CN113997507A

CN113997507A - Production process of polypropylene plastic bowl

Info

Publication number: CN113997507A
Application number: CN202111283692.1A
Authority: CN
Inventors: 柏志平
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-02-01

Abstract

The invention belongs to the technical field of plastic production and manufacturing, and particularly relates to a polypropylene plastic bowl production process which is completed by matching plastic bowl production equipment, wherein the plastic bowl production equipment comprises a processing box, a feeding hopper is fixedly arranged at the upper end inside the processing box, a stirring and drying part is arranged below the feeding hopper and used for stirring, mixing and rotating and drying raw materials, a refrigerating part is arranged below the stirring and drying part and used for refrigerating and blanking the raw materials, a melting part is arranged below the refrigerating part and used for melting the raw materials and removing bubbles in a solution, an injection molding part is arranged below the melting part and used for injection molding, and a finish machining part is arranged on one side of the injection molding part and used for polishing and cleaning the plastic bowl. The invention can rotate and extrude the solution to discharge the gas in the solution, and prevent the plastic bowl from injection molding bubbles; the plastic bowl is cooled and formed evenly when being injection molded, which is beneficial to the even wall thickness of the plastic bowl.

Description

Production process of polypropylene plastic bowl

Technical Field

The invention belongs to the technical field of plastic production and manufacturing, and particularly relates to a production process of a polypropylene plastic bowl.

Background

The plastic bowl is a nontoxic and harmless bowl made of edible PP materials, is usually found in the catering industry, and is deeply favored by people on the basis of the characteristics of light texture, attractive appearance, low cost, strong plasticity and the like. The plastic bowls produced by the existing plastic bowl production equipment are generally poor in toughness, general in product glossiness and transparency, and air bubbles in a plastic solution cannot be removed cleanly.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a production process of a polypropylene plastic bowl, which can rotate and extrude a solution to discharge gas in the solution and prevent the plastic bowl from forming bubbles by injection molding; the plastic bowl is uniformly cooled and formed when being subjected to injection molding, so that the uniform wall thickness of the plastic bowl is facilitated; the plastic bowl is polished to remove burrs, and is cleaned and dried comprehensively, so that the plastic bowl is used favorably.

The purpose of the invention can be realized by the following technical scheme: a production process of a polypropylene plastic bowl comprises the following steps:

s1, feeding, namely, putting a proper amount of raw materials into a processing box through a feeding hopper;

s2, mixing and drying, stirring and mixing the raw materials, and rotationally drying the raw materials;

s3: freezing, freezing and storing the mixed raw materials for a period of time;

s4: mixing and melting, and then adding some raw materials for mixing, melting and exhausting;

s5: injection molding, namely injecting the solution into a mold through pressing, and cooling and molding;

s6: polishing and cleaning, and performing finish machining and cleaning on the formed bowl;

s7, taking out the package, and conveying the plastic bowl out for packaging through a conveying mechanism;

the steps S1-S7 are completed by matching plastic bowl production equipment, the plastic bowl production equipment comprises a processing box, a feeding hopper is fixedly arranged at the upper end inside the processing box, a stirring and drying part is arranged below the feeding hopper and is used for stirring, mixing and rotating and drying raw materials, a refrigerating part is arranged below the stirring and drying part and is used for refrigerating and blanking the raw materials, a melting part is arranged below the refrigerating part and is used for melting the raw materials fed and removing bubbles in solution, an injection molding part is arranged below the melting part and is used for injection molding, and a finish machining part is arranged on one side of the injection molding part and is used for polishing and cleaning the plastic bowl.

