KR20110059097A

KR20110059097A - Quantitative feeder for injection molding device

Info

Publication number: KR20110059097A
Application number: KR1020090115730A
Authority: KR
Inventors: 최일식
Original assignee: 최일식
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2011-06-02

Abstract

PURPOSE: A quantitative feeder for an injection-molding device is intended to provide uniform color of injection molded products through precise discharge of an amount of a raw material. CONSTITUTION: A quantitative feeder for an injection-molding device comprises a body part(10), a quantitative basket, and a power source. The body part comprises a receiving hole(5), a discharge hole, and a cylindrical space. Coloring material supplied from a coloring hopper is put into through the receiving hole. The discharge hole discharges the coloring material. The cylindrical space is communicated with the receiving hole and the discharge hole. The column-shaped outer surface of the quantitative basket is engaged with the cylindrical space of the body part. The quantitative basket is rotatably mounted in the body part. The coloring-material chamber of the quantitative basket holds an amount of coloring material through an opening corresponding to the receiving hole or the discharge hole according to a rotated state. The power source supplies torque to the quantitative basket.

Description

Quantitative Feeder for Injection Molding Machine {QUANTITATIVE FEEDER FOR INJECTION MOLDING DEVICE}

The present invention relates to a metering feeder for an injection molding machine, and more particularly, to a metering feeder that can be applied to an injection molding machine having a structure including a coloring hopper as a component to express a specific color in a plastic molding.

Injection molding is a kind of plastic molding process and forms the center of a thermoplastic resin molding method. It can be molded from very small forms to large products weighing up to 10 kg, and it can be repeatedly injected to make mass production.

As a raw material for injection molding, it is common to use a compound having a chip shape of several millimeters containing a pigment, a stabilizer, a plasticizer, a filler, and the like as a basic material of plastic.

That is, briefly describing the injection molding process, the compound is placed in a hopper, and then the compound is passed through a heating chamber heated by a predetermined amount by heat transfer, high pressure steam, or the like, into a molten state, and injected using a piston ( The molten plastic is injected into the mold by hardening and injection to harden the mold to form the inner surface of the mold.

As mentioned above, the compound may be provided not only with the main material plastic, but also with a pigment component capable of expressing the color of the molded plastic product. Color problems may not occur.

However, since the compound itself is provided with a specific color, unless the person directly participates in color determination at the manufacturing stage of the compound, a person who wants to obtain a compound to manufacture an injection molding can select a product of a desired color. Not only is there a very low degree of freedom, but the colors of the actual circulating compound are not diverse, and much effort is required to obtain a compound of the desired color.

Therefore, many injection molding manufacturers using injection molding machines have a main hopper containing the above-described compound as shown in FIG. 1 in order to be able to express a specific color in the product even in the manufacturing stage of the injection molding. In addition to (200), mixing the coloring hopper 100 and the coloring hopper 100 and the coloring hopper 100 filled in the main hopper 200 and the coloring hopper 100, which can put a color developing material capable of expressing the color in the injection-molded product An injection molding machine having a structure including the mixing part 150 for the structure may be used.

At this time, on the respective paths of the coloring hopper 100 and the mixing unit 150, the main hopper 200 and the mixing unit 150, a quantitative feeder for the coloring hopper for supplying a predetermined amount of coloring material to the mixing unit 150 ( 1), the main hopper metering feeder 1 'for supplying the compound to the mixing unit 150 by a predetermined amount may be independently installed.

That is, the quantitative feeder 1 for the coloring hopper serves to provide the mixing unit 150 with a predetermined amount of the coloring raw material filled in the coloring hopper 100, and a predetermined amount of the coloring raw material is a certain amount of the compound and Since the part is to be mixed and melted, injection molding, it can be said to be the main part of the injection molding machine, which determines the color of the injection molding produced.

The conventional structure of this metering feeder 1 is shown in FIG.

FIG. 9 is a view schematically showing the structure of a screw type metering feeder which is currently most commonly used. The inlet 5 is a portion communicating with the coloring hopper 100 to receive a coloring material and passing through the metering feeder 1. One color raw material shows a structure that is moved to the mixing unit 150 through the outlet (15).

