A floating positioning needle assembly for floating injection molding

Abstract

The present invention discloses a floating positioning needle assembly for floating injection molding, which relates to the field of injection molding technology. The assembly comprises: a positioning needle body mounted on the outside of a mold body, wherein the upper end of the positioning needle body is connected to a needle sleeve via a fixing component. The present invention activates an electric push rod, and when the electric push rod pushes a driving plate to move, the driving plate drives the positioning needle body to slide in a sealing sleeve, thereby driving the positioning needle body to be inserted into the mold body. The electric push rod continues to push the driving plate to move, and a driving ring on the needle sleeve contacts the upper end of the moving sleeve, driving the moving sleeve to move. The moving sleeve drives the moving ring to move in a limiting groove through a compression spring until the moving ring contacts the upper end of the moving groove, thereby limiting the moving ring and the positioning needle body. This guides and limits the positioning needle body, allowing it to be accurately and stably inserted into the mold body, making it easy to adjust and tightly fitting with the mold.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a floating positioning needle assembly for floating injection molding. Background Art

[0002] Injection molding, one of the most widely used molding methods in the plastics processing industry, focuses on injecting molten plastic into a pre-designed mold cavity. Once the plastic cools and solidifies, a plastic product conforms to the mold cavity's shape. With the increasing application of plastic products, the requirements for precision, surface quality, and production efficiency of injection molded products are also increasing. In the specialized process of float injection molding, in particular, due to the complex product structure and specialized demolding requirements, traditional fixed positioning pins often fail to meet the requirements for high-precision positioning and smooth demolding, leading to increased product defects, increased mold wear, and low production efficiency.

[0003] Floating injection molding, an advanced process that combines floating core pulling with injection molding, relies on a floating core pulling mechanism within the mold. This mechanism, through a specific drive method (such as hydraulic, pneumatic, or mechanical force), enables relative movement of a mold portion (usually the core) after injection, enabling smooth demolding of complex products. However, existing floating locating pin designs often suffer from deficiencies such as insufficient positioning accuracy, difficulty in adjustment, wear, and a loose fit with the mold, severely limiting the full potential of the floating injection molding process. Summary of the Invention

[0004] The present invention provides a floating positioning needle assembly for floating injection molding, which solves the problems of the existing floating positioning needle design mentioned in the background art, such as insufficient positioning accuracy, difficulty in adjustment, easy wear and loose fit with the mold.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A floating positioning needle assembly for floating injection molding, comprising: a positioning needle body mounted on the outside of a mold body, the upper end of the positioning needle body being connected to a needle sleeve via a fixing component, a piston cylinder being fixedly mounted on the outer side of the lower end of the needle sleeve, and a movable sleeve being connected via the piston cylinder, a movable ring being fixedly mounted on the outer wall of the lower end of the movable sleeve, and a plurality of springs being evenly fixedly mounted on the lower end of the movable ring;

[0006] The outer end of the needle sleeve is installed with a sliding sleeve through a connecting component. The outer end of the sliding sleeve is symmetrically fixed with two guide rods. The outer end of the movable sleeve is sleeved with a fixed plate. The upper end of the fixed plate is symmetrically fixed with two guide cylinders. The lower end of the guide rod can be slidably inserted into the guide cylinder.

[0007] A limiting groove is provided at the outer end of the mold body, a movable groove is provided at the bottom end of the limiting groove, a through hole is provided at the bottom end of the movable groove, the through hole is connected to the inner end of the mold body, a sealing sleeve is fixedly installed in the through hole, and the movable ring is fixed in the limiting groove through the fixed plate. At the same time, the lower end of the spring contacts the inner wall of the bottom end of the movable groove, the positioning pin body passes through the sealing sleeve, and the upper end of the fixed plate is installed with a driving component.

[0008] Furthermore, the fixing component includes a positioning groove, a fixing rod, a connecting rod and a hexagonal groove. The positioning grooves and the fixing rod are respectively provided in a plurality and are evenly arranged at the lower end of the needle sleeve. The fixing rod is evenly fixed on the outer wall of one end of the positioning needle body. When the positioning needle body is inserted into the needle sleeve, the fixing rod can be located in the positioning groove.

