KR20090019103A - A contraction it was possible of mold device - Google Patents

Abstract

A molding apparatus which is contracted in order to form the groove inside the injection-molded article is provided to reduce the manufacturing cost of the mold by replacing the mold in order to variously change the inner shape of product. A molding apparatus which is contracted in order to form the groove inside the injection-molded article comprises the main core(10) which having the rail section(12) formed in the one side of body(11), and rail formed in the right and left of upper and lower part and rail section of the body(11R,12R); the first up and down movement core(20) of the pair it has the arc protrudent part(21) for the extrudate inside molding on the upper side; the second up and down movement core(40) of the pair it has the arc protrudent part(41) for the extrudate inside molding on the other side; and the stopper(50) having the holder(51) protruded to the fixed width in upper and lower part.

Description

A contraction it was possible of mold device to form a groove inside the injection molding

The present invention relates to a mold that is inserted into the inside of the molded product to be molded at the same time with the outer circumferential surface of the molded product at the time of injection molding, in more detail the groove and the inclination, etc. in the inside of the molded product When molding, in order to solve the problem that the mold mold is caught in the groove and the inclined portion of the molded product, the protrusion of the mold for forming the groove or the inclined portion is contracted to reduce the outer circumferential surface of the inner mold, thereby forming the protrusion of the mold. The invention relates to a mold apparatus which is contracted to form a groove in an injection molded product which is easily removed after molding, by preventing it from being caught by a product.

In general, when molding a product through a mold, only the outer surface of the product can be embossed or embossed in various shapes and projections, inclined surface, etc. has the advantage of producing a large amount of the same product.

For this reason, most plastic products that are easily molded are manufactured using molds.

These molds are assembled by assemble at least two or more molds having a specific shape, put the molten injection material in the gap formed between the molds, and then cooled and hardened, it is necessary to remove the mold to remove the completely hardened product from the mold Since the work must be carried out, there was a problem that the internal molding, which cannot be removed, cannot be performed.

That is, when molding a product in which a hole penetrating the inside, such as a plastic circular pipe, it is possible to form a simple straight hole, but if wrinkles, grooves, inclinations, etc. are formed inside, the inner mold is not removed later There was.

Therefore, most of the inside is molded into a straight hole, and then cut as necessary to form grooves or bevels and wrinkles, which are difficult to manufacture, and do not grasp the center point of the formed injection molded product and are cut and grooved and beveled and wrinkles. There is a problem that the defective product is generated eccentricity, and because the product processing part has to be injected thick for cutting, there is a problem that a lot of bubbles are generated and the consumption of the material in the cutting site.

Therefore, the present invention has been invented in view of the above-described conventional problems, and the first object of the present invention, when forming the product through a mold, so that the molding as well as the outer peripheral surface of the product to be injected can be made at the same time, An object of the present invention is to provide a mold in which an outer circumferential surface of a mold having an inner shape of a product is contracted.

It is a second object of the present invention to provide a mold for internal molding which can be interchangeably coupled to variously change an inner shape of a product.

The third object of the present invention is that when the mold is inserted into the mold, the outer circumferential surface is automatically expanded to form inclinations, protrusions and wrinkles, and when the mold is taken out, protrusions such as inclination, protrusions and wrinkles are automatically contracted to remove the mold. To provide a mold that is leveled so that it can be.

The above objects and other objects, advantages and features of the present invention will become more apparent from the following detailed description for the practice of the invention in connection with the accompanying drawings showing the preferred embodiments.

The apparatus of the present invention according to the above object, the rail portion of a predetermined length is formed on one side of the body having a predetermined size, the main core is formed on the upper and lower sides of the body and the left and right sides of the rail portion, respectively, One side is coupled and moved to the rail, and has a pair of upper and lower first moving cores having an arc-shaped protruding jaw for forming the injection molding on the upper surface, and one side is coupled and moved to the rail of the rail, A movable body having a predetermined size having a rail formed on the side, and coupled to the rail of the upper surface of the movable body, and having a pair of left and right second moving cores having an arcuate projection jaw for forming the injection molding on the other side, the main It is achieved by being composed of a stopper formed at the rail end of the core, the engaging portion is formed to protrude a predetermined width up and down.

Here, the rail formed on the body of the main core is formed of a tapered rail having a predetermined inclination, the rail formed on the rail portion may be implemented to be formed horizontally along the rail portion, the movable body is the bottom surface It is provided with a rail coupled to a portion, and may be implemented with a tapered rail having a predetermined slope on the upper surface.

Meanwhile, the rail part may further include a groove part having a predetermined size at a position where the first moving core is contracted downward on upper and lower sides, and may further include a protrusion at a rail end, and the protruding jaw of the first and second moving cores. The silver may be formed to be inclined so that a predetermined inclined groove is formed on the inner surface of the molded product to be injected.

