Prepreg side feeding device and method

Abstract

The present invention provides a pre-impregnation side feeding device and method, the device comprises: an extruder body, the extruder body has a main machine barrel, the main machine barrel is configured to mix, melt, convey and then extrude after adding materials; a feed introduction device and a side feeding device, the feed introduction device is configured to draw out the molten material from the main machine barrel and convey it to the side feeding device, the side feeding device is configured to make the material added to the feeding port of the side feeding device first pre-impregnate and mix with the molten material introduced from the feed introduction device in the side feeding device, and then input into the main machine barrel. It can reduce the influence of the side feeding screw on the side feeding material, help to realize the side feeding of high-component materials such as powders and glass fibers, and reduce the compression and shearing effect of the feeding screw on the material. In addition, the moisture in the side feeding material is forced to be discharged through the feeding port or exhaust hole of the side feeding device in advance, ensuring the mixing effect of the material during the subsequent processing after the side feeding material enters the main machine barrel, thereby improving the side feeding problem and improving the quality of the product.

Description

Technical Field

[0001] The invention relates to the field of polymer material preparation facilities and processes, and in particular to a prepreg side feeding device and method. Background Art

[0002] In order to meet different product requirements, polymer materials often need to be modified by adding fillers, reinforcements, flame retardants and other components. Usually, the formulated materials are mixed and then melt-mixed, extruded and granulated through equipment such as screw extruders to prepare modified plastics.

[0003] Generally, high proportion of filling powder (or part of powder), glass fiber, flame retardant, etc. are forced to be added by side feeding to avoid stratification of premixed materials affecting product quality and main feeding causing accumulation at the feeding port of the extruder, blocking the main machine or affecting product performance, etc. However, conventional side feeding devices are simply forced feeding. When using flocculent powder, ultrafine powder, glass microbeads, short glass fiber and other materials (such as whiskers, wollastonite, talcum powder, titanium dioxide, calcium carbonate, short glass fiber, carbon fiber, glass microbeads, etc.) for production, the side feeding method has problems such as poor feeding and reduced feeding capacity, and the ratio requirements cannot be met. For high ratio side feeding, the problem is more prominent.

[0004] In addition, when the moisture content in some raw materials is high, the side feeding device is affected by the high-temperature barrel, and the moisture in the raw materials will evaporate and condense in the side feeding device, seriously affecting the feeding of the side feeding device.

[0005] Moreover, in the prior art, in order to allow the material to enter the barrel of the main machine, the side feeding device of forced feeding needs to establish a certain pressure at the entry into the barrel, which will compact the material added through the side feeding into a mass at the outlet section of the side feeding machine, and may even affect the shape of the material, such as crushing the hollow microspheres and reducing the aspect ratio of the brittle filler. After entering the main machine, the massed material is not easy to infiltrate and disperse in the melt, which ultimately affects the product quality. When the material is severely compacted, it will also cause the main screw to get stuck or even damage the screw, causing serious losses. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a prepreg side feeding device and method, and the specific technical scheme is as follows:

[0007] A prepreg side feeding device, comprising:

[0008] An extruder body, wherein the extruder body has a main machine barrel, and the main machine barrel is configured to mix, melt, convey and then extrude materials after adding them;

[0009] A material introduction device and a side feeding device, wherein the material introduction device is configured to draw out molten material from the main machine barrel and then convey it to the side feeding device, and the side feeding device is configured to allow the material added to the feeding port of the side feeding device to be pre-impregnated and mixed with the molten material introduced from the material introduction device in the side feeding device before being input into the main machine barrel.

[0010] In a specific embodiment, the main machine barrel has a main extrusion screw assembly, and the main extrusion screw assembly has a reverse thread segment. The feed introduction device is connected to the main machine barrel from the area where the reverse thread segment is located, so that the molten material in the main machine barrel is introduced into the feed introduction device under the action of the reverse thread segment.

