KR20090084269A

KR20090084269A - Mold assembly and method for changing a forming core

Info

Publication number: KR20090084269A
Application number: KR1020080010332A
Authority: KR
Inventors: 장명안
Original assignee: 한국단자공업 주식회사
Priority date: 2008-01-31
Filing date: 2008-01-31
Publication date: 2009-08-05

Abstract

A mold assembly and a method for changing a mold core are provided to allow the core body to be shared by exchanging the mold core separately. A mold assembly comprises a first template(23), a second template(55), a mold core(30), and a fixing pin(40). The first template is fixed to a fixed plate(20) of a molding machine, and has a first main core(27) corresponding to the external shape of product. The second template is installed on a movable plate(50), and has a second main core(57) forming the product shape together with the first main core. The mold core penetrates the inside of the first template and the first main core and shapes a part of the product. The fixing pin has an inclined pressing part(42) on the leading end, and is inserted to one side of the mold core to fix the position. The fixing pin is also inserted into the first template to press the end of the mold core in the direction separating the mold core.

Description

Mold assembly and method for changing a forming core

The present invention relates to a mold assembly, and more particularly, to a mold assembly configured to variously change a part shape of a product.

1 is a cross-sectional view of a configuration of a mold assembly according to the prior art.

According to this, the stationary side plate 1 is provided on the stationary side of the molding machine, and the first side plate 2 is provided on the stationary side plate 1. In addition, the first main plate 2 is provided with a first main core 3, and the first main core 3 cooperates with the second main core 9 to be described later to correspond to the shape of the product M. It makes a space to be. The first main core 3 is provided with a shape core 3 'for forming a partial shape of the product M.

A movable side plate 4 is provided on the movable side of the molding machine. The movable side plate 4 is moved relative to the fixed side plate 1 by a driving source. A spacer block 6 is installed on the fixed side plate 1, and a tight plate 5 is provided in a space corresponding to the spacer block 6. The wheat plate (5) serves to push up the pin (E) in the direction of the product (M) while moving by a separate drive source.

The spacer block 6 is provided with a support plate 7, and the support plate 7 is provided with a second mold plate 8. The second mold plate 8 is in close contact with the first mold plate 2, and a second main core 9 corresponding to the first main core 3 is installed therein.

However, the prior art as described above has the following problems.

The shape core 3 ′ is seated on the first main core 3, and more precisely, portions protruding to both sides of the shape core 3 ′ hang inside the first main core 3. Since the fixed side plate 1 and the first mold plate 2 need to be disassembled in order to separate the shape core 3 ', the replacement work of the shape core 3' has been troublesome.

In addition, there is a problem that the cost increases because the shape core (3 ') must be replaced as a whole when trying to form a different shape in the product.

Accordingly, an object of the present invention is to solve the problems described above, and to provide a mold assembly configured to replace a shape core without disassembling the fixed side plate and the first mold plate.

Another object of the present invention is to share a part of the shape core.

Another object of the present invention is to simplify the replacement process of the shape core.

According to a feature of the present invention for achieving the object as described above, the present invention is fixed to the fixed side plate of the molding machine, the first mold having a first main core having a shape corresponding to the appearance of the product and ; A second mold plate provided on the movable side plate of the molding machine and having a second main core selectively contacting the first mold plate and cooperating with the first main core to form an appearance of the product; A shape core installed through the inside of the first template and the first main core, and configured to shape a part of an appearance of the product; The first plate is penetrated in a direction orthogonal to the shape core, and the pressing portion is formed to be inclined at the tip thereof, and is inserted into one side of the shape core to fix the position of the shape core, and into the first plate. And a fixing pin inserted and pressing an end of the shape core in a direction in which the shape core is separated.

The outer surface of the shape core is formed so that the fixing groove is recessed to be inclined downward in the direction in which the fixing pin is inserted, the position of the shape core is fixed by inserting the pressing portion of the fixing pin in the fixing groove. .

A guide part is formed on the rear end of the shape core so as to be inclined upward in the direction in which the fixing pin is inserted, and the pressing part of the fixing pin is inserted into the first plate to press the guide part so that the shape core protrudes from the first main core. It is characterized by.

