An extrusion structure for a plastic forming apparatus and a method of operating the same

Abstract

The application relates to the technical field of plastic forming manufacturing, in particular to an extrusion structure for a plastic forming device and an operation method thereof, which comprises an extrusion assembly, a heat dissipation assembly, a heating assembly, a control assembly and a nozzle body, the extrusion assembly is arranged in the nozzle body, the control assembly is arranged at the upper rear part of the nozzle body, the heat dissipation assembly is arranged in the nozzle body and is closely connected with the extrusion assembly below the extrusion assembly, the heating assembly is arranged at the lower part of the heat dissipation assembly and is connected with the heat dissipation assembly, a discharge nozzle is arranged at the bottom of the heating assembly, and air-cooling shaping assemblies are arranged at the two sides of the discharge nozzle. The extrusion structure for the plastic forming device can realize rapid feeding and melting discharging of the silk material, meanwhile, the innovative air outlet structure can ensure rapid cooling during the forming printing process of large products, and effectively meets the use needs of enterprises for the plastic forming device.

Description

Technical Field

[0001] This invention relates to the field of plastic molding manufacturing technology, and in particular to an extrusion structure for plastic molding equipment and its operating method. Background Technology

[0002] Plastic molding printing is a technology that manufactures solid parts by layering materials. From its early days as rapid prototyping, plastic molding printing has evolved into a widely used technology in various fields, including jewelry design and footwear design and manufacturing, industrial design, architectural design, engineering design and construction, automotive design and manufacturing, as well as aerospace, dentistry, and other medical fields. With the development of science and technology, more and more industries are demanding high-volume printing from plastic molding printing equipment. However, due to technological limitations, existing plastic molding printing equipment cannot yet meet the needs of high-volume plastic molding printing, specifically exhibiting the following problems:

[0003] 1. In existing plastic molding printing equipment, the auxiliary feeding roller and the active feeding roller in the extrusion assembly experience slippage of the filament during extrusion and conveying due to frictional wear or elasticity decay. This slippage is particularly noticeable in high-flow dual-feed systems, affecting the overall feeding of the plastic molding printing equipment. Furthermore, the existing active feeding roller is directly mounted on the drive motor shaft, resulting in poor operational stability over extended periods, which also impacts the extrusion and conveying of the filament.

[0004] 2. In existing plastic molding printing equipment, the feed hole in the heat dissipation component is a straight-through hole structure. During the feeding process, the filament is in smooth contact with the straight-through hole. Since the lower part of the heat dissipation component is connected to the heating component, the heating component will conduct heat to the lower part of the heat dissipation component. As a result, the filament in the straight-through hole structure of the heat dissipation component will expand due to heat on the side closer to the heating component and come into contact with the inner wall of the straight-through hole, thereby increasing the resistance of the filament to downward movement and affecting the smoothness of feeding.

[0005] 3. In existing plastic molding printing equipment, the heating component consists of a single heating channel. To facilitate the entry of the filament from the heat dissipation component into the heating channel, the diameter of the existing heating channel is relatively large. Although the filament can easily enter, the large diameter heating channel reduces the contact between the filament and the heating block, affecting the melting and heating of the filament by the heating block. Especially under the requirements of high-flow plastic molding printing, the existing heating block needs to be innovatively improved to meet the usage requirements.

[0006] In summary, existing plastic molding printing equipment is limited by factors such as the feeding method of its extrusion structure, the design of the feeding structure, and the cooling and shaping process during molding and printing. The size of the printed material is generally small and cannot meet the increasing industrial demand. Summary of the Invention

[0007] The main objective of this invention is to provide an extrusion structure and its operation method for plastic molding equipment. This extrusion structure for plastic molding equipment can realize rapid feeding and melting of filaments. At the same time, it adopts an innovative air outlet structure to ensure rapid cooling during the molding and printing process of large products, effectively meeting the needs of enterprises for plastic molding equipment.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An extrusion structure for a plastic molding equipment includes an extrusion assembly, a heat dissipation assembly, a heating assembly, a control assembly, and a nozzle body. The extrusion assembly is disposed inside the nozzle body, and the control assembly is disposed at the upper rear of the nozzle body. The heat dissipation assembly is disposed inside the nozzle body, located directly below the extrusion assembly and tightly inserted into it. The heating assembly is disposed below the heat dissipation assembly and connected to it. A discharge nozzle is installed at the bottom of the heating assembly, and air-cooled shaping assemblies are arranged on both sides of the discharge nozzle. The air-cooled shaping assemblies are bolted to the nozzle body and are used to cool and shape the product during the molding and printing process.

