CN115742155A

CN115742155A - Injection molding process for plastic product with composite structure

Info

Publication number: CN115742155A
Application number: CN202211183930.6A
Authority: CN
Inventors: 厉云菊
Original assignee: Zhejiang Guangheng Plastic Technology Co ltd
Current assignee: Zhejiang Guangheng Plastic Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-03-07

Abstract

The invention provides an injection molding process of a plastic product with a composite structure, and relates to the technical field of injection molding production. According to the invention, the heat dissipation of the mold main body is accelerated by matching the air suction pump and the air suction pipe, then the turntable of the mold main body is switched to a material taking process, plastic parts in the mold are taken out, then the mold main body continuously rotates along with the turntable and reaches the preheating bin to be preheated, so that the four steps of plastic molding are separated by combining the four groups of molds distributed on the turntable, the preheating bin and the limiting plate, so that the injection process consisting of the nozzle and the charging barrel is not influenced by other processes of the mold main body, the time utilization rate is improved, and the processing efficiency of batch plastic products is further ensured.

Description

Injection molding process for plastic product with composite structure

Technical Field

The invention belongs to the technical field of injection molding production, and particularly relates to an injection molding process of a plastic product with a composite structure.

Background

Injection molding is a method for producing plastic products, wherein molten plastic is injected into a plastic product mold by pressure and is cooled to form various plastic parts, and injection molding of a plastic product with a composite structure refers to a molding process of injecting two kinds of plastics with different colors into the same mold.

The existing injection molding process of the plastic product with the composite structure comprises the following steps: the injection molding machine is provided with two charging barrels, the structure and the use of each charging barrel are the same as those of a common injection molding charging barrel, each charging barrel is provided with a channel communicated with a nozzle, an opening and closing valve is further arranged in a nozzle passage, after a molten material is well plasticized in the charging barrels during molding, the sequence of the molten material entering the nozzles and the proportion of discharged materials are controlled by the opening and closing valve, then the molten material is injected into a mold cavity of the mold from the nozzle, and after the molten material is cooled, the mold is opened, so that various plastic products with different color mixing effects can be obtained.

In the prior art, the following disadvantages still exist:

in specific production, a group of molds are mostly placed below the nozzle, the single plastic part can be produced only after the molds are closed, molten materials are injected, and the molds are cooled and opened, after the molten materials are injected, the molds occupy the molding equipment, the molding equipment can keep a stop state, the integral molding equipment needs to be cooled and taken out, the subsequent plastic parts are injected, and in the integral molding process, the time utilization rate is poor, so that the production efficiency of the batch of composite structure plastic products is low.

Disclosure of Invention

In order to solve the technical problems, the invention provides an injection molding process for plastic products with composite structures, which aims to solve the problems that the time utilization rate is poor and the production efficiency of batches of plastic products with composite structures is low in the existing integral molding process.

The purpose and the effect of the injection molding process of the plastic product with the composite structure are achieved by the following specific technical means:

the utility model provides a composite construction plastic products injection moulding technology, the preparation facilities that composite construction plastic products injection moulding technology adopted is including base, feed cylinder, supporting seat, connecting seat and nozzle, and fixed mounting has spring two between backup pad bottom and the base, the feed cylinder is linked together through transmission pipe and nozzle, the outer table wall fixed mounting of base has the fixing base, and there is the footstock at fixing base top through lower fixed mounting, and the footstock rotates through the bearing and is connected with the carousel, and carousel top fixed mounting has four group's mould main parts, still including:

the disassembling mechanism comprises a servo motor, a rotating shaft, a limiting plate, a convex column, a linkage assembly and a driving assembly, wherein the linkage assembly is arranged between the convex column and the rotating shaft and used for linking a supporting seat and a rotating disc, the driving assembly is arranged between the rotating shaft and the rotating disc and used for rotating the rotating disc, the servo motor is fixedly arranged at the top of a fixed seat, the outer surface wall of the rotating shaft is in sliding connection with the inner surface wall of a top seat, the limiting plate is positioned above the rotating disc, a limiting strip is fixedly arranged on the outer side of the limiting plate, an air suction pump is fixedly arranged at the top of the limiting plate, and the input end of the air suction pump is communicated with an air suction pipe;

