CN-122006563-A - Preparation device and production method of efficient composite PVC stabilizer

CN122006563ACN 122006563 ACN122006563 ACN 122006563ACN-122006563-A

Abstract

The invention discloses a preparation device and a production method of a high-efficiency composite PVC stabilizer, relates to the technical field of PVC stabilizer production, and solves the problems of low batching precision, uneven mixing, poor molding, raw material waste, low automation and the like in the prior art. The device comprises a frame, wherein raw material pretreatment, precise batching, efficient mixing, powder homogenization forming, crushing and screening, and finished product collecting units are arranged on the frame, each unit is communicated with a conveying mechanism and is electrically connected with a central control system, unqualified materials flow back to the efficient mixing unit, and the production method comprises raw material pretreatment, precise batching, triple efficient mixing, homogenization forming, crushing and screening, and finished product packaging to obtain the finished product. The invention realizes the automatic and accurate control of the whole process of PVC stabilizer production, improves the uniformity of product mixing and the consistency of quality, effectively inhibits the thermal degradation of PVC processing, has high raw material utilization rate, excellent production efficiency and compact equipment, is suitable for large-scale production, and is suitable for the pure physical mixing production of the composite PVC powder stabilizer.

Inventors

XU CHEN
WANG ZHIYONG
ZHANG TING
LIU JINTAO
FANG JIAN

Assignees

黄山佳宝新材料科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (5)