That is, in the screw type meter feeder, as the internal screw 350 rotates, the colored raw material injected from the inlet 5 moves toward the outlet 15 by a predetermined fraction, and reaches the outlet 15 so as to be discharged out of the feeder. It is a principle.

The advantage of the screw type is that by rotating the screw at a constant speed in one direction by using an electric motor, it is possible to discharge a certain amount of contents for a certain time interval, so that a relatively constant amount of raw materials with a relatively simple structure, operation mechanism Emissions are possible.

However, such a screw-type feeder cannot guarantee the precise supply of colored raw materials because there is no guarantee that raw materials of uniform density are filled between the acids of the screw, and therefore, due to the color difference and the color unevenness of the produced product, In addition to the drawback that defects may occur, a system that can identify the raw material emissions, which varies according to the rotational speed of the screw, the rotation time and input, and the physical properties of the discharged raw materials (e.g. the size of the chip-shaped raw materials, etc.) No, there is also a disadvantage in that the ease of operation is rather poor because it requires a process to check and control the screw rotation time according to the desired raw material discharge every time the conditions change.

Therefore, although a fixed-quantity feeder equipped with electronic equipment with high technology is being developed, including a weight sensor, etc., there are problems such as cost-effectiveness and increased management difficulty due to the complexity of the equipment, regardless of the precision of emissions. It is becoming.

An object of the present invention is to provide a metering feeder for an injection molding machine having a structure that can accurately discharge the raw material supplied from the hopper in a predetermined amount in order to overcome the problems of the conventional metering feeder described above.

It is still another object of the present invention to provide a metering feeder for an injection molding machine which is not only capable of precisely discharging raw materials with a relatively simple structure but also easily controlling the discharge amount.

It is still another object of the present invention to provide a metering feeder for an injection molding machine that is easy to manage.

In order to achieve the above object, the injection molding machine for the injection molding machine according to the present invention, by molding the compound, which is a molding raw material manufactured in the form of chips, including plastic in a molten state in the apparatus to be injected into a mold and hardened to perform a plastic molding operation As a component to be applied to an injection molding machine, a main hopper into which the compound is injected and filled, and a coloring material used to express a specific color in an injection molded product are mixed with the compound supplied through the main hopper in a mixing unit. In the metering feeder for an injection molding machine provided on the path of the coloring hopper and the mixing section in order to quantitatively supply the coloring hopper filled in the coloring hopper of the injection molding machine having a coloring hopper to the mixing section, from the coloring hopper An input port into which the supplied coloring material is input, and the input A body part having a discharge port for discharging the coloring material and positioned opposite to the discharge port, the body part having a cylindrical inner space communicating with the inlet and the discharge hole, and a cylindrical outer surface conforming to the cylindrical inner space of the body part; And a quantitative basket which is mounted in the body portion in a rotatable structure, and includes a chromophoric raw material chamber which is a space capable of accommodating a predetermined amount of chromic raw material through an opening formed at a position corresponding to the inlet or the outlet according to the rotation state. And a power source for imparting rotational force to the metering basket in the body portion.

In this case, the power source may be a brake motor that is easy to rotate, stop and reverse rotation of a certain angle.

At this time, the quantitative basket may be configured to further include a capacity adjusting means for changing the volume of the coloring material accommodating space of the coloring material chamber.

Further, the capacity adjusting means includes a plate surface having the same shape as the cross-sectional shape of the color developing raw material chamber in a cylindrical or polygonal color developing raw material chamber having a constant cross-section formed parallel to the longitudinal direction of the cylindrical metering basket. The blocking plate is configured, and one end is connected to the blocking plate, the other end is configured to include a control bar located outside the body portion, by operating the control unit from the outside of the body portion by moving the blocking plate It can be configured to adjust.

