KR20080064845A - Rotary support structure for mould sets - Google Patents

Abstract

The invention is a new rotary support structure for moulds, with circular or annular rotating plane (O2), on which various moulds are installed (S), said structure being equipped with a single mould opening mechanism (U 1a, U 1b) and a single mould closing mechanism (U2a, U2b). On the circular plane (02), at the level of each pair of mould halves (Sa, Sb), there are several locking devices (C) that slide radially and are formed by two elements (C1, C2) with opposing C-shaped sections constrained to each others. The upper half of the mould (Sa) is integral with one or more sliding rods (Bs) generically orthogonal to the circular or annular plane (O) and having the lower end provided with a sliding block (Bp) suited to slide on a rail (F5) positioned below the circular or annular plane (O).

Description

ROTARY SUPPORT STRUCTURE FOR MOULD SETS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for an EVA (Ethylene Vinyl Acetate) molded article, an associated mold, and a mold holder, and more particularly, to a rotation support apparatus having a fixing mechanism for quickly opening a mold.

Plastic materials such as EVA are widely used materials for articles that require flexibility and resistance, such as shoes. EVA, which is a solid state at room temperature, is plastically deformed at a temperature of 80 to 90 ° C., but when exposed to a temperature of 140 to 180 ° C. for a sufficient time, the EVA is expanded to form the mold while expanding through the molding process. Opening the mold is still hot and hot EVA continues to expand between the two half molds.

If the mold is not opened quickly, the swelling of the EVA, which occurs when the mold is opened, creates long marks on the shoes and changes the shape of the shoes, and these shoes are not available for sale.

Various operations are performed between closing the mold for the production of plastic products and opening the mold to take out the product. For example, two half molds are preheated, the material is injected, and the molding or expansion temperature of the plastic material is increased. The mold is heated and the mold is held at the molding temperature. For mass production, several molds are placed on rotating plates or linear structures. After the rotation of the turntable, all product production steps are carried out, the product is taken out and the production process of other products begins.

Therefore, the same mold can be used to open the mold to take out the product, clean the mold and then close the mold to produce a new product, which can be done with several molds. In the structure of several molds, there is one mechanism for injecting plastic materials into all molds and opening and closing each mold. In this case, not only the structure becomes complicated, but also the maintenance cost increases, and even there is a risk that only one mechanism breaks down and the whole apparatus is stopped.

Such molding machines are large and very expensive.

Moreover, when there are several opening / closing mechanisms, even if only one mechanism fails or malfunctions, there exists a possibility that the whole apparatus may be stopped for a long time.

In addition, to increase productivity, a mold that produces one or more products is used every cycle.

In order to install and transport the unit to the factory for use, the parts must be disassembled and installed in place and the space taken up must be quite large. In particular, the circular part for installing the mold and the opening and closing mechanism is too large to carry it in a general container.

The injector is generally arranged radially with respect to the circular plate, the size of which is the same as the diameter of the circular plate, but longer. Currently, mold holders holding two half molds are mostly supported by hinged or movable arms, which require complex and expensive hydraulic equipment to open and close them.

In order to overcome the above drawbacks, a new rotary support for the mold set is constructed, which allows the mold to be quickly opened as well as to engage the mold with an associated locking mechanism.

The main purpose of the present invention is to open a mold with one mechanism.

Another object of the present invention is to open two half molds quickly, symmetrically and linearly.

It is a further object of the present invention to close molds with active instruments and to keep these molds closed with passive instruments.

Another object of the present invention is to maintain the mold in a closed state without the direct and continuous operation of active mechanisms such as hydraulic cylinders or pneumatic cylinders.

These objects of the present invention are achieved by a new rotary support device that uses one mechanism to quickly open the mold and has an associated locking mechanism on the mold.

The present invention has a fixed frame (F) having a base (F1) and a central column (F2), and a circular orthogonal plate (O2) that rotates around the central column (F2), a plurality of mold (S) is orthogonal plate On the rotary support device radially side-by-side above (O2), each mold (S) consisting of an upper half mold (Sa) and a lower half mold (Sb): a side column (F3) and a crossbar (F4) are the base The rotation support apparatus which is integrally formed in F1 and the center column F1, and which opens and closes two half molds Sa and Sb is provided in the said side pillar or the crosspiece.