Preferably, the stirring and drying component comprises a first motor, the first motor is fixed on one side inside the processing box, a first linkage column is fixedly arranged on the first motor in the middle direction inside the processing box, a rotating cylinder is fixedly arranged on the outer circumferential surface of the first linkage column, a heating cavity is arranged inside the first linkage column, a heating block is fixedly arranged in the heating cavity, a plurality of stirring columns are uniformly arranged on the outer circumferential surface of the first linkage column in the rotating cylinder in a sliding mode, air outlet channels are arranged in the stirring columns and connected with the heating cavity, air outlet valves are connected with the outer portions of the stirring columns and connected with the air outlet channels, a fan is fixedly arranged on the outer circumferential surface of the first linkage column far away from the first motor, an air suction disc is fixedly arranged on the outer circumferential surface of the first linkage column between the rotating cylinder and the fan, air suction channels are arranged in the air suction disc and connected with the heating cavity, and an exhaust valve is arranged at one end of the rotating cylinder towards the fan.

Preferably, cold-stored part includes the fixed block, and the fixed block is located first linkage post below, and the fixed block is fixed on the processing case, is equipped with the cold-stored chamber in the fixed block, and cold-stored chamber upper end is equipped with sliding seal board on the fixed block.

Preferably, melt the part including melting the chamber, melt the chamber and be located inside the cold-stored chamber below fixed block, melt the chamber and connect with cold-stored chamber and be equipped with the unloading passageway, it is equipped with feedstock channel with processing case external connection to melt chamber one side, it is equipped with the second motor to melt the chamber top, the second motor is fixed in the fixed block, the second motor lower extreme has set firmly first flexible rotation post, first flexible rotation post is at fixed block internal rotation connection, first flexible rotation post lower extreme has set firmly the clamp plate, the clamp plate is melting the intracavity and is rotating and connect.

Preferably, it is equipped with a plurality of sliders to slide in the clamp plate, it is equipped with three exhaust slider to slide in the slider, be equipped with exhaust passage in the exhaust slider, it is equipped with the slip needle to slide in the exhaust passage, be equipped with the exhaust chamber in the slider, the exhaust chamber is connected with exhaust passage, it is equipped with a plurality of rotary columns to rotate on the clamp plate, a plurality of rotary drums have set firmly between a plurality of rotary columns, the rotary drum rotates on the clamp plate and connects, it is equipped with a plurality of stirring sliders to slide on the rotary drum, be equipped with the discharge opening in the stirring slider, the discharge opening both sides are equipped with the feed port, be equipped with the outlet duct in the rotary drum, it is equipped with the exhaust hole to be connected between outlet duct and the discharge opening, the outlet duct is connected with the exhaust chamber.

Preferably, the injection molding part comprises an upper mold, the upper mold is located at the lower end of the fixing block, a sliding telescopic seat is arranged below the upper mold, the sliding telescopic seat slides on the processing box, a lower mold is fixedly arranged at the upper end of the sliding telescopic seat, a mold core is arranged between the upper mold and the lower mold, a pressing channel is connected between the mold core and the melting cavity, two water cavities are arranged on two sides of the mold core in the lower mold, a cooling channel is arranged on the periphery of the mold core, a water adding valve is connected between the water cavities and the cooling channel, and a water inlet valve is connected between the cooling channel and the mold core.

Preferably, the finish machining part comprises a fourth motor, the fourth motor is located on one side of the lower end of the fixed block, a third telescopic rotating column is fixedly arranged at the lower end of the fourth motor, a polishing block is fixedly arranged at the lower end of the third telescopic rotating column, an air pump is fixedly arranged in the third telescopic rotating column, a discharge valve is arranged at the lower end of the polishing block and connected with the air pump, a drying cavity is arranged above two sides of the discharge valve, a discharge valve is arranged between the air pump and the drying cavity in a connected mode, and the discharge valve is externally connected with the polishing block.

Preferably, an outlet is arranged below the fourth motor, the outlet is rotatably connected to the processing box, a conveying mechanism is arranged on one side of the outlet of the processing box, and an outlet sliding plate is arranged in the conveying mechanism in a sliding mode.

Has the advantages that:

1. through melting the part setting, rotate the gas in the extrusion discharge solution to solution, prevent plastic bowl injection moulding bubble.

2. Through the setting of the injection molding part, the plastic bowl is uniformly cooled and molded during injection molding, and the wall thickness uniformity of the plastic bowl is facilitated.

3. Through the setting of finish machining part, polish the burring to the plastic bowl, wash the plastic bowl of drying comprehensively, be favorable to the use of plastic bowl.