Further, the adjusting bar is formed in the form of a cylindrical bar, one end is connected to the block plate in a rotatable form, and a thread is formed on the outer surface to engage with a thread formed on the inner surface of the through part of the metering basket, the body It can be configured to enable the capacity adjustment of the color raw material by the movement of the blocking plate by rotating the adjustment knob formed on the other end located outside the part.

With the above configuration, the injection molding machine for injection molding machine according to the present invention has the following effects.

First, since the raw material supplied from the hopper can be accurately discharged in a predetermined amount, uniform and constant color of the injection molded product produced compared to the conventional screw method can be secured.

Second, it is easy to control emission changes and to manage emissions checks.

Third, since it can be made in a relatively simple structure, the cost burden is significantly less than in the case of applying expensive equipment, it is also easy to follow-up management related to repair in case of failure.

Hereinafter, the configuration of the above-described metering feeder for injection molding machine according to the present invention will be described in more detail with reference to the accompanying drawings in which preferred embodiments of the present invention are shown.

On the other hand, the same reference numerals for the components having the same, similar functions as in the prior art mentioned with reference to Figure 9, etc. will be described.

In addition, the configuration of the injection molding machine other than the fixed-quantity feeder, which is the core of the present invention, will be briefly described only as necessary, and the description of the contents already described or generally known will be omitted as much as possible so as not to obscure the subject matter of the present invention. .

1 is a view schematically showing the structure of an injection molding machine to which a metering feeder for an injection molding machine according to a preferred embodiment of the present invention may be applied.

Since the illustrated configuration has been described above, repeated descriptions will be omitted. In the case of a metering feeder for an injection molding machine according to a preferred embodiment of the present invention, it can be applied to the metering feeder 1 part for the coloring hopper of FIG. 1.

Figure 2 is a schematic diagram of an injection molding machine to more clearly show the path of the coloring hopper 100-quantitative feeder 1-mixing unit 150 to which the quantitative feeder 1 is applied according to a preferred embodiment of the present invention. As shown in FIG. 1, the structure of the quantitative feeder 1 in a more specific form is shown.

In the case of the coloring raw material filled in the coloring hopper 100, it is generally provided in the form of a solid chip, similar to a compound that is a molding raw material made of plastic.

The coloring raw material filled in the coloring hopper 100 is moved to the mixing unit 150 in the lower part of the drawing by a certain amount by the operation of the metering feeder 1, and this operation is directly driven by the metering feeder 1. It is performed by the brake motor 50 which is a power source for transmitting the.

In the mixing unit 150, the compound introduced in a predetermined amount from the main hopper 200 and the coloring material are mixed at a predetermined ratio, and the expression of a specific color is secured by maintaining this ratio precisely.

As schematically shown in FIG. 2, in the case of the metering feeder 1 according to the preferred embodiment of the present invention, the metering basket 20 is positioned inside the body 10, and the brake motor ( 50) is a structure for imparting rotational force to the metering basket (20).

In addition, in the case of the quantitative basket 20 having a space for filling a predetermined amount of the coloring material, it may be configured to further include a capacity adjusting means 30 that can adjust the amount of filling the coloring material.

This configuration will be described in more detail below with reference to FIGS. 3 to 8 in which the structure of the quantitative feeder 1 according to the preferred embodiment of the present invention is shown in detail.

3 to 4 are perspective views showing the structure of only the metering feeder according to a preferred embodiment of the present invention separately from the entire injection molding machine, and FIG. 3 is a view of the upper surface connected to the coloring hopper 100. 4 is a diagram illustrating a bottom surface connected to the mixing unit 150.

As shown, the fixed-quantity feeder according to the preferred embodiment of the present invention is located in the body portion 10, the brake motor 50 mounted on the outer surface of the body portion 10, the body portion 10 It comprises a control knob 31 and the like of the capacity adjusting means for adjusting the filling amount of the metering basket 20 (not shown), as shown in Figure 3 body portion 10 is connected to the coloring hopper 100 The top surface of the) is formed with an inlet (5) for receiving the coloring raw material from the coloring hopper (100).

