CN212826692U - Double-screw plastic extruder - Google Patents
Double-screw plastic extruder Download PDFInfo
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- CN212826692U CN212826692U CN202020949322.1U CN202020949322U CN212826692U CN 212826692 U CN212826692 U CN 212826692U CN 202020949322 U CN202020949322 U CN 202020949322U CN 212826692 U CN212826692 U CN 212826692U
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Abstract
The utility model relates to a double-screw plastic extruder, which belongs to the field of plastic products and comprises a frame, wherein a first machine barrel and a second machine barrel which are parallel to each other are fixedly arranged on the frame, the second machine barrel is arranged below the first machine barrel, a first screw is arranged in the first machine barrel, the left side of the upper end of the first machine barrel is provided with a first opening, and the right side of the lower end of the first machine barrel is provided with a second opening; a second screw is arranged in the second cylinder, a third opening is formed in the right side of the upper end of the second cylinder and corresponds to the second opening, the third opening is communicated with the second opening through a connecting cylinder, the diameter of the connecting cylinder is the same as that of the first cylinder and the second cylinder, and a mouth mold is arranged at the left end of the second cylinder; a U-shaped side plate is further arranged between the first cylinder and the second cylinder, the edge of the side plate is connected with the surfaces of the first cylinder, the connecting cylinder and the second cylinder to form a sealing cavity, and a heating device is arranged in the sealing cavity. The utility model discloses can effectively get rid of the air in the material.
Description
Technical Field
The utility model relates to a plastic product field, in particular to two screw-type plastic extruder.
Background
The screw extruder is processing equipment which is used for extruding and stirring materials added into the screw extruder through a material hopper by means of pressure and shearing force generated by rotation of a screw, can fully plasticize and uniformly mix the materials, and then cools and forms the products through a neck mold.
At present, the material in the screw extruder on the market melts and the stirring process is all accomplished in the barrel, wherein, the screw is in the transportation and melts the in-process of material, because the material that adds through the hopper is graininess, forms the space easily between the material after melting, and this kind of condition can lead to having the air in the material that screw extruder extruded, and then the quality of the product that the influence cooling obtained.
SUMMERY OF THE UTILITY MODEL
Therefore, a double-screw plastic extruder is needed to be provided, which comprises a rack, wherein a first cylinder and a second cylinder which are parallel to each other are fixedly arranged on the rack, the second cylinder is arranged below the first cylinder, a first screw is arranged in the first cylinder, a first opening is arranged on the left side of the upper end of the first cylinder, and a second opening is arranged on the right side of the lower end of the first cylinder; a second screw is arranged in the second cylinder, a third opening is formed in the right side of the upper end of the second cylinder and corresponds to the second opening, the third opening is communicated with the second opening through a connecting cylinder, the diameter of the connecting cylinder is the same as that of the first cylinder and the second cylinder, and a mouth mold is arranged at the left end of the second cylinder; a U-shaped side plate is further arranged between the first cylinder and the second cylinder, the edge of the side plate is connected with the surfaces of the first cylinder, the connecting cylinder and the second cylinder to form a sealing cavity, and a heating device is arranged in the sealing cavity.
The left end of the first screw extends out of the first machine barrel and is in driving connection with a first driving motor arranged on the machine frame, and meanwhile, the part of the first screw penetrating through the first machine barrel is in rotatable sealing connection with the first machine barrel; the right end of the second screw rod extends out of the second machine barrel and is in driving connection with a second driving motor arranged on the machine frame, and meanwhile, the second screw rod penetrates through the part of the second machine barrel and is in rotatable sealing connection with the second machine barrel.
The utility model discloses during the use, at first start heating device, then start first screw rod, add the material in first barrel from first opening part, first screw rod in the first barrel promotes the material and moves right, simultaneously because first barrel is heated by heating device, consequently the material can progressively melt at the in-process of being carried by first screw rod, the material after melting can continue to be promoted to the right-hand member of first barrel by first screw rod then enters into the right-hand member of connecting cylinder and second barrel, treat that the material is carried one end time back by first screw rod, after having piled up the take the altitude promptly in the connecting cylinder, start the second screw rod, the second screw rod promotes the material in second barrel and the connecting cylinder and moves left, until extruding the material from the bush, the material is extruded from the bush, the material is cooled forming and is obtained the product after being extruded from the bush.
