KR200172310Y1 - Ejecter plate pre-receding device for injection molder - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

The present invention relates to an injection mold, and more particularly to a premature retracting device for retracting the mill plate to its original position after taking out the product.

I. The technical problem that the invention is trying to solve.

It is an object of the present invention to provide an injection mold mill retracting device which enables the mill sheet to retreat precisely to the original position.

All. The gist of the solution of the invention.

The present invention is characterized in that in the injection mold, by installing a gas spring inside the injection mold to prevent the breakage of the injection mold components by early retreating the mill plate.

la. Important uses of the devise.

The present invention is used in injection molds.

Description

Premature Retracting Device for Injection Molding {EJECTER PLATE PRE-RECEDING DEVICE FOR INJECTION MOLDER}

The present invention relates to an injection mold, and more particularly to a premature retracting device for retracting the mill plate to its original position after taking out the product.

1 is a cross-sectional view showing an injection mold according to an embodiment of the prior art. For reference, the part shown separated by a dashed line on the right side of FIGS. 1 and 2 is located inside the safety pin 54 and the back of the spring 56 and is not shown on the same surface.

Conventionally, as shown in FIG. 1, the injection mold includes an upper fixing plate 10, a supporting plate 20 installed below the upper fixing plate, an upper plate 30 installed below the supporting plate, and an inner side of the upper plate. The upper core 32, the lower plate 40 provided below the upper plate, and the lower core 42 in contact with the upper core inside the lower plate to form a molding space of the product, and the upper core And one side of the lower core is mounted with a slide core 34, the slide pin 36 is installed.

In addition, a space block 50 provided below the lower plate 40, a pin support plate 60 provided below the space block, a wheat plate 70 provided below the pin support plate, and a lower side of the wheat plate. The fixing plate 80 is installed.

On the other hand, the inner side of the lower core 42 is provided with a first inclined mill pin 44 and a second inclined mill pin 52 to support the bottom surface of the lower plate and the upper end of the product, the lower plate 40 And the inner side of the space block 50, the lower end is supported on a mill plate and the upper end is a safety pin 54 for supporting the bottom of the upper plate, and the safety pin is a spring so that the end is respectively supported on the inner upper surface of the lower plate and the upper surface of the pin support plate 56 is installed.

In addition, inside the lower plate 40 and the space block 50, an upper end is supported on the lower surface of the upper plate and the lower end is provided with a milpin bush 62, the upper surface of the mill plate, the upper end inside the milpin bush The plate pin 64 supported by this upper fixing plate is provided.

Figure 2 is a cross-sectional view showing a state in which the injection mold mold according to the embodiment of the prior art.

Referring to Figure 2 describes the operation of the conventional injection mold as follows. The injection mold is mounted in an injection molding machine, which is a separate large apparatus, and the injection molding machine includes a takeout bar 72 that can move back and forth to drive a compact plate of the injection mold. When the shaping of the plate product 90 is completed, the safety pin 54 and the plate pin 64 separates the upper plate 30 and the lower plate 40, and the ejection rod 72 of the injection machine is the plate 70. Push it out. At this time, the slide core 34 is pushed out by the slide pin 36, the first inclined mill pin 44 and the second inclined mill pin 52 push the product 90 upward. On the other hand, the spring 56 inserted into the safety pin 54 is compressed due to the rise of the mill plate (70).

When the ejection rod 72 of the injection machine is retracted after the extraction of the product is finished, the pressing plate 70 is retracted by a predetermined distance by the restoring force of the compressed spring 56, and the remaining residual retraction distance is the plate retraction device installed at one side of the injection mold. The lower end of the plate pin 64 pushes the upper end of the pin plate bush 62 so that the plate 70 is retracted to its original position.

At this time, the wheat plate 70 does not completely retreat to its original position due to the interference between the various mill pins and the inclined mill pins installed in the injection mold, the slide core 34 is the first inclined mill pin ( The first inclined mill pin 44 is damaged by hitting 44). That is, if the back plate 70 is not normally retracted, the first inclined mill pin 44 is raised in a state where the slide core 34 does not fall outwards, so that the slide core 34 side end and the first slope are inclined. Milpin 44 is to hit the top damage.

When the molding is completed as described above, since the mill plate must be retracted to the original position for the next molding, the spring plate is installed on the upper side of the mill plate for smooth retreat of the mill plate, and the mill plate pin and the plate retracting device to assist the spring. Although the Milpin Bush is additionally installed, the number of parts for the retraction of the Mill Plate, such as the Mill Pin and the Mill Pin Bush, increases the risk of failure and damage. There was a problem.

In order to solve the above problems, an object of the present invention is to provide an early mold retracting apparatus for an injection mold, which enables the mill finished molding in the injection mold to be retracted correctly to the original position for the next molding.

Another object of the present invention is to provide a compact sheet retracting device of an injection mold for reducing the risk of failure and breakage by simplifying the structure for the sheet retracting.

