A die for a blow molding machine

Abstract

The present application relates to the field of blow molding machine, disclose a kind of die head for blow molding machine, comprising: die head body;Flow space adjusting structure is arranged in the die head body, adjusting liquid plastic flow capacity;Push-pull structure is arranged in the die head body, control the flow space adjusting structure, to adjust the size of liquid plastic flow space in the die head body;By setting flow space adjusting structure, push-pull structure and rotary extrusion structure, by rotary extrusion structure can directly be adjusted flow space adjusting structure in the die head body outside, cooperate push-pull structure, by adjusting the opening size of flow channel, to realize liquid plastic flow capacity, not only simple, convenient, and also ensure that die head body stable discharge, also reduce the working cost.

Description

Technical Field

[0001] This invention relates to the technical field of blow molding machines, and in particular to a die head for blow molding machines. Background Technology

[0002] A blow molding machine is a plastic processing equipment used to produce hollow plastic products. Its core principle is to blow molten plastic into a mold cavity using air power to form the product. When the blow molding machine is working, it uses a blow molding die head, which is an auxiliary device used to spray the liquid plastic out of the blow molding machine. The existing technology patent number CN216968635U discloses a blow molding die head of a blow molding machine. The motor drives the lead screw to rotate, and the lead screw drives two sets of moving nuts to move inward or outward through the threaded holes on two sets of moving nuts. The two sets of moving nuts drive two sets of adjusting plates to move inward or outward through two sets of tie rods, thereby adjusting the distance between the inner ends of the two sets of adjusting plates and the flow rate of liquid plastic between the two sets of adjusting plates. However, in actual operation, the vibration generated by the motor during operation can easily cause unstable material output from the die head, reducing the quality of blow molding and increasing operating costs. Therefore, there are areas for improvement. Summary of the Invention

[0003] In order to solve the problems mentioned in the background art, the present invention provides a die head for a blow molding machine.

[0004] The present invention provides a die head for a blow molding machine, which adopts the following technical solution: A die head for a blow molding machine, comprising: Mold head body; A flow space adjustment structure is provided inside the die head body to adjust the flow rate of liquid plastic; A push-pull structure is provided inside the die head body to control the flow space adjustment structure, thereby adjusting the size of the liquid plastic flow space inside the die head body; A rotary extrusion structure is provided on the outer side of the die head body, and a flow space adjustment structure is controlled on the outer side of the die head body; A sealing structure is provided in the die head body for sealing operations; A positioning structure is provided between the rotary extrusion structure and the die head body to position the rotary extrusion structure. A pressing structure is provided on the rotary extrusion structure, and pressing releases the positioning structure from its positioning position. A dust-proof sealing structure is installed near the discharge end of the die head body to block the discharge end of the die head body; The drive structure is located on the outer side of the mold head body near the bottom, controlling the sealing and dustproof structure to seal or open during operation.

[0005] As one implementation, the flow space adjustment structure includes: An adjusting cylinder is fixedly installed inside the main body of the die head near the middle, and multiple flow grooves are opened at equal angles on the inner circumference of the adjusting cylinder. Each of the flow channels has an inner groove on its inner wall, and an adjusting block moves through the inner groove.

[0006] As one embodiment, the push-pull structure includes: Multiple sets of fixing strips are provided on the outer side of the die head body, and each set of fixing strips is positioned corresponding to the position of the adjusting block; Each of the fixed bars is provided with a guide groove, and a movable block is movably sleeved on each group of two fixed bars. A first spring is provided in the guide groove, and the two ends of the first spring are respectively connected to one end of the guide groove wall and the movable block. The moving block has a through rod fixedly passing through its center. The through rod is movably inserted into the inner groove, with one end connected to the adjusting block. The other end of the through rod is provided with a U-shaped block. The U-shaped block rotates through a first rotating shaft, and a pressure wheel is fixedly sleeved on the first rotating shaft.

[0007] As one embodiment, the rotary extrusion structure includes: A rotating cylinder is rotatably mounted on the die head body. Multiple extrusion strips are arranged on the inner wall of the rotating cylinder, and each extrusion strip is arranged corresponding to the position of the pressure roller. Each of the extrusion strips is provided with multiple extrusion sections, and the multiple extrusion sections are arranged in a stepped shape on the extrusion strip; The outer surface of the rotating cylinder is provided with anti-slip texture.

[0008] As one embodiment, the sealing structure includes: A first rotating ring is fixedly installed at the upper and lower ends of the rotating cylinder, and an annular groove for the first rotating ring to rotate is provided on the main body of the die head; Each of the annular grooves has a first sealing groove on its groove wall, and a sealing ring is provided in each of the first sealing grooves; The inner groove has a second sealing groove on both the upper and lower sides of the groove wall, and the adjusting block has a sealing block on both the upper and lower sides, and the sealing block is slidably disposed in the second sealing groove.

