CN110142941A - A dust-free plastic particle production line - Google Patents

Abstract

The present invention relates to technical field of plastic particle production, can improve workshop condition, reduce production cost and labor intensity.A kind of dustless plastic pellet production line, including powder branch, pellet branch and extruding machine, wherein the powder branch includes starching machine, Scattered Kettle, the first powder bucket, the second powder bucket, the first weighing device and the second weighing device；The pellet branch includes pellet storehouse, pellet bucket and third weighing device, the outlet of grain bin bottom is connected to the feed inlet at the top of pellet bucket by the second pneumatic conveyer and the second delivery pipe, the outlet of grain feed hopper bottom is connect by being flexible coupling with the entrance of third weighing device, the outlet of third weighing device is connect by being flexible coupling with grain pipe out, and the lower part of grain pipe is arranged obliquely and connected with the second flour extraction pipe out；The extruding machine includes base, installation machine barrel on the base, is mounted on the press molds of machine barrel tail portion, and is mounted on the head of barrel head, and there are two feeding ports for machine barrel tool.

Description

A dust-free plastic particle production line

technical field

The invention relates to the technical field of plastic particle production, in particular to a dust-free plastic particle production line.

Background technique

The raw materials used in plastic molding in industry mainly include powder, granule, solution and dispersion. Part of the molding adopts monomer and prepolymer, and powder and granule are widely used. Powder is prepared by mixing and dispersing powdery raw material resin and various additives evenly. Granule is a mixed granular material made by plasticizing the powder and making it further plasticized by different methods. . The pellets can reduce the requirements for the molding process during processing, so that the molding is easy to operate.

In the process of plastic granulation, it is necessary to melt the granules, then add powder to melt, and then granulate. The entire production process requires two-step molding. Increased production costs. In addition, workers climb up the high platform, put the powder into the dispersing kettle for dispersion and stirring, weigh it on the weighing device, and then send it to the extruder together with the pellets in a certain weight ratio for extrusion. In the process of powder feeding, a large amount of powder will be scattered into the air. First, it will pollute the air environment of the workshop. Second, the raw materials will be wasted. Third, the labor intensity of workers is high. Most workshops will be equipped with bag dust collectors to recover dust. However, it requires workers to periodically recycle the powder from the dust bag of the bag filter for use, which is troublesome to use and needs to be improved.

SUMMARY OF THE INVENTION

The object of the present invention is to overcome the deficiencies in the above-mentioned background technology, and provide a dust-free plastic particle production line, which can automatically complete the feeding of powder and pellets, save plant space, and can recycle dust and improve workshop environment. , reduce the waste of raw materials, reduce production costs and labor intensity.

The technical purpose of the present invention is achieved in this way:

A dust-free plastic particle production line includes a powder branch, a pellet branch and an extruder, wherein,

The powder branch circuit includes a powder feeding machine, a dispersion kettle, a first powder hopper, a second powder hopper, a first weighing device and a second weighing device; Dust hood, the top of the dust hood is connected to the inlet of the fan through a pipe, the outlet of the fan is connected to the first inlets of the two dust separators respectively through the dust collecting pipe, and the outlet at the bottom of the powder feeder is connected to the top of the dispersion kettle through the first screw conveyor The inlet at the bottom of the dispersion kettle is connected to the second inlet of the two dust separators through the first pneumatic conveyor and the first conveying pipe; the two dust separators are respectively arranged on the top of the first powder hopper and the second powder hopper , the outlet at the bottom of the first powder hopper is connected to the inlet of the first weighing device through a soft connection, the outlet of the first weighing device is connected to the first powder outlet pipe through a soft connection, and the outlet at the bottom of the second powder hopper is connected to the first powder through a soft connection. The inlet of the second weighing device is connected, and the outlet of the second weighing device is connected with the second powder outlet pipe through a soft connection;

The pellet branch circuit includes a pellet silo, a pellet hopper and a third weighing device. The outlet at the bottom of the pellet silo is connected to the feed port at the top of the pellet hopper through a second pneumatic conveyor and a second conveying pipe. The outlet of the third weighing device is connected to the inlet of the third weighing device through a soft connection, and the outlet of the third weighing device is connected to the particle outlet pipe through a soft connection. The lower section of the second powder discharge pipe forms a mixed discharge pipe for powder and granules;

The extruder includes a machine base, a barrel installed on the base, an extrusion die installed at the tail of the barrel, and a head installed at the head of the barrel. The barrel has two feeding ports, the first One feeding port is located at the head of the barrel and is connected with the mixing discharge pipe, and the second feeding port is located in the middle of the barrel and is connected with the outlet of the screw conveyor, and the inlet of the screw conveyor is connected with the first powder outlet pipe.

