CN109605715B

CN109605715B - Automatic production system of CPE blown film

Info

Publication number: CN109605715B
Application number: CN201811368366.9A
Authority: CN
Inventors: 曹玉; 毛潞
Original assignee: Chongqing Ruiting Plastic Co Ltd
Current assignee: Chongqing Ruiting Plastic Co Ltd
Priority date: 2018-11-16
Filing date: 2018-11-16
Publication date: 2020-10-27
Anticipated expiration: 2038-11-16
Also published as: CN109605715A

Abstract

The invention relates to the field of blown film production equipment, and discloses an automatic production system of a CPE blown film, which comprises a mixing unit, a feeding unit and an extrusion blow molding unit, wherein the mixing unit comprises a mixing barrel and a plurality of raw material boxes, the tank tower, baffle and rabbling mechanism, the tank tower includes centre frame and a plurality of curb plate, a plurality of curb plate circumference are fixed on the centre frame, the shape of former feed bin is the same with the space shape between two adjacent curb plates, a plurality of former feed bins all can dismantle the connection between two adjacent curb plates, be equipped with the detachable connection spare of a plurality of vertical range between former feed bin and the curb plate, a plurality of former feed bins have seted up the discharge gate on the lateral wall of centre frame towards, the centre frame is fixed in compounding section of thick bamboo upper end, discharge gate and compounding section of thick bamboo intercommunication, sliding connection has the baffle on the tank tower, the feed inlet can be sealed to the baffle, compounding section of thick bamboo bottom is equipped with. The scheme solves the problem that the raw materials loaded in a unit time in the loading process have different component proportions.

Description

Automatic production system of CPE blown film

Technical Field

The invention relates to the field of blown film production equipment, in particular to an automatic production system of a CPE blown film.

Background

The CPE film is an unstretched oxidized polyethylene film prepared by a tape casting method, has the characteristics of light weight, high transparency, strong mechanical adaptability, moisture resistance and the like, and is widely applied to the field of packaging. The production process of the CPE film comprises the steps of batching, mixing, extrusion blow molding, cooling, corona, slitting and the like, wherein the batching and cooling have important influence on the performance of the CPE film. The CPE blown film is produced by proportioning and uniformly mixing a plurality of raw material particles. Traditional granule mixes is poured into the mixing hopper with different kind's granule in, then the workman stirs with the shovel, and this mode intensity of labour is big, and efficiency is lower, is unfavorable for large-scale industrial use.

The patent document with the Chinese publication number of CN206812260U discloses a stirring and feeding device for plastic processing, which comprises a feeding tank, wherein the feeding tank is provided with a feeding hole, a feeding hopper, a rotating shaft, a rotating disc, a stirring shaft, a stirring net blade, an air pump, a dust collection cover and a material guide channel; a support rod, a traveling wheel and a motor are arranged below the charging bucket; the right wall of the charging bucket is provided with a dust removal box, and a connecting air pipe, a one-way valve and an exhaust pipe are arranged in the dust removal box; the right side of the feeding tank is provided with a processing device, and the left side of the processing device is provided with a processing feed inlet. Above-mentioned scheme is passed through the (mixing) shaft device raise the ash and the ejection of compact, carries out the dust filtration through air pump cooperation dust cage dust absorption and through the dust removal box and concentrates.

According to the scheme, a certain amount of raw materials are required to be manually mixed before each feeding, and the stirring is easily uneven under the condition that the raw materials are more.

Disclosure of Invention

The invention aims to provide an automatic production system of a CPE blown film, which aims to solve the problem that the proportions of all components of raw materials fed in a unit time in a feeding process are different.

