Blow molding electric mold closing frame and blow molding equipment

Abstract

The invention relates to the field of blow molding mechanisms, and discloses a blow molding electric mold closing frame which comprises a mold closing frame body, and the mold closing frame body comprises a rear mold plate, a middle mold plate and a front mold plate; the mold is installed between the middle mold plate and the front mold plate, and the shape of an inner cavity of the mold is matched with the shape of a blow molding product; a template shaft is connected between the rear template and the front template; four corners of the middle template are in sliding connection with the outer wall of the template shaft; a driving device is connected between the rear mold plate and the middle mold plate and drives the middle mold plate to slide in a reciprocating mode in the direction of the mold plate shaft. The front mold plate and the rear mold plate are fixed together under the action of the mold plate shaft, the middle mold plate slides on the mold plate shaft, the lead screw is driven to rotate through the transformation ratio of the synchronous belt and the synchronous wheel under the rotation of the servo motor, and the lead screw sleeve is fixed to the middle mold plate and moves forwards under the action of the lead screw to achieve the mold closing action. A mold closing spring is installed between the lead screw sleeve and the middle mold plate, and mold clamping force is continuously generated through the mold closing spring in the actual production process.

Description

Technical Field

[0001] The invention relates to the technical field of blow molding mechanisms, in particular to a blow molding electric mold clamping frame and blow molding equipment. Background Art

[0002] The blow molding mechanism is a plastic processing machine that uses air pressure to blow up the plastic parison and make it close to the inner wall of the mold. After cooling and demoulding, various hollow products are obtained. The plastic is melted and quantitatively extruded in the screw extruder, then formed through the die, and then cooled by air ring blowing; The existing clamping frame adopts a single clamping mechanism, and can only perform a set of separate blowing operations during blow molding, resulting in low processing efficiency of the blow-molded finished product. Summary of the invention

[0003] The present invention provides the following technical solutions: In one aspect, the present invention provides a blow molding electric mold clamping frame, comprising a mold clamping frame body, wherein the mold clamping frame body comprises: rear template, middle template and front template; A mold, the mold is installed between the middle mold plate and the front mold plate, and the inner cavity shape of the mold matches the shape of the blow molded product; A template shaft is connected between the rear template and the front template, and the four corners of the middle template are slidably connected to the outer wall of the template shaft; A driving device is connected between the rear template and the middle template, and the driving device drives the middle template to slide back and forth along the direction of the template axis; When the middle template slides back and forth on the template shaft, the middle template and the front template move closer to or farther away from each other.

[0004] Preferably, a servo motor is fixedly installed above the rear template, a lead screw is installed in the middle of the rear template, one end of the lead screw is rotatably connected to the middle of the rear template, one end of the lead screw is connected to a first transmission wheel, the output end of the servo motor is connected to a second transmission wheel, and the first transmission wheel and the second transmission wheel are connected via a transmission belt.

[0005] Preferably, one end of the middle template is connected to a screw sleeve, the screw sleeve and the middle template are connected by bolts, and a mold closing spring is also connected between the screw sleeve and the middle template. The screw is threadedly connected to the screw sleeve, and when the servo motor drives the screw to rotate, the middle template can slide back and forth on the template shaft with the cooperation of the screw sleeve.

[0006] On the other hand, the present invention also provides a blow molding device, including an extruder and a blow molding mechanism, wherein the blow molding mechanism is installed at one end of the extruder, the extruder includes a barrel and a base, a screw is installed inside the barrel, the screw is rotatably connected to the inside of the barrel, a drive motor is installed at one end of the screw, an extruder frame is installed on the top of the base, the bottom of the extruder frame and the top of the base are slidably installed through an electric slide rail, the barrel is fixedly installed on the top of the extruder frame, and a guardrail is also connected around the top of the extruder frame; The blow molding mechanism includes a box body, which is provided with box doors around it, a turntable is installed inside the box body, the turntable is rotatably connected to the middle part of the box body, a turntable motor is installed at the bottom of the turntable, the output end of the turntable motor is connected to the bottom of the turntable, and the mold clamping frame body rotates synchronously with the turntable.

