CN113370456B

CN113370456B - Semi-automatic plastic extrusion mechanism for cup cover forming

Info

Publication number: CN113370456B
Application number: CN202110934587.3A
Authority: CN
Inventors: 廖清
Original assignee: Foshan Shunde Zhineng Precision Mould Co ltd
Current assignee: Foshan Shunde Zhineng Precision Mould Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2021-11-09
Anticipated expiration: 2041-08-16
Also published as: CN113370456A

Abstract

The invention belongs to the technical field of injection molding of plastic cup covers, and particularly relates to a semi-automatic plastic extrusion mechanism for cup cover molding, which comprises a cup cover injection mold, an injection molding table and a feeding structure; the feeder is matched with the outer shell, so that integration of three functions of plastic stirring, plastic conveying, uniform mixing and the like can be realized, and the structure of the equipment is effectively simplified; meanwhile, the separation of stirring and conveying functions can be realized by the mutually independent structure of the upper and lower packing augers of the feeder and the mutually unidirectional transmission mode, and the stirring operation can be independently executed; the auxiliary stirrer can increase the speed of uniformly stirring the plastic in the stirring cavity, simplify the structure of the plastic extruding mechanism and realize structural integration; different temperature control modes are respectively arranged in the side walls of the mixing cavity, the conveying cavity and the stirring cavity, so that plastics can be melted to different degrees according to the functions of stirring, conveying, mixing and the like, and energy conservation and smooth production are realized.

Description

Semi-automatic plastic extrusion mechanism for cup cover forming

Technical Field

The invention belongs to the technical field of injection molding of plastic cup covers, and particularly relates to a semi-automatic plastic extrusion mechanism for forming a cup cover.

Background

Injection molding, also known as injection molding, is a molding method that is similar in operation to an injection syringe and that is a method of injection and molding, in which a completely molten plastic material is stirred by a screw, injected into a mold cavity under high pressure, and cooled and solidified to obtain a molded article. The method has the advantages of high production speed, high efficiency, automation of operation, various designs and colors, various shapes from simple to complex, small sizes, accurate product size, easy product replacement, capability of finishing the manufacture of components with complex shapes, suitability for the molding processing fields of mass production, products with complex shapes and the like, suitability for batch production of components with complex shapes and the like, and important processing method. The prior injection molding machine is usually provided with a heater outside the cylinder for heating the plastic granules in the cylinder to melt the plastic granules into a molten state, and then the plastic granules in the molten state are injected into the closed mold cavity by the thrust of the screw. .

In addition, with the improvement of living standard of people, people have higher and higher requirements on water bottles or water cups for drinking water, the water cups and the water bottles with different shapes are often matched with cup covers with different shapes, the integral body of the existing injection molding machine is large, the purchase cost is high, and if the existing injection molding machine is used for small-scale production, the problems that the heat utilization rate of the existing heater is not high, the low-cost control cannot be realized and the like are often caused easily, so that the design of injection molding equipment with high integration level and small volume, which is suitable for small-scale production and processing, becomes a problem to be solved.

Disclosure of Invention

In order to solve the problem that the injection molding machine in the prior art is not high in integration level and cannot be suitable for small-scale production and processing of the cup cover, the scheme provides a semi-automatic plastic extrusion mechanism for forming the cup cover.

The technical scheme adopted by the invention is as follows:

a semi-automatic plastic extrusion mechanism for cup cover molding comprises a cup cover injection mold, an injection molding table and a feeding structure; the feeding structure comprises an outer shell and a feeder, wherein the outer shell is sequentially provided with a blending cavity, a conveying cavity and a stirring cavity from top to bottom; the feeder is vertically arranged in the outer shell, and comprises a conical head part, an upper packing auger and a lower packing auger which are sequentially arranged from top to bottom and are coaxial, the conical head part is conical or frustum-shaped and is arranged in the mixing cavity, the upper packing auger is arranged in the conveying cavity and is used for conveying molten plastics, and the lower packing auger is arranged in the stirring cavity and has a helicity smaller than that of the upper packing auger; the inner diameter of the stirring cavity is larger than the outer diameter of the lower auger, so that the plastic can roll outwards in the radial direction; the injection molding machine is characterized in that a frustum-shaped plastic outlet is formed in the table top of the injection molding table, a mold cavity is formed in the cup cover injection mold, an injection molding port communicated with the mold cavity is formed in the bottom of the cup cover injection mold, and when the injection molding port is in butt joint with the plastic outlet, plastic in a melting state in the blending cavity can be injected into the mold cavity. The feeding structure is of a boss type structure, the cone head, the upper packing auger and the lower packing auger are coaxial, the cone head, the upper packing auger and the lower packing auger can be matched with three cavities of the mixing cavity, the conveying cavity and the stirring cavity to achieve functions of mixing, pressurizing, stirring and the like respectively, the helicity of the lower packing auger is smaller than that of the upper packing auger, the conveying efficiency of the lower packing auger is larger than that of the upper packing auger, and redundant molten plastic at the lower packing auger rolls to the radial outer side of the lower packing auger to achieve stirring. In addition, because the auger plays vertical transport effect and stirring effect simultaneously down, can be so that stirring and transport function's integration, and the conical head is connected in the upper end of last auger, can realize plastics transport speed control through the control of interval between conical head and the mixing chamber, through the syllogic structural design of feeder, effectual will stir, carry and the mixing function is integrated in an organic whole, realize the simplification of structure and improve integrated degree.

As an alternative or complementary design to the above structure: the lower part of the upper packing auger is fixedly connected with a central rod, the lower part of the lower packing auger is fixedly connected with a feeding gear, and the lower end of the central rod penetrates through the center of the lower packing auger and is in one-way transmission fit with the feeding gear. Well core rod can be for auger unidirectional rotation down, through well core rod's structure, make the rotation of going up auger and auger down can mutual independence, when auger antiport is down, can realize stirring function and transport function's separation, make the stirring operation can accomplish alone, when plastics are just beginning to add and not complete melting, go up the auger and can not carry plastics, avoid not melting plastics taking place to block up when carrying the mixing intracavity.

As an alternative or complementary design to the above structure: the inner side of the feeding gear is provided with a ratchet, the central rod is rotatably connected with a pawl, and the feeding gear drives the upper auger to rotate through the pawl when rotating in the forward direction. The ratchet structure is adopted as a one-way transmission control mode, the structure can be effectively simplified, the integration level of the equipment is improved, the internal space of the equipment is fully utilized, and the control of single-line transmission is realized.

As an alternative or complementary design to the above structure: the feeding structure is provided with an auxiliary stirrer which comprises a stirring motor, a stirring screw rod and a stirring gear, the stirring screw rod is vertically arranged in the stirring cavity, the stirring motor is fixed on the outer shell, the rotating shaft of the stirring motor is connected with the upper end of the stirring screw rod, and the stirring gear is connected with the lower end of the stirring screw rod and meshed with the feeding gear. Supplementary agitator can assist and accomplish the stirring operation with lower auger, the screw thread direction of stirring screw rod is the same with the screw thread direction of auger down, and stirring gear and pay-off gear intermeshing, make stirring screw rod and auger rotate with opposite direction all the time down, both carry the opposite direction of plastics, realize the rapid mixing of plastics in can less space, in addition, the feeder can be driven by agitator motor, need not alone for auger configuration driving motor down, further optimize the space, improve equipment's integrated level.

As an alternative or complementary design to the above structure: a plurality of stirring screws taking the lower auger as the center are arranged around the lower auger, and each stirring screw is driven by a stirring motor; all the stirring motors can rotate forward or backward synchronously. Generally, four stirring screws are arranged at the periphery of the lower auger and distributed in an annular shape, the whole stirring cavity is in a quadrilateral shape, the four stirring screws are respectively positioned at four corners, and vertical plates can be arranged between the adjacent stirring screws, so that the molten plastic can be conveniently drained to the lower auger in the rotating process of the stirring screws, and the stirring uniformity is improved.

As an alternative or complementary design to the above structure: and a heating medium cavity is arranged in the side wall of the stirring cavity, and the heating medium cavity heats and melts the plastic in the stirring cavity when conveying a liquid or gaseous high-temperature medium. Utilize heating medium to heat the stirring chamber, can unify the heat supply when many plastics extrusion mechanism use simultaneously, realize thermal unified transport and utilization, be applicable to energy-conserving accuse temperature in the batch production course of working.

