KR200492293Y1 - Change core mounting unit - Google Patents

Abstract

The contents disclosed below relate to a change core mounting unit for locking and unlocking the change core in a mold.
A change core mounting unit according to an embodiment is a change core mounting unit for mounting a change core to a mold, wherein an outer cylinder body installed in the mold and having a through hole formed therein, and a hollow cylinder positioned inside the outer cylinder body An inner cylinder of the upper body, a fluid positioned between the outer cylinder and the inner cylinder and moving from a first position to a second position, a locking member that is locked or unlocked in the inner cylinder according to the movement of the fluid, and the change It may include a flange interposed between the core and the inner cylinder to couple the locking member to the change core.

Description

Change core mounting unit {CHANGE CORE MOUNTING UNIT}

The contents disclosed below relate to a change core mounting unit for locking and unlocking the change core in a mold.

In general, an injection mold is formed between a first mold, a second mold corresponding to the first mold, and the first and second molds, and is formed in the shape of an injection product to be manufactured. A cavity, the interior of the first or second mold It includes a change core that is detachably mounted on the cavity to change a part of the cavity so that various types of injection products can be manufactured, and an injection device that injects a molten resin into the cavity.

As related prior art, there is a mold structure disclosed in Korean Patent Publication No. 10-0182502 and a change core housing structure for a front panel manufacturing mold disclosed in Korean Utility Model Publication No. 2000-0006455.

The prior art has the advantage of being able to implement cavities of various shapes by attaching and detaching the change core to the mold. However, as the change core is fixed using a conventional fastening bolt of a general structure, there is a disadvantage in that it is inconvenient to replace the change core and takes a long time. In addition, there is a problem in that the defect rate of the molded product, which is the molded product, is increased due to the flow of the change core part when molding the injection product due to the weak bonding force between the mold and the change core part.

KR 10-0182502 B1 KR 2000-0006455 U

In order to solve the above-described problem, it is to provide a change core mounting unit that can easily replace the change core and significantly shorten the replacement time.

In addition, it is to provide a change core mounting unit capable of preventing the flow of the change core portion during injection molding by enhancing the bonding force between the mold and the change core portion.

The technical task to be achieved by the present embodiment is not limited to the above-mentioned tasks, and other tasks that are not mentioned will be clearly understood by those skilled in the art from the following description.

A change core mounting unit according to an embodiment is a change core mounting unit for mounting a change core to a mold, wherein an outer cylinder body installed in the mold and having a through hole formed therein, and a hollow cylinder positioned inside the outer cylinder body An inner cylinder of the upper body, a fluid positioned between the outer cylinder and the inner cylinder and moving from a first position to a second position, a locking member that is locked or unlocked in the inner cylinder according to the movement of the fluid, and the change It may include a flange interposed between the core and the inner cylinder to couple the locking member to the change core.

Here, the locking member may include a disk-shaped head portion formed on one side, and an insertion portion extending from the head portion and having an inner diameter smaller than the inner diameter of the head portion and inserted into the inner cylinder.

In addition, in the central portion of the flange, a locking member fixing hole may be formed including an insertion portion through hole through which the insertion portion passes, and a head portion seating groove into which the head portion is inserted and seated.

In addition, at a point symmetrical with respect to the center of the flange, at least two screw holes are formed so that a fastening screw can be inserted, and the flange, in a state in which the locking member is seated in the head mounting groove, the fastening It can be tightly coupled to the change core by screws.

In addition, the screw hole is made of four left and right, top and bottom based on the center of the flange, and may be composed of a screw through hole and a screw head groove.

Meanwhile, the inner cylinder may include a large-diameter portion protruding outwardly from the front end to be coupled to the housing, a middle-diameter portion formed at a predetermined distance from the housing, and a small-diameter portion coupled to the rear end of the housing.

Here, a ball bearing seating hole is formed on one side of the middle diameter portion of the inner cylinder so that the ball bearing is seated, a flat portion and a ball bearing release groove are formed on the inner surface of the fluid, and the ball bearing is inserted into the other side of the locking member. A locking groove may be formed to be able to be.

