KR20010112820A - Deep Cylindrical Molding Apparatus - Google Patents

Abstract

The present invention relates to novel triptolide derivatives of formulae (1)- (3) and a method of treating a patient suffering from an autoimmune disease comprising administering to a patient an effective amount of the novel triptolide derivatives.

Description

Forming apparatus for deep cylindrical container {.}

The present invention relates to a molding apparatus of a cylindrical container, more specifically, deep drawing (three times more than the height of the diameter) deep drawing in one process without moving the semi-finished product in one press (Deep Drawing) The present invention relates to a molding apparatus for a deep cylindrical container that can be processed.

Gas containers, which are widely used in portable gas stoves, are press-molded into three pieces (Three Pieces) of the body, the upper cap, and the lower cap, respectively, and are integrated by seaming the upper and lower caps to the main body.

Gas container of such structure has many connection parts, so if there is a defect in the connection part, there is a risk of explosion accident due to gas leakage. Investing costs.

As well as the cylindrical container used for the gas container as described above, the deep cylindrical container is widely used for a variety of purposes, from life to automobile parts or electronic parts.

Such a deep cylindrical container is processed while going through several processes sequentially by several single press molds, as shown in FIG.

That is, when the upper die 3 is lowered while the blank 1 is blanked from the sheet-like sheet on the upper surface of the molding pad 2, the raw material 1 placed on the molding pad is formed by the molding die ( It is pressed by the bottom of 4) and clamped.

When the upper die 3 further lowers in this state, the material 1 clamped between the forming die 4 and the forming pad 2 is drawn by the forming punch 5 while being lowered together with the forming pad 2.

The semi-finished product thus drawn is transported to another mold having a smaller inner and outer diameter of the forming die 4 and the forming punch 5, and thus undergoes a plurality of steps in sequence, thereby forming a cylindrical container having a desired inner and outer diameter. One such process is shown in more detail in FIG. 2.

In the conventional deep drawing, the number of processes increases and decreases according to the depth to diameter of the product.

However, the apparatus for deep drawing the cylindrical container by using a plurality of single-shot press molds, the following problems occur.

First, since a number of presses are required, a lot of equipment costs are required according to the purchase of several presses, as well as expensive labor costs for transporting semi-finished products and operating presses.

Second, a separate space must be secured to store semifinished products between processes, and there is a risk of safety accidents due to the transportation of semifinished products between processes.

Third, since the molding is carried while transferring the semi-finished product between spaces, the production cost is increased due to the increase of the work process.

Fourth, due to the process hardening of the semi-finished product according to the multi-process processing, the semi-finished product must be subjected to a separate process of annealing in the intermediate process. In particular, when using materials such as stainless steel and brass, the surface is hardened after one molding process. Therefore, the annealing heat treatment must be performed essentially between processes.

Fifth, since the cylindrical container is formed while moving several presses, in order to insert the semi-finished product into the molding die between processes, there must be a tolerance between the inner diameter of the semi-finished product and the outer diameter of the molding die, so that semi-finished products can be loaded, thus maintaining the roundness of the container. It becomes impossible. That is, in the case of a pressure vessel due to the nonuniformity of thickness, the container may be deformed, so the safety degree is lowered.

Accordingly, in order to improve the first, second and third of the above problems, transfer molds for deep drawing while automatically conveying the blanked material are sequentially developed and used, but this also solves the fourth and fifth problems. Can not.

The present invention has been made to solve such a conventional problem, a multi-step manual operation using a single-type press die, or using a transfer mold to avoid the method of forming a cylindrical container in a multi-step process in one step The aim is to secure a competitive edge of the company by producing cylindrical cylinders at low prices, by minimizing equipment investment costs including molds by molding deep cylindrical cylinders.

1 is a schematic view showing a conventional apparatus

Figure 2 is a process diagram showing the process of molding the container by a conventional apparatus

3 is a schematic view of a press die equipped with a device of the present invention;

4A to 4E are longitudinal cross-sectional views showing the main parts of the present invention.

