CN215550708U

CN215550708U - Injection mold core cooling system

Info

Publication number: CN215550708U
Application number: CN202121879281.4U
Authority: CN
Inventors: 廖昌斌
Original assignee: Particle Filter Technology Shanghai Co ltd
Current assignee: Particle Filter Technology Shanghai Co ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-01-18
Anticipated expiration: 2031-08-11

Abstract

The utility model provides a cooling system for a mold core of an injection mold, which comprises a power mechanism, a connecting mechanism, a support and a molding mold core, wherein the injection mold is provided with a movable mold molding ejector sleeve, an injection space is arranged in the injection mold when the injection mold is closed, one end of the molding mold core is arranged on the connecting mechanism, a mold core cavity channel in the molding mold core is communicated with a fluid flow channel in the connecting mechanism, and the other end of the fluid flow channel is connected with a fluid source; the power mechanism can drive the connecting mechanism to drive the forming mold core to move between a first position and a second position, and the other end of the forming mold core is positioned in the injection molding space and is in sealing fit with the end part of the movable mold forming ejector sleeve in the first position; when the forming mold core is arranged outside the injection mold at the second position, and fluid sequentially passes through the fluid flow channel and the mold core cavity channel when the fluid source outputs the fluid.

Description

Injection mold core cooling system

Technical Field

The utility model relates to the technical field of molds, in particular to a mold core cooling system of an injection mold.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a process used to mass produce parts of some complex shapes. Specifically, the material melted by heating is injected into a die cavity from high pressure, and a formed product is obtained after cooling and solidification. The injection mold is an important process device for producing various industrial products, and is widely applied to various industries along with the rapid development of the plastic industry and the popularization and application of plastic products in the industrial departments of aviation, aerospace, electronics, machinery, ships, automobiles and the like.

Whether the structure of the injection mold is reasonable or not determines the stability, safe operability and economy of production of one part. However, in practical applications, the shapes of the parts are various, some parts have quite complicated shapes, and the manufactured plastic products have an internal system and need to be finished by means of a forming core. In the processing operation process, the forming core can warp upwards after being heated at high temperature continuously, so that the concave-convex sealing mechanism of the forming core and the lower die ejector sleeve fails, the inner flash of a product pipeline is generated, the flash is extremely low in the detection degree of the inner wall of the pipeline, the requirements on personnel and detection are high, the cost is increased, and the quality of the product is not easy to guarantee.

Patent document CN112895328A discloses a bidirectional inclined core pulling combined slide block mechanism injection mold, which comprises a first front mold component, a second front mold component, a rear mold component, a mold core and an opening forming component, wherein the mold core comprises a front mold core arranged on the second front mold component and a rear mold core arranged on the rear mold component, and in a mold closing state, the front mold core and the rear mold core jointly enclose to form a product cavity; the opening forming component is provided with a front sliding block core for forming an opening; the second front mould component and the front mould core are provided with front inclined slideways which penetrate through to the product cavity, and the front sliding block core is slidably assembled in the front inclined slideways and is in transmission connection with the first front mould component; the mold closing or opening between the first front mold component and the second front mold component drives the front sliding block core to switch between the in-place position inserted into the product cavity and the out-of-place position separated from the product cavity, but no cooling measure is taken for the mold core in the design, so that the mold core has the possibility of deformation and influences the product quality.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a cooling system for a mold core of an injection mold.

The utility model provides a cooling system for a mold core of an injection mold, which comprises a power mechanism, a connecting mechanism, a support and a forming mold core, wherein the power mechanism is connected with the connecting mechanism;

the injection mold is provided with a movable mold forming ejector sleeve and is internally provided with an injection space when the injection mold is closed, one end of the forming mold core is arranged on the connecting mechanism, a mold core cavity channel in the forming mold core is communicated with one end of a fluid channel in the connecting mechanism, and the other end of the fluid channel is used for being connected with a fluid source;

power unit can drive coupling mechanism drives the shaping mold core moves between primary importance and second place, wherein:

when the molding mold core is at the first position, the other end of the molding mold core is positioned in the injection molding space and is in sealing fit with the end part of the movable mold molding ejector sleeve;

when the forming mold core is at the second position, the other end of the forming mold core is arranged outside the injection mold, and when the fluid source outputs fluid, the fluid can sequentially pass through the fluid flow channel and the mold core cavity channel and flows out from the other end of the forming mold core.

