CN216992944U

CN216992944U - Glue coating assembly and screw type plasticizing device

Info

Publication number: CN216992944U
Application number: CN202122999514.0U
Authority: CN
Inventors: 王书萍; 孙晓波; 袁中华; 杜呈表; 周清华; 吴小廷; 刘媛
Original assignee: Borch Machinery Co Ltd
Current assignee: Borch Machinery Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-07-19
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses a laminating assembly, which comprises a laminating head and a non-return ring sleeved on the laminating head; the non-return ring comprises a limiting ring and a glue passing ring which are arranged one by one along the axial direction of the glue passing head, a channel for molten material to pass through is formed by the glue passing ring and the glue passing head in an enclosing mode, the glue passing ring can move along the axial direction of the glue passing head, so that the glue passing ring can move to a position between the glue passing ring and the limiting ring to form a glue inlet for the molten material to enter the channel, and the glue passing ring can move to abut against the limiting ring to seal the glue inlet; a plurality of protruding structures are arranged in the channel at intervals and used for crushing solids in the molten materials. It can refine the melt to make the melt can intensive mixing, melting, simultaneously, still can reduce the temperature of melt, can reduce design cooling time, improve production efficiency. The utility model also discloses a screw type plasticizing device.

Description

Glue coating assembly and screw type plasticizing device

Technical Field

The utility model relates to the technical field of injection molding, in particular to a glue passing assembly and a screw type plasticizing device.

Background

The plastic plasticization is the primary condition for realizing good injection and ensuring the quality of the molded product, and at present, the plasticization principle of the plastic is as follows: during preplasticizing, the screw rotates to continuously push the material falling into the screw groove from the material port forward, the heating ring transfers heat to the material in the screw groove through the wall of the material barrel, the solid material is plasticized and melted through the thermal history of each functional section of the screw under the dual actions of external heating and screw rotating and shearing, the melt pushes away the non-return ring, flows into the material storage chamber of the material barrel through the channel in the screw head, generates back pressure to push the screw to move backward to complete the metering of the melt, and during injection, the screw plays the role of a plunger and rapidly moves forward under the action of an oil cylinder to inject the melt in the material storage chamber into a mold through a nozzle.

At present, the screw head mainly comprises a glue passing head, a glue passing ring and a limiting ring (the glue passing ring and the limiting ring form the check ring), the glue passing ring and the limiting ring are arranged on the glue passing head, a channel is formed between the glue passing head and the glue passing ring, one end of the channel is communicated with a screw groove through a glue inlet between the glue passing ring and the limiting ring, the other end of the channel is communicated with a storage chamber, and when the screw head is used, the glue passing ring is pushed by melt pressure to move back and forth to enable the glue passing ring and the limiting ring to be attached tightly and enable the glue passing ring and the limiting ring to form a glue inlet between the glue passing ring and the limiting ring, so that the channel is opened after plasticizing and the channel is closed after metering is finished.

However, in practical applications, after the molten material flows through the channel to the storage chamber by the above-mentioned plasticizing action, the molten material still cannot be sufficiently melted, homogenized and mixed, and the quality of the molded product has defects.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide the glue passing assembly which can refine the molten material so that the molten material can be fully mixed and melted, and meanwhile, the temperature of the molten material can be reduced, the setting and cooling time can be reduced, and the production efficiency can be improved; the utility model also provides a screw type plasticizing device.

The purpose of the utility model is realized by adopting the following technical scheme:

the glue passing assembly comprises a glue passing head and a check ring sleeved on the glue passing head;

the non-return ring comprises a limiting ring and a glue passing ring which are arranged one by one along the axial direction of the glue passing head, a channel for a molten material to pass through is formed by the glue passing ring and the glue passing head in a surrounding mode, and the glue passing ring can move along the axial direction of the glue passing head, so that the glue passing ring can move to a position between the glue passing ring and the limiting ring to form a glue inlet for the molten material to enter the channel, and the glue passing ring can move to be abutted against the limiting ring to seal the glue inlet;

a plurality of protruding structures are arranged in the channel at intervals and used for crushing solids in the molten materials.

Furthermore, the protruding structures are arranged on the glue passing head, and the protruding structures and the inner wall of the glue passing ring are arranged at intervals.