Drawings

The invention is further explained below with reference to the figures and examples:

FIG. 1 is a flow chart of the method of the present invention.

Fig. 2 is a schematic isometric view of the present invention.

Fig. 3 is a schematic structural view in front view of the present invention.

Fig. 4 is a schematic sectional view at a-a in fig. 3.

Fig. 5 is a schematic view of a portion B in fig. 4.

Fig. 6 is a schematic view of a portion C in fig. 4.

Fig. 7 is a schematic view of a portion D in fig. 4.

Fig. 8 is a schematic view of a portion at E in fig. 4.

Fig. 9 is a schematic view of a portion at F in fig. 4.

In the figure, a processing box 10, a stirring and drying part 11, a refrigerating part 12, a melting part 13, an injection molding part 14, a finishing part 15, a feeding hopper 16, a first motor 17, a first linkage column 18, a rotating cylinder 19, a heating cavity 20, a heating block 21, a stirring column 22, an air outlet channel 23, an air outlet valve 24, a fan 25, an air suction disc 26, an air suction channel 27, an air exhaust valve 28, a fixed block 29, a refrigerating cavity 30, a sliding sealing plate 31, a blanking channel 32, a melting cavity 33, a second motor 34, a first telescopic rotating column 35, a pressing plate 36, a feeding channel 37, a sliding block 38, an air exhaust sliding block 39, a sliding needle 40, an air exhaust channel 41, an air exhaust cavity 42, a rotating column 43, a rotating cylinder 44, a stirring sliding block 45, an air outlet hole 46, a feeding hole 47, an air exhaust hole 48, an air outlet pipe 49, a pressing channel 50, an upper die 51, a lower die 52, a water cavity 53, a water adding valve 54, a cooling channel 55, a water inlet valve 56, a water outlet valve 46, a water outlet valve, a water outlet, The device comprises a core 57, a third motor 58, a second telescopic rotating column 59, a drain pan 60, a water outlet valve 61, a drain channel 62, a fourth motor 63, a third telescopic rotating column 64, a sliding telescopic seat 65, a grinding block 66, an air pump 67, a drain valve 68, a water outlet valve 69, a drying cavity 70, a drying block 71, an outlet 72, a conveying mechanism 73 and an outlet sliding plate 74.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

With reference to fig. 1-9, a process for producing a polypropylene plastic bowl comprises the following steps:

the steps S1-S7 are completed by matching plastic bowl production equipment, the plastic bowl production equipment comprises a processing box 10, a feeding hopper 16 is fixedly arranged at the upper end inside the processing box 10, a stirring and drying part 11 is arranged below the feeding hopper 16 and used for stirring, mixing and rotating and drying raw materials, a refrigerating part 12 is arranged below the stirring and drying part 11 and used for refrigerating and blanking the raw materials, a melting part 13 is arranged below the refrigerating part 12 and used for melting the raw materials in feeding and removing bubbles in solution, an injection molding part 14 is arranged below the melting part 13 and used for injection molding, and a finish machining part 15 is arranged on one side of the injection molding part 14 and used for polishing and cleaning the plastic bowls.

Further, referring to fig. 1-9, the stirring and drying component 11 includes a first motor 17, the first motor 17 is fixed on one side inside the processing box 10, the first motor 17 is fixedly provided with a first linkage column 18 towards the middle inside the processing box 10, a rotating cylinder 19 is fixedly provided on the outer circumferential surface of the first linkage column 18, a heating cavity 20 is provided inside the first linkage column 18, a heating block 21 is fixedly provided inside the heating cavity 20, the first linkage column 18 is provided with a plurality of stirring columns 22 uniformly sliding on the outer circumferential surface inside the rotating cylinder 19, an air outlet channel 23 is provided in the stirring column 22, the air outlet channel 23 is connected with the heating cavity 20, an air outlet valve 24 is provided outside the stirring column 22, a fan 25 is fixedly provided on the outer circumferential surface of the first linkage column 18 away from the first motor 17, an air suction disc 26 is fixedly provided on the outer circumferential surface of the first linkage column 18 between the rotating cylinder 19 and the fan 25, an air suction channel 27 is provided in the air suction disc 26, an air suction channel 27 is connected to the heating chamber 20 and the rotary drum 19 is provided with an air discharge valve 28 towards the end of the fan 25.

