CN216001206U - Telescoping device and double-color mold - Google Patents

Abstract

The utility model discloses a telescopic device and a double-color mold comprising the same, and belongs to the technical field of molds. A telescopic device comprising: the bottom plate of the double-color mold is provided with a medium channel for externally connecting a power medium and an object placing cavity formed on the bottom plate, and the object placing cavity is communicated with the medium channel; the ejector rod is arranged in the storage cavity in a sliding manner and slides through a power medium; wherein, the ejector pin including: an abutting part for abutting against the insert; and a sliding part for sliding in the placing cavity. During injection molding operation, the ejector rod can penetrate through the first insert and abut against the lower end face of the second insert, so that the designed mold cannot generate the color cross problem; in addition, the structure of the die is improved, so that the change of the die is reduced, the mode of moving in the die is formed, various power equipment does not need to be customized, and the structure is more stable and efficient.

Description

Telescoping device and double-color mold

Technical Field

The utility model belongs to the technical field of dies, and particularly relates to a telescopic device and a double-color die comprising the same.

Background

At present, the existing double-color mold is bound to undergo the process of twice injection molding. Therefore, the problem that color master batches cannot be mixed during twice injection molding needs to be solved. A telescopic mechanism is therefore required to separate the two different mould cavities.

The existing telescopic mechanism adopts a dovetail to be provided with an inclined plane, and the telescopic mechanism realizes telescopic action by changing the relative position of the inclined plane, and the scheme has the defect of poor stability. The other type is realized by utilizing an ejection mechanism of the existing mold, but the ejection rod has large pressure and strong impact force by adopting the scheme, and the insert is easy to damage due to long-term collision with the insert.

For example, the Chinese patent has the following patent numbers: 2019108306728, which discloses a double-color injection molding die and its operation method; the mode through external hydro-cylinder realizes the separation to different mold inserts, but the incidental part of this kind of mode is many, and each part of pneumatic cylinder all is external to be processed a lot of recesses on the mould, more seems heavy promptly and the structure is complicated, and mould area is big again.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a telescopic device integrated on a mould and a double-color mould containing the telescopic device.

The purpose of the utility model is realized as follows: the utility model provides a telescoping device for use withstands the mold insert in double-color mold, including:

the bottom plate of the double-color mold is provided with a medium channel for externally connecting a power medium and an object placing cavity formed on the bottom plate, and the object placing cavity is communicated with the medium channel; and

the ejector rod is arranged in the storage cavity in a sliding manner and realizes sliding through a power medium;

wherein, the ejector pin including:

an abutting part for abutting against the insert; and

a sliding part for sliding in the placing cavity.

Preferably, the medium channel comprises a lower channel, and the lower channel is communicated with the object placing cavity;

the sliding part at least comprises:

the sealing section is positioned in the object placing cavity and is in sealing connection with the inner side wall of the object placing cavity; and

and the ascending pressure-bearing section is positioned at the lower side of the sealing section, is communicated with the lower layer channel and is used for pressing the sliding part to slide upwards after the power medium enters the storage cavity through the lower layer channel.

Preferably, dispose the sliding sleeve between thing chamber and the ejector pin, the ejector pin slides in the sliding sleeve.

Preferably, a plurality of inlet grooves are formed at the lower end of the sliding sleeve and communicated with the lower-layer channel; and the power medium sequentially enters the sliding sleeve through the lower-layer channel and the inlet groove and is pressed on the upstream pressure-bearing section.

Preferably, the middle part shaping of sliding sleeve has first seal groove, the sliding sleeve with put and dispose first sealing washer between the thing chamber, first sealing washer configuration is in first seal groove.

Preferably, the medium channel further comprises an upper channel, and the upper channel and the lower channel are both communicated with the storage cavity;

the sliding part also comprises:

and the descending pressure-bearing section is positioned at the upper end of the sliding part, is communicated with the upper layer channel and is used for pressing the sliding part to slide downwards when the power medium enters the storage cavity through the upper layer channel.

Preferably, a flow guide hole is formed in the side wall of the upper end of the sliding sleeve and communicated with the upper-layer channel.

