JP3193664B2 - Material input method and apparatus for light alloy injection molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for charging a light alloy material into a light alloy injection molding machine.

[0002]

2. Description of the Related Art With regard to material input of light alloy chips such as magnesium chips in a conventional light alloy injection molding machine,
As shown in FIG. 4, the light alloy chips 36 stored in the material hopper 31 are weighed in a predetermined amount by the weighing feeder 32, and then are injected into the hopper 33 of the injection molding machine through the hopper inlet 34. Then, the light alloy chip 37 put into the hopper 33 falls over the entire surface opened to the screw 35 at the lower end of the hopper 33, and temporarily stays on the screw 35,
Thereafter, the grooves are sequentially filled into the grooves of the screw 35, and are transferred to the forming section by the rotation and forward movement of the screw 35.

[0003]

However, in the prior art as described above, the screw is bitten by an excessive amount of material remaining in the hopper of the injection molding machine or by an increase in friction in the cylinder. When the amount of the screw is too large, the load on the rotation of the screw increases, the rotation of the screw stops, and the machine stops. Such a situation occurs when molding a metal such as a light metal and rarely occurs in a resin molding, and is considered to be unique to metal molding.

[0004] Further, when a phenomenon occurs in which the molten material at the tip of the screw flows backward due to clogging of the nozzle tip or the like, the temperature of the vicinity of the lower portion of the hopper inlet rises due to the backflow of the molten material. Then, the chip surface of the material accumulated in the input port softens and sticks to each other to cause a bridge, thereby blocking the entire input port of the hopper. It took a great deal of time and effort to remove such a bridge.

In view of the above, the present invention has been made in view of the above-mentioned unresolved problems of the prior art, and has been made in view of the fact that in a light alloy injection molding machine, an excessive biting of a light alloy material of a screw is prevented, and an appropriate It is an object of the present invention to provide a material charging method and apparatus for a light alloy injection molding machine capable of charging and transferring an amount of a light alloy material.

[0006]

In order to achieve the above object, a method for charging a material in a light alloy injection molding machine according to the present invention is characterized in that a material charging port formed in a cylinder of the light alloy injection molding machine is formed by a partition plate. Vertically and in the direction perpendicular to the direction in which the screw transfers the light alloy material and in the front-rear direction, the lower end of the partition plate is set to the hole diameter of the cylinder.
As a corresponding arc, the lower end of the arc is attached to the screw.
And a light alloy material is injected into the screw from a rear input port where the material input port is divided.

[0007] Further, the material input method in the light alloy injection molding machine according to the present invention is characterized in that the material is inserted into a cylinder of the light alloy injection molding machine.
The machined material inlet is vertically and
Clew is perpendicular to the direction of transport of light alloy material
And the front and rear direction,
Light alloy material into the screw from the rear inlet
To detect the amount of light alloy material Todokotamari the segmented front turned mouth of said material inlet characterized thereby,
Then, it is preferable to control the input amount of the light alloy material based on the detection result of the amount of the light alloy material staying in the front input port of the material input port.

[0008] Materials dosing device light alloy injection molding machine of the present invention, the material-feeding device of light alloy injection molding machine to inject light alloy material into the screw of the injection molding machine, puncture the cylinder
The provided material input port is vertically divided by a partition plate, and the screw is divided in the direction perpendicular to the traveling direction of the light alloy material and in the front-rear direction, and the lower end of the partition plate
Part is an arc corresponding to the hole diameter of the cylinder,
Positioning the lower end portion so as to substantially contact with the screw, characterized in that the light alloy <br/> material from the segmented aft inlet of the material inlet was no such put into the screw.

Further, in the material input device of the light alloy injection molding machine of the present invention, the level sensor for detecting the amount of the light alloy material accumulated in the front input port of the material input port divided by the partition plate is provided at the front. It is preferable to dispose corresponding to the charging port, and it is preferable to further include a charging amount control device that controls the charging amount of the light alloy material based on the detection result of the amount of the stagnant material by the level sensor.

[0010] In the method and apparatus for charging a material into a light alloy injection molding machine according to the present invention, it is preferable that a partition plate is detachably attached to a material charging port.

