Efficient gas-assisted injection molding device

Abstract

The invention discloses an efficient gas-assisted injection molding device, and relates to the technical field of gas-assisted injection molding machines, the efficient gas-assisted injection molding device comprises an injection molding device for carrying out injection molding on parts, gas channels are arranged in a fixing frame and a fixing mold arranged on the injection molding device, the fixing frame is communicated with the gas channel of the fixing mold, and a gas injection device is arranged on the side edge of the injection molding device. Nitrogen is injected into the fixing frame and the fixing mold to achieve gas-assisted injection molding, the gas injection device can achieve quantitative supply when injecting nitrogen into the fixing frame, the stability of the injected gas pressure is guaranteed, the gas injection device recovers and reuses the nitrogen after injection molding is completed, and a treatment device for cleaning the mold is arranged on the injection molding device in a sliding mode. According to the nitrogen injection mold, the injected nitrogen is automatically treated, the nitrogen pressure maintaining effect is improved, the air channel of the fixed mold is regularly cleaned, and the situation that the injection molding effect is affected due to the fact that impurities exist in the air channel is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of gas-assisted injection molding machines, and in particular to a high-efficiency gas-assisted injection molding device. Background Art

[0002] Gas-assisted injection molding machine is a technology that uses gas to assist plastic injection molding. This technology improves the molding quality of plastic parts, reduces material usage, and reduces deformation by introducing gas during the injection molding process. The basic principle of gas-assisted injection molding machine is to add gas inside the injection mold during the injection molding process, and the flow of gas helps the molten plastic to better fill the mold and create a suitable structure for the plastic product during the solidification process.

[0003] The Chinese utility model patent with announcement number CN215703674U discloses a nitrogen-assisted injection molding machine. This device is provided with multiple sets of mold bodies and mold film-forming ends. By replacing the film-forming ends, the molding efficiency of the injection molding machine can be adjusted. However, this device cannot recycle the nitrogen used, which easily causes waste and pollution. Moreover, this device cannot effectively control the pressure of nitrogen during gas injection, and cannot regularly clean the mold and the airway on the mold, which affects the molding efficiency of the injection molding machine. Summary of the invention

[0004] In view of the above technical problems, the present invention discloses a high-efficiency gas-assisted injection molding device.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: an efficient gas-assisted injection molding device, comprising an injection molding device, the injection molding device comprising an injection molding frame, a fixed frame is arranged on the injection molding frame, a fixed mold is arranged on the fixed frame, an air channel 1 and an air channel 2 are arranged on the fixed frame and the fixed mold respectively, the air channel 2 is communicated with the air channel 1, a gas injection device is arranged on the side of the injection molding frame, the gas injection device comprises a nitrogen generator and a storage box, the nitrogen generator and the storage box are connected by a connecting pipe, an air inlet box is also arranged on the injection molding frame, the air inlet box is connected to the fixed frame, the storage box is connected to the air inlet box through an air inlet pipe, a pressure holding mechanism is arranged on the air inlet pipe, the pressure holding mechanism ensures the stability of nitrogen after being injected into the mold to avoid deformation of the mold during cooling, an air outlet pipe is arranged on the air inlet box, the air outlet pipe is connected to the storage box, and the nitrogen is recovered, a sliding frame 1 is slidably arranged on the side of the injection molding frame, and a cleaning mechanism is arranged on the sliding frame 1, and the cleaning mechanism cleans the mold on the injection molding device.

[0006] Furthermore, the injection molding frame is provided with a feed frame, the feed frame is provided with a feeding port and a feed column, a feed screw is rotatably provided inside the feed column, and a heating block is provided on the feed column.

[0007] Furthermore, a sliding plate 1 is slidably arranged on the injection molding frame, a sliding mold is detachably arranged on the sliding plate 1, a blanking plate is slidably arranged on the sliding plate 1, and the blanking plate pushes out the parts in the sliding mold.

[0008] Furthermore, a filter box is provided on the air inlet pipe, and a plurality of adsorption plates are provided in the filter box. A heating unit is also provided on the air inlet pipe, and the heating unit controls the temperature of the nitrogen.

