KR101969592B1 - Device for press molding - Google Patents

Abstract

The present invention relates to a device for press-molding implemented to press-mold a workpiece by strongly pressing a mold, which is a basic frame of molding, in a downward direction. The device for press-molding comprises: a press main body part whose inside is formed of an empty rectangular shape; and a pressurized press part which moves upward and downward in an inner space of the press main body part and press-molds the workpiece placed in a lower space of the press main body part by the mold fastened to a lower side.

Description

Press Forming Equipment {DEVICE FOR PRESS MOLDING}

The present invention relates to a press molding apparatus, and more particularly, to a press molding apparatus embodied to press-mold a workpiece by pressing a mold, which is a basic frame of molding, in a downward direction.

An injection molding machine or a press machine (hereinafter referred to as a 'molding press device') uses a molding space formed between an upper mold and a lower mold to perform press work such as drawing, bending, cutting, or injection. Perform molding operations.

The molding press apparatus must open or close the molding space on a regular basis. To this end, a conveying means for conveying the slide member having the upper mold fixed thereto, and pressing the upper mold toward the lower mold to facilitate the molding operation. Pressing means for pressurizing are required.

For example, a conventional molding press apparatus includes a slide member comprising a plurality of guide rods installed in parallel at a predetermined interval, an upper fixing plate installed at an upper end of the guide rod, and a lower fixing plate provided at a lower end of the guide rod.

The slide member is installed between the upper fixing plate and the lower fixing plate, and is installed to be movable up and down by a frame made up of an intermediate fixing plate through which a plurality of guide rods penetrate, and a plurality of supporting bars supporting the intermediate fixing plate at a predetermined height from the ground. .

An upper mold is installed on a lower surface of the upper fixing plate, and a lower mold is installed on an upper surface of the intermediate fixing plate fixed to the frame. Therefore, a molding space is formed between the upper mold and the lower mold.

A high speed transfer cylinder is installed between the intermediate fixing plate and the lower fixing plate as a transfer means for transferring the slide member at high speed. In addition, a pressure cylinder is installed on a lower surface of the intermediate fixing plate as pressing means for pressing the slide member to press the upper mold toward the lower mold.

Accordingly, in the related art, the rod of the pressure cylinder may be fixed or released using the clamp. For example, when the slide member moves up and down according to the action of the high speed transfer cylinder, the clamp is released to allow the rod to move freely. On the contrary, when pressing the upper mold toward the lower mold, by tightening the clamp to fix the rod of the pressure cylinder, the rod of the pressure cylinder is supported to press the slide member downward.

However, the conventional press device, after manufacturing the first processed product, the collected second processed product must be collected and transported to the second press device, so that the work is very cumbersome and the time required for the production of the product increases This occurred.

In addition, there is a problem that the manufacturing cost of the mold can be increased because the thickness of the mold cannot be increased because the detachment for fastening the mold or the workpiece is not easy.

On the other hand, the background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention. .

Korean Patent Registration No. 10-0631482 Korean Patent Publication No. 10-1996-0007164

One side of the present invention is press molding the workpiece to be pressed by pressing the mold that is the basic frame of the molding in a downward direction, and press molding implemented to form a jig for fastening the mold to the lower side of the pressing portion which is moved up and down in the press Provide the device.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

Press forming apparatus according to an embodiment of the present invention, the press main body portion is formed in the form of a hollow "ㅁ"; And a pressurizing press part which moves upward and downward in an inner space of the press main body part and presses a workpiece placed in a lower space of the press main body part by a mold fastened to a lower side.

In one embodiment, the pressurizing press portion, the pressurizing portion for moving to the lower direction in the inner space of the press main body portion by pressing the workpiece with a mold fastened to the lower side; A pressurizing cylinder installed at an upper side of the inner space of the press main body and configured to move the pressurizing unit disposed at a lower side in an up and down direction in an inner space of the press main body; And a fastening part installed at a lower end of the pressing part to fasten a mold for pressing and pressing a workpiece, wherein the fastening part is spaced apart from each other at predetermined intervals in a horizontal direction along a lower surface of the pressing part. Guide groove; It is formed of a bolt head and a bolt screw extending downward from the bolt head and forming a thread along the outer surface, the bolt head is inserted into one of the plurality of guide grooves corresponding to the shape of the mold to be fastened A sliding bolt that is moved; A jig through which the bolt screw exposed to the lower side of the guide groove penetrates and is inserted in a vertical direction and fastens a mold disposed below the pressing unit; And a fastening bolt for fastening the bolt screw from the lower side to fix the jig to the mold when the jig fastens the mold, and the guide groove has the bolt head to prevent the sliding bolt from being separated. The upper space in which the sliding movement is formed is wider than the diameter of the bolt head, the lower outlet through which the bolt screw is exited is formed narrower than the diameter of the bolt head, the jig is formed in the left and right male direction to fasten the mold Fastening jig; And a rotational jig installed to be rotatable in the inner space of the fastening jig, the rotational jig forming a through hole for penetrating and inserting the bolt screw in the vertical direction. The rotational jig includes a through hole in the vertical direction. A screw insertion tube of a pipe shape to be formed; A first fastening protrusion formed in a disc shape upright in a vertical direction and formed on an upper side of the screw insertion tube; And a second fastening protrusion formed in a disc shape upright in a vertical direction, the second fastening protrusion formed on the other side of the upper part of the screw insertion tube, wherein the fastening jig is formed in a left and right male direction to fasten a mold; A rotation hole which penetrates the jig body in the vertical direction and is formed to form a space in which the screw insertion tube is installed to rotate; A first fastening groove formed in a horizontally horizontal direction in a form corresponding to the shape of the first fastening protrusion on one side of the upper part of the rotation hole to insert and fasten the first fastening protrusion; And a second fastening groove formed in a horizontally horizontal direction in a form corresponding to the shape of the second fastening protrusion on the other side of the upper part of the rotation hole to insert and fasten the second fastening protrusion, A lower frame having at least one column having a variable length on an upper surface thereof; An upper frame supported by the at least one pillar and disposed in parallel with the lower frame; And a hydraulic jack installed between the lower frame and the upper frame and lifting the upper frame by using an external force provided by a user to lift an object seated on the upper frame. And a movable lifting device having a hydraulic jack for moving after seating on the upper side, wherein the hydraulic jack includes: a body in which working fluid is stored, and an inner cylinder and a lifting piston are disposed; Is installed on the outside of the main body is in communication with the main body to maintain a closed state, there is a pressure piston is formed therein, the working fluid is sucked as the pressure piston is raised and the suction sucked as the pressure piston is lowered An outer cylinder providing a working fluid to the inner cylinder; A pressure lever connected to a pressure piston disposed inside the outer cylinder to transfer an external force provided from a user to the pressure piston; And a release valve for releasing pressure of the inner cylinder according to a user's operation to recover the working fluid introduced into the inner cylinder to the main body, wherein the outer cylinder is provided in plural numbers, and the plurality of outer cylinders A first outer cylinder formed along a central axis coaxial with the pressure lever and at least one second outer cylinder disposed around a diameter of the first outer cylinder, wherein the first outer cylinder and the at least one second The sum of the diameters of the outer cylinders is equal to or less than one third of the diameter of the inner cylinders, and the first outer cylinder and the at least one second outer cylinder are connected to each other through an inlet pipe through which the working fluid stored in the main body is introduced. Connected to the main body, the hydraulic jack is formed in each of the first outer cylinder and at least one second outer cylinder Selectively opening and closing the inlet pipe of the can may further include a control means for varying the strength W of the pressure piston.

According to one aspect of the present invention, by forming a jig for fastening the mold to the lower side of the pressing portion which is moved up and down in the press, it is possible to manufacture a thin thickness of the mold to imprint the workpiece to minimize the cost according to the mold production It can provide an effect that can be made.