On the other hand, as shown in Figure 4, on the bottom of the body portion 10, a discharge port 15 for discharging the color raw material is formed in the mixing portion 150, the inlet 5 in the body portion 10 ) And the outlet 15 has a structure in communication with each other via the internal space.

5 to 7 is a perspective view for explaining the structure and operation steps, etc. of the metering basket 20 located in the body portion 10, while the metering basket 20 and the configuration directly related thereto are shown in solid lines, while the body The external three-dimensional structure including the portion 10 is indicated by a dotted line.

The above-described body portion 10 has a cylindrical inner space that is in direct communication with the inlet 5 and the outlet 15 is formed, the cylindrical inner space has a cylindrical outer surface that has a conformal to rotate in the body portion A quantitative basket 20 of possible construction is mounted in the form as shown.

Therefore, the quantitative basket 20 is in a state rotatable about the longitudinal direction of the cylinder, and the chromophoric raw material chamber 26 which is a cylindrical space in which the chromophoric raw material 2 introduced through the inlet 5 can be accommodated separately. ) Is formed inside.

To this end, an opening 25 is formed at a position corresponding to the inlet 15 at a specific rotation angle to communicate with the coloring material chamber 26 of the metering basket 20 to the outside. Therefore, when the opening 25 is opened to a position upward in the drawing as shown in FIG. 5, the coloring raw material 2 introduced through the inlet 5 is directly filled into the coloring raw material chamber 26.

On the other hand, as shown in FIG. 6, in the state where the dosing basket 20 is rotated about 90 ° in the state of FIG. 5, the opening 25 is blocked by the inner wall of the cylindrical inner space of the body portion 10 to be substantially. It becomes a closed state and the coloring raw material 2 filled in the coloring raw material chamber 26 is maintained a charged state.

In the state in which the metering basket 20 is rotated 180 ° in the state of FIG. 5, as shown in FIG. 7, the metering basket 20 is disposed due to the outlet 15 located on the side opposite to the inlet 5 of the body 10. The opening 25 is in an open state, and therefore, the coloring raw material 2 filled in the coloring raw material chamber 26 is discharged toward the lower part, that is, the mixing part 15 in the drawing.

On the other hand, it is preferable that such a rotation operation of the metering basket 20 is made by a power source for imparting rotational force, but it is possible to apply a conventional motor as the power source, but stops after 180 ° rotation of the metering basket 20. In consideration of the process of reverse rotation, etc., it is preferable that the brake motor 50 be easily rotated, stopped, and reverse rotated at a predetermined angle.

Through such a process, a predetermined amount of the coloring raw material to fill the coloring raw material chamber 26 by one rotation quantitative basket 20 rotational operation is supplied to the mixing part, which generally corresponds to the amount required for one injection of a mold.

Unlike the screw method, the color raw material chamber 26 of the quantitative basket 20 has a predetermined volume that exactly corresponds to the amount of the color raw material discharged in one rotation, and thus does not require a separate measurement, experiment, etc. It is easy to find out the exact amount of the color developing raw material 2 filled in (26).

In addition, in order to appropriately change and adjust the amount of the coloring material 2 supplied to the mixing section 15, the quantity basket 20 includes a capacity adjusting means including an adjusting knob 31 or the like. It is preferable that it is comprised including 30 further.

8 is a perspective view of a quantitative basket 20 for more specifically showing the configuration and operation of the above-described capacity adjusting means 30.

As shown in FIG. 8, the quantitative basket 20 includes a color developing raw material chamber 26 having a cross section of a certain shape and size, such as a cylinder or a polygonal column, and the The blocking plate 35 including the plate surface having the same shape as the cross-sectional shape is located therein.

The blocking plate 35 is rotatably connected to one end of the adjustment bar 32 also shown in FIGS. 3 to 7, and thus, the position of the blocking plate 35 changes along with the translational movement in the longitudinal direction of the adjustment bar 32. In this case, the volume of the internal space in the color developing raw material chamber 26 having one wall to move the blocking plate 35 can be changed.

