Injection molding apparatus with exhaust gas pretreatment purification mechanism

Abstract

This invention relates to the field of waste gas treatment technology, and in particular to an injection molding equipment with a waste gas pretreatment and purification mechanism. The equipment includes an injection molding equipment body, a pretreatment tank on one side of the body, a dust removal and purification component inside the pretreatment tank, and a liquid storage tank fixedly connected to the bottom of the pretreatment tank. The liquid storage tank also contains an agitator. During the extraction of injection molding waste gas, the invention utilizes the rotation of a rotating rod to drive multiple dust removal filter plates to alternately circulate, ensuring continuous and efficient interception of large particulate impurities during filtration, thus avoiding increased cooling water replacement frequency. Furthermore, the agitator works in conjunction with the stirring blades on the rotating rod to eliminate large air bubbles, promote the dissolution of small particulate impurities, and extend the residence time of the waste gas in the cooling water, thereby improving the removal effect on small particulate impurities. Additionally, during the purified discharge, impurities on the dust removal filter plates are simultaneously backflushed, cleaned, and collected.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to an injection molding equipment with a waste gas pretreatment and purification mechanism. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection machines, are the main molding equipment used to make various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. During the injection molding process, the harmful substances generated by heating the raw materials mainly include various small solid particles, nitrogen oxides, sulfides and other harmful substances.

[0003] For example, in the prior art, there is an injection molding machine with exhaust gas collection, disclosed in CN218083853U. Although this exhaust gas collection mechanism can achieve dust removal and purification of exhaust gas, the following problems still exist in the purification process:

[0004] (1) There is a significant lack of pretreatment and filtration of large particulate impurities. The waste gas is dissolved and removed by cooling water alone. This results in the waste gas entering the cooling water system directly without effective pretreatment. This leads to a large number of large particulate impurities accumulating rapidly in the water, accelerating the pollution rate of the cooling water, and forcing frequent replacement of the cooling water to maintain the purification effect. This reduces the overall treatment efficiency and continuity of the waste gas purification.

[0005] (2) Although it is equipped with stirring blades to optimize the contact effect between cooling water and exhaust gas and avoid the formation of large bubbles, it is not possible to better contact the exhaust gas in the small bubbles with the cooling water after the large bubbles are punctured, which limits the effective dissolution and removal of some small particulate impurities, thus affecting the overall effect of cooling adsorption filtration.

[0006] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0007] The purpose of this invention is to provide an injection molding equipment with a waste gas pretreatment and purification mechanism to solve the aforementioned technical defects. During the extraction of injection molding waste gas, this invention, by means of the rotation of a rotating rod, not only drives multiple dust removal filter plates to be used alternately and cyclically, ensuring continuous and efficient interception of large particulate impurities during the filtration process and avoiding increasing the frequency of cooling water replacement; it also enables the stirring component to cooperate with the stirring blades on the rotating rod to eliminate the generation of large bubbles and promote the dissolution of small particulate impurities, as well as prolong the residence time of waste gas in the cooling water, thereby improving the removal effect of small particulate impurities. In addition, during the purification and discharge process, impurities on the dust removal filter plates can be backflushed, cleaned, and collected simultaneously.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] An injection molding equipment with a waste gas pretreatment and purification mechanism includes an injection molding equipment body, a pretreatment tank is provided on one side of the injection molding equipment body, and a tank cover is bolted to the top of the pretreatment tank. A dust suction pipe is fixedly connected between the tank cover and the injection molding equipment body.

[0010] The pretreatment tank is equipped with a dust removal and purification assembly, which includes a rotating cylinder rotatably installed at the bottom of the pretreatment tank. Multiple dust removal filter plates are equidistantly installed on the annular sidewall of the rotating cylinder. The rotating cylinder is equipped with a purification chamber that is fixedly connected to the tank cover.

[0011] The bottom of the pretreatment tank is fixedly connected to a storage tank, and the storage tank is equipped with an agitation component. The agitation component includes a barrier fixing frame fixedly connected inside the storage tank. A connecting frame is provided above the barrier fixing frame, and a barrier block is fixedly connected to the bottom of the connecting frame at the gap of the barrier fixing frame.