1 and 2 are diagrams showing a schematic configuration of a press forming apparatus according to an embodiment of the present invention.
3 is a view illustrating the pressurization press part of FIG. 1.
4 and 5 are views showing the fastening portion of FIG.
6 is a view showing a jig of FIG.
Figure 7 is a perspective view of a mobile lifting device equipped with a hydraulic jack according to an embodiment of the present invention.
8 is a perspective view showing a specific configuration of the hydraulic jack shown in FIG.
FIG. 9 is a conceptual diagram for describing an internal configuration and an operating principle of the hydraulic jack illustrated in FIGS. 7 and 8.
10 is a view showing the outer cylinder and the connecting portion.
11 is a perspective view showing a mobile lifting device equipped with a hydraulic jack according to another embodiment of the present invention.
12 to 14 is a perspective view showing a hydraulic jack according to another embodiment of the present invention.
15 is a perspective view showing a movable lifting device equipped with a hydraulic jack according to another embodiment of the present invention.
16 is a view illustrating the elastic support of FIG. 15.
17 is a view illustrating the first plate of FIG. 16.
18 is a flowchart illustrating a plastic sheet manufacturing method for producing a plastic sheet of the present invention.
FIG. 19 is a view illustrating the load distribution part of FIG. 15.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

1 is a view showing a schematic configuration of a press forming apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the press molding apparatus 10 according to the exemplary embodiment of the present invention includes a press main body part 100 and a pressurizing press part 200.

The press main body part 100 is formed in a shape of an empty "wh", and presses the work 2 placed in the lower space while the pressure press part 200 installed therein moves upward and downward.

The pressurizing press part 200 moves up and down in the inner space of the press main body part 100, and moves the workpiece 2 placed in the lower space of the press main body part 100 with the mold 1 fastened to the lower side. Press to mold.

That is, the pressurizing press part 200 is fastened to the mold 1 by using the fastening part 230 described later on its lower side, as shown in FIG. 1, and of the internal space of the press body part 100. As shown in FIG. 2, the mold 1 is driven to press-form the workpiece 2 by pressing the workpiece 2 downward in the direction of the workpiece 2 placed below.

The workpiece 2 of the present invention can be moved to the press main body 100 using the movable lifting device 20, 30, 40 equipped with the hydraulic jack described below with reference to FIG.

In the press-molding apparatus 10 having the above-described configuration, the jig for fastening the mold 1 to the lower side of the pressurizing press part 200 is formed, whereby the thickness of the mold for cutting out the workpiece 2 is made thin. It can be manufactured to minimize the cost of mold making.

3 is a view illustrating the pressurization press part of FIG. 1.

Referring to FIG. 3, the pressurizing press part 200 includes a pressurizing part 210, a pressurizing cylinder 220, and a fastening part 230.

The pressurizing part 210 is provided with a pressurizing cylinder 220 on the upper side, and moves downward in the inner space of the press main body part 100 according to the driving by extension or contraction of the pressurizing cylinder 220 and fastened to the lower side. Pressing the workpiece (2) with the mold (1), or by lifting up again to the workpiece (2) is completed to form the separation.

At this time, the mold 1 is fastened by the fastening part 230 to the lower side of the pressing part 210.

The pressurizing cylinder 220 is provided above the inner space of the press main body part 100, and moves the pressurizing part 210 provided at the lower side up and down in the inner space of the press main body part 100 according to the driving by extension or contraction. Move it in the direction.

The fastening part 230 is installed at the lower end of the pressurizing part 210 to fasten the mold 1 for pressing and pressing the work piece 2.

The pressurizing press unit 200 having the above-described configuration may further include at least one auxiliary frame 240.

The auxiliary frame 240 is installed by the fastening part 230 at the lower side of the pressing part 210, and has the same configuration of each of the fastening parts 230 described later in FIGS. 4 and 5 below. The fastening position of the mold 1 is adjusted.

That is, when the auxiliary frame 240 needs to be installed as low as a predetermined height in the downward direction of the pressing unit 210 according to the user's needs or due to the shape of the mold 1, the pressing unit 210. By attaching to the lower side of the), the installation position of the mold 1 is adjusted according to the needs of the user.

4 and 5 are views showing the fastening portion of FIG.

4, the fastening part 230 includes a plurality of guide grooves 231, sliding bolts 232, at least one jig 233, and fastening bolts 234.

The guide grooves 231 are formed to be spaced apart from each other at predetermined intervals (for example, 10 cm to 30 cm, etc.) in the horizontal direction along the lower side of the pressing unit 210, and the bolt heads of the sliding bolt 232 ( 2321 is inserted to form a space that can move in the horizontal direction.

In one embodiment, the guide groove 231, the upper space in which the bolt head 2321 is slidingly moved so as to prevent the sliding bolt 232 from being separated is formed wider than the diameter of the bolt head 2321, the bolt The lower outlet through which the screw 2232 can exit can be formed narrower than the diameter of the bolt head 2321.

The sliding bolt 232 is formed by a bolt screw 2232 extending downward from the bolt head 2321 and the bolt head 2321 and forming a thread along an outer surface thereof, in the form of a mold 1 to be fastened. In response to the bolt head 2321 is inserted into one of the plurality of guide grooves 231 is moved.

In the jig 233, the bolt screw 2232 exposed to the lower side of the guide groove 231 penetrates and is inserted in the vertical direction, and fastens the metal mold 1 disposed below the pressing unit 210.

The fastening bolt 234 fastens the bolt screw 2232 from the lower side so that the jig 233 can fix the jig 233 to the mold 1 when the jig 233 fastens the mold 1.

6 is a view showing a jig of FIG.

Referring to FIG. 6, the jig 233 includes a fastening jig 2233 and a rotation jig 2332.

The fastening jig 2331 is formed in the left-right male direction to fasten the mold 1, and the rotating jig 2332 is installed in the internal space so as to be rotatable.

That is, the fastening jig 2331 presses the lower one side of the mold 1 to one side, and is supported on the lower side of the pressing unit 210 to the other side, so that the mold 1 is fastened to the lower side of the pressing unit 210. Be sure to

In one embodiment, the fastening jig 2331 may include a jig body 2331-1, a rotation hole 2331-2, a first fastening groove 2331-3, and a second fastening groove 2331-4. Can be.

The jig body 2331-1 is formed in a left and right male direction to fasten the mold 1, and a rotation hole 2331-2 for inserting the screw insertion tube 2332-1 is formed at a lower side thereof, and on one side thereof. The first fastening groove 2331-3 is formed, and the second fastening groove 2331-4 is formed at the other side.

The rotation hole 2331-2 penetrates the jig body 2331-1 in the vertical direction, and forms a space in which the screw insertion tube 2332-1 is installed and rotated.

The first fastening groove 2331-3 penetrates in the horizontal direction in the horizontal direction in a form corresponding to the shape of the first fastening protrusion 2332-2 (ie, a disk shape) on one side of the upper part of the rotation hole 2331-2. Thus, the first fastening protrusion 2332-2 is inserted and fastened.

The second fastening groove 2331-4 penetrates to the other side of the upper part of the rotation hole 2331-2 in the horizontal direction in the form corresponding to the shape of the second fastening protrusion 2332-3 (that is, in the form of a disk). The second fastening protrusion 2332-3 is formed and fastened.

That is, the first fastening groove 2331-3 and the second fastening groove 2331-4 rotate after the first fastening protrusion 2332-2 or the second fastening protrusion 2332-3 of the disk shape is fastened. By doing so, the screw insertion pipe 2332-1 connected to the first fastening protrusion 2332-2 and the second fastening protrusion 2332-3 can be rotated about the shaft.

The rotation jig 2332 is rotatably installed in the internal space of the fastening jig 2331, and forms a through hole for penetrating and inserting the bolt screw 2232 in the vertical direction, and the bolt screw 2232 is The fastening bolt 234 is fastened from the exposed lower side.

