JPS5987708A - Embossing device for cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an embossing device used for stamping a company name, etc. on the surface of a cable.

(Technical Background of the Invention) A company name, year of manufacture, mark, etc. are attached to the surface of a cable, and conventionally, the company name, etc. are printed in ink on the surface of the cable using a rotatably supported printing roll.

(Fif'1 issue of background art) However, with ink printing, part of the print may disappear due to the cable coming into contact with various equipment during cable winding or laying, or due to long-term use. Furthermore, the cable itself gets dirty, so company names etc. often become illegible.

(Object of the Invention) An object of the present invention is to provide an embossed type e for stamping the company name etc. on the cable surface so that the cable surface will not be rubbed or the company name etc. will not disappear even after long-term use.

(Summary of the Invention) The present invention involves pressing an embossing roll with an appropriate pressing force onto a cable covered layer immediately after being extruded from a crosshead.
It is characterized by the company name etc. being continuously engraved on the surface of the cable.

(Example of the invention) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment in which the embossing device 1 of the present invention is applied to a continuous vulcanizer. That is, a vulcanization cooling pipe 6 is connected to the crosshead 2 of the extruder, and the embossing device 1 of the present invention is integrally attached to the vulcanization cooling pipe 6 at a position near the crosshead 2.

Cross-linked polyethylene in a molten state is fed into the crosshead 2, and cross-linked polyethylene is extruded to a predetermined diameter as an insulating material on the circumferential surface of the core wire 6 passing through the nipple 4 through a die 5. . This core #i! When the coating layer 7#'i of No. 6 is introduced into the vulcanized cooling pipe 6, it is heated under pressure by the steam to be crosslinked, and then cooled in a cooling cylinder (not shown), thereby creating a crosslinked polyethylene vinyl sheath cable. .

Embossed mounting of the present invention! ! , 1 is a core wire 6 placed in the vulcanization cooling pipe 3 and immediately after being extruded from the crosshead 2.
An embossing roll 8 that is pressed against the upper coating layer 7 and an adjustment mechanism 10 that is housed in a casing 9 that is integrally formed with the vulcanization cooling pipe 3 and that adjusts the pressing force of the embossing roll 8. It is configured.

The embossing roll 8 has a company name, year of manufacture, company mark, etc. engraved on its circumferential surface, and is rotatably supported by a bracket 11. A sleeve 12 is fixed to the bracket 11, as shown in FIG. Adjustment mechanism 10F
i, having a piston member 14 rotatably supported within the casing 9 via a bearing 16.16tl;
A cylindrical portion 15 protruding from the head 15 of this piston member 14
The sleeve 12 to which the bracket 11 is fixed is fitted in the bracket 11 so as to be slidable and rotatable in the axial direction thereof.
A coil spring 16 is disposed between the head 15 and the head 15. The head 15 has a diameter that allows it to slide on the inner wall surface of the casing 9. The upper end of a screw rod 17 is fixed to the lower end of the piston member 14, and the screw rod 17 is screwed into a threaded groove of a lid 18 fixed to the casing 9 so as to protrude from the lid 18. A handle 19 is attached to the handle.

Next, the operation of the embossing device 1 will be explained. Handle 19
When the screw rod 17 is turned in one direction, the screw rod 17 rotates through the thread groove of the lid 18 and projects into the casing 9 in its axial direction. Then, the piston member 14 rotates in the same direction and rises inside the casing 9, and the piston spatula l-"1
5 moves in a direction approaching the embossing roll 8 and applies a pressing force to the coil spring 16. coil spring 1
Since the 60 elastic force is applied to the bracket 11 as a pressing force, the embossing roll 8 is pressed against the backing layer 7 of the core wire 6. Therefore, when the pressing force of the embossing roll 8 on the coating layer 7 is small, the handle 19 is rotated, and when the pressing force is too large, the handle 19 is rotated in the opposite direction, and the pressing force of the embossing roll 8 is rotated. Adjust.

When the circumferential surface of the embossing roll 8 is pressed against the coating layer 7 in this way, the pushed-out portion of the coating layer 7 is immediately after being extruded by the crosshead 2 and has not yet been crosslinked in the vulcanization cooling pipe. The company name, company mark, etc. are engraved on the coating layer 7, and for example, as shown in FIG. 2, it is possible to obtain a polyethylene vinyl sheathed cable with the mark [5WCC1 raised in relief. Since the core wire 6 is continuously running, the embossing roll 8 also rotates along with this running. Therefore, company marks etc. can be continuously engraved on the cable.

The purpose of pressing the embossing roll 8"ft on the coating layer 7 before crosslinking is to make the markings clear. If you press it after the coating layer 7 has been crosslinked, it will not only make the markings unclear, but also It disappears when heated. By the way, the surface of the coating layer 7 portion extruded from the crosshead 2 crosslinks when it passes through the vulcanization cooling pipe 6f (2 to 3 m).

Therefore, the embossing device 1, ie, the embossing rolls 8, must all be disposed within a distance of at least 2 m from the crosshead 2.

In the above example, crosslinked polyethylene was used as the insulation coating material, but other synthetic resins such as polyethylene, polypropylene, crosslinked vinyl, and synthetic rubbers such as butyl rubber and ethylene propylene rubber may also be used with the embossing roll 8 before crosslinking. It is possible to engrave by pressing.

Further, when the above-mentioned synthetic resin or the like is used as the sheath material, a desired marking can be provided on the cable sheath as in the case of mineral resin.

(Effects of the Invention) According to the present invention, the company name, etc. is engraved on the cable surface by pressing the embossing roll with an appropriate pressing force using the pressing force adjustment mechanism against the coating layer immediately after being extruded from the crosshead collar. Even if the cable rubs when it comes into contact with equipment, etc., and even if it is laid for a long time, the company name etc. will not disappear, so it is possible to obtain a cable that is excellent as a product.

[Brief explanation of the drawing]

Figure 1 shows how the embossing device of the present invention is installed in a continuous vulcanizer.
FIG. 2 is a cross-sectional view of the cable with the company mark engraved on it.

Claims (1)

[Claims] This embossing device is placed near the crosshead of an extruder, and is rotatably supported with a company name etc. engraved on its circumferential surface. An embossing roll for a cable whose circumferential surface is pressed and rotates as the cable runs; and an adjustment mechanism for adjusting the pressing force of the embossing roll against the coated surface of the cable. Device.