A sheath multi-color strip extrusion device and extrusion method

Abstract

The present invention discloses a sheath multi-color strip extrusion device, including an extruder head, the end of the extruder head is an extrusion channel of a truncated cone structure with a larger bottom and a smaller top, a diverter is provided on the end outer shell of the extruder head, the diverter is provided with a through hole, the through hole is in contact with the extrusion channel at the upper end of the extruder head, and a plurality of mutually independent injection holes are opened on the side wall of the diverter, and the injection holes penetrate the side wall of the diverter and are connected with the through hole. The present invention discloses a sheath multi-color strip extrusion device, which simultaneously extrude injection plastic and plastics of various colors as color strips through the diverter, and now has a longer service life than the prior art solution of spraying or stamping color strips, and the color strips have zero color difference, and the color strips are perfectly integrated with the sheath, so that the optical cable sheath meets the overall wear resistance requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cables, and in particular relates to a sheath multi-color strip extrusion device and an extrusion method. Background Art

[0002] In the prior art, the color stripes on the sheath are formed by coding or mechanical pressing so that the color stripes are attached to the surface of the sheath. The color stripes made by this method have a short life and are not wear-resistant. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a sheath multi-color strip extrusion device 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 multi-color strip extrusion device, which includes an extruder head, the end of the extruder head is an extrusion channel of a truncated cone structure with a larger bottom and a smaller top, an outer mold is arranged on the outer sleeve of the end of the extruder head, the outer mold is provided with a through hole, the through hole is in contact with the extrusion channel at the upper end of the extruder head, and a plurality of independent injection holes are opened on the side wall of the outer mold, and the injection holes penetrate the side wall of the outer mold and are connected with the through holes.

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

[0007] Furthermore, the direction of the injection hole is obliquely upward, and the injection hole includes a first injection hole and a second injection hole.

[0008] Furthermore, the first injection hole and the second injection hole are both rectangular structures, the width of the first injection hole is smaller than the width of the second injection hole, and the height of the first injection hole is equal to the height of the second injection hole.

[0009] Furthermore, the outer mold side wall is provided with an upper dividing groove and a lower dividing groove, the first injection hole is located in the upper dividing groove, and the second injection hole is located in the lower dividing groove.

[0010] Furthermore, the inlets of the first injection hole and the second injection hole are not located in the same vertical plane in the vertical direction, the outlets of the first injection hole and the second injection hole are located in the same vertical plane in the vertical direction, and their center lines are located on the same straight line.

[0011] Furthermore, the outer mold is threadedly connected to the extruder head.

[0012] Furthermore, the diameter of the through hole of the outer die is equal to the diameter of the small end of the extrusion channel, and the centers of the circles are located on the same straight line.

[0013] A method for extruding multi-color strips of a sheath, comprising the following steps:

[0014] Step S1: extruding the black sheath material upward from the extrusion channel of the extruder head;

[0015] Step S2: introducing colored plastic from the second injection hole so that the plastic covers the surface of the black sheath material to form a first layer of color stripes;

[0016] Step S3: injecting colored plastic into the first injection hole so that the plastic covers the first layer of color stripes to form a second layer of color stripes.

[0017] Furthermore, the first layer of color stripes and the second layer of color stripes form ABA-type color stripes.

[0018] Beneficial effects of the present invention:

[0019] The present invention discloses a sheath multi-color strip extrusion device and method, wherein plastic material and plastics of various colors as color strips are simultaneously extruded through an external mold, and compared with the prior art solution of spraying or stamping color strips, the service life of the sheath multi-color strip extrusion device and method is longer, the color strips have zero color difference, the color strips are perfectly integrated with the sheath, and the optical cable sheath achieves the overall wear resistance requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of the present invention;

[0021] Figure 2 It is a schematic diagram of the outer mold structure of the present invention.

