CN110142943B - Preimpregnation side feeding device and method - Google Patents
Preimpregnation side feeding device and method Download PDFInfo
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- CN110142943B CN110142943B CN201910467855.8A CN201910467855A CN110142943B CN 110142943 B CN110142943 B CN 110142943B CN 201910467855 A CN201910467855 A CN 201910467855A CN 110142943 B CN110142943 B CN 110142943B
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- 238000010438 heat treatment Methods 0.000 claims description 39
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
- B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fillers or of fibrous materials, e.g. short-fibre reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a pre-impregnation side feeding device and method, the device comprises an extruder body, a pre-impregnation side feeding device and a pre-impregnation side feeding device, wherein the extruder body is provided with a host machine barrel, and the host machine barrel is configured to be mixed, melted, conveyed and extruded after materials are added; the device comprises a material guiding device and a side feeding device, wherein the material guiding device is configured to guide out molten materials from a machine barrel of a host machine and then convey the molten materials into the side feeding device, and the side feeding device is configured to enable the materials added by a charging hole of the side feeding device to be pre-mixed with the molten materials led in from the material guiding device in the side feeding device and then input into the machine barrel of the host machine. The side feeding screw can weaken the influence of the side feeding screw on the side feeding materials, is beneficial to realizing the side feeding of high components of the materials such as powder, glass fiber and the like, and reduces the compression and shearing actions of the feeding screw on the materials. And the water in the side feeding materials is forced to be discharged through the feed inlet or the exhaust hole of the side feeding device in advance, so that the mixing effect of the materials in the processing process after the subsequent side feeding materials enter the machine barrel of the host machine is ensured, the side feeding problem is solved, and the quality of products is improved.
Description
Technical Field
The invention relates to the field of high polymer material preparation facilities and processes, in particular to a pre-impregnation side feeding device and method.
Background
In order to meet different product requirements, the polymer materials often need to be modified by adding components such as fillers, reinforcements, flame retardants and the like, and the modified plastics are prepared by mixing the materials in the formula, and then carrying out melt mixing, extrusion granulation and the like through equipment such as a screw extruder and the like.
The high-proportion filling powder (or part of powder), glass fiber, flame retardant and the like are generally forced to be added in a side feeding mode, so that the influence of layering of premixed materials on the product quality and the influence of accumulation of a charging port of an extruder, blockage of a host machine or influence on the product performance and the like caused by main feeding and discharging are avoided. However, the conventional side feeding device is only simple and forced feeding, and when materials such as flocculent powder, ultrafine powder, glass beads, short glass fibers and the like (such as whisker, wollastonite, talcum powder, titanium pigment, calcium carbonate, short glass fibers, carbon fibers, glass beads and the like) are adopted for production, the problems of unsmooth feeding and reduced feeding capacity exist in a side feeding mode, the proportion requirement cannot be met, and the problem is more remarkable when the side feeding is carried out at a higher proportion.
In addition, when the moisture content in partial raw materials is higher, the side feeding device is influenced by the high-temperature machine barrel, and the moisture of the raw materials volatilizes and condenses in the side feeding device, so that the feeding of the side feeding device is seriously influenced.
In addition, in the prior art, in order to enable the materials to enter the machine barrel of the host machine, a side feeding device for forced feeding needs to build a certain pressure at the position of entering the machine barrel, the materials fed through side feeding can be compacted into groups at the outlet section of the side feeding machine, and even the shape of the materials can be influenced, for example, hollow microspheres are crushed, the length-diameter ratio of brittle fillers is reduced, and the like, the agglomerated materials are not easy to infiltrate and disperse in a melt after entering the host machine, and finally the product quality is influenced. When the materials are seriously compacted, the main screw is also blocked or even damaged, and serious loss is caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a pre-impregnation side feeding device and a pre-impregnation side feeding method, and the specific technical scheme is as follows:
a prepreg side feeder comprising:
The extruder comprises an extruder body, a main machine barrel and a main machine, wherein the extruder body is provided with the main machine barrel which is configured to be mixed, melted, conveyed and extruded after materials are added;
The device comprises a material guiding device and a side feeding device, wherein the material guiding device is configured to guide out molten materials from a machine barrel of a host machine and then convey the molten materials into the side feeding device, and the side feeding device is configured to enable the materials added by a charging port of the side feeding device to be pre-mixed with the molten materials led in from the material guiding device in the side feeding device and then input into the machine barrel of the host machine.