[0011]

[Action] The material input port drilled in the cylinder of the light alloy injection molding machine is set vertically by the partition plate and the screw is
The light alloy material is divided in the direction perpendicular to the traveling direction and in the front-back direction, and the lower end of the partition plate is bored in the cylinder.
The lower end of the arc is formed as an arc corresponding to the diameter.
Positioned so that it almost touches the clew, and configured so that light alloy material is injected into the screw from the rear input port where the material input port is divided, so that it is input from the rear input port
Light alloy material being is housed filled in the groove of the screw,
Then, it is transferred forward by the rotation of the screw. At this time, the light alloy material is regulated so as not to be higher than the groove depth of the screw by the arc-shaped lower end of the partition plate which divides the material inlet into the front and rear. By transferring the light alloy material into the cylinder in this state, always
It can be transported normally with a sufficient amount, and excessive biting of the screw can be eliminated. This allows the screw
Excessive biting reduces the load on the screw rotation
When it grows up, the screw turns or the machine stops
The situation can be prevented beforehand and surely .

Further, a level sensor is arranged in a vertical direction at a front input port of the material input port divided by the partition plate so as to detect an amount of the light alloy material accumulated in the front input port. When the material level of the material biting portion increases, the control device controls the amount of light alloy material to be charged based on the detection result of the level sensor.

Further, since the partition plate for dividing the material input port is detachably attached, even if a bridge phenomenon occurs in the hopper or the material input port, the bridge can be easily and quickly removed by removing the partition plate. It is possible to do.

[0014]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view schematically showing a material charging device in a light alloy injection molding machine according to the present invention. FIG. 2 is a sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional view of the material charging port taken along line BB in FIG. 2.

In FIG. 1, a screw 2 incorporated in a cylinder 1 is disposed rotatably and movably in an axial direction, and forms a material of a light alloy chip such as a magnesium chip (hereinafter referred to as a material). A flight 6 to be fed into the machine body and a groove 7 are formed. A hopper mounting member 4 a integrally provided with a hopper 4 is mounted on a flange 3 of the cylinder 1 with a bolt 9.

The material inlet 8 is connected to the hopper mounting member 4.
The screw 2 transfers the material into a material inlet 8 formed in the flange 3 and the cylinder 1 through a hole of the same diameter formed coaxially with the flange 3 and the cylinder 1 from a. A partition plate 5 is provided in a direction perpendicular to the traveling direction and in the front-rear direction so as to divide the material input port 8 back and forth, and the partition plate 5 has an upper end as shown in FIG. The projection-shaped partition plate fixing flanges 18 provided on both sides of the flange 3 are fixed by being detachably fitted into insertion grooves 19 formed in the flange 3. Thus, the material input port 8 is formed by the partition plate 5.
As shown in FIG. 1 and FIG. 3, it is divided into a front input port 8a and a rear input port 8b. As shown in FIG. 2, the lower end of the partition plate 5 is formed in an arc shape corresponding to the hole diameter of the cylinder 1, and is positioned so as to substantially abut the flight 6 of the screw 2. Regulates the amount of material 13 transferred. That is, it acts to regulate the material level 20 so that the material is not higher than the groove depth of the screw. Above the partition plate 5, there is provided a hopper inner partition plate 17 for dividing the inside of the hopper 4 in the same manner as the partition plate 5, and the lower end of the hopper inner partition plate 17 is located at the upper end of the partition plate 5. It is attached to the side wall of the hopper 4 so as to abut.

The material measuring feeder 12 is installed above the hopper 4 and has a rotor 14 driven by a motor 15 inside. The rotor 1 is driven by the motor 15.
By rotating the hopper 4, a predetermined amount of the material 13 is supplied through the hopper input port 16 to the hopper internal partition plate 1 of the hopper 4.
The material is fed into the rear portion divided by 7, and the charged material falls into the rear charging port 8 b of the material charging port 8 divided by the partition plate 5. The flow of the material in the hopper 4 is shown by arrows in FIG.

