KR101923159B1 - Material mixer for injection molding - Google Patents

Abstract

The present invention provides a mixer comprising at least two hoppers, a raw material feeder located at the lower end of each hopper, for supplying the raw material discharged from the hopper to the mixer main body, and a mixer main body for mixing the raw materials supplied by the raw material feeder The mixer main body includes a conical mixing rotating body rotating about a longitudinal axis. The raw material feeding device is formed in parallel with the side of the mixer main body, and the raw material discharged from the hopper A first guide having an inlet hole formed therein, a screw inserted along the first guide, for supplying a raw material supplied through the raw material inlet hole by rotation to the inside of the mixer main body, and a raw material supplied by the screw rotation, A second guide extending from the first guide to the inside of the mixer body, Provides an injection molding machine, it characterized in that the raw material mixer to.

Description

{MATERIAL MIXER FOR INJECTION MOLDING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material mixer for an injection molding machine, and more particularly, to a raw material mixer for an injection molding machine in which raw materials or pigments are mixed and supplied to an injection molding machine.

In general, an injection molding machine is used for molding a predetermined product with a material such as plastic. The injection molding machine can mold a predetermined product by melting and pressing a predetermined raw material provided by the raw material mixer.

At this time, when the injection molding machine manufactures the product, the raw material should be appropriately injected to obtain a good quality product. Especially, when it is necessary to add color to the product, it is necessary to supply a certain amount of color pigment according to the mixing ratio by the optimum design and mix it so that the color pigment can be mixed well. If the blending ratio of the supplied color pigment is irregular or the mixing efficiency is lowered, the color may not be uniform and the product may be defective.

Therefore, various attempts have been made to improve the efficiency of feeding and mixing of a predetermined amount of raw material to improve the above problems, such as Korean Patent Registration No. 0543095.

The present invention intends to provide a new type raw material mixer for an injection molding machine capable of uniformly mixing raw materials or pigments.

In order to solve the above-described problems, the present invention provides an apparatus for mixing a raw material, comprising: at least two hoppers; a raw material feeder located at a lower end of each of the hoppers to supply raw materials discharged from the hopper to a mixer main body; Wherein the mixer main body includes a conical mixing rotating body rotating around a longitudinal axis, the raw material feeding device being formed in parallel with the side of the mixer body, A first guide formed with a raw material inflow hole through which the raw material flows, a screw inserted along the first guide and provided to the inside of the mixer main body through rotation of the raw material inflow hole, In order to drop the raw material on the mixing rotary body, the first guide is inserted into the mixer main body And a second guide formed to be elongated.

According to one embodiment, the raw material injecting apparatus further includes a screw driving means for rotating the screw, and the raw material mixer for injection molding machine further comprises a control unit for controlling an operation of the screw driving means, The control unit may control the screw driving unit to rotate the screw by the number of revolutions of the screw corresponding to the amount of raw material to be supplied to the mixer main body.

According to an embodiment, the screw bundle including the screw and the screw driving means may be fastened to the first guide by a clamp so that the screw bundle can be inserted into and detached from the first guide.

According to one embodiment, the first guide may include an insertion stopper at one end thereof so that the screw bundle is not inserted over a predetermined length along the first guide.

According to one embodiment, the mixer body may further include at least one mixing blade formed on the outer surface of the mixing rotor.

According to one embodiment, the mixing vanes may be formed to have a wave shape along the busbars of the mixing rotator.

According to one embodiment, the first guide may further include a door that can be opened and closed at a lower surface.

The raw material mixer for an injection molding machine according to the present invention can uniformly mix the input raw material or pigment.

In addition, it is possible to easily and quickly clean the inside of the guide into which the screw or screw for dosing the raw material or the pigment is charged, and it is possible to facilitate the repair work for the screw bundle.

1 is a perspective view of a raw mixer for an injection molding machine according to an embodiment of the present invention.
Fig. 2 is a front view of the raw material mixer of Fig. 1; Fig.
3 is a left side view of the raw material mixer of FIG.
4 is a view illustrating a screw bundle according to an embodiment of the present invention.
5A is a view illustrating a mixer body according to an embodiment of the present invention.
FIGS. 6A and 6B are views illustrating examples of mixing wings according to an embodiment of the present invention.
7 is a bottom perspective view of a first guide coupled with a screw bundle according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms.

The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms "comprises" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1 is a perspective view of a raw mixer for an injection molding machine according to an embodiment of the present invention, FIG. 2 is a front view of the raw mixer of FIG. 1, and FIG. 3 is a left side view of the raw mixer of FIG.

1 to 3, a raw mixer 100 for an injection molding machine according to an embodiment of the present invention includes a mixer main body 110, at least two hoppers 120 and 130, raw material input devices 140 and 150 ).

