KR20090051646A - Mold assembly - Google Patents

Abstract

The present invention relates to a mold assembly. The present invention comprises a first and a second template (15, 40), and the first and second shape cores (20, 50) respectively provided therein. In this case, the first shape core 20 is installed to be movable from the first shape plate 15, and an elastic member 28 is provided between the first shape plate 15 and the first shape core 20. The first template 15 is configured to naturally push in the direction of the product (M). According to the present invention, since the product M is prevented from accommodating the first shape core 20 in the separation process of the first and second plate (15,40), the completeness and workability of the product (M) There is an advantage to be improved.

Mold assembly, core, anti-stick

Description

Mold assembly

The present invention relates to a mold assembly, and to a mold assembly for injection molding a product by injecting a molten synthetic resin material.

The mold assembly is mounted on a molding machine to produce the desired product. In general, the mold assembly includes a main core provided on an upper mold provided on the fixed side of the molding machine and a lower mold provided on the movable side to produce a product.

1 is a perspective view of the structure of the product molded by the mold assembly, and FIG. 2 is a cross-sectional view of the structure of the mold assembly according to the prior art.

As shown in these figures, the product M is formed with a plurality of through holes M '. The through hole M 'is formed through the outer surface of the product M, and may be formed at various positions in various shapes as shown.

Referring to the mold assembly for molding such a product (M), as shown in Figure 2, the fixed side plate (1) is provided on the fixed side of the mold assembly. In addition, a first mold plate 2 is provided on the fixed side plate 1, and a first main core 3 is provided inside the first mold plate 2. The first main core 3 is formed in a shape corresponding to the shape of the product M, and serves to substantially shape the product M together with the second main core 7 to be described later.

A movable side plate 5 is provided on the movable side of the mold assembly corresponding to the other side of the fixed side plate 1. The second side plate 6 is provided on the movable side plate 5, and the second main core 7 is provided on the second side plate 6.

Looking at the process of forming the product (M) by the mold assembly, first, the empty space is formed by the molten resin is injected through the injection hole (not shown) formed by the first and second main core (3,7) Is filled in. In this state, when the resin is solidified, the product M is completed, and the first and second mold plates 2 and 6 are separated in a direction away from each other. Finally, the product M is taken out from the mold assembly by a mill pin (not shown) or the like.

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

A through hole M 'is formed in the product M. In order to form the through hole M', the first and second main cores 3 may be formed at a portion corresponding to the through hole M '. 7) comes into contact with each other. When the product M is completed, the first and second main cores 3 and 7 are separated from the through hole M '.

However, in the process in which the first or second main cores 3 and 7 inserted into the through holes M 'are separated from the through holes M', the product M is formed in the first or second parts. There is a fear of being accompanied by 2 main cores (3, 7). This occurs more easily as the size of the through hole M 'is smaller. In addition, the product M may be deformed or damaged while the product M accompanies the first or second main cores 3 and 7. There is a falling problem.

Accordingly, it is an object of the present invention to solve the problems of the prior art as described above, and to provide a mold assembly which is prevented from accommodating the main core forming the product in the process of taking out the product.

In order to achieve the object as described above, the present invention is provided with a first main core having a shape fixed to the fixed side plate of the molding machine and having a shape corresponding to the external appearance of the product and the elastic member is installed on one side; And a second mold plate installed 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 first shape core provided to be movable in the relative movement direction of the first and second template plates, forming a through hole in the product, and receiving an elastic force in the direction of the second template plate by the elastic member; And a second shape core provided in the template and forming a through hole of the product in cooperation with the first shape core.

The first plate and the first shape core are connected to each other by a connecting bolt, the first plate is formed so that the bolt seating groove in which the head of the connecting bolt is seated to have a depth greater than the thickness of the head, The first main core is formed such that a screw groove into which a screw formed at the front end of the connecting bolt is assembled is recessed.

The difference between the recessed depth of the bolt seating groove and the thickness of the head portion of the connecting bolt is greater than or equal to the thickness of the product.

Surfaces facing each other of the first mold plate and the first shape core are formed with recessed grooves, respectively, so that both ends of the elastic member are seated.

Hanging jaws and locking jaws corresponding to each other are formed in the first template and the first shape core to be walked with each other.

In the present invention, since the first shape core forming the shape of the product is provided in the first plate to be movable by a predetermined distance in the product direction, the first shape core is separated from the product at a time difference from the first plate in the process of taking out the product. do. Accordingly, the product can be prevented from accommodating the first shape core, thereby improving the completeness of the product and improving workability.

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

3 shows the construction of a preferred embodiment of a mold assembly according to the invention in cross section. Hereinafter, a description of the product will be described with reference to FIG. 1 and the background art.

According to this, the stationary side plate 10 is provided on the stationary side of the mold assembly. The fixed side plate 10 is provided with a support plate 12. The support plate 12 may be omitted.

