KR20090073876A - Mold assembly - Google Patents

Abstract

A mold assembly is provided to remove the need of runner removal process by automatically cutting the runner connected to a product while electing the product. A mold assembly comprises a first template which is installed fixed on a fixed plate installed on a fixed part of a molding machine, a second template(20) which is mounted on a movable plate installed on a movable part and selectively makes contact with the first template, slide cores(30) including a seating groove and a core flow path, and a runner block(22) which is seated on the seating groove when the slide cores make contact and has a runner flow path(23) connected to the core flow path. The slide core moves in the direction perpendicular to the moving direction of the first and second templates to form a cavity corresponding to the product shape.

Description

Mold assembly

The present invention relates to a mold assembly, and more particularly, to a mold assembly for molding a product using a slide core.

In general, the mold assembly is molded by injecting and solidifying the molten resin into the cavity formed therein, thereby forming a product. More precisely, the mold assembly is divided into a fixed side and a movable side, and the fixed side and the movable side are provided with a shape core for forming a cavity corresponding to the shape of the product. When the resin injected into the cavity formed between the shape cores is solidified, the product is taken out while the two are separated.

1 is a cross-sectional view of a mold assembly according to the prior art, and FIG. 2 illustrates a structure of a slide core constituting a mold assembly according to the prior art.

According to this, the angular pin 2 is provided in the fixed side plate 1 provided on the fixed side of the molding machine, and the first mold plate 3 is provided. The first mold 3 is provided with a first core (not shown) to shape the product P.

A movable side plate 4 is installed on the movable side of the molding machine, and a spacer block 5 and a support plate 6 are installed on the movable side plate 4. On the support plate 6, the second mold plate 7 is again installed. The second mold 7 is provided with a second core (not shown) to form the product P together with the first core.

The second mold 7 is provided with a slide core 8. The slide core 8 is configured to shape a part of the product P while moving in a direction orthogonal to the relative movement directions of the movable side plate 4 and the fixed side plate 1. To this end, an angular hole 8 'into which the angular pin 2 is inserted is formed in the slide core 8. The slide core 8 is provided with a forming block 9, which is a part for forming the product P substantially.

Reference numeral 7 'is an inner core. The inner core 7 ′ is for molding the internal shape of the product P, and is installed on the second mold plate 7.

As shown in Figure 2, the product (P) is a forming block (9) of the slide core (8) surrounding the shape of the product (P) from both sides, and the inner core (molding) the inner shape of the product (P) 7 '), and the first and second cores are molded by a space made in cooperation. The molten resin is injected into the space, and when the resin is solidified, the product P is completed.

At this time, the first core and the forming block (9) is formed a runner flow path which is a kind of passage for the resin to flow into the space, when the resin remaining in the flow path becomes a runner (R).

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

After the product P is completed, the runner R remains on one side of the product P. This is because the runner flow path is formed in the forming block (9) forming the exterior of the product (P) by approaching from both sides, and the front end of the runner flow path is connected to the product (P), so that the forming block (9) is a product ( The runner R remains together with the product P even when separated from P).

This runner R should be separated from the product P. That is, as shown in Figure 2, even if the slide core (8) is moved to expose the product (P), the runner (R) remains connected to one side of the product (P), so the runner ( R) must be removed from the product (P). Accordingly, there is a problem that the work maneuver for manufacturing the product (P) is increased.

The present invention is to solve the problems of the prior art as described above, an object of the present invention is to allow the runner to be separated from the product in the process of separating the slide core forming the product appearance from the product.

According to a feature of the present invention for achieving the above object, the present invention is provided on the first mold plate provided on the fixed side plate installed on the fixed side of the molding machine, and the movable side plate provided on the movable side of the molding machine The second plate, which is in close contact with the first plate, and a cavity corresponding to the external shape of the product while moving on both sides in a direction orthogonal to the relative movement directions of the first and second plates on the second plate, A seating groove is formed on the opposite surface, and a slide core is formed to form a core flow path through which resin passes. It is configured to include a runner block is formed with a runner flow path connected to.

Runner channels are formed on surfaces of the slide cores facing each other so that the slide cores are in close contact with each other to form a core channel through which resin passes, and one end of the core channel is connected to the runner channel of the runner block.

One end of the runner flow path of the runner block is connected to the core flow path and the other end penetrates through the inside of the runner block and is connected to one side of the cavity.

The runner flow path is formed to be inclined in a direction closer to the second mold plate from one end connected to the core flow path to the other end connected to the cavity.

The runner block is formed by penetrating a mil pin hole in the relative movement direction of the first and second mold plates, and a mil pin enters and exits through the mil pin hole.

In the mold assembly according to the present invention, the following effects can be expected.

