CN115923061A - Exhaust mould for manufacturing smooth shell - Google Patents

Abstract

The utility model relates to an exhaust mould for making smooth casing relates to mould technical field, an exhaust mould for making smooth casing, includes: the device comprises a first upper die, a first lower die, a second upper die, a second lower die and a turntable, wherein the first upper die and the first lower die are arranged oppositely, the second upper die and the second lower die are arranged on the turntable respectively, the first lower die and the second lower die are both arranged on the turntable, and first filling grooves are formed in the first lower die and the second lower die; a second pouring groove is formed in the second upper die, and the position of the second pouring groove corresponds to the position of the first pouring groove; the first lower die and the second lower die are both provided with a garbage groove, and the garbage grooves are communicated with the first pouring groove; the first lower die and the second lower die are both provided with exhaust holes which are communicated with the garbage groove; and the first lower die and the second lower die are provided with sealing components. A demoulding hole is formed in the first lower die in a penetrating mode, a demoulding thimble is arranged in the demoulding hole, and the demoulding thimble slides in the demoulding hole. The application has the effect of increasing the surface smoothness of the product.

Description

Exhaust mould for manufacturing smooth shell

Technical Field

The application relates to the technical field of molds, in particular to an exhaust mold for manufacturing a smooth shell.

Background

When the mold is used for injection molding, molten plastic needs to be injected into the cavity through the injection molding hole, the cavity is in a closed environment, air in the cavity is continuously compressed in the process of continuous injection molding, the pressure intensity is increased, the cavity can not be filled easily, and then a formed product can not reach the expectation.

In the related art, the mold comprises an upper mold and a lower mold, the upper mold and the lower mold are arranged oppositely, an exhaust groove is formed in the end face, close to the upper mold, of the lower mold, and in the injection molding process, gas in a cavity is exhausted out of the cavity through the exhaust groove, so that the situation that the cavity cannot be filled is reduced.

In order to reduce the occurrence of the situation that the molten plastic flows into the exhaust groove, the depth of the exhaust groove needs to be low, generally needs to be between 0.02mm and 0.05mm, the depth of the exhaust groove is shallow, and further the exhaust effect is poor, and the situation that the cavity cannot be filled up still possibly exists, and further the smoothness of the surface of a product is affected.

Disclosure of Invention

The purpose of this application is to provide an exhaust mould for making smooth shell that increases the smoothness of the product surface.

The application provides an exhaust mould for making smooth casing. The following technical scheme is adopted: an exhaust mold for making smooth shells comprising: the device comprises a first upper die, a first lower die, a second upper die, a second lower die and a turntable, wherein the first upper die and the first lower die are arranged oppositely;

a second pouring groove is formed in the end face, close to the second lower die, of the second upper die, and the position of the second pouring groove corresponds to the position of the first pouring groove formed in the second lower die;

the end surfaces of the first lower die and the second lower die, which are close to the first upper die, are respectively provided with a garbage groove, and the garbage grooves are communicated with the first pouring groove;

the first lower die and the second lower die are both provided with exhaust holes, and the exhaust holes are communicated with the garbage groove;

sealing components for plugging the exhaust holes are mounted on the side walls of the first lower die and the second lower die;

a demolding hole is formed in the first lower die in a penetrating mode, a demolding thimble is arranged in the demolding hole, and the demolding thimble slides in the demolding hole.

Through adopting above-mentioned technical scheme, when pouring, the air in first filling groove and the second filling groove is discharged through the exhaust hole, melting plastics need flow into earlier in the rubbish groove, just can flow into in the exhaust hole, seal assembly can block up the exhaust hole before melting plastics flow into the exhaust hole, and melting plastics in the rubbish groove is unnecessary, and then close the exhaust hole in advance and only influenced the effect of moulding plastics of melting plastics in the rubbish groove, it is less to influence product itself, and the exhaust hole does not worry by stifled problem, then the size in exhaust hole can design great, thereby increase exhaust effect, and then make product injection moulding rear surface more smooth.

Optionally, there are a plurality of the garbage chutes, and the plurality of the garbage chutes are arranged at intervals along the circumference of the first pouring chute;

each garbage bin position all sets up one the drawing of patterns hole, every drawing of patterns hole with adjacent garbage bin intercommunication.

