JPS604735Y2 - Elastic bushing manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manufacturing apparatus capable of manufacturing elastic bushings continuously and in a short time.

Conventionally, in manufacturing an elastic bushing 1 as shown in FIG. 1, rubber 3 is vulcanized in a cylindrical shape around the outer periphery of an inner cylinder 2 formed of a metal material, and an adhesive is applied to the outer periphery of the rubber 3 and the inner surface thereof. 4
An unbonded bushing 6 is formed by driving an outer cylinder 5 made of a metal material coated with It was fixed with adhesive.

However, when heating with hot air, 130°C ~ 1
Must be heated from 3e to 12e at a temperature of 70 °C.

Further, when heating with steam, heating had to be performed at a temperature of 3e to 12e at a temperature of 130°C to 160°C.

For this reason, there were drawbacks as listed below.

(1) Since the rubber is heated for a long time, the rubber deteriorates and the spring constant decreases significantly.

(2) The adhesive force between the rubber and the outer cylinder is weak.

(3) When steam is used for heating, rust occurs on the inner and outer cylinders.

(4) Due to the long heating time, only loft production was possible.

In view of the above-mentioned drawbacks of the conventional technology, the present invention raises the heating temperature to a high temperature higher than the adhesive reaction temperature of the adhesive in a short period of time, immediately cools it down, and uses the residual heat to firmly bond the outer cylinder and the rubber. An object of the present invention is to obtain an apparatus for manufacturing an elastic bushing that can be manufactured continuously.

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in FIG.

In FIG. 2, reference numeral 11 denotes a transfer device that sequentially transfers the unbonded bushings 6 formed as shown in FIG. A rod 15 includes a guy 13 that is provided on the upper surface and guides the unbonded bushing 6 horizontally along its axis, and a pusher 14 that moves the unbonded bushing 6 guided into the guide 13 by one piece. a cylinder 16 attached to the tip of the pusher 14, a microswitch 17, 18 that controls the positioning of the pusher 14, and the guide 13.
The microswitch 19 detects whether or not an unbonded bushing 6 is supplied within the bushing.

Reference numeral 20 denotes a storage device that stores unbonded bushings so that they can be sequentially supplied to the guide 13, and this storage device 2
0, unbonded bushings 6 are stored in several rows in an array.

Reference numeral 21 denotes an outer cylinder 5 of the unbonded bushing 6 that is disposed on the downstream side of the transfer device 11 and is transferred from the transfer device 11.
This is a heating device that heats the outer cylinder 5 and the rubber 3 to firmly bond the outer cylinder 5 and the rubber 3.

This heating device 21 includes a fixed mold 22 that can guide the unbonded bushing 6 horizontally along its axis, a heater 23 installed near the top of the fixed mold 22, and a heater 23 located below the heater 23. , a heat insulating plate 24 provided on the fixed mold 22, a movable mold 25 provided at a position corresponding to the fixed mold 22, a heater 26 provided at a position near the lower surface of this movable mold 25, and a At the top, there is a heat insulating plate 27 provided on the movable mold 25, a cylinder 28 for moving the movable mold 25 up and down, and a surface corresponding to the fixed mold 22 and the movable mold 25 is the unbonded bushing 6. a recess 29 formed so as to come into contact only with the outer cylinder 5;
It consists of 30.

Reference numeral 31 denotes a heat retaining device that is provided at the rear end of the heating device 21 and prevents the elastic bushing 1 that has passed through the heating device 21 from being rapidly cooled. The base 33 and this base 3
It consists of an infrared lamp 34 provided within the base 33 and an infrared lamp 35 provided above the base 33.

In the above configuration, when an unbonded bushing 6 as shown in FIG. 1 is stored in the storage device 20 by a parts feeder or the like, one bushing 6 is guided from the storage device 20 to the guide 13 of the transfer device 11.