the preheating mechanism comprises a preheating bin and a conducting assembly which is arranged between the limiting plate and the preheating bin and is used for transferring hot air flow, and the preheating bin is positioned above the turntable and is fixedly connected with the fixed seat;

the injection molding process of the plastic product with the composite structure comprises the following steps:

s1, injecting, wherein a mold main body is transferred to the lower part of a nozzle from a preheating bin, a linkage assembly drives a charging barrel and the nozzle to move downwards through a supporting seat, the nozzle is in butt joint with the mold main body, and a molten material enters the mold main body;

s2, cooling, wherein the die main body is transferred to the position below the limiting plate, and the input end of the air suction pump accelerates the air flow exchange outside the die main body through an air suction pipe;

s3, taking materials, separating the die main body from the limiting plate, opening the die main body, and taking out the formed plastic part;

s4, preheating, namely allowing the mold main body after material taking to enter a preheating bin, conducting hot air flow into the mold main body by the conducting assembly, and repeating the steps S1-S3 to complete injection molding of batches of plastic parts.

Further, the mould main part is including last mould and lower mould, lower mould top fixed mounting have with last mould interior table wall sliding connection's interior pole, the interior pole outside is provided with spring one, a spring vertical end both sides respectively with last mould interior table wall and lower mould top fixed connection.

Further, the linkage subassembly is including the outrigger, four groups outrigger fixed mounting is shown the wall outside the pivot, and the vertical end bottom of four groups of outriggers all rotates and is connected with the gyro wheel, table wall fixed mounting has the polished rod in the footstock, projection outward appearance wall fixed mounting has the cooperation strip, be provided with the sliding part between polished rod and the projection, and when the gyro wheel was located cooperation strip top, spring two was in complete compression state.

Further, drive assembly is including the dwang of movable mounting at the fixing base top, the dwang passes through the drive belt and is connected with the pivot transmission, dwang top fixed mounting has the drive wheel, carousel bottom fixed mounting has the overcoat, and table wall and lower seat outward appearance wall sliding connection in the overcoat, just the drive wheel is connected with the meshing of overcoat outward appearance wall.

Further, the limiting plate bottom is the fretwork setting, just the limit strip is kept away from one side of limiting plate and is set the slope to, table wall fixed mounting has the distribution pipe that switches on with the aspirator pump input end in the limiting plate, the distribution pipe switches on with two sets of breathing pipes mutually.

Furthermore, the limiting plate and the outer surface wall of the preheating bin are fixedly provided with vertical rods, and the vertical rods are fixedly connected with the top of the fixing seat through screws.

Furthermore, the conduction assembly comprises an air outlet pipe fixedly installed on the inner surface wall of the preheating bin, the output end of the air suction pump is fixedly provided with an air guide pipe, the air guide pipe is communicated with the air outlet pipe, the outer surface wall of the air guide pipe is wrapped with a heat insulation sleeve, and the heat insulation sleeve is made of phenolic foam plastics.

Furthermore, a plurality of groups of lugs distributed annularly are fixedly mounted at the bottom of the rotary table, and the bottoms of the lugs and the top of the base are located on the same horizontal plane.

Furthermore, the lower seat is fixedly connected with the top of the fixed seat through two groups of connecting sheets which are longitudinally distributed, and the servo motor is positioned between the two groups of connecting sheets.

Furthermore, the sliding part comprises a sliding sleeve, the inner surface wall of the sliding sleeve is in sliding connection with the outer surface wall of the polished rod, one side of the sliding sleeve is fixedly connected with a matching strip, and the sliding sleeve and the top of the convex column are located on the same horizontal plane.