Furthermore, the protruding structure is equipped with many circles, and each circle protruding structure sets up according to the preface along cross the axial of gluing the head, and each circle protruding structure all includes around cross a plurality of protruding structures that the axial interval of gluing the head laid.

Furthermore, the front end of the rubber passing ring can be axially movably clamped on the rubber passing head, and the rubber passing head, the rubber passing ring and the limiting ring can synchronously rotate along with the screw rod.

Furthermore, the head of the adhesive passing head is provided with a plurality of slots distributed around the axial direction of the adhesive passing head, the front end of the adhesive passing ring extends forwards to form a plurality of inserting parts, and the inserting parts are inserted into the slots in a one-to-one correspondence manner so as to clamp the adhesive passing ring on the adhesive passing head.

Furthermore, at least one side wall of the slot is provided with a first wedge-shaped surface, at least one side wall of the insertion part is provided with a second wedge-shaped surface, and the second wedge-shaped surface is abutted against the first wedge-shaped surface.

Furthermore, a first glue outlet communicated with the channel is formed by enclosing the inserting part and the bottom wall of the slot.

Furthermore, the head of the rubber passing head is also provided with a limiting end face, the front end of the rubber passing ring is also provided with a limiting bulge positioned between two adjacent plug-in parts, and the limiting bulge can abut against the limiting end face.

Furthermore, a second glue outlet communicated with the channel is formed by enclosing the limiting end face and the front end of the glue passing ring.

The screw type plasticizing device comprises a charging barrel, a screw, a heating element and the glue passing component, wherein one end of the glue passing head, which is far away from the head of the glue passing head, is connected with the front end of the screw.

Compared with the prior art, the utility model has the beneficial effects that:

in the use process of the laminating component, the melt plasticized by the screw enters the channel through the glue inlet, the melt is violently collided with the convex structures in the flowing process of the channel, and the melt is repeatedly divided and converged by the convex structures, so that the solid in the melt is continuously refined, the melt is sufficiently homogenized and melted, and the melt is sufficiently plasticized, in addition, the melt and the convex structures are mutually rubbed, and the melt is also mutually rubbed with the inner wall of the laminating ring and the outer wall of the laminating head wrapped by the laminating ring in the rotating process of the screw to drive the laminating component to rotate to generate heat, thereby being beneficial to further accelerating the melting, meanwhile, the solid in the melt continuously absorbs heat from the melt in the melting process, the temperature of the melt can be reduced, the temperature of the melt ejected by the laminating component is lower, and the shaping and cooling time can be reduced, the production efficiency is improved.

According to the screw type plasticizing device, due to the adoption of the glue passing assembly, the molten material can be refined, so that the molten material can be fully mixed and melted, meanwhile, the temperature of the molten material can be reduced, the shaping and cooling time can be shortened, and the production efficiency can be improved.

Drawings

FIG. 1 is a schematic structural view of a laminating assembly according to the present invention in a first state;

FIG. 2 is a schematic structural view of the glue spreading assembly of the present invention in a second state;

FIG. 3 is a schematic structural view of the glue spreading assembly of the present invention in a third state;

FIG. 4 is an exploded view of the laminating assembly of the present invention;

FIG. 5 is a cross-sectional view of a laminating assembly in accordance with the present invention.

In the figure: 10. passing through a glue head; 11. a raised structure; 12. a slot; 121. a first wedge-shaped face; 13. a limiting end face; 20. a non-return ring; 21. passing through a glue ring; 211. a plug-in part; 2111. a second wedge-shaped face; 212. a limiting bulge; 22. a limiting ring; 30. a channel; 40. a glue inlet; 50. a first glue outlet; 60. and a second glue outlet.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

Referring to fig. 1-5, a gluing assembly according to a preferred embodiment of the present invention is shown, including a gluing head 10 and a non-return ring 20 disposed on the gluing head 10; the non-return ring 20 comprises a glue passing ring 21 and a limiting ring 22 which are arranged one by one along the axial direction of the glue passing head 10, a channel 30 for a molten material to pass through is formed by the glue passing ring 21 and the glue passing head 10 in an enclosing manner, and the glue passing ring 21 can move along the axial direction of the glue passing head 10, so that the glue passing ring 21 can move to a position between the glue passing ring 21 and the limiting ring 22 to form a glue inlet 40 for the molten material to enter the channel 30, and the glue passing ring 21 can move to abut against the limiting ring 22 to seal the glue inlet 40; a plurality of raised structures 11 are spaced apart in the channel 30, and the raised structures 11 are used to crush solids in the molten material.