1. The preparation device of the efficient composite PVC stabilizer is characterized by comprising a rack, wherein a raw material pretreatment unit, an accurate batching unit, an efficient mixing unit, a powder homogenizing and forming unit, a crushing and screening unit and a finished product collecting unit are sequentially arranged on the rack, the units are sequentially communicated through a conveying mechanism, and the units are electrically connected with a central control system; the raw material pretreatment unit comprises a pretreatment tank, wherein a stirring assembly and a drying assembly are arranged in the pretreatment tank, a feed inlet is formed in the top of the pretreatment tank, a discharge outlet is formed in the bottom of the pretreatment tank, a first electromagnetic valve is arranged at the discharge outlet, and a humidity sensor is arranged on the inner wall of the pretreatment tank and is electrically connected with a central control system; The accurate batching unit comprises a plurality of batching bins, a quantitative conveying mechanism is arranged at the bottom of each batching bin, the quantitative conveying mechanism comprises a screw conveyor and a weight sensor, the discharge end of the screw conveyor is communicated with the feed end of the efficient mixing unit, the weight sensor is arranged at the discharge port of the screw conveyor, and the screw conveyor and the weight sensor are electrically connected with the central control system; The high-efficiency mixing unit comprises a sealed mixing tank, the sealed mixing tank body is of a tank body structure which is vertically arranged, a mixing feed port is arranged at the top of the sealed mixing tank body, a mixing discharge port is arranged at the bottom of the sealed mixing tank body, the mixing feed port is communicated with the discharge end of the quantitative conveying mechanism, and the mixing discharge port is communicated with the powder homogenizing forming unit; the device comprises a sealed mixing tank, a stirring motor, a stirring shaft, a stirring paddle, a powder circulating port, a vibrating motor, a powder pump, a powder nozzle and a stirring motor, wherein the mechanical stirring assembly is arranged inside the sealed mixing tank and comprises the stirring motor, the stirring shaft and the stirring paddle; the powder homogenizing and forming unit comprises a homogenizing bin, a spiral forming machine and a low-temperature air curtain component, wherein the homogenizing bin is arranged below a mixing discharge end of the efficient mixing unit, a low-speed stirring paddle is arranged in the homogenizing bin, the bottom of the homogenizing bin is communicated with a feed end of the spiral forming machine, the low-temperature air curtain component is arranged at the discharge end of the spiral forming machine in a surrounding manner, and the stirring component of the homogenizing bin, the spiral forming machine and the low-temperature air curtain component are all electrically connected with the central control system; The crushing and screening unit comprises a crusher and a screening machine, wherein the feeding end of the crusher is communicated with the discharging end of the spiral forming machine of the powder homogenizing and forming unit, the discharging end of the crusher is communicated with the feeding end of the screening machine, a grading screen is arranged in the screening machine, the bottom of the screening machine is provided with a qualified discharging port and a disqualified discharging port, and the disqualified discharging port is communicated with the mixing feeding port of the efficient mixing unit through a return pipe; The finished product collecting unit comprises a finished product bin and a packaging machine, wherein the feeding end of the finished product bin is communicated with the qualified discharging port of the screening machine, the discharging end of the finished product bin is connected with the packaging machine, and the packaging machine is provided with a weight metering assembly.
2. The device for preparing the efficient composite PVC stabilizer according to claim 1, wherein the stirring assembly of the pretreatment tank comprises a pretreatment motor, a pretreatment stirring shaft and a pretreatment stirring paddle, the pretreatment motor is fixed at the top of the pretreatment tank, the pretreatment stirring shaft penetrates through the top of the pretreatment tank and is connected with the output end of the pretreatment motor, the pretreatment stirring paddle is fixed on the pretreatment stirring shaft, and a plurality of dispersing teeth are arranged on the pretreatment stirring paddle.
3. The preparation device of the efficient composite PVC stabilizer according to claim 1, wherein the number of the proportioning bins is 4-8, and a sealing cover is arranged at the top of each proportioning bin.
4. The device for preparing the efficient composite PVC stabilizer according to claim 1, wherein the central control system comprises a PLC and a touch control operation screen, and the PLC is respectively and electrically connected with a motor, a sensor, an electromagnetic valve, a heating assembly, a powder pump, a conveying mechanism and a low-temperature air curtain assembly of each unit.
5. A method for producing a high-efficiency composite PVC stabilizer based on the preparation device as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps: Step S1, raw material pretreatment, namely respectively throwing all raw materials of a composite PVC powder stabilizer into a pretreatment tank from a feed inlet of the pretreatment tank, starting a stirring assembly and a drying assembly of the pretreatment tank by a central control system, heating and drying the raw materials in the pretreatment tank by a heating sleeve, stirring and dispersing the raw materials by a stirring paddle with a dispersing tooth of the stirring assembly, detecting the humidity of the raw materials in the tank in real time by a humidity sensor, closing the drying assembly by the central control system when the humidity reaches a preset threshold value, stopping stirring for 1-3min by the stirring assembly, opening a first electromagnetic valve, and conveying the pretreated raw materials into a proportioning bin corresponding to an accurate proportioning unit through a discharge hole; S2, accurately batching, namely respectively starting a central control system at the bottom of each batching bin according to the preset compound PVC stabilizer formula proportion, respectively starting a quantitative conveying mechanism at the bottom of each batching bin according to the preset compound PVC powder stabilizer formula proportion, quantitatively conveying the pretreated raw materials in the batching bin by a screw conveyor, detecting the weight of the conveyed raw materials in real time by a weight sensor, closing the corresponding screw conveyor by the central control system when the preset weight of the formula is reached, completing the accurate batching of each raw material, and conveying the batched raw materials into a sealed mixing tank of a high-efficiency mixing unit; S3, high-efficiency mixing, namely after the raw materials enter a sealed mixing tank, starting a stirring motor by a central control system, driving a stirring shaft and a stirring paddle to mechanically stir the raw materials in the tank, simultaneously starting a vibrating motor to perform vibration dispersion on the sealed mixing tank, starting a powder pump, conveying powder at the lower part of the sealed mixing tank to a powder nozzle through a powder circulating port and a sealing pipe, spraying the powder into a mixing feed port by the powder nozzle at high pressure, forming circulating mixing with the new raw materials, and continuing the mixing process for 10-20min until the raw materials are uniformly mixed, and conveying the mixed powder raw materials to a homogenizing bin of a powder homogenizing and forming unit; Step S4, powder homogenizing and forming, namely after the powder raw material enters a homogenizing bin, starting a low-speed stirring paddle by a central control system to perform low-speed homogenizing and stirring, then, enabling the powder raw material to enter a spiral forming machine to be extruded into strip/granular loose solids, starting a low-temperature air curtain assembly to perform surface shaping on the formed solids, and conveying the shaped powder formed materials to a crushing and screening unit; S5, crushing and screening, namely conveying the shaped powder forming material to a crusher for crushing, conveying the crushed material to a screening machine for screening through a grading screen, conveying qualified materials with the particle size meeting preset standards to a finished product collecting unit, and conveying unqualified materials with the particle size not meeting the standards back to a high-efficiency mixing unit for remixing through a return pipe; And S6, collecting and packaging finished products, namely temporarily storing qualified materials in a finished product warehouse, conveying the qualified materials to a packaging machine through a discharge end of the finished product warehouse, and quantitatively metering the materials by a weight metering assembly on the packaging machine to finish finished product packaging of the composite PVC powder stabilizer.

