KR200365846Y1 - Apparatus for injection blow molding - Google Patents

Abstract

The present invention relates to an injection blow molding apparatus, wherein a plurality of preform molding cavities are formed on a vertical center line of a fixed disc in a molding apparatus for molding a synthetic resin container, and a plurality of blow cavities are formed on both left and right sides of the preform molding cavity. While the formed mold is disposed, the transfer disk transported at the position opposite to the fixed disk is configured to be linearly moved in a direction orthogonal to the transport direction of the transfer disk while the core is installed so that preform molding and blow molding can be simultaneously performed. In addition, it can be made continuously, and the productivity per unit time can be remarkably improved, and since a general-purpose injection machine can be used without using a dedicated injection blower, the equipment can be designed at a relatively low price. Can be lowered It is to increase the power greatly.

The injection blow molding apparatus according to the present invention is fixed and installed at one end in a horizontal direction, and a plurality of preform molding cavities are formed at regular intervals along a vertical center line on the front side, and a synthetic resin is supplied into the preform molding cavity at the rear center. A fixed disc having a mold installation hole having a predetermined size connected to both sides of the front surface corresponding to a position spaced apart from the respective preform molding cavities by a predetermined distance from the preform molding cavity; A transfer disc reciprocating linearly moved to be in close contact with and separated from the stationary disc by the action of the hydraulic cylinder in a state in which it is installed opposite to the stationary disc; A mold having a plurality of blow cavities having the same shape as that of the product, the molds being positioned to face each other in each of the mold installation holes formed on the left and right sides of the fixed disk; Mold opening and closing member for controlling the opening and closing state of the mold while sliding the left and right by a predetermined distance by the action of the external force in the state coupled to the upper and lower surfaces of the mold from the upper and lower surfaces of the fixed disk; The core plate is installed in a direction perpendicular to the moving direction of the transfer disk in the front of the transfer disk facing the front surface of the fixed disk, the reciprocating linear movement in a direction orthogonal to the moving direction of the transfer disk by the action of the hydraulic cylinder Wow; A plurality of cores projecting in a predetermined length from a front surface of a core plate corresponding to a position coinciding with a center of each preform molding cavity on the fixed disk and a center of each blow cavity on one of the molds; A plurality of eject pins inserted and installed to reach the inner side of the core plate from the rear end of the transfer disc, the plurality of eject pins being linearly moved back and forth by the action of the hydraulic cylinder; A mill pin which is moved over a certain distance range by the action of an eject pin in a state of being fitted inside the core plate; A neck release member that is pushed forward by a push pin in a state of being fitted to each core of the front side of the core plate and is separated from the neck portion of a molded product inserted into the core; A molded product which is fitted to each core at the front of the neck detachment member and is detached from the core by the action of the neck detachment member while being supported by a guide piece coupled to slide forward and backward from the lower surface of the transfer disc, and simultaneously removes the molded product from the core. It includes a take out member.

Description

Injection blow molding machine {APPARATUS FOR INJECTION BLOW MOLDING}

The present invention relates to an injection blow molding apparatus, and more particularly, a plurality of preform molding cavities are formed on a vertical center line of a fixed disc in a molding apparatus for molding a synthetic resin container, and the preform molding Molds having a plurality of blow cavities are arranged on both left and right sides of the cavity, while the transfer disc transported at a position opposite to the fixed disc is straight in a direction orthogonal to the transfer direction of the transfer disc with the core installed. It can be configured to move preform and blow molding at the same time, as well as to be able to be performed continuously to significantly improve the productivity per unit time, it is possible to use a universal injection machine without using a dedicated injection blower Can design equipment at relatively low price It may reduce the cost of the control product so that the injection can significantly increase the competitiveness blow relates to a molding apparatus.

BACKGROUND ART In general, an extrusion hollow molding apparatus has been proposed as a device mainly used for molding various hollow synthetic resin containers such as synthetic resin containers such as pharmaceutical containers or beverage containers.

The extrusion hollow molding apparatus is composed of a fixed mold fixed to one side, and a transfer mold which is disposed at a position spaced apart from the fixed mold by a predetermined distance and reciprocally linearly moved so as to be in close contact and separation with respect to the fixed mold. The opposite surface of the metal mold has a structure in which a cavity having the same shape as that of the desired container is formed.