In order to achieve the above object, the basic scheme of the invention is as follows:

the automatic production system of the CPE blown film comprises a mixing unit, a feeding unit and an extrusion blow molding unit, wherein the mixing unit, the feeding unit and the extrusion blow molding unit are sequentially connected, the mixing unit comprises a mixing barrel, a plurality of raw material boxes, a box frame, a baffle plate and a stirring mechanism, the box frame comprises a central frame and a plurality of side plates, the plurality of side plates are circumferentially fixed on the central frame, the shape of each raw material box is the same as the shape of a space between two adjacent side plates, the plurality of raw material boxes can be detachably connected between the two adjacent side plates, a plurality of vertically arranged detachable connecting pieces are arranged between the raw material boxes and the side plates, a discharge port is formed in the side wall of each raw material box facing the central frame, the central frame is fixed at the upper end of the mixing barrel, the discharge port is communicated with the mixing barrel, the box frame is slidably connected with the baffle plate, the bottom of the mixing barrel is provided with a discharge hole, and the feeding unit is connected with the discharge hole.

The beneficial effects of the basic scheme are as follows: (1) be provided with a plurality of former feed tanks in the compounding unit of this scheme to through adjusting single former feed tank and fixing the former feed tank at different heights through the detachable connection piece of co-altitude, thereby make the discharge gate on the former feed tank be located co-altitude, when the baffle shifts up, the area that the discharge gate of each former feed tank exposes is different, thereby realize the ejection of compact to the different volume of each raw materials, thereby accomplish the batching voluntarily, the artifical batching step among the prior art has been saved, time and manpower have been practiced thrift.

(2) Because the size of multiple raw material particles is different, in the stirring process, the raw material particles with small diameters can fall down from gaps among the raw material particles with large diameters, so that the particles with small diameters are easily gathered at the bottom, and the raw material components fed in unit time are different in proportion in the feeding process, thereby seriously affecting the quality of the film. This scheme can last or the spaced feeds a compounding section of thick bamboo when realizing automatic blending, when guaranteeing that the material loading lasts going on, make the raw materials volume in the compounding section of thick bamboo less, raw materials weight is less on the one hand, the stirring of being convenient for, on the other hand has avoided the raw materials in the compounding section of thick bamboo too much, lead to the less raw materials granule gathering of diameter in the bottom, cause the uneven problem of stirring, thereby make each component proportion of raw materials of material loading the same in the unit interval, guarantee the quality of film.

Further, rabbling mechanism includes motor, pivot and a plurality of stirring rake, the motor is fixed outside the compounding section of thick bamboo, the pivot is fixed on the output shaft of motor, just the pivot is connected with the rotation of compounding section of thick bamboo, and is a plurality of stirring rake circumference is fixed in the pivot. When the mixer is started, the motor is started, the output shaft of the motor rotates to drive the rotating shaft to rotate, and the stirring paddle rotates along with the rotating shaft, so that raw materials in the mixing barrel are stirred.

Further, the motor is fixed at the lower end of the mixing barrel, a plurality of top plates are hinged to the top end of the rotating shaft, torsion springs are fixed between the top plates and the rotating shaft, the top plates abut against the baffle plates, and when the rotating shaft rotates, the baffle plates seal all the discharge holes.

When the rotating shaft rotates, the top plate rotates along with the rotating shaft, the top plate overturns downwards under the action of centrifugal force, and the baffle is located at the lowest position and blocks all the discharge holes. When pivot stall, roof stall, under the effect of the elastic recovery power of torsional spring, the roof upset upwards, because the roof upset, the top of roof highly shifts up, because roof and baffle offset, the top of roof shifts up, promotes the baffle and shifts up to make the baffle expose the discharge gate.

Furthermore, a plurality of the curb plate both sides are equipped with the arch of a plurality of vertical ranges, and a plurality of be equipped with the recess that matches with the arch on the lateral wall of raw material tank and curb plate contact, arch can sliding connection in the recess. According to the composition proportion of the raw materials in the raw material box, with the protruding and the not recess cooperation of co-altitude on a plurality of raw material box for each raw material box is fixed at co-altitude, thereby makes the feed inlet of each raw material box be located co-altitude.

Further, a mixing brush is fixed on the rotating shaft and is positioned at the bottom of the mixing barrel. In the process of rotating the rotating shaft, the mixing brush rotates along with the rotating shaft to stir the raw materials at the bottom of the mixing barrel, so that the raw materials in the mixing barrel are uniformly stirred, and the raw materials can be prevented from being accumulated at the bottom of the mixing barrel and cannot be discharged from the discharge hole.