[0011] In a specific embodiment, the material introducing device has a temperature measuring and heating system for keeping warm or heating the molten material in the material introducing device;

[0012] Preferably, the temperature measurement and heating system includes a temperature measuring unit, a heating unit and a temperature control unit. The temperature measuring unit is used to detect the temperature of the tube wall of the material introducing device and feedback a signal to the temperature control unit. The temperature control unit is used to control the heating unit according to the signal to heat the tube wall of the material introducing device to a preset temperature.

[0013] In a specific embodiment, the side feeding device has a temperature measurement and heating system for keeping warm or heating the molten material and the side feeding in the side feeding device.

[0014] Preferably, the temperature measurement and heating system includes a temperature measuring unit, a heating unit and a temperature control unit. The temperature measuring unit is used to detect the barrel temperature of the side feeding device and feed back a signal to the temperature control unit. The temperature control unit is used to control the heating unit according to the signal to heat the barrel of the side feeding device to a preset temperature.

[0015] In a specific embodiment, the side wall of the side feeding device has an opening, and the material introduction device is connected to the side wall opening of the side feeding device to input the molten material into the side feeding device.

[0016] In a specific embodiment, the feed introducing device is further configured to input the molten material into the side feeding device from a feed inlet of the side feeding device.

[0017] In a specific embodiment, the feed introduction device includes a first feed introduction pipe segment and a second feed introduction pipe segment, the inlet end of the first feed introduction pipe segment is connected to the main machine barrel, the outlet end of the first feed introduction pipe segment is connected to the inlet end of the second feed introduction pipe segment, and the outlet end of the second feed introduction pipe segment is connected to the side wall opening of the side feeding device;

[0018] Preferably, the first material introducing pipe section and the second material introducing pipe section respectively have a temperature measuring and heating system for keeping warm or heating the molten material in the first material introducing pipe section and the second material introducing pipe section.

[0019] In a specific embodiment, a first flow regulating component is disposed between the outlet end of the first material introducing pipe section and the inlet end of the second material introducing pipe section.

[0020] In a specific embodiment, an opening is provided on the tube wall of the first material introducing pipe section, the inlet end of the second material introducing pipe section is connected to the opening, an end cover is fixed to the end of the outlet end of the first material introducing pipe section, the first flow regulating assembly includes an regulating plug and an regulating rod, the regulating plug is slidably disposed in the first material introducing pipe section and can cover the opening, the regulating rod passes through the end cover and is connected to the regulating plug, and the regulating rod is threadedly engaged with the end cover.

[0021] Preferably, the adjusting plug has a buckle for clamping the adjusting rod.

[0022] In a specific embodiment, a flow splitter assembly is provided between the outlet end of the second material introducing pipe section and the side feeding device;

[0023] Preferably, the diversion assembly includes an adjustment plate arranged at the outlet end of the second material guide pipe section or the side wall opening of the side feeding device, and the adjustment plate is provided with a flow hole; further preferably, the number of the flow holes is multiple, and the flow holes include circular holes or strip holes.

[0024] In a specific embodiment, the side feeding device further includes a feeding hopper, the feeding port of the side feeding device is placed below the feeding hopper, and the outlet end of the material introducing device extends into the feeding hopper or the feeding port of the side feeding device.

[0025] In a specific embodiment, the side feeding device further comprises a feeding hopper, wherein the feeding hopper has an upper cover, and the upper cover is provided with a feeding hole and an exhaust hole;

[0026] Preferably, the feed hole is connected to the discharge port of the feeding scale through a pipeline;

[0027] Preferably, a filtering device is installed on the exhaust hole.

[0028] A prepreg side feeding method, using the prepreg side feeding device described in any of the above technical solutions, performs the following operations:

[0029] Adding materials into the main machine barrel, mixing and melting the materials in the main machine barrel;

[0030] The molten material is drawn out from the main machine barrel and then conveyed to the side feeding device, so that the material added to the feeding port of the side feeding device is first pre-impregnated and mixed with the molten material introduced from the drawing device in the side feeding device, and then input into the main machine barrel to further mix with the molten material already in the main machine barrel;

[0031] Extrude the fully mixed material.

