JPS5940090B2 - Synthetic rubber molding equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a synthetic rubber molding apparatus.

According to the conventional synthetic rubber molding apparatus, as shown in Fig. 1, the synthetic rubber extruded by the extruder is a single block-shaped piece! Grass roots (approximately 80mm x 4oomm), thickness A
There is a considerable amount of board width, and a predetermined width B is required for the board width.

Synthetic rubber that is continuously and slowly extruded in a predetermined width B is
In the next step, the block product 1 is cut into a predetermined length C by a cutting machine, resulting in a block product 1, that is, a primary product.

In other words, the shape of the synthetic rubber extruded from the extruder is approximately 80
It has a cross section of mm x 400mm.

This is cut into a predetermined length C to obtain block products 1, such as 25 by 2 or 30 by 9, for example.

According to such a conventional example, an error of approximately ±1.5% occurs due to unbalance of extrusion in the extruder.

In other words, for example, if you try to obtain block product 1 of 2 for 25, there will be variations, and to account for this error, 9 will be added to 0.375 x 2 = 0.75, and extra material will be supplied by that amount. Must be.

Furthermore, since a large cross section (AXB) is cut, the load capacity of the cutting machine becomes large.

In order to extrude an even larger cross section (AXB), the power spent on extrusion must be increased.

The present invention provides a synthetic rubber molding apparatus capable of solving the above-mentioned problems, and one embodiment thereof will be described below with reference to FIGS. 2 to 5.

10 is an extruder, from which a synthetic rubber 11 having a predetermined thickness A and a width obtained by dividing a predetermined width B into equal parts, that is, in the example, the width (B/4) when divided into four equal parts, is continuously produced. Extruded.

Reference numeral 12 denotes a synthetic rubber extrusion path, which is constituted by an idling roller conveyor 13.

Reference numeral 14 denotes a cutting machine provided in the synthetic rubber extrusion path 12, and a synthetic rubber tip detection device 15 for detecting the tip 11a of the synthetic rubber 11 is provided downstream of the cutting machine.

This synthetic rubber tip detection device 15 includes a gate-shaped frame 16 arranged so as to surround the extrusion path 12, and a gate-shaped frame 16 disposed so as to surround the extrusion path 12.
It consists of a projector 17 attached to the inner surface of one side and a receiver 18 attached to the inner surface of the other side, and wheels 19 attached to the lower end thereof.
By placing it on the rail 20 laid on the frame side of the idle roller conveyor 13, the detection position can be changed along the extrusion path 12.

The synthetic rubber tip detection device 15 is configured to detect the tip 11a by blocking the light emitted by the synthetic rubber 11, and to issue an activation signal to the cutting machine 14 from the light receiver 18.

Although a phototube method is shown in the embodiment, a mechanical method or the like may also be adopted.

The detection position change movement of the synthetic rubber tip detection device 15 is as follows:
A screw block 23 attached to the upper part of the portal frame 16 is externally fitted onto a screw rod 22 arranged above the extrusion path 12 in the direction of the extrusion path 12 and rotatably supported by the fixed frame 21. This is possible by aligning the threaded rod 22 in the forward and reverse directions with a pulse motor 24 attached to the fixed frame 21.

A measuring device 25 for weighing cut synthetic rubber one by one is provided at the bottom of the extrusion path 12, and this measuring device 2
5 and a processing device 26 is installed in parallel.

This processing device 26 receives the weighing signal E from the weighing device 25, and receives a predetermined number N (four in the embodiment).

) to the number (N-1) that does not receive one tree, and the added value G is obtained.

is compared with a predetermined value G and a signal F corresponding to the difference G4 is provided to the pulse motor 24.

The pulse motor 24 rotates in forward and reverse directions a predetermined number of times based on the signal F, thereby moving the synthetic rubber tip detection device 15 from the set position 0 to the position based on the signal F.

And the pulse motor 24 is 11 synthetic rubber tip detection device 1
5 detects the tip 11a of the synthetic rubber 11, and then rotates the synthetic rubber tip detection device 15 so as to return it to the set position O.

A side press device 27 is provided below the weighing device 25 for pressing a predetermined number N of cut synthetic rubber pieces in a parallel manner from the parallel direction.