However, it is needless to say that the components shown in Figs. 1 to 3 are not essential, so that a raw mixer for an injection molding machine having components having more or fewer components can be implemented.

Hereinafter, each component will be described.

Hoppers 120 and 130 (hoppers) are containers for temporarily storing raw materials or pigments of products manufactured through injection molding (or extrusion molding). Raw materials and pigments are put into the upper part of a hopper, .

The outer surface of the hoppers 120 and 130 may be in the form of a substantially funnel whose upper portion into which the raw material or pigment is injected is wider than that of the other upper portion. Such hoppers 120 and 130 are disposed around the mixer body 100 .

The number of the hoppers 120 and 130 disposed around the mixer main body 100 is not particularly limited but may be at least two to mix a plurality of raw materials and pigments, The hoppers 120 and 130 are preferably formed to have a generally arc-shaped cross-section to minimize interference between neighboring hoppers when disposed around the hopper 100.

At least one transparent window may be formed on one side of the hoppers 120 and 130 so that the user can visually confirm the amount and state of the raw materials or pigments in the hoppers 120 and 130.

The bottom of the hoppers 120 and 130 and the bottom of the hoppers 120 and 130 and the feed devices 140 and 150 (See Fig. 2) so that the diaphragms 121 and 131 can move in the horizontal direction.

That is, the opening / closing degree or opening / closing degree of the discharge port of the hoppers 120 and 130 can be controlled by the horizontal movement of the diaphragms 121 and 131.

The raw material input devices 140 and 150 are disposed at the lower ends of the respective hoppers 120 and 130 to feed raw materials or pigments discharged from the hoppers 120 and 130 to the mixer main body 110, It can be provided inside. The raw material input devices 140 and 150 may be arranged around the mixer main body 100 in a number corresponding to the number of the hoppers 120 and 130.

The raw material input devices 140 and 150 may include first and second guides 141 and 151, a screw 161 and a second guide 142 and 152 according to an embodiment.

The first guides 141 and 151 are formed parallel to the sides of the mixer body 110 and are formed so as to be close to the upper side of the mixer body 110, .

The first guides 141 and 151 are formed in the shape of a pipe having both ends penetrated and a raw material inflow hole (not shown) is formed on the upper side so that the raw material discharged from the hoppers 120 and 130 flows into the first guide. .

The screw 161 may be inserted along the longitudinal direction of the first guides 141 and 151 and the screw 161 inserted into the first guides 141 and 151 may be rotated It is possible to provide the raw material provided through the ball into the mixer main body 110.

Here, the specification of the screw 161 (outer diameter, pitch diameter, bore diameter, thread angle, pitch, angle, mountain floor, etc.) is not particularly limited, The amount of the raw material or pigment to be supplied to the mixer body 110 per rotation number of the screw 161 can be stored by user setting or the like.

The second guides 142 and 152 may be formed in a substantially pipe shape extending in the longitudinal direction from the first guides 141 and 151 and extended into the mixer body 110 (see FIG. 5). At this time, it is preferable that one end of the second guide 142 or 152 is extended to reach the upper part of the mixing rotating body bundle 111. If the mixing rotating body 111a has a conical shape, It is preferable that one end of each of the protrusions 142 and 152 extends to reach the vicinity of the vertex of the cone.

The raw material or pigment put into the mixer main body 100 by the rotation of the screw 161 can drop onto the mixing rotator 111a through the second guides 142 and 152. As described later, By the rotation of the rotating body 111a, raw materials or pigments falling from above do not collect at one point but scatter at a plurality of points, so that the raw material and pigment can be mixed evenly.

The mixer body 110 may include a conical mixing rotary body 111a or a mixing rotary body bundle 111 which is rotated around a vertical axis X. [

The raw material or pigment falling onto the mixing rotating body 111a is uniformly radiated around the rotating body by a repulsive force generated by collision with the surface of the rotating body to thereby feed the raw material or pigment supplied into the mixer body 110 uniformly .

The shape of the mixing rotating body 111a may vary, but it is preferable that the mixing cone 111a has a conical shape in order to mix the raw material or the pigment more evenly. As a result of various experiments in the cylindrical shape, spherical shape, and conical shape, the uniformity of raw material or pigment mixed with the spherical shape rather than the cylindrical shape and the conical shape rather than the spherical shape was high.

This is because the raw material or pigment falling on the surface of the rotating body is likely to move along the outer circumferential surface of the rotating body and the surface of contact with the raw material or pigment is wide and the centrifugal force acting on the raw material or pigment depends on the height of the rotating body, It is judged that the pigment is mixed evenly.

Here, the mixing rotating body bundle 111 may include a mixing rotating body 111a and at least one mixing blades 111b formed on the outer surface of the mixing rotating body 111a.

By providing the mixing blades 111b protruding from the outer surface of the mixing rotating body 111a, the uniformity of the blending material or the pigment can be further increased.