In the present invention, each of the two or more devices each includes an upper hydraulic cylinder (U1a, U2a) and a lower hydraulic cylinder (U1b, U2b), the lower hydraulic cylinder is directly or indirectly opposite the upper hydraulic cylinder (half mold (Sa) , Sb).

In addition, the hydraulic cylinders U1a and U1b are positioned in front of the closing hydraulic cylinders U2a and U2b on the basis of the rotation direction of the circular orthogonal plate O2 for opening. In addition, two elements C1 and C2 having a C-shaped cross section, each of which has a wing Cf perpendicular to the opening direction of the two half molds Sa and Sb, are provided in the sliding lock mechanism C. The wings Cf of the elements C1 and C2 face the wings of the other elements, respectively, and the width between the middle walls Cg of each of the two elements C1 and C2 is the width of the half molds Sa and Sb. Wider, the two elements C1, C2 slide out of the half molds Sa, Sb and close these half molds.

Moreover, the mechanism N for moving the locking mechanism C of two half molds Sa and Sb to radial direction is further provided. It is preferable that the wheel Cr be attached to the locking mechanism C of the two half molds Sa and Sb to move on the sliding surface R.

In addition, both inner surfaces of the wings Cf of the two elements C1 and C2 of the locking mechanism C are inclined in the forward direction of the locking mechanism C. When the closing movement is completed, the respective wings Cf are 2 It is advisable to apply closing pressure to the open half molds Sa and Sb.

In addition, both elements C1 and C2 of the locking mechanism C are connected to each other through the half molds Sa and Sb, and are coupled to the surface of the upper half mold Sa, specifically the lower half mold Sb. A coupling element Ag is provided on the surface opposite the face, which causes the coupling element Ag to be coupled to the upper plates P1a and P2a connected to the upper hydraulic cylinders U1a and U2a.

In addition, the upper plates P1a and P2a are connected to the upper hydraulic cylinders U1a and U2a via hydraulic cylinders M1a and M2a orthogonal to the opening directions of the half molds Sa and Sb, and the upper half molds Sa. It is arranged to catch or loosen the coupling element (Ag) of.

In addition, the coupling element Ag is formed of a cylindrical body Ag 'and a head Ag ", and slots Ps are formed in the plates P1a and P2a, and the width of the slot is the upper half mold Sa. The body Ag 'of the coupling element Ag) is wide enough to fit but narrower than the head Ag ".

In addition, a vertical rod Bs is provided at the corner of the upper half mold Sa at the innermost side with respect to the orthogonal plate O2, and this vertical rod slides on a guide in the orthogonal plate O2. The upper half mold Sa can be moved in a direction perpendicular to O2), and a sliding block Bp parallel to the orthogonal plate O2 is attached to the lower end of the vertical rod Bs.

In addition, a horizontal guide F5 is provided on the base F1 of the fixed frame F, which is upper in the path height of the lower sliding block Bp between the opening and closing positions of the half molds Sa and Sb. Rotating support device, characterized in that the half mold (Sa) can be raised and maintained.

In addition, the plastic material injector I is disposed under the orthogonal plate O2 to inject the plastic material from the bottom into the two half molds Sa and Sb closed by the closing hydraulic cylinders U2a and U2b. The injector I may be arranged horizontally to contact the orthogonal plate O2.

Meanwhile, the plastic material is molded into the open half molds (Sa, Sb), and the plastic inserts having different colors or densities are put into the open half molds (Sa, Sb) and then the plastic material is injected.

In the present invention, the half molds (Sa, Sb) are opened in the following steps.