Preferably, the core pulling mechanism further comprises a limiting mechanism, wherein the limiting mechanism comprises a first core pulling limiting guide rail and a second core pulling limiting guide rail;

the first core-pulling limiting guide rail and the second core-pulling limiting guide rail are respectively arranged on two sides of the connecting mechanism and are used for limiting and guiding the movement of the connecting mechanism.

Preferably, the limiting mechanism comprises a core-pulling base and an oil cylinder connecting block;

the fluid flow channel is arranged inside the core-pulling base, and one end of the forming mold core is arranged on the core-pulling base;

the power mechanism comprises a core-pulling oil cylinder, the core-pulling oil cylinder is installed on the support and an ejector rod of the core-pulling oil cylinder is movably connected with the core-pulling base through an oil cylinder connecting block, the core-pulling base can be driven to slide along the first core-pulling limiting guide rail and the second core-pulling limiting guide rail respectively.

Preferably, the device further comprises a control mechanism;

an oil cylinder position guide rod is installed on the core pulling base, and a first limit switch and a second limit switch are installed on two sides of the second core pulling limit guide rail respectively;

when the forming mold core moves to a first position, the oil cylinder position guide rod touches a first limit switch, the core-pulling oil cylinder stops acting, and the injection mold starts to be closed;

when the mold opening of the injection mold is completed, the core-pulling oil cylinder drives the forming mold core to move from a first position to a second position, and when the guide rod at the oil cylinder position touches a second limit switch, the core-pulling oil cylinder stops acting;

and the control mechanism is in signal connection with the injection mold, the core-pulling oil cylinder, the first limit switch, the second limit switch and a control valve connected with a fluid source respectively.

Preferably, the fluid source is connected with the core pulling base through a fluid connector;

the control valve is mounted between a fluid source and the fluid connector.

Preferably, a T-shaped space is arranged inside the core-pulling base, and the oil cylinder connecting block is of a T-shaped structure;

the T-shaped structure can be matched and installed in the T-shaped space.

Preferably, the other end of the forming mold core is of a groove structure, and the end part of the movable mold forming ejector sleeve is of a boss structure matched with the groove structure.

Preferably, the movable die-formed ejector sleeve comprises an ejector pin and an ejector sleeve pipe;

the ejector sleeve is sleeved outside the ejector needle, and the ejector sleeve and the ejector needle can move relatively.

Preferably, the sleeve is arranged on the bottom plate of the sliding block of the moving model cavity;

the injection molding device is characterized in that a first product module and a second product module are installed on one side, facing the injection molding space, of the movable mold cavity sliding block bottom plate, a containing through hole is formed in the contact position of the first product module and the second product module, and the containing through hole is used for enabling the end portion of the ejector sleeve to pass through.

Preferably, the core-pulling base is provided with an assembly space, and one end of the forming mold core is a mold core head;

the die core head can be fittingly mounted in the fitting space.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, by adding the design of the compressed air cooling system in the mold cavity, heat in the injection molding process is taken away in time, the service life of the mold core is prolonged, and the stability of the product is improved.

2. According to the utility model, the molding die core is cooled after the die is opened by adopting compressed air, so that the deformation influence of high temperature on the molding die core is reduced, the generation of product scrap is solved from the source, and the requirements on operation and inspection personnel are reduced.

3. The utility model has compact structural design, and can lead each action to be carried out continuously through the signal connection structure of the control mechanism, the injection mold, the core-pulling oil cylinder, the first limit switch, the second limit switch and the control valve, thereby improving the output efficiency and reliability of products and reducing the cost of spare parts.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a mold core;

FIG. 3 is a schematic view of the structure of the mold core and the movable mold core during the vertical piercing-sealing;

FIG. 4 is a schematic view of the structure of the fluid flow path in the present invention;

fig. 5 is a schematic structural diagram of the installation of the first product module and the second product module in the present invention.

The figures show that:

second limit switch 13 of forming mould core 1

First core-pulling limiting guide rail 14 of core-pulling base 2

Second core-pulling limiting guide rail 15 of oil cylinder connecting block 3

Fluid connector 4 moving model cavity sliding block bottom plate 16

Core-pulling oil cylinder 5 first product module 17

Second product module 18 of movable mould forming ejector sleeve 6

Fluid flow passage 7 boss structure 19

8 ejector pin 20 of mold core cavity

T-shaped space 9 ejector sleeve 21

Recess structure 10 assembly space 22

First limit switch 11 mold core head 23

Ram 24 of cylinder position guide rod 12

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.