[0009] Furthermore, the pressure maintaining mechanism includes a cache box installed on the air intake pipe, and both ends of the cache box connected to the air intake pipe are rotatably provided with closing plates, a sliding plate 2 is slidably provided inside the cache box, and a spring 2 is provided between the sliding plate 2 and the cache box.

[0010] Furthermore, a pressure relief port is provided on the cache box, a closing plate is rotatably provided in the pressure relief port, and an air pressure sensor is provided in the cache box.

[0011] Furthermore, the cleaning mechanism includes a sliding frame three slidably mounted on a sliding frame one, a cleaning frame is slidably arranged on the sliding frame three, a sliding frame four is slidably arranged on the cleaning frame, an adsorption head and a rotating shaft are rotatably arranged on the sliding frame four, a wiping head two is arranged on the rotating shaft, the wiping head two is inserted into the airway two to clean the airway two, and the adsorption head adsorbs the impurities cleaned out.

[0012] Furthermore, a sliding frame 2 is slidably arranged on the sliding frame 1, a rotating frame is rotatably arranged on the sliding frame 2, a plurality of sliding plates are slidably arranged on the rotating frame, a wiping head 1 is arranged on the sliding plate, drying troughs are arranged on both sides of the rotating frame, a rotating disk is rotatably arranged on the rotating frame, and a spray head and a plurality of blowing heads are arranged on the rotating disk.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the gas injection device provided in the present invention performs drying and heat preservation treatment before nitrogen injection, and recycles the nitrogen after injection molding is completed. The injection of high-quality dry nitrogen can avoid the influence of moisture in the air on the product. At the same time, the control of the nitrogen temperature can avoid uneven plastic filling and mold damage caused by uneven temperature. The gas injection device ensures the stability of the gas pressure after the nitrogen enters the mold, and ensures that it is constant during the part molding process to avoid product defects caused by gas pressure fluctuations. The processing device provided in the present invention automatically cleans the mold and regularly cleans the airway in the mold to avoid the airway being blocked or damaged due to gas pollution, plastic residue, carbon deposition and other problems, thereby extending the service life of the mold and reducing the cost of maintenance and replacement of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the overall structure of the present invention.

[0015] Figure 2 for Figure 1 Structural cross-section view in the AA direction.

[0016] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 4 It is a schematic diagram of the structure of the injection molding device of the present invention.

[0018] Figure 5 It is a cross-sectional view of the structure of the injection molding device of the present invention.

[0019] Figure 6 It is a schematic diagram of the structure of the gas injection device of the present invention.

[0020] Figure 7 It is a cross-sectional view of the local structure of the gas injection device of the present invention.

[0021] Figure 8 This is a cross-sectional view of the gas injection device structure of the present invention.

[0022] Fig. 9 It is a schematic diagram of the structure of the processing device of the present invention.

[0023] Fig.10 The local structure of the processing device of the present invention is shown in FIG. Figure 1 .

[0024] Fig.11 The local structure of the processing device of the present invention is shown in FIG. Figure 2 .

[0025] Figure numerals: 1-injection molding device; 2-gas injection device; 3-treatment device; 101-injection molding frame; 102-feeding frame; 103-feeding port; 104-feeding column; 105-heating block 1; 106-fixed frame; 107-fixed mold; 108-sliding plate 1; 109-sliding mold; 110-unloading plate; 111-spring 1; 112-top plate; 113-feeding screw; 114-airway 1; 115-airway 2; 201-buffer box; 202-pressure relief port; 203-nitrogen generator; 204-storage box; 205-filter box; 206-heating block 2; 207-inlet pipe; 208-inlet box; 209-outlet pipe; 210-connecting pipe; 211-closing plate; 212-adsorption plate; 213-sliding plate 2; 214-spring 2; 301-support seat; 302-sliding frame 1; 303-sliding frame 2; 304-sliding frame 3; 305-cleaning frame; 306-rotating frame; 307-sliding plate; 308-wiping head 1; 309-drying trough; 310-rotating disk; 311-blowing head; 312-spraying head; 313-sliding frame 4; 314-adsorption head; 315-rotating shaft; 316-wiping head 2. DETAILED DESCRIPTION