[0010] The extrusion assembly includes: a first extrusion fixing component, a hinge screw, a second extrusion fixing component, an extrusion connector, an auxiliary feeding wheel, and a main feeding wheel. The first extrusion fixing component is located at the upper part of the nozzle body. The main feeding wheel is located on the upper part of the heat dissipation assembly. The auxiliary feeding wheel is located on the opposite side of the main feeding wheel. The lower part of the extrusion connector is rotatably connected to the auxiliary feeding wheel. The upper part of the extrusion connector is rotatably connected to the first extrusion fixing component via a hinge screw. A feeding motor is installed at the rear of the nozzle body. The power output end of the feeding motor is connected to the main feeding wheel and drives the main feeding wheel to rotate and feed material. The upper part of the second extrusion fixing component is connected to the first extrusion fixing component via bolts. A bearing seat is provided below the second extrusion fixing component. A sliding bearing is installed in the bearing seat. The power output end of the feeding motor passes through the main feeding wheel and extends to the sliding bearing and is supported by the sliding bearing to provide stable support for the power output end of the feeding motor, thereby ensuring the working stability of the main feeding wheel.

[0011] Furthermore, the first extrusion fixture is provided with a dual-channel feed port, which runs through the first extrusion fixture from top to bottom. At the same time, the first extrusion fixture is also provided with two sets of elongated through holes.

[0012] Furthermore, an adjusting stud is provided in each of the two sets of elongated through holes. The bottom of the adjusting stud is connected to the top of the extrusion connector. An adjusting nut is threaded onto the adjusting stud. An adjusting spring is fitted onto the adjusting stud below the adjusting nut. The adjusting spring is located between the adjusting nut and the elongated through hole to ensure a stable upward pulling force of the adjusting stud on the extrusion connector.

[0013] Two sets of clamping ring grooves are provided on the auxiliary feeding wheel, and two sets of clamping tooth grooves are provided on the active feeding wheel. The two sets of clamping ring grooves on the auxiliary feeding wheel and the two sets of clamping tooth grooves on the active feeding wheel are arranged in opposite directions. During operation, the wire is located between the two sets of clamping ring grooves and the two sets of clamping tooth grooves, and enters the heat dissipation component under the action of the rotational conveying force of the two sets of clamping tooth grooves.

[0014] Furthermore, to facilitate the replacement of different models of the active feeding wheel, an assembly hole is provided in the center of the active feeding wheel, and a threaded locking hole is provided on the lower side of the active feeding wheel in a direction perpendicular to the assembly hole. The threaded locking hole is connected to the assembly hole, and a locking screw is installed in the threaded locking hole. The active feeding wheel is installed at the power output end of the feeding motor through the assembly hole, and the active feeding wheel is locked to the power output end of the feeding motor by the locking screw.

[0015] Furthermore, the heat dissipation component includes: a heat dissipation module and a cooling fan. The heat dissipation module is located directly above the heating component and is tightly connected to the heating component. The cooling fan is fixedly connected to the heat dissipation module and is located above the heating component. Two sets of feed through holes are machined inside the heat dissipation module. The feed through holes are divided into an open section, a middle section, and a thickened section. The open section, the middle section, and the thickened section are connected in sequence. The open section has a wide-mouth structure to facilitate the entry of the yarn. The inner diameter of the thickened section is larger than the inner diameter of the middle section so that the yarn has room for thermal expansion after being heated and will not be blocked.

[0016] Furthermore, the heating component is disposed inside the nozzle body, directly below the heat dissipation component, and fixedly connected to the heat dissipation component. The heating component includes a heating block, which is fixedly connected to a fixing frame symmetrically arranged inside the nozzle body.

[0017] Furthermore, two sets of heating channels are machined inside the heating block, and threaded holes adapted for the installation of the discharge nozzle are machined at the lower part of the heating block. The two sets of heating channels are connected to the threaded holes, and the discharge nozzle is screwed into the threaded holes by a threaded knob. In order to facilitate the entry of the wire into the heating channels and to contact and heat the wire after it enters, the heating channels are divided into an inlet section and a heating section. The inner diameter of the inlet section is larger than the inner diameter of the heating section.

[0018] Furthermore, the air-cooled shaping component includes a fixed bracket, a cooler, and an air guide. The fixed bracket is an L-shaped frame structure and is bolted to the lower two sides of the nozzle body. The cooler is installed on the upper part of the fixed bracket, and the air guide is installed on the lower part of the fixed bracket. A main air outlet is opened in the lower part of the inner cavity of the air guide, and a side air outlet is machined on the side of the inner cavity of the air guide. The side air outlet is a slanted diamond structure to facilitate the concentrated flow of cooling air to the material discharge and forming area of ​​the discharge nozzle, thereby achieving rapid material discharge, forming, and cooling of the filament.

[0019] The operating method of the extrusion structure for plastic molding equipment according to the present invention includes the following steps:

[0020] S1. The filament enters through the dual-channel feed port on the first extrusion fixture in the extrusion assembly. After entering, the filament is positioned between the auxiliary feed wheel and the active feed wheel. One side of the filament contacts the clamping ring groove on the auxiliary feed wheel, and the other side of the filament contacts the clamping ring groove on the active feed wheel.

[0021] S2. To ensure stable contact friction between the auxiliary feeding wheel and the active feeding wheel, the operator can adjust the rotating adjusting nut to compress the adjusting spring. This causes the adjusting spring to push the adjusting nut upward, creating an upward elastic force that allows the adjusting screw to exert a stable upward pulling force on the extrusion connector. The extrusion connector then drives the auxiliary feeding wheel to stably clamp the filament between the auxiliary feeding wheel and the active feeding wheel, preventing the filament from slipping.