[0012] Preferably, the top of the rotating cylinder is provided with an installation groove that matches the corresponding dust removal filter plate, and the annular outer wall of the rotating cylinder is provided with a flow groove that communicates with the corresponding installation groove. The bottom of the can cover is rotatably connected to an auxiliary rotating seat that abuts against the dust removal filter plate and the rotating cylinder.

[0013] Preferably, a connecting pipe is fixedly connected to one side of the outer wall of the pretreatment tank, and the closed end of the connecting pipe extends through into the interior of the storage tank and is located below the barrier fixing frame. Several air vents are opened on the connecting pipe and inside the storage tank, and an exhaust fan is fixedly installed on the connecting pipe.

[0014] Preferably, an exhaust pipe is provided on the side of the pretreatment tank away from the connecting pipe, and the air inlet end of the exhaust pipe extends through into the interior of the storage tank and is located above the barrier fixing frame. Multiple diversion pipes are fixedly connected between the exhaust pipe and the pretreatment tank, and an exhaust fan is fixedly installed on the exhaust pipe.

[0015] Preferably, the purification chamber has a collection chamber inside, and a barrier filter plate is fixedly connected inside the collection chamber. A vibrator is fixedly installed at the bottom of the barrier filter plate. An air inlet is opened at the bottom of the collection chamber on the side near the exhaust pipe, and a dust-proof cloth curtain is fixedly connected to the top of the air inlet.

[0016] Preferably, the top of the purification chamber is threadedly connected to an exhaust pipe that communicates with the collection chamber, and a barrier mesh is fixedly connected to the bottom of the exhaust pipe. Activated carbon is filled in the collection chamber at the top of the barrier filter plate.

[0017] Preferably, the two sides of the purification chamber are symmetrically fixedly connected with arc-shaped baffles, and the inner sidewall of the rotating cylinder and the periphery of each flow channel are fixedly embedded with sealing gaskets, and the sealing gaskets are slidably connected to the purification chamber and the arc-shaped baffles.

[0018] Preferably, the bottom of the storage tank is rotatably connected to multiple rotating rods, and the top of the rotating rods extends movably into the pretreatment tank and is fixedly connected to gears. An external gear ring that meshes with multiple gears is fixedly connected to the rotating cylinder. A stirring blade is fixedly connected to the rotating rod and located below the barrier fixing frame. A motor for driving the corresponding rotating rod to rotate is bolted to the bottom of the storage tank.

[0019] Preferably, the inner sidewall of the liquid storage tank is provided with a movable groove that communicates with the pretreatment tank between two adjacent sets of rotating rods. An L-shaped plate that is fixedly connected to the connecting frame is slidably connected in the movable groove. An annular cam groove is provided on the annular sidewall of the rotating cylinder. A guide pin that matches the annular cam groove is fixedly connected to the L-shaped plate.

[0020] The beneficial effects of this invention are as follows:

[0021] (1) In the process of extracting and purifying the waste gas generated by the injection molding equipment body during the injection molding process, the present invention first drives the dust removal filter plates to rotate sequentially to the air inlet end of the connecting pipe through the rotating drum, so as to realize the alternating blocking of large particulate impurities, ensuring the continuous high efficiency of the filtration process and effectively avoiding the clogging problem caused by long-term use of a single filter plate; then, the cooling water in the storage tank is used for secondary cooling adsorption filtration treatment, which not only removes small particulate impurities in the waste gas, but also avoids too many large particulate impurities dissolving in the cooling water, thereby increasing the frequency of cooling water replacement and reducing the waste gas treatment efficiency; finally, the activated carbon filled in the purification chamber is used for tertiary adsorption purification treatment of the waste gas, which greatly reduces the pollutant content in the emitted waste gas.