[0032] In a specific embodiment, during the pre-impregnation process between the material added to the feeding port of the side feeding device and the molten material, the moisture in the material added to the feeding port of the side feeding device is heated and completely volatilized and discharged through the feeding port or the exhaust hole of the side feeding device.

[0033] The present invention has at least the following beneficial effects:

[0034] In the present invention, the material (such as resin component) is fed into the main barrel through the feed port of the extruder body, and is transported, melted and mixed by the extrusion screw assembly. The feed introduction device draws out the molten material from the main barrel and then transports it to the side feeding device. The side feeding device allows the material added to the feed port of the side feeding device to be pre-impregnated and mixed with the molten material introduced from the feed introduction device in the side feeding device before being input into the main barrel. Thus, the side-fed material, such as powder, glass fiber, etc., is pre-impregnated with the melt in the side feeding machine, which can reduce the influence of the side feeding screw on the side feeding material. The side-fed material is transported to the main barrel together with the melt through the side feeding screw, and is mixed and evenly dispersed in the melt by the action of the screw, and then extruded and granulated. The pre-impregnation side feeding method helps to realize the side feeding of high-component materials such as powder and glass fiber, and reduces the compression and shearing effect of the feeding screw on the material. Moreover, the high temperature of the molten material can evaporate the water in the side feeding device, thereby forcing the water in the side feeding material to be discharged through the feeding port or exhaust hole of the side feeding device in advance, ensuring the mixing effect of the material during the subsequent processing after the side feeding material enters the main machine barrel, thereby improving the side feeding problem and improving the quality of the product.

[0035] Moreover, the device has a simple structure and can be directly modified on existing equipment with a small amount of modification, stable operation, low failure rate, stable and reliable product quality, which solves the problems existing in the prior art.

[0036] Moreover, the device has a simple structure and the inner wall of the cylinder is flat and smooth, which makes it easy to clean and change production. If a failure occurs during the production process, the on-site operators can handle it quickly and production will not be affected.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 is an overall schematic diagram of the prepreg side feeding device in Example 1;

[0040] Figure 2 is a cross-sectional view of the prepreg side feeding device in Example 1;

[0041] Figure 3 is a schematic diagram of the side wall opening of the side feeding device in Example 1;

[0042] Figure 4 is a schematic diagram of an adjustment plate of a side feeding device in Example 2;

[0043] Figure 5 is a schematic diagram of an adjustment plate of a side feeding device in Example 3;

[0044] Figure 6 is an overall schematic diagram of the prepreg side feeding device in Example 4;

[0045] Figure 7 is a cross-sectional view of the prepreg side feeding device in Example 4;

[0046] Figure 8 is an overall schematic diagram of the prepreg side feeding device in Example 5;

[0047] Fig. 9 It is a cross-sectional view of the prepreg side feeding device in Example 5.

[0048] Description of main component symbols:

[0049] 101-main machine barrel; 102-main feeding port; 103-machine head; 104, 105, 211-opening; 201-first feed pipe section; 202-second feed pipe section; 203-adjusting rod; 204-adjusting plug; 205, 210, 305-temperature measurement and heating system; 206-end cover; 207, 306-fasteners; 212-feeding device; 301-side feeding device; 302-feeding port of side feeding device; 303-driving device; 304-frame; 307-adjusting plate; 3071-plate body; 3072-flow hole; 308-feeding hopper. DETAILED DESCRIPTION

[0050] The present invention is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary description and cannot be understood as limiting the present invention; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0051] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0052] The expressions (such as "first", "second", etc.) used in various embodiments of the present invention may modify the various constituent elements in various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing an element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the present invention, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0053] It should be noted that in the present invention, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Example 1

[0055] like Figure 1 As shown, this embodiment provides a prepreg side feeding device for mixing and extruding materials, especially resin materials. The prepreg side feeding device includes an extruder body, a feed introduction device and a side feeding device 301.