Rotating the circular orthogonal plate O2 to position the half molds Sa and Sb to open at the height of the opening hydraulic cylinders U1a and U1b;

Stretching the upper hydraulic cylinder U1a until it contacts the upper half mold Sa;

The hydraulic cylinders U1a, U1b apply further pressure to the two half molds Sa, Sb;

Separating the two half molds Sa, Sb from the locking mechanism C such that the two half molds are not in a closed state by the locking mechanism other than the hydraulic cylinders U1a, U1b; And

-Rapidly retracting the upper hydraulic cylinder U1a and stopping the pressure exerted by the lower hydraulic cylinder U1b, thereby rapidly separating the two half molds Sa and Sb.

The half molds Sa and Sb are closed in the following steps.

Rotating the orthogonal plate O2 with the half molds Sa and Sb positioned so as to be closed at the heights of the closing hydraulic cylinders U2a and U2b;

Extending the upper hydraulic cylinder U2a until the two half molds Sa and Sb meet each other;

The hydraulic cylinders U2a and U2b apply further pressure to the half molds such that the two half molds Sa and Sb press against each other;

The locking mechanism C until both inclined surfaces Cf1 of the wings Cf of each of the two elements C1 and C2 of the locking mechanism C push the two half molds Sa and Sb completely to close the half molds. Advancing; And

Retract the hydraulic cylinder so that the upper hydraulic cylinder (U2a) falls from the upper half mold and stop the pressurization of the lower hydraulic cylinder (U2b) so that the two half molds (Sa, Sb) are closed only by the locking mechanism (C). To maintain.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of a rotation support device according to the present invention;

2 is a plan view of FIG. 1;

3 shows a detail of the mold S and the locking mechanism C, showing a part of the disk O and the fixing frame F;

4A is a plan view showing a connection relationship between the plates P1a and P2a and the hydraulic cylinders M1a and M2a;

4B is a side view showing a mechanism for opening and closing two half molds Sa and Sb.

1 is a side view of the rotary support device according to the present invention and Figure 2 is a plan view.

The disk O rotates horizontally about the fixed frame F of the rotation support device. The fixed frame F is composed of a base F1, a central column F2, and two or more side pillars F3. An appropriate crosspiece F4 is horizontally disposed between the side column F3 and the central column F2. Side pillars (F3) are arranged close to each other, to form a fan shape with the central column (F2) and crosspiece (F4). The arcuate guide F5 is horizontally disposed at the height of the center column F2 between the side columns F3 on the base F1 of the fixed frame F.

The motor V installed in the fixed frame F rotates the disk O. The disk O consists of a vertical cylindrical body O1 installed to rotate on the central column F2 of the fixed frame F and a orthogonal plate O2 disposed at right angles to the vertical cylindrical body O1. The orthogonal plate O2 is horizontally arranged and is circular or annular. Various molds S and associated locking mechanisms C are arranged radially side by side along the upper edge of the orthogonal plate O2.

3 shows a detail of the mold S and the locking mechanism C, showing a part of the disk O and the fixing frame F. As shown in FIG. Each mold S consists of two half molds Sa and Sb. In this embodiment, the two half molds Sa and Sb have a shoe shape, specifically a slipper shape, and an inner element core Si may be used.

The lower half mold Sb is fixed to the circular orthogonal plate O2, and the upper half mold Sa moves up and down with respect to the orthogonal plate O2. The innermost edge of the upper half mold (Sa) is integral with the orthogonal plate (O2) and slides along the opposite vertical rod (Bs) in the orthogonal plate (O2) to move at right angles to the orthogonal plate (O2). Maintain alignment with Sb). The lower end of the vertical bar (Bs) has a sliding block (Bp) parallel to the circular orthogonal plate (O2).

There is a coupling element Ag on the surface of the upper half mold Sa opposite to the lower half mold Sb, which is in contact with the lower half mold Sb, which is a bolt type and is composed of a cylindrical body Ag 'and a head Ag "( 4b).

4B shows a mechanism for opening and closing two half molds Sa and Sb, which has a top plate Pa in which a slot Ps is formed and a pair of hydraulic cylinders Ua and Ub. There are a total of two pairs of hydraulic cylinders U1a, U1b, U2a, U2b, and two top plates P1a, P2a are fixed to the side columns F3 of the fixed frame F. One of these pairs of hydraulic cylinders U1a and U1b is for opening the upper half mold Sa, and the other hydraulic cylinders U2a and U2b are for closing the mold Sa.