In order to achieve the above object, the present invention has a upper plate, an upper core inside the upper plate, a lower plate installed on the lower side of the upper plate, and an inner side of the lower plate in contact with the upper core molding of the product. A lower core forming a space, a slide core provided with a slide pin is mounted on one side of the upper core and the lower core, a space block provided on the lower side of the lower plate, and a compact plate provided on the lower side of the space block. Inside the lower core, a lower end is supported on a mill plate, and an upper end is provided with a first inclined mill pin and a second inclined mill pin, which supports a lower surface of the product. In the injection mold provided with a safety pin for supporting the bottom of the upper plate,

Inside the lower plate and the space block, the upper end is supported on the upper surface of the groove formed on the inner side of the lower plate and the lower end penetrates the upper surface of the mill plate and is fixed by bolts and a plurality of fixing bolts are attached to the fixing piece. By inserting the gas spring coupled to the tab plate is provided with a mill provides an early mold retracting device of the injection mold, characterized in that the installation.

1 is a cross-sectional view showing an injection mold according to an embodiment of the prior art,

Figure 2 is a cross-sectional configuration showing a state that the injection mold mold according to the embodiment of the prior art,

Figure 3 is a cross-sectional view showing an injection mold with a compact plate early retractor according to a preferred embodiment of the present invention,

Figure 4 is a cross-sectional view showing a state in which the injection mold with a mill early retracting device is opened.

<Explanation of symbols for the main parts of the drawings>

70: plate 80: fixed plate

90: molded article 100: gas spring

102: fixing plate 104: fixing bolt

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention relates to an injection mold, and more particularly to a premature retracting device for retracting the mill plate to its original position after taking out the product.

Figure 3 is a cross-sectional view showing an injection mold with a compact plate early retractor according to a preferred embodiment of the present invention.

As shown in FIG. 3, the injection mold of the present invention includes an upper fixing plate 10, a supporting plate 20 installed on the lower side of the upper fixing plate, a upper plate 30 installed on the lower side of the supporting plate, and the upper plate. An inner side core 32, a lower plate 40 disposed below the upper plate, and a lower core 42 inside the lower plate in contact with the upper core to form a molding space of the product 90; On one side of the upper core and the lower core, a slide core (34) provided with a slide pin (36) is mounted.

In addition, a space block 50 provided below the lower plate, a pin support plate 60 provided below the space block, a mill plate 70 provided below the pin support plate, and a fixed plate below the plate. 80 is installed.

On the other hand, the inner side of the lower core 42 is provided with a first inclined mill pin 44 and a second inclined mill pin 52 supporting the lower surface of the lower plate and the upper end of the product, the lower plate and the space block The inner side of the lower end is supported on a mill plate and the upper end is provided with a safety pin 54 for supporting the bottom of the upper plate.

In particular, the inner surface of the lower plate 40 and the space block 50, the upper end is supported on the upper surface of the groove formed on the inner side of the lower plate 40, the lower end penetrates through the upper surface of the mill plate 70 The gas spring 100 is installed in close contact with the gas spring. A fixing piece 102 fixed by a plurality of bolts is attached to a lower end of the gas spring 100, and the fixing plate 102 is fastened by fastening a plurality of fixing bolts 104 to the fixing piece 70 and the gas spring. Join the fixing piece of.

Figure 4 is a cross-sectional view showing a state in which the injection mold with a compact plate early retracting device is opened.

As shown in FIG. 4, when the molding of the product 90 is performed, the safety pin 54 separates the upper plate 30 and the lower plate 40, and the ejection rod 72 of the injection molding machine forms the contact plate 70. Push out. At this time, the slide core 34 is pushed out by the slide pin 36, the first inclined mill pin 44 and the second inclined mill pin 52 push the product 90 upward. At this time, the gas spring 100 is compressed by the length a in FIG.

When the ejection rod 72 of the injection molding machine is retracted after the extraction of the product, the gas spring 100 retreats the abutment plate 70 by the above-described a length toward the fixed plate by the internal expansion force. At this time, the early retraction timing of the close plate is made by adjusting the expansion operation timing of the gas spring.

Therefore, the mill pin and the inclined mill pin supported on the mill plate can be safely retracted without being damaged by the slide core, and the injection mold of the present invention maintains a state in which the next product can be molded.

As described above, the mold early retracting device of the injection mold according to the embodiment of the present invention is a simple structure without a separate mechanical device by early retracting the mill plate to its original position, risk of failure and breakage of the components constituting the injection mold This reduces the effect. In other words, the conventional early retraction device consisting of the plate and the plate bush has a high risk of malfunction due to the use of a number of mechanical parts, such as the plate is not properly retracted due to mutual friction surface damage between the plate and the plate bush, but using a gas spring Early plate retracting device of the present invention is because the plate early retreat is made by a single module called a gas spring, the risk of malfunction is low, and the early retreat control is also effective.

Claims (1)

An upper core, an upper core inside the upper plate, a lower plate provided below the upper plate, a lower core in contact with the upper core inside the lower plate to form a molding space of the product, and an upper core One side of the lower core and the slide core is provided with a slide pin is installed, the space block is installed on the lower side of the lower plate, and the lower plate is installed on the lower side of the space block, the lower core is supported on the inner side of the lower plate The top is the first inclined mill pin and the second inclined mill pin to support the bottom of the product is installed, the lower plate and the inner space of the space block is supported by the lower plate and the upper end of the safety pin is installed to support the bottom of the upper plate In the mold, Inside the lower plate and the space block, the upper end is supported on the upper surface of the groove formed on the inner side of the lower plate and the lower end penetrates the upper surface of the mill plate and is fixed by bolts and a plurality of fixing bolts are attached to the fixing piece. Early retraction device of the injection mold of the injection mold, characterized in that the gas spring is coupled to the tabbed mill by inserting is installed.