The shape core is installed in a seating hole and a through hole penetrating the first plate and the first main core, respectively, and the fixing groove of the shape core is located inside the pin hole formed in the first plate for insertion of the fixing pin. The shortest distance from the fixing groove to the guide portion is smaller than the inner diameter of the pinhole.

The shape core is characterized in that it comprises a core body in which the fixing groove is formed on one side, and a shape head that is selectively fastened to the tip of the core body to form a part of the cavity.

A fastening boss is formed to protrude from the front end of the core body, a fastening groove into which the fastening boss is inserted is formed in the shape head, and a fastening pin penetrates through the fastening pin while the fastening boss is inserted into the fastening groove. And fastening the shape head.

According to another feature of the present invention, the first and second mold plates which are installed to face each other and move relative to each other, the fixing pin is inserted into the pin hole formed in the first mold plate and the pressing portion is inclined at the front end, and the pin hole In the mold assembly comprising a shape core which is provided orthogonally and is formed with a core body and a shape head selectively fastened to the front end of the core body is formed so that the fixing groove is inserted into a predetermined depth so that the fixing pin is inserted on one side, A first step of moving the fixing pin inserted in the fixing groove in a direction to be separated from the fixing groove; A second step of rotating the fixing pin so that the pressing part faces the second template; A third step of advancing a fixing pin toward the shape core so that the pressing portion presses the rear end of the shape core to protrude the shape core toward the second mold plate; And a fourth step of replacing the shape head with another one in the protruding shape core.

After moving the fixing pin in the direction of removal from the pinhole, the shape core with the shape head replaced is reinserted into the first mold plate, and the fixing pin is rotated so that the pressing portion faces the second mold plate in the opposite direction. And a fifth step of fixing the shape core by inserting it into the fixing groove of the shape core.

In the present invention, a fixing pin is inserted into one side of the shape core to fix the position of the shape core, and the fixing pin which fixes the shape core is retracted to release the fixing. Pressing the rear end of the shape core can easily exit the seating hole and through hole. Therefore, the shape core can be separated without disassembling the fixed side plate, the first mold plate, and the first main core, so that the shape cores can be easily replaced and the work maneuver is reduced.

In the present invention, the shape core is composed of a core body and a shape head that is selectively fastened to the tip of the core body, so that when changing the shape of a part of the product, only the shape head needs to be replaced with another. Therefore, there is an effect that the core body is common to reduce the cost.

Hereinafter, a preferred embodiment of the mold assembly according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view showing a configuration of a preferred embodiment of the mold assembly according to the present invention, Figure 3 is an exploded cross-sectional view of a shape core which is a part of the embodiment of the present invention, Figure 4 is a partial configuration of the embodiment of the present invention The phosphorus pin is shown in side view.

As shown in these figures, the stationary side plate 20 is provided on the stationary side of the mold assembly. An insertion hole 21 is formed through one side of the fixed side plate 20. The insertion hole 21 is a portion formed to push the separation tool in case the shape core 30 which will be described later is not separated from the first plate 23.

The fixed side plate 20 is provided with a first mold plate 23. The first mold 23 is in close contact with the second mold 55 to be described later. A mounting hole 24 is formed through the inside of the first mold 23. More precisely, the seating hole 24 is formed at a position in communication with the insertion hole 21.

A pinhole 25 is formed through a portion of the first mold 23. More precisely, the pin hole 25 is formed to be orthogonal to the seating hole 24, and the first plate 23 starts at the outer surface of the first plate 23 and extends past the seating hole 24. It is formed through the inside. The pin hole 25 is inserted into the fixing pin 40 to be described later.

On the other hand, the first mold 23 is provided with a first main core (27). The first main core 27 is formed to have a shape corresponding to a part of the shape of the product M. The cavity is a space for forming the product M in cooperation with the second main core 57 to be described below. To form.

The through hole 28 also penetrates the first main core 27. In addition, the through hole 28 communicates with the seating hole 24.

The shape core 30 is inserted into the seating hole 24 and the through hole 28. The shape core 30 serves to form a partial shape of the product (M). For example, the shape core 30 is configured to form letters such as a model name or a company name on the outer surface of the product (M).