In order to mold various hollow synthetic resin containers using such a conventional extrusion molding apparatus, a tube-shaped plastic parison supplied from an extruder is placed between a fixed mold and a transfer mold, and then a transfer mold. To blow the compressed air into the parison in a state in which the opposite sides of the fixed mold and the transfer mold are in close contact with each other, and the parison is formed according to the shape of the cavity formed on the fixed mold and the transfer mold. As it is expanded, a product of a desired shape is molded.

However, when the hollow synthetic resin container is to be molded using such a conventional extrusion molding apparatus, there is a problem in that the productivity per unit time is very low because only one product is molded in one molding operation.

In order to overcome such a problem, when a plurality of cavities are formed in one mold, the diameter of the parison must be increased, and thus, an extruder must be replaced.

On the other hand, if you want to import foreign equipment in order to improve such a problem, too expensive, there is a problem that the cost of the product is increased, the market competitiveness is significantly reduced.

In order to solve such a conventional problem, an object of the present invention is a plurality of preform molding cavities are formed on the vertical center line of the stationary disk in a molding apparatus for molding a synthetic resin container, a plurality of preform molding cavities on both left and right sides A mold having a blow cavity is disposed, while a preform molding and a blow molding are formed in the transfer disk which is transported at a position opposite to the fixed disk, so as to move linearly in a direction orthogonal to the transfer direction of the transfer disk with the core installed. In addition to being able to be done at the same time, it can be done continuously so that the productivity per unit time can be remarkably improved, and since a general-purpose injection machine can be used without using a dedicated injection blower, the equipment can be designed at a relatively low price. Lower the cost of the product As a result, it is to provide a new injection blow molding apparatus that can greatly increase the competitiveness.

1 is a plan view showing an injection blow molding apparatus according to the present invention,

Figure 2 is an exploded perspective view showing a fixed disk and the transfer disk in the injection blow molding apparatus according to the present invention,

Figure 3 is an exploded perspective view showing a fixed disc in the injection blow molding apparatus according to the present invention,

Figure 4 is a perspective view of the bonded state of the stationary disk in the injection blow molding apparatus according to the present invention,

Figure 5 is a perspective view showing a cross-section of the stationary disc in the injection blow molding apparatus according to the present invention,

Figure 6 is a perspective view showing a state in which the mold is opened by the mold opening and closing member in the injection blow molding apparatus according to the present invention,

Figure 7 is a side view showing the configuration of the front portion of the transfer disc in the injection blow molding apparatus according to the present invention,

8 is a plan view showing the configuration of the front portion of the transfer disc in the injection blow molding apparatus according to the present invention,

9 is a partial cross-sectional view showing that the core is blow molded by compressed air in a state in which the core is fitted in the blow cavity;

Figure 10 is a plan view showing a state separated from the stationary disk in a state in which the preform is molded in one core at the beginning of the operation in the present invention,

11 is a plan view showing a state in which the core plate is linearly moved to one side in the state of FIG.

12 is a plan view showing a state where a core is inserted into a blow cavity and a preform molding cavity on a mold in the position of FIG. 11;

FIG. 13 is a plan view illustrating a phase Tall removed from the fixed disc after being molded in the state of FIG. 12; FIG.

14 is a plan view showing a state in which the core plate is moved in the opposite direction again after removing the molded article in the state of FIG.

15 is a plan view showing a state in which the core is inserted into a blow cavity and a preform molding cavity on the opposite mold in the position of FIG. 14;

FIG. 16 is a plan view illustrating a state in which the mold is separated from the fixed disc after being molded in the state of FIG. 15.