Material inlet 8 divided by partition plate 5
A level meter 27 is installed in the rear input port 8b of the vehicle, and the level meter 27 has a plurality of level sensing units 2 having different heights.
8, 29, and 30, and is configured to sense the amount of material that is charged and accumulated in the rear portion of the hopper 4 and the rear charging port 8b, that is, the height thereof.

The level sensor 10 attached to the front part of the partition plate 17 in the hopper is adapted to move in the direction of the screw 2 appearing at the opening of the front input port 8a of the material input port 8 divided by the partition plate 5, that is, in the vertical direction. Turned,
The material level 20 at the opening is configured to be sensed.

Feeding amount control device 1 for controlling the feeding amount of material
1 receives data such as the measuring stroke, screw rotation speed, and back pressure of the molding machine from the molding machine main body via the communication line 26, and calculates the rotation speed of the motor 15 and the required driving time based on these data. And the input amount control device 11
Is configured to drive the motor 15 to rotate the rotor 14 on the basis of the calculation result, and to feed a predetermined amount of the material 13 into the hopper 4 and the rear charging port 8b of the material charging port 8, Furthermore, it is connected so as to receive the detection results from the level sensor 10 and the level meter 27 provided in the front input port 8a and the rear input port 8b, respectively.

Next, the operation of the present invention configured as described above will be described.
Measuring stroke of the molding machine sent from the molding machine body,
The number of rotations of the motor 15 and required driving time are calculated based on data such as the screw rotation speed and the back pressure, and the motor 15 is driven to rotate the rotor 14 based on the calculation result, and a predetermined amount of the material 13 is removed. It is thrown into the hopper 4 through the hopper inlet 16. The input material 13 falls to the rear input port 8b of the material input port 8 divided by the hopper internal partitioning plate 17 and the partition plate 5, and then the rear input port 8b.
And is charged into the groove 7 of the screw 2 facing the. At this time, the screw 2 is rotating in a state where the screw 2 is located at the retreat position, and the material 13 is fed in the groove 7 of the screw 2 to the front of the cylinder 1 by the rotational propulsion of the flight 6. The amount of the material 13 to be sent forward through the groove 7 from the rear inlet 8 b is regulated by the lower end of the partition plate 5, and the material 13 has a material level 20 as high as the flight 6. You . Such state of the material 13 is never too embedding is screw 2 be fed into shea cylinder 1, is made as transfer of normal material.

When the material 13 is clogged in the cylinder 1 for some reason, the material 13 cannot be transferred. However, the material 13 is supplied from the rotor 14 of the material measuring feeder 12. Material 13 that has accumulated in the rear inlet 8b
Is transferred by the rotation of the screw 2 and starts to accumulate in the front inlet 8a. The level sensor 10 senses the height level of the material 13 that has begun to accumulate in the front input port 8a,
The sensing result is transmitted to the input amount control device 11. By comparing this sensing result with a preset limit value, the input amount control device 11 instructs the motor 15 to decrease the rotation speed of the motor 15 or to temporarily stop the motor 15. As a result, excessive material input can be prevented.

The level meter 27 has a plurality of level sensing units 28, 29, which have different sensing positions in order to prevent the material from accumulating in the rear inlet 8b due to an abnormal situation.
30 is provided to send a height signal sensed by the level sensing units 28, 29, 30 to the input amount control device 11, and the motor 15 of the material weighing feeder 12 is controlled according to the amount of accumulated material. To control the amount of material input.

When the temperature near the material inlet of the hopper rises due to the backflow of the molten material caused by clogging of the nozzle tip or the like, the chip surface of the material in the material inlet softens, and a bridging phenomenon occurs, causing a bridge phenomenon. Although the material input port will be blocked, in the present invention, by removing the detachably attached partition plate, a work space can be provided in the hopper and the material input port, and the removal work of the bridge can be performed. It can be done easily and quickly.

