KR101972826B1 - Rotation jig - Google Patents

Abstract

Disclosed is a rotary jig including: a rotary member housing including an insertion part for inserting and rotating a workpiece; and a push member housing placed at a predetermined distance from the rotary member housing. According to the present invention, the rotary jig is capable of increasing productivity by making processing work continuous.

Description

Rotation Jig {ROTATION JIG}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary jig, and more particularly, to a rotary jig configured on a table of a tapping device to enable rotation of a workpiece.

In general, moldings produced by casting, extrusion and the like in industrial fields are processed into finished articles of high precision through cutting according to the use.

The cutting process can be divided into turning, drilling, boring, milling, and grinding. Particularly, a drilling process for drilling holes, a boring process for drilling open holes, a milling process for cutting a metal by transferring a workpiece to a rotating tool, tool.

In the case of a processing apparatus using such a tool, a jig for fixing the workpiece on the work table is provided. The jig for the processing apparatus is fixed on the work table so that the workpiece corresponds to the vertically lower portion of the processing tool and the processing tool enters the processing portion and firmly fixes the workpiece during the cutting process.

However, when the machining portion of the workpiece is located on several surfaces or the machining angle is not vertical, the workpiece must be separated from the jig in order to correspond the machining portion to the machining tool, , There is a problem in that such a direction switching work is troublesome and the productivity is deteriorated with an increase in the total working time.

The present invention can firmly fix a workpiece while the workpiece is being machined, adjust the angle between the machining tool of the machining apparatus and the machined surface of the workpiece, and match the machined surface of the workpiece with the machining tool The workpiece being rotated so that the workpiece can be rotated.

The rotary jig for solving the above-mentioned problems includes a rotary member housing formed with an insertion portion for inserting and rotating a workpiece, and a push member housing spaced apart from the rotary member housing.

The rotary member housing is fixed to the work table of the tapping device. A plurality of insertion portions for inserting a plurality of workpieces are formed on a surface of the rotary member housing opposite to the push member housing. A plurality of insertion portions are formed on one side thereof with workpiece insertion grooves corresponding to the shape of the workpiece, and the workpiece insertion grooves are formed by the workpiece insertion grooves A workpiece is inserted, a pinion gear penetrating through one side of the rotary member housing and extending to the inside thereof, and a pinion gear meshing with the rack gear is formed on the other side, And the push member housing is formed so as to face the plurality of insertion portions, And the other side of the push member housing is provided with a plurality of projecting portions which are provided with driving means so as to be able to move to the rotary member housing side through one side of the push member housing Wherein the plurality of push portions move from the one side of the push member housing to the rotary member housing side when the work is inserted into the plurality of insertion portions and the rotation is completed, And a connecting housing for pushing and holding the processed workpiece and connecting the rotating member housing and the push member housing.

According to the present invention, not only can the workpiece be gripped and fixed, but also the workpiece can be rotated so that the machined surface of the workpiece is formed over a plurality of surfaces, so that the machined surface of the workpiece can be easily So that the machining operation can be continuously performed, thereby improving the productivity.

1 is a view showing a part of a rotary jig according to an embodiment of the present invention.
FIG. 2 is a view showing the internal structure of the rotary member housing shown in FIG. 1. FIG.
FIG. 3 is a view showing the internal structure of the push member housing shown in FIG. 1. FIG.
4 is a view showing a vibration damping unit.
FIG. 5 is a view showing the first plate of FIG. 4. FIG.
6 is a view showing a load distribution section.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, 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 features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

The rotary jig of the present invention is formed on a table of a machining apparatus and fixes the workpiece firmly while the workpiece is being machined by the machining device and adjusts the angle between the machining tool of the machining device and the machined surface of the workpiece Or the workpiece can be rotated so that the unprocessed surface of the workpiece can be matched to the machining tool.

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

1 is a view showing a rotary jig according to an embodiment of the present invention.

In the present embodiment, the machining apparatus is a tapping apparatus including a tapping tool for tapping, and the workpiece has a rectangular parallelepiped shape.

Referring to FIG. 1, a rotary jig 1000 according to an embodiment of the present invention may be configured on a work table (not shown) of a tapping device 1 to grasp and fix a workpiece 5, So that the tapping device 1 can be easily tapped.

