KR200489207Y1

KR200489207Y1 - Slides for undercut molding of injection molds

Info

Publication number: KR200489207Y1
Application number: KR2020170005987U
Authority: KR
Inventors: 오상민
Original assignee: 오상민
Priority date: 2017-11-24
Filing date: 2017-11-24
Publication date: 2019-05-15

Abstract

The present invention relates to a slide for an undercut molding of an injection mold capable of forming an undercut shape of an injection product by being operated at any one of the fixed side mold and the movable side mold by the opening and closing operation of the mold, A spring is provided on the inner side of the slide body 1 which is a hexahedron with the upper plate 4 and the lower plate 5 coupled to each other and the actuating block 3 is provided with a spring, The inclined surface of the pressing block 2 slides on the working block inclined surface 34 and presses the working block 3 to advance the pressing block 2. When the pressing block 2 ascends by the pressing block spring 6, 3, and the movable block 3 is retracted by the operation block spring 7, the undercut core is coupled to the front surface of the device hole 31 of the operation block 3 so that the mold is interlocked when closed, Each independent It is possible to eliminate the damage of the slide and the cause of the failure in the operation of the mold by dispensing the interference between the press block and the operation block, so that it is convenient to use and ensures safe and smooth operation. The product can be continuously produced, and an injection molded product excellent in quality and excellent in productivity can be obtained.

Description

Technical Field [0001] The present invention relates to a slide for an undercut molding of an injection mold,

The present invention relates to a slide for forming an undercut, and more particularly, to a slide for forming an undercut of an injection molded article, which is provided on either one of a stationary-side mold and a movable-side mold, To a slide for forming an undercut of an injection mold.

In general, injection molded products are molded using an injection mold when the product is manufactured by injection molding. In this way, the injection mold used for injection molding is a mold in which the movable side is fixed in one direction The molding process is a molding process in which a movable mold and a fixed mold are closed so that the mold is closed and the molten resin is filled in the mold and then solidified and the molded article is taken out. .

The injection molds are configured to mold and take out the injection products by the open / close operation method of the upper, lower, left, and right openings. Thus, holes or grooves, which are shapes provided inside the injection molds in the direction of opening / closing of the mold, Was molded with an undercut molding apparatus as a separate mechanism.

The undercut molding apparatus of the injection mold according to the related art has a structure in which the movable core provided in the movable mold is closed so as to enter the cavity of the stationary mold to form a molding space of the molded product, The block is slid by the hydraulic pressure of the hydraulic cylinder so that the core pin protrudes to the side surface of the cavity.

According to the above configuration, the molten resin injected from the injection machine through the injection port of the injection mold is filled between the cavity and the movable core to form the inward and outward directions of the injection molding. At the same time, the undercut is formed by the core pin, To slide the slide block to an initial state to release the core pin from the injection product, to open the movable side mold in the fixed side mold, and to take out the molded article.

As described above, in the undercut molding apparatus of the injection mold, a separate mechanism for driving the slide block on the outside of the mold for forming an undercut on the inner side of the injection molding or for the removal process must be provided on the injection mold, Since the mold is closed and opened after the operation of the separate mechanism for driving the block, the production operation time is lengthened as a whole, and the productivity is lowered.

On the other hand, it has been proposed and used in recent years to improve the drawbacks of the prior art and to allow the slide block, which is an undercut molding device, to be operated by the movable mold, as in the public utility models 20-2014-0002859 and 1079434, Open Publication No. 20-2014-0002859 discloses an upper core that is relatively movable with respect to a lower core and forms a cavity for injection between the lower core and the upper core,
A horizontal movable block portion horizontally movably disposed on the lower core and including a slide core forming an undercut of the cavity and a horizontal movable block connected to the slide core to horizontally move the slide core; And a vertical movable block vertically movable with respect to the lower core to press or release the horizontal movable block, wherein the horizontal movable block is elastically supported in a horizontal direction with respect to the lower core, The upper and lower molds being formed with an undercut shape in which the horizontal movable block is moved forward and backward by a vertical movable block so as to be elastically supported in a vertical direction with respect to the lower core, Vertical and horizontal movable blocks are combined , The mold is manufactured and the operation range of the horizontal and vertical movable blocks are taken into consideration to assemble them integrally to limit the structure of the mold and increase the manufacturing cost of the mold .