2 and 3, the shape core 30 is composed of a substantially rod-shaped core body 31, and the shape head 36 is selectively fastened to the tip of the core body (31).

One side of the outer surface of the core body 31 is formed so that the fixing groove 32 is recessed. The fixing groove 32 is a portion where the tip of the fixing pin 40 to be described later is inserted and seated. The fixing groove 32 is located inside the pinhole 25 formed in the first mold 23 for the insertion of the fixing pin 40.

The fixing groove 32 has a shape corresponding to the tip shape of the fixing pin 40. An inclined portion 32 ′ which is inclined downward in the insertion direction of the fixing pin 40 is formed on an inner surface of the fixing groove 32. In this case, the inclined portion 32 ′ may have the same slope as the pressing portion 42 of the fixing pin 40 to be described later. This is because the clamping force is increased when the pressing portion 42 is in close contact with the pressing portion 42 over a large area.

A guide part 33 is formed at the rear end of the core body 31. The guide part 33 is formed to be inclined in a direction opposite to the inclined part 32 '. That is, the guide portion 33 is formed to be inclined upward in the insertion direction of the fixing pin 40. At this time, the length from the inner surface of the pinhole 25 toward the second mold plate 55, which will be described later, to the end of the guide portion 33 becomes longer from t to w (t <w). The length t is smaller than the inner diameter H of the pinhole 25 so that a predetermined gap is generated between the inner surface of the pinhole 25 and the guide part 33. This is to allow the tip of the pressing portion 42 to be described later to be inserted between the inner surface of the pinhole 25 and the guide portion 33.

The pressing part 42 formed at the tip of the fixing pin 40 is applied to the guide part 33. At this time, the core body 31 is applied to the core body 31 by the guide part 33. A force is applied in the direction of exiting the seating hole 24. In other words, the pressing part 42 of the fixing pin 40 presses the guide part 33 so that the core body 31 passes through the seating hole 24 toward the second mold plate 55 to be described later. The hole 28 can be easily exited.

A fastening boss 34 protrudes from the front end of the core body 31, and a fastening hole 35 is formed by penetrating the fastening boss 34 from side to side. The fastening boss 34 is inserted into the boss seat portion 37 of the shape head 36 to be described later.

The shape head 36 forms a part of the cavity to form a part of the product M. Although not shown, the tip of the shape head 36 is formed in a shape corresponding to a portion of the product (M). The shape head 36 may be replaced according to the shape required. To this end, a boss seating portion 37 into which the fastening boss 34 is inserted is formed in the shape head 36. A fastening hole 38 is formed through the left and right of the shape head 36. The fixing pin 39 is inserted into the fastening holes 35 and 38 in a state where the fastening boss 34 of the core body 31 is inserted into the boss seating portion 37 of the shape head 36. The head 36 and the core body 31 are fastened.

The fixing pin 40 is inserted into the pin hole 25 of the first mold plate 23. The fixing pin 40 serves to fix the shape core 30. In addition, the fixing pin 40 also serves to push the shape core 30 to escape from the seating hole 24 of the first main core 27.

To this end, the pressing portion 42 is inclined at the tip of the fixing pin 40 so as to be inserted into the fixing groove 32 or to press the guide portion 33. Since the pressing part 42 is formed to be inclined, the gap between the guide part 33 and the inner surface of the pinhole 25 and the opening of the fixing groove 32 may be located in the pinhole 25. . In addition, since the pressing part 42 is formed to be inclined, the diameters of the pinhole 25 and the fixing pin 40 may be reduced.

A stopper 43 having a larger diameter than the fixing pin 40 is formed at the rear end of the fixing pin 40. The stopper 43 supports the outer surface of the first mold plate 23 when the fixing pin 40 is completely inserted into the pinhole 25 to prevent the fixing pin 40 from being inserted anymore. Do it. And at the rear end of the stopper 43 and the fixing pin 40, a fastening hole 44 (see Fig. 4) to which the first screw SW1 is fastened is formed.

