chafing core

Abstract

This utility model relates to the field of sheath manufacturing technology, and in particular to an anti-friction mold core, including a mold core body. The mold core body has an outwardly protruding mold nozzle at the discharge port position. An annular expansion groove communicating with the interior of the mold core body is formed on the inner side of the mold nozzle. A transition groove is provided between the annular expansion groove and the interior of the mold core body. The anti-friction mold core of this utility model reduces the bearing diameter length to 6mm, and then sets an annular expansion groove of about 4mm from the outside to the inside. The transition groove communicating with the interior of the mold core body can avoid direct rubbing against the grinding joint, making the heating more uniform and improving safety. The transition groove can be a 1mm radius arc or a 1mm 45° chamfer, which makes the processing methods more diverse and the application scenarios wider.

Description

Technical Field

[0001] This utility model relates to the field of sheath production technology, and in particular to an anti-friction mold core. Background Technology

[0002] During the tube extrusion process, die rubbing can occur, carrying away the temperature of the die nozzle in the diameter bearing area. This leads to uneven heating of the material on the entire ring, potentially causing small bumps or even tearing. While the market typically addresses this by applying a heat-insulating layer of material, the effect remains quite limited. Utility Model Content

[0003] The technical problem this invention aims to solve is that during the current tube extrusion production process, there is a risk of die rubbing, resulting in uneven heating and even tearing.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an anti-scrubbing mold core, including a mold core body, the mold core body having an outwardly protruding mold nozzle at the discharge port position, an annular expansion groove communicating with the interior of the mold core body on the inner side of the mold nozzle, and a transition groove communicating with the interior of the mold core body.

[0005] The transition groove can be a 1mm radius arc or a 1mm 45° chamfer.

[0006] The mold core body is axially fixed with a side-mounted connecting end away from the mold nozzle end.

[0007] The mold core body has a tapered internal material guide channel inside for connecting the mold nozzle and the side connection end.

[0008] An annular limiting groove is provided on the outer arc-shaped surface of the side-mounted connecting end.

[0009] The side-mounted connection end is provided with an arc-shaped material guide groove near the connection end of the conical internal material guide channel.

[0010] The beneficial effects of this utility model are: (1) The anti-scrubbing mold core of this utility model reduces the bearing diameter length to 6mm and sets an annular expansion groove about 4mm from the outside to the inside. A transition groove is provided in the expansion groove and the inside of the mold core body, which can avoid directly rubbing the grinding joint, making the heating more uniform and improving safety. (2) The transition groove can be made of a 1mm radius arc or a 1mm 45° chamfer, making the processing methods more diverse and applicable to a wider range of scenarios. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0014] Figure 3 This is a partial schematic diagram of the transition groove with a chamfer in this utility model.

[0015] Figure 4 This is a partial schematic diagram of the transition groove in this utility model, which uses a circular arc. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Figure 1 and Figure 2 The anti-scratch mold core shown includes a mold core body 1. The mold core body 1 has an outwardly protruding mold nozzle 2 at the discharge port position. An annular expansion groove 3 that communicates with the interior of the mold core body 1 is provided on the inner side of the mold nozzle 2. A transition groove 4 that communicates with the interior of the mold core body 1 is provided between the annular expansion groove 3 and the interior of the mold core body 1.

[0019] like Figure 3 and Figure 4 The transition groove 4 shown can be a 1mm radius arc or a 1mm 45° chamfer for easy processing.

[0020] To facilitate the end connection, the mold core body 1 has a side-mounted connection end 5 axially fixed at the end away from the mold nozzle 2.

[0021] To facilitate internal connectivity, the mold core body 1 is provided with a tapered internal material guide channel 11 for connecting the mold nozzle 2 and the side connection end 5.

[0022] To accommodate external assembly and positioning, an annular positioning groove 51 is provided on the outer arc-shaped surface of the side-mounted connecting end 5.

[0023] The buckle is inserted into the annular limiting slot 51 to fix it to the side connecting end 5.

[0024] To reduce internal resistance, the side-mounted connection end 5 is provided with an arc-shaped material guide groove 52 near the connection end of the conical internal material guide channel 11.

[0025] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A scratch-resistant mold core, comprising a mold core body (1), characterized in that: The mold core body (1) has an outwardly protruding mold nozzle (2) at the discharge port position. An annular expansion groove (3) communicating with the inside of the mold core body (1) is provided on the inner side of the mold nozzle (2). A transition groove (4) is provided between the annular expansion groove (3) and the inside of the mold core body (1).

2. The anti-scuff core according to claim 1, characterized in that: The transition groove (4) can be a 1mm radius arc or a 1mm 45° chamfer.

3. The anti-scuff core according to claim 1, characterized in that: The mold core body (1) has a side-mounted connecting end (5) axially fixed at the end away from the mold nozzle (2).

4. The anti-scuff core according to claim 3, characterized in that: The mold core body (1) is provided with a conical internal material guide channel (11) for connecting the mold nozzle (2) and the side connection end (5).

5. The anti-scuff core according to claim 3, characterized in that: The side-mounted connecting end (5) has an annular limiting groove (51) on its outer arc surface.

6. The anti-scuff core according to claim 4, characterized in that: The side-mounted connecting end (5) is adjacent to the conical internal material guide channel (11) and the connecting end is provided with an arc-shaped material guide groove (52).

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