Injection molding processing aid for plastic production

Abstract

The application relates to the technical field of injection molding, and particularly discloses an injection molding processing auxiliary equipment for plastic production, which comprises an equipment base, a supporting seat fixedly installed at the top of the equipment base, a hot melting assembly and a drying assembly arranged in the supporting seat, and a motor one fixedly installed at the outer side of the supporting seat; the hot melting assembly comprises a hot melting barrel, a heat recovery mechanism, a feeding mechanism and a connecting seat; the shear force is formed by the reverse rotation of the cutter seat one and the cutter seat two, the raw materials are crushed and mixed, and the particles with uniform particle sizes are formed; at the same time, when the reciprocating screw rod drives the movable seat to move upwards to extrude the sealing plate, the air in the limiting seat flows rapidly, the sealing is removed by the sealing block driven by the connecting pipe, the preheated air between the hot melting barrel and the sleeve flows into the screening seat, the particles with qualified particle sizes are blown to the connecting seat through the gap between the supporting sleeve and the screening seat during the pre-drying of the plastic particles, the drying and the screening are synchronized, the drying degree and the particle size precision of the raw materials are ensured, and the subsequent hot melting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the injection molding technical field, in particular to an injection molding processing auxiliary equipment for plastic production. BACKGROUND

[0002] The injection molding processing of plastic is a mainstream manufacturing process for realizing the precision molding of plastic products by accurately controlling a temperature field, a pressure field and time parameters on the basis of polymer materials, mainly including the compaction and forward movement driven by the rotation of a screw, the cooperation of screw shearing friction and external heating of a cylinder, the gradual melting of plastic, the rapid filling of the melt with fluidity into a mold cavity by the high pressure of an injection system, the solidification and setting of the melt by the heat exchange of a cooling system, and finally the plastic products with predetermined geometric shapes and size precision.

[0003] In the plasticizing stage, if the water content of the raw material exceeds the standard, the water will rapidly vaporize to form air gaps at high temperature, thereby reducing the friction coefficient between the screw and the material, causing the screw to slip, resulting in the decrease of plasticizing efficiency and the inaccuracy of metering, and at the same time, the heat insulation layer formed by the water vapor hinders the heat transfer, leading to the local overheating or uneven plasticizing of the melt, causing the viscosity fluctuation of the melt, and affecting the stability of the subsequent injection molding and the product quality.

[0004] Therefore, it is necessary to provide an injection molding processing auxiliary equipment for plastic production, which aims to solve the above problems. SUMMARY

[0005] The main purpose of the application is to provide an injection molding processing auxiliary equipment for plastic production, which can effectively solve the problems in the background art.

[0006] To achieve the above purpose, the technical scheme adopted by the application is as follows:

[0007] An injection molding processing auxiliary equipment for plastic production, comprising a device base, a support seat is fixedly installed on the top of the device base, a hot melting assembly and a drying assembly are arranged in the inside of the support seat, a motor one is fixedly installed on the outside of the support seat, the hot melting assembly comprises a hot melting cylinder and a heat recovery mechanism, a screw rod is rotatably connected in the inside of the hot melting cylinder, the hot melting cylinder is fixedly installed in the inside of the support seat, the drying assembly comprises a discharge hopper, a support sleeve and a screening seat, the support sleeve is fixedly installed in the inside of the support seat, the discharge hopper is fixedly installed on the top of the support sleeve, the screening seat is fixedly connected to the bottom of the discharge hopper, and a stirring mechanism and a reciprocating mechanism are arranged in the inside of the support sleeve.

[0008] The heat recovery mechanism comprises a sleeve and a sealing seat, the sleeve is fixedly installed on the outside of the support seat, the sealing seat is fixedly connected to the outside of the sleeve, and a sealing block is slidably connected in the inside of the sealing seat.

[0009] The reciprocating mechanism comprises a limiting seat and a sealing plate, the limiting seat is fixedly connected to the bottom of the screening seat, the sealing plate is symmetrically and slidingly connected to the inner part of the limiting seat, the inner part of the limiting seat is also slidingly connected with a movable seat, the movable seat is in sealing contact with the two sealing plates and pushes the two sealing plates to move upward.