With the use of a mold contracted to form the internal grooves of the present invention obtained through the above-described objects and means for achieving the object, when forming a product through a mold, the molding as well as the outer peripheral surface of the product to be injected There is an advantage that can be achieved at the same time.

In addition, the inner shape of the product can be changed and combined to change variously to reduce the cost of manufacturing the mold, and when the mold is inserted into the mold, the outer peripheral surface is automatically extended to form inclination, protrusion, wrinkles, etc. When the mold is taken out, protrusions such as inclinations, protrusions, and wrinkles are automatically contracted, and thus the molds are kept horizontal so that the mold can be removed.

Therefore, there is an advantage that can save time and costs for injection molding production.

Hereinafter will be described in more detail with reference to the accompanying drawings showing an embodiment of the present invention.

The present invention is a rail portion 12 of a predetermined length is formed on one side of the body 11 having a predetermined size as shown in Figure 1 and Figure 2, the upper and lower sides of the body 11 and the left and right sides of the rail portion 12 The main core 10 in which the rails 11R and 12R are formed in each is provided. Here, the main core 10 may be manufactured in various shapes such as square or circle and polygon.

In addition, one side is coupled to the rail (11R) of the body 11 is moved, and provided with a pair of upper and lower sides of the first movable core 20 is formed on the upper surface arcing projection jaw 21 for forming the injection molding. One side is coupled to and moved by the rail 12R of the rail unit 12, and includes a movable body 30 having a predetermined size on which rails 30R and 30R ′ are formed at upper and lower sides, and the movable body 30. A pair of left and right pairs of second moving cores 40 and a rail portion of the main core 10 which are coupled to the upper rail 30R 'and are moved and have an arc-shaped protruding jaw 41 for forming an injection molding on the other side thereof. (12) It is composed of a stopper (50) formed at the end and having a catching portion (51) protruding a predetermined width upward and downward.

Meanwhile, the rail 11R formed on the body 11 of the main core 10 is formed of a tapered rail having a predetermined inclination, and the rail 12R formed on the rail part 12 is a rail part 12. Is formed horizontally.

In addition, the movable body 30 is provided with a rail 30R coupled to a rail 12R of the rail portion 12 on a bottom surface thereof, and is provided with a tapered rail 30R 'having a predetermined slope on an upper surface thereof. .

On the other hand, in the practice of the present invention, the rail portion 12 further includes a groove portion 12H of a predetermined size at a position where the first moving core 20 is contracted downward on the upper and lower sides, and ends of the rail 12R. It may be implemented by further having a protrusion 12B.

In addition, the protruding jaws 21 and 41 of the first and second moving cores 20 and 40 may be formed to be inclined so that a predetermined inclined groove is formed on the inner surface of the molded product to be injected.

The mold apparatus contracted to form a groove in the injection molded product of the present invention configured as described above moves a plurality of first and second to the main core 10 having a predetermined size as shown in FIGS. 1 and 2. The cores 20 and 40 are coupled to form a structure, which is the first coupled along the rails 11R and 12R formed in the body 11 and the rail part 12 of the main core 10, respectively. , 2 moving cores (20, 40) is reciprocating sliding to contract or expand the outer peripheral surface of the main core (10).

Shrinkage or expansion of the first moving core 20 is a tapered rail (11R) formed on the center side of the inclined surface (11A) formed in a pair of upper and lower body 11 of the main core 10, and the body ( The rails 20R of the first moving core 20 having the inclined surface 20R corresponding to the inclined surface 11A of 11 are formed on one side thereof, and thus the first moving along the two inclined surfaces 11A and 20A. The core 20 is slidably moved in a diagonal direction so that the protrusion jaw 21 in the up and down direction is contracted or expanded.

In this case, when the first moving core 20 is contracted, the groove 12H having a predetermined size may be formed in the upper and lower rail parts so as to prevent the contraction of the first moving core 20 from being inhibited due to the rail 12. The first moving core 20, which is diagonally downward, is inserted into the groove portion 12H by a predetermined depth so as to be formed and formed in the groove 12, and is locked.

On the other hand, the 2nd moving core 40 which has the protruding jaw 41 in the left-right direction is tapered rail 30R 'of the upper inclined surface 30A of the movable body 30 joined to the rail 12R of the rail part 12. As shown in FIG. ), When the movable body 30 is caught by the projection 12B at the end of the rail 12R after the predetermined width horizontal movement along the rail 12R, the inclined surface 30A of the movable body 30 and the second moving core Along the inclined surface 40A of the 40, the second moving core 40 slides downward in the diagonal direction and contracts.