Further, referring to fig. 1 to 9, the refrigeration unit 12 includes a fixed block 29, the fixed block 29 is located below the first linking column 18, the fixed block 29 is fixed on the processing box 10, a refrigeration cavity 30 is provided in the fixed block 29, and a sliding sealing plate 31 is slidably provided on the fixed block 29 at the upper end of the refrigeration cavity 30.

Further, with reference to fig. 1 to 9, the melting part 13 includes a melting chamber 33, the melting chamber 33 is located inside the fixing block 29 below the refrigerating chamber 30, the melting chamber 33 is connected with the refrigerating chamber 30 and provided with a blanking passage 32, one side of the melting chamber 33 is connected with the outside of the processing box 10 and provided with a feeding passage 37, the melting chamber 33 is provided with a second motor 34 above, the second motor 34 is fixed inside the fixing block 29, the lower end of the second motor 34 is fixedly provided with a first telescopic rotating column 35, the first telescopic rotating column 35 is rotatably connected inside the fixing block 29, the lower end of the first telescopic rotating column 35 is fixedly provided with a pressing plate 36, and the pressing plate 36 is rotatably connected inside the melting chamber 33.

Further, with reference to fig. 1 to 9, a plurality of sliders 38 are slidably disposed in the pressing plate 36, three exhaust sliders 39 are slidably disposed in the sliders 38, exhaust passages 41 are disposed in the exhaust sliders 39, sliding needles 40 are slidably disposed in the exhaust passages 41, exhaust cavities 42 are disposed in the sliders 38, the exhaust cavities 42 are connected to the exhaust passages 41, a plurality of rotating columns 43 are rotatably disposed on the pressing plate 36, a plurality of rotating cylinders 44 are fixedly disposed between the rotating columns 43, the rotating cylinders 44 are rotatably connected to the pressing plate 36, a plurality of stirring sliders 45 are slidably disposed on the rotating cylinders 44, discharge holes 46 are disposed in the stirring sliders 45, feed holes 47 are disposed on two sides of the discharge holes 46, air outlet pipes 49 are disposed in the rotating cylinders 44, exhaust holes 48 are connected between the air outlet pipes 49 and the discharge holes 46, and the air outlet pipes 49 are connected to the exhaust cavities 42.

Further, referring to fig. 1 to 9, the injection part 14 includes an upper mold 51, the upper mold 51 is located at the lower end of the fixing block 29, a sliding telescopic seat 65 is provided below the upper mold 51, the sliding telescopic seat 65 slides on the processing box 10, a lower mold 52 is fixedly provided at the upper end of the sliding telescopic seat 65, a mold core 57 is provided between the upper mold 51 and the lower mold 52, a lower pressing channel 50 is provided between the mold core 57 and the melting cavity 33, two water cavities 53 are provided at two sides of the mold core 57 in the lower mold 52, a cooling channel 55 is provided at the periphery of the mold core 57, a water feeding valve 54 is provided between the water cavity 53 and the cooling channel 55, and a water feeding valve 56 is provided between the cooling channel 55 and the mold core 57.

Further, with reference to fig. 1-9, the finishing component 15 includes a fourth motor 63, the fourth motor 63 is located on one side of the lower end of the fixed block 29, a third telescopic rotating column 64 is fixedly disposed at the lower end of the fourth motor 63, a polishing block 66 is fixedly disposed at the lower end of the third telescopic rotating column 64, an air pump 67 is fixedly disposed in the third telescopic rotating column 64, a discharge valve 68 is disposed at the lower end of the polishing block 66, the discharge valve 68 is connected with the air pump 67, a drying chamber 70 is disposed above two sides of the discharge valve 68, a discharge valve 69 is disposed between the air pump 67 and the drying chamber 70, and the discharge valve 69 is externally connected with the polishing block 66.