Description

Preparation device and production method of efficient composite PVC stabilizer Technical Field The invention belongs to the technical field of PVC stabilizer production, and particularly relates to a preparation device and a production method of a high-efficiency composite PVC stabilizer. Background Polyvinyl chloride (PVC) is widely used in various fields such as industrial and agricultural production, building materials, daily necessities, etc., due to its excellent processability, high mechanical strength, corrosion resistance, good insulation, flame retardancy, etc. However, the PVC molecular chain has structural defects such as allyl chloride, the conventional processing temperature is above 170 ℃, HCl removal reaction is easy to occur in a high-temperature environment, and further 'zipper' -type linkage degradation is initiated, so that the phenomena of yellowing, blackening and the like of the PVC product are caused, and the appearance quality, mechanical property and service life of the product are seriously reduced. In order to inhibit thermal degradation reaction in the PVC processing process, a PVC stabilizer needs to be added in a processing link, and the composite PVC powder stabilizer becomes a mainstream choice due to excellent comprehensive performance and adaptation to a powder processing technology. The existing production device and method of the composite PVC powder stabilizer have the defects that the raw material pretreatment lacks accurate humidity control, raw material agglomeration is easy to cause to influence the subsequent mixing effect, the material proportioning links are mostly manual or semi-automatic operation, the proportioning precision is low, the consistency of product quality is difficult to ensure, the raw material mixing mode is single, the mixing uniformity is poor, the using effect of the stabilizer is influenced, the powder is easy to agglomerate and scatter after being physically mixed, the adaptive homogenization shaping links are lacking, the subsequent crushing and screening efficiency is influenced, the unqualified materials after crushing and screening cannot be recycled, the raw material waste is caused, the whole production process is low in automation degree, the procedures are not smooth, and the production efficiency is low. Aiming at the technical problems, the invention designs an integrated and automatic efficient composite PVC powder stabilizer preparation device, and is matched with a standardized production method, so that the whole flow of raw material pretreatment, material proportioning, mixing, homogenization forming, crushing and screening and finished product collection is accurately controlled, and the powder pure physical mixing process is adapted, thereby effectively improving the product quality and production efficiency and reducing the raw material loss. Disclosure of Invention The invention aims to provide a preparation device and a production method of a high-efficiency composite PVC stabilizer, which solve the problems of low batching precision, uneven mixing, poor powder forming effect, raw material waste, low automation degree and the like in the prior art and are suitable for the production practice of pure physical mixing of the powder stabilizer. In order to solve the technical problems, the invention is realized by the following technical scheme: The invention discloses a preparation device of a high-efficiency composite PVC stabilizer, which comprises a rack, wherein a raw material pretreatment unit, an accurate batching unit, a high-efficiency mixing unit, a powder homogenizing and forming unit, a crushing and screening unit and a finished product collecting unit are sequentially arranged on the rack along the production flow, the units are sequentially communicated through a conveying mechanism, all the units are electrically connected with a central control system, the full-flow automatic control is realized, and the specific structure of each unit is as follows: The raw material pretreatment unit comprises a pretreatment tank, wherein a feed inlet is formed in the top of the pretreatment tank, a discharge outlet with a first electromagnetic valve is formed in the bottom of the pretreatment tank, a humidity sensor is arranged on the inner wall of the tank, a stirring assembly is arranged in the tank, a drying assembly is arranged on the outer wall of the tank in a surrounding mode, the stirring assembly comprises a pretreatment motor, a pretreatment stirring shaft and a pretreatment stirring paddle with a plurality of dispersing teeth, the pretreatment motor drives the pretreatment stirring shaft to drive the stirring paddle to rotate, the drying assembly is a heating sleeve, and the humidity sensor is electrically connected with a central control system to realize accurate detection and drying control of raw material humidity. The accurate batching unit comprises 4-8 batching bins with sealing covers at the tops, wherein a