The utility model melts and stirs the material through the first machine barrel and the first screw rod, and the first screw rod can convey the material to the connecting cylinder when melting and stirring the material, wherein, after the melted material enters the connecting cylinder from the first machine barrel, because the space in the connecting cylinder is far larger than the space between two adjacent threads on the first screw rod in the first machine barrel, the pressure intensity of the material compressed by the first screw rod is reduced after entering the connecting cylinder, the bubble existing in the melted material bursts at the moment, the gas in the bubble can overflow the material upwards along with the burst of the bubble and accumulate above the connecting cylinder, therefore, the air in the material can be discharged completely, namely, no gap exists in the material flowing and accumulating at the bottom of the connecting cylinder, and then the second screw rod pushes the material to leave the product obtained after the second machine barrel from the mouth mold, can effectively improve the quality of products.
The heating device of the utility model is arranged in the sealed cavity formed by the side plate, the first machine barrel, the connecting cylinder and the second machine barrel, so that the heating device can heat the first machine barrel, the second machine barrel and the connecting cylinder simultaneously, and can ensure that the material is always in a molten state when flowing through the connecting cylinder and the second machine barrel after being melted in the first machine barrel, thereby ensuring that the material smoothly moves in the connecting cylinder and the second machine barrel; and simultaneously, the utility model discloses a heating device is located sealed intracavity, consequently can effectively reduce the calorific loss when heating device heats first barrel, second barrel and connecting cylinder, can effectively provide energy utilization.
Further, the first opening part is provided with a feed hopper.
The material hopper is communicated with the first opening, and the opening of the material hopper is larger than the first opening, so that materials can be conveniently added into the first machine cylinder.
Further, the length of the second cylinder is longer than that of the first cylinder, the right end of the second cylinder is arranged to be aligned with the right end of the first cylinder, and the left end of the side plate is arranged to be aligned with the left end of the first cylinder.
The left end of the second machine barrel exceeds the sealing cavity, so that the material in the second machine barrel cannot be heated continuously by the heating device after passing through the left end of the sealing cavity, the material can be cooled gradually while moving at the left side part of the second machine barrel, and the smooth cooling and forming of the material leaving the second machine barrel from the neck mold can be guaranteed.
Further, the heating device is a cast iron heater.
Further, the surface of the part of the first cylinder and the second cylinder, which is positioned in the sealing cavity, is provided with fins.
The fins can increase the heat exchange area between the first cylinder and the heating device and between the second cylinder and the heating device, so that the heating efficiency of the heating device can be effectively improved, and the preheating time of the first cylinder and the second cylinder can be effectively reduced.
Further, an air hole is formed in the right side of the upper end of the first machine barrel and is located right above the connecting barrel.
When the air holes are used for discharging materials into the connecting cylinder, air bubbles in the air holes burst overflowed air, so that the condition that the continuity of the materials in the second machine cylinder is influenced due to excessive air accumulation in the first connecting cylinder and the first machine cylinder is avoided.
Wherein, the through-hole is observed the gas pocket and is had the material to spill over, can also judge whether the connecting cylinder is piled up to the material in the connecting cylinder to the operator in time adjusts the input speed of first barrel and the ejection of compact discharge speed of second barrel.
Further, the mouth mold is detachably arranged at the left end of the second cylinder.
The bush is connected with second barrel detachably, consequently can change the bush of different shapes, can make the utility model discloses better adaptability has.
Furthermore, the right end of the side face of the die is provided with a plurality of first connecting lugs, first through holes are formed in the first connecting lugs, the left end of the side face of the second machine barrel is provided with second connecting lugs corresponding to the first connecting lugs, the second connecting lugs are provided with second through holes corresponding to the first through holes, and the first connecting lugs are connected with the second connecting lugs through bolt structures.