On the other hand, a hydraulic line is formed on one side of the outer cylinder in contact with the fluid so that hydraulic oil by a hydraulic pump flows in, and the fluid is moved from the first position to the second position by the hydraulic pressure of the hydraulic oil. do.

In addition, the fluid is connected to the inner cylinder by a coil spring surrounding the outside of the inner cylinder, and one side of the coil spring is inserted and fixed into a first spring fixing groove formed on one side of the inner cylinder, and the coil spring The other side of the fluid is characterized in that it is inserted and fixed in the second spring fixing groove formed on one side of the fluid.

According to the disclosed contents, there is an effect that the change core can be easily replaced and the replacement time can be drastically shortened.

In addition, there is an effect of improving the defect rate of the molded product by preventing the flow of the change core portion during injection molding.

The effects of the present embodiments are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a change core mounting unit according to an embodiment.
Figure 2 is an exploded perspective view of a change core mounting unit according to an embodiment.
3 is a cross-sectional view of a change core mounting unit according to an embodiment.
4 is a front ((a)) and rear ((b)) perspective view of the flange shown in FIGS. 1 to 3.
Figure 5 is a cross-sectional view showing the application state of the change core mounting unit according to an embodiment ((a) is a state in which the chase core is locked to the mold, (b) is a state in which the chase core is unlocked in the mold )

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the aircraft having a spray function according to a preferred embodiment. For reference, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a perspective view of a change core mounting unit according to an embodiment, FIG. 2 is an exploded perspective view of a change core mounting unit according to an embodiment, and FIG. 3 is a cross-sectional view of the change core mounting unit according to an embodiment, and FIG. 4 is a front ((a)) and rear ((b)) perspective view of the flange shown in FIGS. 1 to 4. For reference, the front end or the front to be described below refers to the left part in FIGS. 1 to 3 and 5, and the rear end or the back refers to the right part.

1 to 4, a change core mounting unit 100 according to an embodiment is a change core mounting unit 100 for mounting a change core 4 (refer to FIG. 4) to a mold 2, and includes a housing ( 110), an inner cylinder 120, a fluid 130 and a locking member 140, and a flange 160.

The housing 100 is installed in the mold 2 and a through hole is formed therein so that the inner cylinder 120 and the fluid 130 can be positioned. Here, the mold 2 may be a conventional lower mold or a main core of a mold installed in the lower mold.

The inner cylinder 120 has a hollow cylindrical shape and is located inside the housing 110 and its both ends are fixed to both ends of the housing 110.

To this end, the inner cylinder 120 has a large diameter portion 122 that is protruded outward from the front end and is coupled to the housing 110, a middle diameter portion 124 formed at a predetermined distance from the housing 110, and the housing 110 ) May be composed of a small diameter portion 126 coupled to the rear end side.

A first spring fixing groove 122a is formed on one side of the large diameter portion 122 to fix the coil spring 150 to be described later, and a ball bearing seating hole is formed on one side of the middle diameter portion 124 so that the ball bearing 146 is seated. (124a) is formed. Here, the ball bearing 146 is moved to the inside or outside of the inner cylinder 120 according to the movement of the fluid 130 to lock the locking member 140.

A screw tapped hole 126a is formed on the inside of the small diameter part 126, and a fixing bolt 170 for fixing the change core mounting unit 100 to the mold 2 is inserted into the screw tapped hole 126a. do.

The fluid 130 is formed in a hollow cylindrical shape and is located between the housing 110 and the inner cylinder 120, and is slid from the first position to the second position by an external force.

Here, the first position means a state in which the fluid 130 is positioned at a predetermined distance from the large diameter portion 122 of the inner cylinder body 120, and the second position is sliding and in contact with the large diameter portion 122. Means state.

Here, the external force may be implemented by various driving forces, but may preferably be implemented by the pressure of hydraulic oil by a hydraulic pump (not shown) to be described later.