Thereafter, when the cylinder 16 of the transfer device 11 is moved forward, the pusher 14 feeds one unbonded bushing 6 in the axial direction.

That is, by moving the pusher 14 forward, the unbonded bushing 6 guided by the guide 13 moves forward in the horizontal direction along its axis, and when the pusher 14 is moved backward, it is stored in the storage device 20. The following unbonded bushing 6 falls toward the guide 13 by its own weight.

This operation is then repeated at regular time intervals.

The unbonded bushings 6 thus transferred from the transfer device 11 are sequentially transferred into the heating device 21.

In this transfer process, each time the unbonded bushing 6 advances, the movable mold 25 moves upward by the action of the cylinder 28, and immediately after the transfer is completed, it descends and heats the outer cylinder 5 of the unbonded bushing 6. do.

This heating is carried out by heaters 23,26 and 10
It is high temperature heating of 180 degreeC - 220 degreeC between -208/.

In this way, each time one unbonded bushing 6 is transferred, the elastic bushing 1 (unbonded bushing 6), in which the outer cylinder 5 and the rubber 3 are firmly fixed by being heated, is transferred to the heat retaining device 31 in the latter stage. will be transferred to.

In this heat retaining device 31, the elastic bushing 1 is cooled gradually without being rapidly cooled by the infrared lamps 34, 35, and then pushed out by the guide 32.

In the above embodiment, the fixed mold 22 and the movable mold 25 are used as the heating device 21, and the movable mold 25 is moved up and down by the cylinder 28. It may be only a fixed type in which a cylindrical hole is formed in which the bushing 6 is guided and moved.

As is clear from the above description, the present invention includes a transfer device that sequentially transfers unbonded bushings horizontally along its axis at regular time intervals, and a transfer device that transfers unbonded bushings transferred by this transfer device. By configuring the heating device with an electric heating direct heating type heating device, the following effects can be obtained.

(1) Since only a short heating time is required, there is little deterioration of the rubber and the quality is good.

According to experiments, the decrease in spring constant was -50 to -20
%, whereas in the present invention, it was about 0 to -3%.

(2) An adhesive force equivalent to that of vulcanized adhesive can be obtained.

According to experiments, the adhesive strength (900 peel) is 20k compared to conventional
g/25mm, whereas in this invention it is 50 to 9/25mm.
It became 25W7+.

(3) Since continuous production is possible, productivity is higher than conventional loft production.

(4) Since it is a direct electric heating method, there is relatively little energy loss.

(5) There is little rubber settling (retention rate) due to heating.

According to experiments, the rubber set-off was 70% in the conventional case, but it was 95-98% in the present invention.

(6) Unlike conventional heating methods, metal parts do not rust.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing a conventional embodiment, and FIG. 2 is a schematic explanatory diagram showing an embodiment of the present invention. 1...Elastic bushing, 3...Rubber,
5. Curved outer cylinder, 6... Unbonded bushing, 11
...Transfer device, 13...Guide, 14
... Pusher, 16 ... Cylinder, 20 ... Storage device, 21 ... Heating device, 23, 26 ... Heater, 31.・・・・・・
・Heat insulation device.

Claims (2)

[Scope of utility model registration request] (1) A cylindrical rubber is formed on the outer periphery of an inner cylinder made of a metal material, and an unbonded bushing that has been previously formed by driving an outer cylinder made of a metal material onto the outer periphery of this rubber via an adhesive. A transfer device that sequentially transfers horizontally along the axis at fixed time intervals, and an outer cylinder of the unbonded bushing that is sequentially transferred at fixed time intervals by this transfer device to heat the outer cylinder and the rubber to strengthen it. An elastic bushing manufacturing device characterized by comprising a heating device using an electric direct heating method for bonding. (2) The elastic bushing according to claim 1 of the utility model registration, characterized in that the rear end of the heating device is provided with a heat retention device that prevents the elastic bushing from rapidly cooling after passing through the heating device. Manufacturing equipment.