CN115157543A

CN115157543A - Batch injection molding process for plastic objects

Info

Publication number: CN115157543A
Application number: CN202210778414.1A
Authority: CN
Inventors: 李建光
Original assignee: Wuxi Menglite Technology Co ltd
Current assignee: Wuxi Menglite Technology Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2022-10-11

Abstract

The invention provides a batch injection molding process of plastic objects, which uses an injection molding device for injection molding, wherein the injection molding device comprises a supporting platform and a forming mold, a plurality of forming mold grooves are arranged on the forming mold, a hot melting device is fixed above the supporting platform, a receiving bracket is arranged on the supporting platform in a sliding manner and is positioned below a discharge hole of the hot melting device, and the moving direction of the forming mold on the receiving bracket is vertical to the sliding direction of the receiving bracket. According to the injection molding device, the forming die of the feeding platform is pushed onto the receiving support, the main valve is opened, the first forming die cavity receives plastic melt, after receiving is completed, the second air cylinder is started, the gear rotates, the next forming die cavity is controlled to move to the position below the second discharging pipe, in the moving process, the second discharging pipe moves upwards, the second discharging pipe is in a closed state, and batch injection molding is achieved.

Description

Batch injection molding process for plastic objects

Technical Field

The invention relates to an injection molding process, in particular to a batch injection molding process of plastic objects.

Background

Injection molding is a method for producing and molding industrial products. The products are generally produced by rubber injection molding and plastic injection molding. The injection molding can be classified into injection molding and die casting.

When the traditional mode of moulding plastics is receiving the plastics liquation that hot melt device flowed out, if forming die is a plurality of, a plurality of forming die of control that are difficult to automize receive the plastics liquation in proper order, therefore the degree of difficulty of plastics article batch production is big, and need manually close hot melt device's ejection of compact control valve when forming die switches, avoids it to flow to the border and causes the waste.

Disclosure of Invention

The invention aims to provide a batch injection molding process of plastic objects, which comprises the steps of pushing a forming mold of a feeding platform to push the forming mold onto a receiving bracket, opening a main valve, receiving plastic melt in a first forming mold groove, starting a second air cylinder after receiving the plastic melt, rotating a gear to control the next forming mold groove to move to the lower part of a second discharging pipe, moving the second discharging pipe upwards in the moving process to enable the second discharging pipe to be in a closed state, realizing batch injection molding, extending an electric telescopic rod after all plastic melt is received in one line of forming mold grooves of an injection molding device, enabling the output end of the electric telescopic rod to be inserted into a corresponding groove, controlling the second air cylinder to enable a trigger rod to push a pressing block to move, moving the next line of forming mold grooves to the lower part of the second discharging pipe, moving the second discharging pipe upwards in the moving process simultaneously to enable the second discharging pipe to be in the closed state, and enabling the injection molding device to be capable of realizing closing when the forming mold grooves and avoiding flowing to the edges of the forming mold grooves, so that waste of the plastic objects is avoided and the quality of the plastic objects is improved.

The purpose of the invention can be realized by the following technical scheme:

a mass injection molding process for plastic articles, the injection molding process comprising the steps of:

s1: production of plastic melt

And (3) carrying out hot melting on the added plastic by a hot melting device to form a plastic melt, wherein the heating temperature is 160-200 ℃, and the stirring speed is 230-280r/min during the heating process.

S2: plastic molding

And injecting the plastic melt into the corresponding forming die cavity, and cooling the plastic melt after injection to form the plastic, wherein the cooling time is 6-10min.

S3: demoulding of plastics

And (3) reversing the forming die cavity in the step (S2), and demolding to generate a plastic product.

The injection molding process is characterized in that the injection molding device is used for injection molding, the injection molding device comprises a supporting platform and a forming mold, a plurality of forming mold grooves are formed in the forming mold, a hot melting device is fixed above the supporting platform, and a receiving support is arranged on the supporting platform in a sliding mode.

The receiving support is located below a discharge port of the hot melting device, and the direction of the forming die moving on the receiving support is perpendicular to the sliding direction of the receiving support.

Furthermore, the supporting platform comprises a U-shaped platform, rectangular through holes are formed in the side walls of the two sides of the U-shaped platform, a first connecting plate is connected between the side walls of the U-shaped platform, and a first sliding rail is arranged on the first connecting plate.

Further, including the agitator that has the heating function of hot melt device, the below intercommunication of agitator is equipped with first discharging pipe, and the discharge gate of first discharging pipe is located the below of U type platform, is equipped with the main valve on the first discharging pipe, and the bottom of first discharging pipe is equipped with first closing plate.