[0056] Among them, the extruder body has a main barrel 101, and the main barrel 101 is configured to mix, melt, convey and then extrude after adding materials. Specifically, the main barrel 101 has a main feed port 102 for adding materials that need to be mixed and formed. Preferably, the main feed port 102 is provided with a feed scale (not shown in the figure), and the two ends of the feed scale are respectively connected to the silo and the main feed port 102 through a pipeline, so that the weight of the material added to the main barrel 101 from the main feed port 102 can be accurately controlled. It can be understood by those skilled in the art that in order to mix and convey materials in the main barrel 101, the extruder body also has a heating element for heating and melting the material, and a conveying element such as an extrusion screw to convey the material to the extruder head 103 and fully mix it. The extruder head 103 has a specific shape so that the material has a specific shape when it is extruded. In this embodiment, these components of the extruder body are no longer introduced one by one.

[0057] In this embodiment, the feed-in device is configured to draw out the molten material from the main machine barrel 101 and then convey it to the side feeding device 301. The side feeding device 301 is configured so that the material added to the feeding port 302 of the side feeding device is first pre-impregnated and mixed with the molten material introduced from the feed-in device in the side feeding device 301, and then input into the main machine barrel 101. Figure 1 , Figure 2 A preferred material introducing device is shown, which includes a first material introducing pipe segment 201 and a second material introducing pipe segment 202, wherein the inlet end of the first material introducing pipe segment 201 is connected to the main machine barrel 101, the outlet end of the first material introducing pipe segment 201 is connected to the inlet end of the second material introducing pipe segment 202, and the outlet end of the second material introducing pipe segment 202 is connected to the side wall opening of the side feeding device 301.

[0058] The main extrusion screw assembly is provided in the main barrel 101, and the main extrusion screw assembly has a reverse thread segment. The first material introduction pipe segment 201 is connected to the main barrel 101 from the area where the reverse thread segment is located, so that the molten material in the main barrel 101 is introduced into the first material introduction pipe segment 201 under the action of the reverse thread segment. Specifically, the main barrel 101 has an opening 104 at a position corresponding to the reverse thread segment, and the inlet end of the first material introduction pipe segment 201 is connected to the opening 104, so that the molten material in the main barrel 101 flows into the first material introduction pipe segment 201 from the opening 104. Figure 2 As shown, the first material introducing pipe section 201 is provided with an opening 211 on the pipe wall, and the inlet end of the second material introducing pipe section 202 is connected to the opening 211. The side wall of the side feeding device 301 has an opening, and the outlet end of the second material introducing pipe section 202 is connected to the side wall opening of the side feeding device 301 to input the molten material into the side feeding device 301.

[0059] In this embodiment, another part of the main barrel 101 also has an opening 105, and the outlet end of the side feeding device 301 is connected to the opening 105. The side feeding device 301 has a driving device 303, which drives the side feeding material in the side feeding device 301 and the molten material introduced from the feed introduction device to mix and transport them into the main barrel 101.

[0060] Preferably, if Figure 1 , Figure 2 As shown, in this embodiment, the side feeding device 301 has two barrel sections fixedly connected by fasteners 306, the first barrel section is connected to the opening 105 of the main barrel 101, the second barrel section is provided with a feeding port for adding side feeding, and the outlet end of the second feed pipe section 202 is connected to the second barrel section. Preferably, the second barrel section is supported by a frame 304.

[0061] Thus, in this embodiment, the material (e.g., resin component) is fed into the main barrel 101 through the feed port of the extruder body, and is transported, melted, and mixed through the action of the extrusion screw assembly. The feed introduction device draws out the molten material from the main barrel 101 and then transports it to the side feeding device 301. The side feeding device 301 allows the material added to the feed port 302 of the side feeding device to be pre-impregnated and mixed with the molten material introduced from the feed introduction device in the side feeding device 301 before being input into the main barrel 101. Thus, the side-fed material, such as powder, glass fiber, etc., is pre-impregnated with the melt in the side feeder, which can reduce the influence of the side feeding screw on the side feeding material. The side feeding material is transported to the main barrel 101 together with the melt through the side feeding screw, and is mixed and dispersed uniformly in the melt through the action of the screw, and then extruded and granulated. The pre-impregnation side feeding method helps to realize the side feeding of high-component materials such as powder and glass fiber, and reduces the compression and shearing effect of the feeding screw on the material. Moreover, the high temperature of the molten material can evaporate the water in the side feeding device, thereby forcing the water in the side feeding component to be discharged through the feeding port or exhaust hole of the side feeding device in advance, ensuring the mixing effect of the material during the processing after the subsequent side feeding material enters the main machine barrel 101, thereby improving the side feeding problem and improving the quality of the product. Moreover, the device has a simple structure and can be directly modified on the existing equipment, with a small amount of modification, stable operation, low failure rate, stable and reliable product quality, and solves the problems existing in the prior art.

