JPS59205Y2 - Press for long rubber molds - Google Patents

Description

[Detailed description of the invention] This invention relates to a press device for long rubber molds, which is used for preforming and mold pressing of rubber molded products, especially long products such as band rails for escalators, etc. .

Conventionally, as an apparatus for molding long molded products, for example, a double-sided mold press (two pillars,
A four-post or box-type mold press or a C-type mold press as shown in FIG. 2 are generally known.

However, as shown in Fig. 1, the double-supported mold press consists of a frame upper plate 1 and a frame lower plate 2 that are erected along both edges in the longitudinal direction and at appropriate intervals. An upper mold 4 and a lower mold 5 are arranged in the longitudinal direction of the center of the opposing surfaces of the frame upper plate 1 and the frame lower plate 2. Tear down,
Hydraulic cylinder 6 arranged on the upper part of frame upper plate 1
This structure differs from the structure in which the upper mold 4 is moved up and down by the operation of the upper die 4 to press or release the product, and the press pressure is received by the upper and lower plates 1 and 2, and a vertical load is applied to the columns 3 and 4. Although the structure is relatively compact and simple, when several of these presses are lined up in order to perform long rubber molding, the supports 3 or 4 come on the work surface and get in the way, resulting in very poor workability.

Furthermore, as shown in Fig. 2, the C-type mold press is made up of a long C-shaped frame 5 with a C-shaped cross section made by welding a large number of steel plates. It consists of a long upper mold 8 and a lower mold 9 arranged as shown in FIG. It consists of pressing and releasing the product, and it is true that there are no supports on the work surface, so it is easier to work than a double-supported mold press, and it prevents bending stress when pressurizing. In order to do this, the frame is made of welded steel plates, which increases the size of the frame, resulting in a large installation area and weight, and furthermore, there are disadvantages such as high manufacturing costs.

Therefore, there has recently been a demand for a press structure that solves the drawbacks of both types mentioned above.

In view of the above points, the purpose of this invention was to provide a press that solved the drawbacks of conventional presses, a compact press with good workability. A long frame plate is arranged along the frame plate, and the frame plate is arranged on the opposing surface side of each frame plate, and is brought into a fitted state by moving at least one of them when pressurized by the pressure mechanism. In a press device for a long rubber mold consisting of an upper mold and a lower mold, an opening/closing mechanism is provided on the other edge in the longitudinal direction opposite to the position where the support is arranged to prevent the upper and lower frames from expanding when pressurized. A plurality of possible reinforcing frames are attached along the longitudinal direction, and one end of the reinforcing frame is connected and fixed to the top plate of the frame by a bearing so that they can rotate simultaneously, and the fixed end of the reinforcing frame is and other end (free end)
The press for long rubber molds is characterized by having locking portions that engage with the upper and lower plates of the frame, respectively.

Hereinafter, one embodiment of this invention will be described with reference to the drawings. In FIG. 3, 11 is the frame lower plate 2 shown in FIG.
The lower frame plate has a structure similar to that of the lower frame plate, and several columns 12 are vertically provided on one end edge in the longitudinal direction, and a frame lower plate 11 and a frame upper plate 13 are provided at the upper end of the column 12. One longitudinal edge of the upper plate 12 is fixed so that the upper plate 12 and the upper plate 12 are arranged relative to each other, and the upper plate 12 is basically of a cantilevered type.

Reference numerals 14 and 15 are the same upper and lower molds as shown in FIG. 1, and the upper mold 14 is moved up and down by a hydraulic cylinder 16, which is a pressure mechanism, to press or release the product. There is.

Reference numeral 17 designates a reinforcing frame that can be opened and closed, which characterizes a part of this invention. Moreover, one end is fixed to the line shirts 1 to 1B, which are arranged rotatably in a direction perpendicular to the long plane direction, so that it rotates as the shirts I and 18 rotate, that is, The other end side of the frame 17 is configured to be openable and closable with respect to the frame lower plate 11.

Moreover, the fixed end portion 19 which is one end of the reinforcing frame 17
The free end 20, which is the other end, has a locking part (also a stopper part) that has an engaging surface 22,23 that can be held on the upper surface of the upper frame plate 13 and the lower surface of the thin plate part 21 of the lower frame plate 11. ) is formed.

Reference numeral 24 denotes an electric or hydraulic/pneumatic actuator for rotating the line shaft 18 installed on the frame upper plate 13 and the reinforcing frame 17 that rotates along with the line shaft 18 in a direction perpendicular to the longitudinal direction of the frame upper plate 13, etc. It has a structure in which it is connected to a gear 26 integrated with the line shaft 1B via a transmission chain 25 (or belt).

Reference numeral 27 denotes a bearing, which is desirably located close to the reinforcing frame 17 so as to avoid applying bending stress to the shirt 1 on the shirt 1 as much as possible.

Next, the usage situation of the press for long rubber molds of the present invention having such a configuration will be explained, for example, when preforming a band rail for an escalator.