Figure 5 is a longitudinal cross-sectional view showing a cushion means of the present invention

Explanation of symbols for main parts in the drawings

3: Pictograph 8: Slide Plate

9a, 9b, 9c, 9d: forming dies 14a, 14b, 14c, 14d: forming punch

16: forming pad 17: cushioning means

19: cylinder block 20a, 20b, 20c, 20d: cushion pin

21a, 21b, 21c, 21d: piston 25a, 25b, 25c, 25d: solenoid valve

26: sensing means 28a, 28b: upper, lower limit sensor

29a, 29b, 29c: Sensor

According to an aspect of the present invention for achieving the above object, in a press die equipped with a molding die on the slide plate of the upper plate and a molding pad and a punch on the lower mold, mounted on the slide plate provided to be elevated on the upper die and upwards A plurality of forming dies having gradually smaller inner diameters, a central forming punch fixed to the center of the lower die, and a lower outer diameter are formed to correspond to the forming dies installed on the upper die so as to be liftable on the lower die and installed toward the outside of the central forming punch. Cushioning means provided in the frame so as to support the forming pads and the respective forming punches so that the forming punches and the forming punches located inward from the outermost forming pads are sequentially lowered in accordance with the descending of the slide plate; Installed within the stroke range of the plate to reduce the rise and fall of the slide plate According to the present invention there is provided a molding apparatus of a deep cylindrical container, characterized in that the sensing means for driving the cushioning means.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 3 to 5 as an embodiment.

Figure 3 is a schematic view of a press die equipped with the apparatus of the present invention, Figures 4a to 4e is a longitudinal sectional view showing the main portion of the present invention, Figure 5 is a longitudinal sectional view showing a cushioning means of the present invention, the present invention is a top plate (6) Slide plate 8 is mounted on a pair of guide rods 7 fixed perpendicularly to the plurality of guide rods 7, and a plurality of forming dies 9a and 9b having a gradually smaller inner diameter toward the upper side thereof. (9c) and (9d) are mounted, and a spacer 10 having an inner diameter larger than the inner diameter formed on the forming die is provided between the forming dies.

In the forming die (9d) of the forming die, the take-out pad 11 for taking out the cylindrical container is completed to the outside is elastically installed by the spring (12).

In the center of the lower die 13, a center forming punch 14d for finally drawing a cylindrical container is fixedly installed, and the forming dies 9a, 9b, 9c provided on the upper die 3 outside the center forming punch. A plurality of forming punches 14a, 14b and 14c having an outer diameter corresponding to (9d) are provided to be liftable and positioned at the lowermost end of the upper die 3 as the outer peripheral surface of the forming punch located at the outermost side. A molding pad 16 for blanking the material 15 together with the formed molding die 9a is provided to be movable up and down.

On the other hand, below the forming pad and each forming punch, forming punches 14a, 14b and 14c positioned inward from the forming pads 16 provided on the outermost side as the slide plate 8 descends. The cushioning means 17 which supports the shaping | molding pad 16 and each shaping | molding punch 14a, 14b, 14c so that it may descend | fall to the structure is provided in the frame 18. As shown in FIG.

In one embodiment of the present invention, the cushioning means is provided with a cylinder block 19 fixed to the frame 18, a cylinder pad 19 installed in the cylinder block so as to be liftable, and a molding pad 16 or a respective molding punch 14a (above). 14b) 14c, a plurality of pistons 21a, 21b, 21c and 21d to which cushion pins 20a, 20b, 20c and 20d connected to the bottom face are fixed, and the bottoms of the respective pistons. A hydraulic tank 23 for supplying the hydraulic pressure generated by the hydraulic lines 22a, 22b, 22c, and 22d formed in the fork cylinder block, and a plurality of oil tanks independently connected between the hydraulic tank and each hydraulic line of the cylinder block. Solenoid valves 25a, 25b and 25c which are provided on the oil supply pipes 24a, 24b, 24c and 24d and are released on the respective oil supply pipes to release the hydraulic pressure acting in the cylinder block upon detection of the sensing means. It consists of 25d.

However, as the cushioning means 17 supporting the forming pads 16 and the forming punches 14a, 14b and 14c is lowered by the upper die 3 using elastic means such as springs, the forming punches are sequentially lowered. It can be understood that it can be configured to.

In addition, within the stroke range of the slide plate 8 on which the upper die 3 is mounted, a detection means 26 is installed to detect the rise and fall of the slide plate 8 to drive the cushion means 17. .