[0062] Preferably, the driving device 303 in the side feeding device can be a parallel co-rotating twin-screw side feeding machine, a parallel counter-rotating twin-screw side feeding machine, and other types that can feed materials. The screw assembly in the main barrel 101 corresponding to the outlet end of the side feeding device is a large-lead conveying element, and the screw assembly at the discharge head 103 is provided with shear blocks, toothed discs and other elements with a dispersing function. Thus, the side-fed material is conveyed to the main barrel 101 together with the melt through the side feeding screw. After the side-fed material and the melt enter the extruder barrel, they are further evenly mixed with the melt in the main barrel 101 and extruded and granulated through the extruder head 103.

[0063] Preferably, the feed introduction device has a temperature measurement and heating system for keeping warm or heating the molten material in the feed introduction device. Specifically, the first feed introduction pipe section 201 has a temperature measurement and heating system 205, and the second feed introduction pipe section 202 also has a temperature measurement and heating system 210. Further preferably, the temperature measurement and heating system includes a temperature measurement unit, a heating unit and a temperature control unit, the temperature measurement unit is used to detect the temperature of the tube wall of the feed introduction device and feed back a signal to the temperature control unit, and the temperature control unit is used to control the heating unit according to the signal to heat the tube wall of the feed introduction device to a preset temperature. Thus, the molten material introduced into the feed introduction device can be kept in a molten state so that the side feed material can be fully pre-impregnated.

[0064] Preferably, the side feeding device 301 has a temperature measurement and heating system 305, which is used to keep warm or heat the molten material and the side feeding material in the side feeding device 301. Further preferably, the temperature measurement and heating system includes a temperature measurement unit, a heating unit and a temperature control unit, the temperature measurement unit is used to detect the barrel temperature of the side feeding device 301 and feed back a signal to the temperature control unit, and the temperature control unit is used to control the heating unit according to the signal to heat the barrel of the side feeding device 301 to a preset temperature. In this way, the molten material entering the side feeding device 301 from the feed introduction device can be kept in a molten state so that the side feeding material can be fully pre-impregnated.

[0065] Preferably, a first flow regulating assembly is provided between the outlet end of the first material introducing pipe section 201 and the inlet end of the second material introducing pipe section 202. Further preferably, an end cap 206 is fixed to the end of the outlet end of the first material introducing pipe section 201, and the end cap 206 is fixed by a fastener 207. The first flow regulating assembly includes a regulating plug 204 and a regulating rod 203. The regulating plug 204 is slidably provided in the first material introducing pipe section 201 and can cover the opening. The regulating rod 203 passes through the end cap 206 and is connected to the regulating plug 204. The regulating rod 203 is threadedly matched with the end cap 206, so that when the user rotates the regulating rod 203, the regulating rod 203 pushes the regulating plug 204 to move forward and backward to adjust the size of the opening. Figure 2As shown, when the user rotates the adjusting rod 203, due to the driving action of the thread, the adjusting rod 203 drives the adjusting plug 204 to move forward and backward. During the movement of the adjusting plug 204 forward and backward, the blocking area of ​​the opening changes, which changes the opening degree of the opening, thereby adjusting the flow rate of the opening.

[0066] Preferably, the adjusting plug 204 has a buckle for clamping the adjusting rod 203 .