[0007] Preferably, three screw barrels are provided, and a cast aluminum heating ring is installed on the outside of the screw barrel, and the cast aluminum heating ring is used to heat the plastic raw material inside the screw barrel. A feed hopper is installed on the top of the screw barrel, and the interior of the feed hopper is connected to the interior of the screw barrel.

[0008] Preferably, a water jacket is also installed on the top of the turntable, and a water pipe is connected around the water jacket. The water pipe is connected to the water jacket, and the water jacket is connected to an external water source. The other end of the water pipe is connected to one end of the mold. The mold has a cooling cavity inside, and the water pipe is connected to the inside of the cooling cavity.

[0009] Preferably, the bottoms of the rear template and the front template are fixedly mounted on the bottom of the inner wall of the turntable, the turntable is provided with six combined mold frame bodies, the end of the screw barrel close to the blow molding mechanism is connected to a die head, the discharge port of the die head is downward and aligned with the clamping frame body, the clamping frame body located below the die head is defined as the first station, the clamping frame bodies distributed in the clockwise direction of the turntable are the second station, the third station, the fourth station, the fifth station and the sixth station respectively, and a blowing assembly is installed above each of the six clamping frame bodies, the blowing assembly comprises a fixed block, a blowing rod and a telescopic cylinder, the telescopic cylinder, the fixed block and the blowing rod are connected in sequence from top to bottom, the top of the telescopic cylinder is fixed on the turntable, and the telescopic cylinder can drive the fixed block and the blowing rod to move up and down.

[0010] Preferably, a conveyor belt and a processing room are provided on one side of the blow molding mechanism, and a robot is provided on one side of the sixth station, and the robot can clamp the blow-molded product on the sixth station onto the conveyor belt.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention fixes the front template and the rear template together under the action of the template shaft, and the middle template slides on the template shaft. The lead screw is driven to rotate through the transformation ratio of the synchronous belt and the synchronous wheel under the rotation of the servo motor. The lead screw sleeve is fixed on the middle template and moves forward under the action of the lead screw to realize the mold closing action. A mold closing spring is installed between the lead screw sleeve and the middle template. In actual production, the mold locking force is continuously generated by the mold closing spring. It is driven by a servo motor and has the effects of green environmental protection, high speed and energy saving compared with the oil cylinder drive in the prior art.

[0012] 2. The clamping spring of the servo motor of the present invention provides the clamping force after the servo motor moves into position. The elastic deformation soft connection is used to better protect the servo motor from overloading, and the mold is squeezed by the clamping spring.

[0013] 3. The present invention is provided with a plurality of clamping frame bodies and a turntable, so that when the extruder heats the plastic raw material and extrude it into a paste-like material, the turntable is rotated to make one of the clamping frame bodies correspond to the die head of the extruder, and the plastic material is extruded into a hollow cylindrical material through the die head and injected into the mold between the middle template and the front template, and then the plastic material is blown into a finished product through the blowing component. The turntable allows the clamping frame body to work uninterruptedly, thereby improving the work efficiency of blow molding.

[0014] 4. The present invention provides a plurality of clamping frame bodies, which are evenly arranged in a full circle around the turntable, thereby greatly improving the efficiency of blow molding compared with the parallel double-station or single-station in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of the blow molding mechanism and the clamping frame body of the present invention; Figure 2 It is a partial structural schematic diagram of the blow molding mechanism and the clamping frame body of the present invention; Figure 3 A three-dimensional diagram of the mold clamping frame body of the present invention; Figure 4 It is a cross-sectional view of the mold clamping frame body of the present invention; Figure 5 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 6 It is a three-dimensional diagram of the blowing assembly of the present invention.