The protruding jaws 21 and 41 formed on the outer circumferential surfaces of the first and second moving cores 20 and 40 may be formed by arcs having a size of one circle divided into four, so that the outer circumferential surfaces are connected to each other. .

In addition, the inner prosthetic tube 100 is caught through the stopper 50 provided at the end of the rail unit 12 of the main core 10, and the prosthetic tube 100 is removed together with the removal of the main core 10. .

This invention will be described in more detail with reference to the following assembly example.

Assembly example

First, as illustrated in FIG. 3, the first moving cores 20 are coupled to the upper and lower inclined surfaces 11A of the main core 10 by rails 11R and 20R, respectively.

Thereafter, as illustrated in FIG. 4, the rails 30R 'and 40R are coupled to the inclined surfaces 30A and 40A of the movable body 30 and the second movable core 40, and then the rail 30R of the bottom surface of the movable body 30 is connected. And the rails 12R on both sides of the rail part 12 are combined. At this time, the projecting portion 12B of the rail 12R is coupled and fixed after fastening the movable body 30, or is performed by forcibly coupling the rail 30R of the movable body 30.

After coupling the first and second moving cores 20 and 40 as described above, the prosthetic tube 100 as shown in FIG. 5 is inserted between the rail portions 12, and then the stopper 50 is fastened and fixed.

In this case, the prosthetic tube 100 is formed at one end of the locking jaw 110, and is coupled to the prosthetic tube 100 by being caught by the locking portion 51 of the stopper 50.

The present invention assembled as described above will be described in more detail with reference to the following examples.

<Use example>

After the outer peripheral surface mold 210 and the lower mold 220 are combined, the main core 10 of the present invention, in which the first and second moving cores 20 and 40 and the moving body 30 are assembled, is inserted into the mold center side. The movable body 30 and the second moving core 40 are moved up and down by the prosthetic tube 100, thereby moving the second body along the inclined surfaces 30A and 40A of the moving body 30 and the second moving core 40. The core 40 protrudes to the outer circumferential surface. At this time, upward pressure acts on the bottom surface of the first moving core 40 by both side ends of the second moving core 40 that moves, so that the second moving core 40 diagonally along the inclined surfaces 11A and 20A. It moves upwards and protrudes.

As such, when the main core 10 is inserted into the outer circumferential surface mold 210 and the lower mold 220, the first moving core 20 and the second moving core 40 are formed by the prosthetic tube 100 as shown in FIG. 6. Protruding jaws of 21 and 41 are laid on the same line to form a circular protruding jaw.

Therefore, the molten molding material is put into the gap between the outer circumferential surface mold 210 and the main core 10 and cooled for a long time to simultaneously perform the outer circumferential surface and the inner circumferential surface molding.

When the molded product 300 is completely hardened by cooling for a long time, the outer peripheral surface mold 210 and the lower mold 220 are separated and removed as shown in FIG. 7.

In addition, when the main core 10 inserted into the molded product 300 in which the outer circumferential surface mold 210 and the lower mold 220 are removed as shown in FIG. 8, the lower prosthetic tube 100 and the second movable core are pulled out. A gap is formed between the 40, and the position of the second moving core 40 is fixed by the internal locking groove of the molded product 300, and as a result, the movable body 30 is horizontally moved.

At this time, when the movable body 30 which is horizontally moved is caught and fixed to the protrusion 12B at the end of the rail 12R of the rail unit 12, the inclined surfaces 30A and 40A of the second moving core 40 and the movable body 30 are fixed. It moves downward diagonally, through which the second moving core 40 is completely contracted to remove the protrusion of the protruding jaw 41.

On the other hand, as the second moving core 40 is moved, the first moving core 20 in which the pressing fixation is eliminated is fixed by an internal locking groove and is moved downward along the inclined surface 11A. One end is inserted and fixed in the groove portion 12H and automatically contracted.

On the other hand, when the main core 10 is continuously raised, as shown in Figure 9, the locking jaw 110 of one end of the prosthetic tube 100 is coupled to the end of the rail unit 12, the locking portion 51 of the stopper 50 ), The prosthetic tube 100 is removed together with the main core 10 at the same time.

Through the present invention, it is possible to manufacture the inclination or groove and wrinkles, etc. in the interior as shown in Figure 10 with the outer circumferential surface, and provided with the present invention on both sides inclined or grooves and wrinkles at both ends as shown in Figure 11 It is possible to manufacture a product that has been formed.

Meanwhile, in the present invention, the protruding jaws 21 and 41 of the first and second moving cores 20 and 40 are, for example, first and second moving cores 20 and 40 as shown in FIG. 12. Protruding jaws (21, 41) formed on the outer circumferential surface of the can be square and groove, semi-circular and can be modified in a composite configuration.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is obvious that all modifications belong to the appended claims.