The first connecting lug and the second connecting lug can be fixed together by penetrating the bolt through the first through hole and the second through hole, and then the neck ring die is fixed on the second machine barrel.
The principle and effect of the present invention will be further explained below with reference to the above technical solutions and the accompanying drawings:
the utility model melts and stirs the material through the first machine barrel and the first screw rod, and the first screw rod can convey the material to the connecting cylinder when melting and stirring the material, wherein, after the melted material enters the connecting cylinder from the first machine barrel, because the space in the connecting cylinder is far larger than the space between two adjacent threads on the first screw rod in the first machine barrel, the pressure intensity of the material compressed by the first screw rod is reduced after entering the connecting cylinder, the bubble existing in the melted material bursts at the moment, the gas in the bubble can overflow the material upwards along with the burst of the bubble and accumulate above the connecting cylinder, therefore, the air in the material can be discharged completely, namely, no gap exists in the material flowing and accumulating at the bottom of the connecting cylinder, and then the second screw rod pushes the material to leave the product obtained after the second machine barrel from the mouth mold, can effectively improve the quality of products.
Drawings
FIG. 1 is a schematic structural view of a twin-screw plastic extruder according to an embodiment of the present invention;
fig. 2 is a schematic view of a cross-sectional structure of a twin-screw plastic extruder according to an embodiment of the present invention.
Description of reference numerals:
1-a first cylinder, 11-a first screw, 12-a material hopper, 13-a first opening, 14-a second opening, 15-an air hole, 2-a second cylinder, 21-a second screw, 22-a die, 221-a first connecting lug, 23-a third opening, 24-a second connecting lug, 3-a connecting cylinder, 4-a side plate, 5-a sealed cavity, 51-a fin, 6-a heating device, 7-a first driving motor and 8-a second driving motor.
Detailed Description
To facilitate understanding of the invention for those skilled in the art, the invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1-2, a twin-screw plastic extruder comprises a frame (not shown in the figures), wherein a first cylinder 1 and a second cylinder 2 which are parallel to each other are fixedly arranged on the frame, the second cylinder 2 is arranged below the first cylinder 1, a first screw 11 is arranged in the first cylinder 1, a first opening 13 is arranged at the left side of the upper end of the first cylinder 1, and a second opening 14 is arranged at the right side of the lower end of the first cylinder 1; a second screw 21 is arranged in the second machine barrel 2, a third opening 23 is arranged on the right side of the upper end of the second machine barrel 2 corresponding to the second opening 14, the third opening 23 is communicated with the second opening 14 through a connecting barrel 3, the diameter of the connecting barrel 3 is the same as that of the first machine barrel 1 and the second machine barrel 2, and a mouth die 22 is arranged at the left end of the second machine barrel 2; a U-shaped side plate 4 is further arranged between the first machine barrel 1 and the second machine barrel 2, the edge of the side plate 4 is connected with the surfaces of the first machine barrel 1, the connecting barrel 3 and the second machine barrel 2 to form a sealing cavity 5, and a heating device 6 is arranged in the sealing cavity 5.
Wherein, the left end of the first screw 11 extends out of the first machine barrel 1 and is in driving connection with a first driving motor 7 arranged on the machine frame, and meanwhile, the first screw 11 passes through the part of the first machine barrel 1 and is rotatably and hermetically connected with the first machine barrel 1; the right end of the second screw 21 extends out of the second machine barrel 2 and is in driving connection with a second driving motor 8 arranged on the machine frame, and meanwhile, the second screw 21 passes through the part of the second machine barrel 2 and is in rotatable sealing connection with the second machine barrel 2.