Preferably, the dust separator includes a powder feeding section, a filtering section and a powder discharging section which are connected in sequence from top to bottom, the powder feeding section is fixedly supported on the first or second powder hopper by a bracket, and the first or second powder hopper is made of 1. The second inlet, the filter section is made of cylindrical filter cloth, which is used to filter dust and discharge air. The bottom of the powder outlet is connected to the inlet on the top of the first or second powder hopper.

Preferably, the first, second and third weighing devices include an electronic scale, a second screw conveyor and a weighing bucket, the second screw conveyor is fixedly installed on the electronic scale, and the second screw conveyor is fixed on the electronic scale. The outlet of the machine is used as the outlet of the weighing device, the inlet of the second screw conveyor is fixedly connected with the outlet at the bottom of the weighing bucket, and the inlet at the top of the weighing bucket is used as the inlet of the weighing device.

Preferably, the tops of the first powder hopper, the second powder hopper, the pellet hopper and the weighing hopper are all provided with auxiliary exhaust ports, and the auxiliary exhaust ports are covered with dust filters.

Preferably, the dust filter includes a frame arranged around the auxiliary exhaust port, and a dust filter cloth covered on the top surface of the frame and the surrounding outer walls.

Preferably, the dispersion kettle, the first powder hopper, the second powder hopper, the first weighing hopper and the second weighing hopper are all provided with a stirring shaft driven by a motor, and a stirring blade is arranged on the stirring shaft.

Preferably, the first powder hopper, the second powder hopper and the outlet at the bottom of the pellet hopper are respectively provided with electric valves.

Preferably, the first powder hopper, the second powder hopper and the pellet hopper are installed on the third platform; the first weighing bucket, the second weighing bucket and the third weighing bucket are installed on the second platform; The powder feeding machine, dispersing kettle and pellet silo are installed on the ground.

Preferably, the soft connection is made of a dustproof cloth or silica gel that is rolled into a cylindrical shape, and both ends of the dustproof cloth or silica gel are provided with hoops or flanges.

Compared with the prior art, the present invention has the following advantages:

(1) the present invention divides the powder into two feedings, the first time a small amount of powder is mixed with the granules, and when reaching the middle of the barrel, the powder and the granules added for the first time have been fully or partially melted at high temperature, Then the powder is added for the second time. The powder can be well mixed with the molten plastic and completely melted at the back of the barrel. Only one production line is needed, which saves electricity and labor costs, and saves the space of the workshop and reduces the cost of production. Cost of production.

(2) The present invention can realize automatic feeding and automatic weighing of powders and granules, reduce the labor intensity of workers, and the dust generated by workers when feeding materials can be collected by the dust collecting hood, and then pumped away by the fan and sent to the dust separator for filtering. After the air is discharged, the dust can be reused. The dust filter can assist the powder hopper to exhaust and filter the dust, which can avoid the dust in the workshop, improve the production environment of the workshop, ensure the health of the workers' respiratory system, reduce the waste of raw materials, and save costs.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

As shown in Figure 1, a dust-free plastic particle production line includes a powder branch, a pellet branch, an extruder and a control unit (a commercial industrial computer or a PLC controller can be purchased).