[0009] Furthermore, the hexagonal groove is opened at the upper end of the needle sleeve, and a large nut is placed in the hexagonal groove. The internal thread of the large nut is connected to a threaded barrel. The upper end of the threaded barrel is fixedly installed with a driving block, and a connecting rod 2 is fixedly installed in the driving block. The outer end of the driving block is sleeved with a rubber sleeve, and the connecting rod 1 is fixedly installed on the upper end of the positioning needle body. The connecting rod 1 and the connecting rod 2 brackets are tied with a connecting rope.

[0010] Furthermore, the connecting component includes a limiting ring, a driving ring and a fastening nut. The limiting ring is fixedly sleeved on the outer wall of the needle sleeve. A threaded groove is provided on the outer wall of the upper end of the needle sleeve. The driving ring is fixedly installed on the lower end of the sliding sleeve. The fastening nut is threadedly connected to the outer end of the needle sleeve through the threaded groove. When the lower end of the fastening nut contacts the upper end of the sliding sleeve, the lower end of the sliding sleeve contacts the upper end of the limiting ring.

[0011] Furthermore, the fixed plate is in the shape of a circular ring, and is fixed to the outer wall of the mold body by fixing bolts, and the fixed plate is located outside the outer end of the limiting groove, the diameter of the limiting groove is larger than the diameter of the movable groove, and the diameter of the movable groove is larger than the diameter of the through hole. The outer wall of the movable ring and the inner wall of the limiting groove are slidably connected, the outer diameter of the movable ring is larger than the inner diameter of the fixed plate, and when the spring is in a balanced state, the upper end of the movable ring and the lower end of the fixed plate are in conflict.

[0012] Furthermore, the driving component includes a connecting plate, an electric push rod and a fixing nut. Connecting blocks are fixedly installed on both ends of the connecting plate. The connecting blocks are semicircular and can be fixed to the upper end of the fixing plate by fixing bolts.

[0013] Furthermore, a driving plate is provided at the upper end of the connecting plate, ear plates are fixedly installed on four sides of the lower end of the driving plate, and slide rails are fixedly installed on four sides of the upper end of the connecting plate.

[0014] Furthermore, each of the slide rails is slidably connected to a rotating rod through a slider, and the end of the rotating rod away from the slide rail is rotatably connected through an axle pin and an ear plate, and the rotating rods on the left and right sides of the upper end of the connecting plate are cross-arranged.

[0015] Furthermore, a horizontal plate is fixedly installed between the two rotating rods, the upper end of the horizontal plate is rotatably connected to one end of the electric push rod through a rotating block, and the other end of the electric push rod is rotatably connected to the lower end of the driving plate through the rotating block.

[0016] Furthermore, fixing holes are provided on both sides of the upper end of the driving plate. The diameter of the fixing holes is larger than the diameter of the threaded barrel and smaller than the outer diameter of the large nut. The driving plate is sleeved on the outer end of the threaded barrel through the fixing holes. The fixing nut is threadedly connected to the outer wall of the threaded barrel and contacts the upper end of the driving plate.

[0017] The present invention provides a floating positioning needle assembly for floating injection molding. It has the following beneficial effects:

[0018] The present invention starts an electric push rod, and when the electric push rod pushes the driving plate to move, the driving plate drives the threaded cylinder to move, and the threaded cylinder drives the needle sleeve to move, and the needle sleeve slides in the movable sleeve through the piston cylinder, and at the same time drives the positioning needle body to slide in the sealing sleeve, thereby driving the positioning needle body to be inserted into the mold body, and the electric push rod continues to push the driving plate to move, and the driving plate continues to push the threaded cylinder and the needle sleeve to move, and the driving ring on the needle sleeve contacts the upper end of the movable sleeve and drives the movable sleeve to move, and the movable sleeve drives the movable ring to move in the limiting groove through the compression spring until the movable ring contacts the upper end of the movable groove, thereby limiting the movable ring and also limiting the positioning needle body, thereby guiding and limiting the positioning needle body, allowing it to be accurately and stably inserted into the mold body, easy to adjust and tightly matched with the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified view of the structure of the middle A area;