Compared with the prior art, the invention has the following beneficial effects:

1. in the invention, four groups of mould main bodies are fixed on a turntable, and one group positioned in a preheating bin is taken as a starting point, the four groups of mould main bodies are distributed anticlockwise and correspond to four groups of processes of preheating, injecting, cooling and material taking, a servo motor output end drives a driving shaft to rotate, the driving shaft is linked with an outer sleeve to drive the turntable to rotate for 90 degrees, in the process, a linkage assembly drives a supporting seat and a nozzle to move downwards through a convex column, molten materials in a charging barrel enter the mould main body through the nozzle and then enter the bottom of a limiting plate, the heat dissipation of the mould main body is accelerated through the matching of an air suction pump and an air suction pipe, then the turntable of the mould main body is switched to the material taking process, plastic parts in the mould are taken out, then the mould main body continuously rotates along with the turntable and reaches the preheating bin to be preheated, so as to-and four groups of moulds distributed on the turntable and the combination of the preheating bin and the limiting plate are used for separating the four steps of plastic forming, so that the injection process consisting of the nozzle and the charging barrel is not influenced by other processes of the mould main body, the time utilization rate is improved, and the processing efficiency of batch plastic products is further ensured.

2. According to the invention, the two groups of mould main bodies positioned in the front of the preheating process are heated through the external heating assembly in the initial stage, after the third group of mould main bodies enter the preheating process, the preorder mould main bodies are injected and enter the bottom of the limiting plate, the air pump input end can accelerate the air flow exchange positioned at the outer side of the bottom of the limiting plate through the distribution pipe and the air suction pipe so as to improve the heat dissipation efficiency of the mould main bodies, and the hot air flow can be transferred to the air outlet pipe through the air guide pipe, at the moment, because the mould main bodies are in an open state, the air guide pipe can uniformly conduct the hot air flow into the mould main bodies, so that the uniform preheating of the mould main bodies is realized, the heat dissipation effect of the mould main bodies at the bottom of the limiting plate can be ensured, and meanwhile, the flowability of the molten material entering the mould main bodies is ensured, and the direct condensation of the precooling is avoided.

3. In the process of driving the rotating shaft to rotate by the servo motor, the rotating shaft can drive the driving wheel to rotate through the matching of the driving belt and the rotating rod, the driving wheel drives the outer sleeve and the rotary table to rotate through the meshing with the outer surface wall of the arc end of the outer sleeve, meanwhile, the outer frame of the outer surface wall of the rotating shaft and the roller wheel synchronously rotate, the roller wheel can press the inclined surface of the matching strip to slide and press the matching strip downwards until the roller wheel is positioned at the top of the matching strip, the matching strip can drive the supporting seat to move downwards through the convex column, then the roller wheel slides along the inclined surface of the other side of the matching strip until the roller wheel is separated from the matching strip, the matching strip and the supporting seat can reset under the action of the second spring to reciprocate, so that the supporting seat can drive the charging barrel and the nozzle to finish the upward movement and the downward movement in the whole process of switching the die body positioned on the lower side of the matching strip, the movement of the rotary table and the nozzle is realized through the group of the servo motor, the equipment cost is effectively saved, and the stable matching of the die body and the nozzle is ensured.

Drawings

FIG. 1 is a schematic view of a first perspective of a molding apparatus of the present invention.

FIG. 2 is a schematic view of a second spring and a supporting base of the present invention.

FIG. 3 is a schematic view of the structure of the outer frame and the roller of the present invention.

Fig. 4 is a schematic view of the structure of the gear and the rotating rod in the invention.

FIG. 5 is a schematic view of the structure of the spindle and the housing of the present invention.

Fig. 6 is a schematic view of the structure of the mating strip and the polish rod of the present invention.

Fig. 7 is a schematic diagram of a limiting plate structure in the invention.