[0022] S3. The wire passes through the feed hole in the heat dissipation module after passing between the auxiliary feed wheel and the active feed wheel, and passes through the opening section, the middle section and the thickened section in the feed hole in sequence.

[0023] S4. After passing through the feed hole, it enters the heating channel in the heating block. The heating channel is divided into an inlet section and a heating section. In order to facilitate the entry of the filament into the heating channel, the inner diameter of the inlet section corresponds to the thickened section in the heat dissipation module.

[0024] S5. In order to facilitate the contact between the filament and the heating channel and thus achieve rapid melting, the inner diameter of the heating section is smaller than the inner diameter of the inlet section, and the length L of the heating section is greater than the length S of the inlet section (S<1 / 3L). A threaded hole connected to the heating channel is machined at the lower part of the heating block. The molten filament flows at the threaded hole and is finally extruded from the discharge nozzle to perform filament plastic forming.

[0025] The beneficial effects of this invention are as follows: The overall structural design of the extrusion structure for plastic molding equipment of this invention is scientific, and in specific use, it has the following technical features and advantages:

[0026] 1. It can ensure stable clamping and conveying of the filament; the first extrusion fixing component of the present invention is provided with adjusting studs in the two sets of elongated through holes. The bottom of the adjusting stud is connected to the top of the extrusion connector. An adjusting nut is threaded on the adjusting stud. An adjusting spring is fitted on the adjusting stud below the adjusting nut. The adjusting spring pushes the adjusting nut with an upward elastic force to realize the stable upward pulling force of the adjusting stud on the extrusion connector. The extrusion connector drives the auxiliary feeding wheel to stably clamp the filament between the auxiliary feeding wheel and the active feeding wheel to avoid slippage of the filament.

[0027] 2. Ensures the wire material passes through the heat dissipation module; The invention has two sets of feeding holes processed in the heat dissipation module. The feeding holes are divided into a connected open section, a middle section and a thickened section from top to bottom. The open section has a wide-mouth structure to facilitate the entry of the wire material. When the wire material passes through the two sets of feeding holes, it enters the middle section from the open section and then enters the thickened section. The inner diameter of the thickened section is designed to be larger than the inner diameter of the middle section so that the wire material has room for thermal expansion after being heated, and will not be blocked, ensuring that the wire material passes through the heat dissipation module stably and smoothly.

[0028] 3. It can ensure that the wire material enters the heating component stably from the heat dissipation module and comes into contact with the heating component to melt and converge; two sets of heating channels are machined inside the heating block, which are divided into an inlet section and a heating section. In order to facilitate the wire material to enter the heating channel, the inner diameter of the inlet section corresponds to the thickened section in the heat dissipation module. At the same time, the inner diameter of the heating section is smaller than the inner diameter of the inlet section, which facilitates the contact between the wire material and the heating channel and thus achieves rapid melting. A threaded hole communicating with the heating channel is machined at the lower part of the heating block, and the molten wire material converges at the position of the threaded hole.

[0029] 4. Ensures rapid cooling and shaping of printed products; air-cooled shaping components are arranged on both sides of the nozzle. The main air outlet is opened in the lower part of the inner cavity of the air guide in the air-cooled shaping component. Side air outlets are machined on the side of the inner cavity of the air guide. The side air outlets are designed as slanted diamond structures. Cooling air can flow to the nozzle discharge and forming area through the main air outlet and the slanted diamond side air outlets, achieving rapid discharge, forming and cooling. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the extrusion structure for the plastic molding equipment of the present invention;

[0031] Figure 2 This is a partial enlarged view of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the first extrusion fixing member in this invention;

[0033] Figure 4 This is a schematic diagram of the overall structure of the heat dissipation module in this invention;

[0034] Figure 5 This is a cross-sectional view of the heat dissipation module in this invention;

[0035] Figure 6 This is a schematic diagram of the heating block in the present invention;

[0036] Figure 7 This is a cross-sectional schematic diagram of the heating block in this invention;

[0037] Figure 8 This is a schematic diagram of the active feeding wheel in this invention;

[0038] Figure 9 This is a schematic diagram of the structure of the second extrusion fixing member in this invention;

[0039] Figure 10 This is a schematic diagram of a half-section of the extruded connector in this invention;

[0040] Figure 11 This is a schematic diagram of the air-cooled shaping component in this invention;

[0041] Figure 12 This is a schematic diagram of the extrusion assembly in this invention;

[0042] The diagram is labeled as follows: 1-Extrusion assembly, 2-Heat dissipation assembly, 3-Heating assembly, 4-Control assembly, 5-Nozzle body, 6-Discharge nozzle, 7-Air-cooled shaping assembly, 8-Filament; 11-First extrusion fixing component, 12-Hinge screw, 13-Extrusion connector, 14-Second extrusion fixing component, 15-Auxiliary feeding wheel, 16-Active feeding wheel, 17-Feeding motor; 111-Dual-channel feed inlet, 112-Elongated through hole; 131-Adjusting stud, 132-Adjusting nut, 133-Adjusting... Spring; 134-long slotted through hole; 141-bearing seat; 151-clamping ring groove; 161-clamping tooth groove; 162-assembly hole; 163-threaded locking hole; 21-heat dissipation module; 22-feed through hole; 221-open section; 222-middle section; 223-thickened section; 31-heating block; 32-heating channel; 321-inlet section; 322-heating section; 323-threaded hole; 71-fixed bracket; 72-cooler; 73-air guide; 74-main air outlet; 75-side air outlet. Detailed Implementation

