Material drying device for production of automotive trim injection molding parts and working method of material drying device

Abstract

The invention discloses a material drying device for production of automotive trim injection molded parts and a working method thereof, and relates to the technical field of injection molding process.The material drying device comprises a material drying equipment body, the material drying equipment body comprises a ceramic heat preservation inner cylinder, and a stirring assembly is installed in the ceramic heat preservation inner cylinder; a filtering assembly used for filtering injection molding raw materials is installed above the ceramic heat preservation inner barrel, a winnowing assembly is installed above the filtering assembly, a flow dividing box is arranged at one end of the winnowing assembly, one end of the flow dividing box is connected with an induced draft fan through an induced draft pipe, and a material storage box is installed below the flow dividing box. And one end of the induced draft fan is connected with an air heater through a hot air recovery pipe. The problems that when an existing material drying device is used, internal injection molding raw materials are prone to being stacked together, heating is uneven, the raw materials are prone to being doped and agglomerated, the follow-up injection molding effect is affected, hot air obtained after material drying is difficult to recycle, and cost expenditure is increased are solved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding technology, in particular to a material drying device for producing automobile interior injection molding parts and a working method thereof. Background Art

[0002] Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding machine drying is to dry plastic particles in the drying equipment. Its function is to dry the material before injection molding to effectively remove moisture from the material.

[0003] Announcement number: CN215150856U, named "A rapid drying device for injection molding machines", the interior of the drying box is provided with multiple air distribution pipes connected to the air distribution box, and multiple air outlet devices are provided on the air distribution pipes, and the air outlet devices include a support plate fixed to the inner tube wall of the blower, a spring is provided on the support plate, and the other end of the spring is connected to a sealing plate, and a discharge door is provided on the front of the drying box. By arranging multiple air distribution pipes distributed inside the drying box, the hot air generated by the heating device can be quickly sent to the interior of the drying box through air distribution pipes of different heights, thereby effectively increasing the uniformity of the drying, and by diverting the hot air through multiple air distribution pipes, the high temperature during local drying can be effectively reduced, and the integrity of the raw materials of the injection molding machine can be increased.

[0004] When the above-mentioned existing drying device is in use, the injection molding raw materials inside are easily stacked together, resulting in uneven heating, which makes it easy for the raw materials to be mixed and agglomerated, affecting the subsequent injection molding effect. In addition, the hot air after drying is difficult to recycle, increasing the cost. Therefore, a drying device for the production of automotive interior injection molding parts and a working method thereof are provided. Summary of the invention

[0005] The object of the present invention is to provide a drying device and a working method for the production of automobile interior injection molded parts, so as to solve the problem that when the existing drying device proposed in the above background technology is in use, the injection molding raw materials inside are easily stacked together, resulting in uneven heating, making it easy for the raw materials to be mixed and agglomerated, affecting the subsequent injection molding effect, and the hot air after drying is difficult to recycle, increasing cost expenditure.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a material drying device for the production of automotive interior injection molding parts, comprising a material drying equipment main body, the material drying equipment main body comprising a ceramic insulation inner cylinder, a stirring assembly is installed inside the ceramic insulation inner cylinder, a filter assembly for filtering injection molding raw materials is installed above the ceramic insulation inner cylinder, a wind selection assembly is installed above the filter assembly, a diverter box is provided at one end of the wind selection assembly, one end of the diverter box is connected to an induced draft fan through an induced draft pipe, a storage box is installed below the diverter box, one end of the induced draft fan is connected to a hot air blower through a hot air recovery pipe, the air outlet of the hot air blower is connected to the ceramic insulation inner cylinder through a feed pipe, and a feed hopper is installed above the feed pipe.

[0007] Preferably, the stirring assembly includes a driving motor installed at the bottom of the ceramic insulation inner cylinder, the output end of the driving motor is provided with a stirring shaft extending into the cylinder, a plurality of stirring blades are annularly spaced on the outer wall of the stirring shaft, and the stirring blades are installed in multiple layers.

[0008] Preferably, a scooping slope is provided on one side of the stirring blade, and a sliding slope is provided on the other side of the stirring blade.

[0009] Preferably, the filter assembly comprises a grid, and a screen is installed at the middle position of the grid.

[0010] Preferably, the air separation component comprises a traction air hood, a first control valve is installed at the upper end of the traction air hood, and an air separation conveying pipe is installed at the upper end of the first control valve.