The utility model provides a cooling system for a mold core of an injection mold, which comprises a power mechanism, a connecting mechanism, a support and a molding mold core 1, wherein the injection mold is provided with a movable mold forming sleeve 6, an injection space is formed in the injection mold when the injection mold is closed, one end of the molding mold core 1 is arranged on the connecting mechanism, a mold core cavity channel 8 formed in the molding mold core 1 is communicated with one end of a fluid flow channel 7 formed in the connecting mechanism, the other end of the fluid flow channel 7 is used for connecting a fluid source, the fluid source can adopt compressed air, nitrogen and the like, and the cooling system can be flexibly selected according to an actual application scene. The power mechanism can drive the connecting mechanism to drive the forming mold core 1 to move between a first position and a second position, wherein when the forming mold core 1 is at the first position, the other end of the forming mold core 1 is positioned in the injection molding space and is in sealing fit with the end part of the movable mold forming sleeve 6; when the forming mold core 1 is at the second position, the other end of the forming mold core 1 is arranged outside the injection mold, and when the fluid source outputs fluid, the fluid can sequentially pass through the fluid flow channel 7 and the mold core cavity channel 8 and flow out from the other end of the forming mold core 1.

In the product injection molding process, due to the requirement of the product appearance, the product is inserted into the injection molding space before the injection molding operation of the molding mold core 1, and a cavity space required by the interior of the product can be formed in the injection molding process so as to meet the requirement of product manufacturing. Because a certain temperature is needed in the injection molding process, the temperature of the molding mold core 1 is high, warping deformation is easily caused, fluid is introduced into the fluid flow channel 7 and the mold core cavity channel 8 through the fluid source, the mold core cavity channel 8 can be cooled, the heat of the mold core cavity channel 8 is taken away by the introduced fluid, the deformation probability of the mold core cavity channel 8 can be reduced, and the service life of the mold core cavity channel 8 is prolonged.

In order to increase the accuracy and stability of the movement, the core pulling device further comprises a limiting mechanism, wherein the limiting mechanism comprises a first core pulling limiting guide rail 14 and a second core pulling limiting guide rail 15, and the first core pulling limiting guide rail 14 and the second core pulling limiting guide rail 15 are respectively arranged on two sides of the connecting mechanism and are used for limiting and guiding the movement of the connecting mechanism. The limiting mechanism comprises a core-pulling base 2 and an oil cylinder connecting block 3, and the fluid flow channel 7 is arranged inside the core-pulling base 2 and at one end of the forming mold core 1 and is installed on the core-pulling base 2. In a preferred embodiment, the core-pulling base 2 has an assembly space 22 thereon, one end of the mold core 1 is a core head 23, and the core head 23 can be fittingly installed in the assembly space 22.

Further, the inside of base 2 of loosing core is provided with T shape space 9, as shown in fig. 4, hydro-cylinder connecting block 3 is T shape structure, T shape structure can match to install in T shape space 9, T shape space 9 can have a limiting effect to T shape structure, and then can order about base 2 of loosing core to move when power unit application of force.

Further, power unit is including loosing core hydro-cylinder 5, and it installs to loose core hydro-cylinder 5 on the support just the ejector pin 24 that the hydro-cylinder 5 of loosing core had passes through hydro-cylinder connecting block 3 swing joint loose core base 2 and can drive the both sides of loosing core base 2 are followed respectively first core pulling limiting guide rail 14, the second core pulling limiting guide rail 15 slide, and the support is used for the support of hydro-cylinder 5 of loosing core.

Specifically, install hydro-cylinder position guide arm 12 on the base 2 of loosing core, first limit switch 11, second limit switch 13 are installed respectively to the both sides that the second loosed core limit guide 15, work as when forming die core 1 moves to the primary importance, hydro-cylinder position guide arm 12 touches first limit switch 11, loose core hydro-cylinder 5 stop motion, injection mold begins the compound die, works as after injection mold die sinking is accomplished, loose core hydro-cylinder 5 orders about forming die core 1 moves towards the secondary importance from the primary importance and is in when hydro-cylinder position guide arm 12 touches second limit switch 13, loose core hydro-cylinder 5 stop motion. The utility model also comprises a control mechanism which is in signal connection, preferably in cable connection, with the injection mold, the core-pulling oil cylinder 5, the first limit switch 11, the second limit switch 13 and a control valve connected with a fluid source.