A flat portion 132 and a ball bearing release groove 134 are formed on the inner surface of the fluid 130.

The flat portion 132 presses the ball bearing 146 seated in the ball bearing seating hole 124a in the inner direction of the inner cylinder 120 when the fluid 130 is in the first position, and the ball bearing 146 is locked again. The other side of the member 140 is pressed. At this time, the ball bearing 146 may be preferably inserted into the locking groove 146a of the locking member 140 to be described later.

The ball bearing release groove 134 serves to provide a space so that the ball bearing 146 seated in the ball bearing seating hole 124a is separated to the outside of the inner cylinder 120 when the fluid 130 is positioned in the second position. When the ball bearing 146 is inserted into the ball bearing release groove 134, the locking member 140 may be unlocked from the inner cylinder 120 by releasing the pressing force by the ball bearing 146.

In order to facilitate the locking function of the ball bearing 146, it is preferable that the front end side of the ball bearing release groove 134 is formed at a right angle and the rear end side is formed to be tapered.

Meanwhile, the fluid 130 is connected to the inner cylinder 120 by a coil spring 150 surrounding the outer side of the inner cylinder 120.

To this end, one side of the coil spring 150 is inserted and fixed in the first spring fixing groove 122a of the large diameter portion 122 formed on one side of the inner cylinder 120, and the other side of the coil spring 150 is a fluid 130 It is inserted and fixed in the second spring fixing groove 136 formed on one side of the fluid 130, preferably at the front end of the fluid 130.

The locking member 140 has a substantially cylindrical shape, and a disk-shaped head portion 142 formed on one side thereof, and extending from the head portion 142, has an inner diameter smaller than the inner diameter of the head portion 142, so that the inner cylinder body ( It consists of an insertion portion 144 that is interpolated to 120). At this time, a locking groove 144a may be formed at one side of the insertion part 144 so that the above-described ball bearing 146 may be inserted.

The flange 160 is interposed between the change core 4 and the inner cylinder 120 and serves to couple the locking member 140 to the change core 4.

The flange 160 is formed in a plate shape having a predetermined thickness, and a locking member fixing hole 162 is formed in the central portion thereof to fix the locking member 140. Here, the locking member fixing hole 162 is an insertion portion through hole 162b through which the insertion portion of the locking member 140 passes, and a head portion seating groove 162a into which the head portion 142 of the locking member 140 is inserted and seated. ) Can be configured. At this time, the insertion portion through hole (162b) and the head portion seating groove (162a) is formed in a shape corresponding to the insertion portion 144 and the head portion 142 of the locking member 140, respectively, of the head portion seating groove (162a) It is preferable that the diameter is made larger than the diameter of the insertion part through hole (162b).

The flange 160 and the change core 4 may be coupled by various structures, but it is preferable that the front surface of the flange, which is one side of the flange, is interviewed with the change core in order to maximize adhesion.

On the other hand, for the coupling of the flange 160 and the change core 4, at least two screw insertion holes 164 so that the fastening screw 166 can be inserted at a point symmetrical to each other with respect to the central portion of the flange 140 Is formed. Accordingly, the flange 160 may be closely coupled to the change core 4 by a fastening screw 166 in a state in which the locking member 140 is seated in the head mounting groove 162a.

The fastening screw 166 may be composed of a screw head 166a, a screw shaft portion 166b having a flat surface as a portion extending from the screw head 166a, and a threaded portion 166c having a thread formed thereon. Here, the threaded portion (166c) is screwed into the screw groove (4a) formed in the change core (4) through the screw insertion hole (164).

In addition, the screw insertion hole 164 is made of four left and right, up and down based on the central portion of the flange 160, and may be composed of a through hole (164b) and a screw head groove (164a). Here, the screw head 166a of the fastening screw 166 is seated in the screw head groove 164a, and the screw shaft 166b of the fastening screw 166 is inserted into the through hole 164b. Accordingly, the effective contact area between the flange 160 and the inner cylinder 120 is increased so that the flange 160 can be stably supported by the inner cylinder 120.