Preferably, the limiting block is provided with a through hole for the abutting part to pass through and realize relative sliding;

a counter sink type connecting end face is formed at the upper end of the article placing cavity;

the limiting block is fixedly connected with the connecting end face.

Preferably, the stopper has:

a second sealing ring is arranged between the lower end face of the connecting section and the connecting end face; and

the sealing section is located the downside of linkage segment, just the sealing section at least part stretches into put the thing intracavity, the shaping of sealing section lateral wall has the third seal groove, the sealing section with put and dispose the third sealing washer between the thing chamber, the configuration of third sealing washer is in the third seal groove.

A double-color mold is formed by injecting molten plastic into a cavity and cooling the molten plastic, and comprises the telescopic device and further comprises:

the secondary injection assembly is provided with glue runners which are longitudinally configured, and the number of the glue runners is twice of that of the cavities; the glue flow channel comprises a side flow channel right opposite to the side edge of the cavity and a main flow channel right opposite to the center of the cavity;

the secondary molding assembly is opposite to the secondary injection assembly, and at least one cavity is formed between the secondary molding assembly and the secondary injection assembly;

the first insert is positioned in the cavity and corresponds to the side runner and is used for enabling the plastic to form the outer side of the product; the first insert is provided with a first ejection channel for ejecting the ejector rod;

and; the second insert is positioned in the first insert, corresponds to the main runner and is used for enabling the plastic to form the inner side of the product;

wherein the overmolding has at least:

the male die core is provided with a second ejection channel for ejecting the ejector rod; and

the bottom plate is provided with an object placing cavity, and the ejector rod is arranged in the object placing cavity, the first ejection channel and the second ejection channel in a sliding mode.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:

1. during injection molding operation, the ejector rod can penetrate through the first insert and abut against the lower end face of the second insert, so that the designed mold cannot generate the color cross problem; in addition, the technical scheme of the utility model is that the structure of the die is improved, so that the change of the die is reduced, and a mode of moving in the die is formed. And a plurality of power devices do not need to be additionally customized, so that the structure is more stable and efficient.

2. The manufacture of both monochrome and bicolor products in practical use can be achieved universally. That is to say when the ejector pin does not withstand the second mold insert, just can be applicable to the production of monochromatic product, the commonality is higher.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at C;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 6 is a top view of the present invention;

FIG. 7 is a cross-sectional view taken along line D-D of FIG. 6;

FIG. 8 is a perspective view of the base plate and the telescoping device;

FIG. 9 is a perspective view of FIG. 8 after the bottom panel has been hidden;

FIG. 10 is a top view of FIG. 9;

FIG. 11 is a cross-sectional view taken along line E-E of FIG. 10;

FIG. 12 is a perspective view of the jack;

FIG. 13 is a perspective view of the sliding sleeve; and

fig. 14 is a perspective view of a product of the natural color mold.

In the figure: 1-a bottom plate; 2-a top rod; 3, sliding sleeve; 4-a limiting block; 11-a storage cavity; 12-lower level channels; 13-upper level channels; 14-a connecting end face; 15-a second seal groove; 21-an abutment; 22-a sliding part; 31-an inlet slot; 32-a first seal groove; 33-diversion holes; 41-perforating; 42-a connecting segment; 43-an extension section; 44-a third seal groove; 100-a telescopic device; 221-a sealing section; 222-an upstream pressure-bearing section; 223-a fourth seal groove; 224-a downstream pressure-bearing section; 300-a secondary injection assembly; 301-side flow channel; 302-a primary runner; 400-overmolding the component; 401-core insert; 402-a second ejection channel; 500-a first insert; 501-a first ejection channel; 600-second insert.

Detailed Description

The utility model is further described below in terms of specific examples.

[ EXAMPLES one ]

As shown in fig. 1-14, a two-color mold is formed by injecting molten plastic into a cavity and cooling to form a finished product; in this embodiment, the structure of the two-color mold is illustrated by using a cup cover for making two-color milk tea as a finished product.