For example, in the case of a processing step in which a hole is formed vertically from the processing surface of the workpiece 5, the rotary jig 1000 according to the embodiment of the present invention is configured such that the processing surface of the workpiece 5 As shown in FIG.

The rotary jig 1000 according to the embodiment of the present invention rotates the workpiece 5 to rotate the workpiece 5 so that the machining surface of the workpiece 5 is inclined, And the angle between the tapping device 1 and the tapping device 1 can be adjusted.

The rotary jig 1000 according to an embodiment of the present invention includes a rotary member accommodated in a rotary member housing 11 to insert and rotate a workpiece 5, And a connecting housing 20 for connecting the rotary member housing 11 and the push member housing 31. The push member housing 31 includes a push member for pushing and holding the work piece 5 inserted into the rotary member, . ≪ / RTI >

The rotary member housing 11 and the push member housing 31 can be fixedly installed on both sides of the work table of the tapping device 1 at regular intervals from each other. The rotary member housing 11 and the push member housing 31 can be configured to be spaced a distance sufficiently longer than the length of the workpiece 5 because the workpiece 5 is disposed therebetween.

A plurality of inserting portions 15 may be formed on one side of the rotatable member housing 11, specifically, on a surface facing the push member housing 31. [

A plurality of insertion portions 15 are structured such that a workpiece 5 is inserted. For this purpose, a workpiece insertion groove 15a corresponding to the shape of the workpiece 5 may be formed. At least a part of the workpiece 5 may be fitted and fixed to the workpiece insertion groove 15a.

The plurality of insertion portions 15 may be arranged side by side along the longitudinal direction of the rotary member housing 11.

The plurality of insertion portions 15 may extend through one side of the rotary member housing 11 and extend into the interior thereof. That is, one side of the plurality of inserting portions 15 is formed with a workpiece insertion groove 15a, and the workpiece 5 can be inserted by projecting from one side of the housing 11 of the rotary member. The other side of the plurality of insertion portions 15 is formed with a pinion gear, and can be engaged with the rack gear and rotated. The workpiece 5 inserted into the plurality of insertion portions 15 is rotatable. A detailed description thereof will be given later with reference to Fig.

A plurality of push portions may be formed on one side of the push member housing 31, specifically, on a surface facing the rotary member housing 11. The plurality of pushing portions are configured to push and hold the workpiece 5 inserted into the plurality of insertion portions 15. For this purpose, the plurality of pushing portions may be positioned to face the plurality of insertion portions 15, respectively. The workpiece 5 may be firmly fixed by being pushed by the push portion to the other side in a state where one side is inserted into the insertion portion 15. [ A detailed description thereof will be given later with reference to Fig.

FIG. 2 is a view showing the internal structure of the rotary member housing shown in FIG. 1. FIG.

2, the rotating member may include a pinion gear 16 formed in the insertion portion 15 and a rack gear 18 engaged with the pinion gear 16. At least a part of such a rotating member can be received in the rotating member housing 11 and can be configured to rotate the workpiece 5. [

The pinion gear 16 may be formed on the other side of the insertion portion 15. The work piece 5 can be inserted into one side of the insertion portion 15 as described above.

The rack gear 18 is formed along the longitudinal direction of the rotary member housing 11 and can be engaged with the pinion gear 16. The rack gear 18 may be formed to be movable along the longitudinal direction of the rotary member housing 11. For example, the rack gear 18 can be reciprocally moved as shown by the arrows in Fig. 2, with one side connected to the forward and backward cylinders.

When the rack gear 18 linearly moves along the longitudinal direction of the rotary member housing 11, the insertion portion 15 formed with the pinion gear 16 engaged with the rack gear 18 can be rotated. That is, the insertion portion 15 can be rotated by the rack gear 18 and the pinion gear 16, and the workpiece 5 inserted into the insertion portion 15 can also be rotated.

Here, the rotational angle of the pinion gear 16 can be adjusted by adjusting the amount of linear motion of the rack gear 18, so that the machining surface of the workpiece 5 to be inserted into the insertion portion 15 can be set.

FIG. 3 is a view showing the internal structure of the push member housing shown in FIG. 1. FIG.