The shape of the mixing blade 111b is not particularly limited. As shown in FIG. 6 (a), a blade piece 111b formed in a longitudinal direction along a bus bar of a conical mixing rotating body 111a is formed along a circumference In another example, as shown in FIG. 6B, a plurality of blade pieces 111b may be formed along the circumference of the mixing bowl 111a so as to have a wave shape along the busbars of the conical mixing rotor 111a. Also, although not shown, one blade piece 111b formed along the busbars may include at least one disconnected portion, that is, a shape divided into at least two portions.

In another form of the mixing blade 111b, as shown in Fig. 6C, it may be formed in the shape of a projection rather than a wing shape to further increase the uniformity of the blend material or the pigment.

The mixed raw material or pigment is discharged to the outside of the mixer main body 110 through the funnel-shaped outflow portion 113 provided in the mixer main body 110, and is prepared to be provided to the injection molding machine.

The raw mixer 100 for an injection molding machine according to an embodiment of the present invention may further include a mixer driving unit 112 for rotating the mixing rotating body 111a about the longitudinal axis X .

The mixer driving means 112 may include an electric motor and at least one gear for rotating the mixing rotating body 111a. In the present invention, a motor for rotating the mixing rotating body 111a and a gear There is no particular limitation on the constitution or the bonding relationship therebetween.

In addition, the material dispensing apparatuses 140 and 150 according to an embodiment of the present invention may further include screw driving means for rotating the screw.

4, the screw driving means 162 may include an electric motor and at least one gear for rotating the screw 161. In the present invention, a motor for rotating the screw 161 And the configuration of the gears and the coupling relationship therebetween are not particularly limited.

Accordingly, the raw mixer for an injection molding machine according to an embodiment of the present invention further includes a control unit (not shown) capable of controlling the operation of the mixer driving unit 112 and / or the screw driving unit 162 .

According to an embodiment of the present invention, the control unit may control the operation of the mixer driving unit 112 to cause the mixing rotating body 111a to rotate.

At this time, it is preferable that the controller starts / stops the rotating operation of the mixing rotating body 111a based on a time point at which the screw 161 starts / stops the rotating operation by the at least one screw driving means 162. [ That is, the driving of the screw driving means 162 and the driving of the mixer driving means 112 are interlocked to start the driving of the mixing rotating body 111a at the time when the raw material or the pigment is put into the mixer main body 110, It is preferable that the driving of the mixing rotating body 111a is stopped at the point of time when the feed of the raw material or the pigment is stopped and the unnecessary driving of the mixer driving means 112 is prevented.

When the control unit drives the mixer driving means 112 to rotate the mixing rotating body 111, it may be controlled to rotate constantly at a predetermined rotational speed according to an embodiment, or as another example, The rotation speed of the rotating body 111 can be made to have a substantially normal distribution. That is, the control unit controls the mixer driving unit 112 (to be described later) so that the mixing rotating body 111 gradually increases the rotation speed to reach the maximum rotation speed as time passes after starting the driving, Can be controlled. Since the raw material or the pigment put on the mixing rotating body 111a by the material feeding devices 140 and 150 does not drop in a certain amount with time, the mixing rotating body 111a is moved in accordance with the drop amount of the raw material or pigment. By varying the rotation speed, it is preferable that the raw material or the pigment is not aggregated.

Meanwhile, according to one embodiment of the present invention, the control unit can rotate the screw 161 by controlling the operation of the screw driving unit 162. [

The control unit can control the screw driving unit 162 to rotate the screw 161 by the number of revolutions of the screw 161 corresponding to the amount of raw material or pigment to be put into the mixer body 110. [

As described above, the amount of the raw material or pigment to be supplied to the mixer main body 110 can be determined based on the specification of the screw 161, the number of rotations of the screw 161. When the input amount of the raw material or pigment is input from the user It is possible to control the screw 161 to rotate by the number of rotations of the screw 161 calculated on the basis of the input per unit revolution.

The raw material mixer according to an embodiment of the present invention may further include a mixed raw material amount measuring sensor (not shown) mounted inside the storage container 170 disposed under the mixer main body 110, The screw driving means 162 can be controlled using a signal output from the mixed raw material amount measuring sensor.

Specifically, when it is determined that the raw material mixed in the storage container is lowered by the value measured by the mixed raw material amount measuring sensor than the preset remaining amount water level, the control unit may select the raw material feeding device (140, 150) The control unit controls the operation of the screw driving unit 162 or the screw driving unit 162 in response to the operation of the screw driving unit 162 It is possible to control the operation so as to stop the introduction of the raw material or the pigment so that the mixed raw material in the storage container is maintained at a constant level.

Thus, the raw material mixture in the storage container 170 is always maintained at a constant level, so that the raw material mixer for the extractor according to the present invention can always supply the raw material stably with the injection molding machine.