As an alternative or complementary design to the above structure: and a heat-insulating medium cavity is arranged in the side wall of the conveying cavity and is used for conveying a liquid medium or a gaseous medium which enables the plastic to be kept in a molten state. The heat preservation medium cavity also utilizes liquid or gaseous medium to realize unified management and control of heat, and the heat preservation medium cavity can utilize the waste heat of the medium flowing out of the heating medium cavity to preserve heat, thereby realizing the full utilization of heat.

As an alternative or complementary design to the above structure: the upper portion of shell body constitutes the pay-off head, and the mixing chamber is located the pay-off head, has embedded electric heater in the lateral wall in mixing chamber, and electric heater can control the consistency of fused plastics.

As an alternative or complementary design to the above structure: bowl cover injection mold is including die body and last die body down, and the die cavity is located down between die body and the last die body, is provided with the gas jar in one side of pay-off structure, and this gas jar is connected with the gas spray gun, and the gas spray gun is used for purging and heating the die cavity. In this design, gas spray gun's main effect is to burning the inside wall in die cavity, and the flame of burning not only can blast the inside wall in die cavity, improves the cleanliness factor of die cavity, can also preheat the die cavity.

As an alternative or complementary design to the above structure: and a tool rack is also arranged on one side of the feeding structure.

The invention has the beneficial effects that:

1. the feeder in the scheme can realize the integration of functions such as plastic stirring, plastic conveying, uniform mixing and the like by matching with the second-order stepped outer shell, thereby effectively simplifying the structure of equipment; meanwhile, the separation of stirring and conveying functions can be realized by the mutually independent structure of the upper and lower packing augers of the feeder and the mutually unidirectional transmission mode, so that the stirring work can be independently executed;

2. the auxiliary stirrer in the scheme can increase the uniform stirring speed of the plastic in the stirring cavity, and can also be used as power for driving the feeder to rotate, so that the plastic extruding mechanism is multipurpose, the structure of the plastic extruding mechanism is simplified, and the structure integration is realized;

3. utilize in this scheme the mixing chamber of shell body, carry the chamber and stir the lateral wall in chamber and set up different accuse temperature modes respectively, can make molten plastics have the consistency of different degrees and different mobility in three chamber, carry out the control by temperature change management according to the needs that the functions such as stirring, transport, mixing are ropy to plastics, realize energy-conserving and in the same direction as the good production.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic structural view of a semi-automatic plastic extrusion mechanism for cup cover molding in the present scheme;

FIG. 2 is a view of the configuration of the center rod in cooperation with the feed gear;

FIG. 3 is a view showing the configuration of the feeder and the stirring screw in the stirring chamber;

fig. 4 is a structure view of the injection mold of the cup cover.

In the figure: 1-cup cover injection mold; 11-a lower die body; 12-an upper die body; 13-exhaust hole; 14-a mould cavity; 15-injection molding mouth; 2-an injection molding table; 21-plastic outlet; 3-a feeding structure; 31-a feeder; 311-cone head part; 312-mounting an auger; 3121-a central rod; 3122-pawl; 313-a packing auger is arranged; 314-a feed gear; 3141-ratchet; 32-an auxiliary stirrer; 321-a stirring motor; 322-stirring screw; 323-stirring gear; 33-an outer shell; 331-a vertical plate; 332-a feeding head; 34-a heating medium cavity; 35-a tool holder; 36-a thermal insulation medium cavity; 37-an electric heater; 4-a gas tank; 41-gas spray gun.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and the described embodiments are only a part of the embodiments, but not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts will belong to the protection scope of the present solution based on the embodiments in the present solution.

Example 1

As shown in fig. 1 to 4, the present embodiment designs a semi-automatic plastic extruding mechanism for forming a cup lid, which includes a cup lid injection mold 1, an injection molding table 2 and a feeding structure 3.