[0043] Specific Embodiment 1: To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that: In the present invention, unless otherwise specified, all embodiments and preferred methods mentioned herein can be combined to form new technical solutions. In the present invention, unless otherwise specified, all technical features and preferred features mentioned herein can be combined to form new technical solutions. The "scope" disclosed in the present invention can be in the form of a lower limit and an upper limit, and can be one or more lower limits and one or more upper limits, respectively. Unless otherwise stated, the technical and scientific terms used herein have the same meaning as those skilled in the art.

[0044] As per the instruction manual Figure 1 Instruction manual attached Figure 2 Instruction manual attached Figure 9 Instruction manual attached Figure 10 and instruction manual attached Figure 12 As shown, existing plastic molding printing equipment is limited by factors such as the feeding method, feeding structure, and cooling and shaping during the molding and printing process, resulting in generally small printable sizes that cannot meet the increasing industrial demands. This invention provides an extrusion structure for plastic molding equipment, comprising an extrusion component 1, a heat dissipation component 2, a heating component 3, a control component 4, and a nozzle body 5. The nozzle body 5 supports and mounts the extrusion component 1, heat dissipation component 2, heating component 3, and control component 4. During installation, the extrusion component 1 is installed inside the nozzle body 5 at an upper position. A control component 4 is provided at the upper rear of the nozzle body 5 to control the operation of the extrusion component 1, the heat dissipation component 2, and the heating component 3. The heat dissipation component 2, which is used to dissipate heat from the filament 8, is located inside the nozzle body 5 and is located directly below the extrusion component 1 and is tightly inserted into the extrusion component 1. The heating component 3, which is used to heat the filament 8, is located at the lower part of the heat dissipation component 2 and is connected to the heat dissipation component 2. A discharge nozzle 6 is installed at the bottom of the heating component 3, and air-cooled shaping components 7 are arranged on both sides of the discharge nozzle 6. The air-cooled shaping components 7 are connected to the nozzle body 5 by bolts and are used to cool and shape the product during the forming and printing process.

[0045] The extrusion assembly 1 for extruding and conveying the filament 8 includes: a first extrusion fixing member 11, a hinge screw 12, a second extrusion fixing member 14, an extrusion connector 13, an auxiliary feeding wheel 15, and a main feeding wheel 16. The first extrusion fixing member 11 is located inside the upper part of the nozzle body 5 for mounting the second extrusion fixing member 14 and the extrusion connector 13. The main feeding wheel 16 is located on the upper part of the heat dissipation assembly 2, and the auxiliary feeding wheel 15 is located on the corresponding side of the main feeding wheel 16. The lower part of the extrusion connector 13 is rotatably connected to the auxiliary feeding wheel 15, and the upper part is connected to the first extrusion fixing member 11 via a hinge screw. The wire 12 is rotatably connected, and a feeding motor 17 is installed behind the nozzle body 5. During installation, the power output end of the feeding motor 17 is connected to the active feeding wheel 16 and drives the active feeding wheel 16 to rotate and feed material. The upper part of the second extrusion fixing member 14 is connected to the first extrusion fixing member 11 by bolts. A bearing seat 141 is provided below the second extrusion fixing member 14. A sliding bearing is installed in the bearing seat 141. The power output end of the feeding motor 17 passes through the active feeding wheel 16 and extends to the sliding bearing to provide stable support for the power output end of the feeding motor 17, thereby ensuring the working stability of the active feeding wheel 16.

[0046] As per the instruction manual Figure 2 and instruction manual attached Figure 3 As shown, the first extrusion fixing member 11, which is used to install the second extrusion fixing member 14 and the extrusion connector 13, is provided with a dual-channel feed port 111 adapted to the entry of the filament 8. The dual-channel feed port 111 is arranged from top to bottom through the first extrusion fixing member 11. At the same time, two sets of elongated through holes 112 are also provided on the first extrusion fixing member 11. The extrusion connector 13 is provided with an elongated slotted through hole 134 adapted to the passage of the filament 8. During installation, the elongated slotted through hole 134 is arranged corresponding to the dual-channel feed port 111, and the elongated slotted through hole 134 can guide the filament 8 in the front and rear directions to ensure that the filament 8 enters stably between the clamping ring groove 151 and the clamping tooth groove 161. An adjusting stud 131 is inserted through each of the two sets of elongated through holes 112 (the size of the elongated through holes 112 needs to ensure that the adjusting stud 131 has room for vertical adjustment). The bottom of the adjusting stud 131 is connected to the top of the extrusion connector 13 (it can be a movable connection). An adjusting nut 132 is threaded onto the adjusting stud 131. An adjusting spring 133 is fitted onto the adjusting stud 131 below the adjusting nut 132. The adjusting spring 133 is located between the adjusting nut 132 and the elongated through hole 112 to ensure a stable upward pulling force of the adjusting stud 131 on the extrusion connector 13, thereby ensuring that the auxiliary feeding wheel 15 on the extrusion connector 13 applies a stable contact friction force to the filament 8, and ensuring stable feeding of the filament 8 between the auxiliary feeding wheel 15 and the active feeding wheel 16.