1 is a perspective view showing an example of a mold apparatus that is contracted to form a groove in the injection molding of the present invention.

Figure 2 is a separate perspective view showing an example of a mold apparatus that is contracted to form a groove in the injection molding of the present invention.

Figure 3 is a perspective view showing a coupling example of the first moving core of the mold apparatus shrinking to form a groove in the injection molding of the present invention.

Figure 4 is a perspective view showing a coupling example of the second moving core of the mold apparatus shrinking to form a groove in the injection molding of the present invention.

Figure 5 is a perspective view showing an example of the prosthetic tube inserted into the bottom of the mold apparatus to be contracted to form a groove in the injection molding of the present invention.

Figure 6 is a side cross-sectional view showing an example of the use of the mold apparatus shrinking to form a groove in the injection molding of the present invention.

Figure 7 is a side cross-sectional view showing an example of the external mold separation of the mold apparatus shrinking to form a groove inside the injection molding of the present invention.

Figure 8 is a side cross-sectional view showing an example in which the main core is removed from the mold apparatus shrinking to form a groove in the injection molding of the present invention.

Figure 9 is a side cross-sectional view showing an example of separation of the main core and the molded product of the mold apparatus shrinking to form a groove in the injection molding of the present invention.

10 is a perspective view showing an example of a molded product that is injected using a mold apparatus that is contracted to form a groove in the injection molding of the present invention.

11 is a perspective view showing another embodiment of a molded product that is injected using a mold apparatus that is contracted to form a groove in the injection molding of the present invention.

Figure 12 is a side cross-sectional view showing another embodiment of the first and second mobile core of the mold apparatus shrinking to form a groove in the injection molding of the present invention.

[Explanation of symbols on the main parts of the drawings]

10: main core 11: body

12: rail portion 12H: groove portion

12B: protrusion 20: first moving core

21: protruding jaw 30: moving object

40: second moving core 41: protrusion jaw

50: stopper 51: locking portion

11 A, 20 A, 30 A, 40 A: slope

11R, 12R, 20R, 30R, 30R ', 40R: Rail

Claims (5)

In the mold for inserting the inside of the injection molding to mold the inner surface of the injection molding, The rail part 12 having a predetermined length is formed on one side of the body 11 having a predetermined size, and the rails 11R, 12R are formed on the upper and lower sides of the body 11 and the left and right sides of the rail part 12, respectively. A core 10; A pair of upper and lower pairs of first moving cores 20 having one side coupled to the rail 11R of the body 11 to move and having an arc-shaped protruding jaw 21 for forming an injection molding on an upper surface thereof; One side is coupled to the rail (12R) of the rail unit 12 is moved, the movable body 30 of a predetermined size is formed in the upper and lower rails (30R, 30R '); A pair of left and right second moving cores 40 which are coupled to the rail 30R 'of the upper surface of the movable body 30 and are moved on the other side, and an arc-shaped protruding jaw 41 for forming the injection molding is formed on the other side thereof; Is formed of the stopper 50 formed at the end of the rail portion 12 of the main core 10, the engaging portion 51 is formed to project a predetermined width up and down, The first and second moving cores 20 and 40 coupled to the slopes of the main core 10 are slid along the rails 11R, 12R, 30R, and 30R ', so that the width of the outer circumferential surface of the main core 10 expands and contracts. A mold apparatus that is contracted to form a groove in the injection molding, characterized in that The method of claim 1, The rail 11R formed on the body 11 of the main core 10 is formed of a tapered rail having a predetermined inclination, and the rail 12R formed on the rail part 12 forms the rail part 12. The mold apparatus is contracted to form a groove in the injection molding, characterized in that formed along the horizontal. The method according to claim 1 or 2, The movable body 30 has a rail 30R coupled to a rail 12R of the rail part 12 on a bottom surface thereof, and a tapered rail 30R 'having a predetermined slope on an upper surface thereof. Mold apparatus that is shrunk to form a groove in the injection molding. The method according to claim 1 or 2, The rail portion 12 further includes a groove portion 12H having a predetermined size at a position where the first moving core 20 is contracted downward on the upper and lower sides, and further includes a protrusion portion 12B at an end of the rail 12R. That is, A mold apparatus that is contracted to form a groove in the injection molding, characterized in that the first moving core 20 and the movable body 30 are slid. The method according to any one of claims 1 to 3, Protruding jaws 21 and 41 of the first and second moving cores 20 and 40 are formed to be inclined so that a predetermined inclined groove is formed on the inner surface of the molded product to be injected. Shrinkable mold device.

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