* Description of the symbols for the main parts of the drawings *

12: fixed disk 14: transfer disk

16: preform molding cavity 20: mold installation hole

22: mold 24: blow cavity

28: mold opening and closing member

In order to achieve the above object, the injection blow molding apparatus according to the present invention is fixed and installed at one end in the horizontal direction, a plurality of preform molding cavities are formed at regular intervals along the vertical center line of the front surface, the preform in the rear end center A stationary disc connected to an injection machine for supplying a synthetic resin into the molding cavity, and having mold installation holes having predetermined sizes on left and right sides of the front surface corresponding to positions spaced from a predetermined distance from the respective preform molding cavities; A transfer disc reciprocating linearly moved to be in close contact with and separated from the stationary disc by the action of the hydraulic cylinder in a state in which it is installed opposite to the stationary disc; A mold having a plurality of blow cavities having the same shape as that of the product, the molds being positioned to face each other in each of the mold installation holes formed on the left and right sides of the front of the fixed disk; Mold opening and closing member for controlling the opening and closing state of the mold while sliding the left and right by a predetermined distance by the action of the external force in the state coupled to the upper and lower surfaces of the mold from the upper and lower surfaces of the fixed disk; The core plate is installed in a direction perpendicular to the moving direction of the transfer disk in the front of the transfer disk facing the front surface of the fixed disk, the reciprocating linear movement in a direction orthogonal to the moving direction of the transfer disk by the action of the hydraulic cylinder Wow; A plurality of cores projecting in a predetermined length from a front surface of a core plate corresponding to a position coinciding with a center of each preform molding cavity on the fixed disk and a center of each blow cavity on one of the molds; A plurality of eject pins inserted and installed to reach the inner side of the core plate from the rear end of the transfer disc, the plurality of eject pins being linearly moved back and forth by the action of the hydraulic cylinder; A mill pin which is moved over a certain distance range by the action of an eject pin in a state of being fitted inside the core plate; A neck release member that is pushed forward by a push pin in a state of being fitted to each core of the front side of the core plate and is separated from the neck portion of a molded product inserted into the core; A molded product which is fitted to each core at the front of the neck detachment member and is detached from the core by the action of the neck detachment member while being supported by a guide piece coupled to slide forward and backward from the lower surface of the transfer disc, and simultaneously removes the molded product from the core. It includes a take out member.

In the present invention, the mold opening and closing member is installed across the upper and lower surfaces of the fixed disk while wrapping one side of the fixed disk, the hydraulic cylinder of the pair of molds in each mold installation hole in the state connected to the rear end of the mold A first rack piece which is linearly moved in the horizontal direction by an action; It is installed across the upper and lower surfaces surrounding the opposite side of the fixed disk in the front spaced apart from the rack piece in a predetermined distance, and opposite to the first rack piece in a state connected to the tip of the opposite mold of the pair of molds in the mold installation hole A second rack piece operated in a direction; And a plurality of pinion gears rotatably installed in the engaged state between the first rack piece and the second rack piece to transmit the driving force of the first rack piece to the second rack piece.

The neck release member in the present invention is fixed to the front plate of the core plate; A tapered piece that is opened while being moved by a predetermined distance outwardly by the action of the mill pin in a state in which it is fitted to the neck portion of the core at left and right sides of the fixing plate corresponding to each of the cores; A plurality of pairs of guide pins are installed to protrude from the inside of the core plate to the outside of the front and gradually open, and the tapered pieces moved outwards by the action of the mil pin in the state of being fitted through the respective taper pieces. Is done.

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

1 is a plan view showing an injection blow molding apparatus according to the present invention, Figure 2 is an exploded perspective view showing a fixed disk and a transfer disk in the injection blow molding apparatus according to the present invention.

In addition, Figure 3 is an exploded perspective view showing a fixed disc in the injection blow molding apparatus according to the present invention, Figure 4 is a perspective view of the combined state of the fixed disc in the injection blow molding apparatus according to the present invention.

In addition, Figure 5 is a perspective view showing a cross-section of the fixed disc in the injection blow molding apparatus according to the present invention, Figure 6 is a perspective view showing a state in which the mold is opened by the mold opening and closing member in the injection blow molding apparatus according to the present invention.

In addition, Figure 7 is a side view showing the configuration of the front portion of the transfer disc in the injection blow molding apparatus according to the present invention, Figure 8 is a plan view showing the configuration of the transfer disc front portion in the injection blow molding apparatus according to the present invention.

9 is a partial cross-sectional view showing that the core is blow molded by compressed air in a state where the core is fitted into the blow cavity.

Referring to this, the injection blow molding apparatus according to the present invention is configured so that the molding of the preform and blow molding for the preform can be performed at the same time.