[0016] In the figure: 1. extruder; 101. base; 102. extruder frame; 103. guardrail; 104. drive motor; 105. screw barrel; 106. feed hopper; 2. blow molding mechanism; 201. box; 202. turntable; 203. water pipe; 204. water jacket; 3. mold clamping frame body; 301. rear template; 302. middle template; 303. front template; 304. template shaft; 305. servo motor; 306. lead screw; 307. first transmission wheel; 308. second transmission wheel; 309. transmission belt; 310. lead screw sleeve; 311. mold clamping spring; 401. processing room; 402. conveyor belt; 5. blowing assembly; 501. fixing block; 502. blowing rod; 503. telescopic cylinder. DETAILED DESCRIPTION

[0017] See also Figure 1-6 : Embodiment 1: This embodiment provides a blow molding electric clamping frame, including a clamping frame body 3, wherein the clamping frame body 3 includes: A rear template 301, a middle template 302 and a front template 303; A mold 312, wherein the mold 312 is installed between the middle mold plate 302 and the front mold plate 303, and the inner cavity shape of the mold 312 matches the shape of the blow-molded product; A template shaft 304 is connected between the rear template 301 and the front template 303, and the four corners of the middle template 302 are slidably connected to the outer wall of the template shaft 304; A driving device is connected between the rear template 301 and the middle template 302, and the driving device drives the middle template 302 to slide back and forth along the direction of the template axis 304; When the middle template 302 slides back and forth on the template shaft 304 , the middle template 302 and the front template 303 move closer to or farther from each other.

[0018] As a further improvement, a servo motor 305 is fixedly installed above the rear template 301, a lead screw 306 is installed in the middle of the rear template 301, one end of the lead screw 306 is rotatably connected to the middle of the rear template 301, one end of the lead screw 306 is connected to a first transmission wheel 307, the output end of the servo motor 305 is connected to a second transmission wheel 308, and the first transmission wheel 307 and the second transmission wheel 308 are connected via a transmission belt 309.

[0019] As a further improvement, one end of the middle template 302 is connected to a screw sleeve 310, and the screw sleeve 310 and the middle template 302 are connected by bolts. A mold closing spring 311 is also connected between the screw sleeve 310 and the middle template 302. The screw 306 is threadedly connected to the screw sleeve 310. When the servo motor 305 drives the screw 306 to rotate, the middle template 302 can slide back and forth on the template shaft 304 with the cooperation of the screw sleeve 310.

[0020] Working principle: The servo motor 305 drives the second transmission wheel 308 to rotate, and the second transmission wheel 308 rotates synchronously with the first transmission wheel 307 through the transmission belt 309, and the first transmission wheel 307 drives the lead screw 306 to rotate. Since the lead screw sleeve 310 fixed on the middle template 302 is connected with the lead screw 306, when the lead screw 306 rotates, the lead screw sleeve 310 and the middle template 302 can be driven to slide on the template shaft 304, so that the mold 312 between the middle template 302 and the front template 303 is close to each other, so that the plastic raw material can be accommodated in the mold cavity of the mold 312, and there is a mold closing spring 311 between the lead screw sleeve 310 and the middle template 302, so that the mold closing spring 311 provides a clamping force after the servo motor 305 moves into place. The elastic deformation soft connection can better protect the servo motor 305 from being overloaded, and the mold 312 is squeezed by the squeezed mold closing spring 311.

[0021] Embodiment 2: This embodiment provides a blow molding device, which includes an extruder 1 and a blow molding mechanism 2 on the basis of embodiment 1, wherein the blow molding mechanism 2 is installed at one end of the extruder 1, and the extruder 1 includes a screw barrel 105 and a base 101, wherein a screw is installed inside the screw barrel 105, wherein the screw is rotatably connected to the inside of the screw barrel 105, wherein a drive motor 104 is installed at one end of the screw, and an extruder frame 102 is installed on the top of the base 101, wherein the bottom of the extruder frame 102 and the top of the base 101 are slidably installed via an electric slide rail, wherein the screw barrel 105 is fixedly installed on the top of the extruder frame 102, and a guardrail 103 is also connected around the top of the extruder frame 102; The blow molding mechanism 2 includes a box body 201, and the box body 201 is provided with box doors around it. A turntable 202 is installed inside the box body 201, and the turntable 202 is rotatably connected to the middle part of the box body 201. A turntable motor is installed at the bottom of the turntable 202, and the output end of the turntable motor is connected to the bottom of the turntable 202. The mold clamping frame body 3 rotates synchronously with the turntable 202.

