KR20110112032A

KR20110112032A - Diffusers for injection molding cooling system

Info

Publication number: KR20110112032A
Application number: KR1020100031417A
Authority: KR
Inventors: 유동진
Original assignee: 페트원 주식회사
Priority date: 2010-04-06
Filing date: 2010-04-06
Publication date: 2011-10-12

Abstract

The present invention relates to a take-out cooling device for simultaneously proceeding the cooling operation while taking out the injection-molded molding in the injection molding machine,
In the ejection apparatus mounted on a conventional injection molding machine, the ejection apparatus includes a ejection plate having a plurality of ejection pipes having a cooling air suction passage and a suction passage therein longitudinally and horizontally mounted therein, and performing a cooling action by the cooling air. The ejection cylinders mounted in plural to the ejection plates may include a hollow portion into which a preform is inserted, a cooling air spraying hole, a cooling air exhaust hole, and a cooling air jet for supplying and discharging cooling air from the outer circumferential edge to the inner hollow portion. A cooling cylinder formed by forming a spiral cooling air passage having a hole; and a cover cylinder coupled to block an outer periphery of the cooling cylinder from the outside; and a lowering operation in a lower portion of the hollow portion of the cooling cylinder to form a preform. And a valve cylinder having a lifting hole therein; and inserted into the valve cylinder to transfer pressure of the compressed air. By the fixed pin for raising and lowering the valve cylinder by a predetermined width; provides a blowout cooling device for injection molding machine consisting of the preform take-out and cooling at the same time to improve the cooling rate, the phenomenon of scratches on the surface of the preform It is to be excluded.

Description

Injection molding cooling system for injection molding machine {Diffusers for injection molding cooling system}

The present invention relates to a take-out cooling device for simultaneously carrying out the cooling operation while taking out the injection-molded molding in the injection molding machine, and more particularly, to take out the injection-molded molding in the mold mounted on the injection molding machine and to transfer it to the next step. The present invention relates to a take-out cooling device for an injection molding machine, provided with a take-out device, and having a cooling function for cooling the molded product to be drawn out using cooling air.

In general, an injection molding machine has a moving plate mounted on a tie-bar for reciprocating operation by a compression cylinder on an upper part of a fixed die, and a clamping device on which a moving plate and a fixed mold are mounted, respectively. And a nozzle for supplying the synthetic resin melt, which is an injection material, to the fixed mold through the fixed plate, a melting device for melting the synthetic resin support material, and a taking out device for taking out the molded product from the mold and moving it to the reservoir.

In addition, in the injection molding machine, the ejection means for taking out a molded product from a mold is commonly used as an ejector ejection means for ejecting and ejecting a molding by using an ejector pin reciprocating by the operation of a cylinder. In order to prevent the phenomenon of scratches on the surface of the product is applied suction suction means using compressed air.

The molding molded and discharged in the injection molding machine is a molten synthetic resin melt is solidified in the mold and is molded, so that the molded product is discharged at a considerable high temperature. There is a fear that the molding will cause deformation.

As a means for preventing deformation during the movement of the molded article, a cooling means for cooling the molded article is provided to the take-out device. The cooling means includes air-cooled cooling means for cooling by forcibly injecting cooling air, and cooling. Water-cooled cooling means for supplying water to the take-out apparatus to cool the molded article taken out is applied and used.

Briefly describing the configuration of the cooling means, the robot arm for taking over and moving the molding from the mold while moving in and out between the stationary mold and the movable mold; a molding gripping means mounted on the robot arm to grip or adsorb a plurality of moldings And a cooling plate provided to a plurality of holding means mounted on the taking-out plate, and configured to cool the molding by supplying cooling water or cooling air to the holding means provided on the taking-out plate. It is being applied.

An object of the present invention is to provide a cooling means for forcibly cooling a high temperature preform using cooling air in the process of taking over and moving a molded product drawn out of an injection mold.

Another object of the present invention is to provide an air-cooled cooling means for forcibly supplying cooling air by means of cooling the preform, but a gripping means for preventing the preform coupled to the take-out device from being released by the supplied cooling air. To provide for other purposes.