Fig. 8 is a schematic view of the overall structure of the mold of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a base; 2. a charging barrel; 3. a supporting seat; 4. a conveying pipe; 5. a connecting seat; 6. a mold body; 601. an upper die; 602. a lower die; 603. an inner rod; 604. a first spring; 7. a turntable; 8. a fixed seat; 9. erecting a rod; 10. a limiting plate; 11. preheating a bin; 12. a second spring; 13. a nozzle; 14. a convex column; 15. a getter pump; 16. a limiting strip; 17. an air duct; 18. a top seat; 19. a rotating shaft; 20. an outer frame; 21. a roller; 22. a mating strip; 23. a bump; 24. rotating the rod; 25. a drive wheel; 26. a jacket; 27. a servo motor; 28. a lower seat; 29. a sliding sleeve; 30. a polish rod; 31. a distribution pipe; 32. an air intake duct; 33. an air outlet pipe; 33. and a bearing.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Example (b):

as shown in figures 1 to 8: a kind of plastic products injection molding process of composite structure, the preparation facilities that the plastic products injection molding process of composite structure adopts include the base 1, the feed cylinder 2, the supporting seat 3, connecting seat 5 and spray nozzle 13, the fixed mounting has second spring 12 between base 1 and the bottom of supporting seat 3, the feed cylinder 2 is communicated with spray nozzle 13 through the transmission pipe 4, the exterior wall of base 1 is fitted with the permanent seat 8 fixedly, the top of the permanent seat 8 is fitted with the footstock 18 fixedly through the lower seat 28, the footstock 18 rotates and connects with the rotary table 7 through the bearing 34, the top of the rotary table 7 is fitted with the four groups of mould bodies 6 fixedly, fix four groups of mould bodies 6 on the rotary table 7, and regard one group located in preheating the storehouse 11 as the starting point, four groups of mould bodies 6 distribute counterclockwise and correspond to preheat, pour into, cool and get four groups of processes of material;

it should be noted that: the working mechanism of the charging barrel 2, the connecting seat 5 and the nozzle 13 in the prior art is adopted, namely after the molten material is well plasticized in the charging barrel 2, the sequence of the molten material entering the nozzle 13 and the proportion of discharged material are controlled by an opening and closing valve, and then the molten material is injected into a die cavity of the die body 6 from the nozzle 13;

also includes: the disassembly mechanism comprises a servo motor 27, a rotating shaft 19, a limiting plate 10, a convex column 14, a linkage assembly arranged between the convex column 14 and the rotating shaft 19 and used for linkage of the supporting seat 3 and the rotating disc 7, and a driving assembly arranged between the rotating shaft 19 and the rotating disc 7 and used for rotation of the rotating disc 7, wherein the servo motor 27 is fixedly arranged at the top of the fixed seat 8, the outer surface wall of the rotating shaft 19 is connected with the inner surface wall of the top seat 18 in a sliding manner, the limiting plate 10 is positioned above the rotating disc 7, a limiting strip 16 is fixedly arranged on the outer side of the limiting plate 10, an air suction pump 15 is fixedly arranged at the top of the limiting plate 10, and the input end of the air suction pump 15 is communicated with an air suction pipe 32;

the preheating mechanism comprises a preheating bin 11 and a conduction assembly which is arranged between the limiting plate 10 and the preheating bin 11 and used for hot air flow transfer, and the preheating bin 11 is positioned above the rotary table 7 and fixedly connected with the fixed seat 8;

the output end of the servo motor 27 drives the rotating shaft 19 to rotate, the rotating shaft 19 is linked with the outer sleeve 26 to drive the turntable 7 to rotate by 90 degrees, in the process, the linkage assembly can drive the supporting seat 3 and the nozzle 13 to move downwards through the convex column 14, after the molten material in the charging barrel 2 enters the die main body 6 through the nozzle 13, the die main body 6 is restrained by the limiting strips 16 and the limiting plates 10 to keep a closed state, the heat dissipation of the die main body 6 is accelerated through the matching of the air suction pump 15 and the air guide pipe 17, then the die main body 6 is switched to a material taking process along with the turntable 7, the die main body 6 loses the restraint of the limiting plates 10 and is separated under the action of a spring I604, and because the die is cooled, plastic parts in the die main body 6 can be conveniently taken out, then the die main body 6 continuously rotates along with the turntable 7 and reaches the preheating bin 11, the air suction pump 15 is matched with the air guide pipe 17 to transfer heat into the die main body 6 in the preheating bin 11 while accelerating the cooling of the subsequent die main body 6, and the four steps of plastic molding are separated through the four groups of die main bodies 6 distributed on the turntable 7 and the combination of the preheating bin 11 and the limiting plate 10, so that the injection process consisting of the nozzle 13 and the charging barrel 2 is not influenced by other processes of the die main body 6, the time utilization rate is improved, and the processing efficiency of batch plastic products is further ensured;

