Extrusion die cleaning furnace

Abstract

The utility model relates to an extrusion die cleaning furnace which comprises a furnace body and a furnace cover, a plurality of electromagnetic type knocking mechanisms are arranged on the outer side wall of the furnace body, each electromagnetic type knocking mechanism comprises a metal cylinder which is arranged in an upward inclined mode, the upper end and the lower end of each metal cylinder are open, and an electromagnet is fixedly installed at the lower end of each metal cylinder. The upper end of the metal cylinder is fixedly connected with the outer side wall of the furnace body; and a hollow magnetic ball is arranged in the metal cylinder. According to the extrusion die cleaning furnace, the structure of an existing vacuum cleaning furnace is optimally designed, the electromagnetic knocking mechanism is arranged and can knock and vibrate the outer side wall of the furnace body, so that carbon powder attachments attached to the inner wall of the furnace body are cracked and separated from the furnace wall, attachment of the carbon powder attachments to the furnace wall is reduced, and the service life of the furnace body is prolonged. And the subsequent regular cleaning difficulty is obviously reduced.

Description

Technical Field

[0001] The utility model relates to an extrusion die cleaning furnace and belongs to the technical field of die cleaning. Background Art

[0002] In the polymer plastic processing industry, after the extrusion operation is completed, solid plastic often adheres to the mold and is difficult to remove. The traditional method is to burn it, which is not environmentally friendly and easy to damage the mold. Therefore, nowadays, vacuum cleaning furnaces are mostly used to clean the mold.

[0003] The vacuum cleaning furnace uses the characteristics that high molecular polymers can be melted at about 300℃, can be cracked and coked in an air-tight environment at temperatures above 300℃, and can be completely oxidized in an environment with a small amount of air and a certain degree of vacuum at temperatures above 400℃. First, the mold with high molecular attachments is heated to melt, so that most of the molten material on the mold can flow to the bottom of the furnace and then be collected; then the furnace temperature is raised to 400-500℃, and the vacuum valve is opened and a small amount of air is introduced to fully oxidize the remaining molten material. The generated carbon dioxide is sucked out by a water ring vacuum pump after water spraying, and then separated by a gas-water separator and discharged out of the furnace. It can not only effectively remove the high molecular polymers on the mold without damaging the mold, but also the separated high molecular polymer recyclables can be recycled and reused for a second time, thus playing a role in environmental protection and energy saving.

[0004] However, after long-term use, a layer of carbon powder will adhere to the inner wall of the existing vacuum cleaning furnace, which needs to be cleaned regularly. Moreover, over time, the adhesion between the carbon powder and the furnace wall is very strong, making cleaning very difficult.

[0005] Based on this, the present utility model is proposed. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides an extrusion die cleaning furnace, and the specific technical scheme is as follows:

[0007] An extrusion mold cleaning furnace comprises a furnace body and a furnace cover. The outer wall of the furnace body is provided with a plurality of electromagnetic knocking mechanisms. The electromagnetic knocking mechanisms comprise a metal cylinder arranged in an upward tilted manner. The upper and lower ends of the metal cylinder are both open. An electromagnet is fixedly installed at the lower end of the metal cylinder. The upper end of the metal cylinder is fixedly connected to the outer wall of the furnace body. A hollow magnetic ball is arranged inside the metal cylinder.

[0008] As a further improvement, the hollow magnetic ball includes a hemispherical magnetic sphere body and a hemispherical semi-spherical shell, and the magnetic sphere body and the hemispherical shell are connected as a whole to form a spherical structure.

[0009] As a further improvement, the inner wall of the hemispherical shell is provided with a plurality of triangular grooves.

[0010] As a further improvement, the inner wall of the furnace body is composed of a mirror area and a rough area, the orthographic projection of the rough area is a regular hexagonal structure, and the rough areas are distributed in an array.

[0011] As a further improvement, the angle between the axial direction of the metal tube and the axial direction of the furnace body is β, 81°≤β≤88°.

[0012] As a further improvement, the electromagnetic knocking mechanisms are distributed in an array on the outer side wall of the furnace body.

[0013] As a further improvement, the outer side wall of the furnace body is provided with a plurality of electromagnetic knocking mechanism groups consisting of a plurality of electromagnetic knocking mechanisms, and the electromagnetic knocking mechanism groups are spirally arranged on the outer side wall of the furnace body.