In the conventional case, the coupling force between the mold 2 and the change core 4 was weak, so that the change core 4 part flows during the molding of the injection product, thereby increasing the defect rate of the molded product, which is an injection product. In this case, since the change core 4 is closely coupled to the flange 160, it is possible to prevent the flow of the change core 4 portion during injection molding, and accordingly, there is an advantage that the defect rate of the molded product can be remarkably improved.

Meanwhile, a hydraulic line 112 may be formed on one side of the housing 110 in contact with the fluid 130 so that hydraulic oil by a hydraulic pump is introduced. When hydraulic oil flows through the hydraulic line 112, the fluid 130 may be moved from the first position to the second position by hydraulic pressure. Here, the hydraulic pump is preferably a pneumatic pump, and the hydraulic oil may be implemented with air.

On the other hand, the first sealing groove (122b) and the second sealing groove (122b) of the annular shape, respectively, so that the ring-shaped sealing member (s) is inserted and installed in the large diameter portion 122 of the inner cylinder body 120 and the outer surface of the fluid 130 138) can be formed. Here, the sealing member (s) serves to prevent the hydraulic oil introduced by the hydraulic line 112 from leaking to the outside by maintaining the airtightness between the housing 110 and the inner cylinder 120. Accordingly, the fluid The 130 may be smoothly slid from the first position to the second position.

Figure 5 is a cross-sectional view showing the application state of the change core mounting unit according to an embodiment, (a) is a state in which the chase core is locked in the mold, (b) is the state in which the chase core is unlocked in the mold Show.

Hereinafter, the replacement process of the change core 4 will be described in detail.

Referring to FIG. 5A, the fluid 130 is supported by the coil spring 150 and stays at the first position, and the ball bearing 148 of the inner cylinder 120 is a flat part of the fluid 130 ( It is moved inward by 122 and inserted into the locking groove 146a of the locking member 140, and accordingly, the locking member 140 is locked so as not to move left and right.

At this time, the head 142 side of the locking member 140 is constrained by the locking member fixing hole 162 formed in the flange 160, and the flange 160 and the change core 4 are closely coupled by a fastening screw 166. Therefore, the change core 4 remains mounted on the mold 2.

In the case of (b), a process in which the change core 4 is unlocked from the mold 2 is shown, and when hydraulic oil flows into the housing 110 through the hydraulic line 112 by the hydraulic pump, the fluid 130 Is moved from the first position to the second position by the hydraulic pressure of the hydraulic oil, and the coil spring 150 maintains the contracted state. At this time, the flat portion 132 of the fluid 130 is moved forward, and the ball bearing release groove 134 is located in a place corresponding to the ball bearing seating hole 124a of the inner cylinder 120.

Accordingly, the ball bearing 148 is separated from the ball bearing seating hole 124a and inserted into the ball bearing release groove 134 of the fluid 130, and the locking member 140 is unlocked from the inner cylinder 120 and the change core 4 Is separated from the mold (2).

Next, the user removes the existing change core 4 from the flange 160, attaches another type of change core 4, and then inserts the locking member 140 back into the inner cylinder 120 to change the core 4 ) To the mold (2).

Next, when the driving of the hydraulic pump is stopped, the restoring force of the coil spring 150 is operated as the hydraulic pressure is released, and the fluid 130 slides from the second position to the first position and becomes the state of (a) again. , The replacement work of the change core 4 is completed.

Conventional change core replacement work is performed by lowering the mold (2) and then re-mounting the change core (4) to the mold (2) by fastening bolts, so the work process is complicated and the replacement time is long. . However, according to the present embodiment, as the change core 4 is replaced by unlocking and locking the locking member 140, there is an advantage in that the working process can be simplified and the replacement time can be drastically shortened.