[0026] refer to Figures 1 to 11 A high-efficiency gas-assisted injection molding device shown includes an injection molding device 1 for gas-assisted injection molding, and a gas injection device 2 for injecting nitrogen is arranged on the side of the injection molding device 1. The gas injection device 2 processes the nitrogen while conveying the nitrogen to ensure the purity and temperature of the nitrogen. At the same time, the gas injection device 2 ensures the pressure of the nitrogen in the mold after completing the gas injection to avoid deformation of the parts during the molding process. A processing device 3 for cleaning the mold and the airway is slidingly arranged inside the injection molding device 1. The processing device 3 automatically positions and cleans the airway on the mold, and is suitable for a variety of different types of molds.

[0027] The injection molding device 1 includes an injection molding frame 101, a feeding frame 102 is arranged on the side of the injection molding frame 101, a feeding port 103 and a feeding column 104 are arranged on the feeding frame 102, a feeding screw 113 is arranged inside the feeding column 104 for rotation, and a heating block 105 is also arranged on the feeding column 104. The raw material is placed in the feeding port 103 and then enters the feeding frame 102, and then the feeding screw 113 and the heating block 105 are driven to work, and the feeding screw 113 drives the material in the feeding port 103. The material column 104 moves, and the heating block 105 heats the raw material. The injection molding frame 101 is provided with a fixed frame 106, and two sets of air channels 1 114 are provided in the fixed frame 106. The fixed frame 106 is detachably provided with a fixed mold 107, and the fixed mold 107 is provided with two sets of air channels 2 115. The two sets of air channels 2 115 are connected to the two sets of air channels 1 114. The end of the feed column 104 away from the feeding port 103 is attached to the fixed frame 106, and the feed screw 1 13 drives the molten raw material to be injected into the fixed frame 106, and enters the fixed mold 107 through the fixed frame 106. A sliding plate 108 is slidably provided on the injection frame 101, and a sliding mold 109 is detachably provided on the sliding plate 108. When the parts are injected, the sliding mold 109 is fitted with the fixed mold 107. A blanking plate 110 is slidably provided on the sliding plate 108, and a spring 111 is provided between the blanking plate 110 and the sliding plate 108. A top plate 112 is provided on 101, and the top plate 112 pushes the unloading plate 110 to move. The unloading plate 110 removes the parts that have been completed by injection molding on the sliding mold 109, and drives the sliding plate 108 to move during injection molding. The sliding plate 108 drives the sliding mold 109 to fit with the fixed mold 107, and drives the feeding screw 113 to inject the raw material into the fixed mold 107 and the sliding mold 109, and then injects nitrogen into the air channel 1 114 and the air channel 2 115 to realize gas-assisted injection molding.