Referring to Fig. 3, the push member may include a plurality of push portions 35. Fig. At least a portion of such a push member can be received in the push member housing 31 and can be configured to push the workpiece 5 inserted into the insert 15.

The plurality of push portions 35 push the work piece 5 inserted into the insertion portion 15 and may be formed to face the plurality of insertion portions 15 for this purpose. That is, the plurality of push portions 35 can be arranged side by side along the longitudinal direction of the push member housing 31 like the plurality of insertion portions 15.

The plurality of push portions 35 may extend through one side of the push member housing 31 and extend into the push member portion. The plurality of push portions 35 may be formed so as to be linearly movable between the push member housing 31 and the rotary member housing 11. [

 That is, one side of the plurality of push portions 35 may be arranged to protrude from one side of the push member housing 31 in a configuration in contact with the work 5. The other side of the plurality of push portions 35 is provided with a driving means such as a motor so that a plurality of push portions 35 can be moved through the push member housing 31 to be movable.

The push portion 35 is inserted into the rotation member housing 11 from the one side of the push member housing 31 when the work piece 5 is inserted into the insertion portion 15 and the rotation by the insertion portion 15 is completed. So that the workpiece 5 can be pushed and held.

As described above, the rotary jig 1000 according to the embodiment of the present invention not only grasps and fixes the workpiece 5 but also rotates the workpiece 5, The processing surface of the workpiece 5 can be easily switched without the necessity of separating the workpiece 5 from the jig, so that the machining operation can be continuously performed, and productivity can be improved.

Although not shown in FIG. 1, the rotary jig 1000 according to an embodiment of the present invention may further include a vibration damping unit. The vibration damping portion is provided at a portion where the rotary member housing 11, the push member housing 31 and the connection housing 20 are connected to each other so that the rotary member housing 11, the push member housing 31 and the connection housing 20 ) Of the vibrating plate. In the present invention, it is possible to solve the problems including the vibration damping part and the damage or detachment of the respective structures by vibration.

4 is a view showing a vibration damping unit.

4, the vibration damping portion 330 includes a support portion 331, a vibration absorbing portion 332, a connection plate 333, an extension plate 334, and an installation portion 335. [

The support portion 331 includes a first plate 331-1, a second plate 331-2, a third plate 331-3, and a fourth plate 331-4 ).

At this time, the first plate 331-1, the second plate 331-2, the third plate 331-3, and the fourth plate 331-4 are spaced apart from each other such that their rear ends are opposed to each other, And the vibration absorbing portion 332 is installed in the spaced space to absorb the vibration transmitted to each plate.

The vibration absorbing portion 332 is provided between each plate of the support portion 331 and the other plate to absorb vibration.

In one embodiment, the vibration absorbing portion 332 may be formed by means of an elastic material such as a spring or rubber, which absorbs the impact. However, if the material absorbs the impact, Will be possible.

The connecting plate 333 is disposed between the upper portion of the first plate 331-1 and the upper portion of the second plate 331-2 and between the front end of the second plate 331-2 and the upper end of the third plate 331-3 Between the front ends, between the lower part of the third plate 331-3 and the lower part of the fourth plate 331-4 and between the front end of the fourth plate 331-4 and the front end of the first plate 331-1 The first plate 331-1, the second plate 331-2, the third plate 331-3, and the fourth plate 331-4 in a " + " shape Connect.

In other words, the connection plate 333 can form an overall appearance by interconnecting the upper, lower, or front ends of the respective plates, as well as, by rotating each connection portion, By adjusting the angle of connection, vibration or shock can be absorbed more efficiently.

That is, when the first plate 331-1, the second plate 331-2, the third plate 331-3, and the fourth plate 331-4 are fixed to each other by the connection plate 333 If a critical vibration or a critical impact is applied, the coupling plate 333, which is connected to each plate, can not sustain the vibration or the critical impact, so that the original function can not be performed .

Accordingly, the connecting plate 333 according to the present invention includes the first plate 331-1, the second plate 331-2, the third plate 331-3, and the fourth plate 331-4 By connecting to a certain degree of movement, it is possible to maintain the engagement more efficiently in vibration or impact than in the case described above.

