JPH0343008Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an embossing printing device for crosslinked rubber/plastic cables.

Conventionally, printing indications on crosslinked rubber/plastic cables such as crosslinked polyethylene cables have mainly been surface printed using ink. However, surface printing using ink has the disadvantage that it becomes unclear due to friction during use. In addition, attempts have been made to print embossing on the surface of a crosslinked rubber/plastic cable by baking or the like after crosslinking and cooling, but this printing method had the disadvantage that the embossed markings became unclear when heated.

There is also a hose extruder that prints by pressing an emboss printing roll horizontally against the side of the extruded hose using a coil spring at the exit side of the hose extruder (Japanese Patent Application Laid-Open No. 51-119).
No. 78418), since it is not cross-linked after printing, the printed part is likely to lose its shape and the print may become unclear. Furthermore, it does not print using the weight of the printing material and requires a coil spring. This makes the structure complicated, requires spring adjustment, and has the disadvantage that printing inside a crosslinked pipe is not easy. Furthermore, if you try to print the printing material inside the cross-linked tube, the part to be printed will be soft because it is not cross-linked, and the printing material will contact the bottom of the cross-linked tube and cause scratches, or the bottom surface will become flat and deformed, resulting in poor appearance. There was a defect that made it defective.

An object of the present invention is to provide an embossing printing device for cross-linked rubber/plastic cables that can easily and clearly print embossing on cross-linked rubber/plastic cables.

The embossing printing device for cross-linked rubber/plastic cables according to the present invention includes a mounting frame that is set on the inlet side of a cross-linked pipe for cross-linking uncross-linked rubber/plastic cables, and a mounting frame that is installed with the axis of rotation oriented horizontally. an embossing printing roll rotatably supported on the lower side of the frame and provided at a position where the uncrosslinked rubber/plastic layer of the cable has not yet been crosslinked and cured; 1. An embossing printing device for cross-linked rubber/plastic cables, characterized in that the apparatus further comprises a cable passageway formed in the mounting frame for the passage of the rubber/plastic cables. The invention is characterized by comprising a cable passage formed in.

Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 to 3, a cable conductor 1 passes through an extruder crosshead 2, and an uncrosslinked rubber/plastic layer 3' containing a crosslinking agent is extruded and coated on the outer periphery of the cable conductor 1 to form an uncrosslinked rubber/plastic cable 4. '. This uncrosslinked rubber/plastic cable 4' is fed into a crosslinked pipe 5 connected to the outlet side of the crosshead 2, and as it passes through it, the uncrosslinked rubber/plastic layer 3' is heated and crosslinked to make the crosslinked rubber.・The plastic layer 3 becomes the cross-linked rubber plastic cable 4. The embossing printing device 6 of this embodiment is disposed inside the bridge pipe 5 near the outlet of the crosshead 2, in other words, on the inlet side of the bridge pipe 5. This embossing printing device 6
has a mounting frame 7 set within the bridge pipe 5. The mounting frame 7 consists of a tube body 8 fitted to the inner periphery of the bridge pipe 5, and a pair of brackets 9 fixedly installed within the tube body 8 in mutually parallel directions. A shaft 10 is passed through the lower part of both brackets 9 in a horizontal direction and is fixed with a nut 11. An embossing printing roll 12 is rotatably supported in the middle of the horizontal shaft 10 and is located at a position where the uncrosslinked rubber/plastic layer 3' of the cable 4' is not yet crosslinked and cured. An emboss printing section 14 is provided protruding from the bottom of the groove 13 on the outer periphery of the emboss printing roll 12. The embossing printing roll 12 is positioned on the shaft 10 by a collar 15. Inside the mounting frame 7, uncrosslinked rubber is placed on the embossing printing roll 12.
A cable passage 16 is formed for the plastic cable 4' to pass through. Connectors 17 serving as frame positioning means are fixed to the inner periphery of the front portion of the tubular body 8 at predetermined intervals in the circumferential direction. Note that 18 is a notch formed in the tubular body 8 so that the embossing printing roll 12 does not hit it.