[0010] As a further improvement of the above-mentioned scheme, the outer side of the feeding hopper and the supporting sleeve is fixedly installed with a mounting seat, the mounting seat is fixedly installed on the top of the supporting seat, the top of the feeding hopper is fixedly installed with a sealing cover, the top of the sealing cover is fixedly installed with a motor two.

[0011] As a further improvement of the above-mentioned scheme, the bottom of the movable seat is slidingly connected with a movable block, the bottom of the limiting seat is penetratingly and rotationally connected with the movable block, a push rod is rotationally connected between the movable seat and the movable block, the limiting seat and the connecting seat are in communication with each other, the bottom of the limiting seat is rotationally connected with a reciprocating screw rod, and a screw pair transmission is formed between the movable block and the reciprocating screw rod.

[0012] As a further improvement of the above-mentioned scheme, the hot melting assembly further comprises a feeding mechanism and a connecting seat, the connecting seat is fixedly connected to the top of one end of the hot melting barrel in the supporting seat and is internally communicated, the connecting seat and the hot melting barrel are fixedly connected to the bottom of the supporting sleeve, the supporting sleeve and the connecting seat are in communication with each other, and the limiting seat and the sealing block are in communication with each other through the fixedly installed connecting pipe.

[0013] As a further improvement of the above-mentioned scheme, the feeding mechanism comprises a limiting sleeve and a transmission shaft, the limiting sleeve is slidingly connected to the outer side of the transmission shaft through a spline, the limiting sleeve is fixedly connected to the outer side of the hot melting barrel, the inner part of the limiting sleeve is slidingly connected with a movable sleeve and a pushing block, the movable sleeve is rotationally connected to the outer side of the limiting rod, a spring one is fixedly connected between the movable sleeve and the pushing block, the outer side of the transmission shaft is provided with a reciprocating screw thread, a screw pair transmission is formed between the pushing block and the transmission shaft, and the transmission shaft and the reciprocating screw rod are transmissionally connected through a synchronous belt.

[0014] As a further improvement of the above-mentioned scheme, the outer side of the pushing block is symmetrically fixedly connected with a limiting rod, and the limiting rod is penetratingly and slidingly connected to the inner part of the movable sleeve.

[0015] As a further improvement of the above-mentioned scheme, the inner part of the limiting sleeve is symmetrically provided with a clamping block, a spring two is fixedly connected between the clamping block and the inner wall of the limiting sleeve, and the outer side of the limiting rod is fixedly connected with a pushing block.

[0016] As a further improvement of the above-mentioned scheme, the stirring mechanism comprises a driving shaft rotatably connected to the inside of the sealing cover, one end of the driving shaft is fixedly connected with a stirring rod in the lower hopper, the bottom of the driving shaft is fixedly connected with a cutter seat one, and the cutter seat one and the screening seat are rotatably connected with a cutter seat two.

[0017] As a further improvement of the above-mentioned scheme, the bottom of the cutter seat one is fixedly connected with a driving wheel, the driving wheel is engaged with the cutter seat two through a driven wheel, and the driven wheel is rotatably installed at the bottom of the screening seat.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] After the plastic falls into the screening seat through the lower hopper, the cutter seat one and the cutter seat two rotate in opposite directions to form a shearing force, completing the crushing and mixing of the raw materials and forming particles with uniform particle size. At the same time, the reciprocating screw rod drives the movable seat to move reciprocally, when it moves upward to press the sealing plate, the air in the limiting seat flows rapidly, the sealing block is driven to unseal through the connecting pipe, the preheated air between the hot melt cylinder and the sleeve pipe flows into the screening seat, the hot air stream pre-dries the plastic particles at the same time, and the particles with qualified particle size are blown to the connecting seat through the gap between the supporting sleeve and the screening seat, realizing the synchronization of drying and screening, ensuring the drying degree and particle size precision of the raw materials, and improving the subsequent hot melting efficiency.