The present invention is to provide a blowout cooling apparatus that can be most suitably applied when injection molding a preform, and the present invention will be described to solve the above object.

A formulation device comprising a fixed die fixed to the upper portion of the base and a movable die reciprocating on the tie bar; In the conventional injection molding machine consisting of; take-out device to take out the molded product and deliver it to the cooling transfer device for cooling and transfer operation,

The take-out device comprises a take-out base for entering and exiting by a compression cylinder while reciprocating in a moving tray, and a plurality of take-out cylinders mounted on the take-out base to take over and cool the preform, and the take-out cylinder for cooling The cooling air injection hole and the cooling air discharge hole for supplying the cooling air are formed, and a circulation path is formed in the hollow portion in which the preform is accommodated, and the cooling air moves along the circulation path so that the cooling action proceeds. It is to solve the purpose.

The blow-out cooling apparatus of the present invention having the above-described configuration, the suction molded out of the injection-molded preform using the suction force, so that no scratch is generated on the surface of the preform, and cooled by using the cooling air in the process of moving the extracted preform As it can, the cooling efficiency is increased.

1 is a plan view of a conventional injection molding machine to which the present invention is applied, FIG. 2 is a perspective view of a take-out cooling apparatus of the present invention, FIG. 3 is a perspective view showing the take-out plate to which the present invention is applied, and FIG. 4 is a take-out cooling apparatus. 5 is an exploded perspective view of the main part of the present invention, Figure 6 is an enlarged cross-sectional view of the main part of the present invention, Figures 7a to e is a half sectional perspective view showing the main part operating state of the present invention, Figure 8 is a cooling cylinder Half sectional perspective view showing the mounting state of the valve cylinder coupled to the.

The present invention relates to a preform extraction cooling apparatus that can be suitably applied to an apparatus for taking out and cooling a preform, which is the main object of the present invention, and describes the present invention for solving the above object.

A conventional preform injection molding machine is a formulation device consisting of a fixed die fixed to an upper portion of a base and a movable die reciprocating on a tie bar, a melter for melting synthetic resin, and supplying a resin liquid to a fixed mold mounted to the fixed die. Melting apparatus consisting of a nozzle to take out, the take-out device for taking out the molded product from the mold and deliver it to the cooling transfer device for cooling and transfer operation.

The present invention relates to a preform ejection apparatus provided in the injection molding machine described above.

A cooling air suction path and a suction path are formed in the vertically and horizontally therein, and include a blowout plate equipped with a plurality of blowout cylinders that perform cooling by cooling air.

A plurality of ejection cylinders mounted on the ejection plate,

A spiral cooling air flow path having a hollow portion into which a preform is inserted, and a cooling air injection hole, a cooling air discharge hole, and a cooling air injection hole for supplying and discharging cooling air from the outer circumferential edge to the inner hollow portion. Cooling cylinder;

A cover cylinder for forming a closed spiral flow path by blocking an outer periphery of the cooling cylinder from the outside; and

A valve cylinder configured to lift and operate a small portion of the cooling cylinder by lowering and lowering the hollow part of the cooling cylinder;

Is inserted into the valve cylinder to transfer the pressure of the compressed air to the fixed pin to move the valve cylinder to a predetermined width; it is configured to.

The present invention having such a configuration will be described in more detail with reference to the accompanying drawings.

As shown in the exploded perspective view of FIG. 3, the blowout plate 1 has a cooling air supply path 3 connected to the discharge line 51 of the compressor 50 and a suction force for sucking the preform P therein. A base plate 2 which connects the suction passage 4 to be transferred to the suction line 52 of the compressor 10 and forms first and second connection holes 5 and 5 'to communicate with the upper surface; Wow,

A plurality of blowout cylinders 10 are mounted on the upper surface, and a cool air supply path 7 for supplying cooling air to the blowout cylinder 10 and a suction path 8 for transmitting suction force are provided. The air supply passage 7 and the suction passage 8 are installed plates 6 to be connected to each of the first and second connection holes 5, 5 'formed in the base plate 2; Will be.

The cooling air supply path (3) is connected to the discharge line 51 which is discharged the compressed air of the compressor (50) alone, the suction path (4) is the discharge line 51 and the suction line (52) of the compressor (50) ) Are connected at the same time.