The cup cover injection mold 1 comprises a lower mold body 11 and an upper mold body 12, a mold cavity 14 is arranged inside the cup cover injection mold 1, the lower mold body 11 is rotatably connected with the upper mold body 12, an injection port 15 communicated with the mold cavity 14 is formed in the bottom of the cup cover injection mold 1, the mold cavity 14 is located between the lower mold body 11 and the upper mold body 12, in addition, a core mold is further arranged on the lower portion of the lower mold body 11, the injection port 15 is located under the core mold, a channel used for communicating the mold cavity 14 with the injection port 15 is formed between the lower mold body 11 and the core mold, and plastic in a molten state can be injected into the mold cavity 14 through the injection port 15 and the channel successively. An exhaust opening 13 is provided in the upper mold body 12, which exhaust opening 13 can connect the mold cavity 14 to the outside environment and can be used for exhausting air.

Be provided with gas jar 4 in one side of pay-off structure 3, this gas jar 4 is connected with gas spray gun 41, the bowl cover shaping back in bowl cover injection mold 1, take out fashioned bowl cover, then utilize gas spray gun 41 to burn the lateral wall in membrane chamber, gas spray gun 41 spun flame not only can blast the lateral wall of die cavity 14, improve die cavity 14's cleanliness factor, can also heat die cavity 14, guarantee that the plastics that get into in die cavity 14 can not solidify in advance.

The injection molding opening 15 on the cup cover injection mold 1 is in a taper hole shape, the table top of the injection molding table 2 is provided with a frustum-shaped plastic outlet 21 corresponding to the injection molding opening 15 in shape, and the feeding structure 3 can convey the molten plastic to the injection molding opening 15 for output. In addition, this platform 2 of moulding plastics is removable, consequently, can set up one or more and go out to mould mouthful 21 according to the position that different bowl covers required moulding plastics, when only going out to mould mouthful 21, this platform 2 of moulding plastics plays the effect of water conservancy diversion, and when only going out to mould mouthful 21, this platform 2 of moulding plastics plays the effect of reposition of redundant personnel to the import of this platform 2 of moulding plastics is only one all the time at above-mentioned in-process. When the injection port 15 is butted with the plastic outlet 21, the plastic in a molten state in the blending cavity can be injected into the mold cavity 14.

Wherein, the outer shell 33 is provided with a mixing cavity, a conveying cavity, a stirring cavity and a gear cavity in sequence from top to bottom; a heating medium cavity 34 is arranged in the side wall of the stirring cavity, and when the heating medium cavity 34 is used for conveying liquid or gaseous high-temperature medium, the plastic in the stirring cavity is heated and melted. A heat preservation medium cavity 36 is arranged in the side wall of the conveying cavity, and the heat preservation medium cavity 36 is used for conveying liquid medium or gaseous medium which enables the plastic to keep a molten state. The upper part of the outer shell 33 forms a feeding head 332, the blending cavity is positioned in the feeding head 332, and an electric heater 37 is embedded in the side wall of the blending cavity to control the fluidity of the plastic in a molten state.

The feeder 31 is vertically arranged in the outer shell 33, and the feeder 31 comprises a conical head 311, an upper packing auger 312, a lower packing auger 313, a feeding gear 314 and other structures which are sequentially arranged from top to bottom and are coaxial. The conical head part 311 is conical or frustum-shaped and is arranged in the mixing cavity, the upper packing auger 312 is arranged in the conveying cavity in a matching way and is used for conveying the molten plastic, the lower packing auger 313 is arranged in the stirring cavity, and the helicity of the lower packing auger 313 is smaller than that of the upper packing auger 312; the feed gear 314 is disposed within the gear cavity; a central rod 3121 is fixedly connected to the lower part of the upper auger 312, a feeding gear 314 is fixedly connected to the lower part of the lower auger 313, the lower end of the central rod 3121 penetrates through the centers of the lower auger 313 and the feeding gear 314, a ratchet 3141 is arranged on the inner side of the feeding gear 314, a pawl 3122 is rotatably connected to the central rod 3121, and the upper auger 312 is driven to rotate by the pawl 3122 when the feeding gear 314 rotates in the forward direction; when the feeding gear 314 rotates reversely, the upper packing auger 312 cannot rotate along with the feeding gear 314, and the feeding gear 314 and the upper packing auger 312 can be matched in a one-way transmission manner through the structure; above structure can realize the separation of stirring function and transport function for the stirring operation can be accomplished alone, and when plastics just begin to add and not complete melting, go up auger 312 and can not carry plastics, and take place to block up when avoiding not melting plastics to enter into the mixing intracavity.