This side press device 27 includes a carry-in conveyor 28 that receives the cut synthetic rubber from the weighing device 25, and a stopper 29 that positions the cut synthetic rubber on the carry-in conveyor 28.
and a receiving section 30 disposed on one side of the carry-in conveyor 28;
This receiver includes a fixed press tool 31 erected on the outside of the part 30,
It is composed of a movable press tool 32 that can move toward and away from a fixed press tool 31 by passing over the carry-in conveyor 28 from the other side of the carry-in conveyor 28, and a cylinder 33 and a guide mechanism 34 for moving the movable press tool 32.

An upper press device 35 and a discharge conveyor 36 are provided in this order at the lower end of the receiving section 30, and a pusher device 37 is provided at the upper end.

The receiver section 30 is provided with a drive roller 38 for carrying out, and a guide (not shown) for aligning the tips of the cut synthetic rubber pieces pushed onto the receiver section 30.

Next, the operation will be explained.

The synthetic rubber 11 extruded here has a predetermined thickness A and a thickness of 4
It is assumed that the width (B/4) is divided into equal parts, and the block product 1 is obtained by molding four pieces with a press.

And the four cut synthetic rubbers are 11A, 11B, 11C,
Indicated by 11D.

Further, it is assumed that the block product 1 has a predetermined value G of 25 to 9, and the setting position 0 of the synthetic rubber tip detection device 15 is determined accordingly to cut into a predetermined length C.

The synthetic rubber 11 extruded from the extruder 10 has its tip 1
1a is detected by the synthetic rubber tip detection device 15 and cut by the cutting machine 14, and the first cut synthetic rubber IIA
becomes.

This cut synthetic rubber 11A is weighed by a weighing device 25, and its weighing signal E is given to a processing device 26, so that the processing device 26 stores the first measurement value G1.

The weighed cut synthetic rubber 11A is transferred to the conveyor 28, and the receiver is transferred onto the section 30 by horizontal pushing by the movable press tool 32.

The same holds true for the second and third cut synthetic rubbers 11B and 11C, so that the three cut synthetic rubbers 11A, 11B, and IIC are arranged in parallel on the receiver section 30.

By the way, in the processing device 26, three measured values G1. G
2. G3 is added, and the added value Go is compared with a predetermined value G, resulting in a difference G4.

In other words, the difference G4 is (G4=G GI G2 G
3), where the measured value G1. G2. G3 is calculated as CG/4), but in actuality it is not equal due to the unbalance of extrusion as described above.

In other words, the calculation is G/426.25? However, it is actually Kp).

Therefore, the additional value G. is CGO=6.25X3±α218.75±αKy), and this α changes.

However, the addition value GO is known because it has been reliably added.

Thereby, the difference G4 can be obtained as (G42G-Go (known)).

That is, (G4225-(18,75 Sat α)=6.25
〒α becomes 9).

As a result, a signal F is sent from the processing device 26 to the pulse motor 24.
is emitted.

When this signal F is (-α), it moves the synthetic rubber tip detection device 15 to the cutting machine 14 side in order to obtain the fourth cut synthetic rubber 11D that is shorter than the predetermined length C (-7), and also When the length is (10α), the synthetic rubber tip detection device 15 is moved to the side away from the cutting machine 14 in order to obtain the cut synthetic rubber 11D which is longer than the predetermined length C (10 l).

As a result, the fourth cut synthetic rubber 11D can be obtained, and immediately after that, the synthetic rubber tip detection device 15 returns to the original setting position O.

This fourth piece of cut synthetic rubber 11D is also transferred to section 30, as shown in Fig. 5A.

Other cut synthetic rubbers 11A and 11B are shown in the illustration.

It is paralleled with 11C.

Here, (-l) and (10l) are small.

When pushing the fourth cut synthetic rubber 11D sideways, all the cut synthetic rubber 11A, 11B.

11c and l'l are a fixed press tool 31 and a movable press tool 32
The adjacent side surfaces are pressed together and integrated.

The material is then sent to the upper press device 35 by the pusher device 37, where it is pressed in the thickness direction for final finishing.