In the present invention, the cavity corresponding to the product appearance is formed by the slide core to move relative to each other, the resin is injected into the cavity by a runner flow passage penetrating the interior of the runner block that is separate from the slide core. Accordingly, the runner connected to the product in the process of taking out the product is cut off with the product at the end of the runner flow path of the runner block, so that a separate runner removal operation is not required after the product is taken out, thereby 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.

Figure 3 is a perspective view of the configuration of the fixed side of the configuration of the preferred embodiment of the mold assembly according to the invention, Figure 4 is a configuration of the slide core and runner block and runner constituting the embodiment of the present invention is shown in the main portion perspective view 5 and 6 are a perspective view and a front view showing the configuration of the second template is removed in the embodiment of the present invention. For reference, the slide core is removed from the left side in FIG. 3.

Hereinafter, only the movable side constituting the mold assembly will be described, and the description of the background art will be referred to for the configuration of the fixed side. The shape of the product will be described with reference to FIG. 2.

The movable side plate 10 is provided on the movable side of the mold assembly. The movable side plate 10 makes a product while moving in a direction with a fixed side plate (not shown) installed on the fixed side of the molding machine.

Spacer blocks 12 are installed on the movable side plate 10, and a close plate is provided between the spacer blocks 12. The wheat plate serves to move a mil pin (not shown) while moving the space formed by the spacer block 12.

The spacer block 12 is provided with a support plate 15, and the support plate 15 is provided with a second mold plate 20. The second mold 20 is a part that is in close contact with the first mold (not shown) on the fixed side, it is formed in a plate shape as shown.

The second template 20 is provided with an inner core 21. The inner core 21 is for molding into the inner shape of the product. In this embodiment, since four products are molded in one mold assembly, a total of four inner cores 21 are also provided.

At this time, as shown in Figure 4, the through-hole 21 'is formed in the inner core (21). The through hole 21 ′ is a passage through which the mill pin enters and exits the mill pin from the product.

The runner block 22 is installed in the second mold 20. The runner block 22 is connected to the core channel of the slide core 30 to be described below, and serves to inject molten resin into the product cavity 35 ′.

5 and 6, the runner block 22 is formed with a mil pin hole 22 'in the longitudinal direction thereof, that is, in the relative movement directions of the movable side plate 10 and the fixed side plate. The mill pin hole 22 'is a space into which the mill pin enters and exits in order to take out the runner R remaining in the runner flow path 23 to be described later.

A runner flow path 23 is formed in the runner block 22. The runner flow passage 23 has one end connected to the core flow path of the slide core 30 and the other end connected to one side of the cavity 35 'to transfer the resin delivered by the core flow path to the cavity 35'. Play a role.

At this time, the runner block 22 is formed to be inclined in a direction closer to the second mold 20 toward the other end connected to the cavity 35 'from one end connected to the core flow path as shown in FIG. . This is for the runner flow path 23 to be formed toward the opposite side to the direction in which the mill pin is protruded to take out the product, so that the product and the runner (R) is more surely cut.

The runner flow path 23 is formed through the runner block 22. That is, at least a portion of the runner flow passage 23 is surrounded by the runner block 22 to be a kind of passage. Reference numeral 24 denotes a shielding surface 24 that is naturally formed by the runner passage 23 being formed through the runner block 22.

The second rail 20 is provided with a guide rail 25. The guide rail 25 is for guiding the slide core 30 to be described later, as shown, is provided in pairs on both sides.

A locking block 27 is installed on the outer surface of the second mold 20. The locking block 27 supports one side of the slide core 30 to prevent the slide core 30 from being pushed by the internal pressure of the mold assembly.

The slide core 30 is installed. The slide core 30 forms the product while moving on the second template 20 along the guide rail 25. More precisely, the slide core 30 molds the product while moving in a direction orthogonal to the relative movement direction of the first and second mold plates 20.

An angular hole 32 is formed in the slide core 30. Although not shown, the fixed side plate angular pin is provided, and the slide core 30 is moved by being inserted into the angular hole 32.

The slide core 30 is provided with a molding unit 35. The molding part 35 is installed on the slide core 30 toward the runner block 22, and serves to substantially shape the product.

At this time, the slide core 30 is moved from both sides, the forming portion 35 of the two slide core 30 cooperate with each other to create a cavity (35 ') corresponding to the product shape. In this embodiment, a total of four slide cores 30 are installed, and a pair of slide cores 30 form two products.

A seating groove 35 ″ is recessed in the molding part 35 of the sulfide core. The seating grooves 35 ″ are formed by concave sides of the slide cores 30 on both sides thereof, and the runner block 22 is seated therein.

Runner channels 36 are formed on surfaces of the slide cores 30 on both sides thereof facing each other. The runner channel 36 is connected to a flow path formed through the fixed side plate and the first mold plate to inject molten resin. The runner channel 36 cooperates with both slide cores 30 to form a core channel through which resin passes, and one end of the core channel is connected to the runner channel 23 of the runner block 22. .