[0047] As per the instruction manual Figure 2 and instruction manual attached Figure 8 As shown, in order to ensure stable clamping and conveying of the filament 8, two sets of clamping ring grooves 151 are provided on the auxiliary feeding wheel 15, and two sets of clamping tooth grooves 161 are provided on the active feeding wheel 16 (the clamping tooth grooves 161 are provided with arc-shaped teeth that contact the filament 8, and the arc-shaped teeth can increase the contact friction with the filament 8). The two sets of clamping ring grooves 151 on the auxiliary feeding wheel 15 are arranged correspondingly to the two sets of clamping tooth grooves 161 on the active feeding wheel 16. During operation, the filament 8 is located between the two sets of clamping ring grooves 151 and the two sets of clamping tooth grooves 161, and enters the heat dissipation component 2 under the rotation of the two sets of clamping tooth grooves 161. To facilitate the replacement of different models of the active feed wheel 16, an assembly hole 162 is provided in the center of the active feed wheel 16, and a threaded locking hole 163 is provided on the lower side of the active feed wheel 16 in a direction perpendicular to the assembly hole 162. The threaded locking hole 163 communicates with the assembly hole 162, and a locking screw is installed in the threaded locking hole 163. During installation, for ease of disassembly and assembly, the installation of the active feed wheel 16 is directional (as shown in the instruction manual). Figure 8 As shown, it has an inner assembly surface A and an outer assembly surface B, as per the attached instruction manual. Figure 2 and instruction manual attached Figure 8 As shown, the active feeding wheel 16 can be installed at the power output end of the feeding motor 17 through the mounting hole 162 (the A side of the active feeding wheel 16 is close to the feeding motor 17, and the B side is close to the second extrusion fixing member 14), and the active feeding wheel 16 is locked to the power output end of the feeding motor 17 by the locking screw.

[0048] As per the instruction manual Figure 4 and instruction manual attached Figure 5 As shown, the heat dissipation component 2 for dissipating heat from the filament 8 before it enters the heating block 31 includes: a heat dissipation module 21 and a heat dissipation fan. The heat dissipation module 21 is positioned directly above the heating component 3 and is tightly connected to it. The heat dissipation fan, which provides cooling air, is fixedly connected to the heat dissipation module 21 and is located above the heating component 3. Two sets of feed through holes 22, adapted for the filament 8 to pass through, are machined inside the heat dissipation module 21. Each feed through hole 22 is divided into an open section 221, a middle section 222, and a thickened section 222. 23. The opening section 221, the middle section 222, and the thickened section 223 are connected in sequence. The opening section 221 has a wide-mouth structure to facilitate the entry of the filament 8. The middle section 222 is used to guide the filament 8 into the hole. The inner diameter of the thickened section 223 in the feed hole 22 is larger than the inner diameter of the middle section 222 so that the filament 8 has thermal expansion space after being heated. This avoids the filament 8 from having large expansion friction contact with the inner wall of the hole below the feed hole 22 of the heat dissipation module 21, thereby ensuring that the filament 8 enters the heating block 31 smoothly and that the feeding of the filament 8 is stable.

[0049] As per the instruction manual Figure 6 and instruction manual attached Figure 7 As shown, the heating component 3 for heating the filament 8 is located inside the nozzle body 5, directly below the heat dissipation component 2, and is fixedly connected to the heat dissipation component 2. The heating component 3 includes a heating block 31, which is fixedly connected to a fixed frame symmetrically arranged inside the nozzle body 5. Meanwhile, two sets of heating channels 32 are machined inside the heating block 31 to heat and melt the wire 8. A threaded hole 323 adapted to the installation of the discharge nozzle 6 is machined at the lower part of the heating block 31. The two sets of heating channels 32 are connected to the threaded hole 323. The discharge nozzle 6 is screwed into the threaded hole 323. It should be noted that, in order to facilitate the entry of the wire 8 into the heating channel 32 and to facilitate contact heating of the wire 8 after entry, the heating channel 32 is divided into an inlet section 321 and a heating section 322. The inner diameter of the inlet section 321 in the heating channel 32 is larger than the inner diameter of the heating section 322, and the length of the inlet section 321 is smaller than the length of the heating section 322, so as to ensure that the heating section 322 can have an effective contact stroke with the wire 8 and achieve full melting of the wire 8.