A configuration of the ejection cylinders 10 mounted on the ejection plate 1 will be described with reference to FIGS. 4 and 5.

The blowout cylinder 10 includes a hollow portion 12 into which a preform P is inserted, a cooling air injection hole 14, and a cooling air discharge hole for supplying and discharging cooling air to the hollow portion 12. A cooling cylinder (11) having a spiral cooling air flow path (13) formed therein, and having a cooling air injection hole (17) formed at a lower entry portion of the cooling air flow path (13);

A cover cylinder 16 coupled to the outer periphery of the cooling cylinder 11 to block the outside to form a closed spiral cooling air flow path 13; and

Lifting operation in the lower portion of the hollow portion 12 of the cooling cylinder 11 and acts to suck and fix the preform (P), the upper surface is curved corresponding to the lower curved portion (p1) of the preform (P) It has a surface 22, the suction hole 23 is formed in communication with the lower end in the center, and has a lifting hole 21 is inserted into the fixing pin 30 to be described later, the lifting hole 21 A valve cylinder 20 formed by forming a mounting opening part 24 for inserting and fixing the fixing pin 30;

The suction connection hole 31 is inserted into the lifting hole 21 of the valve cylinder 20 to transfer the pressure of the compressed air so that the valve cylinder 20 can be elevated up and down by a predetermined width. The upper outer periphery is fixed pin 30 having an expansion catching portion 32 for determining the lifting interval of the valve cylinder 20;

In the present invention, the diameter of the inner hollow portion 12 of the cooling cylinder 11 to accommodate the preform (P) is formed larger than the diameter of the preform (P) to form a circulation path (r) through which the cooling air can circulate It is configured to form, the upper inlet of the cooling cylinder 11 to form a curved surface (11a) to facilitate the entry of the preform (P), and inclined so as to incline the inner wall of the hollow portion 12 from the bottom to the top The inner wall 12a is formed to form an inclined interval θ having a predetermined angle, so that the inclination starts at the end of the lifting width T at which the valve cylinder 20 inserted into the hollow part 12 moves up and down. To construct.

The valve cylinder 20 which is operated up and down under the hollow part 12 of the cooling cylinder 11 forms an upper side of the outer periphery in two stages, and flows in between the inner wall of the hollow part 12 and the valve cylinder 20. A gap t is formed, and the cooling air discharge hole 15 is positioned between the inflow intervals t so that the cooling air discharge hole 15 is opened or closed as the valve cylinder 20 moves up and down.

The operation of the present invention extraction device having the above-described configuration will be described.

As shown in the injection molding machine of FIG. 1, a preform molded from a fixed die 101 and a mold 101 ′ and 103 ′ mounted to the movable die 103 constituting the injection molding machine 100 of the injection molding machine ( P) is drawn out by the take-out plate 1 entering and is taken over to the next process.

The take-out plate 1 is moved forward or backward by the transfer device 121 composed of a feed tray 121 that is moved by a robot arm or driven by a reducer 122, and moves forward and backward. Subsequently, the ejection plate 1 is moved toward the molding die 104 so that the preform P is inserted into the internal hollow 12 of the cooling cylinder 11 constituting the ejection cylinder 10.

FIG. 7A shows a state in which the preform P enters the cooling cylinder 11, and suction force is generated and adsorbed.

In 7b, the valve cylinder 20 is lowered by the suction force to open the cooling air discharge hole 15, and the cooling air is introduced through the cooling air injection hole 13 to be injected through the cooling air injection hole 14 at the upper end. It shows the state which becomes.

In FIG. 7C, after the cooling is completed, compressed air is supplied to the flow pipe 30 to prepare the preform P to be pushed out.

In FIG. 7D, the preform P is completely separated from the cooling cylinder 11 and discharged separately, and the suction pipe body 20 is raised.

FIG. 7E shows that the process returns to the initial state and is ready to adsorb another preform P. FIG.