Further, referring to fig. 1-9, an outlet 72 is disposed below the fourth motor 63, the outlet 72 is rotatably connected to the processing box 10, a conveying mechanism 73 is disposed on one side of the processing box 10 facing the outlet 72, and an outlet slide plate 74 is slidably disposed in the conveying mechanism 73.

Principle of operation

S1, feeding, namely, putting a proper amount of raw materials into the processing box 10 through the feeding hopper 16, opening the rotary drum 19, enabling the raw materials to enter the rotary drum 19, and closing the rotary drum 19.

S2, mixing and drying, wherein the first motor 17 is started to drive the rotating cylinder 19 to rotate through the rotation of the first linkage column 18, the rotating cylinder 19 rotates to move the raw materials up and down, the first linkage column 18 rotates to drive the stirring column 22 to rotate to fully stir and mix the raw materials, the first linkage column 18 rotates to drive the fan 25 to rotate, the fan 25 rotates to convey gas to enter the heating cavity 20 through the gas suction channel 27, the heating block 21 heats the gas in the heating cavity 20, the hot gas enters the gas outlet channel 23, and the raw materials are subjected to rotating and drying effects through the heat conduction of the stirring column 22 and the hot gas exhausted through the gas outlet valve 24.

S3: in the freezing process, the sliding sealing plate 31 slides on the fixed block 29 to be opened, the rotary drum 19 is opened to drop the dried and mixed raw materials into the refrigerating cavity 30, the sliding sealing plate 31 slides on the fixed block 29 to be closed, and the raw materials are frozen in the refrigerating cavity 30 for a period of time.

S4: mixing and melting, namely completing freezing of raw materials, blanking the raw materials into a melting cavity 33 through a blanking channel 32, heating and melting the raw materials, and adding some additives into the melting cavity 33 through a feeding channel 37 for mixing, heating and melting; the first telescopic rotating column 35 stretches and retracts to descend to push the pressing plate 36 to contact with the solution, the second motor 34 is started to drive the pressing plate 36 to rotate through rotation of the first telescopic rotating column 35 to extrude and rotate the solution, the sliding block 38 slides down in the pressing plate 36, the sliding needle 40 slides down in the sliding block 38, the sliding needle 40 slides out to puncture small bubbles in the solution, the gas enters the exhaust cavity 42 through the exhaust channel 41 to be discharged, the rotating column 43 rotates to drive the rotating drum 44 to rotate, the rotating drum 44 rotates to drive the stirring sliding block 45 to slide out and rotate to puncture large bubbles in the solution, the gas enters the exhaust hole 48 through the discharge hole 46, the gas is discharged through the exhaust pipe 49, the solution on the two sides is sucked through the feed hole 47, and the large bubbles are discharged through the discharge hole 46 to fill the position of the large bubbles.

S5: injection molding, wherein the sliding telescopic seat 65 slides on the processing box 10 to the position below the lower pressing channel 50, the sliding telescopic seat 65 telescopically pushes the lower die 52 and the upper die 51 to be closed, the first telescopic rotating column 35 telescopically descends to push the pressing plate 36 to press downwards so as to inject a solution into the mold core 57 through the lower pressing channel 50, water in the water cavity 53 enters the cooling channel 55 through the water adding valve 54, and uniform cooling molding is performed through the water in the cooling channel 55;

