Core-pulling hot runner injection mold for plastic accessories

Abstract

The utility model discloses a plastic accessory core-pulling hot runner injection mold which comprises a fixed mold body, the upper end of the fixed mold body is fixedly connected with a plurality of guide rods, the upper ends of the plurality of guide rods are jointly and fixedly connected with a top plate, and the lower end of the top plate is provided with a hydraulic telescopic rod; the telescopic end of the hydraulic telescopic rod is fixedly connected with a lifting plate, the multiple guide rods all penetrate through the lifting plate and are in sliding connection with the lifting plate, and a movable mold body is installed at the lower end of the lifting plate; and the cooling mechanism comprises hollow strips symmetrically and fixedly connected to the left side and the right side of the fixed mold body, the two hollow strips communicate with each other through a cooling runner, a pump body is installed on the left side of the fixed mold body, and the water outlet end of the pump body communicates with the hollow strip on the left side. According to the injection molding module, the multiple guide rods are used, movement of the movable mold body can be more stable, and in addition, due to the use of the cleaning mechanism, subsequent water scale cleaning of the cooling runner is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a core-pulling hot runner injection mold for plastic accessories. Background Art

[0002] Injection molding is also called injection molding. It is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. When processing rubber accessories, especially some accessories with inner cavities or inner channels, core-pulling molds are required. There are also the following problems when using them;

[0003] After injection molding, the melted plastic needs to be cooled down quickly. In the traditional cooling method, in order to utilize the heat energy, the plastic is cooled down by flowing water. The water after heat exchange stores the heat energy and can be directly used in some scenes that need hot water to achieve heat recovery. However, due to the extremely high temperature of the fixed mold, the water quickly heats up in the cooling channel, which is easy to produce scale. Long-term scale accumulation can easily block the flow, and the channel is located inside, so it is more troublesome to clean. For this problem, how to solve it is what we need to consider. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a core-pulling hot runner injection mold for plastic accessories. The injection molding module utilizes multiple guide rods to make the movement of the movable mold body more stable. In addition, the use of a cleaning mechanism facilitates the subsequent cleaning of scale on the cooling runner.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A core-pulling hot runner injection mold for plastic accessories, comprising a fixed mold body, a plurality of guide rods are fixedly connected to the upper end of the fixed mold body, the upper ends of the plurality of guide rods are commonly fixedly connected to a top plate, a hydraulic telescopic rod is installed at the lower end of the top plate, the telescopic end of the hydraulic telescopic rod is fixedly connected to a lifting plate, the plurality of guide rods all penetrate the lifting plate and are slidably connected to the lifting plate, and a movable mold body is installed at the lower end of the lifting plate; a cooling mechanism, the cooling mechanism comprises hollow bars symmetrically fixedly connected to the left and right sides of the fixed mold body, the two hollow bars are connected through a cooling flow channel, a pump body is installed on the left side of the fixed mold body, the water outlet end of the pump body is connected to the left hollow bar, the water inlet end of the pump body is connected to a first branch pipe, and the hollow bar on the right is connected to a third branch pipe; a cleaning mechanism, the cleaning mechanism is used to clean the cooling flow channel.

[0007] Preferably, the cooling channel runs through the interior of the fixed mold body.

[0008] Preferably, a plurality of core rods are fixedly connected to the inner top of the movable mold body.

[0009] Preferably, an injection port is installed at the upper end of the movable mold body.

[0010] Preferably, the cleaning mechanism comprises a cleaning box fixedly connected to the fixed mold body, the liquid inlet end of the pump body is connected to the cleaning box through a second branch pipe, and the hollow bar located on the right side is connected to the cleaning box through a fourth branch pipe.

[0011] Preferably, solenoid valves are installed in the first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] Through the use of multiple guide rods, the movement of the movable mold body can be made more stable. In addition, through the use of the cleaning mechanism, the pump body can be used to produce circulating water flow in the cleaning box, the left hollow bar, the cooling flow channel, the right hollow bar and the cleaning box, so that the descaling chelating agent or acid solution can fully contact the scale and clean the scale comprehensively. It uses the same pump body as the cooling mechanism, which can avoid the use of multiple pump bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a core-pulling hot runner injection mold for plastic parts proposed by the utility model;

[0015] Figure 2 for Figure 1 Bottom view of

[0016] Figure 3 for Figure 1 Schematic cross-section diagram of .