Drawings

Fig. 1 is a schematic structural diagram of a feeding unit in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a box rack according to an embodiment of the present invention;

FIG. 3 is a schematic view showing a detailed structure of a raw material tank according to an embodiment of the present invention;

FIG. 4 is a schematic view of the engagement of the material box with the box holder according to an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: mixing barrel 1, box frame 2, centre frame 3, curb plate 4, raw materials box 5, feed inlet 6, discharge gate 7, arch 8, recess 9, baffle 10, torsional spring 11, roof 12, motor 13, pivot 14, stirring rake 15, compounding brush 16, drain hole 17, frame 18.

Examples

Substantially as shown in figure 1: the automatic production system of CPE blown film, including compounding unit, material loading unit and extrusion blow molding unit, compounding unit, material loading unit and extrusion blow molding unit connect gradually. The CPE film is composed of the following raw materials in percentage by mass: an aluminum box: plasticizer: thermal stabilizer: oxidized paraffin wax: antimony trioxide: the aramid fiber is 8:1:3:1:1: 1.

Referring to fig. 2, 3 and 4, the mixing unit includes a frame 18, a mixing drum 1, seven raw material tanks 5, a tank frame 2, a baffle 10 and a stirring mechanism, wherein the mixing drum 1 is fixed on the frame 18 through bolts. The box frame 2 comprises a central frame 3 and seven side plates 4, wherein the seven side plates 4 are circumferentially and equidistantly fixed on the central frame 3, and the side plates 4 and the central frame 3 are integrally formed. The shape of raw material tank 5 is the same with the space shape between two adjacent curb plates 4, and a plurality of raw material tanks 5 all can dismantle the connection between two adjacent curb plates 4, and every 4 both sides of curb plate all are equipped with eight vertical archs 8 of arranging, all offer the recess 9 that matches with protruding 8 on the lateral wall of every raw material tank 5 and the contact of curb plate 4, and protruding 8 can sliding connection in recess 9. Discharge gate 7 has all been seted up towards the lateral wall lower part of centre frame 3 to every raw material tank 5, and feed inlet 6 has all been seted up to the roof of every raw material tank 5. The centre frame 3 passes through the bolt fastening in 1 upper ends of mixing barrel, and discharge gate 7 and mixing barrel 1 intercommunication, sliding connection have baffle 10 on the tank tower 2, and baffle 10 can seal feed inlet 6, and 1 bottom of mixing barrel is equipped with drain 17, and the material loading unit is connected with drain 17. The stirring mechanism comprises a motor 13, a rotating shaft 14 and twelve stirring paddles 15 (not all shown in the figure), the motor 13 is fixed at the lower end of the mixing barrel 1 through bolts, the rotating shaft 14 is fixed on an output shaft of the motor 13 through splines, and the rotating shaft 14 is rotatably connected with the mixing barrel 1 through a bearing. The stirring paddle 15 is fixed on the rotating shaft 14 through bolts in the circumferential direction. Four top plates 12 are hinged to the top end of the rotating shaft 14, a torsion spring 11 is bonded between each top plate 12 and the rotating shaft 14, and the top plates 12 are abutted to the baffle plates 10. A mixing brush 16 is fixed on the rotating shaft 14, and the mixing brush 16 is positioned at the bottom of the mixing barrel 1.

The feeding unit comprises a storage bin, a feeding pipe and a negative pressure fan, the storage bin is communicated with a discharging hole 17, a valve is fixed at the discharging hole 17, the feeding pipe is fixed at the upper part of the storage bin, and the negative pressure fan is fixed in the feeding pipe.

The extrusion blow molding unit includes a high-temperature melting chamber and an extrusion blow molding machine (in the present embodiment, a film blowing machine disclosed in patent document No. CN108422648A is selected) which are communicated with each other, and the high-temperature melting chamber is communicated with the feeding pipe.