[0026]

According to the present invention, which is configured as described above, the partition of the drilled material inlet to the cylinder, for regulating the amount fed of light alloy material with dividing the material inlet in the longitudinal by providing a plate, projecting from the rear inlet
If the entered light alloy material is higher than the screw groove depth
Always keep the proper feed amount in a regulated state.
What is transferred to the front, Ru it is possible to eliminate the excess biting material of the screw. Due to this, excessive screw
Biting increases the load on screw rotation
The metal that the screw turns and the machine stops
A situation peculiar to molding can be prevented beforehand and surely . Further, by providing a level sensor for sensing the height level of the light alloy material that accumulates in the front input port divided by the partition plate, and by controlling the input amount of the light alloy material based on the sensing result. In addition, it is possible to reliably prevent the machine from being stopped due to excessive biting of the screw material or high load.

When the temperature of the material near the material inlet of the hopper rises due to the backflow of the molten material due to clogging of the nozzle tip or the like, the chip surface of the material in the material inlet softens and the chips adhere to each other, causing a bridge phenomenon. In the conventional apparatus, a great deal of time and effort was required to remove the bridge.However, in the apparatus of the present invention, the space in the hopper and the material inlet was removed by removing the partition plate. The removal of the bridge can be performed easily and quickly.

[Brief description of the drawings]

FIG. 1 is a schematic diagram schematically showing a material charging device in a light alloy injection molding machine of the present invention.

FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 of the material charging device in the light alloy injection molding machine of the present invention.

FIG. 3 is a cross-sectional view of the material charging port of the light alloy injection molding machine according to the present invention, taken along line BB in FIG. 2;

FIG. 4 is a schematic view of a material input device in a conventional light alloy injection molding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Screw 4 Hopper 4a Hopper mounting member 5 Partition plate 6 Flight 7 Groove 8 Material input port 8a Front input port 8b Rear input port 10 Level sensor 11 Input control device 12 Material measuring feeder 13 Material (light alloy) 17 In hopper Divider 27 level meter

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B22D 17/30 B29C 31/04 B29C 45/18

Claims (8)

(57) [Claims] 1. A light alloy injection molding machine having a cylinder
The material inlet is divided vertically by a partition plate and in a direction perpendicular to the traveling direction of the light alloy material by the screw and in the front-rear direction, and the lower end of the partition plate is syringed.
As the arc shape corresponding to the hole diameter of the die, the lower end of the arc shape is
Material input method in light alloy injection molding machine, characterized in that said positioned to substantially contact the screw, fed through a segmented aft inlet of the material inlet of the light alloy material into the screw. 2. A light alloy injection molding machine having a cylinder
The material input port vertically and screen
Direction perpendicular to the direction of travel of the light alloy material
And in the front-rear direction, the material inlet is divided
Inject the light alloy material into the screw from the rear inlet
Material input method in and the material to detect the amount of light alloy material Todokotamari the segmented front turned mouth inlet you wherein light coupling <br/> alloy injection molding machine also. 3. A process according to claim, characterized in that to control the input of light alloy <br/> material based on the amount of the detection result of the light alloy material Todokotamari forwardly turned mouth, which is divided by a partition plate 2 Material input method in the light alloy injection molding machine described in the above. 4. The method according to claim 1, wherein the partition plate is detachably attached to the material inlet. 5. A material supply apparatus of light alloy injection molding machine to inject light alloy material into the screw of the injection molding machine, sheet
A material input port formed in the cylinder is divided vertically by a partition plate and in a direction perpendicular to a traveling direction in which the screw transfers the light alloy material and in a front-rear direction, and a lower end of the partition plate is formed by a cylinder. Arc shape corresponding to the hole diameter
The lower end portion of the arc shape is positioned so as to substantially contact the screw, and the light alloy material is supplied to the screw from the rear input port divided from the material input port. Material injection device for alloy injection molding machines. 6. A level sensor for detecting an amount of light alloy material staying in a front input port of a material input port divided by a partition plate is arranged corresponding to the front input port. A material input device for a light alloy injection molding machine according to claim 5. 7. The light alloy injection molding machine according to claim 6, further comprising an input amount control device for controlling an input amount of the light alloy material based on a detection result of the amount of the stagnant material by the level sensor. material dosing device. 8. The material charging device for a light alloy injection molding machine according to claim 5, wherein the partition plate is detachably attached to the material charging port.