[0022] As a further improvement, the screw barrel 105 is provided with three, and a cast aluminum heating ring is also installed on the outside of the screw barrel 105, and the cast aluminum heating ring is used to heat the plastic raw material inside the screw barrel 105. A feed hopper 106 is installed on the top of the screw barrel 105, and the interior of the feed hopper 106 is connected to the interior of the screw barrel 105.

[0023] As a further improvement, a water jacket 204 is also installed on the top of the turntable 202, and a water pipe 203 is connected around the water jacket 204. The water pipe 203 is connected to the water jacket 204, and the water jacket 204 is connected to an external water source. The other end of the water pipe 203 is connected to one end of the mold 312. The mold 312 has a cooling cavity inside, and the water pipe 203 is connected to the inside of the cooling cavity.

[0024] As a further improvement, the bottoms of the rear template 301 and the front template 303 are fixedly mounted on the bottom of the inner wall of the turntable 202, and the turntable 202 has six combined mold frame bodies 3. The end of the screw barrel 105 close to the blow molding mechanism 2 is connected to a die head, and the discharge port of the die head is downward and aligned with the clamping frame body 3. The clamping frame body 3 located below the die head is defined as the first station, and the clamping frame bodies 3 distributed in the clockwise direction of the turntable 202 are the second station, the third station, the fourth station, the fifth station and the sixth station respectively. A blowing assembly 5 is installed above the six clamping frame bodies 3, and the blowing assembly 5 includes a fixed block 501, a blowing rod 502 and a telescopic cylinder 503. The telescopic cylinder 503, the fixed block 501 and the blowing rod 502 are connected in sequence from top to bottom, and the top of the telescopic cylinder 503 is fixed on the turntable 202, and the telescopic cylinder 503 can drive the fixed block 501 and the blowing rod 502 to move up and down.

[0025] As a further improvement, a conveyor belt 402 and a processing room 401 are provided on one side of the blow molding mechanism 2, and a manipulator is provided on one side of the sixth station, and the manipulator can clamp the blow-molded product on the sixth station to the conveyor belt 402, and the processing room is a subsequent processing step of the blow-molded product; Working principle: the material in the screw barrel 105 in the extruder 1 is extruded from the die head under the rotation of the screw, and the extruded shape is a hollow cylinder; then the turntable motor drives the turntable to rotate, thereby driving the clamping frame body 3 of one of the stations to rotate to the bottom of the die head, and the hollow cylindrical material is located in the mold 312 of the clamping frame body 3, and then the servo motor 305 of the clamping frame body 3 drives the middle template 302 to approach the front template 303, and then the blowing rod 502 in the blowing assembly 5 blows gas into the hollow cylindrical material, and expands it into the final product. Finally, when the clamping frame body 3 of this station is driven by the turntable 202 to rotate to the sixth station, the finished product is clamped to the conveyor belt 402 by the robot, and the entire blow molding work is completed.

Claims

1. A blow molding electric clamping frame, characterized in that: The mold clamping frame body (3) comprises: A rear template (301), a middle template (302) and a front template (303); A mold (312), wherein the mold (312) is installed between the middle mold plate (302) and the front mold plate (303), and the inner cavity shape of the mold (312) matches the shape of the blow-molded product; A template shaft (304) is connected between the rear template (301) and the front template (303), and the four corners of the middle template (302) are slidably connected to the outer wall of the template shaft (304); A driving device is connected between the rear template (301) and the middle template (302), and the driving device drives the middle template (302) to slide back and forth along the direction of the template axis (304); When the middle template (302) slides back and forth on the template shaft (304), the middle template (302) and the front template (303) move closer to or farther away from each other.

2. The electric mold clamping frame for blow molding according to claim 1, characterized in that: A servo motor (305) is fixedly mounted above the rear template (301), a lead screw (306) is mounted in the middle of the rear template (301), one end of the lead screw (306) is rotatably connected to the middle of the rear template (301), one end of the lead screw (306) is connected to a first transmission wheel (307), an output end of the servo motor (305) is connected to a second transmission wheel (308), and the first transmission wheel (307) and the second transmission wheel (308) are connected in transmission via a transmission belt (309).