In general, demolding is carried out by ejecting a product by using a demolding ejector pin, and two ejector pins eject the product, so that marks are easily generated on the surface of the product, and the surface smoothness of the product is influenced; through adopting above-mentioned technical scheme, when the drawing of patterns, the rubbish that melting plastics formed in the rubbish groove was withstood to the drawing of patterns thimble becomes, and the drawing of patterns thimble does not carry out direct contact with the product when drawing of patterns with the product to reduce the possibility that the product surface produced the seal of a government organization in old china, and then increased the smooth degree on product surface.

Optionally, the garbage groove communicated with the exhaust hole is a first garbage groove, and the rest garbage grooves are second garbage grooves;

the first lower die and the second lower die are provided with air trapping grooves on the end faces, close to the first upper die, the air trapping grooves are communicated with the first garbage groove, and the air trapping grooves are communicated with the exhaust holes.

By adopting the technical scheme, after the exhaust hole is blocked, a small amount of air still exists in the first filling groove and the second filling groove, and the air is extruded into the trapped air groove, so that the garbage in the garbage groove is more completely molded, and the subsequent demolding is convenient.

Optionally, each exhaust hole is provided with one sealing assembly, each sealing assembly includes a first driving part and a sealing ejector pin, the first driving part is fixedly connected with the first lower die or the second lower die, the sealing ejector pin is connected to an output end of the first driving part, and the sealing ejector pin can block the exhaust hole.

Through adopting above-mentioned technical scheme, when the exhaust hole is plugged up to needs, open first driving piece, make first driving piece drive sealed thimble and remove, make during sealed thimble inserts the exhaust hole, and then plug up the exhaust hole to reduce the possibility that molten plastic got into the exhaust hole.

Optionally, the positions of the exhaust holes and the positions of the demolding holes are staggered.

By adopting the technical scheme, when demoulding is carried out, the sealing ejector pin does not need to be pulled out firstly, and then demoulding is carried out, so that the demoulding process is facilitated, and the demoulding speed is further accelerated.

Optionally, the sealing ejector pin is a hollow ejector pin, an exhaust pin is arranged in the air trapping groove, the exhaust pin is hollow, the exhaust pin is communicated with the sealing ejector pin, and the exhaust pin extends out of the air trapping groove;

one end of the exhaust pin, which is far away from the sealing thimble, is provided with a gas blowing hole, and the gas blowing hole is communicated with the inner space of the sealing thimble;

and a one-way assembly for controlling the on-off of the air blowing hole is arranged in the air blowing hole.

By adopting the technical scheme, when demoulding is carried out, the air is blown into the air trapping groove, so that upward air flow is generated on a formed product, and in the process of moving the demoulding thimble upwards, the resistance received by the demoulding thimble is reduced, thereby facilitating demoulding of the product.

Optionally, the inner diameter of the exhaust hole is larger than the outer diameter of the sealing thimble, and the sealing thimble can slide in the exhaust hole along the radial direction of the exhaust hole;

the first lower die and the second lower die are both provided with second driving pieces;

sealed thimble with the output sliding connection of first driving piece, first driving piece can drive sealed thimble is followed exhaust hole axial direction slides, the output of second driving piece with sealed thimble sliding connection, the second driving piece can drive sealed thimble is followed exhaust hole radial direction slides.

Through adopting above-mentioned technical scheme, before carrying out the wind-force drawing of patterns to the product, move the exhaust round pin outward earlier, leave certain space between messenger's exhaust round pin and the product, and then can store more air current in the space to increase atmospheric pressure, and then further made things convenient for the drawing of patterns of product.

Optionally, an air outlet is formed in the exhaust pin, and the air outlet is respectively communicated with the sealing ejector pin and the air blowing hole;

the single-pass assembly comprises a telescopic fence, a baffle and a driving plate, the baffle is arranged in the air blowing hole and slides along the axial direction of the air blowing hole, and the baffle can block the air outlet hole;

the telescopic fence is arranged in the air blowing hole, the telescopic fence is contracted along the axial direction of the air blowing hole, and the telescopic fence is contracted from two sides to the middle;

the baffle is fixedly connected to one end, close to the air trapping groove, of the telescopic fence, and the driving plate is fixedly connected to one end, far away from the air trapping groove, of the telescopic fence;

an elastic piece is arranged between the baffle plate and the driving plate, one end of the elastic piece is fixedly connected with the baffle plate, and the other end of the elastic piece is fixedly connected with the driving plate;

the baffle is provided with a locking piece used for limiting the baffle to move.