s1, injecting, wherein the mold main body 6 is transferred to the position below a nozzle 13 from a preheating bin 11, a linkage assembly drives a charging barrel 2 and the nozzle 13 to move downwards through a supporting seat 3, the nozzle 13 is in butt joint with the mold main body 6, and molten materials enter the mold main body 6;

s2, cooling, wherein the die main body 6 is transferred to the position below the limiting plate 10, and the input end of the air suction pump 15 accelerates the air flow exchange outside the die main body 6 through the air suction pipe 32;

s3, taking materials, separating the die main body 6 from the limiting plate 10, opening the die main body, and taking out the formed plastic part;

s4, preheating, namely enabling the mold main body 6 after material taking to enter a preheating bin 11, conducting hot air flow to the interior of the mold main body 6 by a conducting assembly, and repeating the steps S1-S3 to complete injection molding of batches of plastic parts.

The die body 6 comprises an upper die 601 and a lower die 602, an inner rod 603 connected with the inner surface wall of the upper die 601 in a sliding manner is fixedly mounted at the top of the lower die 602, a first spring 604 is arranged outside the inner rod 603, two sides of the vertical end of the first spring 604 are respectively connected with the inner surface wall of the upper die 601 and the top of the lower die 602, when the upper die 601 is constrained, the upper die 601 and the lower die 602 can be tightly combined, and when the constraint is lost, the first spring 604 can push the upper die 601 and the lower die 602 to be separated.

The linkage assembly comprises an outer frame 20, four groups of outer frames 20 are fixedly mounted on the outer surface wall of a rotating shaft 19, the bottoms of the vertical ends of the four groups of outer frames 20 are rotatably connected with rollers 21, a polished rod 30 is fixedly mounted on the inner surface wall of a top seat 18, a matching strip 22 is fixedly mounted on the outer surface wall of a convex column 14, a sliding part is arranged between the polished rod 30 and the convex column 14, when the rollers 21 are located at the top of the matching strip 22, a second spring 12 is in a completely compressed state, the rollers 21 move along the inclined surface of the matching strip 22 and gradually press the matching strip 22 until the matching strip 22 is completely located at the top of the matching strip 22, at the moment, a support seat 3 is pressed on a mold main body 6, a nozzle 13 is in butt joint with the mold main body 6, a part of the mold main body 6 is inserted into a limiting strip 16, then the rollers 21 move along the inclined surface of the other side of the matching strip 22 until the matching strip 22 is separated from the matching strip 22, and the second spring 12 pushes the support seat 3 to reset with the matching strip 22.

Wherein, drive assembly is including movable mounting in the dwang 24 at 8 tops of fixing base, dwang 24 passes through the drive belt and is connected with the 19 transmissions of pivot, dwang 24 top fixed mounting has

drive wheel

25, 7 bottom fixed mounting on carousel have overcoat 26, table wall and 28 exterior wall sliding connection of lower seat in the overcoat 26, and drive

wheel

25 and 26 exterior wall meshing of overcoat are connected, pivot 19 drives dwang 24 and rotates, dwang 24 rethread drive wheel 25 linkage overcoat 26 and carousel 7.

Wherein, limiting plate 10 bottom is the fretwork setting, and the one side that limiting plate 10 was kept away from to spacing 16 sets to the slope, and table wall fixed mounting has the distribution pipe 31 that switches on with 15 input ends of aspirator pump in the limiting plate 10, and distribution pipe 31 switches on with two sets of breathing pipes 32 mutually, and the quick heat dissipation of mould main part 6 can be guaranteed in the fretwork design.