The fluid source is connected with the core-pulling base 2 through a fluid connector 4, and the control valve is installed between the fluid source and the fluid connector 4. In practical application, the fluid connector 4 may be directly mounted on the core-pulling base 2, or the fluid connector 4 may be connected to a pipe and then connected to the core-pulling base 2 as required, and the pipe is preferably a plastic hose meeting the pressure requirement, so as to meet the requirement of reciprocating motion. The control mechanism can control the action of each part according to the received signals of the injection mold, the first limit switch 11 and the second limit switch 13, so that the whole injection molding operation is realized.

Specifically, the other end of the molding mold core 1 is a groove structure 10, the end of the movable mold molding ejector sleeve 6 is a boss structure 19 matched with the groove structure 10, the movable mold molding ejector sleeve 6 comprises an ejector sleeve needle 20 and an ejector sleeve 21, the ejector sleeve 21 is sleeved outside the ejector sleeve needle 20, the ejector sleeve 21 and the ejector sleeve needle 20 can move relatively, and the mold opening is facilitated to enable a product to be ejected out of a product mold through the relative movement of the ejector sleeve 21 and the ejector sleeve needle 20.

Further, the ejector sleeve 21 is installed on the movable mould cavity sliding block bottom plate 16, a first product module 17 and a second product module 18 are installed on one side, facing the injection molding space, of the movable mould cavity sliding block bottom plate 16, a containing through hole is formed at the contact position of the first product module 17 and the second product module 18, and the containing through hole is used for enabling the end portion of the ejector sleeve 21 to pass through.

The working principle of the utility model is as follows:

the core-pulling oil cylinder 5 of the utility model drives the whole mechanism to operate by the power of a hydraulic system of an injection molding machine, a mandril 24 of the core-pulling oil cylinder 5 is connected with a core-pulling base 2 into a whole by an oil cylinder connecting block 3, when the core-pulling oil cylinder 5 moves forwards and backwards, a first core-pulling limiting guide rail 14 and a second core-pulling limiting guide rail 15 limit the radial movement of the oil cylinder connecting block 3 and guide the oil cylinder connecting block 3 to operate along the set direction of the core-pulling limiting guide rail, when the core-pulling oil cylinder 5 moves forwards, a cylinder position guide rod 12 moves synchronously, when the cylinder position guide rod 12 moves to trigger a first limiting switch 11, a molding mold core 1 moves to a first position, a control mechanism controls the core-pulling oil cylinder 5 to stop moving, the control mechanism controls an injection mold to close, a groove structure 10 of the molding mold core 1 and a boss structure 19 at the end part of a movable mold molding ejector sleeve 6 are jointed to form a sealing surface under the action of the injection mold closing pressure, when the injection molding machine injects glue, the first product module 17 and the second product module 18 fixed on the bottom plate 16 of the movable mold cavity slide block support the pressure in the plastic extrusion process, so that the molding mold core 1 and the movable mold molding ejector sleeve 6 keep the centers still, the injection pressure and the mold closing force of the injection mold simultaneously act, the flowing plastic is not extruded into the sealing surface jointed by the groove structure 10 and the boss structure 19 to block the cooling channel of the molding mold core 1, namely the mold core cavity channel 8, when the injection action of the injection molding machine is completed, and the product is cooled and formed to a set time, the control mechanism controls the core-pulling oil cylinder 5 to move backwards until the oil cylinder position guide rod 12 triggers the second limit switch 13, the molding mold core 1 moves to the second position, the control mechanism controls the control valve to be opened after obtaining a signal that the molding mold core 1 moves to the second position, and compressed air in a fluid source passes through the fluid joint 4, The fluid flow channel 7 and the mold core cavity channel 8 flow out of the other end of the forming mold core 1, the heat absorbed by the forming mold core 1 during injection molding is quickly taken away by normal-temperature compressed air with high pressure and high flow, the control valve is preferably a valve with adjustable opening, the air inlet pressure and flow of the compressed air are controlled by adjusting the opening of the control valve, and the time before the product is ejected out after mold opening and the next mold closing action is utilized, so that the heat generated by each injection molding of the forming mold core 1 is taken away by the compressed air with the same flow in the same time, the body of the slender forming mold core 1 is prevented from being warped and deformed due to the high temperature of molten plastic during continuous injection molding, the service life is prolonged, and the forming quality of the product is improved.

