Injection molding device for processing a housing
By installing a sealed box and waste gas treatment and feeding components on the outside of the injection molding machine, the problems of exhaust diffusion and raw material drying in injection molding equipment are solved, achieving efficient waste gas purification and product quality improvement, and reducing maintenance difficulty.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI CHENFENG OCEAN TECH ENG CO LTD
- Filing Date
- 2026-01-19
- Publication Date
- 2026-06-16
AI Technical Summary
Existing injection molding equipment lacks an effective structure for exhaust treatment, leading to the diffusion of harmful gases. Furthermore, the rough drying process of raw materials can easily cause product quality problems. The filter element structure is difficult to disassemble and replace quickly, resulting in low maintenance efficiency.
A sealed box is installed outside the injection molding machine, and exhaust gas treatment components and feeding components are set up, including a sealing frame, filter element, and conical heating block, to realize directional exhaust gas flow and online drying of raw materials. The filter element can be replaced in seconds, and the sealing structure has high reliability.
It effectively reduces the leakage of harmful gases, improves the efficiency of waste gas purification, reduces downtime, ensures product quality stability and yield, and improves maintenance efficiency.
Smart Images
Figure CN224360563U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding equipment technology, specifically to an injection molding device for processing shells. Background Technology
[0002] During the injection molding process of shell-type products, the injection molding machine continuously generates waste gas containing odors, volatile organic compounds, and particulate impurities when the plastic slurry is molten at high temperatures. If not collected and treated in a timely manner, this waste gas will not only pollute the processing environment and affect the health of operators, but will also adhere to the inside of the equipment, negatively impacting the quality of the injection-molded products.
[0003] Patent CN220198458U discloses an injection molding device for processing the outer shell of a thermos bottle. The device includes a mounting platform, an injection molding box mounted on the top surface of the platform, a conveying chamber connected to the side of the injection molding box, a heating plate fixedly mounted on the outside of the conveying chamber, a material hopper fixedly connected to the top surface of the conveying chamber, a material pump mounted on the top surface of the material hopper, a conveying pipe fixedly connected to the input end of the material pump, a rotating motor mounted on the side of the conveying chamber, and a screw rod fixedly connected to the output end of the rotating motor. An injection molding machine is fixedly mounted inside the injection molding box, a telescopic cylinder is fixedly mounted on the outside of the injection molding box, a molding template is fixedly connected to the end of the injection molding machine, a mounting plate is fixedly connected to the output end of the telescopic cylinder, a mold closing template is fixedly mounted on the surface of the mounting plate, a support rod is fixedly mounted on the surface of the mounting plate, a mounting ring is fixedly mounted on the outside of the support rod, and a cooling fan is fixedly mounted on the inside of the mounting ring. This patent enables all-around cooling of the molded product, accelerating the cooling speed of the molded product.
[0004] As described above, most injection molding equipment currently only uses simple exhaust pipes at the nozzle or mold opening position of the injection molding machine for exhaust, lacking a proper treatment structure, which allows harmful gases to easily diffuse. At the same time, the drying process for raw plastic granules in existing injection molding production lines is also relatively crude, generally using external drying chambers for pretreatment. When the plastic raw material reabsorbs moisture during transportation, it may still carry a certain amount of moisture into the injection molding machine. High-humidity raw materials are prone to causing bubbles, silver streaks, and even affecting product strength and surface quality during injection molding. Furthermore, in exhaust gas filtration components, the common filter element structure is mostly fixed, making quick disassembly and replacement difficult, resulting in low maintenance efficiency. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides an injection molding device for shell processing, solving the problem of simple exhaust pipes at the mold opening position lacking proper treatment structures, which allows harmful gases to easily diffuse. Meanwhile, existing injection molding production lines also have relatively crude drying processes for raw plastic granules, generally using external drying ovens for pretreatment. When the plastic raw material reabsorbs moisture during transport, it may still carry a certain amount of moisture into the injection molding machine. High-humidity raw materials are prone to causing bubbles, silver streaks, and even affecting product strength and surface quality during injection molding. Furthermore, in exhaust gas filtration components, common filter element structures are mostly fixed, making quick disassembly and replacement difficult and resulting in low maintenance efficiency.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an injection molding device for processing outer shells, comprising:
[0007] The injection molding machine body has a sealed box fitted on its surface.