[0011] Preferably, a second control valve is installed above the material storage box, and a material drop channel is opened inside the diverter box, and both ends of the material drop channel are respectively connected to the air separation conveying pipe and the second control valve.

[0012] Preferably, brackets are installed at both upper and lower ends of one side of the material dropping channel, a diversion port is opened in the middle position of the bracket, a material blocking net is installed inside the diversion port, and a pull hook extending to the outside of the box is installed at the upper end of the material blocking net.

[0013] Preferably, a block matching the slot of the bracket is provided at the lower end of the material retaining net, and a guiding slope inclined toward the material dropping channel is provided on the outer wall of the bracket below.

[0014] Preferably, the ceramic heat-insulating inner cylinder is sheathed with a ceramic heat-insulating outer cylinder.

[0015] Preferably, a working method of a baking device for producing automotive interior injection molded parts comprises the following steps: Step 1: The hot air blower heats the external gas, and the injection molding raw materials are fed into the feed hopper. The injection molding raw materials are pushed forward in the feed pipe by the hot gas, and the hot gas and the raw materials are fed into the ceramic insulation inner cylinder together; Step 2: Turn on the drive motor to drive the stirring shaft and the stirring blade to rotate. During the rotation process, the shoveling slope of the stirring blade turns over the injection molding materials in the barrel, and some of the injection molding materials are turned over briefly, and other parts of the materials slide down through the sliding slope. The internal stirring process is mixed with the hot air sent in, which dries the raw materials. Some agglomerated materials are broken by the stirring force and the impact force of the turning; Step 3: Turn on the induced draft fan to draw the gas outward. The weight of the particles after drying and crushing decreases. As the gas rises to the screen, some of the larger particles are blocked by the screen, while the particles smaller than the through hole continue to rise and enter the diversion box through the air separation conveying pipe; Step 4: The gas and particles entering the diversion box are pulled to the material blocking net, and the gas passes through the material blocking net, while the particles stay in front of the material blocking net. After the induced draft fan has been pulled for a period of time, the induced draft fan is turned off, so that the particles in front of the material blocking net fall into the material dropping channel due to lack of traction, and fall into the storage box through the second control valve for storage. The waste heat gas enters the hot air blower through the hot gas recovery pipe, and the waste heat is utilized at the hot air blower.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the raw materials are sent into the barrel together with hot air through a hot air blower, which not only can transport the raw materials, but also can dry the raw materials during the transportation process. After being sent into the barrel, the raw materials are stirred, crushed and turned over by a stirring component, and the hot air and particles in the barrel are pulled upward by an induced draft fan, and the pulled particles are filtered and screened by a filtering component. The screened particles enter the diversion box with the hot air for diversion, and the gas passes through the material blocking net, while the particles stay in front of the material blocking net. After the induced draft fan has been pulled for a period of time, the induced draft fan is turned off, so that the particles in front of the material blocking net fall into the falling channel due to lack of traction, thereby finally realizing the diversion operation of hot air and particles, and the hot air enters the hot air recovery pipe into the hot air blower for secondary utilization, thereby reducing cost expenditure.