The double-color mold comprises:

a secondary injection assembly 300 having longitudinally arranged glue flow channels, the number of which is twice the number of cavities; a side runner 301 opposite to the side position of the cavity and a main runner 302 opposite to the center position of the cavity are also arranged; as shown in fig. 8, in the present embodiment, the number of cavities is eight, and the number of corresponding glue flow channels is sixteen. Of course, the number of cavities can be customized according to actual needs, and the number of the embodiment is only used for illustration.

Also includes: an injection molding assembly 400 disposed opposite to the injection molding assembly 300 and forming at least one cavity with the injection molding assembly 300; in this embodiment eight cavities.

Also includes: the first insert 500 is positioned in the cavity corresponding to the side runner 301 and used for enabling the plastic to form the outer side of a product after the plastic is cooled; the first insert 500 is provided with a first ejection channel 501 for ejecting the ejector rod 2;

and a second insert 600, located in the first insert 500, corresponding to the sprue 302, for enabling the plastic to form the inside of the product after the plastic is cooled.

In the existing two-color mold, the conventional steps are:

the method comprises the following steps: the plastic in a molten state passes through the side runner 301 and the first insert 500, thereby forming the periphery of the product in the peripheral portion of the cavity. I.e. as shown in fig. 14, forming part of the cup rim 5 in this figure.

Step two: the plastic in the molten state will pass through sprue 302 and second insert 600, thereby initially forming a central portion of the product in the central portion of the mold cavity. I.e. as shown in fig. 14, forms part of the top cover 6 in this figure.

The two parts are combined together to form the double-color milky tea cup cover. However, in step one, it is necessary to ensure that the plastic does not enter the central part of the cavity, otherwise it will mix with the plastic in step two, causing color cross-color of the two colors.

In practice, therefore, in step one, it is desirable to have a telescoping device 100 that can be held against the second insert 600 during the first shot so that the two shots of plastic do not cross one another.

In order to realize the function of the telescopic device 100, in this embodiment, the secondary molding assembly 400 at least includes:

a core insert 401 having a second ejecting passage 402 for ejecting the ejector rod 2; and

the base plate 1 has a storage chamber 11, and the rod 2 is slidably disposed in the storage chamber 11, the first ejection passage 501, and the second ejection passage 402.

That is, in the present embodiment, on the basis of the original mold, a path for the ejector rod 2 to pass through the second ejection channel 402 from the storage cavity 11 to the first ejection channel 501 is directly formed in the core 401 and the bottom plate 1 of the existing mold. Therefore, during the injection molding operation in the first step, the ejector rod 2 can penetrate through the first insert 500 to abut against the lower end surface of the second insert 600, and the designed mold cannot generate the color cross problem; in addition, the technical scheme of the embodiment is that the structure of the mold is improved, so that the change of the mold is reduced, and a mode of moving in the mold is formed. And a plurality of power devices do not need to be additionally customized, so that the structure is more stable and efficient.

A further technical effect is that, by virtue of this design, both monochrome and two-colour products can be produced in common use. That is to say when ejector pin 2 does not withstand second mold insert 600, just can be applicable to the production of monochromatic product, the commonality is higher.

That is to say, original enterprise can be through reforming transform current monochromatic mould's bottom plate 1 and core insert 401 to can realize the double-colored mould of this embodiment, need not additionally to repel the huge capital again and buy new double-colored mould alone. And the reformed double-color mold can still adapt to the production requirement of the single-color mold.

The power setting scheme that enables the ram 2 to move is described in detail below.

In this embodiment, a telescopic device 100 is used for propping up an insert in a two-color mold, and includes:

the bottom plate 1 of the double-color mold is provided with a medium channel for externally connecting a power medium, and an object placing cavity 11 formed on the bottom plate 1, wherein the object placing cavity 11 is communicated with the medium channel.

Another advantage of this embodiment is that it is compatible with multiple power media, for example, the power media may be gas or liquid. The scheme corresponding to the power can be pneumatic or hydraulic driving, so that the double-color mold of the embodiment is more flexible and has stronger universality.

In this embodiment, of course, the number of media channels is at least two times greater than or equal to the number of cavities. Through will putting thing chamber 11 and medium channel intercommunication to can realize changing the pressure value of putting in the thing chamber 11.