[0008] An exhaust gas treatment assembly, one side of which is fixedly connected to one side of a sealed box, is used to treat exhaust gas generated during the processing of the outer casing. The exhaust gas treatment assembly includes a sealing frame fixedly connected to one side of the injection molding machine body. Guide plates are fixedly connected to the top and bottom of the inner wall of the sealing frame. A filter element is movably connected to the surface of the guide plate. A handle is fixedly connected to one side of the filter element.
[0009] A feeding assembly, one side of which is connected to the top of the injection molding machine body, is used for processing raw materials during the outer shell processing.
[0010] Preferably, a sealing cover is movably connected to the surface of the sealing frame, and a baffle is fixedly connected to the bottom of the sealing frame.
[0011] Preferably, a pre-tensioning spring is fixedly connected to one side of the baffle, a sliding plate is fixedly connected to one end of the pre-tensioning spring, a connecting post is fixedly connected to one side of the sliding plate, and a closing plate is rotatably connected to one end of the connecting post.
[0012] Preferably, one side of the sealing frame is connected to a delivery pipe, and one side of the delivery pipe is connected to an air pump.
[0013] Preferably, the feeding assembly includes a feeding hopper communicating with the top of the injection molding machine body, and a support plate is fixedly connected to the inner wall of the feeding hopper.
[0014] Preferably, a conical heating block is fixedly connected to the top of the support plate, and a separation plate is fixedly connected to the surface of the conical heating block.
[0015] This invention provides an injection molding device for processing housings. Compared with the prior art, it has the following advantages:
[0016] 1. This injection molding device for casing processing, by installing a sealed box and exhaust gas treatment components outside the injection molding machine body, can completely confine the high-temperature harmful gases generated during the injection molding process inside the sealed frame. The exhaust gas is then drawn out by a delivery pipe and air pump, forming a directional flow path. The filter element is arranged between the guide plates, effectively preventing the filter element from shaking after installation, ensuring that the exhaust gas is filtered before being discharged, more effectively reducing the leakage of particulate matter and odor substances, and improving exhaust gas purification efficiency. A handle on one side of the filter element allows it to be quickly pulled out along the guide plate, achieving replacement in seconds, significantly improving maintenance efficiency and reducing downtime. Simultaneously, a baffle at the bottom of the sealed frame works in conjunction with a pre-tensioning spring. The pre-tensioning spring is maintained by a limiting retaining mechanism to prevent the loosening or strength decay problems of ordinary springs. This ensures that the baffle always provides a continuous and stable sealing thrust to the filter element and the sealed frame wall, thereby guaranteeing the sealing reliability of the filter assembly during long-term operation, reducing the risk of air leakage, and significantly improving the processing environment.
[0017] 2. The injection molding device used for shell processing features an online drying system for the injection molding raw materials, avoiding the secondary moisture absorption problem caused by the reliance on external drying chambers in traditional injection molding. A conical heating block is fixed to a support plate on the inner wall of the feed hopper. This conical structure naturally diverts aggregated particles as the raw material is poured in, guiding them down through smaller, independent channels, resulting in more uniform heating of the particles in each channel. The high-power, fast-response heating elements inside the heating block thoroughly dry the particles during their descent, effectively reducing moisture content. A separation plate further prevents raw material accumulation, increases the contact area between air and particles, and ensures more complete heating. Plastic particles treated by this structure have significantly reduced humidity when entering the injection molding cavity, significantly reducing defects such as bubbles, cracks, and silver streaks in the finished injection molded product, improving the strength and surface quality of the shell, and enhancing the stability and yield of the entire injection molding process. Attached Figure Description
[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;
[0019] Figure 2 This is a cross-sectional view of the present invention;
[0020] Figure 3 This utility model Figure 2 A magnified view of a section at point A in the middle;
[0021] Figure 4 This is a partial cross-sectional view of the waste gas treatment component of this utility model;
[0022] Figure 5This utility model Figure 4 A magnified view of a section at point B in the middle.