[0050] As per the instruction manual Figure 11 As shown, the air-cooled shaping component 7 for cooling and shaping the molded product includes a fixed bracket 71, a cooler 72, and an air guide 73. The fixed bracket 71 is used to support the cooler 72 and the air guide 73. The fixed bracket 71 has an L-shaped frame structure. During installation, the fixed bracket 71 is bolted to the lower two sides of the nozzle body 5. The cooler 72 is installed on the upper part of the fixed bracket 71, and the air guide 73 is installed on the lower part. A main air outlet 74 for cooling airflow is opened in the lower part of the inner cavity of the air guide 73. The main air outlet 74 is used for primary cooling of the molded product. Simultaneously, a side air outlet 75 is machined on the inner side of the air guide 73. The side air outlet 75 has a slanted diamond structure to facilitate concentrated cooling airflow towards the material discharge nozzle 6 forming area for secondary cooling of the molded product, achieving rapid material discharge forming and cooling.

[0051] In the specific installation of the extrusion structure for plastic molding equipment provided by this invention, the installer can first install the extrusion assembly 1. Specifically, the first extrusion fixing member 11 can be installed in the upper part of the nozzle body 5, the active feeding wheel 16 can be installed on the upper part of the heat dissipation assembly 2, the auxiliary feeding wheel 15 can be installed on the corresponding side of the active feeding wheel 16, the upper part of the second extrusion fixing member 14 can be connected to the first extrusion fixing member 11 by bolts, the auxiliary feeding wheel 15 can be rotatably installed on the lower part of the extrusion connector 13 and rotatably connected to the upper part of the first extrusion fixing member 11, and the feeding motor 17 can be installed at the rear of the nozzle body 5, and the power output end of the feeding motor 17 can be connected to the active feeding wheel 16. Next, the heat dissipation component 2 and the heating component 3 are installed. The heat dissipation module 21 is installed directly above the heating component 3 and tightly connected to it. The cooling fan used to provide cooling air is fixedly installed to the heat dissipation module 21. Two sets of feed through holes 22 for the thread 8 are machined inside the heat dissipation module 21. The feed through holes 22 are divided into an open section 221, a middle section 222, and a thickened section 223, and the three are connected in sequence. The open section 221 is designed with a wide mouth (bowl-shaped) structure to facilitate the entry of the thread 8 (for smooth connection (insertion) of the thread 8, see the attached instruction manual). Figure 2 and instruction manual attached Figure 4 As shown, the opening section 221 on the heat dissipation module 21 protrudes from the heat dissipation module 21 and extends to the gap between the auxiliary feeding wheel 15 and the active feeding wheel 16. The middle section 222 is used to guide the filament 8 into the feed. The inner diameter of the thickened section 223 in the feed through hole 22 is larger than the inner diameter of the middle section 222, so that the filament 8 has thermal expansion space after being heated, avoiding the filament 8 from blocking the feed through hole 22 and ensuring stable feeding of the filament 8. The heating component 3 is installed inside the nozzle body 5, located directly below the heat dissipation component 2, and is fixedly connected to the heat dissipation component 2. Two sets of heating channels 32 are machined inside the heating block 31, and a threaded hole 323 is machined at the lower part of the heating block 31. The two sets of heating channels 32 are connected to the threaded hole 323. The discharge nozzle 6 is screwed into the threaded hole 323 by a threaded knob. Thus, the installation process of the present invention is completed.