Although a preferred embodiment of the present invention has been described with reference to the accompanying drawings, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiment of the present invention and represent all the technical ideas of the present invention. Since it is not, it should be understood that there may be various equivalents and modifications that may be substituted for them at the time of application.

2: mold 4: change core
100: change core mounting unit 110: housing
112: hydraulic line 120: inner cylinder
122: Daekyung Department 124: Chongqing Department
124a: ball bearing seating hole 126: small diameter part
126a: thread tapped hole 130: fluid
132: flat portion 134: ball bearing escape groove
140: locking member 142: male thread
144: locking jaw 146: insertion portion
146a: locking groove 150: coil spring
160: flange 162: locking member fixing hole
164: thread insertion hole 166: fastening screw
170: fixing bolt

Claims (9)

In the change core mounting unit that mounts the change core to the mold,
An outer cylinder installed in the mold and having a through hole formed therein;
A hollow cylindrical inner cylinder positioned inside the outer cylinder and having both ends fixed to both ends of the outer cylinder;
A fluid positioned between the outer cylinder and the inner cylinder and sliding from a first position to a second position by an external force;
One side is coupled to the change core and the other side is inserted into the inner cylinder, the locking member locked or unlocked to the inner cylinder according to the movement of the fluid; And
A plate-shaped flange interposed between the change core and the inner cylinder and having a predetermined thickness for coupling the locking member to the change core; and
The locking member,
It consists of a disk-shaped head portion formed on one side, and an insertion portion extending from the head portion and having an inner diameter smaller than the inner diameter of the head portion and inserted into the inner cylinder
In the central part of the flange,
A locking member fixing hole composed of an insertion part through hole through which the insertion part passes, and a head part seating groove through which the head part is inserted and seated is formed,
At a point symmetrical with respect to the center of the flange, at least two screw insertion holes are formed so that the fastening screw can be inserted,
The flange, in a state in which the locking member is seated in the head seating groove, is intimately coupled to the change core by the fastening screw,
The fastening screw is composed of a screw head, a screw shaft portion having a flat surface as a portion extending from the screw head, and a screw thread portion having a screw thread,
The screw insertion hole is composed of four left and right, top and bottom based on the center of the flange, and consists of a screw through hole into which the screw shaft portion is inserted and a screw head groove into which the screw head is seated,
It is installed in the mold and further includes a housing having a through hole formed therein so that the inner cylinder and the fluid can be located,
The inner cylinder has a large diameter portion protruding outward from the front end to be coupled to the housing, a middle diameter portion formed at a predetermined distance from the housing and having a diameter smaller than that of the large diameter portion and in which a coil spring and a fluid are disposed, and the middle diameter It has a smaller diameter than the part and is composed of a small diameter part that is seated and coupled to the inner diameter of the rear end of the housing,
The head portion seating groove of the flange, having a larger diameter than the insertion portion through hole, characterized in that it has a block shape so that the head portion of the locking member can be fitted, the change core mounting unit.
delete The method of claim 1,
One side of the flange is characterized in that the interview with the change core, change core mounting unit.
delete delete delete The method of claim 1,
A ball bearing seating hole is formed on one side of the middle diameter portion of the inner cylinder so that the ball bearing is seated, and a flat portion and a ball bearing release groove are formed on the inner surface of the fluid,
A change core mounting unit, characterized in that a locking groove is formed on the other side of the locking member so that the ball bearing can be inserted.
The method of claim 1,
A hydraulic line is formed on one side of the outer cylinder in contact with the fluid so that hydraulic oil flows through the hydraulic pump,
The fluid is characterized in that it is moved from the first position to the second position by the hydraulic pressure of the hydraulic oil, change core mounting unit.
The method of claim 1,
The fluid is connected to the inner cylinder by a coil spring surrounding the outside of the inner cylinder,
One side of the coil spring is inserted and fixed in a first spring fixing groove formed on one side of the inner cylinder, and the other side of the coil spring is inserted and fixed in a second spring fixing groove formed on one side of the fluid. Core mounting unit.

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