Injection device and online resin modification forming equipment

Abstract

The utility model discloses an injection device and on-line resin modification forming equipment, and belongs to the field of plastic forming processing, the injection device comprises a nozzle, a feed port, a change-over valve, a valve body channel, a storage cylinder and a plunger, the plunger comprises a plunger rod and a plunger body, and the valve body channel is a channel formed by connecting the feed port and the storage cylinder. A material cleaning protrusion is arranged on the plunger body, a propelling platform matched with the inner wall of a cavity, located at one end of the valve body channel, of the material storage cylinder is formed on the periphery of the connecting position of the material cleaning protrusion and the plunger body, and a flow channel axially penetrating through and connected with the propelling platform is arranged on the outer surface of the material cleaning protrusion. Cleaning is easy, blocking is not prone to occurring in the material cleaning process, and the reliability of equipment is improved.

Description

Technical Field

[0001] This application belongs to the field of plastic processing, and particularly relates to an injection device and an on-line resin modification and molding equipment. Background Art

[0002] Resin modification refers to changing the molecular structure or chemical properties of resin through physical or chemical means, so as to improve its performance or endow it with new properties. The modified resin may be improved in terms of processability, heat resistance, corrosion resistance, mechanical properties, etc. The molding and processing of the modified resin mainly uses the modified resin for various molding operations, such as injection molding, extrusion, blow molding, etc. Based on the improvement of the LFT-D (Direct Long Fiber Reinforced Thermoplastics) technology, the prior art proposes an on-line resin modification and molding equipment, which integrates the modification and molding processing of plastics and improves the quality and performance of plastic products.

[0003] During the plastic processing, the molding system of the injection molding equipment is prone to material accumulation and is difficult to clean. In the prior art, there is a structure for cleaning the barrel, which can achieve the purpose of cleaning the material. However, this structure is a porous structure inside, which increases the processing difficulty. Moreover, if the hole structure of the plunger itself is blocked, it is extremely inconvenient to clean the hole structure later, which is time-consuming and laborious. Summary of the Invention

[0004] In order to overcome the defects that the cleaning hole of the injection device in the prior art is easy to be blocked, difficult to clean, and has a high processing difficulty, the purpose of this application is to provide an injection device with a simple structure, not easy to be blocked, simple to clean and simple to process, which is specifically realized through the following technical solutions:

[0005] An injection device includes a nozzle, a feed port, a switching valve, a valve body channel, a storage cylinder, and a plunger. The plunger includes a plunger rod and a plunger body. The valve body channel is a channel formed by connecting the feed port and the storage cylinder. It is characterized in that a cleaning protrusion is provided on the plunger body, and a propulsion platform adapted to the inner wall of the cavity at one end of the storage cylinder located in the valve body channel is formed around the connection part of the cleaning protrusion and the plunger body. An axial flow channel that penetrates and connects the propulsion platform is provided on the outer surface of the cleaning protrusion.

[0006] Optionally, the non-channel part of the outer surface of the cleaning protrusion in the axial direction matches the inner wall of the valve body channel.

[0007] Optionally, the length of the cleaning protrusion exceeds the length of the valve body channel.

[0008] Optionally, the cleaning protrusion is provided with an injection head.

[0009] Optionally, the injection head is frustum-shaped.

[0010] Optionally, the material cleaning projection, the injection head, and the plunger body are coaxial rotating bodies.

[0011] Optionally, the flow channels are evenly distributed along the outer surface of the material cleaning projection.

[0012] Optionally, the flow channels are arc-shaped surfaces.

[0013] Optionally, the inner wall of the cavity at one end of the valve body passage where the material storage cylinder is located is bowl-shaped.

[0014] This application also provides a resin online modification and molding device, including a modification system and a molding system. The molding system further includes the injection device described in any one of the above.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: avoiding a porous structure, reducing the processing difficulty of the plunger, simple cleaning and not easily blocked during the material cleaning process, and improving the reliability of the device. Description of the Drawings

[0016] Figure 1 Structural schematic diagram of the injection device for the embodiment;

[0017] Figure 2 Structural schematic diagram of the plunger for Embodiment 1;

[0018] Figure 3 For Figure 2 Local enlarged view of area A in

[0019] Figure 4 Cross-sectional structural schematic diagram of the injection device for Embodiment 1;

[0020] Figure 5 Structural schematic diagram of the plunger for Embodiment 2;

[0021] Figure 6 For Figure 5 Local enlarged view of area B in

[0022] Figure 7 Cross-sectional structural schematic diagram of the injection device for Embodiment 2;

[0023] Figure 8 Structural schematic diagram of the resin online modification and molding device.

