Melted HDPE (high-density polyethylene) plastic injection device for weather-resistant composite pipe

Abstract

The utility model relates to the field of pipeline production, in particular to a molten HDPE (High-Density Polyethylene) plastic injection device for a weather-resistant composite pipe. According to the molten HDPE plastic injection device for the weather-resistant composite pipe, the raw material injection position can be continuously adjusted and changed, and raw materials are prevented from being accumulated. A molten HDPE plastic injection device for weather-resistant composite pipes comprises an injection mold, a heat preservation frame, a cover plate and injection molding pipes, the heat preservation frame is connected to the injection mold, the cover plate is connected to the top of the injection mold in a clamped mode, and the two injection molding pipes are connected to the cover plate. The output shaft of the driving motor is controlled to rotate to drive the second gear to rotate, so that the first gear drives the cover plate to rotate back and forth, raw materials are prevented from being accumulated at one position when being injected into an injection mold, and the uniformity of raw material injection is improved.

Description

Technical Field

[0001] The utility model relates to the field of pipeline production, in particular to a molten HDPE plastic injection device for weather-resistant composite pipes. Background Art

[0002] Composite pipes are pipes based on a composite structure of metal and thermoplastic plastics, and are lined with non-metallic materials such as polypropylene, polyethylene or welded cross-linked polyethylene. They have the advantages of metal pipes and non-metallic pipes. In the production of composite coffins in the prior art, it is necessary to use a mold for unified injection molding, so that the injection molding raw materials are cooled and formed in the mold, and finally the molded coffin is taken out. However, when the prior art performs injection molding operations, the injection position of the raw materials is relatively fixed, that is, the landing point of the raw materials after entering the mold is relatively fixed, so the raw materials are easily accumulated in the same position. At this time, it is necessary to wait for the raw materials to be evenly dispersed, which will consume a certain amount of time, resulting in a decrease in overall efficiency.

[0003] Therefore, in view of the above problems, a molten HDPE plastic injection device for weather-resistant composite pipes is now developed, which can continuously adjust and change the raw material injection position to avoid the accumulation of raw materials. Utility Model Content

[0004] In order to overcome the shortcomings of existing devices in which the injection position of raw materials is relatively fixed and the raw materials are easily accumulated at the same position, and it is necessary to wait for the raw materials to be evenly spread, which consumes a certain amount of time and leads to a decrease in overall efficiency, the utility model provides a molten HDPE plastic injection device for weather-resistant composite pipes that can continuously adjust and change the raw material injection position to avoid accumulation of raw materials.

[0005] The technical scheme of the utility model is: a molten HDPE plastic injection device for weather-resistant composite pipes, comprising an injection mold, an insulation frame, a cover plate and an injection pipe, the injection mold is connected to the insulation frame, the top of the injection mold is clamped with a cover plate, and two injection pipes are connected to the cover plate.

[0006] Optionally, it also includes a driving motor, a protective cover, a first gear and a second gear. The driving motor is connected to the upper left side of the insulation frame, the second gear is connected to the output shaft of the driving motor, the protective cover is connected to the top of the insulation frame, and the first gear that meshes with the second gear is rotatably connected between the protective cover and the insulation frame, and the first gear is clamped to the cover plate.

[0007] Optionally, it also includes a mounting part, a hydraulic cylinder and an ejector frame. The mounting part is connected to the middle position inside the injection mold, the bottom of the mounting part is connected to the hydraulic cylinder, the telescopic end of the hydraulic cylinder is connected to the ejector frame, and the ejector frame is slidably connected to the injection mold.

[0008] Optionally, there is a suspended structure at the bottom of the injection mold, which maintains a certain distance from the ground.

[0009] Optionally, a rib is installed at the bottom of the injection mold to improve the support stability.

[0010] Optionally, a stabilizing frame is connected between the driving motor and the heat preservation frame.

[0011] The utility model has the following advantages: 1. The utility model drives the second gear to rotate by controlling the output shaft of the driving motor, so that the first gear drives the cover plate to rotate reciprocatingly, thereby preventing the raw material from accumulating in one position when injected into the injection mold, and improving the uniformity of the raw material injection.

[0012] 2. The utility model opens the pipe discharging channel by removing the cover plate, and then relies on the hydraulic cylinder to drive the ejection frame to move upward to realize the automatic discharging of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0014] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model.

[0015] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model.

[0016] The meanings of the reference numerals in the figure are: 1: injection mold, 2: insulation frame, 3: cover plate, 4: injection tube, 5: drive motor, 6: protective cover, 7: first gear, 8: second gear, 9: mounting part, 10: hydraulic cylinder, 11: ejector frame. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail with reference to the accompanying drawings. It is hereby stated that the directional words such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the utility model are only based on the accompanying drawings of the utility model, and are not specific limitations of the utility model.

[0018] Example 1

[0019] A device for injecting molten HDPE plastic into a weather-resistant composite pipe, such as Figure 1-Figure 3 As shown, it includes an injection mold 1, an insulation frame 2, a cover plate 3 and an injection tube 4. There is a suspended structure at the bottom of the injection mold 1, which maintains a certain distance from the ground. Ribs for improving support stability are installed at the bottom of the injection mold 1. The injection mold 1 is connected to an insulation frame 2 for maintaining a constant temperature. The top of the injection mold 1 is clamped with a cover plate 3, and the cover plate 3 is connected to two injection tubes 4.