Through adopting above-mentioned technical scheme, when ventilating sealed thimble, the locking piece is opened, and wind blows the drive plate and removes to flexible fence center, makes flexible fence shrink to the center to make the venthole expose, and then can blow to trapping the gas inslot, thereby make things convenient for the drawing of patterns.

Optionally, a limiting groove is formed in the side wall of the baffle, and the limiting groove is obliquely arranged from bottom to top;

the locking piece comprises a ball, and the ball is arranged in the limiting groove and rolls in the limiting groove;

the inner diameter of the air outlet hole is smaller than the outer diameter of the ball, a clamping groove is formed in the exhaust pin and matched with the ball in size, and the clamping groove is formed in the position where the air outlet hole is communicated with the air blowing hole.

Through adopting above-mentioned technical scheme, after the venthole was blown into to wind, blow in the spacing groove with the ball in the draw-in groove to make the baffle relieve the locking, and then make flexible fence can contract, thereby the time wind blows to the product from the venthole, carries out the drawing of patterns.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the injection molding is carried out, air in the first injection groove and the second injection groove is exhausted through the exhaust holes, molten plastic needs to flow into the garbage groove firstly and then can flow into the exhaust holes, the sealing assembly can block the exhaust holes before the molten plastic flows into the exhaust holes, the molten plastic in the garbage groove is not needed, and then the exhaust holes are closed in advance, so that the injection molding effect of the molten plastic in the garbage groove is only influenced, the influence on a product is small, the problem that the exhaust holes are blocked is avoided, the size of the exhaust holes can be designed to be large, the exhaust effect is increased, and the surface of the product after injection molding is smoother;

2. when demoulding, the demoulding thimble props against the garbage formed by melting plastics in the garbage groove, and the demoulding thimble does not directly contact with the product when the product is demoulded, so that the possibility of generating marks on the surface of the product is reduced, and the smoothness of the surface of the product is increased;

3. when demoulding, blow to stranded the gas inslot to produce ascending air current to the shaping product, and then at the in-process that the drawing of patterns thimble moved up, the resistance that the drawing of patterns thimble received reduces, thereby makes things convenient for the drawing of patterns of product.

Drawings

Fig. 1 is an exploded view of a vented mold for making smooth shells according to an embodiment of the present application.

FIG. 2 is a cross-sectional view of an embodiment of the present application illustrating the location of a first pour slot.

FIG. 3 is a bottom view of an embodiment of the present application illustrating the location of a second pour slot.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 2.

FIG. 5 is a cross-sectional view of an embodiment of the present application showing a positional relationship between the first driving member and the second driving member.

FIG. 6 is a schematic structural diagram of an embodiment of the present application for sealing a positional relationship between an ejector pin and an exhaust pin.

Fig. 7 is a cross-sectional view of an embodiment of the present application for embodying the internal structure of a one-way component.

In the drawing, 11, a first upper die; 12. a first lower die; 13. a second upper die; 14. a second lower die; 15. a turntable;

21. a first perfusion channel; 22. a second perfusion channel;

31. a thimble hole; 32. a water gap thimble;

4. a refuse chute; 41. a first refuse chute; 42. a second waste chute; 43. demoulding holes; 44. demolding the thimble;

51. an exhaust groove; 52. an exhaust hole; 53. a gas trapping groove;

6. a seal assembly; 61. sealing the thimble; 62. a first driving member;

71. an exhaust pin; 711. an air outlet; 712. a gas blowing hole; 713. a card slot; 72. a second driving member;

8. a one-way component; 81. a telescopic fence; 811. a slide bar; 812. a slider; 82. a baffle plate; 821. a limiting groove; 83. a drive plate; 84. an elastic member;

9. a locking member; 91. and (4) a ball.

Detailed Description

The present application is described in further detail below with reference to fig. 1-7.