[0009] As one implementation, the positioning structure includes: Two protruding plates are provided on the outer side of the rotating cylinder. Grooves are formed on the protruding plates. A lifting block is slidably arranged in the groove. A second spring is connected between the lifting block and the lower wall of the groove. A positioning rod is connected to the top of the lifting block, and the positioning rod moves through the protrusion plate. A fixing ring is fixedly sleeved on the outer side of the mold head body above the rotating cylinder. Two sets of positioning holes are opened on the fixing ring, and the top of the positioning rod is movably inserted into the corresponding positioning hole.

[0010] As one embodiment, the pressing structure includes: A fixing block is fixedly installed on the outer side of the die head body at the upper edge of the groove. An extrusion block that fits the outer side of the die head body is fixedly installed on the lifting block. A pressure inclined surface is provided on the extrusion block.

[0011] As one embodiment, the dustproof sealing structure includes: Two fixed seats are provided on the outer side of the mold head body near the bottom. A second rotating shaft rotates through the fixed seats. A flipping strip is fixedly sleeved on the second rotating shaft. A sealing block is provided at one end of the flipping strip.

[0012] As one implementation, the driving structure includes: A threaded cylinder is fixedly sleeved on the die head body, and a threaded sleeve is rotatably sleeved on the threaded cylinder by means of threads, and the threaded sleeve is provided with anti-slip texture; The bottom end of the screw sleeve is rotatably provided with a second rotating ring, and two driving bars are connected below the second rotating ring. The driving bars are slidably disposed in the fixed seat. A gear is fixedly sleeved in the middle of the second rotating shaft, and the driving bars are provided with teeth that mesh with the gear.

[0013] In summary, the present invention has the following beneficial technical effects: 1. This invention sets up a flow space adjustment structure, a push-pull structure, and a rotary extrusion structure. The rotary extrusion structure can be used to adjust the flow space adjustment structure directly outside the die head body in conjunction with the push-pull structure. By adjusting the opening size of the flow channel, the flow rate of liquid plastic can be realized. This not only makes the operation simple and convenient, but also ensures stable material output from the die head body and reduces operating costs. 2. This invention ensures the stability of the die head body during operation by setting a sealing structure; 3. This invention features a positioning structure and a pressing structure. The positioning structure positions the rotating extrusion structure, ensuring the stability of the adjustment process. The pressing structure makes the operation easier and more convenient when the positioning is released and readjusted. 4. By setting up a dust-proof sealing structure and a driving structure, when the die head body is not in use, the driving structure can drive the sealing block of the dust-proof sealing structure to flip to the discharge end of the die head body to seal it, thus preventing dust and other impurities in the air from entering the die head body and causing problems that are difficult to clean. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of a die head for a blow molding machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure at the dustproof sealing point in an embodiment of the present invention; Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged view of the structure at point A; Figure 4 This is a schematic diagram of the structure at the flow space adjustment structure in an embodiment of the present invention; Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged view of the structure at point B; Figure 6 This is a schematic diagram of the internal structure of the mold head body in an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 Enlarged view of the structure at point C.

[0015] Explanation of reference numerals in the attached drawings: 1. Die head body; 2. Adjusting cylinder; 3. Flow groove; 4. Inner groove; 5. Adjusting block; 6. Fixing strip; 7. Moving block; 8. Guide groove; 9. Through rod; 10. Rotating cylinder; 11. Extrusion strip; 12. First rotating shaft; 13. Pressure roller; 14. First spring; 15. Extrusion section; 16. Annular groove; 17. First rotating ring; 18. Sealing ring; 19. First sealing groove; 20. Second sealing groove; 21. Sealing block; 22. Protruding plate; 23. Groove; 24. Lifting block; 25. Second spring; 26. Positioning rod; 27. Positioning hole; 28. Fixing ring; 29. ​​Fixing block; 30. Extrusion block; 31. Tilting strip; 32. Sealing block; 33. Threaded cylinder; 34. Threaded sleeve; 35. Second rotating ring; 36. Driving strip; 38. Second rotating shaft; 39. Fixed seat; 40. Gear; 41. U-shaped block. Detailed Implementation

[0016] The following is in conjunction with the appendix Figures 1-7 The present invention will be described in further detail below.