In one embodiment of the present invention, the sensing means 26 is provided on the vertical rods 27 provided in the lifting range of the slide plate 8, and the vertical rods located at the top dead center and the bottom dead center of the slide plate. A plurality of detection sensors (29a) is installed on the lower limit detection sensor 28a, 28b and the vertical rod positioned between the upper and lower limit detection sensors to detect the cushion means 17 to operate as the slide plate descends. 29b) and 29c.

In this case, the upper and lower limit sensors 28a, 28b and 29a, 29b, 29c are applied as limit switches, but they can be applied as photosensors or other various types of sensors.

Referring to the operation of the present invention configured as described above is as follows.

First, before describing the operating state of the present invention, a plurality of molding dies and molding punches for convenience, 1,2,3,4th molding dies 9a, 9b, 9c, 9d and molding punches according to the processing order. 14a, 14b, 14c, and 14d.

When power is applied to operate the press, a hydraulic motor (not shown) is driven to pump oil in the hydraulic tank 23 so that the oil in the hydraulic tank is supplied to each oil supply pipe 24a, 24b, 24c ( 24d) and the hydraulic lines 22a, 22b, 22c and 22d are supplied to the cylinder block 19 side to raise the pistons 21a, 21b, 21c and 21d installed in the cylinder block at the same time. Cushion pins 20a, 20b, 20c, and 20d fixed to the pistons form the bottom of the molding pad 16 and the first, second, and third molding punches 14a, 14b, and 14c as shown in FIG. 4a. You will be supported.

At this time, the solenoid valves 25a, 25b, 25c, and 25d provided on the oil supply pipes 24a, 24b, 24c, and 24d are kept in an on state, so that the cylinder block 19 There is always a constant pressure inside the).

In this state, when the lower switch 31 of the control unit 30 is pressed while the material is loaded on the upper surface of the forming pad 16, the slide plate 8 drives the guide rod 7 by driving the main cylinder 32. As it descends along, the upper die 3 mounted on the slide plate 8 is lowered.

As such, when the upper die 3 is lowered and the primary molding die 9a positioned at the lowermost end is connected to the molding pad 16 to clamp the material 15, the slide plate 8 is placed on the vertical rod 27. Since the limit switch, which is the first detection sensor 29a installed, is operated, the solenoid valve 25a provided on the oil supply pipe 24a is turned off, and thus the piston 21a located on the outermost side of the cylinder block 19 is turned off. Since the applied pressure is released and the cushion pin 20a supporting the bottom surface of the forming pad 16 is lowered, the material 15 is blanked and the primary forming die 9a and the primary forming as shown in FIG. 4B. Primary drawing is performed by the punch 14a.

If the upper die 3 continues to descend in the state in which the raw material is first drawn by the operation as described above, the second detection sensor 29b positioned on the vertical rod 27 while the slide plate 8 descends as described above. ), The solenoid valve 25b provided on the oil supply pipe 24b is turned off, and the pressure acting on the piston 21b of the cylinder block 19 is released to release the primary forming punch 14a. Since the cushion pin 20b which supported the bottom of the () is lowered, the cylindrical container in the semi-finished state is second drawn by the secondary shaping die 9b and the secondary shaping punch 14b as shown in FIG. 4C.

If the upper die 3 is further lowered in the state shown in FIG. 4C by the continuous driving of the main cylinder 32, the slide plate 8 continues to descend to operate the third sensor 27c of the vertical rod 27. Therefore, the solenoid valve 25c provided on the oil supply pipe 24c is turned off, and the pressure applied to the piston 21c of the cylinder block 19 is released, thereby cushioning the bottom face of the secondary forming punch 14b. Since the pin 20c is lowered, the cylindrical container in the semi-finished state is third drawn by the tertiary forming die 9c and the tertiary forming punch 14c as shown in FIG. 4D.

As the upper die 3 descends, the cylindrical die is semi-processed by the primary, secondary and tertiary forming dies 9a, 9b and 9c and the forming punches 14a, 14b and 14c. When further lowered, the cylindrical container is finally formed by the fourth molding die 9d and the fourth molding punch 14d as shown in FIG. 4E, and the ejection pad 11 elastically installed with the spring 12 compresses the spring. It is pushed upward by the cylindrical container.