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

First, resin is injected into the cavity 35 ′ formed by both slide cores 30. In this state, when the high temperature and high pressure is applied to the inside of the mold assembly, the resin solidifies and the product is completed. The interior of the product is formed by the inner core 21.

On the other hand, resin is injected into the cavity 35 ', wherein the molten resin passes through a core flow path formed by the two slide cores 30 to cooperate with the runner flow path 23 formed in the runner block 22. Delivered. The resin moves along the runner flow path 23 and is injected into the cavity 35 ′. This is possible because the core channel and the runner channel 23 are connected.

At this time, the angular pin installed in the first template is completely inserted into the angular hole 32 of the slide core 30. One side of the slide core 30 is supported by the locking block 27 to prevent the slide core 30 from being pushed.

In this state, the first plate and the second plate 20 are separated from each other. At the same time, the angular pin of the first plate moves out of the angular hole 32 of the slide core 30 and moves the slide core 30 in a direction away from the product.

In this case, only the two slide cores 30 are separated from each other in the state where the inner core 21 and the runner block 22 are in place. This is shown in FIG. 3.

As a result, the product inside the cavity 35 ′ formed by the slide core 30 is exposed to the outside, and at the same time, the mil pin rises through the through hole 21 ′ of the inner core 21. The product is pushed up and taken out.

At this time, the flowed resin remains in the core flow path and the runner flow path 23 to solidify, thereby becoming a runner R. The runner R remains in a flow path shape as shown in FIG. 4. This runner R is a part to be separated from the product.

As the mil pin rises through the through hole 21 ′, the mil pin also rises through the mil pin hole 22 ′ in the runner block 22. Accordingly, the runner R is taken out from the runner flow path 23 by the mil pin which rises through the mil pin hole 22 '.

That is, the product and the runner R are simultaneously moved away from the second template 20. At this time, the runner R is inserted into the runner flow path 23 and its tip is formed to be connected to the product. However, the runner R is naturally separated from the product in the process of being lifted by the milpin.

The runner R is applied to the shielding surface 24 formed as the runner flow path 23 is formed through the inside of the runner block 22 in the process of the runner R rising. At the same time, it does not rise and is cut in the middle. In particular, since the runner flow path 23 is formed to be inclined toward the second mold 20 so as to be opposed to the upward direction of the mill pin to some extent, this cutting process is made easier.

On the other hand, the runner (R) is inserted into the runner flow path 23, but the elastic deformation is possible due to the characteristics of the material, and after the product is cut with the elastic run out of the runner flow path 23 after being cut out.

As such, the runner R is naturally separated from the product during the taking out process, so that the runner R does not need to be removed through a separate operation.

The scope of the present invention is not limited to the embodiments described above, but is 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 perspective view showing the configuration of the slide core constituting the mold assembly according to the prior art.

Figure 3 is a perspective view showing the configuration of the fixed side of the configuration of the preferred embodiment of the mold assembly according to the present invention.

Figure 4 is a perspective view showing the configuration of the slide core and the runner block and the runner constituting an embodiment of the present invention.

Figure 5 is a perspective view showing the configuration of a state in which the second template is removed in the embodiment of the present invention.

Figure 6 is a front view showing the configuration of a state in which the second template is removed in the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: movable side plate 12: spacer block

15: base plate 20: second plate

21: inner core 21 ': through hole

22: Runner Block 23: Runner Euro

24: shielding surface 25: guide rail

27: locking block 30: slide core

32: angular hole 35: molding part

35 ': Cavity 35' ': Seating groove

Claims (5)

A first mold plate provided on the fixed side plate provided on the fixed side of the molding machine, A second mold plate provided on the movable side plate provided on the movable side of the molding machine and in close contact with the first mold plate; Forming a pair on the second plate and moving in both directions in a direction orthogonal to the relative movement direction of the first and second plate to create a cavity corresponding to the appearance shape of the product and the mounting grooves are formed on the surface facing each other and the resin A slide core through which a core flow path is formed,  And a runner block installed on the second mold plate, the runner block being formed in the seating groove when the slide cores of the two sides are in close contact with each other. According to claim 1, wherein runner channels are formed on opposite surfaces of the slide cores on both sides to form a core flow path through which resin passes through when the slide cores are in close contact with each other. Mold assembly characterized in that connected to the runner flow path. The mold assembly of claim 1 or 2, wherein one end of the runner flow path of the runner block is connected to the core flow path and the other end is connected to one side of the cavity through the inside of the runner block. The mold assembly according to claim 3, wherein the runner flow passage is formed to be inclined in a direction closer to the second mold plate from one end connected to the core flow passage to the other end connected to the cavity. The mold assembly according to claim 4, wherein the runner block is formed by penetrating a mil-pin hole in the relative movement direction of the first and second mold plates, and mil-pin for taking out the runner through the mil-pin hole.

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