s6: polishing and cleaning, wherein a sliding telescopic seat 65 telescopically pushes a lower die 52 and an upper die 51 to be separated, the sliding telescopic seat 65 slides below a fourth motor 63 on a processing box 10, a third telescopic rotating column 64 telescopically pushes a polishing block 66 to enter a formed plastic bowl, the fourth motor 63 rotates to drive the polishing block 66 to rotate through the rotation of the third telescopic rotating column 64 to polish the inside of the plastic bowl in a rotating manner, an air pump 67 starts to suck the plastic bowl through a drain valve 68, the plastic bowl is driven to rotate through the rotation of the polishing block 66 to be matched with the lower die 52 to be fixed, the outside of the plastic bowl is polished, and a third motor 58 starts to drive a drain pan 60 to rotate through the rotation of a second telescopic rotating column 59 to polish the bottom of the plastic bowl; the air pump 67 discharges air from two sides of the plastic through the outlet valve 69, the polished powder is blown to the bottom of the plastic bowl, the air pump 67 sucks the powder through the exhaust valve 68, water is added into the plastic bowl through the outlet valve 69 for cleaning, sewage is discharged through the exhaust valve 68, water in the cooling channel 55 enters the mold core 57 through the water inlet valve 56 to clean the outside of the plastic bowl, the sewage enters the drainage channel 62 through the water outlet valve 61 for discharging, the plastic bowl is cleaned, the drying block 71 is heated, a part of hot air is discharged through the outlet valve 69 for air drying the plastic bowl, a part of hot air enters the drying cavity 70 for heating the polishing block 66, the plastic bowl is dried through the drying cavity 70, the plastic drying is completed, the air pump 67 sucks the plastic bowl through the exhaust valve 68, the third telescopic rotating column 64 is telescopic and ascends to drive the polishing block 66 to ascend in cooperation with the second telescopic rotating column 59 to stretch and push the plastic bowl to ascend through the drainage tray 60, the sliding telescopic base 65 slides to the lower part of the downward pressing channel 50 on the processing box 10, and the third telescopic rotating column 64 is telescopic and ascended to drive the grinding block 66 to descend, so that the plastic bowls are stably placed at the upper end of the outlet 72.

And S7, taking out the package, opening the outlet sliding plate 74 on the processing box 10 in a sliding way, starting the outlet 72 to convey the plastic bowls, and conveying the plastic bowls out of the processing box 10 through the conveying mechanism 73.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A production process of a polypropylene plastic bowl is characterized by comprising the following steps:

step S1-S7 adopt a plastics bowl production facility cooperation to accomplish, and this plastics bowl production facility is including processing case (10), processing case (10) inside upper end has set firmly feed hopper (16), feed hopper (16) below is equipped with stirring stoving part (11) and stirs mixture and rotation stoving effect to raw and other materials, stirring stoving part (11) below is equipped with cold-stored part (12) and refrigerates the unloading to raw and other materials, cold-stored part (12) below is equipped with melts part (13) and melts and get rid of the bubble in the solution to raw and other materials feeding, it is equipped with injection moulding part (14) below and carries out injection moulding to melt part (13), it is equipped with finish machining part (15) and polishes and cleaning action to the plastics bowl to mould plastics part (14) one side.

2. A process for producing a polypropylene plastic bowl according to claim 1, wherein: stirring stoving part (11) includes first motor (17), first motor (17) are fixed in the inside one side of processing case (10), first motor (17) have set firmly first linkage post (18) to the inside middle direction of processing case (10), a rotation section of thick bamboo (19) has set firmly on first linkage post (18) outer periphery, first linkage post (18) inside is equipped with heating chamber (20), heating chamber (20) internal fixation has heating piece (21), first linkage post (18) evenly slides on the outer periphery in a rotation section of thick bamboo (19) and is equipped with a plurality of stirring posts (22), be equipped with air outlet channel (23) in stirring post (22), air outlet channel (23) are connected with heating chamber (20), air outlet channel (23) and stirring heating chamber (22) external connection are equipped with air outlet valve (24), fan (25) have set firmly on first linkage post (18) keeps away from the face of first motor (17) direction, first linkage post (18) have set firmly on the outer periphery between a rotation section of thick bamboo (19) and fan (25) and have inhaled dish (26), be equipped with air suction channel (27) in air suction dish (26), air suction channel (27) are connected with heating chamber (20), rotate a section of thick bamboo (19) and are equipped with discharge valve (28) to fan (25) one end.

3. A process for producing a polypropylene plastic bowl according to claim 2, wherein: the refrigeration part (12) comprises a fixing block (29), the fixing block (29) is located below the first linkage column (18), the fixing block (29) is fixed on the processing box (10), a refrigeration cavity (30) is arranged in the fixing block (29), and a sliding sealing plate (31) is arranged at the upper end of the refrigeration cavity (30) in a sliding mode on the fixing block (29).