In one embodiment, the rotating jig 2332 may include a screw insertion tube 2332-1, a first fastening protrusion 2332-2, and a second fastening protrusion 2332-3.

The screw insertion tube 2332-1 is formed in a pipe shape to form a through hole in the up and down direction, and a bolt screw 2232 is inserted thereinto, and a fastening protrusion 2332-2 is installed at one upper side thereof, and at the other upper side thereof. The second fastening protrusion 2332-3 is provided.

The first fastening protrusion 2332-2 is formed in a disc shape upright in the vertical direction, and is formed to face the second fastening protrusion 2332-3 on an upper side of the screw insertion tube 2332-1. It is fastened to the first fastening groove 2331-3 and rotates.

The second fastening protrusion 2332-3 is formed in a disc shape upright in the vertical direction, and is formed to face the first fastening protrusion 2332-2 on the other side of the upper portion of the screw insertion tube 2332-1. , Is rotated by being fastened to the second fastening groove 2331-4.

Thereby, the fastening jig 2331 can be fastened by the rotational jig 2332 corresponding to the height of the fastening position of the metal mold 1, so that the metal mold 1 of various sizes can be fastened more easily.

The jig 233 having the above-described configuration, by fastening the mold 1 to the lower side of the pressing portion 210, so that the thickness of the mold (1) to take out the workpiece (2) can be made thinner The cost can be minimized by production.

Figure 7 is a perspective view of a mobile lifting device equipped with a hydraulic jack according to an embodiment of the present invention.

Specifically, the movable lifting device 20 equipped with the hydraulic jack according to an embodiment of the present invention is a device capable of moving the workpiece 2 to the press main body 100, and to the press main body 100. It is used to move the work piece 2 or to place the work piece 2, which has been pressure-molded, on the upper side, and to be moved to another place, and includes a lower frame 310, an upper frame 320, and a hydraulic jack 400. Can be.

The lower frame 310 is a member constituting the lower surface of the movable lifting device 20. The lower surface of the lower frame 310 is provided with a moving means 330, the movable lifting device 20 equipped with a hydraulic jack according to the present invention can be guaranteed mobility.

At least one pillar 340 may be disposed on the upper surface of the lower frame 310.

As shown, four pillars 340 may be provided in the corner portion of the lower frame 310, but is not limited to the number of installation.

The pillar 340 may be provided in a form in which the length may vary. For example, the pillar 340 may include an outer pillar having a first diameter and an inner pillar having a diameter smaller than the first diameter and inserted into the outer pillar and sliding along the longitudinal direction of the outer pillar. In this case, the overall length of the pillar 340 is shortened when the inner pillar is slid in the direction in which it is inserted into the outer pillar, and the overall length of the pillar 340 may be increased when the inner pillar is slid in the direction that protrudes from the outer pillar. However, the pillar 340 need not be limited to the above-described configuration, and may be replaced with other conventional configurations as long as the length can be changed by an external force.

The upper frame 320 may be supported from the lower frame 310 by at least one pillar 340 and disposed in parallel with the lower frame 310. An object to be lifted, that is, the workpiece 2 may be seated on the upper surface of the upper frame 320. When the length of the pillar 340 is increased, the upper frame 320 is lifted from the ground while the upper frame 320 is raised. The workpiece (2) seated in the) is lifted.

Hydraulic jack 400 is a device for providing a lifting force to such a pillar (340). Hydraulic jack 400 is installed between the lower frame 310 and the upper frame 320, in order to lift the object seated on the upper frame 320, variable length of the column 340 by using an external force provided by the user. By doing so, the upper frame 320 can be raised and lowered. In this regard, it will be described with reference to FIGS. 8 to 10 together.

FIG. 8 is a perspective view illustrating a specific configuration of the hydraulic jack 400 illustrated in FIG. 7, and FIG. 9 is a conceptual diagram illustrating an internal configuration and an operation principle of the hydraulic jack 400 illustrated in FIGS. 7 and 8.

Specifically, the hydraulic jack 400 according to an embodiment of the present invention, the main body 410, the outer cylinder 420, the pressure lever 430 and the release valve 440.

The main body 410 is a cylindrical member and has a space in which a working fluid can be stored, and an inner cylinder 411 and a lifting piston 412 may be disposed therein.

The inner cylinder 411 is a cylindrical member formed inside the main body 410, and a working fluid may be stored between the main body 410 and the inner cylinder 411.

The lifting piston 412 is a member installed in the inner cylinder 411 to reciprocate along the longitudinal direction of the inner cylinder 411. That is, when the working fluid is supplied to the inner cylinder 411, the length of the column 340 is increased while the lifting piston 412 is raised by the pressure of the working fluid, thereby contacting the upper portion of the lifting piston 412 The upper frame 320 may rise from the ground.

The outer cylinder 420 is a member for supplying a fluid to the inner cylinder 411, and may be connected to the main body 410 through the fastening bracket 415 so that the outer cylinder 410 is maintained in a sealed state. The pressure piston 421 is formed in the pressure piston 421, and the pressure piston 421 may be raised or lowered by the pressure lever 430.

The pressure lever 430 is a member connected to the pressure piston 421 to transfer the external force provided from the user to the pressure piston 421.

FIG. 10 is a view illustrating an outer cylinder 420 constituting the hydraulic jack 400 and a connecting portion 422 for coupling the pressure piston 421 and the pressure lever 430 of the outer cylinder 420. The pressure piston 421 formed inside the 420 is physically coupled to the pressure lever 430 through the connection portion 422, and due to this structural feature, the pressure piston 421 is provided by the user provided through the pressure lever 430. Can receive external force.

The pressure lever 430 has a through hole for coupling a member such as a pipe that can be gripped by the user, and thus the user moves the pipe up and down while the pipe is coupled to the pressure lever 430. Accordingly, an external force may be applied to the pressure lever 430. In another embodiment of the present invention, the pressure lever 430 may include the pipe described above or may be provided integrally with the pipe.

Looking at the specific operation principle of the hydraulic jack 400 according to an embodiment of the present invention, the user lifts the pressure lever 430 in a state in which the object to be raised hydraulic jack 400 is seated on the upper frame 320. When raised, the pressure piston 421 is raised to form a negative pressure in the outer cylinder 420. Accordingly, the working fluid stored between the main body 410 and the inner cylinder 411 may flow into the outer cylinder 420 along the suction pipe 451.

Then, when the user presses the pressure lever 430, the pressure piston 421 is lowered to apply pressure to the working fluid sucked into the outer cylinder 420. Thus, the working fluid sucked into the outer cylinder 420 may move to the inner cylinder 411 along the supply pipe 452. At this time, one end of the suction pipe 451 connected to the outer cylinder 420 side is provided with a non-return valve so that the working fluid can be pumped only along the supply pipe (452). The lifting piston 412 is raised by the pressure of the working fluid introduced into the inner cylinder 411. This process is repeated as the user raises and lowers the pressure lever 430, and as a result, as the pressure of the inner cylinder 411 gradually increases, the lifting piston 412 gradually rises to raise the lifting piston ( 412) The object on the top is lifted.

The release valve 440 is formed at one end of the supply pipe 452 and is a valve-shaped member for releasing the pressure of the inner cylinder 411 according to a user's operation. That is, when the user wants to lower the object to the original position, when the release valve 440 is opened, the high pressure charged working fluid introduced into the inner cylinder 411 receives gravity of the object through the recovery pipe 530. As the pressure of the lifting piston 412 is recovered to the main body 410, the lifting piston 412 is lowered by the gravity of the object while the pressure of the inner cylinder 411 is lowered, and the object may be lowered to its original position. .

As described above, the hydraulic jack 400 according to an embodiment of the present invention may lift or lower a heavy object by using a small force repeatedly applied to the pressure lever 430 from the user.

On the other hand, in another embodiment of the present invention, the user can adjust the magnitude of the pressure provided to the lifting piston 412 according to the type of the object and the type of work to be performed. In this regard, it will be described with reference to FIGS. 11 to 14 together.