4 is a view illustrating a screw bundle according to an embodiment of the present invention.

As shown in FIG. 4, the screw bundle 160 may include a screw 161 and a screw drive means 162 coupled thereto.

The outer surface of the first guides 141 and 151 and the outer surface of the screw bundle 160 are formed to be at least at least in the vicinity of the outer circumferential surface of the screw bundle 160 so that the screw 161 can be inserted into and detached from the first guides 141 and 151 It can be fastened by one, preferably two clamps (see Fig. 7).

3, the first guides 141 and 151 are inserted into the insertion stopper 143 at one end so that the screw bundle 160 is not inserted over the first guides 141 and 151 for a predetermined length or longer, .

That is, the screw 161 of the screw bundle 160 is inserted into the screw insertion hole 144 formed at one end of the substantially tubular first guide 141, 151, thereby forming the screw insertion hole 144 It is possible to prevent the screw bundle 160 from entering a predetermined depth or more.

At this time, the insertion stopper 143 is formed at a position inwardly extended from one end of the first guides 141 and 151 by a predetermined depth, and one end of the first guides 141 and 151 is provided with a screw bundle 160 It is preferable to form the seat portion 145 for supporting at least a part of the seat. Accordingly, the user can reduce the work fatigue when the screw bundle 160 is lifted by using the seat portion 145 when attaching and detaching the heavy screw bundle 160 to and from the first guides 141 and 151 have.

The screw bundle 160 including the screw 161 can be detached from the first guides 141 and 151 as a whole so that the repair work for the screw bundle 160 can be facilitated. 1 guides 141 and 151 can be cleaned easily and quickly.

The user can further easily clean the interior of the first guides 141 and 151 by allowing the user to open and close the residue outlet hole 147 on the bottom surface of the first guides 141 and 151, (See FIG. 7).

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention Should be interpreted.

100: raw material mixer 110: mixer main body
111: Mixing rotating body bundle 111a: Mixing rotating body
111b: mixing blade 112: mixer driving means
113: outlet portion 120, 130: hopper
121, 131: diaphragm 140, 150: material feeder
141, 151: first guide 142, 152: second guide
143: insertion stopper 144: screw insertion hole
145: seat part 146: door
147: Residue exiting hole 160: Screw bundle
161: screw 162: screw driving means
170: Storage container

Claims (7)

At least two hoppers;
A raw material charging device located at a lower end of each of the hoppers and supplying the raw material discharged from the hopper to the mixer main body; And
A mixer main body for mixing the raw materials supplied by the raw material feeding device;
, ≪ / RTI &
The mixer main body includes a conical mixing rotating body rotating about a vertical axis,
The raw material charging device comprises:
A tubular first guide formed parallel to a side of the mixer body and having a raw material inlet hole through which raw material discharged from the hopper located at an upper portion flows;
A screw inserted along the longitudinal direction of the first guide through the outer end of the first guide to provide the raw material supplied through the raw material inlet hole by rotation into the mixer main body, A screw bundle including a screw drive means;
A second guide extending from the first guide into the mixer body to drop the raw material provided by the screw rotation on the mixing rotator;
/ RTI >
Wherein the first guide has an insertion stopper configured to prevent insertion of the screw bundle into the screw bundle at a predetermined depth inward from the outer side along the first guide so that the screw bundle is not inserted over a predetermined length, And a seat portion for supporting the screw driving means inserted in the outer end portion of the first guide,
Wherein the screw driving means is located at an end portion of both ends of the screw that is not drawn into the mixer main body and is capable of separating the screw bundle from the first guide without detachment of the hopper and the first guide ,
The lower portion of the first guide may include a door having a tapered shape at both sides of the central portion so as to be convex along the longitudinal direction, and a door capable of opening and closing the residue outlet hole formed at the center portion. and,
Wherein the injection mixer further comprises a control unit for controlling operations of the screw driving unit and the mixing rotator, and the control unit controls the screw driving unit and the mixing rotator based on a time point at which the rotation of the screw is started / Wherein the control unit controls the mixing rotating body so that the rotating speed gradually increases with time after starting the driving. The method according to claim 1,
Wherein the control unit controls the screw driving unit to rotate the screw by the number of revolutions of the screw corresponding to the amount of raw material to be supplied to the mixer main body, So as to be different from each other. 3. The method of claim 2,
The screw bundle
Wherein the first guide is fastened to the first guide by a clamp so that the first guide can be inserted and removed. delete The method according to claim 1,
In the mixer main body,
At least one mixing blade formed on an outer surface of the mixing rotator;
Further comprising: an injection nozzle for injecting molten metal into the injection mixer. 6. The method of claim 5,
The mixing blade
Wherein the mixing rotor is formed to have a wave shape along the busbars of the mixing rotator. delete

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