A sheath vacuum pumping device based on cable core

Abstract

The present invention discloses a sheath vacuuming device based on a cable core, comprising a base provided with an inlet, the base being connected with an inner mold base and a vacuuming positioning tube in sequence from the outside to the inside, a gap being left between the inner mold base and the vacuuming positioning tube, a through hole being provided on a side wall of the inner mold base close to the base, a connecting tube being provided in the through hole, an inner mold being connected to one end of the inner mold base away from the base, and an outlet being provided at one end of the inner mold away from the inner mold base. The present invention discloses a sheath vacuuming device based on a cable core, which achieves a better vacuuming effect through the reasonable layout of vacuuming and the inner mold base, as well as the ladder-shaped structure of the inner mold, and at the same time makes the negative pressure value of the inner mold area greater than that of other areas, creating a better environment for the next process of tightly wrapping the molten plastic on the cable core.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cables, and in particular relates to a sheath vacuum pumping device based on a cable core. Background Art

[0002] The existing sheath vacuum pumping device has poor air extraction effect. At the same time, the overall structure needs to customize different sealing rings for different cable cores. At the same time, poor sealing may cause the entry of outside air. At the same time, during the air extraction process, it cannot be guaranteed that the negative pressure in the inner mold area is greater than the negative pressure in other areas. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a sheath vacuum pumping device based on a cable core in view of the deficiencies of the above-mentioned prior art.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0005] A sheath vacuum device based on a cable core, which includes: a base provided with an inlet, an inner mold base and a vacuum positioning tube are connected to the base in sequence from the outside to the inside, a gap is left between the inner mold base and the vacuum positioning tube, a through hole is provided on the side wall of the inner mold base close to the base, a connecting tube is provided in the through hole, an end of the inner mold base away from the base is connected to the inner mold, and an outlet is provided at the end of the inner mold away from the inner mold base.

[0006] To optimize the above technical solutions, the specific measures taken also include:

[0007] Furthermore, the inlet and the outlet are both circular, the aperture of the inlet is larger than the aperture of the outlet, and the centers of the circles are on the same horizontal line.

[0008] Furthermore, the inner mold is a trapezoidal structure with a larger left side and a smaller right side.

[0009] Furthermore, a gap is left between the inner mold and the side of the vacuum positioning tube away from the base.

[0010] Furthermore, the connecting tube is threadedly connected to the inner mold base, the inner mold base is threadedly connected to the pedestal, and the vacuum positioning tube is threadedly connected to the pedestal.

[0011] Furthermore, the connecting pipe is provided with an external thread, and is connected and fixed to an external air pump via the external thread.

[0012] Beneficial effects of the present invention:

[0013] The present invention discloses a sheath vacuum pumping device based on a cable core. The vacuum pumping effect is better through the reasonable layout of the vacuum pumping and the inner mold base and the ladder structure of the inner mold. At the same time, the negative pressure value of the inner mold area is greater than that of other areas, thereby creating a better environment for the next process of tightly wrapping the molten plastic on the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] The reference numerals are: inlet 1, base 2, inner mold base 3, vacuum positioning tube 4, connecting tube 5, inner mold 6, outlet 7. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0017] like Figure 1 As shown, the present invention is a sheath vacuum extraction device based on a cable core, comprising a base 2 provided with an inlet 1, on which an inner mold base 3 and a vacuum positioning tube 4 are threadedly connected in sequence from the outside to the inside, a gap is left between the inner mold base 3 and the vacuum positioning tube 4, a through hole is provided on the side wall of the inner mold base 3 close to the base 2, a connecting tube 5 is threadedly connected to the through hole, and the connecting tube 5 is provided with an external thread, which is connected and fixed to an external vacuum pump through the external thread.

[0018] The inner mold base 3 is connected to the inner mold 6 at one end away from the base 2. The inner mold 6 is a trapezoidal structure with a larger left side and a smaller right side. A gap is left between the side of the vacuum positioning tube 4 away from the base 2 and the inner mold 6. The inner mold 6 is provided with an outlet 7 at one end away from the inner mold base 3, wherein the inlet 1 and the outlet 7 are both circular, the aperture of the inlet 1 is larger than the aperture of the outlet 7, and the centers of the circles are on the same horizontal straight line, so that the cable core can maintain a horizontal and straight state.

[0019] The method of use of the present invention is as follows:

[0020] The inner mold area is divided into area I, the inner area of ​​the vacuum positioning tube 4 is divided into area III, and the gap between the vacuum positioning tube 4 and the inner mold base 3 is divided into area II. First, the vacuum pump is connected to the external thread of the connecting tube 5 for vacuuming. The gases that are vacuumed are the inlet, area III, area I, area II and through hole in sequence, which increases the resistance of external gas entering the cavity and reduces the amount of air leaking into the cavity per unit time. The negative pressure of area I is increased.

[0021] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A sheath vacuum pumping device based on a cable core, characterized in that: The invention comprises a base (2) provided with an inlet (1), the base (2) being connected with an inner mold base (3) and a vacuum positioning tube (4) in sequence from the outside to the inside, a gap being left between the inner mold base (3) and the vacuum positioning tube (4), a through hole being provided on a side wall of the inner mold base (3) close to the base (2), a connecting tube (5) being provided in the through hole, an inner mold (6) being connected to an end of the inner mold base (3) away from the base (2), an outlet (7) being provided at an end of the inner mold (6) away from the inner mold base (3); the inlet (1) and the outlet (7) being both circular, the aperture of the inlet (1) being larger than the aperture of the outlet (7), and the centers of the circles being on the same horizontal straight line; the inner mold (6) being a trapezoidal structure with a larger left side and a smaller right side; A gap is left between the side of the vacuum positioning tube (4) away from the base (2) and the inner mold (6); the connecting tube (5) is threadedly connected to the inner mold base (3), the inner mold base (3) is threadedly connected to the base (2), and the vacuum positioning tube (4) is threadedly connected to the base (2).

2. A cable core-based sheath vacuuming device according to claim 1, characterized in that: The connecting pipe (5) is provided with an external thread and is connected and fixed to an external air pump via the external thread.

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