[0020] The motor one drives the feeding mechanism to rotate through the transmission shaft, realizing the feeding and conveying of the plastic particles. When the pushing block reaches the specified position, the spring one drives the pushing block to push the clamping block, unsealing the limiting constraint of the movable sleeve. At this time, the movable sleeve moves axially under the elastic force of the spring one, pushes and sprays the hot melt plastic melt, and improves the spraying efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is the overall structure schematic diagram of the present application;

[0023] Figure 2 It is the structure schematic diagram of the hot melting assembly and the drying assembly of the present application;

[0024] Figure 3 It is the structure schematic diagram of A in the present application; Figure 2

[0025] Figure 4 ​The internal structure diagram of the support seat of the application;

[0026] Figure 5 The structure diagram of the heat recovery mechanism of the application;

[0027] Figure 6 The structure diagram of the drying assembly of the application;

[0028] Figure 7 The structure diagram of the screening seat of the application;

[0029] Figure 8 The structure diagram of the reciprocating mechanism of the application;

[0030] Figure 9 The structure diagram of the feeding mechanism of the application;

[0031] Figure 10 The internal structure diagram of the limiting sleeve of the application.

[0032] In the figure: 1, device base; 2, support seat; 3, hot melting assembly; 31, hot melting barrel; 32, heat recovery mechanism; 321, sleeve; 322, sealing seat; 323, sealing block; 324, connecting pipe; 33, feeding mechanism; 331, limiting sleeve; 332, movable sleeve; 333, pushing block; 334, transmission shaft; 335, spring one; 336, limiting rod; 337, clamping block; 338, spring two; 339, pushing block; 34, connecting seat; 35, synchronous belt; 36, screw rod; 4, motor one; 5, drying assembly; 51, discharge hopper; 52, mounting seat; 53, support sleeve; 54, sealing cover; 55, motor two; 56, stirring mechanism; 561, driving shaft; 562, stirring rod; 563, knife seat one; 564, knife seat two; 565, driving wheel; 566, driven wheel; 57, screening seat; 58, reciprocating mechanism; 581, limiting seat; 582, sealing plate; 583, movable seat; 584, movable block; 585, push rod; 586, reciprocating screw rod. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0034] Please refer to Figures 1 to 10 The application provides an embodiment as shown in the figure:

[0035] The utility model provides an injection moulding processing auxiliary equipment of plastic production, including equipment base 1, the top of equipment base 1 is fixedly installed with support seat 2, the inside of support seat 2 is provided with hot melt subassembly 3 and drying subassembly 5, the outside of support seat 2 is fixedly installed with motor no.

[0036] Hot recovery mechanism 32 includes sleeve 321 and sealing seat 322, sleeve 321 is fixedly installed on the outside of support seat 2, sealing seat 322 is fixedly connected on the outside of sleeve 321, the inside of sealing seat 322 is slidably connected with sealing block 323;

[0037] Reciprocating mechanism 58 includes limiting seat 581 and sealing plate 582, limiting seat 581 is fixedly connected on the bottom of screening seat 57, sealing plate 582 is symmetrically slidably connected on the inside of limiting seat 581 through slide rail, the inside of limiting seat 581 is also slidably connected with movable seat 583, the bottom of movable seat 583 is slidably connected with movable block 584, the bottom of limiting seat 581 is rotatably connected with movable block 584, and push rod 585 is rotatably connected between movable seat 583 and movable block 584, limiting seat 581 and connecting seat 34 are interconnected, the bottom of limiting seat 581 is rotatably connected with reciprocating screw rod 586, and screw pair transmission is formed between movable block 584 and reciprocating screw rod 586.

[0038] Connecting seat 34 and hot melt barrel 31 are fixedly connected on the bottom of support sleeve 53, and limiting seat 581 and sealing block 323 are interconnected through fixedly installed connecting pipe 324.