[0022] (2) By means of the rapid rotation of the rotating rod, the present invention can not only drive the rotating cylinder to rotate at a reduced speed, so as to realize the alternating use of multiple dust removal filter plates, but also drive the stirring blade to stir the cooling water, thereby eliminating large bubbles and promoting the dissolution of small particulate impurities, thus improving the secondary filtration effect. In addition, by means of the rotation of the rotating cylinder, the L-shaped plate carrying the blocking block moves back and forth, and by intermittently inserting multiple blocking blocks into the gaps on the blocking fixing frame, the residence time of the exhaust gas in the cooling water is further extended and the bubble volume is reduced, thus significantly improving the removal effect of small particulate impurities.

[0023] (3) During the purification and discharge process of the exhaust gas after secondary treatment, the exhaust gas flow rate is increased by the help of the exhaust fan. This not only ensures the purification rate during the exhaust gas purification process, but also combines with the rotating drum and the vibrating barrier filter plate to back-blown clean the dust removal filter plate, thereby effectively removing and collecting large particulate impurities on the dust removal filter plate. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings;

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram showing the connection between the pretreatment tank and the storage tank of the present invention;

[0027] Figure 3 This is a cross-sectional schematic diagram of the pretreatment tank and the storage tank of the present invention;

[0028] Figure 4 This is a schematic diagram showing the interaction between the stirring component of the present invention and the pretreatment tank and the storage tank;

[0029] Figure 5 This is a schematic diagram of the cooperation between the rotating cylinder and the purification chamber of the present invention;

[0030] Figure 6 This is a schematic diagram of the cooperation between the rotating cylinder and the stirring component of the present invention;

[0031] Figure 7 This is a schematic diagram of the purification chamber of the present invention;

[0032] Figure 8 This is a schematic diagram of the barrier fixing plate of the present invention;

[0033] Figure 9 This is a schematic diagram of the agitation component of the present invention.

[0034] Legend:

[0035] 1. Injection molding equipment body;

[0036] 2. Pretreatment tank; 21. Tank lid; 22. Dust suction pipe; 23. Auxiliary rotating seat; 24. Connecting pipe; 25. Exhaust fan one; 26. Exhaust duct; 27. Diverter pipe; 28. Exhaust fan two;

[0037] 3. Dust removal and purification components; 31. Rotating drum; 32. Dust removal filter plate; 33. Purification chamber; 34. Mounting groove; 35. Flow groove; 36. Collection chamber; 37. Barrier filter plate; 38. Vibrator; 39. Dustproof curtain; 310. Exhaust pipe; 311. Arc-shaped baffle; 312. External toothed ring; 313. Annular cam groove;

[0038] 4. Storage tank; 41. Rotating rod; 42. Gear; 43. Stirring blade; 44. Motor; 45. Movable trough;

[0039] 5. Agitator assembly; 51. Barrier fixing frame; 52. Connecting frame; 53. Barrier block; 54. L-shaped plate; 55. Guide pin. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1: Please refer to Figures 1-7 As shown, the lack of a pretreatment filtration stage for large particulate impurities in existing technologies leads to the rapid accumulation of large particulate impurities in the water, accelerating the contamination rate of the cooling water and forcing frequent cooling water replacements, thus reducing the efficiency of exhaust gas purification. This problem can be solved by the following solution:

[0042] This embodiment of an injection molding equipment with a waste gas pretreatment and purification mechanism includes an injection molding equipment body 1, a pretreatment tank 2 is provided on one side of the injection molding equipment body 1, and a tank cover 21 is bolted to the top of the pretreatment tank 2. The pretreatment tank 2 is used to pre-filter large particulate impurities in the waste gas generated during the injection molding process of the injection molding equipment body 1, so as to avoid a large number of large particulate impurities from accumulating rapidly in the water, thereby accelerating the pollution of the cooling water. A dust suction pipe 22 is fixedly connected between the tank cover 21 and the injection molding equipment body 1. The suction end of the dust suction pipe 22 is connected to the waste gas collection hood of the injection molding equipment body 1 for comprehensive extraction and purification of the waste gas.