The fixing pin 40 is fixed to the outer surface of the first mold 23 by a fastening block 45 in a predetermined length. The fastening block 45 is formed in an approximately 'L' shape. In addition, the fastening block 45 extends perpendicularly from one side of the fastening portion 45a and the fastening portion 45a fastened to the first mold plate 23 by a first screw SW1, so that the first mold plate ( 23 is composed of a fixing pin connecting portion (45b) having a predetermined interval with the outer surface. On the inner surface of the fixing pin connecting portion 45b the second screw (SW2) is fastened in the state that the outer surface of the stopper 43 of the fixing pin 40 is in close contact with the fixing pin 40 is the fastening block 45 Is coupled to.

On the other hand, the movable side plate 50 is provided on the movable side of the mold assembly. The movable side plate 50 is installed at a position corresponding to the other side of the fixed side plate 20 to move relative to the fixed side plate 20 by a separate driving source. A spacer block 53 is installed on the movable side plate 50, and a space S is formed by the spacer block 53.

The space plate 51 is provided in the space S. The upper plate 51 is formed by laminating an upper and lower plates. The pin 51 (not shown) is connected to push the one side of the product (M). One end of the mill pin is fixed to the mill plate 51, and the other end of the mill pin supports one side of the product (M).

The spacer block 53 is provided with a second template 55. The second plate 55 corresponds to the first plate 23 and forms the product M while being in close contact with the first plate 23. The second main core 57 is provided inside the second template 55. The second main core 57 serves to form a space corresponding to the appearance of the product M together with the first main core 27.

Hereinafter, the operation of the mold assembly according to the present invention having the configuration as described above in detail.

5 to 7 illustrate a process of separating the shape core in the embodiment of the present invention.

First, the assembling process of the mold assembly will be described with reference to FIG. 2. The shape core 30 is inserted into the mounting hole 24 of the first mold plate 23 and the through hole 28 of the first main core 27. At this time, the tip of the shape core 30 forms a part of the cavity. In order to fix the position of the shape core 30, the pressing portion 42 of the fixing pin 40 is inserted into the fixing groove 32 of the shape core 30.

In this state, the first and second mold plates 23 and 55 are in close contact with each other. The molten resin flows into the cavity formed by the first main core 27, the second main core 57, and the shape core 30. When the resin is solidified, the product (M) shape is completed.

In the exemplary embodiment of the present invention, a part of the product M may be changed by replacing the shape core 30. To this end, the shape core 30 should be separated from the first plate 23. First, as shown in FIG. 5, the product M is taken out in a state in which the movable side plate 50 moves away from the fixed side plate 20.

Then, the fastening of the second screw SW2 is released from the fixing pin connecting part 45b of the fastening block 45. At this time, the fastening part 45a of the fastening block 45 is still maintained in the fastened state to the first mold plate 23 by the first screw (SW1). In this state, the first screw SW1 is slightly released to rotate the fastening block 45 with respect to the first plate 23 about the first screw SW1, and the fixing pin 40 may be rotated. The stopper 43 is exposed. That is, the stopper 43 and the fixing pin connecting portion 45b of the fixing pin 40 do not cause interference.

Then, the pressing portion 42 of the fixing pin 40 moves the fixing pin 40 so as to exit the fixing groove 32 (arrow direction in FIG. 5). In this state, as shown in FIG. 6, the fixing pin 40 is rotated in the pinhole 25 so that the pressing part 42 faces the fixing side plate 20. Then, the fixing pin 40 is inserted into the pinhole 25 again. At this time, the tip of the pressing part 42 is inserted into a gap formed between the guide part 33 and the inner surface of the pinhole 25.

In this state, as shown in FIG. 7, when the fixing pin 40 is completely inserted into the pinhole 25, the pressing part 42 of the fixing pin 40 is guide part 33 of the shape core 30. Press to release the shape core 30 from the seating hole (24). At this time, the stopper 43 of the fixing pin 40 is supported on the outer surface of the first mold plate 23 so that the fixing pin 40 is no longer inserted into the pinhole 25.

The shape core 30 separated as described above is in a state in which the shape head 36 is fastened to the front end of the core body 31. In this case, instead of replacing the entire shape core 30 to change a part of the shape of the product M to another, only the shape head 36 may be replaced. That is, the shape head 36 may be replaced with another one in a state in which the fastening pin 39 which fastens the core body 31 and the shape head 36 is released. Of course, the shape core 30 is not completely separated from the first main core 27, that is, the front end portion of the shape core 30 protrudes from the first main core 27. It is also possible to replace the shape head 36.