According to the utility model, the compressed air is adopted to cool the forming mold core 1 in the same cycle time of the mold opening process, so that the deformation influence of high temperature on the forming mold core 1 is reduced, the generation of product scrap is solved from the source, and the requirements on operation and inspection personnel are reduced.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A cooling system for a mold core of an injection mold is characterized by comprising a power mechanism, a connecting mechanism, a support and a forming mold core (1);

the injection mold is provided with a movable mold forming ejector sleeve (6), an injection space is arranged in the injection mold when the injection mold is closed, one end of the forming mold core (1) is arranged on the connecting mechanism, a mold core cavity channel (8) arranged in the forming mold core (1) is communicated with one end of a fluid flow channel (7) arranged in the connecting mechanism, and the other end of the fluid flow channel (7) is used for being connected with a fluid source;

the power mechanism can drive the connecting mechanism to drive the forming mold core (1) to move between a first position and a second position, wherein:

when the forming mold core (1) is at the first position, the other end of the forming mold core (1) is positioned in the injection molding space and is in sealing fit with the end part of the movable mold forming ejector sleeve (6);

when the forming mold core (1) is at the second position, the other end of the forming mold core (1) is arranged outside the injection mold and when the fluid source outputs fluid, the fluid can sequentially pass through the fluid flow channel (7) and the mold core cavity channel (8) and flows out from the other end of the forming mold core (1).

2. The injection mold core cooling system of claim 1, further comprising a limiting mechanism comprising a first core back limiting guide rail (14), a second core back limiting guide rail (15);

the first core-pulling limiting guide rail (14) and the second core-pulling limiting guide rail (15) are respectively arranged on two sides of the connecting mechanism and limit and guide the movement of the connecting mechanism.

3. The injection mold core cooling system of claim 2, wherein the limiting mechanism comprises a core-pulling base (2) and an oil cylinder connecting block (3);

the fluid flow channel (7) is arranged inside the core-pulling base (2) and one end of the forming mold core (1) is arranged on the core-pulling base (2);

power unit is including loosing core hydro-cylinder (5), and it installs to loose core hydro-cylinder (5) on the support just ejector pin (24) that loose core hydro-cylinder (5) had pass through hydro-cylinder connecting block (3) movable connection loose core base (2) and can drive the both sides of loosing core base (2) are followed respectively first stop rail (14), the second of loosing core stop rail (15) slide.

4. The injection mold core cooling system of claim 3, further comprising a control mechanism;

an oil cylinder position guide rod (12) is installed on the core pulling base (2), and a first limit switch (11) and a second limit switch (13) are installed on two sides of the second core pulling limit guide rail (15) respectively;

when the forming mold core (1) moves to a first position, the oil cylinder position guide rod (12) touches a first limit switch (11), the core-pulling oil cylinder (5) stops acting, and the injection mold starts to be closed;

after the injection mold is opened, the core-pulling oil cylinder (5) drives the forming mold core (1) to move from a first position to a second position, and when the guide rod (12) of the oil cylinder position touches a second limit switch (13), the core-pulling oil cylinder (5) stops acting;

the control mechanism is in signal connection with the injection mold, the core-pulling oil cylinder (5), the first limit switch (11), the second limit switch (13) and a control valve connected with a fluid source respectively.

5. An injection mould core cooling system according to claim 4, characterized in that the fluid source is connected to the core back base (2) by a fluid connection (4);

the control valve is arranged between a fluid source and the fluid connector (4).

6. The injection mold core cooling system according to claim 3, wherein a T-shaped space (9) is arranged inside the core-pulling base (2), and the oil cylinder connecting block (3) is of a T-shaped structure;

the T-shaped structure can be matched and installed in the T-shaped space (9).

7. An injection mold core cooling system according to claim 1, wherein the other end of the molding core (1) is a groove structure (10), and the end of the movable mold core barrel (6) is a boss structure (19) matching with the groove structure (10).

8. An injection mold core cooling system as claimed in claim 1, wherein said movable mold ejector (6) comprises an ejector pin (20) and an ejector sleeve (21);

the ejector sleeve (21) is sleeved outside the ejector needle (20), and the ejector sleeve (21) and the ejector needle (20) can move relatively.

9. An injection mold core cooling system as claimed in claim 8, further comprising a moving mold cavity slide base plate (16), said sleeve barrel (21) being mounted on said moving mold cavity slide base plate (16);

the injection molding device is characterized in that a first product module (17) and a second product module (18) are installed on one side, facing the injection molding space, of the movable mold cavity sliding block bottom plate (16), and a containing through hole is formed in the contact position of the first product module (17) and the second product module (18) and used for allowing the end portion of the sleeve (21) to pass through.

10. An injection mould core cooling system according to claim 3, characterized in that the core back base (2) has an assembly space (22) thereon, and one end of the forming core (1) is a core print (23);

the die core head (23) can be fittingly mounted in the assembly space (22).