When the utility model is used, the heating device 6 is firstly started, then the first screw 11 is started, the material is added into the first machine barrel 1 from the first opening 13, the first screw 11 in the first machine barrel 1 pushes the material to move rightwards, meanwhile, as the first machine barrel 1 is heated by the heating device 6, the material is gradually melted in the process of being conveyed by the first screw 11, the melted material is continuously pushed to the right end of the first machine barrel 1 by the first screw 11 and then enters the connecting barrel 3 and the right end of the second machine barrel 2, after the material is conveyed by the first screw 11 for a period of time, after the materials are stacked at a certain height in the connecting cylinder 3, the second screw 21 is started, the second screw 21 pushes the materials in the second cylinder 2 and the connecting cylinder 3 to move leftwards until the materials are extruded from the neck mold 22, and the materials are extruded from the neck mold 22 and then cooled and molded to obtain the product.
The utility model melts and stirs the material through the first machine barrel 1 and the first screw rod 11, and the first screw rod 11 melts and stirs the material and simultaneously conveys the material to the connecting cylinder 3, wherein, after the melted material enters the connecting cylinder 3 from the first machine barrel 1, because the space in the connecting cylinder 3 is far larger than the space between two adjacent threads on the first screw rod 11 in the first machine barrel 1, the pressure intensity of the material compressed by the first screw rod 11 is reduced after entering the connecting cylinder 3, the bubble existing in the melted material can burst at the moment, the gas in the bubble can overflow the material upwards along with the burst of the bubble and accumulate above the connecting cylinder 3, therefore, the air in the material can be discharged completely, namely, no gap exists in the material flowing into and accumulating at the bottom of the connecting cylinder 3, and then the second screw rod 21 pushes the material to leave the second machine barrel 2 from the mouth mold 22, and the obtained product has no gap, can effectively improve the quality of products.
The heating device 6 of the present invention is disposed in the sealing cavity 5 formed by the side plate 4, the first cylinder 1, the connecting cylinder and the second cylinder 2, so that the heating device 6 can heat the first cylinder 1, the second cylinder 2 and the connecting cylinder 3 at the same time, and can ensure that the material is always in a molten state when flowing through the connecting cylinder 3 and the second cylinder 2 after being melted in the first cylinder 1, so as to ensure that the material moves smoothly in the connecting cylinder 3 and the second cylinder 2; and simultaneously, the utility model discloses a heating device 6 is located seal chamber 5, consequently can effectively reduce the calorific loss when heating device 6 heats first barrel 1, second barrel 2 and connecting cylinder 3, can effectively provide energy utilization.
In one embodiment, a feed hopper is disposed at the first opening 13.
The hopper 12 is in communication with the first opening 13, and the opening of the hopper 12 is larger than the first opening 13, facilitating the addition of material into the first barrel 1.
In one embodiment, the length of the second barrel 2 is longer than the length of the first barrel 1, the right end of the second barrel 2 is aligned with the right end of the first barrel 1, and the left end of the side plate 4 is aligned with the left end of the first barrel 1.
The left end of the second machine barrel 2 is arranged beyond the sealing cavity 5, so that the material in the second machine barrel 2 cannot be heated continuously by the heating device 6 after passing through the left end of the sealing cavity 5, the material is cooled gradually while moving at the left side part of the second machine barrel 2, and the material leaving the second machine barrel 2 from the die 22 can be cooled and molded smoothly.
In one embodiment, the heating device 6 is a cast iron heater.
In one embodiment, the surface of the portions of the first barrel 1 and the second barrel 2 located in the seal cavity 5 is provided with fins 51.
The fins 51 can increase the heat exchange area between the first barrel 1 and the second barrel 2 and the heating device 6, thereby effectively providing the heating efficiency of the heating device 6 and effectively reducing the preheating time of the first barrel 1 and the second barrel 2.
In one embodiment, the right side of the upper end of the first cylinder 1 is provided with an air hole 15, and the air hole 15 is positioned right above the connecting cylinder 3.
The air holes 15 are used for discharging the materials into the connecting cylinder 3, and air bubbles therein burst overflowed air so as to avoid excessive accumulation of air in the first connecting cylinder 3 and the first machine cylinder 1 and influence on the continuity of the materials in the second machine cylinder 2.
Wherein, the through-hole is observed whether gas pocket 15 has the material to spill over, can also judge whether the material in the connecting cylinder 3 is piled up full connecting cylinder 3 to the operator in time adjusts the input speed of first barrel 1 and the ejection of compact speed of second barrel 2.