[0067] Preferably, the side feeding device 301 further comprises a feeding hopper 308, a feeding port 302 of the side feeding device is placed below the feeding hopper 308, and a feeding hole of the side feeding device 301 is connected to a discharge port of a feeding scale through a pipeline.

[0068] Preferably, the side feeding device 301 further comprises a feeding hopper 308, and the feeding hopper 308 has an upper cover, and a feeding hole and an exhaust hole are opened on the upper cover. Further preferably, a filtering device is installed on the exhaust hole, such as a filter screen or a filter bag with tiny holes.

[0069] Preferably, an adjustment plate 307 is provided at the outlet end of the second material introduction pipe section 202 or the side wall opening of the side feeding device 301, and the adjustment plate 307 can be replaced to facilitate adjustment of the flow rate.

[0070] This embodiment also provides a prepreg side feeding method, using the prepreg side feeding device of the previous part of this embodiment to perform the following operations:

[0071] Add the materials into the main machine barrel 101, and mix and melt them in the main machine barrel 101;

[0072] The molten material is drawn out from the main machine barrel 101 and transported to the side feeding device 301, so that the material added to the feeding port 302 of the side feeding device is first pre-impregnated and mixed with the molten material introduced from the drawing device in the side feeding device 301, and then input into the main machine barrel 101 to further mix with the molten material already in the main machine barrel 101;

[0073] Extrude the fully mixed material.

[0074] Preferably, during the pre-impregnation process of the material added to the feeding port 302 of the side feeding device with the molten material, the moisture in the material added to the feeding port 302 of the side feeding device is heated and completely volatilized and discharged through the feeding port or exhaust hole of the side feeding device 301.

[0075] The following two groups of experiments are provided in this embodiment:

[0076] Experiment 1: The filler is set as whisker with a certain aspect ratio, the resin matrix polypropylene and a small amount of antioxidant (no compatibilizer, etc. are added), melt blending is carried out to obtain modified plastics, and continuous production is carried out for a certain period of time. The sampling test results are shown in the following table. As can be seen from the table, the pre-impregnated side feeding has a significant improvement in the bending modulus, indicating that the pre-impregnated side feeding helps to maintain the length of the fragile filler and has an advantage in the fluidity of the composite system (higher melt index). This is beneficial for the reinforcement of fillers with a certain aspect ratio without affecting the processability.

[0077]

[0078] Experiment 2: Set the filler as hollow glass microspheres, the resin matrix polypropylene and a small amount of antioxidant (no compatibilizer, etc.) to melt blend and obtain modified plastics. Continue to produce for a certain period of time, and the sampling test results are shown in the following table. As can be seen from the table, pre-impregnation side feeding has a significant improvement in the retention rate of hollow glass microspheres, which is of great significance for the development of lightweight (low-density) products.

[0079]

[0080] Example 2

[0081] Compared with Example 1, the main differences of this embodiment are:

[0082] like Figure 4 As shown, in this embodiment, a flow dividing component is arranged between the outlet end of the second material introducing pipe section 202 and the side feeding device 301 .

[0083] Preferably, the flow splitter assembly includes an adjustment plate 307 disposed at the outlet end of the second material introduction pipe section 202 or the side wall opening of the side feeding device 301, and a flow hole 3072 is disposed on the plate body 3071 of the adjustment plate 307. Further preferably, the number of the flow holes 3072 is multiple, and the flow holes 3072 include circular holes.

[0084] Since the plate body 3071 of the regulating plate 307 has a plurality of flow holes 3072 , the contact area between the molten material and the side-fed material can be increased, thereby promoting a more complete and uniform mixing of the two.

[0085] The other features in this embodiment are the same as those in Embodiment 1 and will not be described in detail.

[0086] Example 3

[0087] Compared with Example 1, the main differences of this embodiment are:

[0088] like Figure 5 As shown, in this embodiment, a flow dividing component is arranged between the outlet end of the second material introducing pipe section 202 and the side feeding device 301 .