[0024] In the figure, the reference numerals are: 1 - nozzle, 2 - feed port, 3 - switching valve, 4 - valve body passage, 5 - material storage cylinder, 6 - plunger, 61 - plunger rod, 62 - plunger body, 63 - material cleaning projection, 64 - flow channel, 65 - propulsion platform, 66 - injection head, 7 - modification system, 8 - molding system. Detailed Embodiments

[0025] The specific implementation manners of the present application are elaborated in detail through the following embodiments. However, the specific implementation of the present application does not limit the technical solutions of the present application. Any non-substantive changes such as replacing common technical solutions in the art using the technical solutions described in the embodiments of the present application fall within the protection scope of the present application. Embodiment 1

[0026] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown in the injection device, which includes a nozzle 1, a feed port 2, a switching valve 3, a valve body passage 4, a storage cylinder 5, and a plunger 6. The plunger 6 includes a plunger rod 61 and a plunger body 62. The valve body passage 4 is a passage formed by connecting the feed port 2 and the storage cylinder 5. It is characterized in that a cleaning projection 63 is provided on the plunger body 62. A propulsion platform 65 adapted to the inner wall of the cavity at one end of the storage cylinder 5 in the valve body passage 4 is formed around the connection of the cleaning projection 63 and the plunger body 62. A flow channel 64 axially penetrating and connecting the propulsion platform 65 is provided on the outer surface of the cleaning projection 63. When the injection device starts to work, the switching valve 3 switches to the injection state, and the propulsion platform 65 moves towards the nozzle 1. Since the valve body passage 4 becomes narrower relative to the storage cylinder 5, a large pressure is generated between the propulsion platform 65 and the inside of the storage cylinder 5. The flow channel 64 on the cleaning projection 63 of the melt channel enters the valve body passage 4 and then is ejected through the nozzle 1 passage to achieve the purpose of cleaning the material.

[0027] The non-flow-channel 64 part of the outer surface of the cleaning projection 63 in the axial direction matches the inner wall of the valve body passage 4. The length of the cleaning projection 63 exceeds the length of the valve body passage 4. During the storage process before the injection stage, the melt enters the storage cylinder 5 through the feed port 2 and the valve body passage 4. After the storage is completed, it enters the injection stage. This process repeats. During the injection process, there will be residual material in the valve body passage 4 during the storage process. At this time, the melt in the valve body passage 4 is pushed into the nozzle 1 passage by the cleaning projection 63 with a length equivalent to that of the valve body passage 4. When the next working cycle is carried out, the melt in the nozzle 1 passage will be ejected, thus preventing the residual material from entering the storage cylinder 5 again in the valve body passage 4 and mixing with the newly entering melt in the storage cylinder 5 to affect the melt performance.

[0028] The flow channels 64 are evenly distributed along the outer surface of the cleaning projection 63 to ensure that the cleaning degree of each part is the same during the cleaning process. The flow channels 64 are arc-shaped surfaces to facilitate the flow of the melt. In other embodiments, they can also be channels of other shapes as long as the purpose of enabling the melt to flow can be achieved. The inner wall of the cavity at one end of the storage cylinder 5 in the valve body passage 4 is bowl-shaped. Similarly, in other embodiments, it can also be designed as the inner wall of other shapes, which should be understood by those skilled in the art. Embodiment 2

[0029] As Figure 5, Figure 6 and Figure 7 The injection device shown has basically the same structure as the injection device in Embodiment 1. The same parts will not be described in detail. The difference is that the material cleaning protrusion 63 is provided with an injection head 66. The injection head 66 is frustum-shaped. The presence of the injection head 66 provides a buffering effect for the melt, minimizing the influence on the melt caused by the structure of the device. The material cleaning protrusion 63, the injection head 66, and the plunger body 62 are coaxial rotating bodies. Embodiment 3

[0030] As Figure 8 shown, the resin in-line modification and molding equipment includes a modification system 7, a molding system 8, and also includes the injection device of Embodiment 1. Embodiment 4

[0031] As Figure 8 shown, the resin in-line modification and molding equipment includes a modification system 7, a molding system 8, and also includes the injection device of Embodiment 2.

[0032] It should be noted that for the components used in the above embodiments, those skilled in the art can select or replace them according to their needs, which does not exceed the protection scope of this application.

Claims

1. An injection device, comprising a nozzle, a feed port, a switching valve, a valve body passage, a material storage cylinder, and a plunger. The plunger includes a plunger rod and a plunger body. The valve body passage is a passage formed by connecting the feed port and the material storage cylinder, and is characterized in that, The plunger body is provided with a cleaning projection. Around the connection between the cleaning projection and the plunger body, a propulsion platform is formed, which is adapted to the inner wall of the cavity at one end of the valve body passage where the material storage cylinder is located. An axial through-flow channel connecting the propulsion platform is provided on the outer surface of the cleaning projection.

2. An injection device according to claim 1, wherein The non-channel part of the outer surface of the cleaning projection in the axial direction matches the inner wall of the valve body passage.

3. An injection device according to claim 1, characterized in that, The length of the cleaning projection exceeds the length of the valve body passage.

4. The injection device according to claim 1, characterized in that, The cleaning projection is provided with an injection head.

5. The injection device according to claim 4, characterized in that, The injection head is frustum-shaped.

6. The injection device according to claim 1, characterized in that, The cleaning projection, the injection head, and the plunger body are coaxial rotating bodies.

7. The injection device according to claim 1, characterized in that, The flow channels are evenly distributed along the outer surface of the cleaning projection.

8. The injection device according to claim 1, characterized in that, The flow channels are arc-shaped surfaces.

9. The injection device according to claim 1, characterized in that, The inner wall of the cavity at one end of the valve body passage where the material storage cylinder is located is bowl-shaped.

10. An on-line resin modification and molding device, comprising a modification system and a molding system, characterized in that, The molding system includes the injection device according to any one of claims 1 to 9.

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