The upper hydraulic cylinders U1a and U2a with the associated plates P1a and P2a are for moving while supporting the upper half mold Sa in a direction perpendicular to the engagement surface of the two half molds Sa and Sb.

The main function of each of the lower hydraulic cylinders U1b and U2b is to counteract the closing pressure of the upper hydraulic cylinders U1a and U2a. In particular, the width of the slot of each of the upper plates P1a, P2a is wide enough to fit the body Ag 'of the engaging element Ag of the upper half mold Sa, but narrower than the width of the head Ag "of the engaging element. Each plate (P1a, P2a) is connected to the upper hydraulic cylinders (U1a, U2a), respectively orthogonal to the opening direction of the two half molds (Sa, Sb), these hydraulic cylinders (M1a, M2a) The half molds (Sa, Sb) are opened through (), and the moving directions of the hydraulic cylinders (M1a, M2a) are orthogonal to the opening directions of the half molds (Sa, Sb) and the slots (Ps) of the plates (P1a, P2a) Parallel

The upper cylinders U1a and U2a of the half molds Sa and Sb and the lower cylinders U1b and U2b are arranged opposite to each other, so that the upper cylinders U1a and U2a are orthogonal to the joining plates of the half molds Sa and Sb. The upper half mold Sa is moved in the direction of the pressure direction, and the lower cylinders U1b and U2b support the lower half mold Sb while being opposed to the closing pressure of the upper half mold Sa and the associated upper hydraulic cylinders U1a and U2a. do.

The mechanism of opening the two half molds (Sa, Sb) ensures a quick and symmetrical opening of these half molds. The movement of the upper half mold Sa by the upper hydraulic cylinders U1a and U2a is restricted or freed by the upper plates P1a and P2a moving in the direction orthogonal to the opening directions of the molds Sa and Sb.

A locking mechanism C for fixing the two half molds Sa and Sb is disposed behind these half molds (see FIG. 4B). Each locking mechanism C consists of two C-shaped elements C1 and C2 located next to each other, which are connected to each other by suitable crossbars. The wings Cf of these elements C1, C2 face each other and the intermediate wall Cg is arranged parallel to the opening direction of the half molds Sa, Sb (see Fig. 4b). Specifically, the distance between the middle walls Cg of the two elements C1 and C2 of the locking mechanism C is slightly wider than the width of the two half molds Sa and Sb, but the wings Cf of these elements are It is arranged to be orthogonal to the opening direction.

Both surfaces Cf1 of the wings Cf of the elements C1 and C2 of the locking mechanism C are inclined toward the forward direction of the locking mechanism C. As shown in FIG. For this reason, the locking mechanism C, specifically two elements C1 and C2, which are side by side, can be easily fitted to the two half molds Sa and Sb, which are then applied to the closed half molds Sa and Sb. Pressure is also minimized.

A wheel (Cr) is attached to the side of the intermediate wall (Cg) of each of the elements (C1, C2) of the locking mechanism (C), specifically the side opposite to the wing (Cf) to smoothly roll on both rails (R). . The locking mechanism C moves on the rail R in a direction orthogonal to the opening direction of the half molds Sa and Sb by the other hydraulic cylinder N.

The locking mechanism (C) is connected to the circular orthogonal plate (O2) and is moved radially by two or more hydraulic cylinders (N), one hydraulic cylinder (N) is located at the height of the mold (Sa, Sb) opening mechanism, The other is located at the height of the mold closure. Since the locking mechanism C closing the pair of molds Sa and Sb is caught by the circular orthogonal plate O2, when the orthogonal plate O2 rotates, the mold and the mold are closed in the vicinity of the side column F3 of the fixing frame F. The associated locking mechanism C is moved at the heights of the hydraulic cylinders U1a, U1b, U2a, U2b.