[0089] Preferably, the flow splitter assembly includes an adjustment plate 307 disposed at the outlet end of the second material introduction pipe section 202 or the side wall opening of the side feeding device 301, and a flow hole 3072 is disposed on the plate body 3071 of the adjustment plate 307. Further preferably, the number of the flow holes 3072 is multiple, and the flow holes 3072 include strip holes.

[0090] Since the plate body 3071 of the regulating plate 307 has a plurality of flow holes 3072 , the contact area between the molten material and the side-fed material can be increased, thereby promoting a more complete and uniform mixing of the two.

[0091] The other features in this embodiment are the same as those in Embodiment 1 and will not be described in detail.

[0092] Example 4

[0093] Compared with Example 1, the main differences of this embodiment are:

[0094] like Figure 6 , Figure 7 As shown, in this embodiment, the side feeding device 301 has two barrel sections fixedly connected by fasteners, the first barrel section is connected to the opening of the main barrel 101, the second barrel section is provided with a feeding port for adding side feeding, and the outlet end of the second feed pipe section 202 is connected to the first barrel section.

[0095] The other features in this embodiment are the same as those in Embodiment 1 and will not be described in detail.

[0096] Example 5

[0097] Compared with Example 1, the main differences of this embodiment are:

[0098] like Figure 8 , Fig. 9 As shown, the feed introduction device 212 is also configured to input the molten material into the side feeding device 301 from the feed port 302 of the side feeding device.

[0099] Specifically, the outlet end of the material introducing device 212 extends into the feeding hopper 308 of the side feeding device 301 or the feeding port 302 of the side feeding device.

[0100] The other features in this embodiment are the same as those in Embodiment 1 and will not be described in detail.

[0101] As those skilled in the art can understand, the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily required to implement the present invention.

[0102] Those skilled in the art will appreciate that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the implementation scenario description, or can be changed accordingly and located in one or more devices different from the implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0103] The above serial numbers of the present invention are only for description and do not represent the advantages or disadvantages of the implementation scenarios.

[0104] The above disclosure is only a few specific implementation scenarios of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A prepreg side feeding device, It is characterized in that include: An extruder body, wherein the extruder body has a main machine barrel, and the main machine barrel is configured to mix, melt, convey and then extrude materials after adding them; A material introduction device and a side feeding device, wherein the material introduction device is configured to introduce molten material from the main machine barrel and then convey it to the side feeding device, and the side feeding device is configured to allow the material added to the feeding port of the side feeding device to be pre-impregnated and mixed with the molten material introduced from the material introduction device in the side feeding device before being input into the main machine barrel for further mixing with the molten material already in the main machine barrel; The side feeding device has a driving device; wherein the driving device is used to drive the material in the side feeding device to mix with the molten material introduced from the feed introducing device, and to convey the material to the main machine barrel; The material introducing device has a temperature measuring and heating system for keeping the temperature of or heating the molten material in the material introducing device; The side feeding device has a temperature measuring and heating system for keeping warm or heating the molten material and the side feeding material in the side feeding device.

2. The prepreg side feeding device according to claim 1, It is characterized in that The main machine barrel has a main extrusion screw assembly, and the main extrusion screw assembly has a reverse thread segment. The feed introduction device is connected to the main machine barrel from the area where the reverse thread segment is located, so that the molten material in the main machine barrel is introduced into the feed introduction device under the action of the reverse thread segment.

3. The prepreg side feeding device according to claim 1, It is characterized in that The temperature measurement and heating system includes a temperature measurement unit, a heating unit and a temperature control unit. The temperature measurement unit is used to detect the temperature of the tube wall of the material introducing device and feed back a signal to the temperature control unit. The temperature control unit is used to control the heating unit according to the signal to heat the tube wall of the material introducing device to a preset temperature.

4. The prepreg side feeding device according to claim 1, It is characterized in that The temperature measurement and heating system includes a temperature measurement unit, a heating unit and a temperature control unit. The temperature measurement unit is used to detect the barrel temperature of the side feeding device and feed back a signal to the temperature control unit. The temperature control unit is used to control the heating unit according to the signal to heat the barrel of the side feeding device to a preset temperature.