Wherein, the equal fixed mounting in limiting

plate

10 and 11 outer surface walls in storehouse of preheating has pole setting 9, and two sets of pole settings 9 are all through screw and 8 top fixed connection of fixing base to limiting

plate

10 and 11 dismouting in storehouse of preheating are convenient for.

Wherein, the conduction subassembly is including the outlet duct 33 of fixed mounting table wall in preheating

bin

11, 15 output end fixed mounting of aspirator pump have air duct 17, and air duct 17 switches on mutually with outlet duct 33, and air duct 17 outer table wall is wrapped up in and is equipped with the insulation cover, the insulation cover adopts phenolic foam to make, and phenolic foam possesses better adiabatic heat-proof quality, can effectually keep warm to the gas of the inside conduction of air duct 17, and the hot gas flow shifts to outlet duct 33 through air duct 17, shifts to in mould main part 6.

Wherein, the fixed mounting in carousel 7 bottom has the multiunit to be the lug 23 that the annular distributes, and lug 23 bottom and base 1 top are located same horizontal plane for fill the clearance at carousel 7 and base 1 top under the prerequisite of injecing frictional force, guarantee carousel 7 pivoted stability.

Wherein, lower seat 28 is through two sets of longitudinally distributed's connection piece and the fixed base 8 top fixed connection, and servo motor 27 is located between two sets of connection pieces, has both guaranteed servo motor 27 and carousel 7's position stability, can make pivot 19 can be stable again drive dwang 24 through the conveyer belt rotate.

Wherein, the sliding part is including sliding sleeve 29, and sliding sleeve 29 interior table wall and polished rod 30 exterior wall sliding connection, and sliding sleeve 29 one side and cooperation strip 22 fixed connection, sliding sleeve 29 and projection 14 top are located same horizontal plane to guaranteed that cooperation strip 22 can be steady carry out vertical migration.

The specific use mode and function of the embodiment are as follows:

four groups of mould bodies 6 are fixed on a turntable 7, and a group positioned in a preheating bin 11 is taken as a starting point, the four groups of mould bodies 6 are distributed anticlockwise and correspond to four groups of procedures of preheating, injecting, cooling and material taking, an output end of a servo motor 27 drives a rotating shaft 19 to rotate, the rotating shaft 19 is linked with an outer sleeve 26 to drive the turntable 7 to rotate for 90 degrees, in the process, a linkage assembly drives a supporting seat 3 and a nozzle 13 to move downwards through a convex column 14, after molten material in a charging barrel 2 enters the mould bodies 6 through the nozzle 13, the mould bodies 6 are restrained by a limiting strip 16 and a limiting plate 10 to keep a closed state, the heat dissipation of the mould bodies 6 is accelerated through the matching of an air suction pump 15 and an air guide pipe 17, then the mould bodies 6 are switched to the material taking procedure along with the turntable 7, the mould bodies 6 lose the restraint of the limiting plate 10 and are separated under the action of a spring I604, and the mould is cooled, the plastic parts in the mold main body 6 can be conveniently taken out, then the mold main body 6 continuously rotates along with the rotary table 7 and reaches the preheating bin 11, the air suction pump 15 and the air guide pipe 17 are matched to transfer heat into the mold main body 6 in the preheating bin 11 while accelerating the cooling of the subsequent mold main body 6, so that the reciprocating motion is realized, four steps of plastic molding are separated through the four groups of mold main bodies 6 distributed on the rotary table 7 and the combination of the preheating bin 11 and the limiting plate 10, the injection process consisting of the nozzle 13 and the charging barrel 2 is not influenced by other processes of the mold main body 6, the time utilization rate is improved, the processing efficiency of batches of plastic products is further ensured, the mold main bodies 6 in the front two groups of the preheating bin 11 can be heated through an external heating assembly in the initial stage, after the mold main body 6 in the third group enters the preheating bin 11, the mold main body 6 in the preamble is injected and enters the bottom of the limiting plate 10, the input end of the air suction pump 15 accelerates the exchange of air flow at the outer side of the bottom of the limiting plate 10 through the distribution pipe 31 and the air suction pipe 32 to improve the heat dissipation efficiency, and the hot air flow is transferred to the air outlet pipe 33 through the air guide pipe 17, at this time, because the mold main body 6 is in an open state, the air outlet pipe 33 can uniformly conduct the hot air flow to the interior of the mold main body 6 to realize uniform preheating of the mold main body 6, thereby ensuring the heat dissipation effect of the mold main body 6 at the bottom of the limiting plate 10 and preheating the mold main body 6 through the conduction of the hot air flow, ensuring the fluidity of the melt entering the interior of the mold main body 6 to avoid direct precooling and condensation, in the process that the servo motor 27 drives the rotating shaft 19 to rotate, the rotating shaft 19 can drive the driving wheel 25 to rotate through the cooperation of the driving belt and the rotating rod 24, the driving wheel 25 drives the outer sleeve 26 and the rotary disc 7 to rotate through the meshing with the outer surface wall of the arc-shaped end of the outer sleeve 26, meanwhile, the outer frame 20 of the outer surface wall of the rotating shaft 19 and the roller 21 synchronously rotate, the roller 21 slides along the inclined surface of the matching strip 22 and presses the matching strip 22 downwards until the roller 21 is positioned at the top of the matching strip 22, the matching strip 22 drives the supporting seat 3 to move downwards through the convex column 14, then the roller 21 slides along the inclined surface of the other side of the matching strip 22 until the roller is separated from the matching strip 22, the matching strip 22 and the supporting seat 3 reset under the action of the spring II 12 to reciprocate, so that the supporting seat 3 drives the charging barrel 2 and the nozzle 13 to finish the upward movement and the downward movement in the whole process of switching of the die main body 6 positioned at the lower side of the matching strip 22, the movement of the rotary disc 7 and the nozzle 13 is realized through the group of the servo motor 27, and the equipment cost is effectively saved, while ensuring a stable fit of the mould body 6 with the nozzle 13.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. An injection molding process of a plastic product with a composite structure is characterized in that: preparation facilities that composite construction plastic products injection moulding technology adopted is including base (1), feed cylinder (2), supporting seat (3), connecting seat (5) and nozzle (13), and fixed mounting has spring two (12) between backup pad (3) bottom and base (1), feed cylinder (2) are linked together through transmission pipe (4) and nozzle (13), base (1) outward appearance wall fixed mounting has fixing base (8), and fixing base (8) top has footstock (18) through lower seat (28) fixed mounting, and footstock (18) rotate through bearing (34) and are connected with carousel (7), and carousel (7) top fixed mounting has four group's mould main parts (6), still including:

the disassembly mechanism comprises a servo motor (27), a rotating shaft (19), a limiting plate (10), a convex column (14), a linkage assembly and a driving assembly, wherein the linkage assembly is arranged between the convex column (14) and the rotating shaft (19) and used for linking a supporting seat (3) and a turntable (7), the driving assembly is arranged between the rotating shaft (19) and the turntable (7) and used for rotating the turntable (7), the servo motor (27) is fixedly arranged at the top of a fixed seat (8), the outer surface wall of the rotating shaft (19) is in sliding connection with the inner surface wall of a top seat (18), the limiting plate (10) is positioned above the turntable (7), a limiting strip (16) is fixedly arranged at the outer side of the limiting plate (10), an air suction pump (15) is fixedly arranged at the top of the limiting plate (10), and the input end of the air suction pump (15) is communicated with an air suction pipe (32);

the preheating mechanism comprises a preheating bin (11) and a conduction assembly which is arranged between the limiting plate (10) and the preheating bin (11) and used for hot air flow transfer, and the preheating bin (11) is positioned above the rotary table (7) and is fixedly connected with the fixed seat (8);

s1, injecting, wherein a mold main body (6) is transferred to the lower part of a nozzle (13) from a preheating bin (11), a linkage assembly drives a charging barrel (2) and the nozzle (13) to move downwards through a supporting seat (3), the nozzle (13) is in butt joint with the mold main body (6), and molten materials enter the mold main body (6);

s2, cooling, wherein the die main body (6) is transferred to the position below the limiting plate (10), and the input end of the air suction pump (15) accelerates the air flow exchange at the outer side of the die main body (6) through an air suction pipe (32);

s3, taking materials, separating the die main body (6) from the limiting plate (10), opening the die main body, and taking out the formed plastic part;

s4, preheating, wherein the mold main body (6) after material taking enters a preheating bin (11), the conduction assembly conducts hot air flow into the mold main body (6), and then the steps of S1-S3 are repeated to complete injection molding of the batch of plastic parts.