[0017] The stirring shaft and the stirring blades are driven to rotate by a driving motor. During the stirring process, on the one hand, the agglomerated raw materials can be broken up, and on the other hand, the raw materials can be turned over to prevent them from piling up, thereby making the raw materials heated more evenly. The stirring blades adopt an upper and lower multi-layer and annular distribution structure, which can effectively expand the stirring range and improve the turning effect. At the same time, the shoveling slope arranged at the stirring blades has a large inclination angle inclined to the upper end, which can shovel the raw material particles so that the raw material particles rise to the top along the shoveling slope and are finally turned over. The turned over raw materials are more easily in contact with the internal hot air, thereby improving the baking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the main structure of the baking equipment of the present invention; Figure 3 It is a schematic diagram of the structure of the air selection component of the present invention; Figure 4 It is a schematic diagram of the structure of the stirring assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the filter assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the diverter box of the present invention; In the figure: 1. Main body of drying equipment; 101. Ceramic insulation outer cylinder; 102. Ceramic insulation inner cylinder; 2. Stirring assembly; 201. Driving motor; 202. Stirring shaft; 203. Stirring blade; 2031. Shoveling slope; 2032. Downward slope; 3. Air separation assembly; 301. Traction hood; 302. Air separation conveying pipe; 303. First control valve; 4. Diverter box; 401. Dropping channel; 402. Diverter port; 403. Bracket; 404. Material blocking net; 405. Draw hook; 406. Guide slope; 407. Block; 5. Storage box; 501. Second control valve; 6. Induced draft fan; 601. Induced draft pipe; 602. Hot air recovery pipe; 7. Hot air blower; 701. Feed pipe; 702. Feed hopper; 8. Filter assembly; 801. Grid; 802. Screen. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1-6 The present invention provides an embodiment: a material drying device for producing automotive interior injection molding parts, comprising a material drying device body 1, the material drying device body 1 comprising a ceramic heat-insulating inner cylinder 102, the outer portion of the ceramic heat-insulating inner cylinder 102 is provided with a ceramic heat-insulating outer cylinder 101; using ceramic as the cylinder material can improve its own heat-insulating performance, making it more difficult to dissipate internal heat, achieving a heat-insulating effect, and reducing cost expenditure; A stirring assembly 2 is installed inside the ceramic heat-insulating inner cylinder 102, a filter assembly 8 for filtering injection molding raw materials is installed above the ceramic heat-insulating inner cylinder 102, a wind selection assembly 3 is installed above the filter assembly 8, a diverter box 4 is provided at one end of the wind selection assembly 3, one end of the diverter box 4 is connected to an induced draft fan 6 through an induced draft pipe 601, a storage box 5 is installed below the diverter box 4, one end of the induced draft fan 6 is connected to a hot air blower 7 through a hot air recovery pipe 602, an air outlet of the hot air blower 7 is connected to the ceramic heat-insulating inner cylinder 102 through a feed pipe 701, a feed hopper 702 is installed above the feed pipe 701, a second control valve 501 is installed above the storage box 5, a blanking channel 401 is provided inside the diverter box 4, and both ends of the blanking channel 401 are respectively connected to the wind selection conveying pipe 302 and the second control valve 501; The drying device delivers the raw materials and hot air into the barrel together through the hot air blower 7, which can not only transport the raw materials, but also dry the raw materials during the transportation process. After being sent into the barrel, the stirring component 2 is used for stirring, crushing and turning, and the hot air and particles in the barrel are pulled upward by the induced draft fan 6, and the pulled particles are filtered and screened by the filtering component 8. The screened particles enter the diversion box 4 with the hot air for diversion, and the gas passes through the material blocking net 404, while the particles stay in front of the material blocking net 404. After the induced draft fan 6 has been pulled for a period of time, the induced draft fan 6 is turned off, so that the particles in front of the material blocking net 404 fall into the dropping channel 401 due to the lack of traction, and finally the diversion operation of hot air and particles is realized, and the hot air enters the hot air recovery pipe 602 into the hot air blower 7 for secondary utilization.

[0021] The stirring assembly 2 includes a driving motor 201 installed at the bottom of the ceramic heat-insulating inner cylinder 102, and the output end of the driving motor 201 is provided with a stirring shaft 202 extending into the cylinder, and a plurality of stirring blades 203 are arranged on the outer wall of the stirring shaft 202 in an annular distribution, and the stirring blades 203 are installed with multiple layers up and down, and a shoveling inclined surface 2031 is provided on one side of the stirring blade 203, and a downward sliding inclined surface 2032 is provided on the other side of the stirring blade 203; The stirring shaft 202 and the stirring blade 203 are driven to rotate by the driving motor 201. During the stirring process, on the one hand, the lumped raw materials can be broken up, and on the other hand, the raw materials can be turned over to prevent the raw materials from piling up, thereby making the raw materials more evenly heated. The stirring blade 203 adopts an upper and lower multi-layer and annular distribution structure, which can effectively expand the stirring range and improve the turning effect. At the same time, the shoveling slope 2031 arranged at the stirring blade 203 is a large inclination angle inclined to the upper end, which can shovel the raw material particles so that the raw material particles rise to the top along the shoveling slope 2031 and are finally turned over. The turned over raw materials are easier to fully contact with the internal hot air, thereby improving the baking effect. In addition, the turned over raw materials are easier to be pulled to the top by the induced draft fan 6 for air selection and discharge operation. The setting of the sliding slope 2032 allows the raw material particles at the stirring blade 203 to slide down along its slope.