[0020] like Figure 1-Figure 3 As shown, it also includes a driving motor 5, a protective cover 6, a first gear 7 and a second gear 8. The driving motor 5 is connected to the upper left side of the insulation frame 2, and the output shaft of the driving motor 5 is set to face downward. A stabilizing frame is connected between the driving motor 5 and the insulation frame 2. The second gear 8 is connected to the output shaft of the driving motor 5. A protective cover 6 for preventing high-temperature heat leakage is connected to the top of the insulation frame 2. A first gear 7 that meshes with the second gear 8 is rotatably connected between the protective cover 6 and the insulation frame 2, and the first gear 7 is clamped with the cover plate 3.

[0021] It should be noted that when manufacturing weather-resistant composite pipes, the device can be used for injection molding. First, the raw material is fed into the injection mold 1 through the injection tube 4. The drive motor 5 is started while the raw material is injected. The output shaft of the drive motor 5 drives the second gear 8 to rotate back and forth during rotation, thereby causing the mutually meshing first gears 7 to rotate back and forth synchronously, thereby avoiding the raw material from accumulating at the same position when entering the injection mold 1 through the injection tube 4, thereby making the raw material injection more uniform. When the injection molding is completed, the drive motor 5 is turned off and the injection of the raw material is stopped. In summary, the second gear 8 is driven to rotate by controlling the output shaft of the drive motor 5, thereby causing the first gear 7 to drive the cover plate 3 to rotate back and forth, thereby continuously changing the raw material landing position when the raw material is injected into the injection mold 1, thereby avoiding the raw material from accumulating at one position when injected into the injection mold 1, thereby improving the uniformity of the raw material injection.

[0022] Example 2

[0023] On the basis of Example 1, Figure 2 As shown, it also includes a mounting part 9, a hydraulic cylinder 10 and an ejector frame 11. The mounting part 9 is connected to the middle position inside the injection mold 1, and the hydraulic cylinder 10 is connected to the bottom of the mounting part 9. The telescopic end of the hydraulic cylinder 10 is set to face downward, and the telescopic end of the hydraulic cylinder 10 is connected to the ejector frame 11 for pushing the pipe after injection molding and cooling to discharge the material. The ejector frame 11 is slidably connected to the injection mold 1.

[0024] It should be noted that after the weather-resistant composite pipe is injection molded and cooled and finalized, the cover plate 3 can be detached from the injection mold 1 so that the pipe discharge position is no longer blocked, and then the telescopic end of the hydraulic cylinder 10 is controlled to retract, so that the ejector frame 11 starts to slide upward along the injection mold 1, and while the ejector frame 11 slides upward, it pushes the formed pipe to move upward for discharge. In summary, the pipe discharge channel is opened by removing the cover plate 3, and then the ejector frame 11 is driven upward by the hydraulic cylinder 10 to realize automatic discharge of the pipe.

[0025] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A device for injecting molten HDPE plastic into a weather-resistant composite pipe, characterized in that: The invention comprises an injection mould (1), a heat preservation frame (2), a cover plate (3) and an injection moulding tube (4); the injection mould (1) is connected to the heat preservation frame (2); the top of the injection mould (1) is clamped with the cover plate (3); and the cover plate (3) is connected to two injection moulding tubes (4); The heat preservation frame (2) further comprises a driving motor (5), a protective cover (6), a first gear (7) and a second gear (8); the driving motor (5) is connected to the upper left side of the heat preservation frame (2); the second gear (8) is connected to the output shaft of the driving motor (5); the top of the heat preservation frame (2) is connected to the protective cover (6); a first gear (7) meshing with the second gear (8) is rotatably connected between the protective cover (6) and the heat preservation frame (2); and the first gear (7) is snap-connected to the cover plate (3).

2. The device for injecting molten HDPE plastic into a weather-resistant composite pipe as claimed in claim 1, characterized in that: It also comprises a mounting member (9), a hydraulic cylinder (10) and an ejector frame (11); the mounting member (9) is connected to the middle position inside the injection mold (1); the bottom of the mounting member (9) is connected to the hydraulic cylinder (10); the telescopic end of the hydraulic cylinder (10) is connected to the ejector frame (11); and the ejector frame (11) is slidably connected to the injection mold (1).

3. The device for injecting molten HDPE plastic into a weather-resistant composite pipe according to claim 1, characterized in that: There is a suspended structure at the bottom of the injection mold (1), which maintains a certain distance from the ground.

4. The device for injecting molten HDPE plastic into a weather-resistant composite pipe as claimed in claim 1, characterized in that: The bottom of the injection mold (1) is provided with ribs for improving support stability.

5. The device for injecting molten HDPE plastic into a weather-resistant composite pipe as claimed in claim 1, characterized in that: A stabilizing frame is connected between the driving motor (5) and the heat preservation frame (2).

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