To this end, the injection blow molding apparatus 10 according to the present invention is a fixed disk 12 of a predetermined size largely fixed and installed at one end in the horizontal direction, and the external force in the state facing the opposite side of the fixed disk 12 It includes a transfer disk 14 is reciprocally linearly moved to be in close contact with and to the fixed disk 12 by the action.

A plurality of preform molding cavities 16 are formed at regular intervals along a vertical center line of the front surface of the fixed disk 12, and an external injection machine 18 that can be used universally inside the rear center of the fixed disk 12. ) Is combined so that the synthetic resin can be injected and supplied into the respective preform molding cavities 16.

Mold installation holes 20 having a predetermined size are formed on both left and right sides of the front surface corresponding to a position spaced a predetermined distance from the formation position of the preform molding cavity 16.

A pair of left and right molds 22 are installed to face each other in each of the mold installation holes 20 formed on both front and right sides of the fixed disk 12, and the opposite surface of the mold 22 has the same shape as the product. A plurality of blow cavities 24 having a shape are formed at regular intervals in the up and down directions.

The opening and closing of the mold 22 which opens or closes the mold 22 disposed in the mold installation hole 20 while the upper and lower surfaces of the fixed disk 12 are reciprocated linearly by a predetermined distance in the installation direction by the action of the hydraulic cylinder 26. The member 28 is provided.

The mold opening / closing member 28 is provided with a first rack piece 28a and a second rack piece 28b installed so as to linearly move in opposite directions at positions spaced apart from each other by a predetermined distance from the upper and lower surfaces of the fixed disk 12 and A plurality of pinion gears 28c meshed with the first rack piece 28a and the second rack piece 28b.

The first rack piece 28a is installed across the upper and lower surfaces of the fixed disk 12 while surrounding one side of the fixed disk 12, and includes a pair of molds 22 in each mold mounting hole 20. It is configured to linearly move in the left and right directions by the action of the hydraulic cylinder 26 in the state connected with the rear end of one mold.

The second rack piece (28b) is installed across the upper and lower surfaces while wrapping the opposite side of the fixed disk 12 in the front spaced apart from the first rack piece (28a), the inside of the mold installation hole (20) It is configured to be operated in the opposite direction to the first rack piece 28a in a state of being connected to the tip of the opposite mold of the pair of molds 22.

The pinion gear 28c is engaged with the first rack piece 28a and the second rack piece 28b in a space between the first rack piece 28a and the second rack piece 28b, and is in the forward and reverse directions. It is configured to transmit the driving force of the first rack piece 28a to the second rack piece 28b while being rotated.

The core plate 30 is fitted in a direction orthogonal to the moving direction of the transfer disc 14 on the front side of the transfer disc 14 facing the front face of the stationary disc 12.

A hydraulic cylinder 32 is connected to a central portion of one side of the core plate 30, and the core plate 30 is in a direction orthogonal to the moving direction of the transfer disc 14 by the action of the hydraulic cylinder 32. It is configured to reciprocate linear movement.

From the front surface of the core plate 30 corresponding to a position coinciding with the center of each preform molding cavity 16 on the stationary disc 12 and the center of each blow cavity 24 on either mold 22 Core 34 protrudes to a predetermined length.

A plurality of eject pins 36 are inserted into the rear end of the core plate 30 from the rear end of the transfer disc 14, and the eject pins 36 are connected from the rear end of the transfer disc 14. By the action of the hydraulic cylinder 38 is configured to move back and forth linearly in a certain distance range.

In addition, the inside of the core plate 30 is provided with a mill pin 40 which is moved forward and backward in a predetermined distance range by the action of the eject pin 36.

On the other hand, the core 34 protruding from the front of the core plate 30 is moved while moving forward by a predetermined distance during the forward transfer of the eject pin 36 to separate the neck portion of the molded part 42 fitted to the core 34 Neck release member 44 is fitted to be coupled.

The neck release member 44 has a fixed plate 44a fixed to the front surface of the core plate 30 and cores 34 at both front left and right sides of the fixed plate 44a corresponding to the positions corresponding to the respective cores 34. The taper piece 44b which is opened while being moved by a predetermined distance by the action of the mil pin 40 in the state of being fitted into the neck portion of the protrusion, and protrudes from the inside of the core plate 30 to be gradually angled toward the outside of the front surface. It consists of a plurality of pairs of guide pins 44c are installed so that the tapered piece 44b moved outwardly by the action of the mill pin 40 in the state fitted through the respective tapered pieces 44b to gradually open. .