In a specific embodiment, a main extrusion screw assembly is arranged in the host machine barrel, the main extrusion screw assembly is provided with a reverse thread section, and the material guiding device is communicated with the host machine barrel from the area where the reverse thread section is arranged, so that the molten material in the host machine barrel is guided into the material guiding device under the action of the reverse thread section.
In a specific embodiment, the material guiding device is provided with a temperature measuring and heating system for maintaining or heating the melted material in the material guiding device;
Preferably, the temperature measuring and heating system comprises a temperature measuring unit, a heating unit and a temperature control unit, wherein the temperature measuring unit is used for detecting the temperature of the pipe wall of the material guiding device and feeding back a signal to the temperature control unit, and the temperature control unit is used for controlling the heating unit to heat the pipe wall of the material guiding device to a preset temperature according to the signal.
In a specific embodiment, the side feeder has a thermometric heating system for maintaining or heating the molten material and the side feeder within the side feeder.
Preferably, the temperature measuring and heating system comprises a temperature measuring unit, a heating unit and a temperature control unit, wherein the temperature measuring unit is used for detecting the temperature of the machine barrel of the side feeding device and feeding back a signal to the temperature control unit, and the temperature control unit is used for controlling the heating unit to heat the machine barrel of the side feeding device to a preset temperature according to the signal.
In a specific embodiment, the side wall of the side feeder has an opening, and the introduction device communicates with the side wall opening of the side feeder to feed the molten material into the side feeder.
In a specific embodiment, the material guiding device is further configured to input the melted material from a charging port of the side feeding device into the side feeding device.
In a specific embodiment, the material guiding device comprises a first material guiding pipe section and a second material guiding pipe section, wherein the inlet end of the first material guiding pipe section is communicated with the host machine barrel, the outlet end of the first material guiding pipe section is communicated with the inlet end of the second material guiding pipe section, and the outlet end of the second material guiding pipe section is communicated with the side wall opening of the side feeding device;
Preferably, the first and second material guiding pipe sections are respectively provided with a temperature measuring and heating system for insulating or heating the molten materials in the first and second material guiding pipe sections.
In a specific embodiment, a first flow regulating assembly is disposed between the outlet end of the first conduit section and the inlet end of the second conduit section.
In a specific embodiment, an opening is formed in the pipe wall of the first material guiding pipe section, the inlet end of the second material guiding pipe section is abutted to the opening, an end cover is fixed to the end portion of the outlet end of the first material guiding pipe section, the first flow adjusting assembly comprises an adjusting plug and an adjusting rod, the adjusting plug is slidably arranged in the first material guiding pipe section and can shield the opening, the adjusting rod penetrates through the end cover and is connected with the adjusting plug, and the adjusting rod is in threaded fit with the end cover.
Preferably, the adjusting plug is provided with a buckle for clamping the adjusting rod.
In a specific embodiment, a diversion assembly is arranged between the outlet end of the second material guiding pipe section and the side feeding device;
preferably, the diversion assembly comprises an adjusting plate arranged at the outlet end of the second material guiding pipe section or at the side wall opening of the side feeding device, and the adjusting plate is provided with a plurality of overflow holes, and more preferably, the number of the overflow holes is more than one, and the overflow holes comprise round holes or strip-shaped holes.
In a specific embodiment, the side feeding device further comprises a feeding hopper, a feeding port of the side feeding device is arranged below the feeding hopper, and an outlet end of the guiding device extends into the feeding hopper or the feeding port of the side feeding device.
In a specific embodiment, the side feeding device further comprises a feeding hopper, wherein the feeding hopper is provided with an upper cover, and the upper cover is provided with a feeding hole and an exhaust hole;
Preferably, the feeding hole is connected with a discharge hole of the feeding scale through a pipeline;
preferably, the vent hole is provided with a filter device.
A prepreg-side feeding method, using the prepreg-side feeding apparatus according to any one of the foregoing aspects, comprising:
adding the materials into the host machine barrel, and mixing and melting in the host machine barrel;
The molten materials are led out from the host machine barrel and then conveyed into the side feeding device, so that the materials added by the feeding hole of the side feeding device are pre-mixed with the molten materials led in from the feeding device in the side feeding device, and then are conveyed into the host machine barrel to be further mixed with the existing molten materials in the host machine barrel;
Extruding the fully mixed materials.