[0043] The pretreatment tank 2 is equipped with a dust removal and purification component 3. The dust removal and purification component 3 includes a rotating cylinder 31 rotatably installed at the bottom of the pretreatment tank 2. Multiple dust removal filter plates 32 are equidistantly installed on the annular side wall of the rotating cylinder 31. The exhaust gas generated by the injection molding equipment body 1 during the injection molding process is extracted through the dust suction pipe 22. Combined with the rotating cylinder 31, the multiple dust removal filter plates 32 are rotated sequentially to the air inlet end of the connecting pipe 24 to achieve the sequential blocking and filtration of large particulate impurities, ensuring continuous high efficiency in the filtration process and effectively avoiding the clogging problem caused by long-term use of a single filter plate. The rotating cylinder 31 is equipped with a purification chamber 33 fixedly connected to the tank cover 21 for adsorbing, purifying and discharging exhaust gas.

[0044] The bottom of the pretreatment tank 2 is fixedly connected to the liquid storage tank 4 for storing cooling water. The top of one side of the liquid storage tank 4 is fixedly connected to the liquid injection pipe, and the liquid injection pipe is fixedly equipped with a liquid injection valve for injecting cooling water and preventing the exhaust gas from being discharged through the liquid injection pipe. The bottom of the liquid storage tank 4 is fixedly connected to the liquid drain pipe, and the liquid drain pipe is fixedly equipped with a liquid drain valve for discharging and replacing turbid cooling water, or for collecting the solution of chemical reaction of harmful substances in the exhaust gas through the liquid storage tank 4 to improve the quality of cooling filtration.

[0045] Furthermore, the storage tank 4 is equipped with an agitation component 5. The agitation component 5 includes a barrier fixing frame 51 fixedly connected inside the storage tank 4. A connecting frame 52 is provided above the barrier fixing frame 51, and a barrier block 53 is fixedly connected to the bottom of the connecting frame 52 at the gap of the barrier fixing frame 51.

[0046] The top of the rotating cylinder 31 is provided with an installation groove 34 that matches the corresponding dust removal filter plate 32. The cross-section of the dust removal filter plate 32 is L-shaped, which allows the damaged dust removal filter plate 32 to be replaced after the tank cover 21 is separated from the pretreatment tank 2. A flow groove 35 that communicates with the corresponding installation groove 34 is provided through the annular outer wall of the rotating cylinder 31. The flow groove 35 is used to discharge the extracted waste gas. The dust removal filter plate 32 is provided with a sealing gasket that slides and connects with the installation groove 34 to increase the sealing between the dust removal filter plate 32 and the installation groove 34, and to ensure effective filtration of large particulate impurities in the waste gas.

[0047] The bottom of the can lid 21 is rotatably connected to an auxiliary rotating seat 23 that abuts against the dust filter plate 32 and the rotating cylinder 31. The auxiliary rotating seat 23 ensures that the dust filter plate 32 is installed synchronously after the can lid 21 is installed, without interfering with the rotation of the rotating cylinder 31. In addition, a sealing gasket that abuts against the dust filter plate 32 and the rotating cylinder 31 is fixedly embedded on the auxiliary rotating seat 23, increasing the sealing between the auxiliary rotating seat 23 and the dust filter plate 32 and the rotating cylinder 31.

[0048] A connecting pipe 24 is fixedly connected to one side of the outer wall of the pretreatment tank 2, and the closed end of the connecting pipe 24 extends through into the interior of the storage tank 4 and is located below the barrier fixing frame 51. Several air outlets are opened on the connecting pipe 24 and inside the storage tank 4. The part of the connecting pipe 24 inside the storage tank 4 is horizontally set and fits the bottom of the storage tank 4 to prolong the residence time of the exhaust gas in the cooling water. A fan 25 is fixedly installed on the connecting pipe 24.

[0049] The exhaust fan 25 is started and connected to the connecting pipe 24 to extract the gas in the pretreatment tank 2, creating a negative pressure environment inside the pretreatment tank 2. Then, the exhaust gas generated during the injection molding process of the injection molding equipment body 1 is extracted through the dust suction pipe 22, and the large particulate impurities contained in the gas are filtered through the dust removal filter plate 32 on the rotating cylinder 31. Then, the gas is discharged into the cooling water in the liquid storage tank 4 through the connecting pipe 24 and several air outlets on the connecting pipe 24, so that the small particulate impurities in the exhaust gas are adsorbed and dissolved in the cooling water, thus achieving the purpose of two-stage cooling adsorption filtration treatment of the exhaust gas.