In the use process of the laminating component, the melt plasticized by the screw enters the channel 30 through the glue inlet 40, the melt collides with the convex structures 11 violently in the flowing process of the channel 30, and the melt is divided and converged for multiple times by the convex structures 11, so that the solid in the melt is continuously refined, the melt is sufficiently homogenized and melted, and the melt is sufficiently plasticized, in addition, the melt and the convex structures 11 rub against each other, and the melt also rubs against the inner wall of the laminating ring 21 and the outer wall of the laminating head 10 wrapped by the laminating ring 21 to generate heat in the rotating process of the screw driving the laminating component to rotate, which is beneficial to further accelerating the melting of the melt, meanwhile, the solid in the melt continuously absorbs heat from the melt in the melting process, the temperature of the melt can be reduced, and the temperature of the melt ejected by the laminating component is lower, the shaping and cooling time can be reduced, and the production efficiency is improved.

Specifically, in this embodiment, protruding structure 11 is established on gluing head 10, each protruding structure 11 all with cross the interval setting between the inner wall of gluey ring 21, can supply the melt to more smoothly pass through passageway 30 in, make the melt and cross the area of contact between the inner wall of gluey ring 21 bigger, increase the friction between the inner wall of melt and gluey ring 21, make the melt produce more heat and make the melt more abundant, simultaneously, because of interval setting between each protruding structure 11 and the inner wall of gluing ring 21, can supply to cross gluey ring 21 and remove more smoothly under the promotion of melt pressure, so that advance jiao kou 40 can in time be sealed and opened, in addition, because protruding structure 11 is established on gluing head 10, can reduce the assembly degree of difficulty of gluing ring 21, more convenient assembly.

Of course, in other embodiments, the protruding structures 11 may be disposed on the inner wall of the glue passing ring 21, and on the basis of this, each protruding structure 11 is spaced apart from the outer wall of the glue passing head 10.

In the present embodiment, the protruding structures 11 are provided with a plurality of circles, each circle of the protruding structures 11 is sequentially disposed along the axial direction of the channel 30, and each circle of the protruding structures 11 includes a plurality of protruding structures 11 spaced apart from each other along the axial direction of the channel 30, so that the molten material can be divided and merged for a plurality of times when passing through the channel 30, and the moving direction and position of the molten material are continuously changed, so that the molten material is melted and plasticized more sufficiently and the temperature of the molten material is further reduced.

Of course, in other embodiments, multiple raised structures 11 may be helically arranged around the axis of channel 30, and may also serve to split and merge melt multiple times.

In this embodiment, the front end of the glue passing ring 21 is axially movably clamped on the glue passing head 10, and the glue passing head 10, the glue passing ring 21 and the limiting ring 22 can synchronously rotate along with the screw, that is, the glue passing ring 21 can axially move relative to the glue passing head 10 only under the action of melt pressure, the glue passing ring 21 is fixedly connected with the glue passing head 10 due to being clamped on the glue passing head 10 when no melt pressure exists, the glue passing head 10, the glue passing ring 21 and the limiting ring 22 and the screw can synchronously rotate during plasticizing of the screw, so that no relative movement exists between the contact surfaces of the glue passing ring 21 and the glue passing head 10 and between the contact surfaces of the glue passing ring 21 and the limiting ring 22, no friction is generated, abrasion of the glue passing assembly is reduced, unstable injection terminal caused by an excessively large moving distance of the glue passing ring 21 in the use process is prevented, or the glue passing ring 21 cannot rapidly close the glue inlet 40 caused by an excessively large moving distance of the glue passing ring 21 in the use process, and lead to some melt in the passageway 30 to flow back to the thread groove to lead to the melt measurement inaccurate, influence the weight and the size of goods, in addition, cross the concentricity that can better keep and the screw rod after gluing ring 21 and gluing head 10 are fixed, can not take place to cross the condition that gluing ring 21 was blocked, and the displacement distance when can better control cross gluey ring 21 injection increases the precision of injection.

