piece 11 will help fix the position of the plunger, thereby reducing the overall wear of the plunger.

[0035] Working principle: Conventional plunger mechanisms may experience glue leakage, jamming during use, and wear, with a short service life and inability to be compatible with different silicone materials.

[0036] In this utility model, the user can place the first sealing washer 5 between the front plug 2 and the middle plug 3, and then tighten the front plug 2 and the middle plug 3 to complete the fixation of the first sealing washer 5 on the plunger barrel 1. For the second sealing washer 6, it is necessary to first sleeved on the outer wall at the rear side of the middle plug 3, then sleeve the rear plug 4 on one side of the second sealing washer 6, and finally install the push rod 7 on one side of the rear plug 4 to complete the fixation of the rear plug 4. When the rear plug 4 is fixed, the second sealing washer 6 between the middle plug 3 and the rear plug 4 is also fixed.

[0037] Under normal conditions, the plunger is prone to serious wear after long-term use, which affects the fixing effect of the device.

[0038] In this utility model, the user can move the front plug 2, the middle plug 3, the rear plug 4 and the push rod 7 further into the plunger barrel 1. After the mounting piece 12 is inside the plunger barrel 1, the user can turn the rotating piece 13. After the rotating piece 13 is turned, the threaded moving sleeve 9 will move to one side. At this time, the moving threaded moving sleeve 9 will directly abut against the moving ring 10. After the moving ring 10 is abutted and moved, it will abut against the arc-shaped piece 11, causing the arc-shaped piece 11 to deform. After the arc-shaped piece 11 deforms, the outer wall of the arc-shaped piece 11 will directly abut against the inner wall of the plunger barrel 1. At this time, the push rod 7 and the parts connected to the outer wall of the push rod 7 cannot move easily anymore.

[0039] By dividing the plunger into the front plug 2, the middle plug 3, the rear plug 4 and the push rod 7, and adding the first sealing washer 5 between the front plug 2 and the middle plug 3, and adding the second sealing washer 6 between the middle plug 3 and the rear plug 4, the risk of glue leakage during the use of the plunger is reduced. At the same time, the several components are not fixed by screws, avoiding glue leakage caused by screw gaps, further increasing the sealing effect. The separately arranged plunger is convenient for replacing the first sealing washer 5 and the second sealing washer 6.

[0040] By setting the arc-shaped piece 11, the push rod 7 and related components will be more stably fixed inside the plunger barrel 1 and will not move easily under non-human conditions. At the same time, the arc-shaped piece 11 will help fix the position of the plunger, thereby reducing the overall wear of the plunger.

Claims

1. A new type of high-sealing injection plunger mechanism for an injection molding machine, including a plunger barrel (1), characterized in that, Inside the plunger barrel (1), a front plug (2) is provided. A middle plug (3) is threadedly connected to one side of the front plug (2). A rear plug (4) is provided on one side of the middle plug (3). A push rod (7) is threadedly connected to the outer surface on one side of the middle plug (3). A first sealing washer (5) is provided between the front plug (2) and the middle plug (3). A second sealing washer (6) is provided between the middle plug (3) and the rear plug (4).

2. A novel high-sealing injection plunger mechanism of an injection molding machine according to claim 1, characterized in that: Circular slot holes are formed inside both the middle plug (3) and the push rod (7). Circular docking posts are integrally formed on the rear sides of the front plug (2) and the middle plug (3), and the circular docking posts are adapted to the circular slot holes.

3. A novel high-sealing injection plunger mechanism of an injection molding machine according to claim 1, characterized in that: Thread grooves (8) are formed on the outer wall of the push rod (7). A mounting piece (12) is fixedly installed on the outer wall of the push rod (7). An arc-shaped piece (11) is fixedly installed on one side of the mounting piece (12).

4. A novel high-sealing injection plunger mechanism of an injection molding machine according to claim 1, characterized in that: A slidable moving ring (10) is sleeved on the outer wall of the push rod (7). One side of the moving ring (10) is fixedly connected to the arc-shaped piece (11).

5. A novel high-sealing injection plunger mechanism of an injection molding machine according to claim 1, characterized in that: A threaded moving sleeve (9) is threadedly connected to the outer wall of the push rod (7). The threaded moving sleeve (9) is located on one side of the moving ring (10) in the initial state.

6. The novel highly-sealed injection plunger mechanism of an injection molding machine according to claim 5, wherein: One side of the threaded moving sleeve (9) is fixedly connected to a rotating piece (13). A plurality of semi-circular slots are formed on the outer wall of the rotating piece (13).

7. A novel high-sealing injection plunger mechanism of an injection molding machine according to claim 4, characterized in that: The specific material of the arc-shaped piece (11) is rubber.

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