Example 1:

an exhaust mould for manufacturing a smooth shell, referring to fig. 1, comprises a first upper mould 11, a first lower mould 12, a second upper mould 13, a second lower mould 14 and a rotary table 15, wherein the first upper mould 11 is arranged opposite to the first lower mould 12, the second upper mould 13 is arranged opposite to the second lower mould 14, and the first lower mould 12 and the second lower mould 14 are both arranged on the rotary table 15.

Referring to fig. 1 and 2, the first lower die 12 and the second lower die 14 are both fixedly mounted on the turntable 15, the first filling grooves 21 are provided on the end surfaces of the first lower die 12 and the second lower die 14 close to the first upper die 11, the first filling grooves 21 are eight in this embodiment, four first filling grooves 21 are provided on the first lower die 12 and the second lower die 14, the second filling groove 22 is provided on the end surface of the second upper die 13 close to the second lower die 14, the second filling grooves 22 are four in this embodiment, and the second filling grooves 22 correspond to the positions of the first filling grooves 21 provided on the second lower die 14.

An ejector pin hole 31 is formed in each of the first lower die 12 and the second lower die 14, a nozzle ejector pin 32 is arranged in each ejector pin hole 31, and after injection molding is completed, nozzle materials can be formed in the first lower die 12 and the second lower die 14, and the nozzle ejector pins 32 can eject the nozzle materials out.

Referring to fig. 2 and 3, all seted up rubbish groove 4 on first lower mould 12 and second lower mould 14 is close to the terminal surface of first last mould 11, rubbish groove 4 has a plurality of, all sets up four rubbish grooves 4 around every first filling tank 21 in this embodiment, four rubbish grooves 4 along first filling tank 21 a week evenly distributed and with first filling tank 21 intercommunication, first filling tank 21 is triangle-shaped from the top down, first filling tank 21 enlarges from inside to outside gradually, is the shape of falling triangle-shaped. The inner bottom wall of each garbage bin 4 is vertically penetrated and provided with a demoulding hole 43, a demoulding thimble 44 is arranged in the demoulding hole 43, and the demoulding thimble 44 slides along the axial direction of the demoulding hole 43.

Referring to fig. 1 and 4, the first lower die 12 and the second lower die 14 both start to have an exhaust groove 51, the side walls of the first lower die 12 and the second lower die 14 both have a plurality of exhaust holes 52, in this embodiment, the first lower die 12 and the second lower die 14 both have four exhaust holes 52, four trash grooves 4 near four corners of the first lower die 12 and four trash grooves 4 near four angles of the second lower die 14 are first trash grooves 41, and the rest of the trash grooves 4 are second trash grooves 42. Every first rubbish groove 41 all communicates with an exhaust hole 52, and exhaust hole 52 staggers each other with adjacent drawing of patterns hole 43, has all seted up a plurality of air trapping grooves 53 on first lower mould 12 and the second lower mould 14, all seted up four air trapping grooves 53 on first lower mould 12 in this embodiment and the second lower mould 14, and every air trapping groove 53 all communicates with a first rubbish groove 41, and exhaust hole 52 communicates with air trapping groove 53.

Referring to fig. 4, each exhaust hole 52 is provided with a sealing assembly 6, the sealing assembly 6 includes a first driving member 62 and a sealing thimble 61, in this embodiment, the first driving member 62 is an air cylinder, the first driving member 62 is fixedly connected to a side wall of the first lower die 12 or the second lower die 14, an output end of the first driving member 62 is disposed toward the exhaust hole 52, and the sealing thimble 61 is fixedly connected to an output end of the first driving member 62.

The implementation principle of the embodiment 1 of the application is as follows: the first lower die 12 and the first upper die 11, the second lower die 14 and the second upper die 13 are closed, molten plastic is injected into the first pouring groove 21 on the first lower die 12, in the injection process, the molten plastic discharges air in the first pouring groove 21 out of the first pouring groove 21 through the exhaust groove 51 and the exhaust hole 52, the air in the first pouring groove 21 is extruded into the garbage bin 4 along with the flow of the molten plastic, then flows into the air trapping groove 53, finally flows out of the first pouring groove 21 through the exhaust hole 52, when the garbage bin 4 is to be filled, the first driving element 62 is opened, the first driving element 62 is extended, the sealing thimble 61 is driven to move towards the exhaust hole 52, the sealing thimble 61 is inserted into the exhaust hole 52, and the communication part between the exhaust hole 52 and the air trapping groove 53 is sealed by the sealing thimble 61, so that the possibility that the molten plastic flows out of the exhaust hole 52 is reduced. After the first pouring groove 21 in the first lower die 12 is filled, the die is cooled to cool the molten plastic.