The powder branch circuit includes a powder feeding machine 2, a dispersion kettle 7, a first powder hopper 16.1, a second powder hopper 16.2, a first weighing device and a second weighing device. There is a feeding port 1 on the front of the powder feeding machine, and workers can pour the bagged powder into the powder feeding machine from the feeding port without climbing. The top of the dust collector is provided with a dust collecting hood 3. The top of the dust collecting hood is connected to the inlet of the fan 18 through a pipe, and the outlet of the fan is connected to the first inlets of the two dust separators respectively through the dust collecting pipes 19 with bifurcated ends. Under the action of the fan, the dust collected by the dust collecting hood is sent to the two dust separators through the dust collecting pipe. The outlet at the bottom of the powder feeding machine is connected to the inlet at the top of the dispersion kettle through the first screw conveyor 6 (existing mature equipment), and the powder input by the workers is fed into the dispersion kettle.

The outlet at the bottom of the dispersion kettle is connected to the second inlet of the two dust separators through a first pneumatic conveyor 9 (existing mature equipment) and a first delivery pipe 10 with a bifurcated end. Two dust separators are respectively arranged on the top of the first powder hopper and the second powder hopper, the outlet at the bottom of the first powder hopper is provided with an electric valve 25 (existing mature equipment), and is connected with the first weighing device through a soft connection 26. The inlet of the first weighing device is connected to the first powder outlet pipe 30.1 through the flexible connection 26. The outlet at the bottom of the second powder hopper is provided with an electric valve 25, and is connected to the inlet of the second weighing device through a soft connection 26, and the outlet of the second weighing device is connected to the second powder outlet pipe 30.2 through the soft connection 26.

The pellet branch includes a pellet bin 23, a pellet hopper 20 and a third weighing device. The outlet at the bottom of the pellet silo is connected to the feed port 21 at the top of the pellet hopper through the second pneumatic conveyor 24 and the second conveying pipe 22. The outlet at the bottom of the pellet hopper is provided with an electric valve 25, and is connected to the third scale through a soft connection 26. The inlet of the weighing device is connected, the outlet of the third weighing device is connected with the granule outlet pipe 30.3 through the soft connection 26, the lower part of the granule outlet pipe is arranged obliquely downward and is connected with the upper section of the second powder outlet pipe 30.2, the second powder outlet pipe 30.2 is connected. The lower section of the pipe forms a mixed discharge pipe 30.4 for powder and granules;

The extruder includes a machine base 31, a barrel 34 installed on the base, an extrusion die 35 installed at the tail of the barrel, and a head 32 installed at the head of the barrel. The barrel has two feeding The first feeding port is located at the head of the barrel and is connected to the mixing discharge pipe 30.4. The second feeding port is located in the middle of the barrel and is connected to the outlet of the screw conveyor 33. The inlet of the screw conveyor is connected to the first The powder outlet pipe 30.1 is connected.

The dust separator includes a powder feed section 11, a filter section 12 and a powder output section 14 which are connected in sequence from top to bottom. The powder feed section is fixedly supported on the first or second powder hopper by a bracket 13, and the For the first and second inlets, the filter section is made of cylindrical filter cloth, which is used to filter dust and discharge air. The bottom of the powder outlet section is connected to the inlet of the top of the first or second powder hopper.

The first, second, and third weighing devices all include an electronic scale 29 (an industrial electronic scale, which can be purchased and not described in detail), a second screw conveyor 28 and a weighing bucket 27. The second screw conveyor is fixedly installed on the electronic scale, the outlet of the second screw conveyor is used as the outlet of the weighing device, the inlet of the second screw conveyor is fixedly connected with the outlet at the bottom of the weighing bucket, and the inlet at the top of the weighing bucket is used as the weighing device. Entrance to heavy equipment.

The tops of the first powder hopper, the second powder hopper, the pellet hopper and the weighing hopper are all provided with auxiliary exhaust ports, and the auxiliary exhaust ports are covered with a dust filter 17 . The dust filter 17 includes a frame arranged around the auxiliary exhaust port, and a dust filter cloth covering the top surface of the frame and the surrounding outer walls.

The dispersion kettle, the first powder hopper, the second powder hopper, the first weighing hopper and the second weighing hopper are all provided with a stirring shaft 4 driven by a motor 8, and a stirring blade 5 is arranged on the stirring shaft. The pellets do not need to be stirred, so the pellet hopper and the third weighing hopper do not have stirring blades.