Furthermore, as shown in Figure 8, the adjustment bar 32 is formed in the form of a cylindrical bar, the outer surface is configured to form a thread, the thread formed on the inner surface of the through part of the metering basket 20 and When forming the interlocking structure, it is possible to easily and more precisely change the filling amount of the above-described principle by rotating the adjustment knob 31 located outside the body portion 10 shown in Figs. have.

As described above, the present invention has been described with reference to the preferred embodiments and drawings, but the present invention is not limited to the configuration and operation according to the illustrated and described embodiments. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 to 2 is a schematic view of an injection molding machine to which a fixed-quantity feeder for injection molding machine according to a preferred embodiment of the present invention can be applied,

3 to 4 is a perspective view of a metering feeder for injection molding machine according to a preferred embodiment of the present invention,

5 to 7 is a perspective perspective view for showing the operation of the metering feeder of FIGS.

8 is a perspective view of a quantitative basket that is a component of the quantitative feeder of FIGS.

9 is a view schematically showing the structure of a conventional screw type metering feeder.

1,1 ': feed meter 2: color development raw material

5: inlet 10: body part

15: outlet 20: metering basket

25: opening 26: color raw material chamber

30: capacity adjusting means 31: adjustment knob

32: control bar 35: blocking plate

50: brake motor 100: coloring hopper

150: mixing section 200: main hopper

350: screw

Claims

A component that is applied to an injection molding machine that performs plastic molding by molding a compound, which is a molding raw material including plastic, in a molten state in a device, in a molten state and injecting into a mold to harden the main hopper into which the compound is charged and filled. And a coloring hopper 100 mixed with a compound supplied through the main hopper 200 in the mixing unit 150 and filled with a coloring raw material used to express a specific color in an injection molded product. The metering feeder for an injection molding machine installed on the path of the coloring hopper 100 and the mixing unit 150 in order to quantitatively supply the coloring material filled in the coloring hopper 100 of the injection molding machine to the mixing unit 150. To

An inlet 5 through which the coloring raw material supplied from the coloring hopper 100 is input, and an outlet 15 positioned opposite the inlet 5 and discharging the coloring raw material, and the inlet 5 And a body part 10 having a cylindrical internal space communicating with the outlet 15.

By having a cylindrical outer surface conforming to the cylindrical inner space of the body portion 10 is mounted in a rotatable structure in the body portion 10, the inlet (5) or the outlet 15 according to the rotation state A quantitative basket 20 including a coloring raw material chamber 26 which is a space capable of accommodating a predetermined amount of coloring raw material through an opening 25 formed at a position corresponding to the printing material;

And a power source for imparting a rotational force to the metering basket (20) in the body (10).

2. A fixed quantity feeder for an injection molding machine according to claim 1, wherein the power source is a brake motor (50) which is easy to rotate, stop and reverse rotation at an angle.

The method according to claim 1 or 2, wherein the quantitative basket (20) is characterized in that it further comprises a capacity adjusting means (30) for changing the volume of the color development raw material receiving space of the color development raw material chamber (26). Metering feeder for injection molding machine.

The method of claim 3, wherein the capacity adjusting means 30,

It includes a plate surface having the same shape as the cross-sectional shape of the color developing raw material chamber 26 in the cylindrical or polygonal color developing raw material chamber 26 having a constant cross-section formed in parallel with the longitudinal direction of the cylindrical metering basket 20. Block plate 35 is configured to,

One end is connected to the blocking plate 35, the other end is configured to include an adjustment bar 32 located outside the body portion 10, by operating the control unit from the outside of the body portion 10 Characterized in that the feeder for injection molding machine, characterized in that configured to adjust the capacity of the color raw material by moving the blocking plate (35).

According to claim 4, wherein the adjustment bar 32 is formed in the form of a cylindrical bar, one end is connected to the blocking plate 35 in a rotatable form, the thread formed on the inner surface of the through portion of the metering basket (20) Screw thread engaging with the outer surface is formed, by adjusting the adjustment knob 31 formed on the other end located outside the body portion 10 to adjust the capacity of the color raw material by the movement of the blocking plate 35 A metered feeder for an injection molding machine, characterized in that configured to be possible.