A second discharging pipe is sleeved at one end of a discharging port of the first discharging pipe, a second sealing plate is fixed on the inner wall of the second discharging pipe, when the second sealing plate is in contact with the first sealing plate, sealing of the discharging port of the first discharging pipe is achieved, and when the second sealing plate is separated from the first sealing plate, discharging of the discharging port of the second discharging pipe is achieved.

The both sides of first discharging pipe all are fixed with the connecting rod, and the one end of connecting rod is passed the rectangle through hole and is equipped with the depression bar perpendicularly, and the both sides lower extreme of depression bar all is equipped with the fillet, and the top of connecting rod is fixed with the third slide bar, and the both sides of first discharging pipe all are equipped with the connecting block, are equipped with the sliding hole on the connecting block, and the third slide bar passes the sliding hole and is fixed with the stopper, is connected with first elastic component between connecting block and the connecting rod, under the effect of first elastic component, second closing plate and first closing plate separation.

Furthermore, one side of the supporting platform is provided with a feeding platform, the other side of the supporting platform is provided with a discharging platform, and the feeding platform is used for conveying the forming die cavity to the receiving support.

Furthermore, a first driving piece used for controlling the receiving support to slide is fixed on the feeding platform, and a second driving piece used for controlling the forming mold to move on the receiving support is fixed on the feeding platform.

Furthermore, first driving piece includes the gear of symmetric distribution, and the gear is located the both sides rotation of U type platform respectively, is connected with the lead screw between the pivot of gear, lead screw and receiving support screw-thread fit.

The both sides of U type platform are all slided and are equipped with the connecting strip, and the connecting strip lower extreme is equipped with the rack of array distribution, and rack and gear cooperation leave the clearance between the rack, and the top of connecting strip is fixed with the drive strip, drive strip and rack one-to-one, and during drive strip and depression bar contact, the promotion depression bar rises, drives the second discharging pipe simultaneously and rises for the contact of second closing plate and first closing plate, the discharge of suspending.

The supporting blocks are arranged on two sides of the U-shaped table, the first sliding rod is fixed on the connecting strip and is in sliding connection with the supporting blocks, the second air cylinder is fixed above the U-shaped table, the U-shaped rod is fixed on an output shaft of the second air cylinder, and the U-shaped rod is fixedly connected with the first sliding rod.

Further, forming die's both sides top all is fixed with the backing sheet of array distribution, be equipped with the recess on the backing sheet, the second driving piece is including fixing the support bar at symmetric distribution, the both sides inner wall at U type platform is fixed respectively to the support bar, it is equipped with the second slide bar to slide on the support bar, the one end of second slide bar is fixed with presses the briquetting, the other end runs through the support bar and is equipped with electric telescopic handle perpendicularly, be connected with the second elastic component between pressing briquetting and the support bar, when the recess on the backing sheet is located the below, extension electric telescopic handle, make its output insert in the recess that corresponds.

The top of pressing the briquetting is connected with the horizontally actuating lever, and the actuating lever is close to the one end top of connecting rod and is equipped with the fillet, realizes the removal that forming die is located the receiving support through pressing the briquetting, and the actuating lever promotes the connecting rod and rises, drives the second discharging pipe simultaneously and rises for second closing plate and first closing plate contact.

One side of the supporting platform, which is close to the feeding platform, is provided with symmetrically distributed second connecting plates, the second connecting plates are connected to the first sliding rods, one side of the second connecting plates, which is close to the supporting platform, is fixed with a trigger rod for pushing the press block, and after the material is received in the forming die cavity at the edges of two sides of the forming die, the trigger rod is continuously moved to the side close to the press block, so that the trigger rod pushes the press block to move.

The invention has the beneficial effects that:

1. according to the injection molding device, the forming die of the feeding platform is pushed onto the receiving support, the main valve is opened, the plastic melt is received in the first forming die cavity, after the plastic melt is received, the second cylinder is started, the gear rotates, the next forming die cavity is controlled to move to the position below the second discharging pipe, and in the moving process, the second discharging pipe moves upwards, so that the second discharging pipe is in a closed state, and batch injection molding is realized;

2. after the plastic solution is completely received by one line of forming die cavities of the injection molding device, the electric telescopic rod is extended to enable the output end of the electric telescopic rod to be inserted into the corresponding groove, the second air cylinder is controlled, the trigger rod pushes the pressing block to move, the forming die cavity on the next line is moved to the position below the second discharging pipe, and in the moving process, the second discharging pipe moves upwards to enable the second discharging pipe to be in a closed state.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the structure of an injection molding apparatus according to the present invention;