The specific implementation process is as follows: seven raw material boxes 5 are fixed at different heights according to the raw material proportion, for example, the lowest groove 9 of the raw material box 5 with the raw material mass ratio of 8 is matched with the lowest bulge 8, and the lowest groove 9 of the raw material box 5 with the raw material mass ratio of 1 is matched with the highest bulge 8. At this moment, the operator starts the motor 13, the motor 13 drives the rotating shaft 14 to rotate, the top plate 12 rotates along with the rotating shaft 14, under the action of centrifugal force, the top plate 12 turns downwards, the baffle plate 10 loses the support of the top plate 12, and moves downwards and blocks all the discharge holes 7 under the action of gravity. The raw materials of each component are put into the corresponding raw material box 5 through the feed inlet 6. When the materials are required to be discharged into the mixing barrel 1, an operator turns off the motor 13, the rotating shaft 14 stops rotating, the top plate 12 loses centrifugal force, and under the elastic acting force of the torsion spring 11, the top plate 12 turns upwards to push the baffle plate 10 upwards. The baffle 10 moves upwards, each discharge hole 7 is exposed, and the areas of the discharge holes 7 which move upwards and fall out of the baffle 10 are different due to the different heights of the discharge holes 7, so that the raw materials automatically enter the mixing barrel 1 in proportion.

When enough raw materials are put into the mixing cylinder 1, the motor 13 is controlled by an operator to be started again, the raw materials in the mixing cylinder 1 are stirred by the stirring paddle 15 and the mixing brush 16, the valve is opened after the raw materials in the mixing cylinder 1 are stirred for a period of time, the uniformly stirred raw materials in the mixing cylinder 1 enter the storage bin through the discharge hole 17, then enter the high-temperature melting cavity through the feeding pipe under the action of negative pressure, and finally the raw materials are made into a film by the extrusion blow molding machine. After all the raw materials in the mixing cylinder 1 are discharged, the motor 13 is turned off again, so that the raw materials in the raw material box 5 are proportionally fed into the mixing cylinder 1.

The foregoing is merely an example of the present invention and common general knowledge in the art of specific structures and/or features of the invention has not been set forth herein in any way. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

The automated production system of CPE blown film, including compounding unit, material loading unit and extrusion blow molding unit, compounding unit, material loading unit and extrusion blow molding unit connect gradually its characterized in that: the mixing unit comprises a mixing barrel, a plurality of raw material boxes, a box frame, a baffle and a stirring mechanism, wherein the box frame comprises a central frame and a plurality of side plates, the side plates are circumferentially fixed on the central frame, the shape of each raw material box is the same as the shape of a space between two adjacent side plates, the raw material boxes can be detachably connected between the two adjacent side plates, a plurality of vertically-arranged detachable connecting pieces are arranged between the raw material boxes and the side plates, a discharge hole is formed in the side wall, facing the central frame, of each raw material box, the central frame is fixed at the upper end of the mixing barrel, the discharge hole is communicated with the mixing barrel, the baffle is connected onto the box frame in a sliding manner, the baffle can seal the feed hole, a discharge hole is formed in the bottom of the mixing barrel, and the;

the stirring mechanism comprises a motor, a rotating shaft and a plurality of stirring paddles, the motor is fixed outside the mixing barrel, the rotating shaft is fixed on an output shaft of the motor, the rotating shaft is rotatably connected with the mixing barrel, and the plurality of stirring paddles are circumferentially fixed on the rotating shaft;

the motor is fixed at the lower end of the mixing barrel, a plurality of top plates are hinged to the top end of the rotating shaft, torsion springs are fixed between the top plates and the rotating shaft, the top plates are abutted to the baffle plates, and when the rotating shaft rotates, the baffle plates seal all the discharge holes.
2. The automated CPE blown film production system of claim 1, wherein: a plurality of the lateral plate both sides are equipped with the arch of a plurality of vertical range, and a plurality of be equipped with the recess that matches with the arch on the lateral wall of raw material tank and lateral plate contact, arch can sliding connection in the recess.
3. The automated CPE blown film production system of claim 2, wherein: a mixing brush is fixed on the rotating shaft and is positioned at the bottom of the mixing barrel.