11 is a perspective view showing a mobile lifting device equipped with a hydraulic jack according to another embodiment of the present invention.

Specifically, the movable lifting device 30 provided with the hydraulic jack according to another embodiment of the present invention includes a lower frame 310, an upper frame 320, and a hydraulic jack 400a.

At this time, the lower frame 310 and the upper frame 320 constituting the movable lifting device 30 equipped with a hydraulic jack according to another embodiment of the present invention shown in FIG. 11 is one embodiment of the present invention shown in FIG. Since it is the same as the lower frame 310 and the upper frame 320 constituting the movable lifting device 420 with the hydraulic jack according to the example, repeated description will be omitted.

On the other hand, the hydraulic lifting device 30 equipped with a hydraulic jack according to another embodiment of the present invention constitutes a mobile lifting device 30 equipped with a hydraulic jack shown in FIG. 7, the hydraulic jack according to an embodiment of the present invention ( 400 may be replaced with a hydraulic jack 400a according to another embodiment of the present invention. In this regard, it will be described with reference to FIGS. 12 to 14 together.

12 to 14 is a perspective view showing a hydraulic jack 400a according to another embodiment of the present invention.

12 is a perspective view of a hydraulic jack 400a according to another embodiment of the present invention, FIG. 13 is a view comparing an outer cylinder constituting the hydraulic jack 400a of FIG. 12, and FIG. 14 is a hydraulic jack (shown in FIG. 12). It is a conceptual diagram for explaining the internal structure and operation principle of 400a).

Specifically, the hydraulic jack 400a according to another embodiment of the present invention, the main body 410, the outer cylinder (420a, 420b, 420c, 620d, 620e, 620f), the pressure lever 430 and the release valve 440 Include.

At this time, the main body 410, the pressure lever 430 and the release valve 440 constituting the hydraulic jack 400a according to another embodiment of the present invention shown in Figure 9, one embodiment of the present invention shown in Figure 7 Since the main body 410, the pressure lever 430 and the release valve 440 constituting the hydraulic jack 400 according to the example, the repeated description will be omitted.

On the other hand, the hydraulic jack 400a according to another embodiment of the present invention may be characterized in that a plurality of outer cylinder 420 shown in FIG. That is, in the hydraulic jack 400a according to another embodiment of the present invention, a plurality of outer cylinders 420a, 620b, 420c, 420d, 420e, 420f, and 420g may be connected to the pressure lever 430. Referring to FIG. 11, the hydraulic jack 400a according to another embodiment of the present invention includes six outer cylinders 420b and 420c around the first outer cylinder 420a formed along a central axis coaxial with the pressure lever 430. 420d, 420e, 420f, and 420g are expressed as being disposed along the circumference of the first outer cylinder 420a, but the present invention is not limited thereto, and the number of the outer cylinders is not limited.

Each of the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g is provided in a cylindrical shape, and a pressure piston is formed therein, respectively. That is, when a user applies an external force to the hydraulic jack 400a by operating the pressure lever 430, the pressure lever 430 applies the external force provided to each of the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g. Can be distributed by).

In this case, when the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are all designed to have the same diameter, the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are delivered to each other. The external force may be uniformly distributed. As another example, when the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are designed to have different diameters, the external force may be transmitted in proportion to the size of the diameter.

In addition, the sum of the diameters of all the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g constituting the hydraulic jack 400a may be designed to be smaller than the diameter of the inner cylinder 411. Is preferably designed such that the sum of the diameters of the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, 420g is one third or less than the diameter of the inner cylinder 411. When the diameter of the outer cylinder is larger than the diameter of the inner cylinder 411, a force smaller than the magnitude of the external force applied to the outer cylinder can be transmitted to the inner cylinder 411.

A detailed operation principle of the hydraulic jack 400a according to another embodiment of the present invention will be described with reference to FIG. 14.

In FIG. 14, the hydraulic jack 400a according to another embodiment of the present invention is illustrated with three outer cylinders 420a, 420b, and 420c. However, as described above, FIG. 12 illustrates the hydraulic jack 400a of FIG. 10. As a conceptual diagram illustrating the operating principle, two outer cylinders or four or more outer cylinders may also be the same as or similar to the following operating principles.

When the user lifts the pressure lever 430 while the hydraulic jack 400a is in contact with the object under the object to be raised, the pressure pistons 421a, 421b, and 421c of the respective outer cylinders 420a, 420b, and 420c. As the) rises, a negative pressure is formed in the outer cylinder 420. Accordingly, the working fluid stored between the main body 410 and the inner cylinder 411 may flow into the outer cylinders 420a, 420b, and 420c along the suction pipes 451a, 451b, and 451c.

Then, when the user presses the pressure lever 430, the pressure piston (421a, 421b, 421c) is lowered to apply pressure to the working fluid sucked into the outer cylinder (420a, 420b, 420c). Accordingly, the working fluid sucked into the outer cylinders 420a, 420b, and 420c may move to the inner cylinder 411 along the supply pipes 452a, 452b, and 452c. The lifting piston 412 is raised by the pressure of the working fluid introduced into the inner cylinder 411. This process is repeated as the user raises and lowers the pressure lever 430, and as a result, as the pressure of the inner cylinder 411 gradually increases, the lifting piston 412 gradually rises to raise the lifting piston ( 412) The object on the top is lifted.

At this time, the hydraulic jack 400a according to another embodiment of the present invention controls the opening and closing of the shutoff valves 4511a, 4511b, 4511c and the shutoff valves 4511a, 4511b, 4511c installed at one end of the suction pipes 451a, 451b, 451c. It may further include a control means (not shown).

The control means (not shown) may be provided in the form of a control circuit disposed inside the fastening bracket 415 and may be electrically connected to the shutoff valves 4511a, 4511b, and 4511c. In this case, the control means (not shown) may open and close the respective shutoff valves 4511a, 4511b, and 4511c according to the user's operation.

Equation 1 is a formula representing a force (W) applied to the lifting piston 412, the lifting force (W) acting on the lifting piston 412 is pressed against the diameter (D) of the lifting piston 412 It may be determined by the ratio of the sum d of the diameters of the pistons 421a, 421b, and 421c and the external force w applied to the pressure pistons 421a, 421b, and 421c.

That is, when the user transmits the external force w of a predetermined size through the pressure lever 430 to the hydraulic jack 400, the lifting force of the lifting piston 412 is the pressure piston (D) for the diameter D of the lifting piston 412. It may vary depending on the ratio of the diameter d of the 421a, 421b, and 421c. Here, the diameter D of the lifting piston 412 is determined according to the diameter of the inner cylinder 411, and the sum d of the diameters of the pressure pistons 421a, 421b, and 421c is the outer cylinders 420a, 420b, and 420c. As a result, the lifting force W acting on the lifting piston 412 depends on the ratio of the diameter sum of the outer cylinders 420a, 420b, and 420c to the diameter of the inner cylinder 411. Can be variable.

Therefore, the hydraulic jack 400a according to another embodiment of the present invention selectively controls the opening and closing of the shutoff valves 4511a, 4511b, and 4511c by a control means (not shown) to the outer cylinders 420a, 420b, and 420c. It is possible to adjust the amount of the working fluid flows in, and to increase the lifting force of the lifting piston 412 by applying pressure to the working fluid only through the pressure piston (421a, 421b, 421c) isolating valve (4511a, 4511b, 4511c) is open. It can be adjusted.

For example, when only the first shutoff valve 4511a is closed according to a user's control means (not shown), the external force applied to the working fluid is operated when all the shutoff valve valves 4511a, 4511b, and 4511c are opened. Only two thirds of the external force w applied to the fluid can be transmitted. In other words, the diameters of the outer cylinders 420a, 420b, and 420c may be varied according to the control of the control means (not shown) to have the effect of adjusting the lifting force W of the lifting piston 412. It is possible to adjust the lifting height of the hydraulic jack 400 according to the one-time operation of the pressure lever 430 according to the type of the object to be raised or the type of work to be performed after lifting the object.