FIG. 2 is a schematic view of the structure of the injection molding apparatus of the present invention;

FIG. 3 is a schematic view of the structure of the injection molding apparatus of the present invention;

FIG. 4 is a schematic view of the structure of the injection molding apparatus of the present invention;

FIG. 5 is a schematic sectional view of a part of the structure of the injection molding apparatus of the present invention;

FIG. 6 is an enlarged schematic view of the structure at A in FIG. 2;

in the figure: 1. a support platform; 8. forming a mold; 81. forming a die cavity; 82. a support sheet; 2. a feeding platform; 3. a blanking platform; 4. a hot melting device; 5. receiving a bracket; 6. a first driving member; 7. a second driving member; 11. a U-shaped table; 12. a rectangular through hole; 13. a first connecting plate; 14. a first slide rail; 31. a conveying device; 32. a U-shaped receiving disc; 33. a limiting plate; 34. a first cylinder; 41. a stirring barrel; 42. a first discharge pipe; 411. a main valve; 43. a first sealing plate; 44. a second discharge pipe; 45. a second sealing plate; 46. a connecting rod; 410. a pressure lever; 47. a third slide bar; 48. a limiting block; 49. a first elastic member; 61. a gear; 62. a screw rod; 63. a connecting strip; 64. a rack; 65. a drive bar; 66. a support block; 67. a first slide bar; 68. a second cylinder; 69. a U-shaped rod; 71. a supporting strip; 72. a second slide bar; 75. an electric telescopic rod; 74. a second elastic member; 73. a drive rod; 76. a second connecting plate; 77. a trigger lever.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

s1: production of plastic melt

The added plastic is hot-melted by a hot melting device to form plastic melt, the heating temperature is 180 degrees, stirring is carried out in the heating process, and the stirring speed is 260r/min;

s2: plastic molding

Injecting the plastic melt into a corresponding forming die cavity, and cooling the plastic melt after injection is finished to form the plastic, wherein the cooling time is 8min;

s3: demoulding of plastics

Reversing the forming die cavity in the step S2, and demolding to generate a plastic product;

the injection molding process uses an injection molding device for injection molding, the injection molding device comprises a supporting platform 1 and a forming mold 8, as shown in fig. 2, a plurality of forming mold grooves 81 are formed in the forming mold 8, supporting sheets 82 distributed in an array mode are fixed on the upper portions of two sides of the forming mold 8, grooves are formed in the supporting sheets 82, a feeding platform 2 is arranged on one side of the supporting platform 1, a discharging platform 3 is arranged on the other side of the supporting platform 1, a hot melting device 4 is fixed above the supporting platform 1, a receiving support 5 is arranged on the supporting platform 1 in a sliding mode, and the feeding platform 2 is used for conveying the forming mold grooves 81 to the receiving support 5.

The receiving support 5 is located below a discharge port of the hot melting device 4, a first driving member 6 for controlling the receiving support 5 to slide is fixed on the feeding platform 2, a second driving member 7 for controlling the forming mold 8 to move on the receiving support 5 is fixed on the feeding platform 2, and as shown in fig. 6, the moving direction of the forming mold 8 on the receiving support 5 is perpendicular to the sliding direction of the receiving support 5.

The supporting platform 1 comprises a U-shaped platform 11, as shown in fig. 2, rectangular through holes 12 are formed in the side walls of the two sides of the U-shaped platform 11, a first connecting plate 13 is connected between the side walls of the U-shaped platform 11, a first sliding rail 14 is arranged on the first connecting plate 13, the lower portion of the receiving support 5 slides on the first sliding rail 14, and a U-shaped plate is arranged above the receiving support.

The blanking platform 3 comprises a conveying device 31, as shown in fig. 3, a U-shaped receiving tray 32 is rotatably arranged on one side of the conveying device 31, limiting plates 33 are symmetrically distributed at one end of an opening of the U-shaped receiving tray 32, a first air cylinder 34 is rotatably arranged on the conveying device 31, an output shaft of the first air cylinder 34 is rotatably connected with the U-shaped receiving tray 32, the first air cylinder 34 is used for controlling the U-shaped receiving tray 32 to turn over, when the U-shaped receiving tray 32 rotates to the position above the conveying device 31, the opening of the U-shaped receiving tray 32 faces downwards, and when the U-shaped receiving tray 32 rotates to the position with the opening facing upwards, the U-shaped receiving tray 32 is collinear with the feeding platform 2.