[0023] In the diagram: 1. Injection molding machine body; 2. Sealing box; 3. Exhaust gas treatment component; 31. Sealing frame; 32. Guide plate; 33. Filter element; 34. Handle; 35. Sealing cover; 36. Baffle; 37. Pre-tension spring; 38. Sliding plate; 39. Connecting column; 310. Closing plate; 311. Conveying pipe; 312. Air pump; 4. Feeding component; 41. Feed hopper; 42. Support plate; 43. Conical heating block; 44. Separation plate. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figures 1-5 This utility model provides two technical solutions:
[0026] Example 1: An injection molding apparatus for processing housings, comprising:
[0027] Injection molding machine body 1, with a sealed box 2 fitted on the surface of injection molding machine body 1;
[0028] The exhaust gas treatment component 3 is fixedly connected to one side of the sealing box 2. The exhaust gas treatment component 3 is used to treat the exhaust gas generated during the processing of the outer shell. The exhaust gas treatment component 3 includes a sealing frame 31 fixedly connected to one side of the injection molding machine body 1. The top and bottom of the inner wall of the sealing frame 31 are fixedly connected to the guide plate 32. The surface of the guide plate 32 is movably connected to the filter element 33. During operation, the two sides of the filter element 33 are in contact with the conveying pipe 311 and the inner wall of the sealing frame 31. A handle 34 is fixedly connected to one side of the filter element 33. By installing the sealing box 2 and the exhaust gas treatment component 3 outside the injection molding machine body 1, the high-temperature harmful gas generated during the injection molding process can be completely confined inside the sealing frame 31. Then, the exhaust gas is drawn out by the conveying pipe 311 and the air pump 312 to form a directional flow path. The filter element 33 is arranged between the guide plates 32, which effectively prevents the filter element 33 from shaking after installation, allowing the exhaust gas to be filtered before being discharged, thus more effectively reducing the leakage of particulate matter and odor substances and improving the exhaust gas purification efficiency. The handle on one side of the filter element 33 allows the filter element 33 to be quickly pulled out along the guide plate 32, achieving replacement in seconds, greatly improving maintenance efficiency and reducing downtime. At the same time, the baffle 36 at the bottom of the sealing frame 31 works in conjunction with the preload spring 37. The preload spring 37 is maintained by a limiting retention mechanism to maintain preload for a long time, avoiding the problems of relaxation or strength decay of ordinary springs. This ensures that the baffle always provides a continuous and stable sealing thrust to the filter element 33 and the wall of the sealing frame 31, thereby ensuring the sealing reliability of the filter assembly during long-term operation, reducing the risk of air leakage, and significantly improving the processing environment.
[0029] The feeding component 4 is connected to the top of the injection molding machine body 1 on one side. The feeding component 4 is used to process the raw materials during the shell processing.
[0030] Example 2 differs from Example 1 primarily in that it includes an injection molding device for processing a housing. A sealing cover 35 is movably connected to the surface of a sealing frame 31. A silicone sealing ring is provided on the inner wall of the sealing cover 35. A baffle 36 is fixedly connected to the bottom of the sealing frame 31. A preload spring 37 is fixedly connected to one side of the baffle 36. The preload spring 37 is equipped with a limit retaining mechanism, ensuring that the spring remains in a fixed preload state rather than being a freely extending spring. A sliding plate 38 is fixedly connected to one end of the preload spring 37. A connecting post 39 is fixedly connected to one side of the sliding plate 38. A closing plate 310 is rotatably connected to one end of the connecting post 39. One side of the sealing frame 31 is connected to a conveyor belt. The feeding pipe 311 has an air pump 312 connected to one side. The bottom of the air pump 312 is fixedly connected to the top of the injection molding machine body 1. The feeding assembly 4 includes a feeding hopper 41 connected to the top of the injection molding machine body 1. A support plate 42 is fixedly connected to the inner wall of the feeding hopper 41. A conical heating block 43 is fixedly connected to the top of the support plate 42. An electric heating element is installed on the inner wall of the conical heating block 43. The electric heating element principle includes, but is not limited to, PTC heating. A separation plate 44 is fixedly connected to the surface of the conical heating block 43. The feeding assembly 4 can realize online drying of injection molding raw materials, avoiding the secondary moisture absorption problem caused by the reliance on external drying boxes in traditional injection molding. The conical heating block 43 is fixed on the support plate on the inner wall of the feeding hopper 41. The conical structure can naturally divert the aggregated particles when the raw material is poured in, guiding the particles to fall along smaller independent channels, making the particles in each channel more evenly heated. The electric heating element installed inside the heating block has high power and fast response, which can fully dry the particles during the falling process and effectively reduce the moisture content. The separation plate 44 further prevents raw material accumulation, increases the contact area between air and particles, and allows for more complete heating. Plastic particles treated by this structure experience significantly reduced humidity upon entering the injection molding cavity, which can substantially reduce defects such as bubbles, cracks, and silver streaks in the injection molded product, improve the strength and surface quality of the outer shell, and enhance the stability and product yield of the entire injection molding process.