In some other embodiments, control means (not shown) may automatically determine the shut-off valve valves 4511a, 4511b, 4511c to open and close.

For example, the control means (not shown) opens only one shut-off valve valve 4511a, 4511b, 4511c from the initial operation time of the hydraulic jack 400a until the pressure lever 430 is operated a predetermined number of times. From the time when the pressure lever 430 is operated more than a predetermined number of times, the plurality of shutoff valve valves 4511a, 4511b, and 4511c may be controlled to be opened. More specifically, the control means (not shown) allows only the first shut-off valve 4511a to be opened until the pressure lever 430 is operated for the first five times, and until the pressure lever 430 is operated for 6 to 10 times. The first shutoff valve 4511a and the second shutoff valve 4511b may be opened, and at least 11 times, all the shutoff valves 4511a, 4511b, and 4511c may be controlled to open. In general, when lifting an object using the hydraulic jack 400a, there are not many kinds of tasks that cannot be performed at a low height. Therefore, if the object is initially raised at a high speed and then rises to an appropriate height, the height of the object is raised. It needs to be finely adjusted. In this case, according to the above-described feature of the present invention, in the state where only one shutoff valve is opened, the object is raised at a high speed within a relatively fast time, and then gradually increases as the number of shutoff valves that are opened increases as time passes. The rate of ascent may decrease. Therefore, even if the user always operates the hydraulic jack 400a with a constant magnitude of force, the user has the effect of varying the rising height of the object.

As another example, the control means (not shown) may automatically determine the shutoff valve valves 4511a, 4511b, and 4511c to be opened and closed according to the weight of an object disposed on the hydraulic jack 400a.

To this end, the hydraulic jack 400a according to some other embodiments may be further provided with a weight sensing means (not shown).

The weight sensing means (not shown) detects the weight of the object disposed above the hydraulic jack 400a and transmits the weight to the control means (not shown), and the control means (not shown) transfers the size of the detected weight to a predetermined critical section. The shutoff valves 4511a, 4511b, and 4511c of the shutoff valves may be determined according to the comparison result.

For example, if it is determined that the control means (not shown) is included in the first critical section in which the weight of the object is relatively light, all of the shutoff valves 4511a, 4511b, and 4511c are opened to open the pressure lever 430 of the user. The lifting height of the hydraulic jack 400 according to the rotation operation can be controlled to be relatively low. On the other hand, if it is determined that the control means (not shown) is included in the second critical section where the object is relatively heavy, one operation of the pressure lever 430 of the user by opening the at least one shutoff valves 4511a, 4511b, and 4511c. The lifting height of the hydraulic jack 400 can be controlled to be relatively low. This is because when the weight of the object is relatively light, the object may leave the hydraulic jack 400a in the ascending process, and when the weight of the object is relatively heavy, the possibility of leaving the hydraulic jack 400a in the ascending process is relatively low as well. This is because a lot of climbing power is required.

As such, the hydraulic jack 400a according to another embodiment of the present invention may allow efficient work using the hydraulic jack 400a by varying the lifting force of the lifting piston 412 according to the type of object or the type of work. .

15 is a perspective view showing a movable lifting device equipped with a hydraulic jack according to another embodiment of the present invention.

Specifically, the movable lifting device 40 provided with the hydraulic jack according to another embodiment of the present invention includes a lower frame 310, an upper frame 320, a hydraulic jack 400, and a drop preventing unit 700.

At this time, the lower frame 310, the upper frame 320 and the hydraulic jack 400 constituting the movable lifting device 40 with a hydraulic jack according to another embodiment of the present invention shown in FIG. 15 is shown in FIG. Since the same as the lower frame 310 and the upper frame 320 constituting the movable lifting device 20 provided with a hydraulic jack according to an embodiment of the present invention, repeated description will be omitted.

The drop prevention unit 700 is installed at both sides of the hydraulic jack 400 to support the upper frame 320 when the upper frame 320 falls to prevent the hydraulic jack 400 from being damaged.

In one embodiment, the fall prevention part 700 may include an elastic support part 500 and a load distribution part 600.

Referring to FIG. 16, the elastic support part 500 is installed on the upper side of the load distribution part 600 so as to prevent the falling object from colliding with the hydraulic jack 400 and damaging the hydraulic jack 400. When the fall is to support the upper frame 320 by using an elastic force, the support portion 510, a plurality of vibration absorbing portion 520, a plurality of connection plates 530, a plurality of extension plates 540, It may include four pivots 550 and two support bars 560.

The support part 510 includes a first plate 511, a second plate 512, a third plate 513, and a fourth plate 514 formed of a plate having a “b” shape.

At this time, the first plate 511, the second plate 512, the third plate 513 and the fourth plate 514 are spaced apart from each other so as to face each other to form an "+" shape as a whole. The vibration absorbing unit 520 may be installed in each space spaced apart from each other to absorb vibrations transmitted to each plate.

The vibration absorbing part 520 is provided between each plate of the support part 510 and another plate, respectively, and absorbs a vibration.

In one embodiment, the vibration absorbing portion 520 may be formed by means of an elastic material such as a spring or rubber that can absorb shocks, provided that the vibration absorbing portion 520 is applied regardless of its name. This will be possible.

The connecting plate 530 may include a third plate 513 between the upper part of the first plate 511 and the upper part of the second plate 512, between the front end of the second plate 512 and the front end of the third plate 513. The first plate 511 is rotatably installed between the bottom of the bottom plate and the bottom of the fourth plate 514 and between the front end of the fourth plate 514 and the front end of the first plate 511. The second plate 512, the third plate 513, and the fourth plate 514 are connected and installed in a “+” shape.

That is, the connecting plate 530 may not only interconnect the upper, lower, or front end of each plate to form an overall appearance, but also rotate each connecting portion to correspond to external vibrations or shocks. By adjusting the connection angle it is possible to more efficiently absorb vibration or shock.

That is, when the first plate 511, the second plate 512, the third plate 513 and the fourth plate 514 are fixed to each other by the connecting plate 530, the external vibration or impact to some extent It may be able to withstand, but when a critical vibration or a critical shock is applied, the connection plate 530 connected to each plate will be broken and it will not be able to perform its original function.

Accordingly, the connecting plate 530 according to the present invention, by connecting the first plate 511, the second plate 512, the third plate 513 and the fourth plate 514 to some extent possible movement. As described above, the fastening can be maintained more efficiently to vibration or shock than in the case described above.

The extension plate 540 includes an upper portion (ie, an upper wing) and a front end (ie, a front wing) of the first plate 511, an upper end and a front end of the second plate 512, and a front end of the third plate 513. The lower portion and the second portion extending from the lower portion and the front end of the fourth plate 514 to the rotating portion 550 for each plate in the upward or downward direction.

In one embodiment, the extension plate 540 may be rotated by the upper or lower is connected to the rotating shaft formed on one side of the rotating part 550.

In one embodiment, the extension plate 540, the second upper fastening groove (5113) or the second upper fastening groove (5113) or the second upper fastening groove (5113) so as to make a sliding movement in the vertical direction. A sliding groove 541 (see FIG. 17) in an up and down direction may be formed at a lower portion connected to the shear fastening groove 5115.

Rotating portion 550, the upper or lower portion of the two extending plate 540 extending from each plate is connected to each other and rotatably connected to each other, installed on each inner side of the support bar 560 facing each other ( Fastening means such as, for example, screw bolts, welding or rivets).

The support bar 560 is provided with an upper side or a lower side of the rotating part 550, and the support bar 560 positioned at an upper side thereof is spaced apart from the lower side of the upper frame 320 so that the upper frame 320 is positioned. When falling, it is supported, it is supported by the rotating part 550 to form a space spaced apart in the vertical direction so that each configuration of the elastic support 500 is installed.