In a specific embodiment, the water in the material added by the feed port of the side feeding device is heated and volatilized thoroughly during the pre-soaking process with the molten material, and is discharged through the feed port or the exhaust hole of the side feeding device.
The invention has at least the following beneficial effects:
In the invention, materials (such as resin components) are fed into a main machine barrel through a feed inlet of an extruder body, are conveyed, melted and mixed under the action of an extrusion screw assembly, and are conveyed into a side feeding device after being led out of the main machine barrel by a material guiding device, so that the materials added by the feed inlet of the side feeding device are pre-mixed with the melted materials led in from the material guiding device in the side feeding device, and are then input into the main machine barrel. Therefore, the side-feeding materials, such as powder, glass fiber and the like, are immersed with the melt in the side-feeding machine in advance, the influence of the side-feeding screw on the side-feeding materials can be weakened, the side-feeding materials and the melt are conveyed into a machine barrel of the host machine together through the side-feeding screw, and extrusion granulation is carried out after the side-feeding materials and the melt are mixed and uniformly dispersed in the melt under the action of the screw. The pre-impregnation side feeding method is beneficial to realizing side feeding of high components of materials such as powder, glass fiber and the like, and reduces the compression and shearing actions of feeding screws on the materials. And the high temperature of the molten material can evaporate the water in the side feeding device, so that the water in the side feeding material is forced to be discharged through a charging port or an exhaust hole of the side feeding device in advance, the mixing effect of the material in the processing process after the subsequent side feeding material enters the main machine barrel is ensured, the side feeding problem is solved, and the quality of the product is improved.
In addition, the equipment has simple structure, can be directly modified on the existing equipment, has small modification amount, stable operation, low failure rate and stable and reliable product quality, and solves the problems in the prior art.
Moreover, the device has simple structure, the inner wall of the cylinder body is smooth and clean, the cleaning and the production transfer are convenient, and if faults occur in the production process, operators on site can rapidly process the production and are not affected basically.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall schematic view of a prepreg-side feeder apparatus in example 1;
FIG. 2 is a cross-sectional view of the prepreg-side feeder in example 1;
FIG. 3 is a schematic view of a side wall opening of the side feeding device in example 1;
FIG. 4 is a schematic view of the adjusting plate of the side feeding device in example 2;
FIG. 5 is a schematic view of the adjusting plate of the side feeding device in example 3;
FIG. 6 is an overall schematic of the prepreg-side feeder apparatus in example 4;
FIG. 7 is a cross-sectional view of the prepreg side feeder in example 4;
FIG. 8 is an overall schematic view of the prepreg-side feeder apparatus in example 5;
FIG. 9 is a cross-sectional view of the prepreg-side feeder in example 5.
Description of main reference numerals:
101-host machine cylinder, 102-main charging hole, 103-machine head, 104, 105, 211-opening, 201-first material guiding pipe section, 202-second material guiding pipe section, 203-adjusting rod, 204-adjusting plug, 205, 210, 305-temperature measuring heating system, 206-end cover, 207, 306-fastener, 212-material guiding device, 301-side feeding device, 302-charging hole of side feeding device, 303-driving device, 304-machine frame, 307-adjusting plate, 3071-plate body, 3072-overflow hole and 308-feeding hopper.
Detailed Description
The invention is further described below in connection with the following detailed description. The drawings are for illustrative purposes only and are not to be construed as limiting the present patent, and certain components of the drawings may be omitted, enlarged or reduced in order to better illustrate embodiments of the present invention, and do not represent the actual product size, and it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
In the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., which are based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or elements referred to must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that the specific meanings of the terms described above should be understood by those skilled in the art according to circumstances.
Expressions (such as "first", "second", etc.) used in the various embodiments of the invention may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that, unless explicitly stated or defined otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
As shown in fig. 1, the present embodiment provides a prepreg side feeding device for kneading and extruding a material, particularly a resin material, comprising an extruder body, a feeding device, and a side feeding device 301.