[0028] The gas injection device 2 includes a nitrogen generator 203 and a storage box 204 installed on the side of the injection molding frame 101, the nitrogen generator 203 and the storage box 204 are connected by a connecting pipe 210, and the nitrogen produced by the nitrogen generator 203 is stored in the storage box 204 through the connecting pipe 210. Two groups of air intake boxes 208 are arranged on the injection molding frame 101, one group of air intake boxes 208 is arranged at the lower end of the fixed frame 106 and connected to the airway 114 at the lower end of the fixed frame 106, and the other group of air intake boxes 208 is arranged at the upper end of the fixed frame 106 and connected to the airway 114 at the upper end of the fixed frame 106. The storage box 204 is connected to the two groups of air intake boxes 208 through an air intake pipe 207, and the two groups of air intake boxes 208 are provided with an air outlet pipe 209. The pipe 209 is connected to the storage box 204. After the parts are formed, the nitrogen in the parts is extracted and recovered into the storage box 204 through the outlet pipe 209. The air inlet pipe 207 is provided with a filter box 205. The filter box 205 is provided with a plurality of adsorption plates 212. The adsorption plates 212 dry the nitrogen passing through the air inlet pipe 207. The air inlet pipe 207 is also provided with a heating fast 206. The heating fast 206 adjusts the temperature of the nitrogen in the air inlet pipe 207. The air inlet pipe 207 is provided with a cache box 201. Both sides of the connection between the cache box 201 and the air inlet pipe 207 are rotatably provided with a group of closing plates 211. The cache box 201 is also provided with a pressure relief port 202 and an air pressure sensor. The pressure relief port 202 is provided with a There is an adsorption plate 212, and a sliding plate 213 is slidingly arranged in the cache box 201. A spring 214 is arranged between the sliding plate 213 and the cache box 201. Before injection molding of the parts, nitrogen is injected into the cache box 201, and a group of closing plates 211 on the air inlet pipe 207 close to the filter box 205 are opened, and a group of closing plates 211 close to the heating block 206 are closed. At this time, nitrogen enters the cache box 201. Due to the increase in the air pressure in the cache box 201, the sliding plate 213 slides on the cache box 201, and the sliding plate 213 squeezes the spring 214. When the pressure in the cache box 201 reaches the preset value, a group of closing plates 211 close to the filter box 205 are driven to close, so as to realize the cache box 201. The mold is sealed. When nitrogen needs to be injected into the mold, a group of closing plates 211 close to the heating block 206 is driven to rotate. At this time, the sliding plate 213 is reset by the deformation restoring force of the spring 214. The sliding plate 213 pushes the nitrogen in the buffer box 201 out, and the nitrogen enters the mold through the air inlet pipe 207 and the air inlet box 208. After the sliding plate 213 is reset, it will not move again, ensuring that the pressure in the air inlet pipe 207, the air inlet box 208, the fixed frame 106 and the fixed mold 107 will not change, thereby achieving the pressure maintaining effect of the nitrogen in the mold and avoiding the influence of the change of the nitrogen pressure on the molding of the parts. After the parts are formed, the nitrogen in the mold is recovered to the storage box 204 through the air outlet pipe 209.

[0029] The processing device 3 includes a support seat 301 installed on the side of the injection molding frame 101, a sliding frame 1 302 is slidably arranged on the support seat 301, a sliding frame 304 is slidably arranged on the sliding frame 1 302, a cleaning frame 305 is slidably arranged on the sliding frame 304, a sliding frame 4 313 is slidably arranged on the cleaning frame 305, an adsorption head 314 and a rotating shaft 315 are rotatably arranged on the sliding frame 4 313, a wiping head 2 316 is arranged on the rotating shaft 315, the wiping head 2 316 is inserted into the airway 2 115 to clean the airway 2 115, the adsorption head 314 adsorbs the dust and other debris cleaned out, and the sliding frame 1 302 is slidably arranged on the cleaning frame 305. A sliding frame 303 is movably provided, and a rotating frame 306 is rotatably provided on the sliding frame 303. A plurality of sliding plates 307 are slidably provided on the rotating frame 306. A wiping head 308 is provided at one end of the sliding plate 307 close to the rotating frame 306. The wiping head 308 wipes the fixed mold 107 and the sliding mold 109. A group of drying troughs 309 are provided on both sides of the rotating frame 306. A rotating disk 310 is also rotatably provided on the rotating frame 306. A spray head 312 and a plurality of blowing heads 311 are provided on the rotating disk 310. The spray head 312 sprays cleaning liquid on the mold, and the blowing head 311 blows off dust and other debris on the mold.

[0030] Working principle: When working, the sliding plate 108 is driven to slide on the injection molding frame 101, and the sliding plate 108 drives the sliding mold 109 to fit with the fixed mold 107, and the injection molding raw material is put into the feeding column 104 through the feeding port 103 and the feeding frame 102, and the heating block 105 and the feeding screw 113 are driven to work, and the heating block 105 melts the injection molding raw material, and the feeding screw 113 drives the raw material to move and inject it into the fixed frame 106, and the gas injection device 2 is driven to inject nitrogen into the airway 114 to realize gas-assisted injection molding of parts. After molding, the nitrogen is recovered through the gas injection device 2, and the sliding plate 108 is driven to move, and the sliding plate 108 drives the molded parts to move. The sliding plate 108 drives the unloading plate 110 to fit with the top plate 112 and then continues to move, and the top plate 112 squeezes the unloading plate 110, and the unloading plate 110 pushes out the parts formed on the sliding mold 109.