[0022] See also Figure 5 The filter assembly 8 includes a grid 801, a screen 802 is installed at the middle position of the grid 801, and the wind selection assembly 3 includes a traction hood 301, a first control valve 303 is installed at the upper end of the traction hood 301, and a wind selection conveying pipe 302 is installed at the upper end of the first control valve 303; When the induced draft fan 6 is pulling, the internal raw material particles are screened by the setting of the screen 802, and the small-volume particles and hot air pass upward through the through holes of the screen 802 into the air separation conveying pipe 302. After the induced draft fan 6 stops, the large-volume particles will fall from the screen 802 into the cylinder, and will be stirred and crushed again by the stirring component 2. The setting of the traction wind hood 301 can concentrate the wind force and improve the wind traction effect. The setting of the first control valve 303 can control the pipeline connection state between the traction wind hood 301 and the air separation conveying pipe 302; See also Figure 6 , brackets 403 are installed at both upper and lower ends of one side of the blanking channel 401, a diversion port 402 is opened in the middle of the bracket 403, a material blocking net 404 is installed inside the diversion port 402, a hook 405 extending to the outside of the box is installed at the upper end of the material blocking net 404, a block 407 matching the slot of the bracket 403 is provided at the lower end of the material blocking net 404, and a guiding inclined surface 406 inclined toward the blanking channel 401 is provided on the outer wall of the lower bracket 403; The gas and particles entering the diversion box 4 are drawn to the material blocking net 404, and the gas passes through the material blocking net 404, while the particles stay in front of the material blocking net 404. After the induced draft fan 6 has been pulling for a period of time, the induced draft fan 6 is turned off, so that the particles in front of the material blocking net 404 fall into the material dropping channel 401 due to the lack of traction, thereby achieving the diversion effect. The setting of the guide slope 406 can guide the particles therein along the slope to the material dropping channel 401, so that it is not easy for particles to accumulate therein, which is convenient for collecting the dropped materials. After using it for a period of time, the material blocking net 404 is pulled outward by the pull hook 405, and it is taken out for cleaning and replacement, and then the material blocking net 404 is inserted again from the pulled-out position, so that the block 407 at the lower end of the material blocking net 404 is inserted into the slot of the lower bracket 403, and they are combined for easy operation by users.

[0023] See also Figure 1-6 , a working method of a baking device for producing automobile interior injection molded parts, comprising the following steps: Step 1: The hot air blower 7 heats the external air, and the injection molding raw material is fed into the feed hopper 702. The injection molding raw material is pushed forward in the feed pipe 701 by the hot air, and the hot air and the raw material are fed into the ceramic heat-insulating inner cylinder 102 together; Step 2: Turn on the driving motor 201 to drive the stirring shaft 202 and the stirring blade 203 to rotate. During the rotation, the shoveling inclined surface 2031 of the stirring blade 203 turns over the injection molding raw materials in the barrel, and part of the injection molding raw materials are turned over briefly, and the other part of the raw materials slides down through the sliding inclined surface 2032. During the internal stirring process, the hot air is mixed to dry the raw materials, and some agglomerated raw materials are broken by the stirring force and the impact force of the turning; Step 3: Turn on the induced draft fan 6 to draw the gas outward, and the weight of the particles after drying and crushing decreases. As the gas rises to the screen 802, some of the larger particles are blocked by the screen 802, and the particles smaller than the through hole continue to rise and enter the diversion box 4 through the air selection conveying pipe 302; Step 4: The gas and particles entering the diversion box 4 are pulled to the material blocking net 404, the gas passes through the material blocking net 404, and the particles stay in front of the material blocking net 404. After the induced draft fan 6 has been pulled for a period of time, the induced draft fan 6 is turned off, so that the particles in front of the material blocking net 404 fall into the material dropping channel 401 due to the lack of traction, and fall into the storage box 5 through the second control valve 501 for storage, and the waste heat gas enters the hot air blower 7 through the hot gas recovery pipe 602, and the waste heat is utilized at the hot air blower 7.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A material drying device for producing automobile interior injection molded parts, comprising a material drying device body (1), characterized in that: The material drying equipment body (1) comprises a ceramic heat-insulating inner cylinder (102), a stirring assembly (2) is installed inside the ceramic heat-insulating inner cylinder (102), a filtering assembly (8) for filtering injection molding raw materials is installed above the ceramic heat-insulating inner cylinder (102), a wind selection assembly (3) is installed above the filtering assembly (8), a diverter box (4) is arranged at one end of the wind selection assembly (3), one end of the diverter box (4) is connected to an induced draft fan (6) via an induced draft pipe (601), a material storage box (5) is installed below the diverter box (4), one end of the induced draft fan (6) is connected to a hot air blower (7) via a hot air recovery pipe (602), an air outlet of the hot air blower (7) is connected to the ceramic heat-insulating inner cylinder (102) via a feed pipe (701), and a feed hopper (702) is installed above the feed pipe (701).