During molding, the half molds Sa and Sb are engaged and the two elements C1 and C2 of the locking mechanism C move relative to the molds Sa and Sb to close the mold. In this position, the vertical rod Bs of the upper half mold Sa is located directly below the circular orthogonal plate O2 and the sliding block Bp is suspended below the orthogonal plate O2. When the locking mechanism C and the two half molds Sa and Sb come into contact with the hydraulic cylinders U1a and U1b by the rotation of the orthogonal plate O2, the process of opening the half molds Sa and Sb starts as follows. .

The upper hydraulic cylinder U1a is retracted and separated from the two half molds Sa and Sb as it is retracted. In order to open the two half molds Sa and Sb, the upper hydraulic cylinder U1a is extended so that the upper plate P1a is positioned near the coupling element Ag of the upper half mold Sa. The upper plate P1a is moved by the associated hydraulic cylinder M1a and caught by the engaging element Ag of the mold Sa. As both hydraulic cylinders U1a and U1b extend further, pressure is applied to both molds Sa and Sb to tighten them. When the locking mechanism C moves by the hydraulic cylinder N and opens two molds Sa and Sb, these molds are fixed by the pressure exerted by the hydraulic cylinders U1a and U1b. Finally, when the upper hydraulic cylinder U1a retreats rapidly and the lower hydraulic cylinder U1b stops applying pressure, the two half molds Sa and Sb are separated and opened.

This movement of opening the two half molds (Sa, Sb) is made quickly by the upper hydraulic cylinder (U1a). When the two half molds Sa and Sb are opened quickly in this way, the molding material is prevented from expanding in the space caused by this opening.

When the upper half mold Sa rises, the vertical rod Bs slides along the guide in the circular orthogonal plate O2. In this position, the lower sliding block Bp rises above or above the height of the guide F5 of the base F1.

The operator removes the product from the molds Sa and Sb and then cleans these molds if necessary to prepare for the next molding process.

The circular orthogonal plate O2 can be further rotated toward the next step between the removal of the product and the cleaning of the two molds Sa and Sb. Further rotation of the circular orthogonal plate O2 causes the two half molds Sa and Sb to move to the heights of the hydraulic cylinders U2a and U2b, where the two half molds Sa and Sb are ready to be closed. .

During this rotation, the upper half mold Sa is not caught by the upper hydraulic cylinders U1a and U2a. The lower sliding block Bp slides on the guide F5 of the base F1 and raises the upper half mold Sa as well as the vertical rod Bs. When the rotation of the two half molds Sa and Sb toward the hydraulic cylinders U2a and U2b is finished, the engaging element Ag of the upper half mold Sa becomes the slot of the upper plate P2a of the hydraulic cylinder U2a. Ps). In this position, the lower sliding block Bp of the vertical rod Bs of the upper half mold Sa is suspended from the vertical rod Bs past the guide F5 of the base F1.

If the same procedure is reversed, the two half molds (Sa, Sb) are closed.

When the upper hydraulic cylinder (U2a) is extended and the lower hydraulic cylinder (U2b) operates in reverse, the two half molds (Sa, Sb) are combined. As the locking mechanism C is pushed by the hydraulic cylinder N, the C-type elements C1 and C2 move and close the two molds Sa and Sb, at which time necessary pressure is applied due to the inclined edges.

Subsequently, while the upper plate P2a is moved, the engaging elements Ag are separated, the upper hydraulic cylinder U2a is retracted and the lower hydraulic cylinder stops the pressurizing action, so that the two elements C1, The two half molds Sa and Sb are closed by the wing Cf of C2).

When the orthogonal plate O2 rotates, the half molds Sa and Sb rotate with the locking mechanism C. As shown in FIG. During each rotation in succession two times, the pair of half molds Sa and Sb are opened by the hydraulic cylinders U1a and U1b, and the other pair of half molds Sa and Sb that have already been opened are cleaned by the operator. And, another pair of half mold (Sa, Sb) is closed by the other hydraulic cylinder (U2a, U2b), so that the continuous operation is made. According to the present invention, in particular, in the case of a product having two colors or two densities, a process of forming a material by putting the above material is made first, thereby enabling continuous operation.

