CN221022171U - Mould with exhaust structure - Google Patents

Abstract

The utility model discloses a mold with an exhaust structure, which relates to the technical field of injection molds and comprises a lower mold, wherein an injection molding part is arranged at the top of the lower mold, an exhaust channel is arranged in the injection molding part, an air leakage part and a pressure equalizing part are arranged in the exhaust channel, the pressure equalizing part is arranged at the top of the air leakage part, the injection molding part comprises an upper mold, an injection molding part is arranged at the bottom of the upper mold, the injection molding part is connected with the lower mold in a matched manner to form a molding cavity, the injection molding part is mutually matched with the molding cavity, and the exhaust channel comprises a capillary cavity. According to the mold with the exhaust structure, the concentration of the floating plug pad and the concentration of the floating plug cavity bracket are staggered, so that air in the molding cavity is exhausted, after the air is exhausted, the floating plug pad and the floating plug cavity are reset through the deformation of the spring A, external air is prevented from entering, and therefore the generation of bubbles in the injection molding process is reduced, and the product quality is guaranteed.

Description

Mould with exhaust structure

Technical Field

The utility model relates to the technical field of injection molds, in particular to a mold with an exhaust structure.

Background

Injection molding is a critical tool for producing plastic articles by injecting molten plastic into a mold that, upon cooling and solidification, forms the desired product shape.

The injection mold generally comprises a mold substrate, a cavity and a core, wherein the cavity is an appearance part of a product, and the prior Chinese patent with the publication number of CN215095347U discloses the injection mold with an exhaust structure. The anti-leakage device mainly comprises an exhaust pipe, a screw rod, a torque and an anti-leakage plug, wherein the phenomenon that the appearance of a product is deficient due to the fact that gas exists in a lower die through the exhaust pipe can be avoided, and the anti-leakage plug plugs the exhaust pipe through the screw rod, so that feed liquid is prevented from entering the exhaust pipe.

The injection molding machine is generally used for conveying molten injection molding liquid into a channel of a cavity through a nozzle of the mold, the cavity inside the mold is completely filled with the injection molding liquid and cooled, the shape of the injection molding liquid is fixed, and the injection molding machine adopts a split type structure from top to bottom, so that in the injection molding process, air which is not discharged possibly remains in the mold, and after the injection molding of the injection molding liquid is finished, produced bubbles easily damage the appearance of an injection molding product, and the injection molding quality is affected.

Disclosure of utility model

The present utility model has been made in view of the above problems that in the conventional injection molding process, air that is not exhausted may remain in the mold, and after injection molding of the injection molding liquid is completed, the appearance of the injection molded product is easily damaged by generated air bubbles, and the injection molding quality is affected.

Accordingly, the present utility model is directed to a mold having a venting structure, which is directed to: and the residual gas in the mold is discharged during injection molding, so that the probability of bubble generation is reduced, and the injection molding quality is ensured.

In order to solve the technical problems, the utility model provides the following technical scheme: the die with the exhaust structure comprises a lower die, wherein an injection molding part is arranged at the top of the lower die, an exhaust channel is formed in the injection molding part, an air leakage part and a pressure equalizing part are arranged in the exhaust channel, and the pressure equalizing part is arranged at the top of the air leakage part;

The injection molding part comprises an upper mold, an injection molding part is arranged at the bottom of the upper mold, the injection molding part is connected with the lower mold in a matched mode to form a molding cavity, the injection molding part is mutually matched with the molding cavity, the exhaust channel comprises a capillary cavity, the capillary cavity is arranged at the bottom of the injection molding part and at the top of the molding cavity, an exhaust cavity is formed between the capillary cavities, a hollow cavity is formed at the other end of the exhaust cavity, the capillary cavities are communicated with each other through the exhaust cavity, and the diameter of the hollow cavity is larger than that of the exhaust cavity.