[0039] In practical application, the utility model embodiment is as follows, Figure 2 、 Figure 3 、 Figure 6 And Figure 8As shown, in the raw material pretreatment stage: after the plastic raw material falls from the hopper 51 into the screening seat 57, the stirring mechanism 56 performs shearing, crushing and mixing of the plastic raw material to make the raw material particle size uniform. At the same time, the motor 4 drives the reciprocating screw 586 to rotate. Since the movable block 584 and the reciprocating screw 586 form a spiral pair transmission, the reciprocating screw 586 drives the movable seat 583 through the movable block 584 and the push rod 585 to make axial reciprocating motion in the limiting seat 581. When the movable seat 583 moves upward and squeezes the sealing plate 582, the movable seat 583 forms a seal with the two sealing plates 582, which makes the air in the limiting seat 581 flow rapidly. Through the connecting pipe 324, the sealing block 323 overcomes gravity and moves upward, releasing the sealing state. When the movable seat 583 moves downward, the sealing plate 582 will separate from the movable seat 583 to ensure that the downward movement does not affect the flow of hot air.

[0040] like Figures 2 to 6 As shown, in the waste heat recovery and drying stage: the heat escaping from the hot melt cylinder 31 heats the air between the sleeve 321 and the hot melt cylinder 31, forming a preheated airflow. After the seal is released, the preheated airflow enters the screening seat 57 through the connecting pipe 324 to pre-dry the plastic particles. Particles that meet the particle size requirements fall into the connecting seat 34 through the gap between the support sleeve 53 and the screening seat 57 under the action of the hot airflow, realizing the simultaneous drying and screening.

[0041] like Figure 2 , Figure 4 and Figure 5 As shown, in the hot melt and injection stage: the motor 4 rotates the screw 36 through the feeding mechanism 33 to realize the feeding action of the material, pushing the dry material in the connecting seat 34 into the hot melt cylinder 31. After the material is melted and plasticized in the hot melt cylinder 31, the molten plastic is injected into the mold cavity at a set pressure through the axial pushing action of the feeding mechanism 33. After cooling and solidification, the molded product is obtained.

[0042] like Figure 2 , Figure 4 and Figure 5 As shown, a mounting base 52 is fixedly installed on the outer side of the hopper 51 and the support sleeve 53. The mounting base 52 is fixedly installed on the top of the support base 2. A sealing cover 54 is fixedly installed on the top of the hopper 51. A motor 55 is fixedly installed on the top of the sealing cover 54.

[0043] In actual application, the motor two 55 is fixed on the top of the lower hopper 51 through the sealing cover 54, the output shaft of the motor two 55 drives the stirring mechanism 56 to rotate, after the plastic raw material is loaded into the lower hopper 51 through the feeding opening of the sealing cover 54, the motor two 55 drives the stirring mechanism 56 to apply shearing force to the raw material, so that the crushing and mixing are realized, the mounting seat 52 fixes the lower hopper 51 and the supporting sleeve 53 on the top of the supporting seat 2, so that the installation rigidity of the pretreatment mechanism is ensured, and meanwhile, the sealing cover 54 can prevent the raw material from splashing during the crushing process, and the operation safety and the cleanness of the workshop environment are improved.

[0044] As shown in Figure 2 , Figure 5 , Figure 9 and Figure 10 , the feeding mechanism 33 comprises a limiting sleeve 331 and a transmission shaft 334, the limiting sleeve 331 is slidably connected to the outer side of the transmission shaft 334 through a spline, the limiting sleeve 331 is fixedly connected to the outer side of the hot melt material cylinder 31, the inner side of the limiting sleeve 331 is slidably connected with a movable sleeve 332 and a pushing block 333, the movable sleeve 332 is rotatably connected to the outer side of a limiting rod 336, the movable sleeve 332 and the pushing block 333 are fixedly connected with a spring one 335, the outer side of the transmission shaft 334 is provided with a reciprocating thread, a screw pair transmission is formed between the pushing block 333 and the transmission shaft 334, the transmission shaft 334 and the reciprocating screw rod 586 are drivingly connected through the synchronous belt 35, the outer side of the pushing block 333 is fixedly connected with the limiting rod 336 in a symmetrical manner, the limiting rod 336 penetrates through and is slidably connected to the inner side of the movable sleeve 332, the inner side of the limiting sleeve 331 is provided with a clamping block 337 in a symmetrical manner, the clamping block 337 and the inner wall of the limiting sleeve 331 are fixedly connected with a spring two 338, and the outer side of the limiting rod 336 is fixedly connected with a pushing block 339.

