JPS5916928B2 - Night Toe Canagunaiment Horse - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a hose that reduces flow loss and is optimal for use as a hose for transferring high-speed fluids.

As shown in Japanese Utility Model Publication No. 50-15227, conventional joints for connecting hoses have a step between the inner surface of the inner cylinder fitting inserted into the inner surface of the hose and the inner surface of the hose, which prevents flow loss. Not only does it increase the amount of fluid, but it also has the disadvantage that the inner cylinder fittings wear out when transferring high-speed fluids (particularly solid mixtures), making them unusable quickly.

This invention has been invented in view of the above points, and it is an object of the present invention to manufacture a hose with no step between the inner surface of the inner cylinder fitting and the inner surface of the hose by the method described in the claims. be.

The present invention will be described in detail below with reference to an embodiment of the drawings. Reference numeral 1 denotes a hose, which may be a single rubber hose, or may be a vulcanized rubber hose having reinforcing wires such as fibers or metal wires inside.

Reference numeral 2 denotes a core rod for guide, which is made of iron or nylon mandrel and has an outer diameter smaller than the inner diameter of the hose.

35 is a chuck jig, 4 is an inner cylindrical metal fitting, and the tip has a tapered surface 5 to facilitate insertion and an escape groove 6 to allow compressed rubber to escape easily, and has the same inner diameter as the hose inner diameter. It has been formed.

□ is a rotating chuck. In order to manufacture a hose that has no level difference between the inner surface of the inner cylinder metal fitting and the inner surface of the hose, first use the above-mentioned apparatus to insert a guiding core rod 2 having an outer diameter smaller than the inner diameter of the hose into the inner tube of the hose 1. Insert it so that a part of the end part a on the fitting fitting side is exposed from the hose 1, and at least at the position of the 5th end after the length of insertion of the inner cylinder fitting,
A hose with a guiding core rod 2 and a hose 1 crimped and clamped at the same time is set. On the other side, an inner cylindrical metal fitting 4" having the same inner diameter as the inner diameter of the hose 1 which is fixed to a rotating chuck at a certain distance from the hose 1 and rotated in the circumferential direction.
Set the hoses 1 and bring them close to each other in the axial direction with their axes aligned, and use the guide rod 2 to connect the hose 1.
By screwing the inner cylindrical fitting 4 between the inner cylindrical fitting 4 and the guiding core rod 2, and then removing the guiding cylindrical rod 2 from inside the hose 1, the inner cylindrical fitting j54 can be easily attached to the inside of the inner cylindrical fitting inside the hose 1. It is possible to manufacture a hose that has no level difference between the inner surface of the hose and the inner surface of the hose. This hose is connected to the inner cylinder fitting 4 as shown in Figure 2.
After inserting the vulcanized hose, it may be used by tightening it with the outer cylindrical fitting 9 from the outside surface of the vulcanized hose.

Example: After inserting a 50φ iron mandrel into a vulcanized rubber hose that has an inner diameter of 50.8φ and an outer diameter of 67.0φ with a reinforcing layer of fiber inside so that the end is exposed from the hose end, the hose end is approximately 1
The 20 mm rear end was fixed to a chuck jig.

Then, using a skyping machine inside this hose, it was fixed so that it could rotate at 100 rotations/minute in the circumferential direction.
After applying lubricant to the surface of the inner cylindrical fitting with a length of 113 m1, I screwed it in using a guide mandrel, and the hose was able to be screwed into the hose smoothly without buckling.
It was possible to easily obtain a hose in which the inner cylinder fitting and the hose inner diameter were the same diameter.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a method of manufacturing a hose with no level difference between the inner surface of the inner cylindrical fitting and the inner surface of the hose by the method of the present invention, and Fig. 2 shows the inner surface of the inner cylindrical fitting and the inner surface of the hose manufactured by the method of the present invention. A partial side sectional view showing an end portion of the hose without a step between the end portion and the end portion of the hose. 1... Hose, 2... Core rod for guide, 3... Chuck jig, 4... Inner cylinder fitting, 5...・Tapered surface, 6... Relief groove, 7... Rotating chuck, 9... External cylinder fitting, a... Tip of core rod for guide .

Claims (1)

[Claims] 1 Insert a guide core rod having an outer diameter smaller than the inner diameter of the hose into the hose on one side so that a part of the tip on the side where the inner cylinder fitting is fitted is exposed from the hose, and Set the hose with the guide rod and the hose crimped together at the rear end position of the insertion length, and fix the hose to a rotating chuck at a certain distance from the hose on the other side, and rotate it in the circumferential direction. Set the inner cylindrical fittings with the same inner diameter as the given hose inner diameter, bring them close together in the axial direction with their axes aligned, and use the guide rod to insert the inner cylindrical fittings into the hose. A method for manufacturing a hose that has no level difference between the inner surface of an inner cylindrical fitting and the inner surface of the hose, which are characterized by screwing.