[0017] This invention discloses a die head for a blow molding machine. (Refer to...) Figures 1-7A die head for a blow molding machine includes: a die head body 1; a flow space adjustment structure disposed within the die head body 1 to adjust the flow rate of liquid plastic; a push-pull structure disposed within the die head body 1 to control the flow space adjustment structure and adjust the size of the liquid plastic flow space within the die head body 1; a rotary extrusion structure disposed on the outer side of the die head body 1 to control the flow space adjustment structure on the outside of the die head body 1; a sealing structure disposed within the die head body 1 for sealing; a positioning structure disposed between the rotary extrusion structure and the die head body 1 for positioning the rotary extrusion structure; a pressing structure disposed on the rotary extrusion structure for pressing to release the positioning of the positioning structure; a sealing and dustproof structure disposed near the discharge end of the die head body 1 for sealing the discharge end of the die head body 1; and a driving structure disposed on the outer side of the die head body 1 near the bottom end to control the sealing and opening of the sealing and dustproof structure.

[0018] See Figures 4-7 The flow space adjustment structure includes: an adjustment cylinder 2 fixedly installed inside the die head body 1 near the center, with multiple flow grooves 3 opened at equal angles on the inner circumference of the adjustment cylinder 2; an inner groove 4 is opened on the inner wall of each flow groove 3, and an adjustment block 5 moves through the inner groove 4; the push-pull structure includes: multiple sets of fixing strips 6 set on the outer side of the die head body 1, each set of fixing strips 6 corresponding to the position of the adjustment block 5; a guide groove 8 is opened on each fixing strip 6, and a moving block 7 is movably sleeved on each set of two fixing strips 6; a first spring 14 is set in the guide groove 8, and the two ends of the first spring 14 are respectively connected to one end of the guide groove 8 and the moving block 7; a through rod 9 is fixedly passed through the middle of the moving block 7, and one end of the through rod 9 is movably inserted into the inner groove 4 and connected to the adjustment block 5; a U-shaped block 41 is set on the other end of the through rod 9, and a first rotating shaft 12 is rotatably passed through the U-shaped block 41, and a pressure roller 13 is fixedly sleeved on the first rotating shaft 12; the rotary extrusion structure includes: a rotating cylinder 1 rotatably installed on the die head body 1. 0. The inner wall of the rotating cylinder 10 is provided with multiple extrusion strips 11, each extrusion strip 11 corresponding to the position of the pressure roller 13; each extrusion strip 11 is provided with multiple extrusion parts 15, which are arranged in a stepped shape on the extrusion strip 11; the outer surface of the rotating cylinder 10 is provided with anti-slip texture, and the flow speed of liquid plastic is adjusted by moving and extruding different extrusion parts 15 on the extrusion strip 11 to the pressure roller 13; the sealing structure includes: a first rotating ring 17 fixedly set at the upper and lower ends of the rotating cylinder 10, and an annular groove 16 for the first rotating ring 17 to rotate on the die head body 1; a first sealing groove 19 is opened on the groove wall of each annular groove 16, and a sealing ring 18 is provided in each first sealing groove 19; a second sealing groove 20 is opened on the upper and lower side walls of the inner groove 4; a sealing block 21 is provided on the upper and lower sides of the adjusting block 5, and the sealing block 21 is slidably set in the second sealing groove 20. The sealing ring 18 and the sealing block 21 are used to ensure the sealing of the die head body 1; The positioning structure includes: two protruding plates 22 disposed on the outer surface of the rotating cylinder 10, with grooves 23 formed on the protruding plates 22, and a lifting block 24 slidably disposed in the grooves 23, with a second spring 25 connecting the lifting block 24 and the lower wall of the groove 23; a positioning rod 26 is connected to the lifting block 24, and the positioning rod 26 movably extends out of the protruding plates 22; a fixing ring 28 is fixedly sleeved on the outer side of the die head body 1 above the rotating cylinder 10, with two sets of positioning holes 27 formed on the fixing ring 28, and the top of the positioning rod 26 movably inserts into the corresponding positioning hole 27; the pressing structure includes: A fixing block 29 is fixedly installed on the outer side of the mold head body 1 at the upper edge of the groove 23. An extrusion block 30, which fits against the outer side of the mold head body 1, is fixedly installed on the lifting block 24. The extrusion block 30 is provided with a pressure-receiving slope. When it is necessary to adjust the liquid plastic output, the operator only needs to press between the fixing block 29 and the extrusion block 30 with his finger to push the extrusion block 30 to move, thereby causing the lifting block 24 to move down in the groove 23, and pulling the top of the positioning rod 26 out of the positioning hole 27 on the fixing ring 28, thus releasing the rotation cylinder 10 on the mold head body 1. After positioning, the rotating cylinder 10 is rotated on the die head body 1, which drives the extrusion strip 11 to extrude the pressure roller 13, and pushes the adjusting block 5 to move in the flow groove 3. By adjusting the size of the flow space in the flow groove 3, the output of the hydraulic plastic can be flexibly adjusted. After adjustment, the finger is removed from the fixed block 29 and the extrusion block 30. Under the elastic force of the second spring 25, the lifting block 24 is pushed to move up and reset, which drives the top of the positioning rod 26 to insert into the corresponding positioning hole 27 for repositioning, ensuring the stability of the flow of liquid plastic after adjustment.