The hot melting device 4 comprises an agitating barrel 41 with a heating function, as shown in fig. 4 and 5, a first discharging pipe 42 is communicated with the lower part of the agitating barrel 41, a discharging port of the first discharging pipe 42 is positioned below the U-shaped platform 11, a main valve 411 is arranged on the first discharging pipe 42, and a first sealing plate 43 is arranged at the bottom of the first discharging pipe 42.

A second discharging pipe 44 is sleeved at one end of a discharging port of the first discharging pipe 42, a second sealing plate 45 is fixed on the inner wall of the second discharging pipe 44, when the second sealing plate 45 is in contact with the first sealing plate 43, the discharging port of the first discharging pipe 42 is sealed, and when the second sealing plate 45 is separated from the first sealing plate 43, the discharging port of the second discharging pipe 44 is discharged.

Connecting rods 46 are fixed to two sides of the first discharging pipe 42, a pressing rod 410 is perpendicularly arranged at one end of the connecting rod 46 after the end of the connecting rod 46 penetrates through the rectangular through hole 12, round corners are arranged at two lower ends of two sides of the pressing rod 410, a third sliding rod 47 is fixed above the connecting rod 46, connecting blocks (not marked in the figure) are arranged on two sides of the first discharging pipe 42, sliding holes are formed in the connecting blocks, the third sliding rod 47 penetrates through the sliding holes and is fixed with a limiting block 48, a first elastic piece 49 is connected between the connecting blocks and the connecting rod 46, and under the action of the first elastic piece 49, the second sealing plate 45 is separated from the first sealing plate 43.

The first driving member 6 comprises gears 61 which are symmetrically distributed, the gears 61 are respectively positioned on two sides of the U-shaped table 11 to rotate, a screw rod 62 is connected between rotating shafts of the gears 61, and the screw rod 62 is in threaded fit with the receiving bracket 5.

The connecting strips 63 are arranged on two sides of the U-shaped table 11 in a sliding mode, racks 64 distributed in an array mode are arranged at the lower ends of the connecting strips 63, the racks 64 are matched with the gears 61, gaps are reserved among the racks 64, driving strips 65 are fixed above the connecting strips 63, the driving strips 65 correspond to the racks 64 one to one, when the driving strips 65 are in contact with the pressing rods 410, the pressing rods 410 are pushed to ascend, meanwhile, the second discharging pipe 44 is driven to ascend, the second sealing plate 45 is made to be in contact with the first sealing plate 43, and discharging is suspended.

Supporting blocks 66 are arranged on two sides of the U-shaped table 11, a first sliding rod 67 is fixed on the connecting strip 63, the first sliding rod 67 is connected with the supporting blocks 66 in a sliding mode, a second air cylinder 68 is fixed above the U-shaped table 11, a U-shaped rod 69 is fixed on an output shaft of the second air cylinder 68, and the U-shaped rod 69 is connected with the first sliding rod 67 in a fixed mode.

The second driving member 7 includes a supporting bar 71 fixed at symmetrical distribution, the supporting bar 71 is fixed at inner walls of two sides of the U-shaped platform 11, a second sliding bar 72 is slidably disposed on the supporting bar 71, a pressing block (not shown) is fixed at one end of the second sliding bar 72, an electric telescopic rod 75 is vertically disposed at the other end of the second sliding bar through the supporting bar 71, a second elastic member 74 is connected between the pressing block and the supporting bar 71, and when a groove on the supporting bar 82 is located below, the electric telescopic rod 75 is extended to enable an output end of the electric telescopic rod to be inserted into a corresponding groove.

The top of pressing the piece is connected with horizontally actuating lever 73, and the one end top that actuating lever 73 is close to connecting rod 46 is equipped with the fillet, realizes through pressing the piece according to the piece that forming die 8 is located the removal on receiving support 5, and actuating lever 73 promotes connecting rod 46 and rises, drives second discharging pipe 44 simultaneously and rises for second closing plate 45 and first closing plate 43 contact, the pause ejection of compact.

One side that supporting platform 1 is close to material loading platform 2 is equipped with the second connecting plate 76 of symmetric distribution, second connecting plate 76 is connected on first slide bar 67, one side that second connecting plate 76 is close to supporting platform 1 is fixed with the trigger bar 77 that is used for promoting to press the briquetting, meet the material at the shaping die cavity 81 at 8 both sides edges of forming die and accomplish the back, continuously move trigger bar 77 to being close to and pressing briquetting one side for trigger bar 77 promotes to press the briquetting to remove, realizes that forming die 8 is located the removal on receiving support 5.