Wherein the extruder body has a host barrel 101, the host barrel 101 configured to mix, melt, convey, and then extrude after the material is added. Specifically, the main cylinder 101 has a main feed port 102 for adding a material to be kneaded and molded, and preferably, the main feed port 102 is provided with a feeding scale (not shown in the drawing) having both ends connected to the hopper and the main feed port 102, respectively, through pipes so that the weight of the material fed from the main feed port 102 into the main cylinder 101 can be precisely controlled. It will be appreciated by those skilled in the art that the extruder body also has heating elements for heating and melting the material in order to mix and convey the material within the main machine barrel 101, and that the conveying elements, such as extrusion screws, convey and thoroughly mix the material to the extruder head 103, and that the extruder head 103 has a particular shape to give the material a particular shape when extruded, and that these parts of the extruder body are not described in any greater detail in this embodiment.
In this embodiment, the material guiding device is configured to guide out the molten material from the main machine barrel 101 and then convey the molten material to the side feeding device 301, and the side feeding device 301 is configured such that the material added to the feed port 302 of the side feeding device is pre-mixed with the molten material guided from the material guiding device in the side feeding device 301 and then input into the main machine barrel 101. Fig. 1 and 2 show a preferred material guiding device, which comprises a first material guiding pipe section 201 and a second material guiding pipe section 202, wherein the inlet end of the first material guiding pipe section 201 is communicated with the host machine barrel 101, the outlet end of the first material guiding pipe section 201 is communicated with the inlet end of the second material guiding pipe section 202, and the outlet end of the second material guiding pipe section 202 is communicated with the side wall opening of the side feeding device 301.
The main extruder screw assembly is provided in the main extruder barrel 101, and the main extruder screw assembly is provided with a reverse thread section, and the first material guiding pipe section 201 is communicated with the main extruder barrel 101 from the area where the reverse thread section is positioned, so that molten material in the main extruder barrel 101 is guided into the first material guiding pipe section 201 under the action of the reverse thread section. Specifically, the main machine barrel 101 has an opening 104 at a position corresponding to the reverse screw section, and the inlet end of the first guide pipe section 201 abuts against the opening 104, so that the molten material in the main machine barrel 101 flows from the opening 104 into the first guide pipe section 201. As shown in fig. 2, an opening 211 is provided on the pipe wall of the first material guiding pipe section 201, and the inlet end of the second material guiding pipe section 202 is abutted against the opening 211. The side wall of the side feeder 301 has an opening and the outlet end of the second guide tube section 202 communicates with the side wall opening of the side feeder 301 to feed molten material into the side feeder 301.
In this embodiment, the host barrel 101 also has an opening 105 at another location, and the outlet end of the side feeder 301 abuts the opening 105. The side feeder 301 has a drive device 303 that drives the side feed in the side feeder 301 and the molten material introduced from the lead device to mix and feed into the main barrel 101.
Preferably, as shown in fig. 1 and 2, the side feeder 301 in this embodiment has two barrel sections fixedly connected by fasteners 306, the first barrel section abutting the opening 105 of the host barrel 101, the second barrel section having a feed port for adding side feed and the outlet end of the second feed tube section 202 abutting the second barrel section. Preferably, the second barrel section is supported by the carriage 304.
Thus, in this embodiment, the material (e.g., resin component) is fed into the main machine barrel 101 through the feed port of the extruder body, is conveyed, melted and mixed by the action of the extrusion screw assembly, and is conveyed to the side feeding device 301 after the molten material is led out from the main machine barrel 101 by the material guiding device, and the material added through the feed port 302 of the side feeding device is pre-mixed with the molten material led in from the material guiding device in the side feeding device 301 by the side feeding device 301, and is then input into the main machine barrel 101. Therefore, the side-feeding materials, such as powder, glass fiber and the like, are immersed with the melt in the side-feeding machine in advance, the influence of the side-feeding screw on the side-feeding materials can be weakened, the side-feeding materials and the melt are conveyed into the machine barrel 101 of the host machine through the side-feeding screw together, and the side-feeding materials and the melt are extruded and granulated after being mixed and uniformly dispersed in the melt under the action of the screw. The pre-impregnation side feeding method is beneficial to realizing side feeding of high components of materials such as powder, glass fiber and the like, and reduces the compression and shearing actions of feeding screws on the materials. And the high temperature of the molten material can evaporate the water in the side feeding device, so that the water in the side feeding components is forced to be discharged through a charging port or an exhaust hole of the side feeding device in advance, the mixing effect of the material in the processing process after the subsequent side feeding material enters the host machine barrel 101 is ensured, the side feeding problem is solved, and the quality of the product is improved. In addition, the equipment has simple structure, can be directly modified on the existing equipment, has small modification amount, stable operation, low failure rate and stable and reliable product quality, and solves the problems in the prior art.