5. The prepreg side feeding device according to claim 1 or 2, It is characterized in that The side wall of the side feeding device has an opening, and the material introduction device is connected to the side wall opening of the side feeding device to input the molten material into the side feeding device.

6. The prepreg side feeding device according to claim 1 or 2, It is characterized in that The feed introduction device is also configured to input the molten material into the side feeding device from the feed inlet of the side feeding device.

7. The prepreg side feeding device according to claim 5, It is characterized in that The material introducing device includes a first material introducing pipe section and a second material introducing pipe section, wherein the inlet end of the first material introducing pipe section is connected to the main machine barrel, the outlet end of the first material introducing pipe section is connected to the inlet end of the second material introducing pipe section, and the outlet end of the second material introducing pipe section is connected to the side wall opening of the side feeding device.

8. The prepreg side feeding device according to claim 7, It is characterized in that The first material introduction pipe section and the second material introduction pipe section respectively have a temperature measurement and heating system for keeping warm or heating the molten material in the first material introduction pipe section and the second material introduction pipe section.

9. The prepreg side feeding device according to claim 7, It is characterized in that A first flow regulating component is arranged between the outlet end of the first material introducing pipe section and the inlet end of the second material introducing pipe section.

10. The prepreg side feeding device according to claim 9, It is characterized in that An opening is provided on the tube wall of the first material introducing pipe section, the inlet end of the second material introducing pipe section is connected to the opening, an end cover is fixed to the end of the outlet end of the first material introducing pipe section, the first flow regulating assembly includes an regulating plug and an regulating rod, the regulating plug is slidably disposed in the first material introducing pipe section and can cover the opening, the regulating rod passes through the end cover and is connected to the regulating plug, and the regulating rod is threadedly engaged with the end cover.

11. The prepreg side feeding device according to claim 10, It is characterized in that The adjusting plug is provided with a buckle for clamping the adjusting rod.

12. The prepreg side feeding device according to claim 7, It is characterized in that A flow splitter component is provided between the outlet end of the second material introducing pipe section and the side feeding device.

13. The prepreg side feeding device according to claim 12, It is characterized in that The flow splitter assembly comprises an adjusting plate arranged at the outlet end of the second material introducing pipe section or at the side wall opening of the side feeding device, and the adjusting plate is provided with an overflow hole.

14. The prepreg side feeding device according to claim 13, It is characterized in that There are multiple flow holes, and the flow holes include round holes or strip holes.

15. The prepreg side feeding device according to claim 6, It is characterized in that The side feeding device also includes a feeding hopper, the feeding port of the side feeding device is placed below the feeding hopper, and the outlet end of the material introducing device extends into the feeding hopper or the feeding port of the side feeding device.

16. The prepreg side feeding device according to any one of claims 1 to 4, It is characterized in that The side feeding device also includes a feeding hopper, which has an upper cover with a feed hole and an exhaust hole.

17. The prepreg side feeding device according to claim 16, It is characterized in that The feed hole is connected to the discharge port of the feeding scale through a pipeline.

18. The prepreg side feeding device according to claim 16, It is characterized in that A filtering device is installed on the exhaust hole.

19. A prepreg side feeding method, It is characterized in that Using the prepreg side feeding device according to any one of claims 1 to 18, the following operations are performed: Adding materials into the main machine barrel, mixing and melting the materials in the main machine barrel; The molten material is drawn out from the main machine barrel and then conveyed to the side feeding device, so that the material added to the feeding port of the side feeding device is first pre-impregnated and mixed with the molten material introduced from the drawing device in the side feeding device, and then input into the main machine barrel to further mix with the molten material already in the main machine barrel; Extrude the fully mixed material.

20. The prepreg side feeding method according to claim 19, It is characterized in that During the pre-impregnation process between the material added to the feeding port of the side feeding device and the molten material, the moisture in the material added to the feeding port of the side feeding device is heated and completely volatilized, and is discharged through the feeding port or the exhaust hole of the side feeding device.

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