Such an embossing printing device 6 is set on the inlet side of the crosslinked pipe 5 connected to the outlet of the extruder crosshead 2, as described above. At this time, the embossing printing device 6 performs embossing printing when the uncrosslinked rubber/plastic layer 3' of the uncrosslinked rubber/plastic cable 4' extruded from the extruder crosshead 2 is at an appropriate softness before crosslinking and hardening. Therefore, it is necessary to set it at an appropriate position from the entrance of the bridge pipe 5. Such a position is preferably a position that is 20% or less of the length of the bridge pipe 5 (including the cooling pipe). Positioning at this time is performed using a connector 17 attached to the tube body 8 in advance. When the length of the connector 17 is insufficient, add another rod to the threaded portion of the connector 17 to make it longer, and use this rod to push the embossing printing device 6 into the bridge pipe 5 for positioning. . The embossing printing device 6 prints the cross-linked pipe 5 once the positioning is completed.
The inlet of the extruder is connected to the outlet side to the extruder crosshead 2.

With this arrangement, the uncrosslinked rubber/plastic cable 4' extruded from the extruder crosshead 2 enters the crosslinked tube 5 and passes over the embossing printing roll 12 of the embossing printing device 6. At this time, the lower surface of the uncrosslinked rubber/plastic cable 4' is pressed by its own weight against the groove 13 on the outer periphery of the embossing printing roll 12, and as the embossing printing roll 12 rotates, the emboss printing is applied to the uncrosslinked rubber/plastic by the emboss printing unit 14. This is done successively on the lower surface of layer 3'. Since emboss printing is performed before crosslinking is completed, emboss printing can be performed easily and clearly. The emboss-printed cable undergoes crosslinking as it passes through the crosslinked pipe 5, and becomes a crosslinked rubber/plastic cable 4. The emboss printed portion in an uncrosslinked state will not lose its shape by being crosslinked.

As explained above, the embossing printing device for crosslinked rubber/plastic cables according to the present invention has a structure in which it is set in the crosslinking pipe near the crosshead of the extruder, so embossing printing is performed before the rubber/plastic layer is completely cured by crosslinking. Therefore, it is possible to easily and clearly embossing crosslinked rubber/plastic cables, which has been difficult in the past. In particular, the embossing printing device of the present invention has a structure in which an uncrosslinked rubber/plastic cable is placed on an embossing printing roll and embossing printing is performed using the weight of the uncrosslinked rubber/plastic cable, which is contrary to the present invention. There is no need for a structure in which the embossing printing roll is weighted and adjusting the weight as is the case with the type where the embossing printing roll rides on a cable, and the structure is simplified and no adjustment is required. Furthermore, emboss printing can be easily performed with high reliability even inside a crosslinked pipe. In addition, in the present invention, since the embossing printing roll receives the lower surface of the uncrosslinked rubber/plastic cable, it is possible to prevent the soft uncrosslinked rubber/plastic cable from coming into contact with the inner bottom surface of the crosslinked pipe and being damaged, and to prevent the uncrosslinked rubber/plastic cable from being damaged by contact with the inner bottom surface of the crosslinked pipe. - It is possible to prevent the uncrosslinked rubber/plastic layer of the plastic cable from becoming uneven in thickness within the crosslinked pipe.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the state of a cross-linked pipe in which the embossing printing device of the present invention is set, and FIGS. 2 and 3 are a front view and a vertical cross-sectional view of one embodiment of the embossing printing device of the present invention. . DESCRIPTION OF SYMBOLS 1...Cable conductor, 2...Extruder crosshead, 3'...Uncrosslinked rubber/plastic layer, 3...
...Crosslinked rubber/plastic layer, 4'...Uncrosslinked rubber/plastic cable, 4...Crosslinked rubber/plastic cable, 5...Crosslinked pipe, 6...Emboss printing device, 7...Mounting frame, 8...Pipe Body, 9... Bracket, 10... Shaft, 12... Embossed printing roll, 13... Groove, 14... Embossed printing section, 16... Cable passage.

Claims (1)

[Scope of utility model registration request] A mounting frame is set on the inlet side of a cross-linked pipe for cross-linking uncross-linked rubber/plastic cables; an embossing printing roll provided at a position where the uncrosslinked rubber/plastic layer is not yet crosslinked and cured; and an embossing printing roll provided within the mounting frame such that the uncrosslinked rubber/plastic cable passes over the embossing printing roll. 1. An embossing printing device for crosslinked rubber/plastic cables, characterized in that the embossing printing device comprises a formed cable passageway.