Preferably, the drive means 303 in the side feeding device may be a parallel co-rotating twin-screw side feeder, a parallel counter-rotating twin-screw side feeder, and other types of feedable. The screw combination in the host machine barrel 101 corresponding to the outlet end of the side feeding device is a conveying element with a large lead, and the screw combination to the discharge machine head 103 is provided with a shearing block, a toothed disc and other elements with a dispersing function. Thus, the side-fed material and the melt are conveyed into the main machine barrel 101 together through the side-feeding screw, and after entering the extruder barrel, the side-fed material and the melt are further evenly mixed with the melt in the main machine barrel 101 and extruded and granulated through the extruder head 103.
Preferably, the material guiding device is provided with a temperature measuring and heating system for preserving or heating the melted material in the material guiding device. Specifically, the first conduit section 201 has a thermometric heating system 205 and the second conduit section 202 also has a thermometric heating system 210. Further preferably, the temperature measurement heating system comprises a temperature measurement unit, a heating unit and a temperature control unit, wherein the temperature measurement unit is used for detecting the temperature of the pipe wall of the material guiding device and feeding back a signal to the temperature control unit, and the temperature control unit is used for controlling the heating unit to heat the pipe wall of the material guiding device to a preset temperature according to the signal. Thereby, the molten material introduced into the charging device can be kept in a molten state so that the side feeding is sufficiently pre-impregnated.
Preferably, the side feeder 301 has a thermometric heating system 305 for maintaining or heating the molten material and side feed within the side feeder 301. Further preferably, the thermometric heating system comprises a thermometric unit, a heating unit and a temperature control unit, wherein the thermometric unit is used for detecting the temperature of the machine barrel of the side feeding device 301 and feeding back a signal to the temperature control unit, and the temperature control unit is used for controlling the heating unit to heat the machine barrel of the side feeding device 301 to a preset temperature according to the signal. Thereby, the molten material entering the side feeding device 301 from the material guiding device can be kept in a molten state so that the side feeding is sufficiently pre-impregnated.
Preferably, a first flow regulating assembly is provided between the outlet end of the first primer tube segment 201 and the inlet end of the second primer tube segment 202. Further preferably, an end cover 206 is fixed at the end of the outlet end of the first material guiding pipe section 201, the end cover 206 is fixed by a fastener 207, the first flow adjusting assembly comprises an adjusting plug 204 and an adjusting rod 203, the adjusting plug 204 is slidably arranged in the first material guiding pipe section 201 and can shield an opening, the adjusting rod 203 penetrates through the end cover 206 and is connected with the adjusting plug 204, the adjusting rod 203 is in threaded fit with the end cover 206, and when a user rotates the adjusting rod 203, the adjusting rod 203 pushes the adjusting plug 204 to move back and forth to adjust the size of the opening. As shown in fig. 2, in the process of rotating the adjusting rod 203 by a user, due to the driving effect of the screw thread, the adjusting rod 203 drives the adjusting plug 204 to move back and forth, and the shielding area of the opening is changed in the process of moving the adjusting plug 204 back and forth, so that the opening degree of the opening is changed, and the overflow of the opening is adjusted.
Preferably, the adjusting plug 204 is provided with a buckle for clamping the adjusting rod 203.
Preferably, the side feeding device 301 further comprises a feeding hopper 308, and the feeding hole 302 of the side feeding device is arranged below the feeding hopper 308, and the feeding hole of the side feeding device 301 is connected with the discharging hole of the feeding scale through a pipeline.
Preferably, the side feeding device 301 further comprises a feeding hopper 308, and the feeding hopper 308 is provided with an upper cover, and a feeding hole and an exhaust hole are formed in the upper cover. It is further preferred that the vent holes are provided with a filter means, such as a filter screen or a filter cloth bag with micro holes.
Preferably, the outlet end of the second guide pipe section 202 or the side wall opening of the side feeding device 301 is provided with an adjusting plate 307, and the adjusting plate 307 can be replaced, so that the overflow is conveniently adjusted.
The present embodiment also provides a prepreg-side feeding method, using the prepreg-side feeding apparatus of the foregoing part of the present embodiment, of:
Adding the materials into a host machine barrel 101, and mixing and melting in the host machine barrel 101;
After the molten materials are led out from the host machine barrel 101, the molten materials are conveyed into the side feeding device 301, so that the materials added by the feeding opening 302 of the side feeding device are pre-mixed with the molten materials led in from the material guiding device in the side feeding device 301, and then are conveyed into the host machine barrel 101 to be further mixed with the existing molten materials in the host machine barrel 101;
Extruding the fully mixed materials.
