Production die head of wave-absorbing material for extrusion
By designing the die for extrusion absorbent material production, adjusting the spacing between the extrusion head and the core, and combining the electromagnetic coil and cemented carbide layer, the problems of low magnetic permeability and unstable production process in the existing absorbent material production process are solved, and flexible adjustment of the thickness of the absorbent material and improving the production efficiency are achieved.
Patent Information
- Application Number
- CN202421007068.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In the existing production process of absorbent materials, the wet coating method has the problem of solvent contamination, while the products produced by the dry calendering method have low magnetic permeability and are prone to interruption in the production process.
A die for extrusion absorbent material production is designed. The thickness of the extruded absorbent material is adjusted by adjusting the spacing between the movable extrusion head and the iron core. Combined with the design of the electromagnetic coil and the cemented carbide layer, the magnetic permeability and production efficiency are improved.
It realizes flexible adjustment of the thickness of the wave absorbing material, avoids the disadvantages of wet and dry processes, improves magnetic permeability and production efficiency, is simple to operate, and saves costs.
Smart Images
Figure CN222554344U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electromagnetic interference and heat-conducting material production, in particular to a die head for extruding wave-absorbing materials. Background Art
[0002] With the rapid development of information technology, electronic exhibits are developing towards high frequency, miniaturization and integration, and electromagnetic interference and electromagnetic radiation pollution are becoming more and more serious. Absorbing materials can absorb electromagnetic waves incident on their surface and convert them into heat energy or other forms of energy, which can effectively solve the problems of electromagnetic interference and electromagnetic radiation pollution. At present, there are two main production processes for absorbing materials: 1. Wet coating method, coating a single layer or multi-layer lamination of the drying film and hot pressing and cross-linking, the product produced has high magnetic permeability, but the production process requires the use of solvents, which causes certain pollution to the environment, and requires more equipment for production; 2. Dry calendering method, with high production efficiency, but the product has low magnetic permeability, and it is easy to stick to the roller and break when producing thin sheets, and production is easy to be interrupted.
[0003] Therefore, the applicant has designed a die head for extruding absorbing materials after many experiments. Utility Model Content
[0004] The utility model aims to provide a die head for producing extruded absorbing materials. The device provided by the utility model can adjust the thickness of the extruded absorbing material by adjusting the interval between the movable extrusion head and the iron core, thereby avoiding the disadvantages of the wet coating method and the dry calendering method, being simple to operate and saving costs.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A die head for producing extruded wave absorbing materials comprises a fixed die, a movable die and an electromagnetic coil. The fixed die comprises a fixed die fixing plate, an extruder fixing plate, fastening bolts and a heating ring. The heating ring is installed outside the fixed die fixing plate.
[0007] The electromagnetic coil is composed of a coil and an iron core, the iron core is a flange structure, the iron core is located on the inner side of the fixed die fixing plate, and the iron core and the fixed die fixing plate are connected and fixed to the extruder fixing plate by common fastening bolts.
[0008] The movable die is composed of a movable extrusion head and a movable bolt, and the movable extrusion head is connected and fixed to the extruder fixing plate through the movable bolt.
[0009] The movable extrusion head is a conical structure. When the movable bolt is tightened, the gap between the movable extrusion head and the iron core becomes smaller; when the movable bolt is loosened, the gap between the movable extrusion head and the iron core becomes larger. The gap between the movable extrusion head and the iron core is adjusted by adjusting the tightness of the movable bolt, and the absorbing material is extruded from the gap between the movable extrusion head and the iron core. When the gap between the movable extrusion head and the iron core becomes smaller, the extruded absorbing material is thinner, and when the gap between the movable extrusion head and the iron core becomes larger, the extruded absorbing material is thicker.
[0010] Furthermore, a hard alloy layer is provided on the outer surface of the movable extrusion head.
[0011] Furthermore, the iron core is a silicon steel rod, and a hard alloy layer is arranged on the inner side of the iron core.
[0012] Furthermore, a coil is arranged at the front end of the iron core, the coil is wound on the iron core, and the coil is an enameled wire. The diameter of the enameled wire ranges from 0.1 to 1.5 mm, preferably from 0.5 to 0.8 mm. The number of turns of the coil wound on the iron core is 10 to 100, preferably from 30 to 50.
[0013] Furthermore, the coil is wound on the iron core and fixed by laying an epoxy resin layer.