Various production steps are carried out between closing and reopening a pair of half molds (Sa, Sb), specifically, injecting plastic material, heating two molds (Sa, Sb), and expanding and Next, the second half molds Sa and Sb are opened by maintaining the first temperature and then lowering the temperature.

The plastic material injector I is in a position to inject the plastic material therein as soon as the two half molds Sa and Sb are closed (see FIG. 2).

The two molds Sa and Sb are preferably suitable for producing a single piece. By limiting the size of the rotating support device of such a mold set, it can be put in a general transport container without separating it into several parts. The rotation support of the present invention with the mechanism for quickly opening and closing the mold S as well as the mold S and the associated locking mechanism C has significant advantages.

The hydraulic cylinders Ua and Ub can directly control the opening and closing operations of the half molds Sa and Sb without error with the lever device. Thus, the opening operation is fast, symmetrical and linear.

Since the two elements C1 and C2 of each locking mechanism C can keep the two half molds Sa and Sb closed in the EVA expansion stage, the hydraulic cylinders U1a, U1b, U2a and U2b are There is no need to apply pressure.

The rotation support device of the present invention can be placed in a narrow space, specifically, in a transport container, where the entire structure does not need to be disassembled and the circular orthogonal plate O2 does not need to be separated.

The upper half mold Sa is independent of the hydraulic cylinders U1a and U2a by using the lower sliding block Bp and the vertical rod Bs fixed to the upper half mold Sa and the guide F5 of the base F1. Can be maintained in an elevated state. Since there is one mechanism for opening and closing the two half molds Sa and Sb, in addition to limiting the size of the device, it is possible to reduce the stoppage of the device due to the opening and closing error of the hydraulic cylinders Ua and Ub.

Claims (19)