The telescopic device 100 of the present embodiment further includes a top rod 2 slidably disposed in the storage cavity 11 and sliding through a power medium; the sliding is realized by the pressure change of the power medium in the object placing cavity 11, and then the push rod 2 is driven to slide in the object placing cavity 11.

Wherein, ejector pin 2 including:

an abutment 21 for abutting against an insert, here referred to as second insert 600 in the present embodiment; of course, depending on the design requirements, it may be possible to hold first insert 500.

The top bar 2 also comprises a sliding part 22 which is used for sliding in the object placing cavity 11. The second insert 600 is finally abutted by the driving slide 22 moving to drive the abutting portion 21 to move synchronously.

As shown in fig. 4, the following further describes the specific scheme for driving the ram 2: the medium channel comprises a lower layer channel 12, and the lower layer channel 12 is communicated with the object placing cavity 11, so that high-pressure power medium can enter the object placing cavity 11;

the sliding portion 22 includes at least:

the sealing section 221 is positioned in the object placing cavity 11 and is in sealing connection with the inner side wall of the object placing cavity 11, so that the power medium does not leak out, and the object placing cavity 11 is kept in a high-pressure state; as shown in fig. 4, the middle of the sealing segment 221 has a fourth sealing groove 223, and a fourth sealing ring is disposed in the fourth sealing groove 223 for realizing a sealing connection.

And the upward pressure-bearing section 222 is located at the lower side of the sealing section 221, and is communicated with the lower passage 12, that is, after the power medium enters the storage cavity 11 through the lower passage 12, the power medium presses the upward pressure-bearing section 222, and then the sliding part 22 is pushed to slide upward.

Particularly, as shown in fig. 3 and 5, by cutting from different positions, it is specifically shown that the object placing cavity 11 on the base 1 is respectively provided with a lower layer channel 12 and an upper layer channel 13, so that the pressing effect on the push rod in two directions can be realized.

As shown in fig. 11 and 12, for better bearing pressure, the upward pressure-bearing section 222 is configured in a circular truncated cone shape with a large upper end and a small lower end, so that the smaller lower end can accommodate more power medium, and the sliding part 22 can be pushed to slide more easily.

As for the practical use of such a design, how to lower and reset the carrier rod 2 is achieved in this embodiment by the pressure in the cavity falling and resetting when the plastic in the molten state enters the second insert 600 through the main runner 302.

Correspondingly, in practical use, the control system is matched and controls the ejection timing of the ejector rod 2 and the pressure applied to the second insert 600 by controlling parameters such as the timing of entering the power medium, the flow rate and the like. Preferably, the timing of the plastic entering the main runner 302 and the side runner 301 is controlled by integration. Thereby increasing the integrity of the mould and ensuring that the quality of the product obtained by injection moulding is more stable.

In actual use, the sliding of the sliding portion 22 needs to be smooth while sealing, and therefore, if the sliding portion 22 directly slides relative to the inner wall of the storage chamber 11, the processing requirement on the inner surface of the storage chamber 11 is high. But put thing chamber 11 this thing and set up again on bottom plate 1 quantity again many, be unfavorable for developing the processing of high accuracy, design efficiency is lower and the degree of difficulty is higher moreover like this.

In order to solve the technical problem, a sliding sleeve 3 is arranged between the storage cavity 11 and the top rod 2, and the top rod 2 slides in the sliding sleeve 3. The sliding sleeve 3 can be used by simple processing after purchasing a finished product required by the composite sliding type sealing. In practice, the fixed connection between the object placing cavity 11 and the sliding sleeve 3 can be realized, so that the efficiency is greatly increased, and the difficulty is reduced.

As shown in fig. 13, in order to enable the power medium to smoothly enter the sliding sleeve 3, a plurality of inlet slots 31 are formed at the lower end of the sliding sleeve 3, and the inlet slots 31 are communicated with the lower passage 12; the power medium enters the sliding sleeve 3 through the lower passage 12 and the inlet slot 31 in sequence and presses the upstream pressure-bearing section 222.

Particularly, in the embodiment, the sliding sleeve 3 is a circular cylindrical body, and the inlet slots 31 are circumferentially arrayed at the lower end of the sliding sleeve 3, so that the power medium can enter the sliding sleeve 3 conveniently.