[0014] The coil is further connected to a DC power supply, and the magnitude of the current can be adjusted.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] (1) The utility model electroplates a hard alloy layer at the part where the extrusion die head contacts the extruded material, thereby ensuring the service life of the extrusion head;
[0017] (2) The utility model designs a magnetic field orientation device in the extrusion head, which can improve the magnetic permeability of the extruded absorbing material;
[0018] (3) The thickness of the traditional die head cannot be adjusted, and different thicknesses require different dies. The utility model can adjust the thickness of the extruded absorbing material by adjusting the interval between the movable extrusion head and the iron core, which is simple to operate and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The figure is a schematic diagram of the structure of a die head for producing extruded absorbing materials. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] like Figure 1 As shown, a die head for producing extruded absorbing materials includes: a fixed die, a movable die and an electromagnetic coil. The fixed die includes a fixed die fixing plate 2, an extruder fixing plate 3, fastening bolts 4 and a heating ring 1. The heating ring 1 is installed on the outside of the fixed die fixing plate 2.
[0022] The electromagnetic coil is composed of a coil 5 and an iron core 8, the iron core 8 is a flange structure, the iron core 8 is located on the inner side of the fixed mold fixing plate 2, the iron core 8 and the fixed mold fixing plate 2 are connected and fixed to the extruder fixing plate 3 by a common fastening bolt 4; the movable mold is composed of a movable extrusion head 7 and a movable bolt 6, and the movable extrusion head 7 is connected and fixed to the extruder fixing plate 3 by the movable bolt 6.
[0023] The movable extrusion head 7 is a conical structure. When the movable bolt 6 is tightened, the gap between the movable extrusion head 7 and the iron core 8 becomes smaller; when the movable bolt 6 is loosened, the gap between the movable extrusion head 7 and the iron core 8 becomes larger. The gap between the movable extrusion head 7 and the iron core 8 is adjusted by adjusting the tightness of the movable bolt 6.
[0024] The outer surface of the movable extrusion head 7 is provided with a hard alloy layer.
[0025] The iron core 8 is a silicon steel rod, and a hard alloy layer is arranged on the inner side of the iron core 8 .
[0026] A coil 5 is disposed at the front end of the iron core 8 . The coil 5 is wound around the iron core 8 and is an enameled wire.
[0027] The diameter of the enameled wire is in the range of 0.1-1.5 mm, preferably 0.5-0.8 mm. In this embodiment, the enameled wire with a diameter of 0.8 mm is selected.
[0028] The number of turns of the coil 5 wound around the iron core 8 is 10-100, preferably 30-50. In this embodiment, the number of turns of the enameled wire selected is 100.
[0029] The coil 5 is wound on the iron core 8 and fixed by laying an epoxy resin layer.
[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A die head for producing an extruded wave absorbing material, comprising: The fixed mold, the movable mold and the electromagnetic coil are characterized in that: the fixed mold comprises a fixed mold fixing plate (2), an extruder fixing plate (3), a fastening bolt (4) and a heating ring (1), and the heating ring (1) is installed on the outside of the fixed mold fixing plate (2); The electromagnetic coil is composed of a coil (5) and an iron core (8), the iron core (8) is a flange structure, the iron core (8) is located on the inner side of the fixed die fixing plate (2), and the iron core (8) and the fixed die fixing plate (2) are connected and fixed to the extruder fixing plate (3) by a common fastening bolt (4); The movable die is composed of a movable extrusion head (7) and a movable bolt (6), and the movable extrusion head (7) is connected and fixed to the extruder fixing plate (3) via the movable bolt (6).
2. A die head for producing extruded absorbing materials according to claim 1, characterized in that: The movable extrusion head (7) is a conical structure. When the movable bolt (6) is tightened, the gap between the movable extrusion head (7) and the iron core (8) becomes smaller; when the movable bolt (6) is loosened, the gap between the movable extrusion head (7) and the iron core (8) becomes larger. The gap between the movable extrusion head (7) and the iron core (8) can be adjusted by adjusting the tightness of the movable bolt (6).
3. A die head for producing extruded microwave absorbing materials according to claim 1, characterized in that: The outer surface of the movable extrusion head (7) is provided with a hard alloy layer.
4. A die head for producing extruded microwave absorbing materials according to claim 1, characterized in that: The iron core (8) is a silicon steel rod, and a hard alloy layer is arranged on the inner side of the iron core (8).
5. The die head for producing extruded microwave absorbing materials according to claim 1, characterized in that: A coil (5) is arranged at the front end of the iron core (8), the coil (5) is wound around the iron core (8), and the coil (5) is an enameled wire.
6. A die head for producing extruded microwave absorbing materials according to claim 5, characterized in that: The diameter of the enameled wire is in the range of 0.1-1.5 mm.
7. The die head for producing extruded absorbing materials according to claim 5, characterized in that: The number of turns of the coil (5) wound around the iron core (8) is 10-100.
8. A die head for producing extruded microwave absorbing materials according to claim 7, characterized in that: The coil (5) is wound on the iron core (8) and fixed by laying an epoxy resin layer.