6 and 7E, the valve cylinder 20 installed in the hollow portion 12 of the cooling cylinder 11 constituting the blowout cylinder 10 has a hollow portion 12 due to the discharge action of the preform described later. In the state where the maximum height is reached and the peak is reached within the lift width T limit, the movement to the molding die 104 proceeds, and then the preform P enters the hollow portion 12 of the cooling cylinder 11. The cooling air discharge hole 15 is blocked by the raised valve cylinder 20.

When the ejection plate 1 moves at a set interval and the preform P completely enters the ejection cylinder 1, the third valve 55 for opening and closing the suction line 52 of the compressor 50 is opened. Suction power is generated.

This suction force is fixed to the bottom of the hollow part 12 inside the cooling cylinder 11 through the suction path 4 of the base plate 2 and the suction path 8 of the installation plate 6 as shown in FIG. The air in the hollow portion 12 is sucked through the pins 30, and the preform P is brought into close contact with and fixed to the upper curved surface 22 of the valve cylinder 20, and the preform P is continuously generated by the suction force. ) Is moved downward to the lowest end of the hollow portion 12.

When the valve cylinder 20 reaches the lower end of the cooling cylinder 11, the cooling air discharge hole 15 is the hollow portion 12 and the outside by the inlet interval (t) formed on the upper side of the valve cylinder 20 Into the open state connecting the, the third valve 55 connected to the suction line 52 is closed, the first valve 53 installed in the cooling line 51 is opened and the compressed air supplied from the compressor ( Hereinafter, "cooling air" is supplied to the cooling air supply path 3 of the base plate 2 constituting the takeout plate 1.

Spiral cooling formed in the outer periphery of the cooling cylinder 11 through the cooling air injection hole 17 is supplied to the cooling air supply path (7) of the installation plate (6) installed in communication with the cooling air supply path (3) The cooling air is supplied to the air passage 13, and the cooling air is injected into the hollow part 12 through the cooling air injection holes 14 formed at the top of the cooling air passage 13.

The injected cooling air cools the preform P while moving from top to bottom through a circulation path r formed between the preform P inserted into the hollow part 12 and the inclined inner wall 12a, and absorbs heat. One cooling air is discharged to the outside through the cooling air discharge hole (15) at the bottom.

The circulation path (r) formed between the inclined inner wall (12a) and the preform (P) is formed in a shape of the upper light lower narrower wider than the upper, narrowing downwards, so that the cooling air easily cools the preform (P) By moving to the outside to discharge the heat of the heated hollow portion 12 through the cooling air discharge hole 15 to the outside.

Through this series of processes, the preform (P) introduced into the cooling cylinder (11) is cooled. This cooling time takes the preform (P) out of the mold and forces the preform (P) to continue. The cooling operation proceeds to the process of moving to the stage of delivery.

After cooling air is supplied by cooling air for a predetermined time (control through a control signal input to the main control), the discharge line 51 of the compressor 50 as shown in FIGS. 7C and 7D and The connected second valve 54 is opened so that the compressed air passes through the suction path 4 of the base plate 2 and the suction path 8 of the installation plate 6 to the central suction connection hole 31 of the fixing pin 30. Compressed air supplied to the elevating hole 21 of the fixing pin 20 to raise the flow pipe 20 and pressurizes the bottom curved portion p1 of the preform P. It is forcibly separated from the cooling cylinder 11 and discharged.

By opening the second valve 54 connected to the discharge line 51, the preform P is separated from the discharge cylinder 1 and discharged, and the valve cylinder 20 is hollow 12 of the cooling cylinder 11. It will be restored to the preparatory stage for the first preform withdrawal by maintaining the elevated state in the), and the preform is withdrawn and cooled and discharged by repeated operation.

In the present invention, the valve cylinder 20 coupled to the hollow portion 12 of the cooling cylinder 11 and the valve cylinder 20 is operated by using compressed air as a means for lifting and lowering the valve cylinder, but the valve cylinder Mounting the pressing pin for elevating the fixed pin 30 coupled to (20) to the plate, and by lifting the plate may be applied to replace the compressed air.

The operation means of the suction pipe 30 using the compressed air and the pressure pins may be carried out by design changes by experts in the same industry, and various lifting means may be provided which are not described in addition to this.

