Wire extrusion molding die

Abstract

The utility model discloses a kind of wire rod extrusion forming die head, including mutually detachable die head and die body, the die body at least two feed channels and an extrusion channel, feed channel and extrusion channel between being provided with separate guide seat to separate, separate guide seat is through with multiple independent discharge channels, each described feed channel and discharge channel one-to-one, the die head part of extrusion channel outside is equipped with extrusion outlet, extrusion outlet is designed into oval shape.The utility model designs extrusion outlet into micro-oval, and then form "speed anchor" between extrusion channel to extrusion outlet, i.e. slow in short axis area naturally, long axis area is pulled back, the speed of wire rod of different color is locked, the wire rod of multicolor melt layer is forced to synchronize in mould, no longer slip, while, the shape of wire rod outside is adapted extrusion outlet, outer edge forms slightly flat, more difficult to appear multicolor wire rod extrusion color mixing problem.

Description

Technical Field

[0001] This utility model relates to the field of wire processing technology, specifically to a wire extrusion molding die. Background Technology

[0002] 3D printing is a technology that constructs three-dimensional objects by printing layer by layer using powdered materials such as metal or plastic based on digital models. Specifically, 3D printers using FDM technology supply thermoplastic filaments to the hot end via a feeding mechanism, where the filaments are heated to a molten state. For multi-color 3D printing, different colored filaments are combined, melted, and extruded during the printing process. Current technologies generally employ annular flow channels, where the velocity difference between the high-viscosity color layer and the low-viscosity matrix layer is axially symmetrical. This circular, symmetrical design without anchor points allows different filament color layers to freely rotate, easily leading to slippage and color mixing / uniform color. Any slippage at any point will amplify synchronously along the 360° circumference, resulting in spiral color band misalignment and ultimately significant color differences, especially in multi-color filament extrusion applications.

[0003] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a wire extrusion die head, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a wire extrusion die head, comprising a detachable die head and a die body, wherein the die body has at least two feeding channels and one extrusion channel, and a guide seat is provided between the feeding channel and the extrusion channel to separate them. The guide seat is provided with multiple independent discharge channels, and each feeding channel is connected to the discharge channel. The die head portion outside the extrusion channel is provided with an extrusion port, which is designed to be elliptical.

[0008] Preferably, the extrusion channel of the die body is located on the front side of the guide seat, and the extrusion channel serves as a transition section where wires converge.

[0009] Preferably, the guide seat has three discharge channels, through which wires of different colors are introduced.

[0010] Preferably, the extrusion port is slightly elliptical, the shape of the wire melt layer at the contact position is adapted to the extrusion port, and a flat shape is formed on the outer peripheral wall.

[0011] (III) Beneficial Effects

[0012] After adopting the above technical solution, this utility model has the following advantages compared with the prior art: The wire extrusion molding die of this utility model specifically improves the design of the circular extrusion port into a micro-ellipse. The specific position of the ellipse can be deflected, thereby forming a "speed anchor" between the extrusion channel and the extrusion port. That is, the short axis area naturally runs slower, and the long axis area is pulled back. The speed of wires of different colors is locked, and the multi-color melt layer wires are forced to synchronize in the die and no longer slip. At the same time, the shape of the outer side of the wire is adapted to the extrusion port and has a slightly flat shape (non-circular cross-section), which makes it less likely to cause color mixing / uneven color in the extrusion of multi-color wires. Attached Figure Description

[0013] Figure 1 This is a side sectional view of the present invention;

[0014] Figure 2 This utility model Figure 1 Schematic diagram of the cross section at point aa;

[0015] Figure 3 This utility model Figure 1 A schematic diagram of the change in cross-section at point aa.

[0016] In the diagram: 1. Die head; 2. Die body; 3. Guide seat; 4. Feed channel; 5. Extrusion port; 6. Extrusion channel; 7. Discharge channel. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 As shown: A wire extrusion die includes a detachable die head 1 and a die body 2. The die body 2 has at least two feed channels 4 and one extrusion channel 6. A guide seat 3 is provided between the feed channels 4 and the extrusion channel 6 to separate them. The guide seat 3 has a circular longitudinal section and is permeated by multiple independent discharge channels 7. The feed channels 4 are located on the rear side of the die head 1 and are provided independently in multiple ways, wherein each feed channel 4 communicates with each discharge channel 7.

[0019] The extrusion channel 6 of the die body 2 is located on the front side of the guide seat 3. This extrusion channel 6 serves as a transition section where wires intersect, enabling the simultaneous extrusion of multiple sets of wire cores of different colors.

[0020] Different colored molten wires are extruded into the four feeding channels by external spirals.

[0021] As attached Figure 2-3 As shown, this embodiment has a guide seat 3 with 3 discharge channels 7 according to the production design, and the dotted line part is circular.

[0022] Because the circular extrusion orifice is symmetrical in all directions and has no anchor points, different wire color layers can freely rotate around each other, easily leading to slippage and color mixing / uneven color. Therefore, the extrusion port 5 (connecting to the inner partial inner wall) of the die head 1 on the outer side of the extrusion channel 6 is designed as a micro-ellipse (i.e., an ellipse whose major axis and minor axis are close to a circle). This forces the multi-color molten layers (wires) to synchronize within the die during extrusion, preventing slippage. The micro-ellipse allows the molten layers to form a "speed anchor," meaning the short axis region naturally runs slower, while the long axis region is pulled back, making it easier to lock the speed of different colored wires.

[0023] Secondly, the outer shape of the wire is adapted to the extrusion port 5, and has a slightly flattened shape (non-circular cross-section), which makes it less prone to circumferential slippage during axial extrusion and avoids the problem of color mixing / uneven color in multi-color wire extrusion.

[0024] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A wire extrusion die, comprising a detachable die head and a die body, characterized in that: The die body has at least two feeding channels and one extrusion channel. A guide seat is provided between the feeding channel and the extrusion channel to separate them. The guide seat is connected by multiple independent discharge channels. Each feeding channel is connected to the discharge channel. The die head part outside the extrusion channel is provided with an extrusion port, which is designed to be elliptical.

2. The wire extrusion die according to claim 1, characterized in that: The extrusion channel of the die body is located on the front side of the guide seat, and this extrusion channel serves as a transition section where wires converge.

3. The wire extrusion die according to claim 1, characterized in that: The guide seat has three discharge channels, through which wires of different colors are fed.

4. The wire extrusion die according to claim 1, characterized in that: The extrusion port is slightly elliptical, and the shape of the wire melt layer at the contact position is adapted to the extrusion port, forming a flat shape on the outer peripheral wall.

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