At this time, the first lower die 12 and the first upper die 11 are opened, the second lower die 14 and the second upper die 13 are opened, and the nozzle pin 32 is moved upward to eject the nozzle material. The turntable 15 rotates to drive the first lower die 12 and the second lower die 14 to rotate, so that the first lower die 12 is aligned with the second upper die 13, the second lower die 14 is aligned with the first upper die 11, the die assembly is performed again, the first driving member 62 is opened, the sealing ejector pin 61 is disengaged from the exhaust hole 52, the first pouring groove 21 on the second lower die 14 and the second pouring groove 22 on the second upper die 13 are poured, the gas in the first pouring groove 21 and the second pouring groove 22 is exhausted through the exhaust groove 51 and the exhaust hole 52, and when the first pouring groove 21 and the second pouring groove 22 are to be filled, the first driving member 62 is opened, so that the sealing ejector pin 61 is inserted into the exhaust hole 52, and the exhaust hole 52 is blocked. After the pouring is finished, the mold is cooled, after the cooling is finished, the first upper mold 11 and the second lower mold 14 are opened, the second upper mold 13 and the first lower mold 12 are opened, at the moment, the demolding thimble 44 on the first lower mold 12 moves upwards to abut against the garbage edge formed by the molten plastic in the garbage groove 4, the product is demolded by pushing the garbage edge, and after the demolding, the turntable 15 rotates, and the operations are repeated.

Example 2:

the difference between the embodiment 2 and the embodiment 1 is that the embodiment 2 has an additional wind-force demoulding process.

Referring to fig. 5 and 6, the sealing thimble 61 is a hollow thimble, the sidewall of the sealing thimble 61 is connected to an air pump, an air exhaust pin 71 is disposed in the air trap 53, the air exhaust pin 71 is hollow and is communicated with the sealing thimble 61, and an air blow hole 712 is opened at one end of the air exhaust pin 71 away from the sealing thimble 61.

Referring to fig. 6 and 7, a one-way assembly 8 is provided in the blow hole 712. The inner diameter of the exhaust hole 52 is greater than the outer diameter of the sealing thimble 61, the sealing thimble 61 can slide along the radial direction of the exhaust hole 52, the first lower die 12 and the second lower die 14 are both provided with a second driving element 72, in this embodiment, the second driving element 72 is an air cylinder, the output end of the second driving element 72 is slidably connected with the side wall of the sealing thimble 61, and the sealing thimble 61 is slidably connected with the output end of the first driving element 62.

Referring to fig. 7, the exhaust pin 71 is provided with an air outlet 711, the air outlet 711 is respectively communicated with the sealing thimble 61 and the air blowing hole 712, the one-way assembly 8 comprises a telescopic fence 81, a baffle 82 and a driving plate 83, the baffle 82 is arranged in the air blowing hole 712 and slides along the axial direction of the air blowing hole 712, and the baffle 82 can block the air outlet 711; the telescopic fence 81 is arranged in the air blowing hole 712, the telescopic fence 81 contracts along the axial direction of the air blowing hole 712, and the telescopic fence 81 contracts from two sides to the middle; the baffle 82 is fixedly connected to one end of the telescopic fence 81 close to the air trapping groove 53, and the driving plate 83 is fixedly connected to one end of the telescopic fence 81 far from the air trapping groove 53; an elastic member 84 is arranged between the baffle 82 and the driving plate 83, in the embodiment, the elastic member 84 is a spring, one end of the elastic member 84 is fixedly connected with the baffle 82, and the other end of the elastic member 84 is fixedly connected with the driving plate 83; the shutter 82 is provided with a locking member 9.

Referring to fig. 7, the telescopic fence 81 includes two mutually intersecting sliding bars 811 and four sliding blocks 812, the two sliding bars 811 are rotatably connected at the intersecting portion, each end of the two sliding bars 811 is hinged with one sliding block 812, two adjacent sliding blocks 812 are slidably connected with the driving plate 83, and the other two adjacent sliding blocks 812 are slidably connected with the baffle 82. When the driving plate 83 is forced to move to the intersection of the two sliding rods 811, the included angle between the two sliding rods 811 is increased, and the two adjacent sliding blocks 812 slide in the direction away from each other, so that the telescopic fence 81 is retracted toward the center of the two sliding rods 811.