The sealing packing may be installed on the upper inner circumferential surface of the cooling cylinder 11 to improve the sealing force of the hollow part 12, and the cooling air injection holes 14 formed in the cooling cylinder 11 may be hollow parts 12. By inclining toward), it is possible to exclude the phenomenon that the preform (P) is forcibly released by the input cooling air, and the number, size and shape of the cooling air injection holes 14 may be modified in various ways. .

In the present invention, it is installed in the lower end of the hollow portion 120 is a shape of the valve cylinder 20 for opening or closing the cooling air discharge hole 15, the upper portion is narrow and the lower portion is inlet interval using a wide pipe ( Although t) is configured, the width of the inflow gap t is not limited to a certain standard.

One; Ejection plate, 2; Baseplate, 3; 4 for cooling air supply; With suction, 7; With cooling air supply, 8; Aspiration furnace, 10; Ejection cylinder, 11; Cooling cylinder 11a; Curved surface 12; Hollow, 13; Cooling air flow path, 14; Cooling air jet hole, 15; Cooling air outlet holes, 16; Cover cylinder, 17; Cooling air exhaust hole, 20; Valve cylinder, 21; Lifting hole, 22; Curved surface, 23; Suction hole, 24; Opening and closing portion 30; Push pin, 31; Suction connector,

Claims

Conventional preform injection molding machine is a formulation device consisting of a fixed die fixed to the upper portion of the base, a movable die reciprocating on the tie bar; a melt composed of a melter and a nozzle for supplying a resin liquid to the fixed mold mounted to the fixed die In the injection molding machine consisting of; Apparatus; Take-out apparatus for taking out the molded product from the mold to deliver to the cooling transfer device for cooling and transfer operation,
The blower device includes a blower plate having a plurality of blowout cylinders having a cooling air suction path formed therein in a longitudinal and horizontal direction and performing a cooling operation by the cool air.
The discharge plate and the suction line of the compressor are respectively connected to the blowout plate to suck and fix the preform through the suction line, and to supply the cooling air to the blowdown cylinder through the discharge line to cool the preform. Blow-out cooling device for injection molding machine.

The method of claim 1,
The blowout cylinder mounted to the blowout plate includes a hollow part into which a preform is inserted, a cooling air injection hole, a cooling air discharge hole, and a cooling air injection hole for supplying and discharging cooling air from the outer peripheral part to the hollow part of the inner part. A cooling cylinder formed by forming a spiral cooling air flow path; and
A cover cylinder coupled to block an outer periphery of the cooling cylinder from the outside; and
Lifting operation in the lower limit of the lifting width in the lower portion of the hollow cylinder of the cooling cylinder to suck and fix the preform, the valve cylinder having a lifting hole therein; And,
And a fixing pin inserted into the valve cylinder to transfer the pressure of the compressed air to move the valve cylinder up and down by a predetermined width.

The method of claim 2,
The diameter of the hollow inside the cooling cylinder is larger than the diameter of the preform to form a circulation path through which the cooling air can be circulated, and the upper inlet of the cooling cylinder is formed by forming a curved surface to facilitate the entry of the preform smoothly. Blow-out cooling device for injection molding machine.

The method of claim 2,
Form an inclined interval by forming an inclined inner wall to incline the inner wall of the hollow part of the cooling cylinder from the bottom to the inclined interval, characterized in that the inclined starts at the end of the lifting width of the valve cylinder inserted into the hollow part Blow-out cooling device for injection molding machine.

The method of claim 2,
The valve cylinder which is operated up and down at the lower part of the hollow part of the cooling cylinder has an upper side of the outer periphery formed in two stages to form an inlet gap between the inner wall of the hollow part and the valve cylinder, and the cooling air outlet hole is located between the inlet gaps. A blow-out cooling apparatus for injection molding machine, characterized in that configured to open or close the cooling air discharge hole as the valve cylinder is raised and lowered.

The method of claim 2,
And a mounting opening portion formed at one side of the outer circumferential portion of the valve cylinder, and configured to insert and engage a fixing pin at a side portion thereof through the mounting opening portion.

The method of claim 2,
Cooling air injection holes formed in the upper portion of the cooling cylinder has a plurality of ejection cooling apparatus for injection molding machine, characterized in that formed in a plurality to be inclined toward the bottom.