In addition, Patent Registration No. 1079434 discloses a moving block which is coupled to a slide body inserted in a slide groove formed in a lower mold constituting a mold and fixes an undercut core for forming an undercut, An operation block for moving the moving block forward and backward by an upper mold located on the upper side of the lower mold positioned between the rear end of the moving block and the slide body and constituting an integrated slide for a mold, The operation block is coupled to the bottom of the slide body so that the moving block coupled to the slide body and the operation block are coupled to the bottom plate and the operation block lowered by the upper mold is raised between the bottom surface of the operation block and the finish plate And the movable block and the operation block are engaged with each other, And the moving block is inclined forward and backward in accordance with the lowering and the rising of the operating block so that the operating block can move forward and backward by the opening and closing operations of the movable mold This is advantageous in that it is easy to use by disposing a separate actuating device for operating the slide on the outer side of the mold, but the elastic member is interposed only at the lower end of the actuating block, and the actuating block and the moving block are engaged with each other, When the undercut forming core is bent by the molded product in the upward, downward, leftward, and rightward directions, the moving block combined with the sliding block engaged with the sliding block and the sliding block of the operating block are engaged with each other The operation of the operation block and the moving block is restricted due to the occurrence of the imhyeon phase, Wrong operation, and the moving block is fixed to the movable mold and the mold is operated in the returned state, and the slide block is broken there is a defect that occurs frequently.

Patent registration No. 1079434

The object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for forming an undercut in an injection mold by an opening or closing operation of an injection mold, A slide block in which a moving block which engages with each other is dispensed with and a moving block and an operating block respectively operate when the moving block and the working block are operated and restored respectively through the elastic members to the moving block and the working block, The proposal has its purpose.

According to an aspect of the present invention, there is provided a mold comprising a slide body to be inserted into a slide groove formed in a stationary mold or a movable mold according to the shape of an injection molded product, And a pressurizing block for causing the operating block to be operated back and forth by a closing operation. And a working block for engaging the undercut cores. The pressurizing block and the operating block each operate through the spring and pass through the operating inclined surfaces of the pressurizing block and the operating block, And a block spring is installed.

In the present invention as described above, the sliding surface of the press block and the operation block come into close contact with each other and are supported by the respective springs, so that when the mold is closed, the press block and the operation block operate in conjunction with each other, It is easy to use and safe and smooth operation is ensured by eliminating the interference of blocks and eliminating the cause of breakage or trouble in slide operation during mold operation, so that uniform products can be continuously produced even when used for a long time And an injection molded product having excellent quality and excellent productivity can be obtained.

In addition, since the pressing block spring groove and central axis are formed at the central portion of the operating block inclined surface in the same manner, and the pressing block spring is supported by the lower plate through the cutting groove, the size of the slide block can be reduced. There is an advantage that the limitation by the position and the size can be minimized.

1 is a perspective view of the present invention;
2 is an exploded perspective view of the present invention
3 is a sectional view taken along the line AA in Fig. 4
4 is a cross-sectional view taken along the line BB of Fig. 3, Fig. 4 (A) is a cross-sectional view showing a state in which the operating block is retracted in a state in which the pressing block is raised, and Fig. 5 (B) is a sectional view showing a state in which the operating block has moved forward.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of the present invention, and FIG. 2 is an exploded perspective view showing a configuration of the present invention.

That is, in the present invention, the upper and lower plates 4 and 5 are combined to form a hexahedron, and the inner side of the slide body 1 is supported by a spring on the press block 2 and the operation block 3, respectively, When the block 2 descends, the inclined surface of the pressing block 2 slides on the working block inclined surface 34 to press the operating block 3 forward and the pressing block 2 ascends by the pressing block spring 6 The operation block 3 is also configured to be retracted by the operation block spring 7 so as to engage the undercut core on the front surface of the device orifice 31 of the operation block 3

The slide body 1 is opened at the upper side and the lower side to form the device groove 12 in the inside and the device groove 12 is formed at one side of the slide body 1, Thereby forming a groove.

The upper and lower plates 4 and 5 are coupled to the upper and lower surfaces of the slide body 1 and the upper plate 4 is engaged with the operating groove into which the pressing protrusion 24 of the pressing block 2 41 are formed.

The pressing block 2 has a pressing block inclined surface 21 formed on its front surface and an upper portion formed of a pressing protrusion 24 and a spring groove 23 formed along the vertical center of the pressing block 2 And a supporting step 22 is formed on both sides of the inclined surface.