Finally, a new product may be formed in a state in which the shape core in which the shape head 36 is replaced is assembled to the first template 23 and the first main core 27.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self-evident.

1 is a cross-sectional view showing the configuration of a mold assembly according to the prior art.

Figure 2 is a cross-sectional view showing the configuration of a preferred embodiment of a mold assembly according to the present invention.

Figure 3 is a cross-sectional view showing a shape core that is part of the embodiment of the present invention.

Figure 4 is a side view showing a fixing pin which is a part of the embodiment of the present invention.

5 to 7 is an operation state showing the process of separating the shape core in the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

20: fixed side plate 23: first mold plate

24: seating hole 25: pinhole

27: first main core 28: through hole

30: core core 31: core body

32: fixing groove 33: guide portion

34: fastening boss 36: shape head

39: fastening pin 40: fastening pin

42: press 43: stopper

45: fastening block 50: movable side plate

53: spacer block 55: second template

57: Second Main Core M: Products

Claims

A first mold plate fixed to the stationary side plate of the molding machine and provided with a first main core having a shape corresponding to the external appearance of the product;

A second mold plate provided on the movable side plate of the molding machine and having a second main core selectively contacting the first mold plate and cooperating with the first main core to form an appearance of the product;

A shape core installed through the inside of the first template and the first main core, and configured to shape a part of an appearance of the product;

The first plate is penetrated in a direction orthogonal to the shape core, and the pressing portion is formed to be inclined at the tip thereof, and is inserted into one side of the shape core to fix the position of the shape core, and into the first plate. And a fixing pin inserted and pressing an end portion of the shape core in a direction in which the shape core is separated.

The method of claim 1, wherein the fixing groove is formed in the outer surface of the shape core so as to be inclined downward in the direction in which the fixing pin is inserted, the position of the shape core by inserting the pressing portion of the fixing pin in the fixing groove Mold assembly, characterized in that the fixing.

The shape core of claim 2, wherein a guide part is formed at a rear end of the shape core so as to be inclined upwardly in a direction in which the fixing pin is inserted, and a pressing part of the fixing pin is inserted into the first plate to press the guide part. Mold assembly characterized in that the protruding from the main core and separated.

According to claim 2 or 3, wherein the shape core is installed in the mounting hole and the through hole penetrating the first template and the first main core, respectively,

The fixing groove of the shape core is located inside the pin hole formed in the first plate for the insertion of the fixing pin,

Mold assembly, characterized in that the shortest distance from the fixing groove to the guide portion is formed smaller than the inner diameter of the pinhole.

The mold according to claim 4, wherein the shape core comprises a core body in which the fixing groove is formed at one side, and a shape head selectively fastened to the tip of the core body and forming a part of the cavity. Assembly.

The fastening boss is formed at the front end of the core body so as to protrude, and the shape head is formed with a fastening groove into which the fastening boss is inserted, and the fastening pin is inserted into the fastening groove. The through assembly of the mold assembly, characterized in that for fastening the core body and the shape head.

First and second mold plates which are installed to face each other and move relative to each other, a fixing pin which is inserted into a pin hole formed in the first mold plate and is provided with an inclined pressing portion at an end thereof, and is orthogonal to the pin hole and fixed to one side In the mold assembly comprising a core body consisting of a core body is formed so that the fixing groove is inserted into a predetermined depth so that the pin is inserted and a shape head that is selectively fastened to the tip of the core body,

A first step of moving the fixing pin inserted into the fixing groove in a direction to be separated from the fixing groove;

A second step of rotating the fixing pin so that the pressing part faces the second template;

A third step of advancing a fixing pin toward the shape core so that the pressing portion presses the rear end of the shape core to protrude the shape core toward the second mold plate;

And a fourth step of replacing the shape head with another one in the protruding shape core.

8. The method of claim 7, wherein after moving the fixing pin in the direction to remove from the pin hole, the shape core is replaced by the shape head is reinserted into the first plate, the fixing pin is rotated so that the pressing portion is the second And facing the opposite direction of the template and inserting it into the fixing groove of the shape core to fix the shape core.