As a preferable embodiment of the mold with a venting structure of the present utility model, wherein: the exhaust channel further comprises a floating plug cavity, the air leakage component is arranged on the inner side of the floating plug cavity, the hollow cavity protrudes out of the surface of the injection molding piece through an air leakage nozzle, the air leakage nozzle is fixedly arranged on two sides of the injection molding piece, one end of the air leakage nozzle, which is away from the injection molding piece, is inclined downwards, and when the floating plug cavity is not blocked, the hollow cavity is communicated with the inside of the exhaust cavity.

As a preferable embodiment of the mold with a venting structure of the present utility model, wherein: the inside of injection molding is provided with the nozzle, the top of mould is gone up in the protruding one end of nozzle, go up the bottom of mould and in the outside fixed mounting of injection molding have the locating bolt, the locating bolt is mutually adapted with the bed die, when the locating bolt gets into the bed die completely, go up the laminating of mould bottom and the top of bed die.

As a preferable embodiment of the mold with a venting structure of the present utility model, wherein: the air leakage component comprises a floating plug rod, the floating plug rod is movably connected to the inner side of the exhaust cavity, a floating plug pad is fixedly arranged on the outer side of the floating plug rod, the floating plug pad is mutually matched with the floating plug cavity, the diameter of the floating plug pad is larger than that of the floating plug rod, and the diameter of the floating plug pad is identical with that of the floating plug cavity.

As a preferable embodiment of the mold with a venting structure of the present utility model, wherein: the top swing joint of floating plug pole has the axle that deflects, the other end swing joint of axle that deflects has the slider, one side of slider is provided with spring A, the fixed switching of floating plug pad is in the both sides of floating plug pad, the floating plug pad passes through the axle that deflects and links to each other with the slider, spring A is in the biggest length that stretches when the device is not used, and the distance between the slider is at minimum, and the height of floating plug pole is at minimum.

As a preferable embodiment of the mold with a venting structure of the present utility model, wherein: the top of floating plug pole still fixed mounting has the ejector pin, the pressure-equalizing part sets up the top at the ejector pin, the pressure-equalizing part includes the pressure-equalizing joint, the pressure-equalizing chamber has been seted up at the top of pressure-equalizing joint, the pressure-equalizing chamber communicates with each other with the cavity intracavity portion, the inside in pressure-equalizing chamber is provided with the piston subassembly, the piston subassembly is when the device is not used, blocks up the pressure-equalizing chamber, and pressure-equalizing chamber and cavity chamber are isolated each other this moment.

As a preferable embodiment of the mold with a venting structure of the present utility model, wherein: the piston assembly comprises a piston head, the piston head is mutually matched with a pressure equalizing joint, a piston pad A is fixedly arranged on the outer side of the piston head, the piston pad A is mutually matched with a pressure equalizing cavity, a piston pad B is fixedly arranged on the other side of the piston pad A, a piston rod is fixedly connected to the other side of the piston pad B, the section of the piston head is triangular, the piston head can block the pressure equalizing joint to enable the pressure equalizing cavity to be isolated from an exhaust cavity, and the piston pad A can isolate the pressure equalizing cavity to enable the pressure equalizing cavity to be isolated from a hollow cavity.

As a preferable embodiment of the mold with a venting structure of the present utility model, wherein: the device is characterized in that the outer side of the piston rod is provided with an air inlet cavity, the inner side of the air inlet cavity is movably connected with a pull rod, one end of the pull rod is fixedly connected with one end of the piston rod, the outer side of the pull rod is provided with a spring B, the spring B is in an extending state when the device is not used, and the distance between the piston pad B and the pressure equalizing joint is at a minimum value.

The utility model has the beneficial effects that:

1. Air in the molding cavity is discharged through misplacement of the concentration of the floating plug pad and the concentration of the floating plug cavity bracket, and after the discharge is completed, the floating plug pad and the floating plug cavity are reset through deformation of the spring A, so that external air is prevented from entering, air bubbles in the injection molding process are reduced, and the product quality is guaranteed.

2. The piston pad B and the piston head on the piston rod are used for pressurizing the exhaust cavity at the inner side of the pressure equalizing joint, so that injection molding liquid at the bottom of the floating plug rod in the exhaust cavity falls off from the capillary cavity, the probability of blockage of the device is reduced, and the stable operation of the device is ensured.