The block product 1 obtained by kneading is conveyed to a conveyor 36
It is carried out via.

Here, the variation in errors in the block product 1 obtained by the present invention will be explained in detail.

In other words, the weight of block product 1 is CGo (known) +
04).

By the way, (Go" = 18.75 Sat αKp), and [α2±〇, 09375X3 = 0.28125 Ki0,
2 s K9), the known is [Goki18.
75±o, 28Kp)a.

Among these, the maximum added value C18,75+0.28=19.0
3Kp), ((G4)=25 19.03=
5.97 to 9), and the fourth cut synthetic rubber obtained based on this becomes 0.08955 to 9].

Also, the minimum addition value (18,75-0,28=18.47K
p), [(G4)=25-18.47=6.
53 to 9:), and the weight of the cut synthetic rubber IID obtained based on this is (6,53±), so both mold amounts (5,
97±〇, 08955Kp) j(6,53±0.09
795Kp) is (5,97-0,08
955~6.53+0.09795ki 5.88~6:6
3KgA) Good luck.

In other words, the weight range of block product 1 is (19,03+5
．． 88~18.47+6.63=24.91~25.1
0Kp), resulting in a variation of 9] within the predetermined value of 25±0.10.

Therefore, to obtain a given block product 1 (0,1
0x220.20 to 9] is the cutout, which is about one quarter of the conventional cutout (0.75Kp), which is significantly less.

In the above embodiment, the synthetic rubber 11 is extruded at a temperature of about 100 to 120°C at the exit of the extruder 10, and the side press device 27
Since the temperature is maintained at about 100℃ even at the position of
Bonding by pressing as described above can be easily performed.

As described above, according to the present invention, a block product is obtained by press bonding a plurality of cut synthetic rubber pieces, and at that time (N-
1) Since the cutting length of the remaining one is controlled by knowing the weight up to the final product, it is possible to reduce the range of variation in product weight error in proportion to the number of products, improving the molding accuracy of the product, and improving the primary Product yield can be improved.

Also, it means cutting a smaller cross section than the conventional one,
The load capacity of the cutting machine can be reduced.

Since the extruder extrudes a product with a smaller cross section than conventional products, the extrusion resistance is reduced and the power required for extrusion can be reduced.

Furthermore, a cooling device for synthetic rubber can be made unnecessary.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional fabric product, Figs. 2 to 5 show an embodiment of the present invention, and Fig. 2 is an overall plan view.
Figure 3 is a vertical sectional front view of the main part, Figure 4 is I in Figure 3.
The sectional view taken along line V-■ and Figure 5 A2 are perspective views of the block product, respectively. DESCRIPTION OF SYMBOLS 1...Block product, 10...Extruder, 11...Synthetic rubber, 11a...Tip, 11A, 11B. 11C, IID... Cut synthetic rubber, 12...
... Synthetic rubber extrusion route, 14 ... Cutting machine,
15...Synthetic rubber tip detection device, 24...
...Pulse motor, 25...Measuring device, 26.
...Processing device, 27...Side press device, 30...Bake part, 31...Fixed press tool, 32...Movable press Ingredients, A...
・Thickness, B: Predetermined width, C: Predetermined length, D: Actuation signal, E: Weighing signal, F:...・Signal, 0...Setting position.

Claims (1)

[Claims] 1. A cutting machine and a synthetic rubber tip detection device installed in this order corresponding to the synthetic rubber extrusion route, a measuring device that weighs cut synthetic rubber one by one, a processing device attached to this measuring device, and a predetermined A side press device presses a number of pieces of cut synthetic rubber in a parallel direction from the parallel direction, and the synthetic rubber tip detection device can change the detection position along the extrusion path, and is connected to the cutting machine by detecting the tip. The processing device receives the weighing signal from the weighing device, adds up to a number that is less than a predetermined number by one tree, and compares the added value with a predetermined value to determine the difference. The synthetic rubber tip detection device is configured to give a signal corresponding to the synthetic rubber tip detection device to the synthetic rubber tip detection device, and further, the synthetic rubber tip detection device at the set position moves to a position based on the signal, detects the synthetic rubber tip, and then returns to the set position. A synthetic rubber molding device characterized in that it is configured to return.