In one embodiment, the die 22 is detachably disposed at the left end of the second barrel 2.
22 are removably connected to the second barrel 2, so that the different shapes of the die 22 can be replaced, enabling the present invention to be more adaptable.
In one embodiment, a plurality of first connecting lugs 221 are arranged at the right end of the side surface of the neck mold 22, a first through hole is formed in each first connecting lug 221, a second connecting lug 24 is arranged at the left end of the side surface of the second machine barrel 2 corresponding to each first connecting lug 221, a second through hole is formed in each second connecting lug 24 corresponding to each first through hole, and the first connecting lugs 221 are connected with the second connecting lugs 24 through bolt structures.
The first connecting lug 221 and the second connecting lug 24 can be fixed together by passing a bolt through the first through hole and the second through hole, so as to fix the die 22 on the second machine barrel 2.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. A double-screw plastic extruder is characterized by comprising a rack, wherein a first machine barrel and a second machine barrel which are parallel to each other are fixedly arranged on the rack, the second machine barrel is arranged below the first machine barrel, a first screw is arranged in the first machine barrel, a first opening is formed in the left side of the upper end of the first machine barrel, and a second opening is formed in the right side of the lower end of the first machine barrel; a second screw is arranged in the second cylinder, a third opening is formed in the right side of the upper end of the second cylinder and corresponds to the second opening, the third opening is communicated with the second opening through a connecting cylinder, the diameter of the connecting cylinder is the same as that of the first cylinder and the second cylinder, and a mouth mold is arranged at the left end of the second cylinder; a U-shaped side plate is further arranged between the first cylinder and the second cylinder, the edge of the side plate is connected with the surfaces of the first cylinder, the connecting cylinder and the second cylinder to form a sealing cavity, and a heating device is arranged in the sealing cavity.
2. The twin screw plastic extruder of claim 1, wherein the first opening is provided with a feed hopper.
3. The twin screw plastic extruder of claim 1, wherein the length of the second barrel is longer than the length of the first barrel and the right end of the second barrel is disposed in alignment with the right end of the first barrel and the left end of the side plate is disposed in alignment with the left end of the first barrel.
4. The twin screw plastic extruder of claim 3, wherein the heating device is a cast iron heater.
5. The twin screw plastic extruder of claim 4, wherein the surfaces of the portions of the first and second barrels located within the sealed cavity are provided with fins.
6. The twin screw plastic extruder of claim 1, wherein the right side of the upper end of the first barrel is provided with an air vent, the air vent being located directly above the connecting barrel.
7. The twin screw plastic extruder of claim 6, wherein a first stopper ring is provided at an upper end of the air hole, a second stopper ring is provided at a lower end of the air hole, and a sealing plate is provided between the first stopper ring and the second stopper ring, and an upper end of the sealing plate is connected to a lower surface of the first stopper ring through a cylindrical spring.
8. The twin screw plastic extruder of claim 1, wherein the die is removably disposed at the left end of the second barrel.
9. The twin-screw plastic extruder of claim 8, wherein the right end of the side surface of the die is provided with a plurality of first connecting lugs, the first connecting lugs are provided with first through holes, the left end of the side surface of the second cylinder is provided with second connecting lugs corresponding to the first connecting lugs, the second connecting lugs are provided with second through holes corresponding to the first through holes, and the first connecting lugs and the second connecting lugs are connected through bolt structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949322.1U CN212826692U (en) | 2020-05-29 | 2020-05-29 | Double-screw plastic extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949322.1U CN212826692U (en) | 2020-05-29 | 2020-05-29 | Double-screw plastic extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212826692U true CN212826692U (en) | 2021-03-30 |
Family
ID=75168603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020949322.1U Active CN212826692U (en) | 2020-05-29 | 2020-05-29 | Double-screw plastic extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212826692U (en) |
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2020
- 2020-05-29 CN CN202020949322.1U patent/CN212826692U/en active Active
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