2. The material drying device for producing automobile interior injection molded parts according to claim 1, characterized in that: The stirring assembly (2) comprises a driving motor (201) installed at the bottom of the ceramic heat-insulating inner cylinder (102); the output end of the driving motor (201) is provided with a stirring shaft (202) extending into the cylinder; a plurality of stirring blades (203) are arranged at intervals in an annular pattern on the outer wall of the stirring shaft (202); and the stirring blades (203) are installed in multiple layers from top to bottom.

3. The material drying device for producing automobile interior injection molded parts according to claim 2, characterized in that: A material shoveling slope (2031) is provided on one side of the stirring blade (203), and a sliding downward slope (2032) is provided on the other side of the stirring blade (203).

4. The material drying device for producing automobile interior injection molded parts according to claim 3, characterized in that: The filtering assembly (8) comprises a mesh frame (801), and a screen (802) is installed at the middle position of the mesh frame (801).

5. The material drying device for producing automobile interior injection molded parts according to claim 4, characterized in that: The wind selection component (3) comprises a traction wind hood (301), a first control valve (303) is installed at the upper end of the traction wind hood (301), and a wind selection conveying pipe (302) is installed at the upper end of the first control valve (303).

6. The material drying device for producing automobile interior injection molded parts according to claim 5, characterized in that: A second control valve (501) is installed above the material storage box (5), and a material drop channel (401) is provided inside the diverter box (4), with both ends of the material drop channel (401) being connected to the air selection conveying pipe (302) and the second control valve (501) respectively.

7. The material drying device for producing automobile interior injection molded parts according to claim 6, characterized in that: Brackets (403) are installed at both upper and lower ends of one side of the material dropping channel (401), a diversion port (402) is provided in the middle of the bracket (403), a material blocking net (404) is installed inside the diversion port (402), and a draw hook (405) extending to the outside of the box is installed at the upper end of the material blocking net (404).

8. The material drying device for producing automobile interior injection molded parts according to claim 7, characterized in that: A block (407) matching the slot of the bracket (403) is provided at the lower end of the material blocking net (404), and a guide slope (406) inclined toward the material dropping channel (401) is provided on the outer wall of the bracket (403) below.

9. A material drying device for producing automobile interior injection molded parts according to claim 8, characterized in that: The ceramic heat-insulating inner cylinder (102) is sheathed with a ceramic heat-insulating outer cylinder (101).

10. A working method of a material drying device for producing automobile interior injection molded parts, which is realized based on the material drying device for producing automobile interior injection molded parts according to claim 9, characterized in that: The following steps are involved: Step 1: The hot air blower (7) heats the external air, and the injection molding raw material is fed into the feed hopper (702). The injection molding raw material is pushed forward in the feed pipe (701) by the hot air, and the hot air and the raw material are fed into the ceramic heat-insulating inner cylinder (102); Step 2: Turn on the driving motor (201) to drive the stirring shaft (202) and the stirring blade (203) to rotate. During the rotation process, the shoveling inclined surface (2031) of the stirring blade (203) turns over the injection molding raw materials in the barrel, so that part of the injection molding raw materials are turned over briefly, and other part of the raw materials slide down the sliding inclined surface (2032). During the internal stirring process, the hot air is mixed to dry the raw materials, and some agglomerated raw materials are broken by the stirring force and the impact force of the turning; Step 3: Turn on the induced draft fan (6) to draw air outward, so that the weight of the particles after drying and crushing decreases. As the gas rises to the screen (802), some of the particles with larger volumes are blocked by the screen (802), while particles with volumes smaller than the through holes continue to rise and enter the diversion box (4) through the air selection conveying pipe (302); Step 4: The gas and particles entering the diversion box (4) are pulled to the material blocking net (404), and the gas passes through the material blocking net (404), while the particles stay in front of the material blocking net (404). After the induced draft fan (6) has been pulled for a period of time, the induced draft fan (6) is turned off, so that the particles in front of the material blocking net (404) fall into the material dropping channel (401) due to the lack of traction, and fall into the storage box (5) through the second control valve (501) for storage. The waste heat gas enters the hot air blower (7) through the hot gas recovery pipe (602), and the waste heat is utilized at the hot air blower (7).

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