When the device is used, the forming die 8 of the feeding platform 2 is pushed to the receiving support 5, the main valve 411 is opened, the first forming die groove 81 is received with plastic melt, after the plastic melt is received, the second cylinder 68 is started, the gear 61 rotates, so that the next forming die groove 81 is controlled to move to the lower side of the second discharging pipe 44, in the moving process, the second discharging pipe 44 moves upwards, the second discharging pipe 44 is in a closed state, after the plastic melt is completely received by one row of forming die grooves 81, the electric telescopic rod 75 is extended, the output end of the electric telescopic rod is inserted into the corresponding groove, the second cylinder 68 is controlled, the trigger rod 77 pushes the pressing block to move, the forming die groove 81 in the next row is moved to the lower side of the second discharging pipe 44, in the moving process, the second discharging pipe 44 moves upwards, the second discharging pipe 44 is in a closed state, after the forming die 8 receives the plastic melt, the plastic melt is pushed to the U-shaped receiving tray 32, after the plastic melt is cooled and formed on the U-shaped receiving tray 32, the first cylinder 34 is started, the U-shaped receiving tray 32 is overturned, and the plastic melt is conveyed to the upper side of the forming device 31, and demolding is completed.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. A mass injection molding process for plastic articles, the injection molding process comprising the steps of:

s1: production of plastic melt

The added plastic is hot-melted by a hot melting device to form plastic melt, the heating temperature is 160-200 ℃, stirring is carried out in the heating process, and the stirring speed is 230-280r/min;

s2: plastic molding

Injecting the plastic melt into a corresponding forming die cavity, and cooling the plastic melt after injection is finished to form the plastic, wherein the cooling time is 6-10min;

s3: demoulding of plastics

the injection molding process is characterized in that an injection molding device is used for injection molding, the injection molding device comprises a supporting platform (1) and a forming mold (8), a plurality of forming mold grooves (81) are formed in the forming mold (8), a hot melting device (4) is fixed above the supporting platform (1), and a receiving support (5) is arranged on the supporting platform (1) in a sliding mode;

the receiving support (5) is positioned below a discharge hole of the hot melting device (4), and the direction of the forming die (8) moving on the receiving support (5) is perpendicular to the sliding direction of the receiving support (5).

2. A process for mass injection molding of plastic articles according to claim 1, wherein the support platform (1) comprises a U-shaped platform (11), both side walls of the U-shaped platform (11) are provided with rectangular through holes (12), a first connecting plate (13) is connected between the side walls of the U-shaped platform (11), and the first connecting plate (13) is provided with a first slide rail (14).

3. The batch injection molding process of plastic objects according to claim 2, wherein the hot melting device (4) comprises a stirring barrel (41) with a heating function, a first discharging pipe (42) is communicated below the stirring barrel (41), a discharging port of the first discharging pipe (42) is located below the U-shaped platform (11), a main valve (411) is arranged on the first discharging pipe (42), and a first sealing plate (43) is arranged at the bottom of the first discharging pipe (42);

a second discharging pipe (44) is sleeved at one end of the discharging port of the first discharging pipe (42), a second sealing plate (45) is fixed on the inner wall of the second discharging pipe (44), when the second sealing plate (45) is in contact with the first sealing plate (43), the sealing of the discharging port of the first discharging pipe (42) is realized, and when the second sealing plate (45) is separated from the first sealing plate (43), the discharging port of the second discharging pipe (44) is discharged;

both sides of first discharging pipe (42) all are fixed with connecting rod (46), the one end of connecting rod (46) is passed rectangle through hole (12) and is equipped with depression bar (410) perpendicularly, the both sides lower extreme of depression bar (410) all is equipped with the fillet, the top of connecting rod (46) is fixed with third slide bar (47), the both sides of first discharging pipe (42) all are equipped with the connecting block, be equipped with the sliding hole on the connecting block, third slide bar (47) pass the sliding hole and are fixed with spacing block (48), be connected with first elastic component (49) between connecting block and connecting rod (46), under the effect of first elastic component (49), second closing plate (45) and first closing plate (43) separation.

4. A process for the mass injection moulding of plastic articles according to claim 3, characterized in that the support platform (1) is provided with a loading platform (2) on one side and a blanking platform (3) on the other side, the loading platform (2) being adapted to transfer the moulding cavity (81) to the receiving support (5).