[0052] In practical use, the wire 8 enters through the dual-channel feed port 111 on the first extrusion fixing member 11 of the extrusion assembly 1 and then through the elongated slot through hole 134 on the extrusion connector 13. After passing through the elongated slot through hole 134, the wire 8 enters and is positioned between the auxiliary feeding wheel 15 and the active feeding wheel 16. At this time, one side of the wire 8 contacts the clamping ring groove 151 on the auxiliary feeding wheel 15, and the other side of the wire 8 contacts the clamping ring groove 151 on the active feeding wheel 16. To ensure that the wire 8 has a stable contact friction force between the auxiliary feeding wheel 15 and the active feeding wheel 16, a threaded fitting is installed on the adjusting stud 131. An adjusting nut 132 is used, and an adjusting spring 133 is fitted onto the adjusting stud 131 on the lower side of the adjusting nut 132. The operator can adjust and rotate the adjusting nut 132 to compress the adjusting spring 133, so that the adjusting spring 133 pushes the adjusting nut 132 with an upward elastic force, thereby realizing the stable upward pulling force of the adjusting stud 131 on the extrusion connector 13. The extrusion connector 13 drives the auxiliary feeding wheel 15 to stably clamp the filament 8 between the auxiliary feeding wheel 15 and the active feeding wheel 16, preventing the filament 8 from slipping. After passing through the auxiliary feeding wheel 15 and the active feeding wheel 16, the filament 8 enters the heat dissipation module 2. The feed through-hole 22 in section 1 passes sequentially through the opening section 221, the middle section 222, and the thickening section 223. During this process, the opening section 221 has a wide-mouth structure to facilitate the entry of the filament 8. After entering the middle section 222 from the opening section 221, it then enters the thickening section 223. The inner diameter of the thickening section 223 is designed to be larger than the inner diameter of the middle section 222, so that the filament 8 has room for thermal expansion after being heated, preventing blockage and ensuring stable and smooth passage of the filament 8 through the heat dissipation module 21. After exiting through the feed through-hole 22, it enters the heating channel 32 in the heating block 31. The heating channel 32 is further divided into an inlet section 32. 1. In the heating section 322, to facilitate the entry of the filament 8 into the heating channel 32, the inner diameter of the inlet section 321 corresponds to the thickened section 223 in the heat dissipation module 21. Simultaneously, to facilitate contact between the filament 8 and the heating channel 32 for rapid melting, the inner diameter of the heating section 322 is smaller than the inner diameter of the inlet section 321, and the length L of the heating section 322 is greater than the length S of the inlet section 321 (S < 1 / 3L). A threaded hole 323 communicating with the heating channel 32 is machined at the lower part of the heating block 31. The molten filament 8 converges at the threaded hole 323 and is finally extruded from the outlet nozzle 6 for plastic forming. The above describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An extrusion structure for a plastic molding equipment, characterized in that, It includes an extrusion assembly (1), a heat dissipation assembly (2), a heating assembly (3), a control assembly (4), and a nozzle body (5); The extrusion assembly (1) is located inside the nozzle body (5). A control assembly (4) is located at the upper rear of the nozzle body (5). The heat dissipation assembly (2) is located inside the nozzle body (5), directly below the extrusion assembly (1), and tightly connected to the extrusion assembly (1). The heating assembly (3) is located at the lower part of the heat dissipation assembly (2) and connected to the heat dissipation assembly (2). A discharge nozzle (6) is installed at the bottom of the heating assembly (3). Air-cooled shaping assemblies (7) are arranged on both sides of the discharge nozzle (6). The air-cooled shaping assemblies (7) are connected to the nozzle body (5) by bolts and are used to cool and shape the product during the molding and printing process. The extrusion assembly (1) includes: a first extrusion fixing member (11), a hinge screw (12), a second extrusion fixing member (14), an extrusion connector (13), an auxiliary feeding wheel (15), and an active feeding wheel (16). The first extrusion fixing member (11) is located at the upper part of the nozzle body (5). The active feeding wheel (16) is located at the upper part of the heat dissipation assembly (2). The auxiliary feeding wheel (15) is located on the opposite side of the active feeding wheel (16). The lower part of the extrusion connector (13) is rotatably connected to the auxiliary feeding wheel (15). The upper part of the extrusion connector (13) is rotatably connected to the first extrusion fixing member (11) through the hinge screw (12). A feeding motor (17) is installed at the rear of the nozzle body (5). The power output end of the feeding motor (17) is connected to the active feeding wheel (16) and drives the active feeding wheel (16) to rotate and feed material. The upper part of the second extrusion fixing member (14) is connected to the first extrusion fixing member (11) by bolts. A bearing seat (141) is provided below the second extrusion fixing member (14). A sliding bearing is installed in the bearing seat (141). The power output end of the feeding motor (17) passes through the active feeding wheel (16) and extends to the sliding bearing and slides in contact with the sliding bearing to provide stable support for the power output end of the feeding motor (17) and thus ensure the working stability of the active feeding wheel (16). The heat dissipation component (2) includes a heat dissipation module (21) and a heat dissipation fan. The heat dissipation module (21) is located directly above the heating component (3) and is tightly connected to the heating component (3). The heat dissipation fan is fixedly connected to the heat dissipation module (21) and is located above the heating component (3). Two sets of feed through holes (22) are machined inside the heat dissipation module (21). The feed through holes (22) are divided into an open section (221), a middle section (222), and a thickened section (223). The open section (221), the middle section (222), and the thickened section (223) are connected in sequence. The open section (221) has a wide-mouth structure to facilitate the entry of the filament (8). The inner diameter of the thickened section (223) is larger than the inner diameter of the middle section (222) so that the filament (8) can expand thermally after being heated. The expansion space is provided to prevent the filament (8) from expanding and rubbing against the inner wall of the feed hole (22) of the heat dissipation module (21) below, thereby ensuring that the filament (8) enters the heating block (31) smoothly and that the feeding of the filament (8) is stable and will not be blocked. In order to facilitate the smooth insertion of the filament (8), the opening section (221) on the heat dissipation module (21) protrudes from the heat dissipation module (21) and extends to the gap between the auxiliary feeding wheel (15) and the active feeding wheel (16). The heating component (3) is set inside the nozzle body (5), located directly below the heat dissipation component (2), and is fixedly connected to the heat dissipation component (2). The heating component (3) includes a heating block (31), which is fixedly connected to the fixed frame symmetrically arranged inside the nozzle body (5). Two sets of heating channels (32) are machined inside the heating block (31). A threaded hole (323) adapted to the installation of the discharge nozzle (6) is machined at the lower part of the heating block (31). The two sets of heating channels (32) are connected to the threaded hole (323). The discharge nozzle (6) is screwed into the threaded hole (323) by a threaded knob. In order to facilitate the entry of the wire (8) into the heating channel (32) and to contact and heat the wire (8) after entering, the heating channel (32) is divided into an inlet section (321) and a heating section (322). The inner diameter of the inlet section (321) is larger than the inner diameter of the heating section (322), and the length of the inlet section (321) is smaller than the length of the heating section (322). The length L of the heating section (322) is larger than the length S of the inlet section (321), and satisfies S<1 / 3L, so as to ensure that the heating section (322) can have an effective contact stroke with the wire (8) and achieve full melting of the wire (8).