[0050] A vent pipe 26 is provided on the side of the pretreatment tank 2 away from the connecting pipe 24. The air inlet end of the vent pipe 26 extends through the interior of the liquid storage tank 4 and is located above the barrier fixing frame 51. The air inlet end of the vent pipe 26 is located above the cooling water liquid level. At the same time, the air inlet end of the vent pipe 26 is tilted downward to avoid drawing cooling water. It can also assist the exhaust fan 25 to improve the extraction effect of exhaust gas.

[0051] Multiple diversion pipes 27 are fixedly connected between the exhaust pipe 26 and the pretreatment tank 2 to increase the blowing area of ​​the exhaust gas entering the pretreatment tank 2 and improve the dust removal effect on the dust removal filter plate 32. The exhaust pipe 26 is fixedly equipped with a second exhaust fan 28. The surfaces of the housings, fan blades and other parts that come into direct contact with the exhaust gas of the first exhaust fan 25 and the second exhaust fan 28 are coated with anti-corrosion and waterproof coatings to extend the service life of the first exhaust fan 25 and the second exhaust fan 28.

[0052] After the two-stage cooling adsorption filtration process is completed, the exhaust fan 28 is started in conjunction with the exhaust pipe 26 to extract the dust-removed exhaust gas from the storage tank 4. The exhaust gas is then injected into the pretreatment tank 2 through multiple diversion pipes 27. In conjunction with the rotating cylinder 31, the exhaust gas extraction effect is increased, and the dust removal filter plate 32 that has rotated to this position is blown in reverse to achieve automatic cleaning of large particles of impurities on the dust removal filter plate 32.

[0053] The purification chamber 33 has a collection chamber 36 inside, and a barrier filter plate 37 is fixedly connected inside the collection chamber 36. A vibrator 38 is fixedly installed at the bottom of the barrier filter plate 37. An air inlet is opened at the bottom of the collection chamber 36 near the exhaust pipe 26. The upper side of the collection chamber 36 above the air inlet is inclined to guide the exhaust gas into the collection chamber 36 better. Large particles of impurities on the dust removal filter plate 32 of the exhaust fan 28 are blown into the collection chamber 36 through the air inlet and are trapped and collected in the collection chamber 36 by the barrier filter plate 37.

[0054] The vibrator 38 drives the filter plate 37 to vibrate, preventing the filter holes of the filter plate 37 from becoming clogged. A dust-blocking curtain 39 is fixedly connected to the top of the air inlet. The dust-blocking curtain 39 can block the air inlet when the exhaust gas treatment is stopped, which makes it easier to remove the can cover 21 and clean the dust and impurities in the collection chamber 36.

[0055] The top of the purification chamber 33 is threadedly connected to an exhaust pipe 310 that communicates with the collection chamber 36. A barrier screen is fixedly connected to the bottom of the exhaust pipe 310. Activated carbon is filled at the top of the barrier filter plate 37 in the collection chamber 36. After the waste gas enters the collection chamber 36, it undergoes three-stage adsorption purification treatment in conjunction with the activated carbon filled in the purification chamber 33. The waste gas is then discharged through the exhaust pipe 310, which greatly reduces the pollutant content in the exhaust gas. The barrier screen set in the exhaust pipe 310 ensures that the activated carbon particles adhere tightly to each other during the waste gas filtration process, effectively ensuring the adsorption and purification treatment of the waste gas.

[0056] Arc-shaped baffles 311 are symmetrically fixedly connected to both sides of the purification chamber 33. The arc-shaped baffles 311 can prevent a certain flow groove 35 on the rotating cylinder 31 from communicating with the inside of the rotating cylinder 31 and the purification chamber 33 at the same time, which would cause the exhaust gas after cooling water treatment to enter the rotating cylinder 31 and make it impossible to maintain the original negative pressure environment in the pretreatment tank 2. Sealing gaskets are fixedly embedded on the inner wall of the rotating cylinder 31 and around each flow groove 35. The sealing gaskets are slidably connected to the purification chamber 33 and the arc-shaped baffles 311. Through the slidable connection between the sealing gaskets on the inner wall of the rotating cylinder 31 and the purification chamber 33 and the arc-shaped baffles 311, the effect of preventing communication between the inside of the rotating cylinder 31 and the inside of the purification chamber 33 can be ensured.