Specifically, in this embodiment, the head of the glue passing head 10 is provided with a plurality of slots 12 arranged around the axial direction thereof, the front end of the glue passing ring 21 extends forward to form a plurality of inserting parts 211, and the inserting parts 211 are inserted into the slots 12 in a one-to-one correspondence manner, so that the structure can perform reliable connection on the glue passing ring 21 and the glue passing head 10 by using the inserting and matching of the inserting parts 211 and the slots 12, and meanwhile, the glue passing ring 21 can be circumferentially limited, thereby preventing the glue passing ring 21 from rotating relative to the glue passing head 10, and reducing the wear of the glue passing assembly.

Specifically, in the present embodiment, at least one side wall of the insertion slot 12 is provided with a first wedge surface 121, at least one side wall of the insertion part 211 is provided with a second wedge surface 2111, and the second wedge surface 2111 abuts against the first wedge surface 121, so that the connection between the glue passing ring 21 and the glue passing head 10 is more reliable, and the glue passing ring 21 is prevented from moving axially relative to the glue passing head 10 without melt pressure.

Specifically, in the present embodiment, two opposite sidewalls of the slot 12 are respectively provided with a first wedge surface 121, two opposite sidewalls of the inserting portion 211 are respectively provided with a second wedge surface 2111, and each second wedge surface 2111 is in one-to-one contact with each first wedge surface 121, so that the connection between the glue passing ring 21 and the glue passing head 10 is more reliable.

Specifically, in the present embodiment, the first wedge-shaped surface 121 is an inclined surface inclined from bottom to top toward the center of the slot 12, and the second wedge-shaped surface 2111 and the first wedge-shaped surface 121 are adapted to abut against each other, so that the glue passing ring 21 is reliably mounted on the glue passing head 10.

Specifically, in the present embodiment, the insertion portion 211 and the bottom wall of the insertion slot 12 enclose a first glue outlet 50 communicated with the channel 30, so that the melt in the channel 30 can flow to the storage chamber through the first glue outlet.

Specifically, in this embodiment, the head of the glue passing head 10 is further provided with a limiting end surface 13, the front end of the glue passing ring 21 is further provided with a limiting protrusion 212 located between two adjacent inserting parts 211, and the limiting protrusion 212 can abut against the limiting end surface 13. When the rubber ring 21 moves to the position between the rubber ring 21 and the limiting ring 22 to form the rubber inlet 40, the limiting protrusion 212 is abutted to the limiting end face 13 to axially limit the rubber ring 21, the rubber ring 21 is prevented from being separated from the rubber head 10, when the rubber ring 21 moves to the position abutted to the limiting ring 22 to seal the rubber inlet 40, the limiting protrusion 212 is separated from the limiting end face 13, and the insertion part 211 is always kept in fit with the slot 12.

In this embodiment, the second glue outlet 60 communicating with the channel 30 is formed by enclosing the limiting end surface 13 and the front end of the glue passing ring 21, and the setting of the second glue outlet 60 can supply the molten material in the channel 30 to flow to the storage chamber quickly, which is beneficial to improving the production efficiency.

In conclusion, the gluing component has the following advantages:

the arrangement of the convex structure 11 can thin the solid in the melting material, change the moving direction and position of the melting material, achieve the purposes of strengthening the melting, plasticizing and mixing capability and reducing the temperature of the melting material, realize the low-temperature plasticizing and pressure fluctuation of the melting material, shorten the molding period of products and improve the production efficiency;

secondly, because of crossing gluey ring 21 card and establishing on crossing gluey head 10, reducible wearing and tearing make and cross gluey ring 21 and can move fast and seal into gluey mouth 40 to offset with spacing ring 22, reducible melt is adverse current, and then makes the weight and the size stability of goods, promotes the precision of injection products.

The utility model also provides a screw type plasticizing device which comprises a charging barrel, a screw, a heating element (generally a heating ring sleeved on the charging barrel) and the glue passing component, wherein one end of the glue passing head 10, far away from the head part, is connected with the front end of the screw.

The screw type plasticizing device provided by the utility model adopts the glue passing assembly, so that the molten material can be refined, the molten material can be fully mixed and melted, meanwhile, the temperature of the molten material can be reduced, the shaping and cooling time can be reduced, and the production efficiency can be improved.