[0045] In actual application, the motor one 4 drives the transmission shaft 334 to rotate, the reciprocating screw rod 586 is synchronously rotated through the synchronous belt 35, so that the synchronization of feeding and drying is realized, the reciprocating thread on the outer side of the transmission shaft 334 and the pushing block 333 form a screw pair transmission, the pushing block 333 is driven to move axially along the limiting sleeve 331, when the pushing block 333 moves towards the hot melt material cylinder 31, the spring one 335 is compressed to store energy, the pushing block 339 moves synchronously with the limiting rod 336 and contacts the clamping block 337, when the clamping block 337 is pushed to overcome the elastic force of the spring two 338, the spring one 335 instantaneously releases the elastic potential energy, drives the movable sleeve 332 to drive the screw rod 36, and forms a pulse pushing force, so that the molten plastic in the hot melt material cylinder 31 is injected into the mold cavity;

[0046] In the process, the limiting sleeve 331 is connected with the transmission shaft 334 through the spline, which ensures that the movable sleeve 332 and the pushing block 333 only move axially and avoid rotating circumferentially, the rotating connection between the movable sleeve 332 and the limiting rod 336 ensures that the compression and release process of the spring 335 is not affected by the rotation of the transmission shaft 334, and the stability of the pushing force is ensured, when the pushing block 333 moves reversely, the clamping block 337 re-implements the position limitation of the movable sleeve 332 under the action of the spring 338, and stores energy for the next injection cycle.

[0047] As shown in Figures 4 to 7 The stirring mechanism 56 includes a driving shaft 561 rotatably connected to the inside of the sealing cover 54, one end of the driving shaft 561 fixedly connected with a stirring rod 562 in the lower hopper 51, the bottom of the driving shaft 561 fixedly connected with a cutter seat one 563, the cutter seat one 563 and the screening seat 57 rotatably connected with a cutter seat two 564, the bottom of the cutter seat one 563 fixedly connected with a driving wheel 565, and the driving wheel 565 engaged with the cutter seat two 564 through a driven wheel 566, and the driven wheel 566 rotatably installed at the bottom of the screening seat 57.

[0048] In actual application, the motor two 55 drives the driving shaft 561 to rotate, drives the stirring rod 562 to preliminarily stir the plastic raw materials in the lower hopper 51, prevents the raw materials from piling up and promotes the flow of the raw materials to the screening seat 57, the cutter seat one 563 at the bottom of the driving shaft 561 rotates synchronously, the driving wheel 565 at the bottom of the cutter seat one 565 drives the cutter seat two 564 to rotate reversely through the driven wheel 566, and a double-shaft differential shearing structure is formed, when the plastic raw materials fall into the shearing area between the cutter seat one 563 and the cutter seat two 564, the shearing force generated by the reversely rotating cutter seat breaks the raw materials into particles with uniform particle size.