Preferably, the moisture in the material added by the feed inlet 302 of the side feeding device is heated and volatilized thoroughly during the pre-impregnation process with the molten material, and is discharged through the feed inlet or vent of the side feeding device 301.
The following two sets of experiments are provided in this example:
Experiment 1, setting filler as whisker with certain length-diameter ratio, resin matrix polypropylene and a small amount of antioxidant (without adding compatilizer, etc.), and carrying out melt blending to obtain modified plastic, continuously producing for a certain time, and sampling and testing the results shown in the following table. It is evident from the table that the prepreg side feed has a significant increase in flexural modulus, indicating that the prepreg side feed helps to maintain the length of the brittle filler and also has an advantage over the flowability of the composite system (higher melt index). This is beneficial for the reinforcement of fillers with a certain aspect ratio without affecting the processability.
Experiment 2. The modified plastic is prepared through melt blending of hollow glass microsphere as stuffing, polypropylene resin matrix and small amount of antioxidant, and through continuous production for certain period of time, sampling and test. It is clear from the table that the prepreg side feed has a significant improvement in the retention of hollow glass microspheres, which is of great importance for the development of lightweight (low density) products.
Example 2
The main difference of this embodiment compared to embodiment 1 is that:
as shown in fig. 4, in this embodiment, a diverter assembly is provided between the outlet end of the second guide pipe section 202 and the side feeder 301.
Preferably, the diversion assembly comprises an adjustment plate 307 disposed at the outlet end of the second diversion pipe section 202 or at the sidewall opening of the side feeder 301, the plate body 3071 of the adjustment plate 307 being provided with an overflow aperture 3072. Further preferably, the number of the flow holes 3072 is plural, and the flow holes 3072 include circular holes.
Because the plate body 3071 of the adjusting plate 307 is provided with a plurality of overflow holes 3072, the contact area between the molten material and the side-feeding material can be increased, and the molten material and the side-feeding material can be promoted to be more fully and uniformly mixed.
Other features in this embodiment are the same as those in embodiment 1, and will not be described again.
Example 3
The main difference of this embodiment compared to embodiment 1 is that:
As shown in fig. 5, in this embodiment, a diverter assembly is provided between the outlet end of the second guide tube section 202 and the side feeder 301.
Preferably, the diversion assembly comprises an adjustment plate 307 disposed at the outlet end of the second diversion pipe section 202 or at the sidewall opening of the side feeder 301, the plate body 3071 of the adjustment plate 307 being provided with an overflow aperture 3072. Further preferably, the number of the flow holes 3072 is plural, and the flow holes 3072 include bar-shaped holes.
Because the plate body 3071 of the adjusting plate 307 is provided with a plurality of overflow holes 3072, the contact area between the molten material and the side-feeding material can be increased, and the molten material and the side-feeding material can be promoted to be more fully and uniformly mixed.
Other features in this embodiment are the same as those in embodiment 1, and will not be described again.
Example 4
The main difference of this embodiment compared to embodiment 1 is that:
as shown in fig. 6 and 7, the side feeding device 301 in this embodiment has two barrel sections fixedly connected by fasteners, the first barrel section is abutted against the opening of the main machine barrel 101, the second barrel section is provided with a feed port for adding side feeding, and the outlet end of the second feeding tube section 202 is abutted against the first barrel section.
Other features in this embodiment are the same as those in embodiment 1, and will not be described again.
Example 5
The main difference of this embodiment compared to embodiment 1 is that:
as shown in fig. 8 and 9, the tapping device 212 is further configured to feed molten material into the side feeder 301 from a feed port 302 of the side feeder.
Specifically, the outlet end of the guide 212 extends into the feed hopper 308 of the side feeder 301 or the feed inlet 302 of the side feeder.
Other features in this embodiment are the same as those in embodiment 1, and will not be described again.
As will be appreciated by one skilled in the art, the drawing is merely a schematic illustration of one preferred implementation scenario and the modules or flows in the drawing are not necessarily required to practice the invention.