3. Through the butt joint of locating bolt and bed die, well hole for bed die and last mould laminate completely, the gas tightness when guaranteeing to mould plastics, thereby guarantee injection molding product quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

Fig. 1 is a schematic view of a vent passage structure of a mold having a vent structure according to the present utility model.

Fig. 2 is a schematic diagram of the overall structure of the mold with the venting structure of the present utility model.

Fig. 3 is a schematic cross-sectional structure of a mold having a venting structure according to the present utility model.

Fig. 4 is a schematic view of the structure of the venting member of the mold with venting structure of the present utility model.

Fig. 5 is a schematic view of the pressure equalizing member structure of the die having the exhaust structure of the present utility model.

Reference numerals illustrate:

1. A lower die; 2. injection molding a part; 21. an upper die; 22. an injection molding; 23. a nozzle; 24. a positioning bolt; 25. shaping the cavity; 3. an exhaust passage; 31. a capillary cavity; 32. an exhaust chamber; 33. a floating plug cavity; 34. a hollow cavity; 35. an air discharging nozzle; 4. a gas leakage component; 41. a floating plug rod; 42. a floating plug pad; 43. a deflection shaft; 44. a slide block; 45. a spring A; 46. a push rod; 5. a pressure equalizing member; 51. a pressure equalizing joint; 52. a pressure equalizing cavity; 53. a piston assembly; 531. a piston head; 532. a piston pad A; 533. a piston pad B; 54. a piston rod; 55. an air inlet cavity; 56. a pull rod; 57. and a spring B.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

Example 1

Referring to fig. 1-4, for a first embodiment of the present utility model, there is provided a mold having an air-discharging structure, the mold having an air-discharging structure includes a lower mold 1, an injection molding member 2 is disposed at the top of the lower mold 1, an air-discharging channel 3 is disposed inside the injection molding member 2, an air-discharging member 4 and a pressure equalizing member 5 are disposed inside the air-discharging channel 3, the pressure equalizing member 5 is disposed at the top of the air-discharging member 4, the injection molding member 2 includes an upper mold 21, an injection molding member 22 is disposed at the bottom of the upper mold 21, the injection molding member 2 is cooperatively connected with the lower mold 1 to form a molding cavity 25, the injection molding member 22 is mutually adapted to the molding cavity 25, the air-discharging channel 3 includes capillary cavities 31 disposed at the bottom of the injection molding member 22 and at the top of the molding cavity 25, an air-discharging cavity 32 is disposed between the capillary cavities 31, a hollow cavity 34 is disposed at the other end of the air-discharging cavity 32, and the capillary cavities 31 are communicated with each other through the air-discharging cavity 32.

The exhaust passage 3 further comprises a floating plug cavity 33, the air leakage component 4 is arranged on the inner side of the floating plug cavity 33, the hollow cavity 34 protrudes out of the surface of the injection molding piece 22 through an air leakage nozzle 35, and the air leakage nozzle 35 is fixedly arranged on two sides of the injection molding piece 22.

The inside of injection molding 22 is provided with nozzle 23, and the top of upper mould 21 is outstanding to nozzle 23's one end, and the bottom of upper mould 21 just is fixed mounting in the outside of injection molding 22 has locating bolt 24, and locating bolt 24 and bed die 1 mutually support.

The air release part 4 comprises a floating plug rod 41, the floating plug rod 41 is movably connected to the inner side of the air exhaust cavity 32, a floating plug pad 42 is fixedly arranged on the outer side of the floating plug rod 41, and the floating plug pad 42 is mutually matched with the floating plug cavity 33.

The top of the floating plug rod 41 is movably connected with a deflection shaft 43, the other end of the deflection shaft 43 is movably connected with a sliding block 44, and one side of the sliding block 44 is provided with a spring A45.