When the upper die 3 reaches the bottom dead center by operating the lower limit switch 28b positioned at the bottom dead center of the vertical rod 27, the upper die lowered to the bottom dead center is raised. The solenoid valves 25a, 25b, 25c and 25d are turned on at the same time to raise the molding pad 16 and the primary, secondary and tertiary molding punches 14a, 14b and 14c simultaneously. The cylindrical container sandwiched by the fourth shaping punch 14d is taken out from the shaping punch.

In this way, the molded article taken out from the fourth forming punch 14d is taken out from the upper die 3 since the takeout pad 11 is lowered by the restoring force of the spring 12 when the upper die 3 is located at the top dead center. Ascending to the top dead center of the upper die is made possible by operating the upper limit detection sensor 28a installed on the vertical rod 27 by the slide plate 8.

That is, the present invention is blanked by a plurality of molding dies 9a, 9b, 9c, 9d and molding punches 14a, 14b, 14c and 14d while the upper die 3 is lowered once. Since the material 15 is deep drawn sequentially, the deep cylindrical container can be molded in a single process.

In the exemplary embodiment of the present invention, a process of forming a deep cylindrical container by using four molding dies and molding punches has been described, but the number of installation of the molding dies and molding punches may be reduced or reduced depending on the depth and diameter of the cylindrical container. In other words, it can be understood that it can be extended and applied.

As described above, the present invention has the following advantages over the conventional press mold.

First, the process shortening will minimize the investment of mold and equipment cost and solve the labor shortage in the reality of avoiding the 3D industry, and will greatly reduce the production cost due to the reduction of expensive labor cost. do.

Secondly, the need for a waiting place for semi-finished products between processes by multi-process operation makes it possible to produce cylindrical containers even if the factory area is narrow.

Third, since the finished product is produced in one step from the loading of the material, the incidence of safety accidents is remarkably reduced as compared with the conventional molding, which is carried out several times by hand.

Fourth, because it prevents the work hardening of the product generated by the multi-process manual work it will shorten the separate heat treatment process.

Fifth, since the cylindrical container is molded in one press in one press mold, the concentricity of the molded finished product can be constantly maintained, and thus the quality of the finished product is greatly improved.

Claims (4)

In a press die equipped with a molding die mounted on a slide plate of the upper plate, and a molding pad and a punch in the lower mold, a plurality of forming dies mounted on a slide plate provided to be elevated on the upper mold and having a gradually smaller inner diameter toward the upper side; A center forming punch fixed to the center of the lower mold, a plurality of forming punches installed on the lower mold and configured to have a larger outer diameter corresponding to the forming die installed on the upper mold toward the outside of the center forming punch, and the lowering of the slide plate; Cushion means provided in the frame to support the forming pad and each forming punch so that the forming punch located inward from the forming pad provided on the outermost side sequentially descends, and is provided within the stroke range of the slide plate to raise and lower the slide plate. As sensing means for driving the cushion means Molding apparatus of the deep cylindrical vessel, characterized in that a generated. The method of claim 1, The cushioning means includes a cylinder block fixed to the frame, a plurality of pistons fixed to the cylinder block, the cushion pins being fixed to a molding pad or a bottom of each forming punch, and a bottom of each piston. A hydraulic tank for supplying hydraulic pressure generated by a hydraulic line formed in the cylinder block through the plurality of oil supply lines, a plurality of oil supply pipes independently connected between the hydraulic tank and each hydraulic line of the cylinder block, and installed on the respective oil supply pipes. Molding apparatus for a deep cylindrical container, characterized in that consisting of a solenoid valve for releasing the hydraulic pressure acting in the cylinder block in accordance with the detection of. The method of claim 1, The sensing means may be provided on a vertical rod disposed between a vertical rod disposed within a lifting range of a slide plate, upper and lower limit sensors installed on vertical bars positioned at a top dead center and a bottom dead center of the slide plate, and on a vertical rod positioned between the upper and lower limit sensors. Apparatus for forming a deep cylindrical container, characterized in that composed of a plurality of sensors for detecting the cushion means is operated as the slide plate is lowered. The method of claim 3, wherein The upper and lower limit sensor and the sensor is a deep cylindrical container molding apparatus, characterized in that the limit switch for detecting the rising and falling of the slide plate.