[0057] Multiple rotating rods 41 are rotatably connected to the bottom of the storage tank 4, and the top of the rotating rods 41 extends into the pretreatment tank 2 and is fixedly connected to a gear 42. An external gear ring 312 that meshes with multiple gears 42 is fixedly connected to the rotating cylinder 31. A stirring blade 43 is fixedly connected to the rotating rod 41 and located below the barrier fixing frame 51. A motor 44 for driving the corresponding rotating rod 41 to rotate is bolted to the bottom of the storage tank 4.

[0058] While the exhaust gas is filtered twice by cooling water, the motor 44 is started to drive the corresponding rotating rod 41 to rotate rapidly. With the help of the gear 42 on the rotating rod 41 meshing with the external gear ring 312, the rotating cylinder 31 rotates at a reduced speed, so that multiple dust removal filter plates 32 can be used alternately and cyclically to block large particles of impurities one by one, ensuring high efficiency in the filtration and dust removal process.

[0059] Example 2: Please refer to Figure 3 , Figure 4 , Figure 8and Figure 9 As shown, the problem of insufficient contact between the exhaust gas and cooling water within the small bubbles, which limits the effective dissolution and removal of some small particulate impurities, can be solved by the following solution:

[0060] In this embodiment, a storage tank 4 is fixedly connected to the bottom of the pretreatment tank 2, and an agitation component 5 is provided inside the storage tank 4. The agitation component 5 includes a barrier fixing frame 51 fixedly connected inside the storage tank 4. A connecting frame 52 is provided above the barrier fixing frame 51, and a barrier block 53 is fixedly connected to the bottom of the connecting frame 52 corresponding to the gap of the barrier fixing frame 51. The liquid level of the cooling water is higher than the highest point of the connecting frame 52. The connecting frame 52 carries multiple barrier blocks 53 to be intermittently inserted into the gap on the barrier fixing frame 51, which further prolongs the residence time of the exhaust gas in the cooling water, further reduces the bubble volume, and significantly improves the removal effect of small particulate impurities in the exhaust gas.

[0061] Multiple rotating rods 41 are rotatably connected to the bottom of the storage tank 4, and the top of the rotating rods 41 extends into the pretreatment tank 2 and is fixedly connected to a gear 42. An external gear ring 312 that meshes with the multiple gears 42 is fixedly connected to the rotating cylinder 31. An stirring blade 43 is fixedly connected to the rotating rod 41 and located below the barrier fixing frame 51. A motor 44 for driving the corresponding rotating rod 41 to rotate is bolted to the bottom of the storage tank 4. Through the reduced speed rotation of the rotating cylinder 31 and the meshing of the external gear ring 312 with the other gears 42, the other synchronous rotating rods 41 are driven to rotate rapidly. Combined with the stirring blades 43 on the rotating rods 41, the cooling water is stirred, eliminating the generation of large bubbles and improving the removal effect of small particulate impurities.

[0062] An active groove 45, which is connected to the pretreatment tank 2, is provided on the inner side wall of the liquid storage tank 4 and between two adjacent sets of rotating rods 41. This groove is used for the sliding connection of the L-shaped plate 54. The L-shaped plate 54, which is fixedly connected to the connecting frame 52, is slidably connected in the active groove 45. An annular cam groove 313 is provided on the annular side wall of the rotating cylinder 31. A guide pin 55, which is adapted to the annular cam groove 313, is fixedly connected on the L-shaped plate 54. During the rotation of the rotating cylinder 31, the guide pins 55 on multiple L-shaped plates 54 can simultaneously reach the highest or lowest point in the annular cam groove 313, thereby eliminating the problem of motion interference.