It has a fixed frame (F) having a base (F1) and a central column (F2), and a circular orthogonal plate (O2) to rotate around the central column (F2), several mold (S) on the orthogonal plate (O2) In the radially side by side, each mold (S) consists of an upper half mold (Sa) and a lower half mold (Sb). The side column F3 and the cross bar F4 are integrally formed on the base F1 or the center column F1, and at least two devices for opening and closing the two half molds Sa and Sb are the side columns or the cross bars. Rotational support device, characterized in that installed in. The apparatus of claim 1, wherein each of the two or more devices includes upper hydraulic cylinders U1a and U2a and lower hydraulic cylinders U1b and U2b, and the lower hydraulic cylinder is directly or indirectly opposite the upper hydraulic cylinder. Rotation support device which acts on (Sa, Sb). The hydraulic cylinders U1a and U1b according to claim 1 or 2, characterized in that the hydraulic cylinders U1a and U1b are positioned in front of the closing hydraulic cylinders U2a and U2b based on the rotational direction of the circular orthogonal plate O2 for the purpose of opening. Rotary support. The two elements (C1, C2) according to any one of claims 1 to 3, wherein the wings (Cf) perpendicular to the open direction of the two half molds (Sa, Sb) are respectively attached. Is provided in the sliding locking mechanism C, the wings Cf of the elements C1 and C2 face the wings of the other elements, respectively, and the middle wall Cg of each of the two elements C1 and C2. A width between the half molds (Sa, Sb), so that the two elements (C1, C2) slide outside the half molds (Sa, Sb) to close these half molds. The device (1) according to any one of claims 1 to 4, further comprising a mechanism (N) for radially moving the locking mechanisms (C) of the two half molds (Sa, Sb). Rotary support. Rotational support according to any one of claims 1 to 5, characterized in that the wheel (Cr) rests on the locking mechanism (C) of the two half molds (Sa, Sb) and moves on the sliding surface (R). Device. The inner surface of both of the wings Cf of each of the two elements C1 and C2 of the locking mechanism C is inclined in the forward direction of the locking mechanism C. , When the closing movement is completed, each wing (Cf) is a rotary support device, characterized in that for applying the closing pressure to the two half mold (Sa, Sb). 8. Rotating support device according to any one of the preceding claims, characterized in that both elements (C1, C2) of the locking mechanism (C) are connected to each other via half molds (Sa, Sb). 9. The joining element Ag according to claim 1, wherein the joining element Ag is provided on the surface of the upper half mold Sa, in particular on the surface opposite to the joining surface with the lower half mold Sb. Rotary element, characterized in that the element (Ag) is coupled to the upper plate (P1a, P2a) connected to the upper hydraulic cylinder (U1a, U2a). The upper hydraulic cylinder (1) according to any one of claims 1 to 9, wherein the upper plates (P1a, P2a) pass through the hydraulic cylinders (M1a, M2a) orthogonal to the opening directions of the half molds (Sa, Sb). Rotational support device characterized in that it is connected to U1a, U2a) is caught or released on the coupling element (Ag) of the upper half mold (Sa). The joining element Ag comprises a cylindrical body Ag 'and a head Ag ", and slots Ps in the plates P1a and P2a. And the width of this slot is wider than the head Ag "of the body Ag 'of the coupling element Ag of the upper half mold Sa, but narrower than the head Ag". 12. The vertical bar Bs according to any one of the preceding claims, wherein a vertical bar Bs is provided at the corner of the upper half mold Sa that is innermost with respect to the orthogonal plate O2. Sliding ride on the guide in the, can move the upper half mold (Sa) in a direction perpendicular to the orthogonal plate (O2), the lower end of the vertical rod (Bs) sliding block parallel to the orthogonal plate (O2) ( Rotational support device characterized in that the Bp). The horizontal guide F5 is installed on the base F1 of the fixed frame F, and the guide is positioned between the opening and closing positions of the half molds Sa and Sb. Rotational support device, characterized in that to maintain the upper half mold (Sa) in the path height of the lower sliding block (Bp) of the rise. The two half molds (1) according to any one of claims 1 to 13, wherein the plastic material injector (I) is disposed below the orthogonal plate (O2), and is closed by the closing hydraulic cylinders (U2a and U2b). Sa, Sb) rotation support device characterized in that the plastic material can be injected from the bottom. The rotation support apparatus according to any one of claims 1 to 14, wherein the plastic material injector (I) is disposed horizontally in contact with the orthogonal plate (O2). 14. The rotary support device according to claim 13, wherein the plastic material is molded into an open half mold (Sa, Sb). 17. A rotary support according to claim 16, wherein plastic inserts of different colors or densities are placed in open half molds (Sa, Sb) and then plastic material is injected. 18. The rotation support apparatus according to any one of claims 1 to 17, wherein the half molds (Sa, Sb) are opened in the following steps. Rotating the circular orthogonal plate O2 to position the half molds Sa and Sb to open at the height of the opening hydraulic cylinders U1a and U1b; Stretching the upper hydraulic cylinder U1a until it contacts the upper half mold Sa; The hydraulic cylinders U1a, U1b apply further pressure to the two half molds Sa, Sb; Separating the two half molds Sa, Sb from the locking mechanism C such that the two half molds are not in a closed state by the locking mechanism other than the hydraulic cylinders U1a, U1b; And -Rapidly retracting the upper hydraulic cylinder U1a and stopping the pressure exerted by the lower hydraulic cylinder U1b, thereby rapidly separating the two half molds Sa and Sb. 19. The rotary support apparatus according to any one of claims 1 to 18, wherein the half molds (Sa, Sb) are closed in the following steps. Rotating the orthogonal plate O2 with the half molds Sa and Sb positioned so as to be closed at the heights of the closing hydraulic cylinders U2a and U2b; Extending the upper hydraulic cylinder U2a until the two half molds Sa and Sb meet each other; The hydraulic cylinders U2a and U2b apply further pressure to the half molds such that the two half molds Sa and Sb press against each other; The locking mechanism C until both inclined surfaces Cf1 of the wings Cf of each of the two elements C1 and C2 of the locking mechanism C push the two half molds Sa and Sb completely to close the half molds. Advancing; And Retract the hydraulic cylinder so that the upper hydraulic cylinder (U2a) falls from the upper half mold and stop the pressurization of the lower hydraulic cylinder (U2b) so that the two half molds (Sa, Sb) are closed only by the locking mechanism (C). To maintain.

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