The operation block 3 has a rear surface formed with an operation block inclined surface 34 corresponding to the pressing block inclined surface 21 and an apparatus opening 31 protruding from the center of the front surface, The operation block spring groove 32 is formed at the center of the operation block inclined face 34 and the cutout groove 33 is formed in the center of the operation block inclined face 34 in the same manner as the press block spring groove 23 and the central axis.

The lower plate 5 is coupled to the lower side of the slide body 1 and the operation block spring 7 is inserted into the operation block spring groove 32 and the device hole 31 is closed. The operation block 3 is inserted into the device groove 12 of the slide body 1 so that one end of the spring is in close contact with the side wall of the access groove 11 of the slide body 1 The pressing block spring 6 is inserted into the pressing block spring groove 23 so that the end of the pressing block spring 6 is brought into close contact with the upper surface of the lower plate 5 so that the pressing block 2 is inserted into the device groove The pressing block spring 6 is positioned through the cutting groove 33 formed in the working block inclined surface 34 and the pressing block 2 is pressed against the uncompressed pressing block spring 6 When the upper plate 4 is engaged with the slide body 1, the pressing block spring 6 is compressed, The protrusion 22 of the lock 2 is brought into close contact with the outer surface of the operating groove 41 of the upper plate 4 so that the amount of protrusion of the pressing protrusion 24 toward the upper side of the upper plate 4 is limited, The upper plate 4 and the slide body 1 are engaged and the press block inclined surface 21 and the operation block inclined surface 34 are also in close contact with each other,

As described above, in order to install the pressing block 2 and the actuating block 3 in the device groove 12 of the slide body 1, when the slide body 1 is opened only at either the upper side or the lower side, Any one of the upper plate 4 and the lower plate 5 may be integrally formed with the slide body 1. [

The present invention as described above is such that when the press block 2 is pressed down and lowered, the operation block 3 is advanced by the inclined amount of the press block inclined surface 21 and the operation block inclined surface 34, (Not shown) is coupled to an apparatus tool 31 integrally formed with the undercut core 3, the position of the undercut core is moved.

Therefore, the slide body 1 is mounted on the fixed mold of the injection mold so that the movable mold presses the pressing protrusion 24 by the closing operation of the movable mold, so that the pressing block 2 and the actuating block 3 operate. Conversely, The pressing block 2 and the actuating block 3 are restored to their original state by the press block spring 6 and the actuating block spring 7 which are respectively provided by releasing the pressing force of the pressing protrusion 24 by the opening operation of the mold .

1: slide body 11: access groove
12: Device housing 2: Press block
21: press block inclined surface 22:
23: pressing block spring groove 24: pressing projection
3: Operation block 31: Device holder
32: actuating block spring groove 33: incision groove
34: operating block slope 4: top plate
41: Operation groove 5: Lower plate

Claims

The inclined surfaces of the press block 2 slide on the inclined surfaces 34 of the press block 2 when the press block 2 is brought into contact with the inclined surfaces of the actuating block 3 and the press block 2 is lowered inside the slide body 1 And the actuating block (3) is retracted when the actuating block (3) advances and the pressurization block (2) rises, characterized in that:
The slide body 1 includes a top plate 4 and a bottom plate 5 having upper and lower openings and an access groove 11 formed at the front and having operating grooves 41, And the upper portion is formed as a pressing protrusion 24 and the pressing block spring groove 23 is formed on the lower surface of the central portion along the vertical center of the pressing block 2, The lower block 5 and the pressing block 2 of the slide body 1 are pressed by the pressing block spring 6 so that the lower block 5 of the slide body 1 is elastically pressed by the pressing block spring 6, And the lower surface of the upper plate 4 is in close contact with the lower surface of the slide block body 1 to prevent the slide block body 1 from being separated from the slide block body 1,
The back surface is formed with an operation block inclined surface 34 corresponding to the pressurized block inclined surface 21 and an apparatus opening 31 protruding from the center of the front surface and an operation block spring groove 32 is formed on both sides of the apparatus opening 31 And the operation block spring 7 is elastically inserted between the inner surface of the front side of the device groove 12 of the slide body so that the press block 2 and the operation block 3 are installed in the slide body 1, And returning to the original state by the spring (6) and the operating block spring (7).

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