[0019] See Figures 1-3 The dustproof sealing structure includes: two fixed seats 39 located on the outer side of the die head body 1 near the bottom; a second rotating shaft 38 rotates through the fixed seats 39; a flipping strip 31 is fixedly sleeved on the second rotating shaft 38; a sealing block 32 is provided at one end of the flipping strip 31; the driving structure includes: a threaded cylinder 33 fixedly sleeved on the die head body 1; a threaded sleeve 34 is rotatably sleeved on the threaded cylinder 33 via threads; the threaded sleeve 34 is provided with anti-slip texture; a second rotating ring 35 is rotatably provided at the bottom end of the threaded sleeve 34; two driving strips 36 are connected below the second rotating ring 35; the driving strips 36 slide... The die head body 1 is placed in the fixed base 39. A gear 40 is fixedly sleeved in the middle of the second rotating shaft 38. The driving bar 36 is provided with teeth that mesh with the gear 40. When the die head body 1 is not in use, the threaded sleeve 34 on the threaded cylinder 33 is rotated upward, which drives the driving bar 36 on the second rotating ring 35 to move on the fixed base 39. The gear 40 drives the second rotating shaft 38 to rotate, which drives the sealing block 32 of the two flipping bars 31 to be spliced ​​to the discharge end of the die head body 1 to seal it and prevent dust and other impurities in the air from entering the die head body 1 and causing problems that are difficult to clean.

[0020] The implementation principle of a die head for a blow molding machine according to an embodiment of the present invention is as follows: When it is necessary to adjust the output of liquid plastic, the operator only needs to press between the fixed block 29 and the extrusion block 30 with his / her finger to push the extrusion block 30 to move, thereby causing the lifting block 24 to move down in the groove 23, pulling the top of the positioning rod 26 out of the positioning hole 27 on the fixed ring 28, releasing the positioning of the rotating cylinder 10 on the die head body 1. Then, the rotating cylinder 10 is rotated on the die head body 1, causing the extrusion strip 11 to squeeze the pressure roller 13, pushing the adjusting block 5 to move in the flow groove 3. By adjusting the size of the flow space in the flow groove 3, the output of the hydraulic plastic can be flexibly adjusted. After adjustment, the output of the liquid plastic is released from the fixed block 29. 9. The fingers are removed from the extrusion block 30. Under the elastic force of the second spring 25, the lifting block 24 is pushed to move up and reset, which drives the top of the positioning rod 26 to be inserted into the corresponding positioning hole 27 for repositioning. This ensures the stability of the liquid plastic flow after adjustment. When the mold head body 1 is not in use, the screw sleeve 34 is rotated upward on the threaded cylinder 33, which drives the driving bar 36 on the second rotating ring 35 to move on the fixed seat 39. The gear 40 drives the second rotating shaft 38 to rotate, which drives the sealing block 32 of the two flipping bars 31 to be spliced ​​to the discharge end of the mold head body 1 for sealing. This prevents dust and other impurities in the air from entering the mold head body 1 and causing problems that are not easy to clean. The operation is also simple and convenient.

[0021] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A die head for a blow molding machine, characterized in that, include: Mold head body (1); A flow space adjustment structure is set inside the main body of the mold head (1) to adjust the flow rate of liquid plastic; A push-pull structure is provided inside the mold head body (1) to control the flow space adjustment structure, thereby adjusting the size of the liquid plastic flow space inside the mold head body (1); A rotary extrusion structure is provided on the outer side of the die head body (1), and a flow space adjustment structure is provided on the outer side of the die head body (1); A sealing structure is provided in the die head body (1) for sealing operation; A positioning structure is provided between the rotary extrusion structure and the die head body (1) to position the rotary extrusion structure; A pressing structure is provided on the rotary extrusion structure, and pressing releases the positioning structure from its positioning position. A dustproof sealing structure is provided near the discharge end of the die head body (1) to block the discharge end of the die head body (1); The drive structure is located on the outer side of the main body of the mold head (1) near the bottom end, and controls the sealing and dustproof structure to seal or open.