Spacing groove 821 has been seted up to baffle 82 lateral wall, spacing groove 821 is from lower to upper slope setting, locking piece 9 includes ball 91, ball 91 sets up in spacing groove 821 and rolls in spacing groove 821, draw-in groove 713 has been seted up on the air release pin 71, draw-in groove 713 and venthole 711 communicate, draw-in groove 713 and ball 91 size adaptation, the size of venthole 711 is less than the diameter of ball 91, baffle 82 is when initial position, spacing groove 821 aligns with draw-in groove 713, half of ball 91 is in spacing groove 821 in draw-in groove 713, carry out spacing with baffle 82.

The implementation principle of the embodiment 2 is as follows: when the mold is to be removed, the second driving element 72 operates to drive the sealing pin 61 to move along the radial direction of the exhaust hole 52, so that the sealing pin 61 drives the exhaust pin 71 to move away from the air trapping groove 53. At this time, the air pump operates to ventilate the sealing thimble 61, the air flow flows into the exhaust pin 71 through the sealing thimble 61 and then flows into the air outlet 711 and the air blowing hole 712, the air flow in the air blowing hole 712 blows the driving plate 83 to move towards the center of the telescopic fence 81, so as to drive the two ends of the telescopic fence 81 to stretch towards the middle, and at this time, the baffle 82 is limited by the ball 91, so that the telescopic fence 81 does not move at this time.

The air current that gets into in the venthole 711 flows into in the draw-in groove 713, blow in the spacing groove 821 with ball 91 in the draw-in groove 713, thereby make baffle 82 and spacing groove 821 break away from the cooperation, thereby make flexible fence 81 contract, and then elastic component 84 is compressed, and then make the air current blow out from venthole 711, blow in gas hole 712 hole, and then blow in trapping groove 53, thereby blow the product after the shaping, drawing of patterns thimble 44 upwards removes this moment, promote the product rebound and carry out the drawing of patterns, carry out wind-force drawing of patterns and thimble drawing of patterns simultaneously, the process of drawing of patterns has more made things convenient for, accelerate drawing of patterns speed. When demoulding is finished, ventilation is not continued, and the elastic piece 84 restores to drive the driving plate 83 and the baffle 82 to restore.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. An exhaust mold for making smooth shells comprising: the device comprises a first upper die (11), a first lower die (12), a second upper die (13), a second lower die (14) and a turntable (15), wherein the first upper die (11) is arranged opposite to the first lower die (12), the second upper die (13) is arranged opposite to the second lower die (14), and the first lower die (12) and the second lower die (14) are both arranged on the turntable (15), and the device is characterized in that the end surfaces, close to the first upper die (11), of the first lower die (12) and the second lower die (14) are both provided with a first pouring groove (21);

a second pouring groove (22) is formed in the end face, close to the second lower die (14), of the second upper die (13), and the position of the second pouring groove (22) corresponds to the position of the first pouring groove (21) formed in the second lower die (14);

the end faces, close to the first upper die (11), of the first lower die (12) and the second lower die (14) are provided with garbage chutes (4), and the garbage chutes (4) are communicated with the first pouring groove (21);

the first lower die (12) and the second lower die (14) are both provided with exhaust holes (52), and the exhaust holes (52) are communicated with the garbage groove (4);

the side walls of the first lower die (12) and the second lower die (14) are respectively provided with a sealing assembly (6) for plugging the exhaust hole (52);

a demoulding hole (43) is formed in the first lower die (12) in a penetrating mode, a demoulding thimble (44) is arranged in the demoulding hole (43), and the demoulding thimble (44) slides in the demoulding hole (43).

2. An exhaust mould for making smooth shell according to claim 1 characterized in that there are several said refuse chutes (4), several said refuse chutes (4) being arranged at intervals along a circumference of said first filling chute (21);

each garbage bin (4) is provided with one demolding hole (43), and each demolding hole (43) is communicated with the adjacent garbage bin (4).