3. The electric mold clamping frame for blow molding according to claim 2, characterized in that: One end of the middle template (302) is connected to a lead screw sleeve (310), the lead screw sleeve (310) and the middle template (302) are connected via bolts, a mold clamping spring (311) is also connected between the lead screw sleeve (310) and the middle template (302), the lead screw (306) is threadedly connected to the lead screw sleeve (310), and when the servo motor (305) drives the lead screw (306) to rotate, the middle template (302) can slide back and forth on the template shaft (304) under the cooperation of the lead screw sleeve (310).

4. A blow molding equipment, comprising the blow molding electric clamping frame according to claim 3, characterized in that: The extruder (1) comprises an extruder (1) and a blow molding mechanism (2), wherein the blow molding mechanism (2) is mounted at one end of the extruder (1), and the extruder (1) comprises a screw barrel (105) and a base (101), wherein a screw is mounted inside the screw barrel (105), wherein the screw is rotatably connected to the inside of the screw barrel (105), wherein a drive motor (104) is mounted at one end of the screw, and an extruder frame (102) is mounted on the top of the base (101), wherein the bottom of the extruder frame (102) and the top of the base (101) are slidably mounted via an electric slide rail, wherein the screw barrel (105) is fixedly mounted on the top of the extruder frame (102), and a guardrail (103) is also connected around the top of the extruder frame (102); The blow molding mechanism (2) comprises a box body (201), the box body (201) is provided with box doors on all sides, a turntable (202) is installed inside the box body (201), the turntable (202) is rotatably connected to the middle part of the box body (201), a turntable motor is installed at the bottom of the turntable (202), the output end of the turntable motor is connected to the bottom of the turntable (202), and the clamping frame body (3) rotates synchronously with the turntable (202).

5. A blow molding device according to claim 4, characterized in that: The screw barrels (105) are provided with three screw barrels (105). A cast aluminum heating ring is installed outside the screw barrel (105). The cast aluminum heating ring is used to heat the plastic raw material inside the screw barrel (105). A feed hopper (106) is installed on the top of the screw barrel (105). The inside of the feed hopper (106) is connected to the inside of the screw barrel (105).

6. A blow molding device according to claim 5, characterized in that: A water jacket (204) is also installed on the top of the turntable (202); a water pipe (203) is connected around the water jacket (204); the water pipe (203) is in communication with the water jacket (204); the water jacket (204) is connected to an external water source; the other end of the water pipe (203) is connected to one end of the mold (312); a cooling cavity is provided inside the mold (312); the water pipe (203) is in communication with the inside of the cooling cavity.

7. A blow molding device according to claim 6, characterized in that: The bottoms of the rear template (301) and the front template (303) are fixedly mounted on the bottom of the inner wall of the turntable (202); the turntable (202) has six combined mold frame bodies (3); one end of the screw barrel (105) close to the blow molding mechanism (2) is connected to a die head; the discharge port of the die head faces downward and is aligned with the mold clamping frame body (3); the mold clamping frame body (3) located below the die head is defined as the first workstation; the mold clamping frame bodies (3) distributed in the clockwise direction of the turntable (202) are the second workstation, the third workstation, the fourth workstation, the fifth workstation, the sixth workstation, the eighth workstation, the ninth workstation, the ninth workstation, the ninth workstation, the ninth workstation, the ninth workstation, the ninth workstation, the ninth workstation, the ninth workstation, the ninth workstation, the ninth workstation, At the fourth station, the fifth station and the sixth station, a blowing assembly (5) is installed above each of the six clamping frame bodies (3), the blowing assembly (5) comprising a fixed block (501), a blowing rod (502) and a telescopic cylinder (503), the telescopic cylinder (503), the fixed block (501) and the blowing rod (502) being connected in sequence from top to bottom, the top of the telescopic cylinder (503) being fixed on a rotating disk (202), and the telescopic cylinder (503) being capable of driving the fixed block (501) and the blowing rod (502) to move up and down.

8. The blow molding electric clamping frame and blow molding equipment according to claim 7, characterized in that: A conveyor belt (402) and a processing room (401) are provided on one side of the blow molding mechanism (2), and a robot is provided on one side of the sixth station, wherein the robot can clamp the blow-molded product on the sixth station onto the conveyor belt (402).

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