The elastic support part 500 having the above-described configuration supports the upper frame 320 by using an elastic force when the upper frame 320 falls, such that the falling object collides with the hydraulic jack 400 so that the hydraulic jack 400 is closed. To prevent breakage.

17 is a view illustrating the first plate of FIG. 16.

Referring to FIG. 17, the first plate 511 may include a plate body 5111, two first upper fastening grooves 5112, a second upper fastening groove 5113, and two first shear fastening grooves 5114. And a second shear fastening groove 5115.

The plate body 5111 is formed of a plate of “b” shape, and forms two first upper fastening grooves 5112 and a second upper fastening groove 5113 on the upper wing, and two first upper fastening grooves on the front wing. The shear fastening groove 5114 and the second shear fastening groove 5115 are formed.

The first upper fastening groove 5112 is formed in the upper wing of the plate body 5111 formed in the upward direction to connect and install the front end of the connecting plate 530 so as to be rotatable.

The second upper fastening groove 5113 is formed between the first upper fastening grooves 5112 to connect and install a lower portion of the extension plate 540 so as to be rotatable.

The first shear fastening grooves 5114 are formed on the front blades of the plate body 5111 formed in the shear direction, and connect the upper ends of the connection plates 530 so as to be rotatable.

The second shear fastening groove 5115 is formed between the first shear fastening grooves 5114 to connect and install the lower portion of the extension plate 540 to be rotatable.

In one embodiment, the extension plate 540, the second upper fastening groove (5113) or the second upper fastening groove (5113) or the second upper fastening groove (5113) so as to make a sliding movement in the vertical direction. A sliding groove 541 in the up and down direction may be formed at a lower portion connected to the shear coupling groove 5115.

In addition, the connection plate 530 may also form a sliding groove having the same structure as the sliding groove 541 of the extension plate 540 described above.

The first plate 511 having the configuration as described above may be equally applied to the second plate 512, the third plate 513, or the fourth plate 514 that differ only in its installation position. The description of the second plate 512, the third plate 513, or the fourth plate 514 will be omitted.

The support bar 560 of FIG. 16 according to the present invention may be manufactured from a plastic sheet that is superior in formability and durable than a plastic sheet manufactured using PET resin alone.

The plastic sheet which concerns on this invention is manufactured by the following plastic sheet manufacturing method.

Referring to Figure 18, the plastic sheet manufacturing method for producing a plastic sheet of the present invention 100 parts by weight of polyethylene terephthalate (polyethylene telephthalate, PET) resin, 2 to 4 parts by weight of polyurethane (polyurethane) dispersant, polyethylene dioxy 0.1 to 0.2 parts by weight of offen polystyrene sulfonate, polystyrolsulfonic acid, 3 to 5 parts by weight of N-methyl-2-pyrrolidone, tree 0.1 to 0.3 parts by weight of ethyl amine (isopropyl alcohol), 42 to 45 parts by weight of isopropyl alcohol and 50 to 52 parts by weight of water are mixed to prepare a first composition (S110); A second step (S120) of preheating the mixed composition; A third step (S130) of removing moisture of the preheated mixed composition; A fourth step (S140) of heating the mixed composition from which moisture is removed; A fifth step (S150) of removing foreign substances of the heated mixed composition; A sixth step (S160) of manufacturing a plastic sheet by stretching while cooling the mixed composition from which foreign substances have been removed; And a seventh step of applying silicone to the plastic sheet and then drying it (S170).

According to the present invention, various additives may be mixed with a conventional PET resin, and preformed, dehumidified, heated, and cooled may be used to manufacture a plastic sheet having excellent moldability and durability.

The first step (S110) is a mixing step of the raw materials, the polyethylene terephthalate (polyethylene telephthalate, PET) resin as a base resin, polyurethane (polyurethane) dispersant, polyethylene dioxythiophene polystyrene sulfonate (polyethylene dioxythiophene polystyrene sulfonate ), Polystyrolsulfonic acid, N-methyl-2-pyrrolidone, triethyl amine, isopropyl alcohol and water Step.

PET resin is a basic resin, has excellent thermal stability and high crystallinity, can be recycled, and can be used in the form of a master batch. Polyurethane dispersants serve to improve the miscibility with other components. Polyethylene dioxythiophene polystyrene sulfonate, polystyrolsulfonic acid, N-methyl-2-pyrrolidone and triethyl amine Functions as an antistatic agent. Since the plastic sheet for manufacturing a plastic container is generally an electrical insulator, static electricity is generated by frictional charging, and if it is severely caused by discharge or electric conduction, it may lead to an explosion or fire, so it is preferable to add a charging agent. . Isopropyl alcohol acts as an antifogging agent. The antifogging agent can suppress water condensation caused by water vapor which may occur when the plastic container is manufactured using the plastic sheet to store fruits and the like.

In one embodiment, the above-described raw materials are based on 100 parts by weight of polyethylene telephthalate (PET) resin, 2 to 4 parts by weight of polyurethane dispersant, polyethylene dioxythiophene polystyrene sulfonate ) 0.1 to 0.2 parts by weight, 0.4 to 0.6 parts by weight of polystyrolsulfonic acid, 3 to 5 parts by weight of N-methyl-2-pyrrolidone, triethyl amine (triethyl amine) 0.1 to 0.3 parts by weight, isopropyl alcohol (42) to 45 parts by weight of isopropyl and 50 to 52 parts by weight of water is preferably mixed. When added outside the above range, various problems may occur. In particular, in the case of the antistatic agent, when mixed over each range, the plastic surface to be produced may be sticky, the sealing and printability may be reduced, in the case of white plastic, yellowing may occur.

In addition, the first step (S110) may be further mixed with various additional ingredients to the raw materials to enhance the functionality of the plastic sheet.

In one embodiment, the boron-based binder may be further mixed. The boron (B) -based binder is used to combine the respective components, the boron-based binder is preferably mixed in 2 to 10 parts by weight with respect to 100 parts by weight of PET resin. When the content of the boron-based binder is less than 2 parts by weight, the raw materials and the like cannot be effectively bound, and when the content of the boron-based binder exceeds 70 parts by weight, it is uneconomical.

In one embodiment, the garlic extract may be further mixed. Garlic extract is a natural adhesive component, and functions as a binder to improve the compatibility with other components along with the boron-based binder. The garlic extract is peeled and crushed garlic, 2 to 3 parts by weight of water per 1 part by weight of garlic, heated at 80-100 ℃ for 5 hours or more, the liquid component is extracted and filtered, and then filtered It can be prepared by concentrating the liquid component at 55 ~ 60 ℃. Garlic extract is preferably mixed 5 to 10 parts by weight with respect to 100 parts by weight of PET resin. If the content of the garlic extract is less than 5 parts by weight, the raw materials may not be properly entangled and the surface may not be formed evenly during plastic sheet production.If the content of the garlic extract is more than 10 parts by weight, the dispersibility and mixing properties of each component are rather There is a risk of deterioration.

In one embodiment, the apatite powder may be further mixed. The apatite powder functions as a filler and can maintain the shape of the plastic sheet to improve workability, maintain strength, and improve corrosion resistance. Apatite is an inorganic substance present in bone, and in order to use it as a filler, it is important to have a small particle size, high residual amount of carbonic acid, and low crystallinity. Preferably the size of the apatite granules is 200-400 μm. For this purpose, it is important to go through the sintering process at 500 ~ 700 ℃. When sintering at less than 500 ℃, there is a disadvantage that the size and crystallinity of the desired granules can not be obtained, when sintering above 700 ℃ has a disadvantage that the residual amount of carbonic acid groups is low, the crystallinity is too high. The apatite powder is preferably mixed at 20 to 30 parts by weight with respect to 100 parts by weight of the PET resin. If the content of the apatite powder is less than 20 parts by weight, there is a disadvantage that the adhesive strength is lowered, and if it exceeds 30 parts by weight, the impact resistance is weakened.