2. A composite structural plastic article injection molding process as claimed in claim 1, wherein: mould main part (6) including last mould (601) and lower mould (602), lower mould (602) top fixed mounting have with last mould (601) interior table wall sliding connection's interior pole (603), interior pole (603) outside is provided with spring (604), spring (604) vertical end both sides respectively with last mould (601) interior table wall and lower mould (602) top fixed connection.

3. A composite structural plastic article injection molding process as claimed in claim 1, wherein: linkage subassembly is including outrigger (20), four groups outrigger (20) fixed mounting is at pivot (19) exterior wall, and four groups outrigger (20) vertical end bottoms all rotate and be connected with gyro wheel (21), table wall fixed mounting has polished rod (30) in footstock (18), projection (14) exterior wall fixed mounting has cooperation strip (22), be provided with the sliding part between polished rod (30) and projection (14), and when gyro wheel (21) is located cooperation strip (22) top, spring two (12) are in complete compression state.

4. A composite structural plastic article injection molding process as claimed in claim 1, wherein: drive assembly is including dwang (24) of movable mounting at fixing base (8) top, dwang (24) are connected with pivot (19) transmission through the drive belt, dwang (24) top fixed mounting has drive wheel (25), carousel (7) bottom fixed mounting has overcoat (26), and table wall and lower seat (28) outward appearance wall sliding connection in overcoat (26), just drive wheel (25) are connected with the meshing of overcoat (26) outward appearance wall.

5. A composite structural plastic article injection molding process as claimed in claim 1, wherein: limiting plate (10) bottom is the fretwork setting, just one side that limiting plate (10) were kept away from in spacing strip (16) sets to the slope, table wall fixed mounting has distribution pipe (31) that switch on with aspirator pump (15) input end in limiting plate (10), distribution pipe (31) switch on mutually with two sets of breathing pipes (32).

6. A composite structural plastic article injection molding process as claimed in claim 1, wherein: limiting plate (10) and preheating storehouse (11) outer surface wall equal fixed mounting have pole setting (9), and are two sets of pole setting (9) are all through screw and fixing base (8) top fixed connection.

7. A composite structural plastic article injection molding process as claimed in claim 1, wherein: the conduction assembly comprises an air outlet pipe (33) fixedly installed on the inner surface wall of the preheating bin (11), an air guide pipe (17) is fixedly installed at the output end of the air suction pump (15), the air guide pipe (17) is communicated with the air outlet pipe (33), the outer surface wall of the air guide pipe (17) is wrapped with a heat insulation sleeve, and the heat insulation sleeve is made of phenolic foam plastic.

8. A composite structural plastic article injection molding process as claimed in claim 1, wherein: the bottom of the rotary table (7) is fixedly provided with a plurality of groups of lugs (23) which are distributed annularly, and the bottoms of the lugs (23) and the top of the base (1) are positioned on the same horizontal plane.

9. A composite structural plastic article injection molding process as claimed in claim 1, wherein: the lower seat (28) is fixedly connected with the top of the fixed seat (8) through two groups of connecting sheets which are longitudinally distributed, and the servo motor (27) is positioned between the two groups of connecting sheets.

10. A composite structural plastic article injection molding process as claimed in claim 3, wherein: the sliding part comprises a sliding sleeve (29), the inner surface wall of the sliding sleeve (29) is in sliding connection with the outer surface wall of the polished rod (30), one side of the sliding sleeve (29) is fixedly connected with the matching strip (22), and the sliding sleeve (29) and the top of the convex column (14) are located on the same horizontal plane.