3. An exhaust mould for making smooth shells according to claim 1 or 2, characterized in that the refuse chute (4) communicating with the exhaust hole (52) is a first refuse chute (41) and the remaining refuse chutes are second refuse chutes (42);

the end faces, close to the first upper die (11), of the first lower die (12) and the second lower die (14) are provided with air trapping grooves (53), the air trapping grooves (53) are communicated with the first garbage groove (41), and the air trapping grooves (53) are communicated with the exhaust holes (52).

4. An exhaust mold for manufacturing smooth shell according to claim 3, wherein each exhaust hole (52) is provided with one sealing assembly (6), the sealing assembly (6) comprises a first driving member (62) and a sealing thimble (61), the first driving member (62) is fixedly connected with the first lower mold (12) or the second lower mold (14), the sealing thimble (61) is connected to an output end of the first driving member (62), and the sealing thimble (61) can block the exhaust hole (52).

5. An exhaust mold for making smooth shells according to claim 4, characterized in that the exhaust hole (52) and the release hole (43) are staggered.

6. The vent mold for manufacturing a smooth shell according to claim 4, wherein the sealing pin (61) is a hollow pin, a vent pin (71) is disposed in the air trapping groove (53), the vent pin (71) is hollow, the vent pin (71) is communicated with the sealing pin (61), and the vent pin (71) extends out of the air trapping groove (53);

one end of the exhaust pin (71) far away from the sealing thimble (61) is provided with a gas blowing hole (712), and the gas blowing hole (712) is communicated with the inner space of the sealing thimble (61);

and a one-way component (8) for controlling the on-off of the air blowing hole (712) is arranged in the air blowing hole (712).

7. The venting mold for producing a smooth shell as claimed in claim 6, wherein the inner diameter of the venting hole (52) is larger than the outer diameter of the sealing pin (61), and the sealing pin (61) is slidable in the venting hole (52) along the radial direction of the venting hole (52);

a second driving piece (72) is arranged on each of the first lower die (12) and the second lower die (14);

sealed thimble (61) with the output sliding connection of first driving piece (62), first driving piece (62) can drive sealed thimble (61) are followed exhaust hole (52) axial direction slides, the output of second driving piece (72) with sealed thimble (61) sliding connection, second driving piece (72) can drive sealed thimble (61) are followed exhaust hole (52) radial direction slides.

8. The exhaust mold for manufacturing the smooth shell according to claim 6, wherein the exhaust pin (71) is provided with an air outlet hole (711), and the air outlet hole (711) is respectively communicated with the sealing ejector pin (61) and the air blowing hole (712);

the single-pass assembly (8) comprises a telescopic fence (81), a baffle plate (82) and a driving plate (83), the baffle plate (82) is arranged in the air blowing hole (712) and slides along the axial direction of the air blowing hole (712), and the baffle plate (82) can block the air outlet hole (711);

the telescopic fence (81) is arranged in the air blowing holes (712), the telescopic fence (81) contracts along the axial direction of the air blowing holes (712), and the telescopic fence (81) contracts from two sides to the middle;

the baffle plate (82) is fixedly connected to one end, close to the air trapping groove (53), of the telescopic fence (81), and the driving plate (83) is fixedly connected to one end, far away from the air trapping groove (53), of the telescopic fence (81);

an elastic piece (84) is arranged between the baffle plate (82) and the driving plate (83), one end of the elastic piece (84) is fixedly connected with the baffle plate (82), and the other end of the elastic piece (84) is fixedly connected with the driving plate (83);

the baffle plate (82) is provided with a locking piece (9) used for limiting the movement of the baffle plate (82).

9. The exhaust mold for manufacturing the smooth shell according to claim 8, wherein the side wall of the baffle (82) is provided with a limiting groove (821), and the limiting groove (821) is obliquely arranged from bottom to top;

the locking piece (9) comprises a ball (91), and the ball (91) is arranged in the limiting groove (821) and rolls in the limiting groove (821);

the inner diameter of the air outlet hole (711) is smaller than the outer diameter of the ball (91), a clamping groove (713) is formed in the exhaust pin (71), the clamping groove (713) is matched with the ball (91) in size, and the clamping groove (713) is formed in the position where the air outlet hole (711) is communicated with the air blowing hole (712).

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