The extension plate 334 includes an upper portion (i.e., an upper blade) and a front end (i.e., a front end blade) of the first plate 331-1, an upper portion and a front end of the second plate 331-2, -3), and the mounting portion 335 for each plate in the upper or lower direction from the lower end and the front end of the fourth plate 331-4.

In one embodiment, the extension plate 334 can be pivoted by connecting the upper or lower portion to the pivot shaft formed at the lower portion of the mounting portion 335. [

The mounting portion 335 is connected to the upper portion or the lower portion of the two extension plates 334 extended from each plate so as to be opposed to and rotatable with respect to each other and the rotary member housing 11, (E.g., using fastening means such as screw bolts, welding, or rivets) to the housing 20.

Figure 5 is a view showing the first plate of Figure 4;

5, the first plate 331-1 includes a plate body 331-11, two first upper engagement grooves 331-12, a second upper engagement groove 331-13, two And includes first and second shear locking grooves 331-14 and 331-15.

The plate main body 331-11 is formed of a plate of an " a " shape, and two first upper fastening grooves 331-12 and a second upper fastening groove 331-13 are formed on the upper blade, Two first shear locking grooves 331-14 and a second shear locking groove 331-15 are formed on the wing.

The first upper engagement groove 331-12 is formed on the upper blade of the plate body 331-11 formed in the upward direction and is connected to the front end of the connection plate 333 so as to be rotatable.

The second upper engagement groove 331-13 is formed between the first upper engagement grooves 331-12 so that the lower portion of the extension plate 334 is rotatably connected.

The first shear engagement grooves 331-14 are formed on the front end of the plate body 331-11 formed in the front end direction and are connected to each other so that the upper portion of the connection plate 333 is rotatable.

The second shear engagement grooves 331-15 are formed between the first shear engagement grooves 331-14 and are connected so that the lower portion of the extension plate 334 can rotate.

In one embodiment, the extension plate 334 is provided with a second upper engagement groove 331, 332 so as to be slidable in the vertical direction in the second upper engagement groove 331-13 or the second shear engagement groove 331-15. And a vertical sliding groove 341 can be formed at a lower portion connected to the second front end locking groove 331-15 or the second front end locking groove 331-15.

The connection plate 333 may also have a sliding groove having the same structure as the sliding groove 341 of the extension plate 334 described above.

The first plate 331-1 having the above-described structure is attached to the second plate 331-2, the third plate 331-3, or the fourth plate 331-4 The description of the second plate 331-2, the third plate 331-3 or the fourth plate 331-4 will be omitted.

Also, although not shown in FIG. 1, the rotary jig 1000 of the present invention may further include a load distribution unit. The load distributing portion is provided at a portion where the rotary member housing 11 or the push member housing 31 and the work table of the tapping device 1 are connected to each other so that the rotary member housing 11 or the pushing member housing 31, The load applied to the work table of the machine 1 can be dispersed and partially absorbed.

6 is a view showing a load distribution section.

6, the load dispersing unit 700 includes a ball housing 710 having a hollow portion 715 therein, a plurality of small balls 720 for support placed in the hollow portion 715, And a ground ball 740 having a plane 745.

The load distribution unit 700 may be installed at a portion of the rotary member housing 11 or the push member housing 31 and the work table of the tapping device 1,

The load distributor 700 disperses and partially absorbs the load applied from the outside, and can transmit a load q smaller than the load P externally applied.

The load dispersing unit 700 disperses the load applied from the outside of the ball housing 710 inside the ball housing 710 and finally transmits the load smaller than the load externally applied to the ball housing 710 . The load applied from the outside of the ball housing 710 is dispersed by the plurality of small balls 720 for support and the ground ball 740 located in the hollow portion 715. A part of the load is applied to the ball housing 710 And the remaining load can be transmitted to the outside of the ball housing 710. [

The ball housing 710 can be fixed to the rotary member housing 11 or the push member housing 31 and includes a hollow portion 715 in which a plurality of small balls for support 720 and a ground ball 740 are accommodated May be provided.

The ball housing 710 is made of steel, concrete, wood, plastic, or the like having a certain strength to support a load dispersed by a plurality of small balls 720 for support and a ground ball 740 ≪ / RTI >

The shape of the ball housing 710 may be various shapes such as a polygonal shape and a spherical shape. However, the hollow portion 715 may be formed in a spherical shape corresponding to the shape of the ground ball 740.