[0031] When the gas injection device 2 is working, nitrogen is generated by the nitrogen generator 203 and stored in the storage box 204. When nitrogen needs to be injected into the mold, the storage box 204 is driven to work, and the storage box 204 transports nitrogen to the air inlet pipe 207. When the nitrogen passes through the filter box 205, the nitrogen is dried by the adsorption plate 212 to avoid excessive humidity of the nitrogen. At the same time, a group of sealing plates 211 close to the adsorption plate 212 in the air inlet pipe 207 are opened, and the nitrogen enters the cache box 201. Since the cache box 201 is a closed environment, the nitrogen enters the cache box 201 at this time, and the sliding plate 213 is pushed by the air pressure to slide in the cache box 201. The sliding plate 213 compresses the spring 214. When the air pressure sensor in the cache box 201 detects that the pressure in the cache box 201 reaches the preset standard, it is driven close to the filter box. A group of closing plates 211 of 205 is closed. When nitrogen needs to be injected into the mold, a group of closing plates 211 near the second heating unit 206 is driven to open. At this time, the sliding plate 213 is reset by the deformation recovery force of the second spring 214. At this time, the nitrogen in the buffer box 201 enters the injection molding device 1 through the air inlet pipe 207 and the air inlet box 208, and the second heating unit 206 is started at the same time. The second heating unit 206 adjusts the temperature of the nitrogen in the air inlet pipe 207. When the sliding plate 213 is reset, the nitrogen in the buffer box 201 will not be discharged again. At this time, the nitrogen pressure is maintained to ensure that the pressure of the nitrogen in the mold will not change, so as to avoid affecting the molding process of the parts. After the parts are formed, the nitrogen is recovered to the storage box 204 through the air inlet box 208 and the air outlet pipe 209 to avoid nitrogen leakage and waste.

[0032] When it is necessary to clean the fixed mold 107, the sliding mold 109 and the airway 115, the sliding frame 1 302 is driven to slide on the support seat 301, and the buffer box 201 drives the rotating frame 306 and the wiping head 2 316 to move to the inside of the injection molding frame 101. When it is necessary to process the surface of the fixed mold 107 and the sliding mold 109, the sliding frame 2 303 is driven to slide on the sliding frame 1 302, and the position of the sliding frame 2 303 is adjusted. The sliding frame 2 303 drives the rotating frame 306 to move, and the rotating frame 306 is driven to rotate on the sliding frame 2 303. The direction of the rotating frame 306 is changed. When the rotating frame 306 is driven to rotate on the sliding frame 2 303, the sliding frame 304 needs to be driven to reach the sliding frame 306. The movable frame 1 302 is at the lower end to prevent the sliding frame 2 303 and the sliding frame 304 from being too close to each other, which may cause a collision when the rotating frame 306 rotates. The sliding plate 307 is driven to slide on the rotating frame 306. The sliding plate 307 drives the wiping head 1 308 to fit with the fixed mold 107 or the sliding mold 109 to wipe the stains on the surface. The spray head 312 is driven to spray the cleaning liquid on the fixed mold 107 or the sliding mold 109. The drying tank 309 is driven to dry. When the rotating disk 310 is driven to rotate, the rotating disk 310 drives the blowing head 311 to rotate. The blowing head 311 is driven to blow off the dust on the fixed mold 107 and the sliding mold 109 to avoid affecting the injection molded parts.

[0033] When it is necessary to clean the inside of airway two 115, drive sliding frame three 304 to slide on sliding frame one 302, drive sliding frame four 313 to slide on cleaning frame 305, when wiping head two 316 is aligned with airway two 115, drive cleaning frame 305 to slide on sliding frame three 304, cleaning frame 305 drives wiping head two 316 to insert into airway two 115, drive rotating shaft 315 to rotate, rotating shaft 315 drives wiping head two 316 to rotate, wiping head two 316 cleans the inside of airway two 115, and at the same time drive adsorption head 314 to rotate on sliding frame four 313, aligning adsorption head 314 with airway two 115, start adsorption head 314, adsorption head 314 adsorbs the dust cleaned in airway two 115, and completes the cleaning of airway two 115.