[0049] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0050] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A plastic production injection molding processing auxiliary equipment, comprising a device base (1), a support seat (2) is fixedly installed on the top of the device base (1), characterized in that: The inside of the support seat (2) is provided with a hot melting assembly (3) and a drying assembly (5), the outside of the support seat (2) is fixedly installed with a motor one (4), the hot melting assembly (3) comprises a hot melting barrel (31) and a heat recovery mechanism (32), the inside of the hot melting barrel (31) is rotatably connected with a screw rod (36), the hot melting barrel (31) is fixedly installed in the inside of the support seat (2), the drying assembly (5) comprises a lower hopper (51), a supporting sleeve (53) and a screening seat (57), the supporting sleeve (53) is fixedly installed in the inside of the support seat (2), the lower hopper (51) is fixedly installed at the top of the supporting sleeve (53), the screening seat (57) is fixedly connected to the bottom of the lower hopper (51), the inside of the supporting sleeve (53) is provided with a stirring mechanism (56) and a reciprocating mechanism (58); The heat recovery mechanism (32) comprises a sleeve (321) and a sealing seat (322), the sleeve (321) is fixedly installed on the outside of the support seat (2), the sealing seat (322) is fixedly connected to the outside of the sleeve (321), the inside of the sealing seat (322) is slidably connected with a sealing block (323); The reciprocating mechanism (58) comprises a limiting seat (581) and a sealing plate (582), the limiting seat (581) is fixedly connected to the bottom of the screening seat (57), the sealing plate (582) is symmetrically and slidably connected to the inside of the limiting seat (581) through a slide rail, the inside of the limiting seat (581) is also slidably connected with a movable seat (583), the movable seat (583) is in sealing abutment with the two sealing plates (582) and pushes the two sealing plates (582) to move upward; The hot melting assembly (3) further comprises a feeding mechanism (33) and a connecting seat (34), the connecting seat (34) is fixedly connected to the top of one end of the hot melting barrel (31) in the support seat (2) and is internally communicated, the connecting seat (34) and the hot melting barrel (31) are fixedly connected to the bottom of the supporting sleeve (53), the supporting sleeve (53) and the connecting seat (34) are communicated with each other, the limiting seat (581) and the sealing block (323) are communicated with each other through a fixedly installed connecting pipe (324); The feeding mechanism (33) comprises a limiting sleeve (331) and a transmission shaft (334), the limiting sleeve (331) is slidably connected to the outside of the transmission shaft (334) through a spline, the limiting sleeve (331) is fixedly connected to the outside of the hot melting barrel (31), the inside of the limiting sleeve (331) is slidably connected with a movable sleeve (332) and a pushing block (333), the movable sleeve (332) is rotatably connected to the outside of a limiting rod (336), the movable sleeve (332) and the pushing block (333) are fixedly connected with a spring one (335), the outside of the transmission shaft (334) is provided with a reciprocating thread, a screw pair transmission is formed between the pushing block (333) and the transmission shaft (334), the transmission shaft (334) and a reciprocating wire rod (586) are drivingly connected through a synchronous belt (35). The outer side of the push block (333) is symmetrically and fixedly connected with a limiting rod (336), and the limiting rod (336) penetrates and is slidably connected to the inner portion of the movable sleeve (332); The inner portion of the limiting sleeve (331) is symmetrically provided with a clamping block (337), the clamping block (337) and the inner wall of the limiting sleeve (331) are fixedly connected with a spring (338), and the outer side of the limiting rod (336) is fixedly connected with a push block (339).

2. A processing aid for injection molding of plastics according to claim 1, characterized in that: The outer side of the discharging hopper (51) and the supporting sleeve (53) is fixedly installed with a mounting seat (52), the mounting seat (52) is fixedly installed on the top of the supporting seat (2), the top of the discharging hopper (51) is fixedly installed with a sealing cover (54), and the top of the sealing cover (54) is fixedly installed with a motor (55).

3. A processing aid for injection molding of plastics according to claim 2, characterized in that: The bottom of the movable seat (583) is slidably connected with a movable block (584), the bottom of the limiting seat (581) penetrates and is rotatably connected with the movable block (584), the movable seat (583) and the movable block (584) are rotatably connected with a push rod (585), the limiting seat (581) and the connecting seat (34) are in communication with each other, the bottom of the limiting seat (581) is rotatably connected with a reciprocating screw rod (586), and the movable block (584) and the reciprocating screw rod (586) form a screw pair transmission.

4. The injection molding processing aid apparatus for plastic production according to claim 2, characterized by: The stirring mechanism (56) comprises a driving shaft (561) rotatably connected to the inner portion of the sealing cover (54), one end of the driving shaft (561) located in the discharging hopper (51) is fixedly connected with a stirring rod (562), the bottom of the driving shaft (561) is fixedly connected with a cutter seat (563), and the cutter seat (563) and the screening seat (57) are rotatably connected with a cutter seat (564).

5. A processing aid for injection molding of plastics according to claim 4, characterized in that: The bottom of the cutter seat (563) is fixedly connected with a driving wheel (565), the driving wheel (565) is engaged with the cutter seat (564) through a driven wheel (566), and the driven wheel (566) is rotatably installed at the bottom of the screening seat (57).

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