The action of the neck release member 44 is supported by each of the cores 34 protruding toward the front of the neck release member 44 by a guide piece 46 coupled to slide back and forth from the lower surface of the transfer disc 14. As a result, the neck portion of the molded article 42 is separated, and at the same time, the molded article extracting member 48 which pulls the molded article 42 out of the core 34 is fitted.

Referring to the operating state of the present invention made as described above are as follows.

10 to 16 are plan views showing an operation of molding a molded article using the injection blow molding apparatus according to the present invention.

Referring to this, when an external force (hydraulic force) is operated at the rear end of the transfer disc 14 in the initial state in which the fixed disc 12 and the transfer disc 14 are separated by a predetermined distance, the transfer disc 14 moves forward. It comes in close contact with the front surface of the stationary disk (12).

At the same time, each core 34 on the core plate 30 coupled to the front surface of the transfer disk 14 has a preform molding cavity 16 on the stationary disk 12 and a blow cavity 24 on the mold 22. It becomes the state fitted to.

In this state, the synthetic resin supplied from the injection machine 18 connected to the rear end center of the fixed disk 12 is introduced into the preform molding cavity 16 through a hot runner therein, and thus the preform molding cavity 16. A preform 50 of a predetermined thickness is formed on the circumferential surface of the core 34 sandwiched therein (see FIG. 10).

In the state in which the preform 50 is formed on one side of the core 34, the transfer disc 14 is moved backward, and then the hydraulic cylinder 38 coupled to the core plate 30 is operated to move the core plate 30 to the transfer disc. It moves in the direction orthogonal to the moving direction of (14) (refer FIG. 11).

Then, when the transfer disc 14 is brought into close contact with the stationary disc 12, the core 34 on which the preform 50 is formed is blown on the mold 22 in the mold installation hole 20 on the left or right side. (24) and the other core is fitted into the preform molding cavity (16).

In this state, as shown in FIG. 9, when the compressed air is supplied through the compressed air injection groove 52 formed from the inside of the core plate 30 toward the core 34, the synthetic resin is supplied through the injection machine 18. The preform 50 inserted into the blow cavity 24 is molded while being expanded in the cavity, and the preform is molded into another core inserted into the preform molding cavity 16.

In the state in which the molded article 42 is molded in the blow cavity 24 as described above, the hydraulic cylinder 26 connected to the first rack piece 28a constituting the mold opening and closing member 28 is operated to operate the first rack piece ( When the 28a) is moved to the left or the right, the pinion gear 28c is engaged and rotated in place, and the second rack piece 28b is moved in the opposite direction while the mold 22 in the mold installation hole 20 is opened.

At the same time, when the transfer disk 14 is transported backward, the molded article 42 formed in the blow cavity 24 and the preform 50 formed on the other core are pulled out (see FIG. 13).

In this state, when the eject pin 36 is moved forward from the rear end of the transfer disk 14, the mil pin 40 inside the core plate 30 is moved in the same direction, and the force of the core plate 30 The tapered piece 44b on the fixed plate 44a fixed to the front surface is opened while being moved forward by a predetermined distance by the action of the guide pin 44c, so that the neck portion of the molded product 42 is separated from the core 34.

At the same time, as the molded article extraction member 48 is moved forward by a predetermined distance, the molded article 42 completely exits from the core 34.

The molded article 42 completely removed from the core 34 by the action of the molded article extracting member 48 is transported to the next process by falling downward in the free fall method.

Then, the core plate 30 is linearly moved in the opposite direction by the action of the hydraulic cylinder 38 and the mold opening and closing member 28 is operated in the opposite direction to close the mold 22 (see FIG. 14).

After the mold 22 is closed, the transfer disk 14 is moved forward by the action of an external force to closely adhere to the front surface of the fixed disk 12, and the core 34 from which the molded product 42 is pulled out again is a cavity for preform molding. The core, into which the preform 50 is formed, is inserted into the blow mold 24 on the opposite mold (see FIGS. 15 and 16).

In this state, as described above, the injection and blow operations are performed at the same time, and after the injection and blow operations are performed, the molding operation is repeatedly performed in the order described above.