[0022] The reference numerals are: extruder head 1 , extrusion channel 2 , outer mold 3 , through hole 4 , first injection hole 5 , second injection hole 6 , upper dividing groove 7 , lower dividing groove 8 . DETAILED DESCRIPTION

[0023] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 As shown, the present invention is a sheath multi-color strip extrusion device, including an extruder head 1, the end of the extruder head 1 is an extrusion channel 2 with a truncated cone structure that is larger at the bottom and smaller at the top, the outer side of the extruder head 1 is threadedly connected to an outer die 3, a through hole 4 is provided in the middle of the outer die 3, the through hole 4 is in contact with the extrusion channel 2 at the upper end of the extruder head 1, the aperture of the through hole 4 of the outer die 3 is equal to the diameter of the small end of the extrusion channel 2, and the center of the circle is located on the same straight line.

[0025] A plurality of independent injection holes are provided on the side wall of the outer mold 3, and the injection holes penetrate the side wall of the outer mold 3 and are connected with the through hole 4. The direction of the injection holes is obliquely upward, and the injection holes include a first injection hole 5 and a second injection hole 6. An upper separating groove 7 and a lower separating groove 8 are provided on the side wall of the outer mold 3. The function of the upper separating groove 7 and the lower separating groove 8 is to separate the sheath material and the color strip material before forming the sheath. The first injection hole 5 is located in the upper separating groove 7, and the second injection hole 6 is located in the lower separating groove 8. At the same time, an arc-shaped processing hole is provided on the upper separating groove 7 to facilitate the processing of parts. The inlets of the first injection hole 5 and the second injection hole 6 are not in the same vertical plane in the vertical direction, and the outlets of the first injection hole 5 and the second injection hole 6 are in the same vertical plane in the vertical direction, and their center lines are on the same straight line.

[0026] A method for extruding multi-color strips of a sheath, comprising the following steps:

[0027] Step S1: extruding the black sheath material upward from the extrusion channel 2 of the extruder head 1;

[0028] Step S2: injecting colored plastic from the second injection hole 6 so that the plastic covers the surface of the black sheath material to form a first layer of color stripes;

[0029] Step S3: injecting colored plastic into the first injection hole 5 so that the plastic covers the first layer of color stripes to form a second layer of color stripes.

[0030] The first layer of color stripes and the second layer of color stripes form ABA-type color stripes.

[0031] 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 multi-color strip extrusion device, characterized in that: The invention comprises an extruder head (1), wherein a truncated cone-shaped extrusion channel (2) which is smaller at the top and larger at the bottom is arranged inside the extruder head (1), an outer mold (3) is arranged on the outer sleeve of the end of the extruder head (1), and the outer mold (3) is provided with a through hole (4), and the through hole (4) is in contact with the extrusion channel (2) at the upper end of the extruder head (1), and a plurality of mutually independent injection holes are opened on the side wall of the outer mold (3), and the injection holes penetrate the side wall of the outer mold (3) and are connected with the through hole (4); The injection holes are oriented obliquely upward, and include a first injection hole (5) and a second injection hole (6); The first injection hole (5) and the second injection hole (6) are both rectangular structures, the width of the first injection hole (5) is smaller than the width of the second injection hole (6), and the height of the first injection hole (5) is equal to the height of the second injection hole (6); The side wall of the outer mold (3) is provided with an upper partition groove (7) and a lower partition groove (8), the first injection hole (5) is located in the upper partition groove (7), and the second injection hole (6) is located in the lower partition groove (8); The inlets of the first injection hole (5) and the second injection hole (6) are not located in the same vertical plane in the vertical direction, and the outlets of the first injection hole (5) and the second injection hole (6) are located in the same vertical plane in the vertical direction, and their center lines are located on the same straight line; The outer die (3) is threadedly connected to the extruder head (1); the diameter of the through hole (4) of the outer die (3) is equal to the diameter of the small end of the extrusion channel (2), and the centers of the circles are located on the same straight line.

2. The extrusion method of the sheath multi-color strip extrusion device according to claim 1, comprising the following steps: Step S1: extruding the black sheath material upward from the extrusion channel (2) of the extruder head (1); Step S2: introducing colored plastic from the second injection hole (6) so that the plastic covers the surface of the black sheath material to form a first layer of color stripes; Step S3: injecting colored plastic into the first injection hole (5) so that the plastic covers the first layer of color stripes to form a second layer of color stripes.

3. The extrusion method of the sheath multi-color strip extrusion device according to claim 2, characterized in that: The first layer of color stripes and the second layer of color stripes form ABA-type color stripes.

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