[0017] In the figure: 1 fixed mold body, 2 guide rod, 3 top plate, 4 lifting plate, 5 hydraulic telescopic rod, 6 injection port, 7 movable mold body, 8 cleaning box, 9 pump body, 10 hollow bar, 11 first branch pipe, 12 second branch pipe, 13 third branch pipe, 14 fourth branch pipe, 15 core rod, 16 cooling flow channel. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-3A core-pulling hot runner injection mold for plastic parts, comprising a fixed mold body 1, a plurality of guide rods 2 are fixedly connected to the upper end of the fixed mold body 1, a top plate 3 is fixedly connected to the upper ends of the plurality of guide rods 2, a hydraulic telescopic rod 5 is installed at the lower end of the top plate 3, a lifting plate 4 is fixedly connected to the telescopic end of the hydraulic telescopic rod 5, a plurality of guide rods 2 all penetrate the lifting plate 4 and are slidably connected to the lifting plate 4, a movable mold body 7 is installed at the lower end of the lifting plate 4, a plurality of core rods 15 are fixedly connected to the inner top of the movable mold body 7, and an injection port 6 is installed at the upper end of the movable mold body 7;

[0020] Among them, it also includes a cooling mechanism, which includes hollow bars 10 symmetrically fixedly connected to the left and right sides of the fixed mold body 1, and the two hollow bars 10 are connected through a cooling channel 16. A pump body 9 is installed on the left side of the fixed mold body 1, and the water outlet end of the pump body 9 is connected to the left hollow bar 10. The water inlet end of the pump body 9 is connected to a first branch pipe 11, and the other end of the first branch pipe 11 is connected to an external cold water tank. The hollow bar 10 on the right is connected to a third branch pipe 13, and the other end of the third branch pipe 13 is connected to an external water collection tank. The cooling channel 16 runs through the interior of the fixed mold body 1;

[0021] It also includes a cleaning mechanism, which is used to clean the cooling flow channel 16. The cleaning mechanism includes a cleaning box 8 fixedly connected to the fixed mold body 1. The liquid inlet end of the pump body 9 is connected to the cleaning box 8 through the second branch pipe 12. The hollow bar 10 located on the right is connected to the cleaning box 8 through the fourth branch pipe 14. Solenoid valves are installed in the first branch pipe 11, the second branch pipe 12, the third branch pipe 13 and the fourth branch pipe 14.

[0022] In the utility model, when in use, under normal heat dissipation conditions, by starting the pump body 9, the solenoid valve on the first branch pipe 11 and the solenoid valve on the third branch pipe 13, the pump body 9 will press the cooling water into the cooling channel 16, and finally discharge it from the third branch pipe 13. After discharge, the water body is a high-temperature water body, which can be directly used in the scene where hot water is needed, and the heat energy is recycled;

[0023] When it is necessary to clean the scale in the cooling channel 16, first add a descaling chelating agent (or acidic cleaning agent) into the cleaning box 8, and then start the pump body 9, the solenoid valves on the second branch pipe 12 and the fourth branch pipe 14, which will produce circulating water flow in the cleaning box 8, the left hollow bar 10, the cooling channel 16, the right hollow bar 10 and the cleaning box 8, so that the descaling chelating agent can fully and comprehensively contact with the scale. After a period of time, close the solenoid valve on the fourth branch pipe 14, open the solenoid valve on the third branch pipe 13, and the waste liquid will be discharged to the outside.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A core-pulling hot runner injection mold for plastic parts, characterized in that: include: A fixed mold body (1), wherein the upper end of the fixed mold body (1) is fixedly connected to a plurality of guide rods (2), the upper ends of the plurality of guide rods (2) are commonly fixedly connected to a top plate (3), a hydraulic telescopic rod (5) is installed at the lower end of the top plate (3), the telescopic end of the hydraulic telescopic rod (5) is fixedly connected to a lifting plate (4), the plurality of guide rods (2) all penetrate the lifting plate (4) and are slidably connected to the lifting plate (4), and a movable mold body (7) is installed at the lower end of the lifting plate (4); A cooling mechanism, the cooling mechanism comprising hollow bars (10) symmetrically fixedly connected to the left and right sides of the fixed mold body (1), the two hollow bars (10) being connected via a cooling channel (16), a pump body (9) being installed on the left side of the fixed mold body (1), the water outlet end of the pump body (9) being connected to the left hollow bar (10), the water inlet end of the pump body (9) being connected to a first branch pipe (11), and the hollow bar (10) on the right side being connected to a third branch pipe (13); A cleaning mechanism is used to clean the cooling flow channel (16).

2. A core-pulling hot runner injection mold for plastic parts according to claim 1, characterized in that: The cooling channel (16) runs through the interior of the fixed mold body (1).

3. A core-pulling hot runner injection mold for plastic parts according to claim 1, characterized in that: A plurality of core rods (15) are fixedly connected to the inner top of the movable mold body (7).

4. A core-pulling hot runner injection mold for plastic parts according to claim 1, characterized in that: An injection port (6) is installed at the upper end of the movable mold body (7).

5. The core-pulling hot runner injection mold for plastic parts according to claim 1, characterized in that: The cleaning mechanism comprises a cleaning box (8) fixedly connected to the fixed mold body (1); the liquid inlet end of the pump body (9) is connected to the cleaning box (8) through a second branch pipe (12); and the hollow bar (10) located on the right side is connected to the cleaning box (8) through a fourth branch pipe (14).

6. A core-pulling hot runner injection mold for plastic parts according to claim 5, characterized in that: Solenoid valves are installed in the first branch pipe (11), the second branch pipe (12), the third branch pipe (13) and the fourth branch pipe (14).

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