2. The die head for a blow molding machine according to claim 1, characterized in that, The flow space adjustment structure includes: An adjusting cylinder (2) is fixedly installed in the main body (1) near the middle. Multiple flow grooves (3) are opened at equal angles on the inner wall of the adjusting cylinder (2). Each of the flow channels (3) has an inner groove (4) on its inner wall, and an adjusting block (5) moves through the inner groove (4).

3. A die head for a blow molding machine according to claim 2, characterized in that: The push-pull structure includes: Multiple sets of fixing strips (6) are provided on the outer side of the mold head body (1), and each set of fixing strips (6) is set at the position of the adjusting block (5); Each of the fixed strips (6) is provided with a guide groove (8), and each set of two fixed strips (6) is provided with a movable block (7). A first spring (14) is provided in the guide groove (8), and the two ends of the first spring (14) are respectively connected to one end of the guide groove (8) and the movable block (7). The moving block (7) has a through rod (9) fixedly passing through its middle. The through rod (9) is movably inserted into the inner groove (4) and one end is connected to the adjusting block (5). The other end of the through rod (9) is provided with a U-shaped block (41). The U-shaped block (41) rotates through the first rotating shaft (12). The first rotating shaft (12) is fixedly fitted with a pressure wheel (13).

4. A die head for a blow molding machine according to claim 3, characterized in that: The rotary extrusion structure includes: A rotating cylinder (10) is rotatably mounted on the die head body (1). Multiple extrusion strips (11) are provided on the inner wall of the rotating cylinder (10), and each extrusion strip (11) is positioned corresponding to the pressure roller (13). Each of the extrusion strips (11) is provided with a plurality of extrusion portions (15), and the plurality of extrusion portions (15) are arranged in a stepped shape on the extrusion strip (11); The outer surface of the rotating cylinder (10) is provided with anti-slip texture.

5. A die head for a blow molding machine according to claim 4, characterized in that: The sealing structure includes: The first rotating ring (17) is fixedly installed at the upper and lower ends of the rotating cylinder (10), and the die head body (1) is provided with an annular groove (16) for the first rotating ring (17) to rotate. Each of the annular grooves (16) has a first sealing groove (19) on its groove wall, and each of the first sealing grooves (19) has a sealing ring (18). The inner groove (4) has a second sealing groove (20) on both the upper and lower sides of the groove wall, and the adjusting block (5) has a sealing block (21) on both the upper and lower sides. The sealing block (21) is slidably disposed in the second sealing groove (20).

6. A die head for a blow molding machine according to claim 5, characterized in that: The positioning structure includes: Two protruding plates (22) are provided on the outer side of the rotating cylinder (10). A groove (23) is provided on the protruding plate (22). A lifting block (24) is slidably provided in the groove (23). A second spring (25) is connected between the lifting block (24) and the lower wall of the groove (23). The lifting block (24) is connected to a positioning rod (26), and the positioning rod (26) extends through the protrusion plate (22). The outer side of the mold head body (1) is fixedly fitted with a fixing ring (28) above the rotating cylinder (10). Two sets of positioning holes (27) are opened on the fixing ring (28). The top of the positioning rod (26) is movably inserted into the corresponding positioning hole (27).

7. A die head for a blow molding machine according to claim 6, characterized in that: The pressing structure includes: A fixing block (29) is fixedly installed on the outer side of the mold head body (1) at the upper edge of the groove (23). An extrusion block (30) that fits the outer side of the mold head body (1) is fixedly installed on the lifting block (24). A pressure inclined surface is provided on the extrusion block (30).

8. A die head for a blow molding machine according to claim 1, characterized in that: The dustproof sealing structure includes: Two fixing seats (39) are set on the outer side of the main body of the mold head (1) near the bottom. The fixing seats (39) rotate through the second rotating shaft (38). A flipping strip (31) is fixedly sleeved on the second rotating shaft (38). A sealing block (32) is set at one end of the flipping strip (31).

9. A die head for a blow molding machine according to claim 8, characterized in that: The driving structure includes: A threaded cylinder (33) is fixedly sleeved on the main body (1) of the die head. A threaded sleeve (34) is rotatably sleeved on the threaded cylinder (33) by means of the thread. The threaded sleeve (34) is provided with anti-slip texture. The bottom end of the screw sleeve (34) is rotatably provided with a second rotating ring (35), and two driving bars (36) are connected below the second rotating ring (35). The driving bars (36) are slidably disposed in the fixed seat (39). A gear (40) is fixedly sleeved in the middle of the second rotating shaft (38), and the driving bars (36) are provided with teeth that mesh with the gear (40).

Images