[0014] The extrusion die cleaning furnace described in the utility model optimizes the structure of the existing vacuum cleaning furnace and provides an electromagnetic knocking mechanism, which can knock and vibrate the outer wall of the furnace body, thereby causing the carbon powder attachments attached to the inner wall of the furnace body to crack and separate from the furnace wall, reducing the attachment of carbon powder attachments to the furnace wall, and significantly reducing the difficulty of subsequent regular cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the extrusion die cleaning furnace described in Example 5;

[0016] Figure 2 It is a structural schematic diagram of the electromagnetic knocking mechanism of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the hollow magnetic ball of the utility model;

[0018] Figure 4 This is a schematic diagram of the interior of the hemispherical shell of the utility model;

[0019] Figure 5 It is a schematic diagram of the inner wall of the furnace body of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the extrusion die cleaning furnace described in Example 6. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1

[0025] like Figures 1 to 3 As shown, the extrusion die cleaning furnace comprises a furnace body 10 and a furnace cover 11. In this embodiment, a heating component and a spray component are arranged inside the extrusion die cleaning furnace, and the external vacuum pump, vacuum valve, gas-water separator, etc., as well as the furnace body 10, the furnace cover 11 and other components are all conventional components of the existing vacuum cleaning furnace, which are not the focus of protection of the present utility model and will not be described in detail here.

[0026] The key improvements of this utility model are as follows:

[0027] The outer wall of the furnace body 10 is provided with a plurality of electromagnetic knocking mechanisms 20, the upper and lower ends of the metal cylinder 21 are both open, an electromagnet 23 is fixedly installed at the lower end of the metal cylinder 21, and the upper end of the metal cylinder 21 is fixedly connected to the outer wall of the furnace body 10; a hollow magnetic ball 22 is provided inside the metal cylinder 21.

[0028] The hollow magnetic ball 22 includes a hemispherical magnetic sphere 221 and a hemispherical shell 222. The magnetic sphere 221 and the hemispherical shell 222 are connected as a whole to form a spherical structure. The metal cylinder 21 and the hemispherical shell 222 are preferably made of copper alloy.

[0029] When the electromagnet 23 is energized, it generates a magnetic force that repels the magnetic sphere 221, thereby causing the hollow magnetic sphere 22 to hit the outer wall of the furnace body 10 upward in the metal cylinder 21. The huge vibration generated by the collision can cause the carbon powder attached to the inner wall of the furnace body 10 to separate from the furnace wall. After that, the hollow magnetic sphere 22 falls to the lower end of the metal cylinder 21 under the action of gravity. After each extrusion mold cleaning, the electromagnetic knocking mechanism 20 can be used to knock the side wall of the furnace body 10 for 5 to 15 minutes, thereby reducing the attachment of carbon powder to the furnace wall and reducing the difficulty of subsequent regular cleaning.

[0030] In this embodiment, the key point is that the hollow magnetic ball 22 must be hollow and cannot be solid; otherwise, it is easy to cause the side that finally falls on the electromagnet 23 to be attracted by the electromagnet 23. In the present invention, due to the arrangement of the magnetic sphere 221 and the hemispherical shell 222, the center of gravity is inside the magnetic sphere 221, and each time the side that falls on the electromagnet 23 is almost repelled by the electromagnet 23; because when the hollow magnetic ball 22 falls on the electromagnet 23, due to elasticity and inertia, it will constantly bounce up and fall back, and finally due to magnetism, the magnetic sphere 221 will be adsorbed on the electromagnet 23 that is not powered on. Even if the hollow magnetic ball 22 is not corrected in time, at the next start, since the electromagnet 23 is generally powered on for only 1s and then powered off, this makes the furnace body 10 in the continuous vibration process, which will prompt the hollow magnetic ball 22 that is not corrected in time to finally correct.

[0031] Example 2

[0032] The angle between the axial direction of the metal cylinder 21 and the axial direction of the furnace body 10 is β, 81°≤β≤88°. To ensure that there is enough acceleration stroke in the metal cylinder 21 and that the hollow magnetic ball 22 has enough time to return to its normal position in the metal cylinder 21, β is preferably 86°.

[0033] Example 3

[0034] like Figure 4 As shown, the inner wall of the hemispherical shell 222 is provided with a plurality of triangular grooves 2221. The triangular grooves 2221 can be processed by integral casting, thereby improving the anti-impact deformation performance of the hemispherical shell 222.

[0035] Example 4

[0036] like Figure 5 As shown, the inner wall of the furnace body 10 is composed of a mirror area 101 and a rough area 102. The orthographic projection of the rough area 102 is a regular hexagonal structure, and the rough areas 102 are distributed in an array.