The base plate 12 is provided with a first mold plate 15. The first mold plate 15 is in close contact with the second mold plate 40 to be described below in the form of a plate corresponding to the fixed side plate 10. When the support plate 12 is not provided, the first mold plate 15 may be directly installed on the fixed side plate 10.

The first pocket 15 is formed with a core pocket 15 '. The core pocket 15 ′ is formed by inserting a part of the first template 15, and is a portion into which the first main core 19 to be described later is inserted.

The first seat plate 15 is formed with a bolt seating groove 16 is recessed. The bolt seating groove 16 is a part in which the head portion 26 of the connecting bolt 25 to be described later is seated, and is formed by being recessed on the other side of the surface facing the second mold plate 40 of the first mold plate 15. do.

At this time, as shown in Figure 3, the recessed depth (H) of the bolt seating groove 16 is formed larger than the thickness (h) of the head portion 26 of the connecting bolt (25). This is to allow the head portion 26 of the connecting bolt 25 to move to some extent within the bolt seating groove 16.

A bolt hole 17 is formed in the first mold 15. The bolt hole 17 is a portion into which the connecting bolt 25 is inserted, and the bolt seating groove 16 is connected to one end thereof, and the other side of the screw groove 21 of the first shape core 20 to be described later. Is connected.

The first groove 15 is formed so that the mounting groove 18 is recessed. The mounting groove 18 is formed by recessing one side of the first mold plate 15 facing one surface of the first shape core 20 which will be described later. The inside of the mounting groove 18 will be described below. A portion of the elastic member 28 is inserted.

The first main core 19 is installed in the core pocket 15 ′ of the first mold 15. The first main core 19 is formed to have a shape corresponding to the external shape of the product M, and serves to mold the product M together with the second main core 45 to be described later.

The first mold 15 is provided with a first shape core 20. The first shape core 20 cooperates with the second shape core 50, which will be described later, to form a part of the exterior of the product M and the through hole M '. In the present embodiment, the first shape core 20 is provided to be surrounded by the first main core 19, but is not necessarily limited thereto, and may be provided in parallel with the first main core 19.

In this case, the first shape core 20 is not fixed to the first plate 15, but is provided to be moved to a certain extent in the relative movement direction between the first plate 15 and the second plate 40. .

The first groove core 20 is formed so that the screw groove 21 is recessed. The screw groove 21 has a screw thread formed on the inner circumferential surface thereof so that the screw portion formed at the tip of the connecting bolt 25 is screwed.

Mounting grooves 22 are formed in the first shape core 20. The mounting groove 22 is formed by recessing one side of the first shape core 20 facing the mounting groove 18 of the first plate 15, and the mounting groove of the first plate 15 ( In cooperation with 18) to form a space in which the elastic member 28 can be seated.

The first plate 15 and the first shape core 20 are connected to each other by a connecting bolt 25. More precisely, the head portion 26 of the connecting bolt 25 is seated in the bolt seating groove 16, and the tip of the connecting bolt 25 corresponding to the opposite side of the head portion 26 is the screw groove ( 21, the first plate 15 and the first shape core 20 are connected to each other.

At this time, since the thickness h of the head portion 26 is smaller than the recessed depth H of the bolt seating groove 16, the connection bolt 25 is moved by the length corresponding to the difference Hh. Accordingly, the first shape core 20 can also move in the direction of the product M by the length Hh from the first plate 15.

In addition, the difference between the depth (H) of the bolt seating groove 16 and the thickness (h) of the head portion 26 of the connecting bolt 25 is preferably formed to be greater than or equal to the thickness of the product (M). Do. This is to allow the first template 15 to be separated from the through hole M 'of the product M at a time difference.

An elastic member 28 is provided in the space formed by the two mounting grooves 18 and 22. The elastic member 28 is positioned between the first plate 15 and the first shape core 20 to provide an elastic force in the direction of the second shape core 50 to the first shape core 20. It plays a role. In this embodiment, the elastic member 28 is a coil spring.

The movable side plate 30 is provided on the movable side of the mold assembly. The movable side plate 30 is installed at a position corresponding to the other side of the fixed side plate 10, and is relatively moved with the fixed side plate 10 by a separate driving source.

The space side block 32 is installed in the movable side plate 30, and the space plate 35 is provided in the space formed by the space block 32. The wheat plate 35 is moved by a separate rod (not shown) and serves to selectively move the mill pin (not shown) in the direction of the product (M).

 The second block 40 is provided in the space block 32. The second template 40 corresponds to the first template 15 and forms the product M while being in close contact with the first template 15.

The second main plate 40 is provided with a second main core 45. The second main core 45 serves to form a space corresponding to the appearance of the product M together with the first main core 19. That is, the first and second main cores 19 and 45 cooperate with each other to make an appearance of the product M.