[0063] The rotation of the rotating cylinder 31, combined with the guidance of the annular cam groove 313 on the multiple guide pins 55, causes the L-shaped plate 54 to carry the connecting frame 52 and the blocking block 53 to move back and forth. The multiple blocking blocks 53 are intermittently inserted into the gaps on the blocking fixing frame 51, increasing the residence time of the exhaust gas discharged from the connecting pipe 24 in the cooling water, further reducing the volume of the bubbles, and in conjunction with the stirring of the stirring blade 43, further improving the filtration effect of small particulate impurities.

[0064] Example 3: Please refer to Figures 1-9 As shown, the present invention also proposes a method of using an injection molding equipment with a waste gas pretreatment and purification mechanism, comprising the following steps:

[0065] Step 1: Start the exhaust fan 25 and connect it with the connecting pipe 24 to extract the gas in the pretreatment tank 2, so that the pretreatment tank 2 is in a negative pressure environment. Then, the exhaust gas generated during the injection molding process of the injection molding equipment body 1 is extracted through the dust suction pipe 22, and the large particulate impurities contained in the gas are filtered through the dust removal filter plate 32 on the rotating cylinder 31. Then, the gas is discharged into the cooling water in the liquid storage tank 4 through the connecting pipe 24 and several air outlets on the connecting pipe 24, so that the small particulate impurities are adsorbed and dissolved in the cooling water.

[0066] Step 2: While the exhaust gas is filtered a second time by cooling water, the motor 44 is started to drive the corresponding rotating rod 41 to rotate rapidly. With the meshing of the gear 42 on the rotating rod 41 and the external gear ring 312, the rotating cylinder 31 is driven to rotate, and the other rotating rods 41 are driven to rotate rapidly. The stirring blades 43 on the rotating rod 41 agitate the cooling water to eliminate the generation of large bubbles and improve the removal effect of small particulate impurities. The rotation of the rotating cylinder 31 drives multiple dust removal filter plates 32 to rotate sequentially to the air inlet position of the connecting pipe 24, and they alternately block large particulate impurities to ensure high efficiency in the filtration and dust removal process.

[0067] Step 3: By rotating the rotating cylinder 31, combined with the guiding action of the annular cam groove 313 on the multiple guide pins 55, the L-shaped plate 54 carries the connecting frame 52 and the blocking block 53 in a reciprocating up and down motion. The multiple blocking blocks 53 are intermittently inserted into the gaps on the blocking fixing frame 51, increasing the residence time of the exhaust gas discharged from the connecting pipe 24 in the cooling water, further reducing the volume of the bubbles, and in conjunction with the stirring of the stirring blade 43, further improving the filtration effect of small particulate impurities.