The plurality of small balls for supporting 720 and the ground ball 740 may be accommodated in the hollow portion 715 and may be formed in a spherical shape.

The plurality of small balls 720 for support can be regularly arranged and received so as to be in contact with each other along the outer circumferential surface of the hollow portion 715. The ground ball 740 may be received in the hollow portion 715 in a state of being put on a plurality of small balls for support 720 and may be held in point contact with the plurality of small balls for support 720.

The plurality of small balls for support 720 and the ground balls 740 are regularly arranged so that the outer circumferences thereof are in contact with each other. By the contact points between the plurality of small balls for support 720 and the ground balls 740, The external load can be dispersed while pressing the hollow portion 715, i.e., the inner wall of the ball housing 710, finally disposed at the outermost position. At this time, in this embodiment, the plurality of small balls for support 720 are regularly arranged and the ground balls 740 are arranged on the plurality of small balls for support 720, The number of contact points between the ball 720 and the ground ball 740 can be increased and the load transmission can be regularized to enhance the load transfer effect between the balls. In addition, since the ground ball 740 is supported in a point contact state by a plurality of small balls 720 for support, wear can be minimized.

The plurality of small balls for support 720 and the ground ball 740 may be made of a material having strength capable of withstanding a load due to a contact point between the small balls 720 and the ground ball 740 and may be made of iron, have.

Meanwhile, the ground ball 740 may have a ground plane 745 on the top. The ground plane 745 may be attached to the rotary member housing 11 or the push member housing 31 and the portion to which the working table of the tapping device 1 is connected. 6, the load dispersing unit 700 further includes a fixed lid for fixing the ground ball 740 received in the hollow portion 715, and the rotary lid member 11 or the push member housing 740 is fixed by the fixed lid, (31) and the work table of the tapping device (1).

As such, the load distributing portion 700 can distribute the load applied to the work table of the tapping device 1 from the rotary member housing 11 or the push member housing 31, absorb some of the load, and transfer the load to the work table. Accordingly, the load distribution unit 700 can ensure the safety of the support of the work platform, and can prevent problems such as deformation of various structures due to high load.

At least a part of the structure of the rotary jig 1000 according to an embodiment of the present invention may be realized by a plastic sheet manufactured by the method of manufacturing a plastic sheet according to an embodiment of the present invention as follows.

A method of manufacturing a plastic sheet according to an embodiment of the present invention includes the steps of: 100 parts by weight of a polyethylene terephthalate (PET) resin; 2 to 4 parts by weight of a polyurethane dispersant; and polyethylene dioxythiophene 0.1 to 0.2 part by weight of polystyrene sulfonate, 3 to 5 parts by weight of polystyrolsulfonic acid, N-methyl-2-pyrrolidone, 0.1 to 0.1 part by weight of triethyl amine 0.1 ~ 0.3 part by weight, 42 ~ 45 parts by weight of isopropyl alcohol and 50 ~ 52 parts by weight of water to prepare a mixed composition; A second step of preheating the mixed composition; A third step of removing moisture from the preheated mixed composition; A fourth step of heating the moisture-removed mixed composition; A fifth step of removing foreign substances from the heated mixed composition; A sixth step of preparing a plastic sheet by stretching the mixed composition from which foreign matters have been removed; And a seventh step of applying silicone to the plastic sheet, followed by drying. The present invention can produce a plastic sheet excellent in moldability and durability by mixing various additives with conventional PET resin and preheating, dehumidifying, heating and cooling.

In the first step, as the mixing step of the raw materials, polyethylene terephthalate (PET) resin is used as a base resin, and a polyurethane dispersant, polyethylene dioxythiophene polystyrene sulfonate, Is a step of mixing poly (styrol sulfonic acid), N-methyl-2-pyrrolidone, triethyl amine, isopropyl alcohol and water.