The second shape plate 40 is provided with a second shape core 50. The second shape core 50 cooperates with the first shape core 20 to form an appearance of the product M and a through hole M ′. Unlike the first shape core 20, the second shape core 50 is installed to be fixed to the second shape plate 40. In the present embodiment, the second shape core 50 is provided to be surrounded by the second main core 45, but is not necessarily limited thereto, and may be provided to be parallel to the second main core 45.

Hereinafter, the operation of the mold assembly according to the present invention as described above will be described.

4 and 5 illustrate the operation of separating the first template 15 and the second template 40 in the embodiment of the present invention.

As shown in these figures, the resin in the molten state is injected into the space formed by the first main core 19 and the second main core 45. At this time, the first mold plate 15 and the second mold plate 40 are in close contact with each other.

In this state, when predetermined time passes and the said resin solidifies, the product M is completed. At this time, a through hole M 'is formed in the product M by the first shape core 20 and the second plate 40 provided in the first template 15. That is, a through hole M 'is formed in a portion where the first and second shape cores 20 and 50 are closely packed with each other.

As such, when the product M is completed, the first and second mold plates 15 and 40 are separated in a direction away from each other. More precisely, the movable side plate 30 is moved in a direction away from the fixed side plate 10 by a driving source, so that the second mold plate 40 is also separated from the first mold plate 15.

In this process, the first shape core 20 is pushed in the direction of the product (M) from the first plate (15). This is because the elastic member 28 is provided between the first shape core 20 and the first plate 15 to provide the elastic force in the direction of the product M to the first plate 15.

More precisely, since the head portion 26 of the connecting bolt 25 is provided in the bolt seating groove 16 formed in the first shape core 20 to be movable, the elastic member 28 may be used. The first shape core 20 can be moved to the direction of the product (M) to some extent. Accordingly, the first shape core 20 is moved with a predetermined time difference from the first plate 15.

In this case, even if the first shape core 20 in the state inserted into the through-hole M 'of the product M is separated from the product M, the product M is the first plate ( 15) coming in the direction is prevented. This is because the first shape core 20 keeps pressing the product M to some extent in the process of separating the first and second mold plates 15 and 40. This is illustrated in FIG. 4.

Next, when the first plate 15 and the second plate 40 are further away from each other, the first shape core 20 is also separated from the product M. In addition, the wheat plate 35 is raised, and accordingly, the mill pin is raised to separate the product M from the second mold plate 40.

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.

For example, the first plate 15 and the first shape core 20 do not necessarily need to be connected by the connecting bolt 25, and the first plate 15 and the first shape core 20 do not need to be connected to each other. The engaging jaw and the hanging jaw are formed to correspond to each other, and may be configured to walk with each other.

1 is a perspective view showing the configuration of a product manufactured by a mold assembly;

Figure 2 is a cross-sectional view showing the configuration of a mold assembly according to the prior art.

Figure 3 is a cross-sectional view showing the configuration of a preferred embodiment of a mold assembly according to the present invention.

4 and 5 is an operational state diagram showing a process of separating the first plate and the second plate in the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: fixed side plate 15: first mold plate

16: bolt mounting groove 17: mounting hole

19: First main core 20: First shape core

25: connecting bolt 26: head

28: elastic member 30: movable side plate

32: spacer block 35: plate

40: Second Edition 45: Second Main Core

50: second shape core

Claims (5)

A first main plate which is fixed to the fixed side plate of the molding machine, is provided with a first main core having a shape corresponding to the external appearance of the product, and the elastic member is installed on one side; A second mold plate provided on the movable side plate of the molding machine and provided with a second main core selectively contacting with the first mold plate and cooperating with the first main core to form an appearance of the product; A first shape core provided on the first plate so as to be movable in the relative movement direction of the first and second plates, forming a through hole in the product, and receiving elastic force in the direction of the second plate by the elastic member; Wow, And a second shape core provided on the second shape plate and configured to form a through hole of a product in cooperation with the first shape core. The method of claim 1, wherein the first plate and the first shape core is connected to each other by a connecting bolt, the bolt mounting groove in which the head portion of the connecting bolt is seated has a depth greater than the thickness of the head portion in the first plate It is formed to be concave to have a mold assembly, characterized in that formed in the first main core screw groove for assembling the threaded portion formed at the front end of the connecting bolt. The mold assembly according to claim 2, wherein a difference between the recessed depth of the bolt seating groove and the thickness of the head portion of the connecting bolt is equal to or greater than the thickness of the product. The mold according to any one of claims 1 to 3, wherein mounting grooves are recessed on the surfaces of the first mold plate and the first shape core facing each other so that both ends of the elastic member are seated. Assembly. The mold assembly according to claim 1, wherein the first mold plate and the first shape core are provided with a hooking jaw and a hooking jaw corresponding to each other.

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