The first powder hopper, the second powder hopper and the granular hopper are installed on the third platform 15.1; the first weighing bucket, the second weighing bucket and the third weighing bucket are installed on the second platform 15.2; The powder machine, dispersing kettle and pellet silo are installed on the ground. Using the gravity of the powder and granules, it enters each weighing hopper from each powder hopper and granule hopper, and then enters each powder outlet and granule outlet.

The soft connection is made of a dustproof cloth or silica gel that is curled into a cylindrical shape, and both ends of the dustproof cloth or silica gel are provided with hoops or flanges for connection. Generally, the axial length of the dustproof cloth and the silica gel is greater than the distance to be connected, so a relative displacement can be generated between the two connected parts without affecting the connection part.

The machine head, fan, screw conveyors, pneumatic conveyors, motors, electric valves and electronic scales are all electrically connected to and controlled by the control unit. The amount of raw materials in the powder discharge pipe, the powder branch pipe and the granular material branch pipe is determined according to needs, and can be specifically controlled by the first, second and third weighing devices. In the actual production process, 50% by weight of pellets and 30% by weight of powder are added for the first time, and 20% by weight of powder is added for the second time, and the quality of the produced plastic particles meets the requirements.

The working principle of the invention is as follows: under the action of the negative pressure of the fan, the dust is collected in the dust collecting hood, and sent to the dust separator through the dust collecting pipe, the air is discharged from the mesh of the filter cloth, and the dust is removed by the filter cloth under the action of the filter cloth. Leave it, collect it into the powder discharge section, and then enter the first powder hopper or the second powder hopper; the powder is sent to the dispersing kettle through the first screw conveyor for dispersion, and then sent to the two dust separators through the first pneumatic conveyor , after the air is separated, it enters the first powder hopper or the second powder hopper, and mixes with the recovered powder evenly. The dust generated during stirring and the air not discharged by the filter cloth in time can be filtered and assisted by the dust filter;

After the pellets are sent to the pellet hopper through the second pneumatic conveyor, the air is discharged from the dust filter, and the pellets are stored in the pellet hopper;

The openings of each electric valve are opened. According to the pre-set amount of powder in the extruder, the powder enters the weighing hoppers of the first weighing device and the second weighing device, and the pellets enter the weighing hopper of the third weighing device. The powder and pellets are weighed separately by the electronic scale. When the predetermined weight is reached, the electric valves are closed, and the second screw conveyors are opened, and the powder in the weighing hopper connected to the second powder hopper 16.2 is sent to the second powder hopper 16.2. The powder outlet pipe 30.2 sends the pellets in the weighing hopper connected to the pellet hopper 20 to the pellet outlet pipe 30.3, the powder material and the pellets enter the mixing outlet pipe 30.4 for the first feeding, and the first powder hopper 16.1 is docked The powder in the weighing hopper is sent to the first powder outlet pipe 30.1 for secondary feeding, and finally the plastic particles are extruded from the extrusion die.

It should be noted that since the inlet and outlet of the weighing device are both set with soft connections, which is equivalent to isolating the electronic scale from the rest of the components, the weight change from the electronic scale is the weight of the powder or pellets in the weighing hopper. .

The above descriptions are only preferred embodiments of the present invention, and for those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. a kind of dustless plastic pellet production line, it is characterised in that: including powder branch, pellet branch and extruding machine, wherein

The powder branch includes starching machine (2), Scattered Kettle (7), the first powder bucket (16.1), the second powder bucket (16.2), One weighing device and the second weighing device；The front of starching machine is formed with feeding port (1), and top is provided with dust gathering arrester (3), dust The top of cover is connect by pipeline with blower (18) entrance, and fan outlet is separately connected two dust separations by dust leg (19) The outlet of the first entrance of device, starching machine bottom is connected to the entrance at the top of Scattered Kettle by the first screw conveyor (6), disperses The outlet in bottom portion is connected to the second of two dust separators and is entered by the first pneumatic conveyer (9) and the first delivery pipe (10) Mouthful；Two dust separators are separately positioned on the top of the first powder bucket and the second powder bucket, the outlet of the first powder bucket bottom It is connect by being flexible coupling (26) with the entrance of the first weighing device, the outlet of the first weighing device is by being flexible coupling (26) and first Flour extraction pipe (30.1) connection, the outlet of the second powder bucket bottom by be flexible coupling (26) connect with the entrance of the second weighing device, The outlet of second weighing device by be flexible coupling (26) connect with the second flour extraction pipe (30.2)；