4. A process for producing a polypropylene plastic bowl according to claim 3, wherein: melt part (13) including melting chamber (33), it is located inside cold storage chamber (30) below fixed block (29) to melt chamber (33), it is equipped with unloading passageway (32) to melt chamber (33) and cold storage chamber (30) connection, it is equipped with feedstock channel (37) with processing case (10) external connection to melt chamber (33) one side, it is equipped with second motor (34) to melt chamber (33) top, second motor (34) are fixed in fixed block (29), second motor (34) lower extreme has set firmly first flexible rotation post (35), first flexible rotation post (35) is at fixed block (29) internal rotation connection, first flexible rotation post (35) lower extreme has set firmly clamp plate (36), clamp plate (36) are melting chamber (33) internal rotation connection.

5. A process for producing a polypropylene plastic bowl as claimed in claim 4, wherein: a plurality of sliding blocks (38) are arranged in the pressing plate (36) in a sliding manner, three exhaust sliding blocks (39) are arranged in the sliding blocks (38) in a sliding manner, exhaust passages (41) are arranged in the exhaust sliding blocks (39), sliding needles (40) are arranged in the exhaust passages (41) in a sliding manner, exhaust cavities (42) are arranged in the sliding blocks (38), the exhaust cavities (42) are connected with the exhaust passages (41), a plurality of rotating columns (43) are arranged on the pressing plate (36) in a rotating manner, a plurality of rotating cylinders (44) are fixedly arranged among the rotating columns (43), the rotating cylinders (44) are connected on the pressing plate (36) in a rotating manner, a plurality of stirring sliding blocks (45) are arranged on the rotating cylinders (44) in a sliding manner, discharge holes (46) are arranged in the stirring sliding blocks (45), feed holes (47) are arranged on two sides of the discharge holes (46), and air outlet pipes (49) are arranged in the rotating cylinders (44), an exhaust hole (48) is connected between the air outlet pipe (49) and the discharge hole (46), and the air outlet pipe (49) is connected with the exhaust cavity (42).

6. A process for producing a polypropylene plastic bowl as claimed in claim 5, wherein: injection molding part (14) includes mould (51), it is located fixed block (29) lower extreme to go up mould (51), it is equipped with slip flexible seat (65) to go up mould (51) below, slip flexible seat (65) slide on processing case (10), slip flexible seat (65) upper end has set firmly bed die (52), it is equipped with core (57) to go up between mould (51) and bed die (52), core (57) and melting are connected between chamber (33) and are equipped with down passageway (50), bed die (52) inner core (57) both sides are equipped with two water cavity (53), core (57) periphery is equipped with cooling channel (55), it is equipped with water feeding valve (54) to be connected between water cavity (53) and cooling channel (55), it is equipped with water intaking valve (56) to connect between cooling channel (55) and core (57).

7. A process for producing a polypropylene plastic bowl as claimed in claim 6, wherein: finish machining part (15) includes fourth motor (63), fourth motor (63) are located fixed block (29) lower extreme one side, fourth motor (63) lower extreme has set firmly the flexible rotation post of third (64), the flexible rotation post of third (64) lower extreme has set firmly sanding block (66), the flexible rotation post of third (64) internal setting has air pump (67), sanding block (66) lower extreme is equipped with blow-off valve (68), blow-off valve (68) are connected with air pump (67), blow-off valve (68) both sides top is equipped with stoving chamber (70), it is equipped with out valve (69) to connect between air pump (67) and stoving chamber (70), go out valve (69) and sanding block (66) external connection.

8. A process for producing a polypropylene plastic bowl as claimed in claim 7, wherein: an outlet (72) is arranged below the fourth motor (63), the outlet (72) is rotatably connected to the processing box (10), a conveying mechanism (73) is arranged on one side, facing the outlet (72), of the processing box (10), and an outlet sliding plate (74) is arranged in the conveying mechanism (73) in a sliding mode.