The auxiliary stirrer 32 is arranged on the feeding structure 3, and the auxiliary stirrer 32 can assist the lower auger 313 to complete stirring operation; the auxiliary stirrer 32 comprises a stirring motor 321, a stirring screw rod 322 and a stirring gear 323, wherein the stirring screw rod 322 is vertically arranged in the stirring cavity, the stirring motor 321 is fixed on the outer shell 33, the rotating shaft of the stirring motor 321 is connected with the upper end of the stirring screw rod 322, and the stirring gear 323 is connected with the lower end of the stirring screw rod 322 and is meshed with the feeding gear 314. The thread direction of the stirring screw 322 is the same as that of the lower auger 313, and the stirring gear 323 is meshed with the feeding gear 314, so that the stirring screw 322 and the lower auger 313 always rotate in opposite directions, the plastic conveying directions of the stirring screw 322 and the lower auger 313 are opposite, the plastic can be quickly stirred in a small space, and the feeder 31 can be driven by the stirring motor 321.

Four stirring screws 322 taking the lower auger 313 as the center are arranged around the lower auger 313, the four stirring screws 322 are distributed annularly, and each stirring screw 322 is driven by one stirring motor 321; all the stirring motors 321 can rotate synchronously in the forward direction or the reverse direction. The whole stirring cavity is quadrilateral, the four stirring screws 322 are respectively positioned at four corners, and a vertical plate 331 can be arranged between the adjacent stirring screws 322, so that the molten plastics are guided to the lower auger 313 in the rotating process of the stirring screws 322.

A tool rack 35 is arranged on one side of the feeding structure 3, and tools such as an igniter, a wrench, a clamp and a brush which are convenient to use can be placed on the tool rack 35.

When the scheme in this embodiment is used, the conical head 311, the upper auger 312 and the lower auger 313 of the feeder 31 are coaxial, and can be respectively matched with three chambers such as a blending chamber, a conveying chamber and a stirring chamber to respectively realize functions of blending, pressurizing, stirring and the like. When the feeder 31 rotates forwards, because the spiral degree of the lower auger 313 is smaller than that of the upper auger 312, the lower auger 313 can provide more molten plastic than the plastic conveyed by the upper auger 312, and the redundant plastic in a molten state rolls towards the radial outer side of the lower auger 313, so that the plastic is conveyed and stirred simultaneously. And the conical head part 311 connected with the upper end of the upper auger 312 is matched with the mixing cavity to realize the control of the plastic conveying speed and the uniformity. When the feeder 31 rotates reversely, only the lower auger 313 pushes the material downwards under the driving of the stirring motor 321, and the upper auger 312 does not rotate, so that the separation of the stirring function and the conveying function is realized. In addition, can set up respectively to different accuse temperature in the lateral wall in mixing chamber, transport chamber and stirring chamber, can make molten plastics have the viscidity of different degree and different mobility in three chambeies, can carry out the control by temperature change management according to the needs that the thick to plastics of functions such as stirring, transport, mixing, realize energy-conserving and the smooth production. And can use vapor to realize accuse temperature respectively in stirring chamber and delivery chamber punishment, realize the synchronous supply of heat and unified management of many equipment when synchronous use, and the reason that the mixing chamber adopts electric heater 37 is that can realize different equipment independent control, can extrude plastics as required fast and independent control and glue thick degree. What needs manual operation in the above-mentioned process is the start and stop of feeder, the taking out of bowl cover model and the cleaning of die cavity in bowl cover injection mold 1.

The above examples are merely for clearly illustrating the examples and are not intended to limit the embodiments; and are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this technology may be resorted to while remaining within the scope of the technology.