In one embodiment, the cork powder may be further mixed. Cork powder, together with the apatite powder, can improve the durability of the plastic sheet. Cork powder can be prepared by removing the bark of the oyster oak, and then grinding. As cork powder, it is preferable to use finely ground particles filtered into a mesh of 400 mesh or more for mixing with PET resin and the like. Cork powder is preferably mixed in 15 to 25 parts by weight based on 100 parts by weight of PET resin. If the cork powder is less than 15 parts by weight, the degree of improvement of durability is insignificant, and if it exceeds 25 parts by weight, voids may be formed inside the plastic during manufacture, so durability may be rather deteriorated.

In one embodiment, the hermit extract may be further mixed. The hermit extract not only acts as an antimicrobial agent, but also suppresses yellowing that may occur in white plastic sheets. Rumex crispus is a plant in the genus Rumex that grows in Korea. The hermit is a perennial herb that grows well in humid places around the country and uses young shoots for edible in the private sector. In Chinese medicine, yangje (양) is called cystitis, gallbladder disease, bile secretion disorders, spleen disease, skin disease, lymph node diseases and others It is used as an adjuvant therapy for tumors and cancer. The hermit extract extracted from the hermit has antimicrobial and antioxidant effects against various microorganisms, and when used in combination with a small amount of sulfur, it has an excellent effect on skin itching. It is reported that useful components of the oxalic acid include saponins, tannins, flavonoids, essential oils and anthraquinone derivatives such as chrysophanol and emodin. The hermit extract is washed well with the collected hermit, dried in the shade and broken up into ground parts (except roots) and underground parts (root parts), and extracted with 80% (v / v) methanol for 3 days. After immersion, the extract can be filtered with a membrane filter (porosity 0.5 μm) to separate the solids, and the methanol extract can be prepared by concentrating at 50 ° C. using a rotary evaporator. The hermit extract is preferably mixed at 3 to 8 parts by weight based on 100 parts by weight of the PET resin. When the content of the hermit extract is less than 3 parts by weight, the antimicrobial activity is insignificant in the anti-yellowing effect, when it exceeds 8 parts by weight is uneconomical.

The second step (S120) is a step of preheating the mixed composition, by applying heat to the mixed raw materials to ensure that the raw materials are stably mixed first.

The third step (S130) is a dehumidification step of removing moisture present in the preheated mixed composition, dehumidification is preferably made in a temperature range of 150 ~ 180 ℃. If it is below or exceeding the above range, dehumidification is insufficient or may adversely affect the durability of the plastic.

The fourth step (S140) is a step of heating the mixed composition from which moisture is removed, and after melting the mixed composition, the heating temperature is preferably controlled to 260 to 270 ° C.

The fifth step (S150) is a step of removing foreign matters from the heated mixed composition, and may remove foreign matters inside the mixed composition by passing a screen having a mesh shape.

The sixth step (S160) is a step of producing a plastic sheet by stretching while cooling the mixed composition from which foreign matters are removed, and stretching in two stages using a cooling roll. The primary stretching is made in the longitudinal direction through the cooling roll maintained at 16 ~ 17 ℃, the secondary stretching is made in the width direction (vertical direction in the longitudinal direction) through the cooling roll maintained at 20 ~ 23 ℃. The reason for raising the temperature of the secondary stretching above the primary stretching temperature is to prevent the plastic sheet to be solidified and to deteriorate in formability, and to improve the durability and formability of the plastic sheet by alternately stretching the longitudinal direction and the width direction. You can.

In the seventh step S170, after the silicone is coated on the plastic sheet, the silicone sheet may be dried, and the silicon may be coated to finish the treatment, and at the same time, an antistatic effect may be obtained. It is preferable to apply | coat silicone using the coating liquid diluted to the concentration range of 5-25%, and apply | coat silicone, and it is preferable to dry at 160-215 degreeC. In addition, it is preferable to mix the above-mentioned anti-fogging agent component with the coating liquid containing silicone in order to suppress the water phenomenon formed in the manufactured plastic container.

Hereinafter, the configuration of the present invention and its effects through specific examples and comparative examples will be described in more detail. However, this embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.

[Examples and Comparative Examples]

To prepare a mixed composition according to the composition of Table 1, after the preheating, dehumidification, heating, removing foreign matters, cooling and stretching, drying step to prepare a plastic sheet to prepare an example and a comparative example. Each material used commercially available material, and for the garlic extract and the hermit extract were prepared as described in the detailed description of the invention.

TABLE 1

Experimental Example 1

The compositions of Examples 1 to 3 and Comparative Examples were secondly stretched to prepare a 10 mm thick plastic sheet, and the uniformity of the sheet surface was measured and described in Table 2 below. At this time, the primary stretching was 16 ° C, and the secondary stretching was 21 ° C. Uniformity was measured using a laser sensor (N2 laser, oscillation wavelength 337.1nm, UDHO Laser. LTD., Japan), and 30 surface points were randomly selected to measure their surface roughness (standard deviation was used. , ± 0.3 or less were uniform, and more than ± 0.3 was evaluated as nonuniform. At this time, Examples 1-3 were extended in the width direction after extending | stretching in the longitudinal direction, and the comparative example extended | stretched only in the longitudinal direction.

TABLE 2

As in Table 2, in the case of Examples 1 to 3, both uniformity was superior to the comparative example.

Experimental Example 2: Torsion Test

The compositions of Examples 1 to 3 and Comparative Examples were secondly stretched to prepare a plastic sheet having a thickness of 2 mm, and then molded to prepare 100 plastic products, evaluated for completeness, and are shown in Table 3 below. At this time, Examples 1-3 were extended in the width direction after extending | stretching in the longitudinal direction, and the comparative example extended | stretched only in the longitudinal direction.

TABLE 3

As shown in Table 3, in Examples 1 to 3, more than 90% of the normal product can be made, but the comparative example has a relatively high defective rate.

Experimental Example 3: Yellowing Test

The compositions of Examples 1 and 3 were secondly stretched to prepare plastic sheets having a thickness of 2 mm, and then molded to prepare 100 white plastic products, which were visually observed for discoloration after 10 months, and are shown in Table 4 below. It was. At this time, the part which turned yellow was evaluated as defect.

TABLE 4

As shown in Table 4, in the case of Example 3, it was confirmed that almost all products did not discolor. On the other hand, Example 1 obtained good results, but the discoloration rate was relatively higher than that of Example 3.

Experimental Example 4: Antifog Test

After stretching the composition of Comparative Example and Example 3 to prepare a plastic sheet having a thickness of 2mm, and then molded by molding 100 white plastic products, after storing the spinach inside, after 1 day visually observed the inside It is shown in Table 5 below.

TABLE 5

As in Table 5, in the case of Example 3, almost no water droplets were formed, the comparative example was confirmed that the water droplets are enough to be identified with the naked eye.

The support bar 560 made of the above-described plastic sheet of the quality can be improved in durability and excellent moldability than when manufactured by using the PET resin alone.

Accordingly, when the support bar 560 is worn or damaged due to continuous vibration, it is possible to easily rebuild and replace using the above-described plastic sheet to ensure continuous use of the device.

Referring to FIG. 19, the load dispersing part 600 is installed below the support part 630 supporting the lower side of the elastic support part 500 and has a hollow part 615 therein, and a ball housing 610 and a hollow part. Ground ball having a plurality of support small balls 620 placed in the portion 615, and a fixing bolt 646 extending in an upward direction from the center of the ground plane 645 and the ground plane 645 on the top ( 640).

The load spreading part 600 may disperse and partially absorb the load applied from the outside, and transmit a load q smaller than the load P applied from the outside.

The load distribution unit 600 distributes the load applied from the outside of the ball housing 610 inside the ball housing 610 and finally transmits a load smaller than the load applied from the outside of the ball housing 610. . The load applied from the outside of the ball housing 610 is distributed by the plurality of supporting small balls 620 and the ground ball 640 located in the hollow part 615, and a part of the load is distributed to the ball housing 610. The inner wall may be dispersed while pressing, and the remaining load may be transmitted to the outside of the ball housing 610.