2. The extrusion structure for a plastic molding equipment according to claim 1, characterized in that, The first extrusion fixture (11) is provided with a dual-channel feed port (111), which runs through the first extrusion fixture (11) from top to bottom. At the same time, the first extrusion fixture (11) is also provided with two sets of elongated through holes (112).

3. The extrusion structure for a plastic molding equipment according to claim 2, characterized in that, An adjusting stud (131) is provided in each of the two sets of elongated through holes (112). The bottom of the adjusting stud (131) is connected to the top of the extrusion connector (13). An adjusting nut (132) is threaded onto the adjusting stud (131). An adjusting spring (133) is fitted on the adjusting stud (131) below the adjusting nut (132). The adjusting spring (133) is located between the adjusting nut (132) and the elongated through hole (112) to ensure the stable upward pulling force of the adjusting stud (131) on the extrusion connector (13).

4. The extrusion structure for a plastic molding equipment according to claim 1, characterized in that, Two sets of clamping ring grooves (151) are provided on the auxiliary feeding wheel (15), and two sets of clamping tooth grooves (161) are provided on the active feeding wheel (16). The two sets of clamping ring grooves (151) provided on the auxiliary feeding wheel (15) and the two sets of clamping tooth grooves (161) provided on the active feeding wheel (16) are arranged in a corresponding direction. During operation, the filament (8) used for extrusion molding is located between the two sets of clamping ring grooves (151) and the two sets of clamping tooth grooves (161), and enters the heat dissipation component (2) under the rotation of the two sets of clamping tooth grooves (161).

5. The extrusion structure for a plastic molding equipment according to claim 4, characterized in that, To facilitate the replacement of different models of the active feeding wheel (16), an assembly hole (162) is provided in the center of the active feeding wheel (16), and a threaded locking hole (163) is provided on the lower side of the active feeding wheel (16) in a direction perpendicular to the assembly hole (162). The threaded locking hole (163) is connected to the assembly hole (162), and a locking screw is provided in the threaded locking hole (163). The active feeding wheel (16) is installed at the power output end of the feeding motor (17) through the assembly hole (162), and the active feeding wheel (16) is locked to the power output end of the feeding motor (17) by the locking screw.

6. The extrusion structure for a plastic molding equipment according to claim 1, characterized in that, The air-cooled shaping component (7) includes a fixed bracket (71), a cooler (72), and a guide (73). The fixed bracket (71) is an L-shaped frame structure. The fixed bracket (71) is installed on the lower two sides of the nozzle body (5) by bolts. The cooler (72) is installed on the upper part of the fixed bracket (71), and the guide (73) is installed on the lower part of the fixed bracket (71). The main air outlet (74) is opened in the lower part of the inner cavity of the guide (73), and the side air outlet (75) is processed on the side of the inner cavity of the guide (73). The side air outlet (75) is a slanted diamond structure so that the cooling air can be concentrated and flowed to the material discharge forming area of ​​the discharge nozzle (6) to achieve rapid material discharge forming and cooling.

7. The method of operating the extrusion structure for plastic molding equipment as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. The filament (8) is fed into the dual-channel feed port (111) opened on the first extrusion fixture (11) in the extrusion assembly (1). After entering, the filament (8) is between the auxiliary feeding wheel (15) and the active feeding wheel (16). One side of the filament (8) is in contact with the clamping ring groove (151) on the auxiliary feeding wheel (15), and the other side of the filament (8) is in contact with the clamping ring groove (151) on the active feeding wheel (16). S2. To ensure that the filament (8) has a stable contact friction between the auxiliary feeding wheel (15) and the active feeding wheel (16), the operator can adjust the rotating adjusting nut (132) to compress the adjusting spring (133). The adjusting spring (133) pushes the adjusting nut (132) to have an upward elastic force so as to realize the stable upward pulling force of the adjusting stud (131) on the extrusion connector (13). The extrusion connector (13) drives the auxiliary feeding wheel (15) to stably clamp the filament (8) between the auxiliary feeding wheel (15) and the active feeding wheel (16) to avoid the filament (8) slipping. S3. The wire (8) passes through the auxiliary feeding wheel (15) and the active feeding wheel (16) and enters the feed through hole (22) in the heat dissipation module (21), and passes through the opening section (221), the middle section (222) and the thickened section (223) in the feed through hole (22) in sequence. S4. After passing through the feed through hole (22), it enters the heating channel (32) in the heating block (31). The heating channel (32) is divided into an inlet section (321) and a heating section (322). In order to facilitate the entry of the filament (8) into the heating channel (32), the inner diameter of the inlet section (321) corresponds to the thickened section (223) in the heat dissipation module (21). S5. In order to facilitate the contact between the filament (8) and the heating channel (32) and achieve rapid melting, the inner diameter of the heating section (322) is smaller than the inner diameter of the inlet section (321), and the length L of the heating section (322) is greater than the length S of the inlet section (321), and S < 1 / 3L is satisfied. A threaded hole (323) communicating with the heating channel (32) is machined in the lower part of the heating block (31). The molten filament (8) converges at the threaded hole (323) and is finally extruded by the discharge nozzle (6) for plastic forming.

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