The PET resin is a base resin, which has excellent thermal stability and high crystallinity, can be recycled, and is manufactured in a master batch form. The polyurethane dispersant functions to improve the compatibility with other components. Polyethylene dioxythiophene polystyrene sulfonate, polystyrolsulfonic acid, N-methyl-2-pyrrolidone, and triethyl amine. Function as an antistatic agent. Since the plastic sheet for producing the plastic container is generally an electrical insulator, static electricity is generated by friction charging, and if it is seriously damaged by discharge or electric conduction, it may lead to an accident such as explosion or fire, so it is preferable to add a charging agent . Isopropyl alcohol functions as an antifogging agent. The anti-fogging agent can inhibit the formation of water droplets due to the water vapor which may be generated when a plastic container is used to store a fruit or the like by using a plastic sheet.

For example, the above-mentioned raw materials may be used in an amount of 2 to 4 parts by weight of a polyurethane dispersant, 0.1 part by weight of polyethylene dioxythiophene polystyrene sulfonate (hereinafter referred to as " polyethylene dioxythiophene polystyrene sulfonate ") of 100 parts by weight of polyethylene terephthalate , 0.4 to 0.6 parts by weight of polystyrolsulfonic acid, 3 to 5 parts by weight of N-methyl-2-pyrrolidone, 3 to 5 parts by weight of triethylamine, 0.1 to 0.3 parts by weight, 42 to 45 parts by weight of isopropyl alcohol and 50 to 52 parts by weight of water. When added beyond the above-mentioned range, various problems may occur. Particularly, in the case of an antistatic agent, when mixed over the respective ranges, the plastic surface to be produced may be sticky, the sealing property and printability may be deteriorated, and in the case of white plastic, yellowing may occur.

In addition, the first step may further incorporate various additional ingredients into the raw materials to enhance the functionality of the plastic sheet.

As an example, a boron-based binder may be further mixed. The boron (B) type binder is used for bonding the respective components, and the boron type binder is preferably mixed in 2 to 10 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the boron-based binder is less than 2 parts by weight, the raw material or the like can not be effectively bonded, and when the content of the boron-based binder exceeds 70 parts by weight, it is uneconomical.

As an example, garlic extract may be further mixed. The garlic extract is a natural adhesive component, which together with the boron-based binder functions as a binder which improves the compatibility with other constituents. The garlic extract is peeled and crushed, and 2 to 3 parts by weight of water is added per 1 part by weight of garlic. After heating at 80 to 100 캜 for 5 hours or more, the liquid component is extracted and filtered, The liquid component can be prepared by concentrating at 55 to 60 占 폚. The garlic extract is preferably mixed in 5 to 10 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the garlic extract is less than 5 parts by weight, the raw material components may not be properly entangled so that the surface of the plastic sheet may not be uniformly formed. When the amount of the garlic extract is more than 10 parts by weight, There is a risk of degradation.

As an example, the apatite powder may be further mixed. The apatite powder functions as a filler and can maintain the shape of the plastic sheet, thereby improving workability and improving strength and corrosion resistance. Apatite is an inorganic substance present in bone. It is important to use a small amount of particles, a high residual amount of carbonate, and low crystallinity for use as a filler. Preferably, the size of the apatite granules is 200 to 400 탆. For this purpose, it is important to carry out the sintering process at 500 to 700 ° C. When sintering at less than 500 ° C, there is a disadvantage in that the desired granule size and crystallinity can not be obtained. When sintering exceeds 700 ° C, there is a disadvantage in that the remaining amount of carbonate is low and the crystallinity becomes too high. The apatite powder is preferably mixed in 20 to 30 parts by weight with respect to 100 parts by weight of the PET resin.

When the content of the apatite powder is less than 20 parts by weight, there is a disadvantage in that the adhesive strength is lowered, and when it exceeds 30 parts by weight, the impact resistance is weakened.

As an example, cork powder can be further mixed. Cork powder can improve the durability of the plastic sheet with apatite powder. The cork powder can be prepared by removing the shell of oak oak and then crushing it. For the cork powder to be mixed with the PET resin and the like, it is preferable to use fine pulverized particles which have been passed through a mesh of 400 mesh or more. The cork powder is preferably mixed in 15 to 25 parts by weight with respect to 100 parts by weight of the PET resin. When the cork powder is less than 15 parts by weight, improvement in durability is insignificant. When the cork powder is more than 25 parts by weight, porosity may be formed in the production of plastics, and durability may be lowered.