Claims

1. A high-efficiency gas-assisted injection molding device, comprising an injection molding device (1), characterized in that: The injection molding device (1) comprises an injection molding frame (101), a fixed frame (106) is arranged on the injection molding frame (101), a fixed mold (107) is arranged on the fixed frame (106), an air channel 1 (114) and an air channel 2 (115) are arranged on the fixed frame (106) and the fixed mold (107), respectively, the air channel 2 (115) is communicated with the air channel 1 (114), a gas injection device (2) is arranged on the side of the injection molding frame (101), the gas injection device (2) comprises a nitrogen generator (203) and a storage box (204), the nitrogen generator (203) and the storage box (204) are connected via a connecting pipe (210), and the injection molding frame (101) An air inlet box (208) is also provided on the mold, and the air inlet box (208) is connected to the fixed frame (106). The storage box (204) is connected to the air inlet box (208) through an air inlet pipe (207). A pressure-maintaining mechanism is provided on the air inlet pipe (207). The pressure-maintaining mechanism ensures the stability of the mold after the nitrogen is injected into the mold to avoid deformation of the mold during cooling. An air outlet pipe (209) is provided on the air inlet box (208). The air outlet pipe (209) is connected to the storage box (204) to recover the nitrogen. A sliding frame (302) is slidably provided on the side of the injection molding frame (101). A cleaning mechanism is provided on the sliding frame (302). The cleaning mechanism cleans the mold on the injection molding device (1).

2. A high-efficiency gas-assisted injection molding device according to claim 1, characterized in that: The injection molding frame (101) is provided with a feeding frame (102), the feeding frame (102) is provided with a feeding port (103) and a feeding column (104), a feeding screw (113) is rotatably provided inside the feeding column (104), and a heating block (105) is provided on the feeding column (104).

3. The high-efficiency gas-assisted injection molding device according to claim 1, characterized in that: A sliding plate (108) is slidably arranged on the injection molding frame (101), a sliding mold (109) is detachably arranged on the sliding plate (108), a blanking plate (110) is slidably arranged on the sliding plate (108), and the blanking plate (110) pushes out the parts in the sliding mold (109).

4. The high-efficiency gas-assisted injection molding device according to claim 1, characterized in that: The air inlet pipe (207) is provided with a filter box (205), and a plurality of adsorption plates (212) are arranged inside the filter box (205). The air inlet pipe (207) is also provided with a heating block (206), and the heating block (206) controls the temperature of the nitrogen.

5. The high-efficiency gas-assisted injection molding device according to claim 2, characterized in that: The pressure maintaining mechanism comprises a cache box (201) installed on the air intake pipe (207), both ends of the cache box (201) connected to the air intake pipe (207) are rotatably provided with closing plates (211), a sliding plate 2 (213) is slidably provided inside the cache box (201), and a spring 2 (214) is provided between the sliding plate 2 (213) and the cache box (201).

6. A high-efficiency gas-assisted injection molding device according to claim 5, characterized in that: The cache box (201) is provided with a pressure relief port (202), a closing plate (211) is rotatably provided inside the pressure relief port (202), and an air pressure sensor is provided inside the cache box (201).

7. The high-efficiency gas-assisted injection molding device according to claim 1, characterized in that: The cleaning mechanism comprises a sliding frame three (304) slidably mounted on a sliding frame one (302); a cleaning frame (305) is slidably arranged on the sliding frame three (304); a sliding frame four (313) is slidably arranged on the cleaning frame (305); an adsorption head (314) and a rotating shaft (315) are rotatably arranged on the sliding frame four (313); a wiping head two (316) is arranged on the rotating shaft (315); the wiping head two (316) is inserted into the airway two (115) to clean the airway two (115); and the adsorption head (314) adsorbs the impurities cleaned out.

8. The high-efficiency gas-assisted injection molding device according to claim 7, characterized in that: A sliding frame (303) is slidably arranged on the sliding frame (302), a rotating frame (306) is rotatably arranged on the sliding frame (303), a plurality of sliding plates (307) are slidably arranged on the rotating frame (306), a wiping head (308) is arranged on the sliding plate (307), drying troughs (309) are arranged on both sides of the rotating frame (306), a rotating disk (310) is rotatably arranged on the rotating frame (306), and a spray head (312) and a plurality of blowing heads (311) are arranged on the rotating disk (310).

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