According to the present invention, a preform molding cavity is formed on the front center line of the fixed disk, and a mold having a blow cavity formed on both left and right sides thereof is installed, and a core fitted in the preform molding cavity and the blow cavity on the transfer disk. Since the core plate is installed to be linearly moved in a direction orthogonal to the moving direction of the transfer disc, the preform molding and the blow molding can be performed simultaneously, and the productivity per unit time can be remarkably improved. There is an advantage.

In addition, the injection blow molding apparatus according to the present invention can be manufactured at a relatively low price by using a general-purpose injection machine without using a dedicated injection blower, and can lower the cost of the product, thereby significantly increasing the competitiveness. have.

Claims (3)

It is fixed and installed at one end in the horizontal direction, and a plurality of preform molding cavities are formed at regular intervals along the front center line in the front direction, and a rear end center is connected to an injection machine for supplying synthetic resin into the preform molding cavity, and each preform A fixed disk 12 having a mold installation hole having a predetermined size formed on both left and right sides of the front surface corresponding to a position spaced apart from the molding cavity by a predetermined distance; A transfer disk 14 which is reciprocally linearly moved to be in close contact with and to the fixed disk by the action of the hydraulic cylinder in a state in which it is installed opposite to the fixed disk; Molds 22 which are positioned to face each other in each of the mold installation hole formed on the left and right sides of the front of the fixed disk, the mold 22 having a plurality of blow cavities having the same shape as the shape of the product; Mold opening and closing member 28 for controlling the opening and closing state of the mold while sliding the left and right by a predetermined distance by the action of an external force in a state coupled to the upper and lower surfaces of the mold in the upper and lower surfaces of the fixed disk; The core plate is installed in a direction perpendicular to the moving direction of the transfer disk in the front of the transfer disk facing the front surface of the fixed disk, the reciprocating linear movement in a direction orthogonal to the moving direction of the transfer disk by the action of the hydraulic cylinder 30; A plurality of cores (34) projecting in a predetermined length from the front surface of the core plate corresponding to a position coinciding with the center of each preform molding cavity on the stationary disc and the center of each blow cavity on one of the molds; A plurality of eject pins 36 inserted and installed so as to reach the inner side of the core plate from the rear end of the transfer disc, and being linearly moved back and forth by the action of the hydraulic cylinder; A mill pin 40 which is moved over a certain distance range by the action of the eject pin in a state of being fitted inside the core plate; A neck release member (44) which is pushed forward by a push pin in a state of being fitted into each core of the front side of the core plate to separate the neck portion of the molded product inserted into the core; A molded product which is fitted to each core at the front of the neck detachment member and is detached from the core by the action of the neck detachment member while being supported by a guide piece coupled to slide forward and backward from the lower surface of the transfer disc, and simultaneously removes the molded product from the core. Injection blow molding apparatus comprising a blowout member (48). The method of claim 1, The mold opening / closing member 28 is installed across the upper and lower surfaces of the fixed disk while covering one side of the fixed disk, and is connected to the rear end of one mold of a pair of molds in each mold installation hole. A first rack piece 28a which is linearly moved in the horizontal direction by the first rack piece 28a; It is installed across the upper and lower surfaces surrounding the opposite side of the fixed disk in the front spaced apart from the rack piece in a predetermined distance, and the first rack piece and in the state connected to the tip of the opposite mold of the pair of molds in each mold installation hole A second rack piece 28b operated in the opposite direction; Injection is characterized in that it comprises a plurality of pinion gear (28c) rotatably installed in the engaged state between the first rack piece and the second rack piece to transmit the driving force of the first rack piece to the second rack piece. Blow molding equipment. The method of claim 1, The neck release member 44 is fixed plate (44a) fixed to the front of the core plate; A taper piece (44b) that is opened while being moved by a predetermined distance from the front side by the action of the mil pin in a state in which it is fitted to the neck portion of the core on both left and right sides of the fixing plate corresponding to the position corresponding to each core; A plurality of pairs of guide pins are installed to protrude from the inside of the core plate to the outside of the front and gradually open, and the tapered pieces moved outwards by the action of the mil pin in the state of being fitted through the respective taper pieces. Injection blow molding apparatus comprising a (44c).