Claims

1. The utility model provides a be used for fashioned semi-automatic plastics extrusion mechanism of bowl cover which characterized in that: comprises a cup cover injection mold (1), an injection molding table (2) and a feeding structure (3); the feeding structure (3) comprises an outer shell (33) and a feeder (31), wherein the outer shell (33) is sequentially provided with a blending cavity, a conveying cavity and a stirring cavity from top to bottom; feeder (31) is vertical to be set up in shell body (33), and this feeder (31) includes from last to down set gradually and coaxial conical head portion (311), go up auger (312) and auger (313) down, conical head portion (311) are conical or frustum shape and place in the mixing intracavity, go up auger (312) and arrange in the transport chamber and be used for carrying fused plastics, auger (313) are arranged in the stirring chamber and its helicity is less than upper auger (312) down, and the internal diameter of stirring chamber is greater than the external diameter messenger plastics of auger (313) down and can radially outwards roll; a frustum-shaped plastic outlet (21) is formed in the table top of the injection molding table (2), a mold cavity (14) is formed in the cup cover injection mold (1), an injection molding port (15) communicated with the mold cavity (14) is formed in the bottom of the cup cover injection mold (1), and when the injection molding port (15) is in butt joint with the plastic outlet (21), plastic in a molten state in the blending cavity can be injected into the mold cavity (14); the lower part of the upper packing auger (312) is fixedly connected with a central rod (3121), the lower part of the lower packing auger (313) is fixedly connected with a feeding gear (314), and the lower end of the central rod (3121) penetrates through the center of the lower packing auger (313) and is in one-way transmission fit with the feeding gear (314).

2. The semi-automatic plastic extrusion mechanism for cup cover molding of claim 1, characterized in that: the inner side of the feeding gear (314) is provided with a ratchet (3141), the central rod (3121) is rotatably connected with a pawl (3122), and the feeding gear (314) drives the upper packing auger (312) to rotate through the pawl (3122) when rotating in the positive direction.

3. The semi-automatic plastic extrusion mechanism for cup cover forming of claim 2, characterized in that: an auxiliary stirrer (32) is arranged on the feeding structure (3), the auxiliary stirrer (32) comprises a stirring motor (321), a stirring screw rod (322) and a stirring gear (323), the stirring screw rod (322) is vertically arranged in the stirring cavity, the stirring motor (321) is fixed on the outer shell (33), the rotating shaft of the stirring motor is connected with the upper end of the stirring screw rod (322), and the stirring gear (323) is connected at the lower end of the stirring screw rod (322) and meshed with the feeding gear (314).

4. The semi-automatic plastic extrusion mechanism for cup cover forming of claim 3, characterized in that: a plurality of stirring screws (322) taking the lower auger (313) as the center are arranged around the lower auger, and each stirring screw (322) is driven by a stirring motor (321); all the stirring motors (321) can rotate forwards or backwards synchronously.

5. The semi-automatic plastic extrusion mechanism for cup cover molding of claim 1, characterized in that: a heating medium cavity (34) is arranged in the side wall of the stirring cavity, and when the heating medium cavity (34) is used for conveying liquid or gaseous high-temperature medium, the plastic in the stirring cavity is heated and melted.

6. The semi-automatic plastic extrusion mechanism for cup cover forming of claim 5, characterized in that: and a heat-insulating medium cavity (36) is arranged in the side wall of the conveying cavity, and the heat-insulating medium cavity (36) is used for conveying a liquid medium or a gaseous medium which enables the plastic to keep a molten state.

7. The semi-automatic plastic extrusion mechanism for cup cover forming of claim 6, characterized in that: the upper portion of shell body (33) constitutes pay-off head (332), and the mixing chamber is located pay-off head (332), and embedding has electric heater (37) in the lateral wall in mixing chamber, and electric heater (37) can control the consistency of molten plastics.

8. The semi-automatic plastic extrusion mechanism for cup cover molding of claim 1, characterized in that: bowl cover injection mold (1) is including die body (11) and last die body (12) down, and die body (11) and last die body (12) rotate each other and be connected down, and die cavity (14) are located down between die body (11) and last die body (12), are provided with gas jar (4) in one side of pay-off structure (3), and this gas jar (4) are connected with gas spray gun (41), and gas spray gun (41) are used for purging and heating die cavity (14).

9. The semi-automatic plastic extrusion mechanism for cup cover molding of claim 8, characterized in that: and a tool rack (35) is also arranged on one side of the feeding structure (3).