Those skilled in the art will appreciate that modules in an apparatus in an implementation scenario may be distributed in an apparatus in an implementation scenario according to an implementation scenario description, or that corresponding changes may be located in one or more apparatuses different from the implementation scenario. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above-mentioned inventive sequence numbers are merely for description and do not represent advantages or disadvantages of the implementation scenario.
The foregoing disclosure is merely illustrative of some embodiments of the invention, and the invention is not limited thereto, as modifications may be made by those skilled in the art without departing from the scope of the invention.
Claims (20)
1. A prepreg-side feeder comprising:
The extruder comprises an extruder body, a main machine barrel and a main machine, wherein the extruder body is provided with the main machine barrel which is configured to be mixed, melted, conveyed and extruded after materials are added;
The side feeding device is configured to lead out molten materials from the host machine barrel and then convey the molten materials into the side feeding device, and the side feeding device is configured to enable the materials added by a charging port of the side feeding device to be pre-mixed with the molten materials led in from the side feeding device and then input into the host machine barrel to be further mixed with the molten materials existing in the host machine barrel;
The side feeding device is provided with a driving device, wherein the driving device is used for driving the materials in the side feeding device to be mixed with the molten materials introduced from the material guiding device and conveying the materials into the host machine barrel;
The material guiding device is provided with a temperature measuring and heating system and is used for preserving heat or heating the melted materials in the material guiding device;
the side feeding device is provided with a temperature measuring and heating system which is used for preserving or heating the molten material and the side feeding in the side feeding device.
2. A prepreg side feeder according to claim 1, wherein the host barrel has a main extrusion screw assembly therein, the main extrusion screw assembly having a reverse flighted section, the primer communicating with the host barrel from the region where the reverse flighted section is located such that molten material within the host barrel is introduced into the primer by the reverse flighted section.
3. A prepreg-side feeding apparatus according to claim 1, wherein the thermometric heating system comprises a thermometric unit for detecting the temperature of the pipe wall of the primer apparatus and feeding back a signal to the temperature control unit, a heating unit for controlling the heating unit to heat the pipe wall of the primer apparatus to a preset temperature according to the signal, and a temperature control unit.
4. A pre-impregnated side feeder according to claim 1, wherein the thermometric heating system comprises a thermometric unit for detecting the barrel temperature of the side feeder and feeding back a signal to the temperature control unit, a heating unit for controlling the heating unit to heat the barrel of the side feeder to a preset temperature in dependence on the signal.
5. A pre-impregnated side feeder according to claim 1 or claim 2, wherein the side feeder side wall has an opening, the introduction means communicating with the side feeder side wall opening to feed the molten material into the side feeder.
6. A pre-impregnated side feeder according to claim 1 or 2, wherein the feed device is further configured to feed the molten material into the side feeder from a feed port of the side feeder.
7. A prepreg side feeder according to claim 5, wherein the feeder comprises a first feeder section and a second feeder section, the inlet end of the first feeder section being in communication with the host barrel, the outlet end of the first feeder section being in communication with the inlet end of the second feeder section, the outlet end of the second feeder section being in communication with a sidewall opening of the side feeder.
8. A prepreg side feeder according to claim 7, wherein the first and second feed pipe sections each have a thermometric heating system for holding or heating the molten material within the first and second feed pipe sections.
9. A prepreg side feeder according to claim 7, wherein a first flow regulating assembly is provided between the outlet end of the first conduit section and the inlet end of the second conduit section.
10. A prepreg side feeder according to claim 9 wherein an opening is provided in the wall of the first feed pipe section, the inlet end of the second feed pipe section is in abutment with the opening, the end of the outlet end of the first feed pipe section is secured with an end cap, the first flow adjustment assembly comprises an adjustment plug slidably disposed within the first feed pipe section and capable of blocking the opening, and an adjustment rod passing through the end cap and connected to the adjustment plug, the adjustment rod being in threaded engagement with the end cap.
11. A prepreg side feeder according to claim 10, wherein the adjustment plug has a catch for engaging the adjustment bar.
12. A prepreg side feeder according to claim 7, wherein a diverter assembly is provided between the outlet end of the second feed pipe section and the side feeder.
13. A prepreg side feeder according to claim 12, wherein the diverter assembly comprises an adjustment plate provided at the outlet end of the second feed pipe section or at a side wall opening of the side feeder, the adjustment plate having an overflow aperture provided therein.
14. A prepreg side feeder according to claim 13 wherein the number of flow-through holes is plural, the flow-through holes comprising circular holes or strip-shaped holes.