In the use process, after the butt joint is completed through the four corners of the positioning bolt 24 and the lower die 1, the bottom of the upper die 21 is attached to the top of the lower die 1, so that the injection molding piece 22 completely enters the molding cavity 25, and is connected with the injection molding machine joint through the nozzle 23, injection molding liquid is filled into the molding cavity 25, thus the injection molding work of products is completed, the butt joint of holes in the lower die 1 is completed through the positioning bolt 24, the lower die 1 is completely attached to the upper die 21, the air tightness during injection molding is ensured, the quality of injection molding products is ensured, during injection molding, residual air in the molding cavity 25 is extruded due to the addition of injection molding liquid, and is respectively collected in the exhaust cavity 32 from each capillary cavity 31, and is extruded into the floating plug rod 41 in the exhaust cavity 32, the positions of the floating plug rod 41 and the exhaust cavity 32 are staggered, the air passes through the floating plug cavity 33 to reach the middle cavity 34 and finally discharge through the air nozzle 35, the downward inclined air tap 35 is completely attached to the upper die 21, the air is completely discharged through the sliding plug rod 44, the air tap 44 is completely compressed by the sliding block 44, and the air tap distance A is reduced, and the air probability of the sliding block is reduced, and the air tap is completely compressed by the sliding block 44, and the sliding block is completely compressed by the sliding block 44.

Example 2

Referring to fig. 1-5, a second embodiment of the present utility model is shown, which differs from the first embodiment in that:

The air release part 4 comprises a floating plug rod 41, the floating plug rod 41 is movably connected to the inner side of the air exhaust cavity 32, a floating plug pad 42 is fixedly arranged on the outer side of the floating plug rod 41, and the floating plug pad 42 is mutually matched with the floating plug cavity 33.

The top of the floating plug rod 41 is fixedly provided with a push rod 46, the pressure equalizing component 5 is arranged at the top of the push rod 46, the pressure equalizing component 5 comprises a pressure equalizing joint 51, a pressure equalizing cavity 52 is formed at the top of the pressure equalizing joint 51, the pressure equalizing cavity 52 is communicated with the inside of the hollow cavity 34, and a piston assembly 53 is arranged in the pressure equalizing cavity 52.

The piston assembly 53 comprises a piston head 531, the piston head 531 is mutually matched with the pressure equalizing joint 51, a piston pad A532 is fixedly arranged on the outer side of the piston head 531, the piston pad A532 is mutually matched with the pressure equalizing cavity 52, a piston pad B533 is fixedly arranged on the other side of the piston pad A532, and a piston rod 54 is fixedly connected to the other side of the piston pad B533.

An air inlet cavity 55 is formed in the outer side of the piston rod 54, a pull rod 56 is movably connected to the inner side of the air inlet cavity 55, one end of the pull rod 56 is fixedly connected with one end of the piston rod 54, and a spring B57 is arranged on the outer side of the pull rod 56.

In use, the residual air in the shaping cavity 25 passes through the floating plug cavity 33 and then reaches the hollow cavity 34 and is discharged through the air discharge nozzle 35, the piston head 531 in the pressure equalizing joint 51 is extruded by air and separated from the pressure equalizing joint 51, so that the piston pad A532 is used for unblocking the pressure equalizing cavity 52, the air can be smoothly discharged from the pressure equalizing cavity 52, the pressure equalizing cavity 52 is isolated from the air inlet cavity 55 through the piston pad B533, meanwhile, the internal air pressure is communicated through the extrusion of the external air pressure to the piston pad B533, the extension length of the spring B57 is reduced through the piston rod 54, when the air is completely discharged, the external air pressure is extruded by the piston rod 54 and is increased along with the extension length of the spring B57, the piston pad a532 is made to isolate the pressure equalizing cavity 52 from the hollow cavity 34 again, so as to prevent external air from entering, during injection molding, part of injection molding liquid may enter the exhaust cavity 32 from the capillary cavity 31, although the injection molding liquid is blocked by the floating plug rod 41, the movement of the floating plug rod 41 may be affected when the injection molding liquid is injected, the pull rod 56 is pulled outwards, so that the spring B57 is compressed, after release, the piston pad B533 and the piston head 531 on the piston rod 54 are used for pressurizing the exhaust cavity 32 inside the pressure equalizing joint 51, so that the injection molding liquid at the bottom of the floating plug rod 41 in the exhaust cavity 32 falls off from the capillary cavity 31, the probability of device blockage is reduced, and stable operation of the device is ensured.