The ball housing 610 may be fixed to the surface by using concrete, etc., and a hollow portion 615 in which a plurality of supporting small balls 620 and ground balls 640 are accommodated may be provided therein. .

The ball housing 610 is a material having a certain strength of iron, concrete, wood, plastic, etc. to support the load distributed by the action between the plurality of supporting small balls 620 and the ground ball 640 disposed therein It may be made of.

The ball housing 610 may be formed in various shapes such as a polyhedron or a sphere, and the hollow part 615 may be formed in a spherical shape corresponding to the shape of the ground ball 640.

The plurality of supporting small balls 620 and the ground ball 640 may be accommodated in the hollow part 615 and may be formed in a spherical shape.

The plurality of supporting small balls 620 may be regularly arranged and received to be in contact with each other along the outer circumferential surface of the hollow part 615. The ground ball 640 may be accommodated in the hollow part 615 in a state in which the ground ball 640 is placed on the plurality of small balls for support 620, and may be supported in a point contact state with the plurality of small balls for support 620.

As described above, the plurality of supporting small balls 620 and the ground ball 640 are regularly arranged so that the outer circumferences are in contact with each other, and the external load is caused by the contact points between the plurality of the supporting small balls 620 and the ground balls 640. Dispersion of the external load may occur while pressing the inner wall of the hollow portion 615, ie, the ball housing 610, which is transmitted and finally located at the outermost side. At this time, in the present embodiment, the plurality of small balls for support 620 are regularly arranged, and the ground balls 640 are arranged on the plurality of small balls for support 620, thereby arranging the plurality of small balls for support. The number of contact points between the 620 and the ground ball 640 may be increased, and load transfer may be regulated to increase the load transfer effect between each other. In addition, the ground ball 640 is supported in a point contact state by the plurality of supporting small balls 620, it is possible to minimize the wear.

The plurality of supporting small balls 620 and the ground ball 640 may be made of a material having strength to withstand the load due to the contact point with each other, for example, may be made of iron, concrete, wood, plastic, etc. have.

On the other hand, the ground ball 640 may be provided with a ground plane 645 on the top. A fixing bolt 646 is installed at the center portion of the ground plane 645 to be inserted into the lower side of the support portion 630 so that the support portion 630 is fixed to the ground ball 640.

At this time, the fixing bolt 646 may be formed in a flat pattern without forming a separate protrusion on the outside, but by forming a thread along the outer surface (that is, a shape such as a piece of nail), the lower side of the support portion 630 It would be desirable to tighten more strongly.

As such, the load distribution unit 600 is installed below the elastic support part 500 to support the elastic support part 500, thereby ensuring the support stability of the upper frame 320 by the elastic support part 500 as described above. can do.

The above-described embodiments are for illustrative purposes, and those of ordinary skill in the art to which the above-described embodiments belong may easily change to other specific forms without changing the technical spirit or essential features of the above-described embodiments. I can understand. Therefore, it is to be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected by the present specification is represented by the following claims rather than the above description, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and their equivalents. .

1: mold 2: workpiece 10: press forming apparatus
20,30, 40: Movable lifting device with hydraulic jack
100: press main body 200: pressurized press
210: pressurization unit 220: pressurization cylinder
230: fastening portion 231: guide groove
232: sliding box 233: jig
2331: fastening jig 2332: rotating jig
234: fastening bolt

Claims (2)

A press main body portion which is formed to have an empty " And
It includes a pressurized press portion which moves in an up and down direction in the inner space of the press body portion, and presses the workpiece placed in the lower space of the press body portion with a mold fastened to the lower side,
The pressurizing press unit may include a pressurizing unit which moves downward from the inner space of the press main body and presses the workpiece with a mold fastened to the lower side to form the press; A pressurizing cylinder installed at an upper side of the inner space of the press main body and configured to move the pressurizing unit disposed at a lower side in an up and down direction in an inner space of the press main body; And a fastening part installed at a lower end of the pressing part to fasten a mold for pressing and pressing a workpiece.
The fastening part may include a plurality of guide grooves spaced apart from each other at predetermined intervals in a horizontal direction along a lower side of the pressing part; It is formed of a bolt head and a bolt screw extending downward from the bolt head and forming a thread along the outer surface, the bolt head is inserted into one of the plurality of guide grooves corresponding to the shape of the mold to be fastened A sliding bolt that is moved; A jig through which the bolt screw exposed to the lower side of the guide groove penetrates and is inserted in a vertical direction and fastens a mold disposed below the pressing unit; And a fastening bolt for fastening the bolt screw from the lower side to fix the jig to the mold when the jig fastens the mold.
The guide groove may have an upper space in which the bolt head slides to be wider than the diameter of the bolt head to prevent the sliding bolt from being separated, and a lower outlet through which the bolt screw exits may be the diameter of the bolt head. Narrower,
The jig, the pressing jig for pressing the lower one side of the mold to one side, the other side is supported on the lower side of the pressing portion to fasten the mold on the lower side of the pressing portion; And a rotational jig installed to be rotatable in the inner space of the fastening jig, the rotational screw forming a through hole for penetrating and inserting the bolt screw in a vertical direction.
The rotating jig, the pipe-shaped screw insertion tube to form a through hole in the vertical direction; A first fastening protrusion formed in a disc shape upright in a vertical direction and formed on an upper side of the screw insertion tube; And a second fastening protrusion formed in a disc shape upright in a vertical direction and formed on the other side of the upper part of the screw insertion tube.
The fastening jig may include: a jig body formed in a horizontal direction and fastening a mold; A rotation hole which penetrates the jig body in the vertical direction and is formed to form a space in which the screw insertion tube is installed to rotate; A first fastening groove formed in a horizontally horizontal direction in a form corresponding to the shape of the first fastening protrusion on one side of the upper part of the rotation hole to insert and fasten the first fastening protrusion; And a second fastening groove formed in a shape corresponding to the shape of the second fastening protrusion on the other side of the upper part of the pivoting hole in a horizontal direction to insert the second fastening protrusion into the second fastening groove.
A lower frame provided with a moving means on a lower surface, and at least one column having a variable length on the upper surface; An upper frame supported by the at least one pillar and disposed in parallel with the lower frame; And a hydraulic jack installed between the lower frame and the upper frame and lifting the upper frame by using an external force provided by a user to lift an object seated on the upper frame. Further comprising a movable lifting device equipped with a hydraulic jack for moving after seating on the upper side,
The hydraulic jack may include a main body in which a working fluid is stored and an inner cylinder and a lifting piston are disposed; Is installed on the outside of the main body is in communication with the main body to maintain a closed state, there is a pressure piston is formed therein, the working fluid is sucked as the pressure piston is raised and the suction sucked as the pressure piston is lowered An outer cylinder providing a working fluid to the inner cylinder; A pressure lever connected to a pressure piston disposed inside the outer cylinder to transfer an external force provided from a user to the pressure piston; And a release valve for releasing the pressure of the inner cylinder according to a user's operation to recover the working fluid introduced into the inner cylinder to the main body.
The outer cylinder may be provided in plural, and the plurality of outer cylinders may include a first outer cylinder formed along a central axis coaxial with the pressure lever and at least one second outer cylinder disposed along a diameter circumference of the first outer cylinder. Wherein the sum of the diameters of the first outer cylinder and the at least one second outer cylinder is one third or less of the diameter of the inner cylinder,
The first outer cylinder and at least one second outer cylinder is connected to the main body through an inlet pipe for introducing the working fluid stored in the main body into the inside,
The hydraulic jack further includes control means for selectively opening and closing a plurality of inlet pipes formed in each of the first outer cylinder and the at least one second outer cylinder to vary the lifting force of the pressure piston.
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