[0031] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
[0032] During operation, when the raw material is poured into the feed hopper 41, it falls to the top of the conical heating block 43. A large number of aggregated particles are split by the pointed conical heating block 43. The particles slide down through the diameter of the separation plate 44. During the slide, the plastic particles are dried and then enter the injection molding machine body 1. They are stably conveyed to the left. Then, the high-temperature molten plastic liquid is injected into the product. Harmful gases are generated during the injection molding process. The air pump 312 is turned on and the harmful gases in the sealed box 2 are extracted through the conveying pipe 311. The gases are then filtered through the filter element 33 and sent out. When maintaining the filter element 33, the closing plate 310 is pulled outward and the closing plate 310 on one side of the connecting column 39 is rotated. At the same time, the sliding plate 38 and the connecting column 39 are moved toward the position of the closing plate 310. The pre-tightening spring 37 is squeezed, and the sealing cover 35 is removed from the surface of the sealing frame 31. The handle 34 on the surface of the filter element 33 is pulled outward, and the filter element 33 is moved along the guide plate 32. The filter element 33 is taken out and replaced. The operation continues until the device is completely finished and the device is restored.
[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An injection molding apparatus for processing outer shells, characterized in that, include: The injection molding machine body (1) is covered with a sealing box (2). The exhaust gas treatment component (3) is fixedly connected to one side of the sealing box (2) on one side. The exhaust gas treatment component (3) is used to treat the exhaust gas generated during the processing of the outer shell. The exhaust gas treatment component (3) includes a sealing frame (31) fixedly connected to one side of the injection molding machine body (1). A guide plate (32) is fixedly connected to the top and bottom of the inner wall of the sealing frame (31). A filter element (33) is movably connected to the surface of the guide plate (32). A handle (34) is fixedly connected to one side of the filter element (33). The feeding assembly (4) is connected to the top of the injection molding machine body (1) on one side. The feeding assembly (4) is used to process the raw materials during the shell processing.
2. The injection molding apparatus for processing a housing according to claim 1, characterized in that: A sealing cover (35) is movably connected to the surface of the sealing frame (31), and a baffle (36) is fixedly connected to the bottom of the sealing frame (31).
3. The injection molding apparatus for processing a housing according to claim 2, characterized in that: A pre-tensioning spring (37) is fixedly connected to one side of the baffle (36), a sliding plate (38) is fixedly connected to one end of the pre-tensioning spring (37), a connecting post (39) is fixedly connected to one side of the sliding plate (38), and a closing plate (310) is rotatably connected to one end of the connecting post (39).
4. The injection molding apparatus for processing a housing according to claim 1, characterized in that: One side of the sealing frame (31) is connected to a delivery pipe (311), and one side of the delivery pipe (311) is connected to an air pump (312).
5. The injection molding apparatus for processing a housing according to claim 1, characterized in that: The feeding assembly (4) includes a feeding hopper (41) that communicates with the top of the injection molding machine body (1), and a support plate (42) is fixedly connected to the inner wall of the feeding hopper (41).
6. The injection molding apparatus for processing a housing according to claim 5, characterized in that: A conical heating block (43) is fixedly connected to the top of the support plate (42), and a separation plate (44) is fixedly connected to the surface of the conical heating block (43).