15. A prepreg side feeder according to claim 6, wherein the side feeder further comprises a feed hopper, the feed inlet of the side feeder being positioned below the feed hopper, the outlet end of the feed guide extending into the feed hopper or the feed inlet of the side feeder.
16. A prepreg side feeder according to any one of claims 1 to 4, further comprising a feed hopper having an upper cover with feed and vent openings.
17. A prepreg side feeder according to claim 16, wherein the feed port is connected to the discharge port of the feeding scale by a pipe.
18. A prepreg side feeder according to claim 16, wherein the vent has a filter mounted thereon.
19. A prepreg-side feeding method, characterized in that the prepreg-side feeding apparatus according to any one of claims 1 to 18 is used for:
adding the materials into the host machine barrel, and mixing and melting in the host machine barrel;
The molten materials are led out from the host machine barrel and then conveyed into the side feeding device, so that the materials added by the feeding hole of the side feeding device are pre-mixed with the molten materials led in from the feeding device in the side feeding device, and then are conveyed into the host machine barrel to be further mixed with the existing molten materials in the host machine barrel;
Extruding the fully mixed materials.
20. A method of pre-impregnating a side feed according to claim 19, wherein the material added at the feed port of the side feeder is heated and volatilized thoroughly during pre-impregnation with the molten material, and is discharged through the feed port or vent of the side feeder.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910467855.8A CN110142943B (en) | 2019-05-31 | 2019-05-31 | Preimpregnation side feeding device and method |
| PCT/CN2020/085134 WO2020238461A1 (en) | 2019-05-31 | 2020-04-16 | Pre-impregnation side feeding device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910467855.8A CN110142943B (en) | 2019-05-31 | 2019-05-31 | Preimpregnation side feeding device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110142943A CN110142943A (en) | 2019-08-20 |
| CN110142943B true CN110142943B (en) | 2024-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910467855.8A Active CN110142943B (en) | 2019-05-31 | 2019-05-31 | Preimpregnation side feeding device and method |
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| Country | Link |
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| CN (1) | CN110142943B (en) |
| WO (1) | WO2020238461A1 (en) |
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| CN110142943B (en) * | 2019-05-31 | 2024-12-17 | 金发科技股份有限公司 | Preimpregnation side feeding device and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248513A (en) * | 1998-08-13 | 2000-03-29 | J·迪芬巴赫机器制造有限公司 | Method for making fibre reinforced plastics material and plastic extruder |
| CN210617235U (en) * | 2019-05-31 | 2020-05-26 | 金发科技股份有限公司 | Preimpregnated side feeding device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62156922A (en) * | 1985-12-28 | 1987-07-11 | Furukawa Electric Co Ltd:The | Extruder material supply/discharge device |
| DE10105812A1 (en) * | 2001-02-08 | 2002-08-14 | Quadrant Plastic Composites Ag | Glass fiber-reinforced thermoplastic sheet molding material manufacture involves supply of fibers pre-impregnated with part of the plastic melt into an extruder to combine with remaining melt |
| DE102009014363A1 (en) * | 2009-03-29 | 2010-09-30 | Dieffenbacher Gmbh + Co. Kg | Process for the cyclical production and continuous provision of a resin-filler mixture in the course of the production of plastic molded parts |
| JP2012025153A (en) * | 2010-06-21 | 2012-02-09 | Fp Corp | Multi-stage thermoplastic resin extrusion apparatus, and method of extruding thermoplastic resin using the same |
| CN108099157A (en) * | 2016-11-24 | 2018-06-01 | 李福来 | A kind of series circulation flow model plastic extruder |
| CN110142943B (en) * | 2019-05-31 | 2024-12-17 | 金发科技股份有限公司 | Preimpregnation side feeding device and method |
-
2019
- 2019-05-31 CN CN201910467855.8A patent/CN110142943B/en active Active
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2020
- 2020-04-16 WO PCT/CN2020/085134 patent/WO2020238461A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248513A (en) * | 1998-08-13 | 2000-03-29 | J·迪芬巴赫机器制造有限公司 | Method for making fibre reinforced plastics material and plastic extruder |
| CN210617235U (en) * | 2019-05-31 | 2020-05-26 | 金发科技股份有限公司 | Preimpregnated side feeding device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020238461A1 (en) | 2020-12-03 |
| CN110142943A (en) | 2019-08-20 |
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