First, regarding setup (work), as shown in FIG. Although not shown, a band rail for preforming is placed directly on the lower mold 15 from the open side.

In this case, as shown in Figure 1, there are 3 or 4 pillars on the open side.
Since there are no such parts, there is no need to worry about inserting and arranging frame upper plate 1 (lower plate 2) from the longitudinal direction, and long items such as band rails can be placed extremely smoothly.
Workability is extremely good.

When the arrangement is completed, the actuator 24 is operated to rotate the line shaft 18, and as shown in FIG. engage (bite)
, close the reinforcing frame (close).

In this case, it goes without saying that the retaining surface 22 is brought into contact (bitten) with the upper surface of the frame upper plate 13 on the fixed end side of the reinforcing frame 17 as well.

When rotating and closing this reinforcing frame 17,
Since the entire press structure is a cantilever type, the frame upper plate 13 is bent, so that the lower surface of the thin plate portion 21 of the frame lower plate 11 and the free end portion 20 of the reinforcing frame 17 engage the engaging surface 2.
The advantage that a gap is naturally formed between the retaining surface 23 and the lower surface of the thin plate part 21 is extremely smooth and cannot be overlooked.

Next, regarding pressing, once the reinforcing frame 17 has been closed as described above, the hydraulic cylinder 1
6 is operated to move the upper mold 14 downward and pressurize the band rail located on the lower mold 15, thereby preforming the band rail and completing the pressing operation.

When pressurizing force is applied to the upper mold 14 in this way, and molding starts with further application, the pressure causes damage to the frame upper plate 13 that was generated when the reinforcing frame [7] was closed.
Since the deflection of the retaining surface 23 is corrected, the problem caused by the retaining surface 23 and the lower surface completely disappears.

Moreover, since the reinforcing frame 17 prevents the upper frame plate 13 from spreading (bending stress) and only applies almost equal vertical tensile stress to the struts 12 and the reinforcing frame 17, the upper and lower molds are Since a uniform horizontal surface can be created between 14° and 15°, an extremely satisfactory pressure-molded product can be obtained.

Once the pressing work is completed in this way, the next step is to open (flip up) the reinforcing frame 17 as shown in FIG.
One step of the work is completed by taking out the preformed band rail directly from the open side, and this step is then repeated.

Although this embodiment shows the case where the band rail is preformed, it goes without saying that it can also be used for molding or single-head press (one pressurizing mechanism).

Further, in this embodiment, rod-shaped supports 12 and reinforcing frames 17 are used, but wide plate-shaped ones may also be used. In particular, when the reinforcing frame 17 is closed, 13.It can be of any shape as long as it has a part that becomes a locking part (part of a stopper) for 11, but for example, a stepped shaft with a stepped part as a locking part, or a top or A possible shaft is one in which the shaft is inserted from below and a stopper is inserted.

Also, for replacing the upper and lower molds 14 and 15, after flipping up the reinforcing frame 17, insert a guide rail etc. from the work surface (open) side, take out the mold to the work surface, and set another mold. A so-called single setup device is possible.

As described above, according to this invention, the press structure is basically a cantilever type, and a reinforcing frame that can be opened and closed is attached to the free end so that it becomes a double support type when pressurizing. As a result, it is as compact as a conventional double-sided press, requiring a smaller installation area and being less expensive, while also being as easy to work with as a conventional C-frame press. Therefore, its practical value is great.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of the main parts of a conventional press;
FIG. 3 is a perspective view showing an embodiment of this invention, and FIG. 4 is an explanatory view of the main part of FIG. 3. 1.13... Frame top plate, 2,11...
・・Frame lower plate, 3, 12 ・・・・・ Support, 4, 8
．． 14... Upper mold, 5,9° 15...
Lower mold, 6.10.16... Hydraulic cylinder
7...C-type frame, 17...Reinforcement frame, 1B...Line shaft, 19...
... Fixed end, 20 ... Yamada end, 22.23
......Engagement surface, 24...Actuator 25...Chain, 26...Gear,
27...Bearing.

Claims (1)

[Scope of utility model registration request] The long frame plates are arranged vertically and relative to each other via struts arranged along one edge in the longitudinal direction, and the frame plates are arranged on the opposite side of each frame plate and pressurized. In a press for a long rubber mold of a cantilever type in which at least one of the upper and lower molds is opened in a fitted state by moving, the longitudinal length of the support is located opposite to the position where the support is located and the opening is made. On the other edge of the frame, a plurality of reinforcing frames that can be opened and closed are installed along the longitudinal direction to prevent the upper and lower frames from spreading when pressurized.
One end of the reinforcing frame is connected and fixed to the frame upper plate by a line shaft and a bearing so that they can rotate simultaneously, and the fixed end and the other end (free end) have locking parts that engage with the upper and lower frames, respectively. A flange for a long rubber mold, characterized by comprising: