KR101196521B1 - Apparatus for actuating slide in injection molding - Google Patents

Abstract

The present invention provides to operate sequentially by configuring a plurality of slides in the injection mold.

The slide driving device of the injection mold of the present invention comprises a main slide core as a first slide and a second slide core in the first slide core in an injection mold having different under cut lengths and different slide cores. The moving angle formed in relation to the second slide core in which a portion of the predetermined undercut is formed is greater than the moving angle formed in relation to the first slide core on which the second slide core is mounted, so that the mold is opened when the mold is opened. By allowing the second slide core to be operated first, by allowing the slide core to be separated and operated according to the shape of the undercut, there is no need to install a separate take-out device, simplifying the mold structure, and lowering the manufacturing cost.

Injection mold, slide, undercut, moving angle

Description

Slide driving device in injection mold {Apparatus for actuating slide in injection molding}

 1 is a view showing a conventional long undercut slide drive device

 2 is a view showing a conventional long undercut take-out structure

 3A is an assembled sectional view of a plurality of slide driving apparatus of the present invention.

 Figure 3b is a plan view showing the movable side core and the primary and secondary slide in Figure 3a

 Figure 3c shows that the mold is open, the slide core is completely removed from the product

 4 is another embodiment in which the slide operation of the present invention is performed by a cam block;

 5 is an embodiment showing that the operation of the secondary slide core to operate by the inclined pin rather than the spring

The present invention relates to a sequence of driving a plurality of slides of an injection mold, and when using a slide core to form an undercut of a product, a main slide core which is a first slide and a second slide core in the first slide core And a second slide core in which a part of the undercut is formed when the mold is opened after the molding is completed, is operated first.

Hereinafter, the related art and related inventions will be described.

First, the undercut in the injection mold described in the present invention is a request portion of a mold or a molded article having difficulty in removing the molded article from the mold, and refers to a molded article perpendicular to the mold opening direction or a vertical mold to the molded article. .

1 is a view showing a conventional long undercut slide drive device.

Referring to FIG. 1, a slide driving method using a hydraulic cylinder used when a length of a general undercut in an injection molding die is long is illustrated.

1 is a structure in which the slide core 14 is operated by the hydraulic cylinder 17 when the length L1 18 of the undercut in the product 13 is longer than that of the general product. When opened based on (16), the slide core 14 is separated from the product 13 by the hydraulic cylinder.

At this time, the length L1 (18) of the undercut is long, and the shape of the product 13 is attracted to the slide core 14 to cause deformation of the shape itself.

FIG. 2 is a view showing a conventional long undercut take-out structure, and the description of the drawings and reference numerals of FIG. 1 will be omitted.

Referring to FIG. 2, the slide core 14 is operated by the inclined pins 21, installs the slide pins mill pins 22 to push the product 13, and the hydraulic cylinders 11 for the operation of the pins. ) Is installed structure.

However, in the conventional long undercut slide drive device as described above, when the undercut of the product is long (L1) 18, the undercut shape itself slides when the slide core 14 is separated by the hydraulic cylinder 17. Dragged to the core 14, the product 13 deforms from its original shape.

Therefore, in order to prevent the deformation, maintenance is difficult by additionally installing additional devices.

In addition, the cost of the mold increases due to the addition of the auxiliary device, and the auxiliary device must be operated after the mold is opened in addition to the opening and closing movement of the mold, thereby increasing the molding cycle time during mass production, thereby reducing productivity.

The present invention proposes that the slide core related to the undercut is operated first when the length of the undercut is long in the injection mold by configuring a plurality of slide cores.

Of the plurality of first and second slide cores of the present invention, a part of the long undercut of the shape of the undercut of the product is formed in the second slide core, and the second large moving angle is formed around the axis in which the mold is opened and closed. It is suggested that the slide core be operated first.

The slide driving device of the injection mold of the present invention comprises a main slide core which is a first slide and a second slide core in the first slide core in an injection mold having different undercut lengths and different slide cores. In response to the shape of the undercut, the slide core is selectively operated.

In one embodiment of the present invention, the movement angle formed in relation to the second slide core in which a portion of the predetermined undercut is formed is greater than the movement angle formed in relation to the first slide core in which the second slider core is mounted. The second slide core is operated first when the mold is opened.

In addition, as an embodiment of the present invention, the injection mold structure, the second slide core to form a predetermined undercut portion; A first slide core for mounting the two slider cores; Means for actuating the first and second slide cores; And locking means for preventing the retraction of the first and second slide cores, wherein the second slide movement angle formed based on the opening and closing direction of the mold is greater than the first slide movement angle and opened in the mold. The second slide is first released from the product.

Hereinafter, a preferred embodiment of a slide driving device in the injection mold of the present invention will be described in detail with reference to the accompanying drawings.

3A is an assembled sectional view of a plurality of slide drive devices of the present invention.

Referring to FIG. 3A, a product 33 having a long (L1) 38 undercut, a movable side core 32 forming an inner surface of the product, and a fixed side core forming an outer surface ( 31), the secondary slide core 35 forming the long undercut (L1) 38, the spring 44 for operating the secondary slide core, the guide rail for guiding the operation of the secondary slide core (B) of FIG. 3B, it is comprised by the main slide core 34 which is a primary slide core which mounts the said secondary slide core, and locks for the prevention of retreat of the said 1st and 2nd slide cores 34 and 35. FIG. Block 1 (41) and locking block (2) 42, and the inclined pin 43 for operating the main slide core 34 when the mold is opened.

In FIG. 3A, at each of the A 45 and B 46 corresponding to the length L1 38 of the long undercut and the maximum undercut length L2 39 respectively, the secondary when the mold is opened In order to make the slide core 35 operate faster than the main slide core 34, it is configured at different values of angle (angle A> B).

 In addition, when the mold is closed, the locking block 1 (41) and the locking block 2 (42) prevent the retraction of the slide core, and molding is performed in this state.

In FIG. 3A, each A 45 is an angle for advancing the secondary slide core 35 forward with respect to the vertical direction 47 in which the mold is opened and closed, and each B 46 is the main slide core 34. Represents a distance moving along the inclined pin 43.

FIG. 3B is a plan view showing the movable core 32 and the primary and secondary slide parts 34 and 35 in FIG. 3A.

Referring to FIG. 3B, a spring 44 for operating the secondary slide core 35 and the secondary slide core, a guide rail 48 for guiding the operation of the secondary slide core, and the secondary slide core It consists of the main slide core 34 to attach.

3C shows that the mold is open and the slide core is completely released from the product 33.

Referring to FIG. 3C, the locking block 1 45 and the locking block 2 42 which have restrained the slide core when the mold is opened are evacuated, and the secondary slide core 35 is L3 by the spring 44. It is moved by the length of 52, the main slide core 34 is moved by the length of the L4 (48) by the inclined pin 43.

Since the inclination angle A 45 is larger than the inclination angle B 46 at this time, the secondary slide core 35 moves faster by the length of the L3 52 than the main slide core 34 by the force of the spring 44. The main slide core 34 is moved by the length of the L4 48 by the inclined pin 43 so that the product 33 can be taken out of the mold. It becomes a state.

After the product 33 is removed from the mold by a milpin (not shown), when the mold is closed by an injection molding machine, the secondary slide core is advanced by the inclined surface of the locking block-1, and the main slide core is It is advanced by the inclined pin.

When it is completely closed, the locking block-1 and the locking block-2 are brought into close contact with the slide core to prevent retreat and are ready to be remolded.

4 is another embodiment in which the slide operation of the present invention is performed by a cam block.

Referring to FIG. 4, in the order in which the main slide core 34 and the secondary slide core 35 are separated from the product 33, the cam block 49 is mechanically operated, regardless of the difference in the inclination angle A / B. This is to move differently by a certain distance.

FIG. 5 is an exemplary view illustrating the operation of the secondary slide core 35 by the inclined pin 51 rather than the spring (50 of FIG. 4).

As described above, the present invention provides a main slide core which is a first slide and a second slide core in the first slide core when a slide core is used to form an undercut of a product in a plurality of slide driving sequences. And a second slide core in which a part of the undercut is formed when the mold is opened after the molding is completed, is operated first.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents.

It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Therefore, the above description is not limited to the scope of the present invention by the limitation of the claims.

As described above, the slide drive device in a general injection mold has a complicated shape or a deep undercut on the outer wall of the product. It should have been implemented.

However, the slide drive device in the injection mold according to the present invention allows the slide core to be separated and operated according to the shape of the undercut, thereby eliminating the need for a separate take-out device, and simplifying the mold structure, resulting in low manufacturing costs. .

In addition, there is less risk of mold breakage in the molding process and easier maintenance.

In addition, it is possible to increase the flexibility of the design because it is not necessary to give more than the draft to the product design problem due to the mold implementation problem.

Claims (3)

In the slide drive device in the injection mold is composed of different undercut length and different slide core, A first slide core that is a main slide core; And A second slide core configured in the first slide core, The first slide core or the second slide core is operated to correspond to the shape of the under cut, The moving angle formed in relation to the second slide core in which a portion of the predetermined undercut is formed is larger than the moving angle formed in relation to the first slide core on which the second slider core is mounted, so that the second when the mold is opened. Slide driving device in the injection mold, characterized in that the slide core is operated first. In the slide drive device in the injection mold is composed of different undercut length and different slide core, A second slide core for forming a predetermined undercut; A first slide core for mounting the two slider cores; Means for actuating the first and second slide cores; And Locking means for preventing the retraction of the 1,2 slide core, The first slide core or the second slide core is operated in correspondence with the shape of the under cut, In the injection mold, the second slide movement angle formed based on the opening and closing direction of the mold is larger than the first slide movement angle, so that the second slide is first released from the product when the mold is opened. Slide drive. delete

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