5. A process for the injection moulding of batches of plastic articles according to claim 4, characterized in that to the loading platform (2) there is fixed a first driving element (6) for controlling the sliding of the receiving bracket (5), and to the loading platform (2) there is fixed a second driving element (7) for controlling the movement of the forming mould (8) on the receiving bracket (5).

6. A mass injection molding process for plastic articles according to claim 5, wherein the first driving member (6) comprises symmetrically distributed gears (61), the gears (61) are respectively located on two sides of the U-shaped table (11) to rotate, a screw rod (62) is connected between rotating shafts of the gears (61), and the screw rod (62) is in threaded fit with the receiving bracket (5);

the two sides of the U-shaped table (11) are provided with connecting strips (63) in a sliding mode, the lower ends of the connecting strips (63) are provided with racks (64) distributed in an array mode, the racks (64) are matched with the gears (61), gaps are reserved among the racks (64), driving strips (65) are fixed above the connecting strips (63), the driving strips (65) correspond to the racks (64) one by one, when the driving strips (65) are in contact with the pressure rods (410), the pressure rods (410) are pushed to ascend, meanwhile, the second discharging pipe (44) is driven to ascend, the second sealing plate (45) is made to be in contact with the first sealing plate (43), and discharging is suspended;

supporting blocks (66) are arranged on two sides of the U-shaped table (11), a first sliding rod (67) is fixed on the connecting strip (63), the first sliding rod (67) is connected with the supporting blocks (66) in a sliding mode, a second air cylinder (68) is fixed above the U-shaped table (11), a U-shaped rod (69) is fixed on an output shaft of the second air cylinder (68), and the U-shaped rod (69) is fixedly connected with the first sliding rod (67).

7. The mass injection molding process of a plastic object according to claim 5, wherein support plates (82) are fixed above two sides of the forming mold (8) and distributed in an array, grooves are formed in the support plates (82), the second driving member (7) comprises support bars (71) fixed in a symmetrical distribution, the support bars (71) are respectively fixed on inner walls of two sides of the U-shaped table (11), a second sliding rod (72) is slidably arranged on the support bars (71), a pressing block is fixed at one end of the second sliding rod (72), an electric telescopic rod (75) is vertically arranged at the other end of the second sliding rod penetrating through the support bars (71), a second elastic member (74) is connected between the pressing block and the support bars (71), and when the groove in the support plates (82) is located below, the electric telescopic rod (75) is extended to enable the output end of the electric telescopic rod to be inserted into the corresponding groove;

a horizontal driving rod (73) is connected above the pressing block, a round corner is arranged above one end, close to the connecting rod (46), of the driving rod (73), the driving rod (73) moves on the receiving support (5) through pressing of the pressing block, the driving rod (73) pushes the connecting rod (46) to ascend, and meanwhile, the driving rod drives the second discharging pipe (44) to ascend, so that the second sealing plate (45) is in contact with the first sealing plate (43);

one side that supporting platform (1) is close to material loading platform (2) is equipped with symmetric distribution's second connecting plate (76), and second connecting plate (76) are connected on first slide bar (67), and one side that second connecting plate (76) are close to supporting platform (1) is fixed with trigger bar (77) that are used for promoting to press the briquetting, connects the material to accomplish back in forming die groove (81) at forming die (8) both sides edge, lasts to being close to and presses briquetting one side removal trigger bar (77) for trigger bar (77) promote to press the briquetting to remove.

8. A process for the mass injection moulding of plastic articles according to claim 2, characterized in that the receiving bracket (5) slides with a first slide rail (14) underneath and with a U-shaped plate above.

9. The mass injection molding process of plastic objects according to claim 5 or 7, wherein the blanking platform (3) comprises a conveying device (31), one side of the conveying device (31) is rotatably provided with a U-shaped receiving tray (32), one end of an opening of the U-shaped receiving tray (32) is provided with symmetrically distributed limiting plates (33), the conveying device (31) is rotatably provided with a first air cylinder (34), an output shaft of the first air cylinder (34) is rotatably connected with the U-shaped receiving tray (32), the first air cylinder (34) is used for controlling the U-shaped receiving tray (32) to turn over, when the U-shaped receiving tray (32) rotates to the position above the conveying device (31), the opening of the U-shaped receiving tray (32) faces downwards, and when the U-shaped receiving tray (32) rotates to the position with the opening upwards, the U-shaped receiving tray is collinear with the feeding platform (2).