As an example, the Sorghum extract can be further blended. Sorghum extract not only acts as an antimicrobial agent but also inhibits the yellowing of white plastic sheets. Rumex crispus is a genus of Rumex spp. It is a perennial herb that grows well in moist places of various places. It uses the lysoon as a food in the private sector. In the oriental medicine, it is called a yosei, and it is categorized into various diseases including cystitis, gallbladder disease, bile secretion disorder, spleen disease, It is used as an adjuvant treatment for tumors and cancer. Sorghum extract extracted from Sora japonica has antimicrobial and antioxidant effects against various microorganisms. When mixed with a small amount of sulfur, it has an excellent effect on skin itching. It has been reported that saponins, tannins, flavonoids, essential oils and chrysophanol, and anthraquinone derivatives such as emodin, are known to be useful components of the present invention. The extracts of Sorae Seedlings were washed in 80% (v / v) methanol for 3 days as an extraction solvent by washing the collected Sorghum wells and then drying them in the shade and dividing them into the ground part (except the root) and the root part (root part) After soaking, the extract is filtered with a membrane filter (pore size 0.5 mu m) to separate the solid, and the methanol extract can be prepared by concentrating the extract at 50 DEG C using a rotary evaporator. It is preferable that the Sorghum extract is mixed in 3 to 8 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the extract is less than 3 parts by weight, the antimicrobial activity is insufficient in preventing yellowing, and when it is more than 8 parts by weight, it is uneconomical.

The second step is a step of preheating the mixed composition, and heat is applied to the mixed material so that the materials are stably mixed.

Preferably, the third step is a dehumidifying step of removing moisture present in the preheated mixed composition, and the desiccation is preferably performed in a temperature range of 150 to 180 ° C. If the amount is less than or more than the above range, the dehumidification may not be sufficiently performed, or the durability of the plastic may be adversely affected.

The fourth step is a step of heating the mixed composition from which the moisture has been removed, and the heating temperature is preferably controlled to 260 to 270 ° C in order to melt and maintain the mixed composition.

The fifth step is a step of removing the foreign substance of the heated mixed composition, and it is possible to remove the foreign matter in the inside of the mixed composition by passing it through a screen in the form of a mesh.

The sixth step is a step of cooling the mixed composition from which the foreign substances have been removed to prepare a plastic sheet, which is then drawn in two stages using a cooling roll. The primary stretching takes place in the longitudinal direction through a chill roll maintained at 16-17 캜 and the secondary stretching takes place in the width direction (vertical direction in the longitudinal direction) through a cooling roll maintained at 20-23 캜. The reason for raising the temperature of the secondary elongation to be higher than the primary elongation temperature is to prevent the plasticizability of the solidified plastic sheet from being dried and to improve the durability and moldability of the plastic sheet by alternately stretching the longitudinal direction and the width direction .

The seventh step is a step of applying the silicone to the plastic sheet and then drying it, and the antistatic effect can be obtained at the same time as the finishing treatment is performed by applying the silicone. It is preferable that silicone is applied using a diluted coating liquid in a concentration range of 5 to 25%, coated with silicone, and then dried at 160 to 215 캜. Further, it is preferable that the anti-fogging agent component is mixed with the silicone-containing coating liquid in order to suppress the water phenomenon formed in the produced plastic container.

Hereinafter, the structure and effects of the present invention will be described in more detail with reference to specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Examples and Comparative Examples]

After preparing a mixed composition according to the composition shown in the following Table 1, plastic sheets were prepared by preheating, dehumidifying, heating, removing foreign matter, cooling, stretching and drying to prepare Examples and Comparative Examples. For each material, commercially available materials were used, and garlic extract and Sorghum 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 secondarily drawn to prepare a plastic sheet having a thickness of 10 mm, and the uniformity of the sheet surface was measured and reported in Table 2 below.

At this time, the primary drawing was performed at 16 占 폚 and the secondary drawing was performed at 21 占 폚. The uniformity was measured using a laser sensor (N2 laser, oscillation wavelength 337.1 nm, UDHO Laser., Japan), and 30 points were randomly selected and their surface roughness was measured , A value equal to or less than 0.3 was considered to be uniform, and a value exceeding 0.3 was evaluated to be non-uniform. Here, Examples 1 to 3 were stretched in the transverse direction after stretching in the longitudinal direction, and stretched only in the longitudinal direction in the Comparative Example.