The rest of the structure is the same as that of embodiment 1.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (8)

1. A mould with exhaust structure, comprising a lower mould (1), characterized in that: the top of the lower die (1) is provided with an injection molding part (2), an exhaust channel (3) is formed in the injection molding part (2), an air leakage part (4) and a pressure equalizing part (5) are arranged in the exhaust channel (3), and the pressure equalizing part (5) is arranged at the top of the air leakage part (4);

Injection molding part (2) include mould (21), the bottom of last mould (21) is provided with injection molding (22), injection molding part (2) with mould (1) cooperation is connected in order to form moulding chamber (25) down, injection molding (22) and moulding chamber (25) adaptation each other, exhaust passage (3) include capillary chamber (31), capillary chamber (31) set up in the bottom of injection molding (22) and at the top of moulding chamber (25), exhaust chamber (32) have been seted up between capillary chamber (31), cavity (34) have been seted up to the other end of exhaust chamber (32), communicate with each other through exhaust chamber (32) between capillary chamber (31).

2. The mold with a venting structure of claim 1, wherein: the exhaust channel (3) further comprises a floating plug cavity (33), the air leakage component (4) is arranged on the inner side of the floating plug cavity (33), the hollow cavity (34) protrudes out of the surface of the injection molding piece (22) through an air leakage nozzle (35), and the air leakage nozzle (35) is fixedly arranged on two sides of the injection molding piece (22).

3. The mold with a venting structure of claim 2, wherein: the inside of injection molding (22) is provided with nozzle (23), the top of last mould (21) is outstanding to the one end of nozzle (23), the bottom of last mould (21) and in the outside fixed mounting of injection molding (22) have locating bolt (24), locating bolt (24) and bed die (1) looks adaptation each other.

4. A mold having a venting structure as defined in claim 3, wherein: the air leakage component (4) comprises a floating plug rod (41), the floating plug rod (41) is movably connected to the inner side of the air exhaust cavity (32), a floating plug pad (42) is fixedly arranged on the outer side of the floating plug rod (41), and the floating plug pad (42) and the floating plug cavity (33) are mutually matched.

5. The mold with a venting structure of claim 4, wherein: the top of the floating plug rod (41) is movably connected with a deflection shaft (43), the other end of the deflection shaft (43) is movably connected with a sliding block (44), and one side of the sliding block (44) is provided with a spring A (45).

6. The mold with a venting structure of claim 5, wherein: the top of floating plug rod (41) is still fixed mounting has ejector pin (46), pressure-equalizing component (5) set up the top at ejector pin (46), pressure-equalizing component (5) are including pressure-equalizing joint (51), pressure-equalizing cavity (52) have been seted up at the top of pressure-equalizing joint (51), pressure-equalizing cavity (52) communicate with each other with cavity (34) inside, the inside of pressure-equalizing cavity (52) is provided with piston assembly (53).

7. The mold with a venting structure of claim 6, wherein: the piston assembly (53) comprises a piston head (531), the piston head (531) is mutually matched with the pressure equalizing joint (51), a piston pad A (532) is fixedly arranged on the outer side of the piston head (531), the piston pad A (532) is mutually matched with the pressure equalizing cavity (52), a piston pad B (533) is fixedly arranged on the other side of the piston pad A (532), and a piston rod (54) is fixedly connected to the other side of the piston pad B (533).

8. The mold with a venting structure of claim 7, wherein: an air inlet cavity (55) is formed in the outer side of the piston rod (54), a pull rod (56) is movably connected to the inner side of the air inlet cavity (55), one end of the pull rod (56) is fixedly connected with one end of the piston rod (54), and a spring B (57) is arranged on the outer side of the pull rod (56).