The pellet branch includes pellet storehouse (23), pellet bucket (20) and third weighing device, and the outlet of grain bin bottom is logical It crosses the second pneumatic conveyer (24) and the second delivery pipe (22) is connected to feed inlet (21) at the top of pellet bucket, grain feed hopper bottom Outlet by be flexible coupling (26) connect with the entrance of third weighing device, the outlet of third weighing device pass through be flexible coupling (26) and Grain pipe (30.3) connects out, and the lower part of grain pipe (30.3) is arranged obliquely and connect with the upper section of the second flour extraction pipe (30.2) out Logical, the lower section of the second flour extraction pipe (30.2) forms the mixing discharge nozzle (30.4) of powder and pellet；

The extruding machine includes base (31), installation machine barrel (34) on the base, the press molds for being mounted on machine barrel tail portion (35), and it is mounted on the head (32) of barrel head, for machine barrel tool there are two feeding port, first feeding port is located at barrel head Portion is connect with mixing discharge nozzle (30.4), and second feeding port is located in the middle part of machine barrel, and the outlet with screw conveyor (33) connects It connects, the entrance of screw conveyor is connect with the first flour extraction pipe (30.1).

2. the dustless plastic pellet production line of one kind according to claim 1, it is characterised in that: the dust separator packet Include it is sequentially connected into powder section (11), fillter section (12) and powder section (14) out from top to bottom, it is fixed by bracket (13) into powder section It is supported on first or second powder bucket, and is formed with first, second entrance, fillter section is fabric using cylindric filtering Make, for filtering dust and discharge air, the bottom of flour extraction end is connect with the entrance at the top of first or second powder bucket.

3. the dustless plastic pellet production line of one kind according to claim 1, it is characterised in that: described first, second, Three weighing devices include an electronic scale (29), second screw conveyor (28) and a weighing hopper (27), and second Screw conveyor is fixedly mounted on electronic scale, outlet of the outlet of the second screw conveyor as weighing device, the second spiral The entrance of conveyer is fixedly connected with the outlet of weighing hopper bottom, entrance of the entrance at the top of weighing hopper as weighing device.

4. the dustless plastic pellet production line of one kind according to claim 3, it is characterised in that: first powder bucket, Being respectively provided at the top of second powder bucket, pellet bucket and weighing hopper has auxiliary exhaust mouth, which is stamped powder Dirt filter (17).

5. the dustless plastic pellet production line of one kind according to claim 4, it is characterised in that: the dust filter unit packet The skeleton around the setting of auxiliary exhaust mouth is included, and is coated on the dust filter cloth of skeleton top surface and surrounding outer wall.

6. according to the dustless plastic pellet production line of one kind described in claim 3 or 4 or 5, it is characterised in that: the dispersion Kettle, the first powder bucket, the second powder bucket, the first weighing hopper and the second weighing hopper are provided with the agitating shaft driven by motor (8) (4), stirring blade (5) are provided on agitating shaft.

7. the dustless plastic pellet production line of one kind according to claim 1, it is characterised in that: first powder bucket, The outlet of second powder bucket and grain feed hopper bottom is respectively arranged with electrically operated valve (25).

8. the dustless plastic pellet production line of one kind according to claim 1, it is characterised in that: first powder bucket, Second powder bucket and pellet bucket are mounted on third layer platform (15.1)；First weighing hopper, the second weighing hopper and third claim Bucket is mounted on second layer platform (15.2) again；Starching machine, Scattered Kettle and the installation of pellet storehouse are on the ground.

9. the dustless plastic pellet production line of one kind according to claim 1, it is characterised in that: described to be flexible coupling using volume At cylindric dustcloth, perhaps anchor ear or flange is arranged in the both ends of silica gel production dustcloth or silica gel to song.