[Table 2]

As shown in Table 2, in Examples 1 to 3, uniformity was more excellent than Comparative Example.

[Experimental Example 2: Torsion Test]

The compositions of Examples 1 to 3 and Comparative Examples were secondarily stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to produce 100 plastic products, and the completeness of the plastic sheets was evaluated. Here, Examples 1 to 3 were stretched in the transverse direction after stretching in the longitudinal direction, and stretched only in the longitudinal direction in the Comparative Example.

[Table 3]

As shown in Table 3, in the case of Examples 1 to 3, 90% or more of the normal product could be made, but the comparative example had a relatively high defect rate.

[Experimental Example 3: yellowing test]

The compositions of Examples 1 and 3 were secondarily stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to prepare 100 white plastic products. Ten months later, discoloration was visually observed, . At this time, a part changed to yellow color was evaluated as poor.

[Table 4]

As shown in Table 4, in Example 3, it was confirmed that almost all the products were not discolored. On the other hand, Example 1 showed good results, but had a higher discoloration rate than Example 3.

[Experimental Example 4: Anti-Fogging Test]

The composition of Comparative Example and Example 3 was secondarily drawn to prepare a plastic sheet having a thickness of 2 mm and then molded to produce 100 white plastic products. The spinach was stored inside, and after one day, The results are shown in Table 5 below.

[Table 5]

As shown in Table 5, in the case of Example 3, almost no water droplets were formed, but in the comparative example, it was confirmed that water droplets enough to be visually recognized were formed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

1000: Rotating jig
1: tapping device
5: Workpiece
11: rotatable member housing
15:
15a: workpiece insertion groove
20: connection housing
31: push member housing

Claims (2)

A rotatable member housing having an insertion portion for inserting and rotating a workpiece;
A push member housing disposed at a predetermined distance from the rotary member housing;
A connecting housing for connecting the rotary member housing and the push member housing; And
And a vibration damping portion installed at a portion where the rotary member housing, the push member housing and the connection housing are connected to each other and absorb vibration generated between the rotary member housing, the push member housing and the connection housing,
Wherein the rotary member housing is fixed to a work table of a tapping device, and a plurality of insertion portions for inserting a plurality of workpieces are formed on a surface facing the push member housing, A rack gear which is engaged with the insertion portion and is provided so as to be linearly movable,
Wherein the plurality of inserting portions are formed with a workpiece insertion groove corresponding to the shape of the workpiece at one side thereof, a workpiece is inserted by the workpiece insertion groove, and extends through one side of the housing of the rotation member And a pinion gear meshing with the rack gear is formed on the other side of the rack gear. The workpiece inserted into the workpiece insertion groove is rotated according to the linear movement of the rack gear,
The push member housing is formed so as to face the plurality of insertion portions, one side of which is protruded from one side of the push member housing so as to be in contact with the work piece inserted into the plurality of insertion portions, A plurality of pushing portions provided with driving means so as to be able to move through the push member housing to the rotary member housing side,
Wherein the plurality of push portions move from one side of the push member housing to the side of the rotary member housing to push the work piece inserted into the plurality of insertion portions when the work is inserted into the plurality of insertion portions and the rotation is completed, However,
The vibration damping unit may include: a support unit including a first plate, a second plate, a third plate, and a fourth plate formed in an " a " A vibration absorbing part provided between the plate of the support part and the other plate to absorb vibration; Between the upper portion of the first plate and the upper portion of the second plate, between the front end of the second plate and the front end of the third plate, between the lower portion of the third plate and the lower portion of the fourth plate, A second plate, a third plate, and a fourth plate that are installed between the front end of the first plate and the front end of the first plate to connect the first plate, the second plate, the third plate, and the fourth plate; The upper and the front ends of the first plate, the upper and the front ends of the second plate, the front and lower ends of the third plate, and the upper and lower ends of the fourth plate, An extension plate; And an attachment portion that is connected and installed so that upper or lower portions of two extension plates extending from each plate are opposed to each other and pivotable.
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