In order to prevent the power medium from flowing out from the sliding sleeve 3 and the space between the object placing cavity 11, a first sealing groove 32 is formed in the middle of the sliding sleeve 3, a first sealing ring is configured between the sliding sleeve 3 and the object placing cavity 11, the first sealing ring is configured in the first sealing groove 32, and the air tightness between the sliding sleeve 3 and the object placing cavity 11 is increased.

In order to improve the stability and the air tightness of the telescopic device 100, the telescopic device 100 further comprises a limiting block 4 in the embodiment, wherein the limiting block 4 is provided with a through hole 41, and the through hole 41 is used for allowing the abutting part 21 to pass through and realize relative sliding;

a counter sink type connecting end surface 14 is formed at the upper end of the article placing cavity 11;

the limiting block 4 is fixedly connected with the connecting end surface 14.

This gives the ram 2 on the one hand a certain guiding effect during sliding by means of the perforations 41. Meanwhile, the limit block 4 is located on the upper end face of the object placing cavity 11, especially, the limit block 4 is located on the upper end face of the sliding sleeve 3 as shown in fig. 4, so that the sliding sleeve 3 can be ensured to slide out of the object placing cavity 11 in long-term use, further the movement of the sliding sleeve 3 can be limited, and the stability of the telescopic device 100 and even the whole double-color mold is improved.

Next, the structure of the stopper 4 will be described in detail, and as shown in fig. 4, the stopper 4 has:

a second sealing ring is arranged between the lower end face of the connecting section 42 and the connecting end face 14, and a second sealing groove is formed on the upper surface of the connecting end face 14 at the moment, and the second sealing ring is arranged in the second sealing groove; and

the extending section 43 is located at the lower side of the connecting section 42, and the extending section 43 at least partially extends into the storage cavity 11, as shown in fig. 4 and 11, the extending section 43 also extends into the sliding sleeve 3; a third sealing groove 44 is formed in a sidewall of the protruding section 43, and a third sealing ring is disposed between the sealing section 221 and the storage cavity 11, particularly between the protruding section 43 and the sliding sleeve 3 in this embodiment, and the third sealing ring is disposed in the third sealing groove 44. Thereby preventing the power medium from flowing out of the sliding sleeve 3.

[ example two ]

The present embodiment is basically the same as the first embodiment, and the difference is: in the first embodiment, the push rod is driven to reset and is pushed to move by the pressure when the plastic main runner flows out. However, this solution has limitations and high pressure requirements. The purpose of pushing the ejector rod to move cannot be achieved; high, it is used to damage the entire telescopic mechanism.

In order to solve the above problem, as shown in fig. 11, the sliding part 22 further includes: and the descending pressure-bearing section 224 is positioned at the upper end of the sliding part 22, is communicated with the upper-layer channel 13, and is used for pressing the sliding part 22 to slide downwards when the power medium enters the storage cavity 11 through the upper-layer channel 13.

Correspondingly, the sliding sleeve 3 is communicated with the upper layer channel 13. The scheme is that a diversion hole 33 is arranged on the side wall of the upper end of the sliding sleeve 3, and the diversion hole 33 is communicated with the upper layer channel 13. Therefore, the power medium can enter the article placing cavity 11 through the upper layer channel 13, then enters the sliding sleeve 3 through the flow guide hole 33 and presses the downward pressure bearing section 224 to move downward, and then the downward sliding of the ejector rod is completed.

The timing and the flow rate of the power medium entering the upper channel 13 can be controlled, so that the timing and the descending speed of the ejector rod resetting can be controlled, and the parameters of the whole die can be controlled more.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.

Claims (10)

1. The utility model provides a telescoping device for use withstands the mold insert in double-color mold, its characterized in that, including:

the bottom plate (1) of the double-color mold is provided with a medium channel for externally connecting a power medium and an object placing cavity (11) formed on the bottom plate (1), and the object placing cavity (11) is communicated with the medium channel; and

a push rod (2) which is arranged in the object placing cavity (11) in a sliding way and realizes sliding through a power medium;

wherein, ejector pin (2) including:

an abutting portion (21) for abutting against the insert; and

a sliding part (22) used for sliding in the object placing cavity (11).