[0037] When the inner wall of the furnace body 10 is a uniform mirror surface, the adhesion force of the carbon powder attachment on the furnace wall will be very uniform, and the adhesion layer area formed by the carbon powder attachment will be very large. Once it reaches a certain level, it is not easy to fall off in a large area under the action of knocking and vibration.

[0038] In the present embodiment, the surface roughness Ra of the rough area 102 is 1 μm to 5 μm. This causes the adhesion layer formed on the inner wall of the furnace body 10 to quickly crack into small pieces and then fall off over a large area each time it is struck or vibrated. A very thick adhesion layer over a large area will not be formed.

[0039] As for the carbon powder remaining on the rough area 102, when it accumulates to a sufficient thickness next time and is struck and vibrated, it will fall off again.

[0040] Example 5

[0041] like Figure 1 As shown, the electromagnetic knocking mechanism 20 is distributed in an array on the outer wall of the furnace body 10. In this embodiment, the electromagnet 23 can generate magnetic force alternately, with a cycle of 5s; for example, the magnetic force that repels the hollow magnetic ball 22 is generated in the 1st second, and then the magnetic force that attracts the hollow magnetic ball 22 is generated in the 3rd second to urge the hollow magnetic ball 22 to return to the right position by 100%; the 2nd, 4th, and 5th seconds are all powered off.

[0042] Example 6

[0043] like Figure 6 As shown, the outer wall of the furnace body 10 is provided with a plurality of electromagnetic knocking mechanism groups 30 composed of a plurality of electromagnetic knocking mechanisms 20 , and the electromagnetic knocking mechanism groups 30 are spirally arranged on the outer wall of the furnace body 10 .

[0044] To cooperate with Example 4, it is found that the corresponding electromagnets 23 of all the electromagnetic knocking mechanisms 20 on each group of electromagnetic knocking mechanism groups 30 are synchronized (such as being energized at the same time); the corresponding electromagnets 23 of all the electromagnetic knocking mechanisms 20 on two adjacent groups of electromagnetic knocking mechanism groups 30 are not synchronized. In this way, the adhesion layer on the inner wall of the furnace body 10 can be subjected to uneven force when subjected to knocking vibration, thereby causing it to crack faster and accelerate the falling-off speed.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An extrusion die cleaning furnace, comprising a furnace body (10) and a furnace cover (11), characterized in that: The outer wall of the furnace body (10) is provided with a plurality of electromagnetic knocking mechanisms (20), the electromagnetic knocking mechanisms (20) comprising a metal cylinder (21) arranged in a downwardly inclined manner, the upper and lower ends of the metal cylinder (21) being open, an electromagnet (23) being fixedly mounted at the lower end of the metal cylinder (21), the upper end of the metal cylinder (21) being fixedly connected to the outer wall of the furnace body (10); and a hollow magnetic ball (22) being arranged inside the metal cylinder (21).

2. The extrusion die cleaning furnace according to claim 1, characterized in that: The hollow magnetic ball (22) comprises a hemispherical magnetic sphere (221) and a hemispherical semispherical shell (222), and the magnetic sphere (221) and the hemispherical shell (222) are connected as a whole to form a spherical structure.

3. The extrusion die cleaning furnace according to claim 2, characterized in that: The inner wall of the hemispherical shell (222) is provided with a plurality of triangular grooves (2221).

4. The extrusion die cleaning furnace according to claim 1, characterized in that: The inner wall of the furnace body (10) is composed of a mirror surface area (101) and a rough area (102); the orthographic projection of the rough area (102) is a regular hexagonal structure, and the rough areas (102) are distributed in an array.

5. The extrusion die cleaning furnace according to claim 1, characterized in that: The angle between the axial direction of the metal cylinder (21) and the axial direction of the furnace body (10) is β, and 81°≤β≤88°.

6. The extrusion die cleaning furnace according to claim 1, characterized in that: The electromagnetic knocking mechanisms (20) are distributed in an array on the outer side wall of the furnace body (10).

7. The extrusion die cleaning furnace according to claim 1, characterized in that: The outer wall of the furnace body (10) is provided with a plurality of electromagnetic knocking mechanism groups (30) composed of a plurality of electromagnetic knocking mechanisms (20), and the electromagnetic knocking mechanism groups (30) are spirally arranged on the outer wall of the furnace body (10).

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