The working principle of the screw type plasticizing device is as follows:

preplasticizing: the screw rotates to continuously push the material falling into the screw groove from the material port, the heating ring transfers heat to the material in the screw groove through the wall of the material cylinder, and the solid material is plasticized and melted under the dual actions of external heating and screw rotating and shearing through the thermal history of each functional section of the screw;

secondary plasticization: the melt enters the channel 30 through the inlet 40 after being plasticized by the screw (the melt in the channel 30 is pushed away by the melt in the groove to open the inlet 40), the melt in the channel 30 is repeatedly split and merged by the convex structure 11, so that the solid in the melt is continuously refined, the heat exchange area of the refined solid is larger than that of the unrefined solid, meanwhile, the melt in the channel 30 is continuously changed in the flowing process by the glue passing component along with the rotation of the screw, the melt can not only rub against the inner wall of the glue passing ring 21 to generate heat, but also be beneficial to accelerating the melting of the solid of the melt, so that the melt is fully homogenized and melted to be fully plasticized, meanwhile, the solid in the melt continuously absorbs heat from the melt in the melting process, the temperature of the melt can be reduced, and the temperature of the melt ejected by the glue passing component is lower, the shaping and cooling time can be reduced, and the production efficiency is improved;

metering: when the molten material in the storage chamber reaches the set volume, the molten material backpressure is generated in the storage chamber, the molten material backpressure pushes the rubber ring 21 to move to abut against the limiting ring 22 to seal the rubber inlet 40, so that the molten material in the storage chamber is prevented from flowing back to the screw groove through the channel 30, and the metering is finished;

and (3) injection: the screw rod moves forwards rapidly under the action of the oil cylinder, and the melt in the storage chamber is injected into the die through the nozzle.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The glue passing assembly is characterized by comprising a glue passing head and a check ring sleeved on the glue passing head;

the non-return ring comprises a glue passing ring and a limiting ring which are arranged one by one along the axial direction of the glue passing head, a channel for molten materials to pass through is formed by the glue passing ring and the glue passing head in a surrounding mode, and the glue passing ring can move along the axial direction of the glue passing head, so that the glue passing ring can move to a position between the glue passing ring and the limiting ring to form a glue inlet for the molten materials to enter the channel, and the glue passing ring can move to be abutted against the limiting ring to seal the glue inlet;

a plurality of protruding structures are arranged in the channel at intervals and used for crushing solids in the molten material.

2. The gluing assembly of claim 1, wherein the raised structures are disposed on the gluing head, and each raised structure is spaced apart from an inner wall of the gluing ring.

3. The laminating assembly of claim 1, wherein the raised structures are provided in a plurality of turns, each turn of the raised structures being sequentially arranged along the axial direction of the channel, and each turn of the raised structures comprises a plurality of raised structures spaced around the axial direction of the channel.

4. The gluing assembly of claim 1, wherein the front end of the gluing ring is axially movably clamped on the gluing head, and the gluing head, the gluing ring and the limiting ring can synchronously rotate along with the screw.

5. The gluing assembly of claim 1, wherein the head of the gluing head is provided with a plurality of slots arranged around the head in the axial direction, the front end of the gluing ring extends forward to form a plurality of inserting parts, and the inserting parts are inserted into the slots in a one-to-one correspondence manner to clamp the gluing ring on the gluing head.

6. The gluing assembly of claim 5, wherein at least one sidewall of the slot is provided with a first wedge surface, at least one sidewall of the insertion portion is provided with a second wedge surface, and the second wedge surface abuts against the first wedge surface.

7. The gluing assembly of claim 6, wherein a first glue outlet communicated with the channel is defined between the insertion part and a bottom wall of the slot.

8. The gluing assembly of claim 5, wherein the head of the gluing head is further provided with a limiting end surface, the front end of the gluing ring is further provided with a limiting protrusion positioned between two adjacent inserting parts, and the limiting protrusion can abut against the limiting end surface.

9. The glue assembly of claim 8, wherein a second glue outlet is defined between the limiting end surface and the front end of the glue ring and is in communication with the channel.

10. Screw type plastifying device, characterized in that, including feed cylinder, screw rod, heating element and crosses glueing subassembly of any one of claim 1-9, the head of crossing glueing is connected with the front end of screw rod apart from its head.