[0068] Step 4: Start the exhaust fan 28 and exhaust pipe 26 to draw the dust-removed exhaust gas from the storage tank 4. Inject the exhaust gas into the pretreatment tank 2 through multiple diversion pipes 27. Blow air in the opposite direction to the dust removal filter plate 32 that has been rotated to this position. With the cooperation of the arc baffle 311 and the sealing gasket, large particles of impurities on the dust removal filter plate 32 are blown into the collection chamber 36 through the air inlet. They are blocked and collected in the collection chamber 36 by the barrier filter plate 37. Then, the exhaust gas is adsorbed and purified by the activated carbon filled in the collection chamber 36 and discharged. The barrier filter plate 37 is vibrated by the vibrator 38 to prevent the filter holes of the barrier filter plate 37 from becoming blocked.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An injection molding apparatus with exhaust gas pretreatment purification means, comprising an injection molding apparatus body (1), characterized in that, A pretreatment tank (2) is provided on one side of the injection molding equipment body (1), and a tank cover (21) is bolted to the top of the pretreatment tank (2). A dust suction pipe (22) is fixedly connected between the tank cover (21) and the injection molding equipment body (1). The pretreatment tank (2) is equipped with a dust removal and purification component (3). The dust removal and purification component (3) includes a rotating cylinder (31) rotatably installed at the bottom of the pretreatment tank (2). Multiple dust removal filter plates (32) are equidistantly installed on the annular side wall of the rotating cylinder (31). The rotating cylinder (31) is equipped with a purification chamber (33) fixedly connected to the tank cover (21). The bottom of the pretreatment tank (2) is fixedly connected to the storage tank (4), and the storage tank (4) is provided with an agitation component (5). The agitation component (5) includes a barrier fixing frame (51) fixedly connected inside the storage tank (4). A connecting frame (52) is provided above the barrier fixing frame (51), and a barrier block (53) is fixedly connected to the bottom of the connecting frame (52) at the gap of the barrier fixing frame (51). The purification chamber (33) has a collection chamber (36) inside, and a barrier filter plate (37) is fixedly connected inside the collection chamber (36). A vibrator (38) is fixedly installed at the bottom of the barrier filter plate (37). An air inlet is opened at the bottom of the collection chamber (36) on the side near the exhaust pipe (26), and a dust-proof cloth curtain (39) is fixedly connected to the top of the air inlet. The top of the purification chamber (33) is threadedly connected to an exhaust pipe (310) that communicates with the collection chamber (36), and a barrier net is fixedly connected to the bottom of the exhaust pipe (310). Activated carbon is filled in the top of the barrier filter plate (37) in the collection chamber (36). The top of the rotating cylinder (31) is provided with an installation groove (34) that is compatible with the corresponding dust removal filter plate (32). The annular outer wall of the rotating cylinder (31) is provided with a flow groove (35) that is connected to the corresponding installation groove (34). The bottom of the can cover (21) is rotatably connected to an auxiliary rotating seat (23) that abuts against the dust removal filter plate (32) and the rotating cylinder (31). The purification chamber (33) is symmetrically and fixedly connected with arc-shaped baffles (311) on both sides. Sealing gaskets are fixedly embedded on the inner side wall of the rotating cylinder (31) and around each flow groove (35), and the sealing gaskets are slidably connected to the purification chamber (33) and the arc-shaped baffles (311).

2. The injection molding apparatus with exhaust gas pretreatment purification mechanism according to claim 1, characterized by, A connecting pipe (24) is fixedly connected to one side of the outer wall of the pretreatment tank (2), and the closed end of the connecting pipe (24) extends through to the inside of the storage tank (4) and is located below the barrier fixing frame (51). Several air outlets are opened on the connecting pipe (24) and inside the storage tank 4. A blower (25) is fixedly installed on the connecting pipe (24).

3. The injection molding apparatus with exhaust gas pretreatment purifying mechanism according to claim 2, characterized by, A ventilation pipe (26) is provided on the side of the pretreatment tank (2) away from the connecting pipe (24), and the air inlet end of the ventilation pipe (26) extends through to the interior of the storage tank (4) and is located above the barrier fixing frame (51). Multiple diversion pipes (27) are fixedly connected between the ventilation pipe (26) and the pretreatment tank (2), and a second exhaust fan (28) is fixedly provided on the ventilation pipe (26).

4. The injection molding apparatus with exhaust gas pretreatment purifying mechanism according to claim 1, characterized by, The bottom of the storage tank (4) is rotatably connected to multiple rotating rods (41), and the top of the rotating rods (41) extends into the pretreatment tank (2) and is fixedly connected to a gear (42). An external gear ring (312) that meshes with multiple gears (42) is fixedly connected to the rotating cylinder (31). A stirring blade (43) is fixedly connected to the rotating rod (41) and located below the barrier fixing frame 51. A motor (44) for driving the corresponding rotating rod (41) to rotate is bolted to the bottom of the storage tank (4).

5. The injection molding apparatus with exhaust gas pretreatment purifying mechanism according to claim 4, characterized by An active groove (45) communicating with the pretreatment tank 2 is provided on the inner side wall of the liquid storage tank (4) and located between two adjacent sets of rotating rods (41). An L-shaped plate (54) fixedly connected to the connecting frame (52) is slidably connected in the active groove (45). An annular cam groove (313) is provided on the annular side wall of the rotating cylinder (31). A guide pin (55) adapted to the annular cam groove (313) is fixedly connected on the L-shaped plate (54).

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