2. The telescopic device according to claim 1, wherein the medium passage comprises a lower passage (12), and the lower passage (12) is communicated with the storage chamber (11);

the sliding part (22) at least comprises:

the sealing section (221) is positioned in the object placing cavity (11) and is in sealing connection with the inner side wall of the object placing cavity (11); and

and the ascending pressure-bearing section (222) is positioned at the lower side of the sealing section (221), is communicated with the lower-layer channel (12), and is used for pressing the sliding part (22) to slide upwards after the power medium enters the storage cavity (11) through the lower-layer channel (12).

3. The telescopic device according to claim 2, wherein a sliding sleeve (3) is arranged between the storage cavity (11) and the top rod (2), and the top rod (2) slides in the sliding sleeve (3).

4. The telescopic device according to claim 3, wherein the lower end of the sliding sleeve (3) is formed with a plurality of inlet slots (31), and the inlet slots (31) are communicated with the lower layer passage (12); the power medium sequentially enters the sliding sleeve (3) through the lower layer channel (12) and the inlet groove (31) and is pressed on the upstream pressure-bearing section (222).

5. The telescopic device according to claim 3, wherein a first sealing groove (32) is formed in the middle of the sliding sleeve (3), and a first sealing ring is arranged between the sliding sleeve (3) and the storage cavity (11) and arranged in the first sealing groove (32).

6. The telescopic device according to claim 2, wherein the medium channel further comprises an upper channel (13), and the upper channel (13) and the lower channel (12) are both communicated with the storage cavity (11);

the sliding part (22) further comprises:

and the descending pressure-bearing section (224) is positioned at the upper end of the sliding part (22), is communicated with the upper-layer channel (13), and is used for pressing the sliding part (22) to slide downwards when the power medium enters the article placing cavity (11) through the upper-layer channel (13).

7. The telescopic device according to claim 3, wherein the side wall of the upper end of the sliding sleeve (3) is formed with a diversion hole (33), and the diversion hole (33) is communicated with the upper passage (13).

8. The telescopic device according to claim 1, further comprising a limiting block (4), wherein the limiting block (4) is provided with a through hole (41), and the through hole (41) is used for the abutting part (21) to pass through and realize relative sliding;

a counter sink type connecting end surface (14) is formed at the upper end of the article placing cavity (11);

the limiting block (4) is fixedly connected with the connecting end surface (14).

9. Telescopic device according to claim 8, wherein the stop block (4) has:

a second sealing ring is arranged between the lower end surface of the connecting section (42) and the connecting end surface (14); and

the stretching section (43) is located on the lower side of the connecting section (42), at least part of the stretching section (43) stretches into the object placing cavity (11), a third sealing groove (44) is formed in the side wall of the stretching section (43), a third sealing ring is arranged between the sealing section (221) and the object placing cavity (11), and the third sealing ring is arranged in the third sealing groove (44).

10. A double-color mold is formed by injecting molten plastic into a cavity and cooling to form a finished product; a telescopic device (100) according to any one of claims 1 to 9, further comprising:

a secondary injection assembly (300) having longitudinally arranged glue flow channels, the number of the glue flow channels being twice the number of the cavities; the glue flow channel comprises a side flow channel (301) opposite to the side position of the cavity and a main flow channel (302) opposite to the center position of the cavity;

an injection molding assembly (400) disposed opposite to the injection molding assembly (300) and forming at least one cavity with the injection molding assembly (300);

a first insert (500) located in the cavity in correspondence with the side runner (301) for forming the plastic into the outside of the product; the first insert (500) is provided with a first ejection channel (501) for ejecting the ejector rod (2);

and; a second insert (600) located in the first insert (500) in correspondence with the sprue (302) for forming the plastic into the inside of the product;

wherein the secondary molding assembly (400) has at least:

the male die core (401) is provided with a second ejection channel (402) for ejecting the ejector rod (2); and

and the bottom plate (1) is provided with an object placing cavity (11), and the ejector rod (2) is arranged in the object placing cavity (11), the first ejection channel (501) and the second ejection channel (402) in a sliding mode.

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