[0022] Figure 4 This is a schematic diagram of the connection between the needle sleeve and the driving component of the present invention;

[0023] Figure 5 This is a schematic diagram of the needle sleeve and the driving component of the present invention;

[0024] Figure 6 It is a three-dimensional schematic diagram of a part of the structure of the present invention;

[0025] Figure 7 This is a top view of the fixed plate and the movable ring of the present invention;

[0026] Figure 8This is a bottom view of the fixed plate and the movable ring of the present invention;

[0027] Figure 9 This is a schematic diagram of the connection between the positioning needle and the needle sleeve of the present invention;

[0028] Figure 10 This is a bottom view of the positioning needle and needle sleeve of the present invention;

[0029] Figure 11 This is a top view of the positioning needle and needle sleeve of the present invention.

[0030] In the figure: 1. mold body; 2. moving groove; 3. through hole; 4. limiting groove; 5. sealing sleeve; 6. positioning needle body; 7. needle sleeve; 8. piston cylinder; 9. positioning groove; 10. limiting ring; 11. threaded groove; 12. fixing rod; 13. connecting rod 1; 14. connecting rope; 15. threaded cylinder; 16. driving block; 17. hexagonal groove; 18. large nut; 19. connecting rod 2; 20. rubber sleeve; 21. sliding sleeve; 22. driving ring; 23. guide rod; 24. fastening nut; 25. fixing plate; 26. guide cylinder; 27. fixing bolt; 28. moving sleeve; 29. ​​moving ring; 30. spring; 31. connecting plate; 32. slide rail; 33. connecting block; 34. rotating rod; 35. ear plate; 36. cross plate; 37. electric push rod; 38. driving plate; 39. fixing hole; 40. fixing nut. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0032] See also Figure 1-11The present invention provides a technical solution: a floating positioning needle assembly for floating injection molding, comprising: a positioning needle body 6 installed on the outside of the mold body 1, the upper end of the positioning needle body 6 is connected to a needle sleeve 7 through a fixing component, a piston cylinder 8 is fixedly installed on the outer side of the lower end of the needle sleeve 7, and is connected to a movable sleeve 28 through the piston cylinder 8, the lower end of the needle sleeve 7 passes through the movable sleeve 28, and the piston cylinder 8 is inserted into the movable sleeve 28, the outer wall of the piston cylinder 8 and the inner wall of the movable sleeve 28 are slidably connected, when the needle sleeve 7 moves, the piston cylinder 8 can seal between the needle sleeve 7 and the movable sleeve 28 to prevent foreign matter from entering the mold body 1 through the movable sleeve 28, and also guide the needle sleeve 7, a moving ring 29 is fixedly installed on the outer wall of the lower end of the movable sleeve 28, and a plurality of springs 30 are evenly fixedly installed on the lower end of the moving ring 29, when the moving ring 29 is slidably inserted into the limiting groove 4, the other end of the spring 30 contacts the inner wall of the bottom end of the limiting groove 4, and the moving ring 29 can slide in the limiting groove 4 by compressing the spring 30.

[0033] A limiting groove 4 is provided at the outer end of the mold body 1, and a moving groove 2 is provided at the bottom end of the limiting groove 4. The inner diameter of the moving groove 2 is smaller than the inner diameter of the limiting groove 4, and the inner diameter of the moving groove 2 is smaller than the diameter of the moving ring 29. When the moving ring 29 slides in the limiting groove 4 through the compression spring 30, the moving groove 2 limits the moving distance of the moving ring 29. A through hole 3 is provided at the bottom end of the moving groove 2, and the through hole 3 is connected to the inner end of the mold body 1. A sealing sleeve 5 is fixedly installed in the through hole 3. The sealing sleeve 5 is made of high-temperature resistant rubber. The sealing sleeve 5 serves to seal between the positioning pin body 6 and the through hole 3 to prevent the injected molten metal from flowing into the through hole 3 during injection molding.

[0034] The movable ring 29 is fixed in the limiting groove 4 by the fixing plate 25. The fixing plate 25 is annular and has a plurality of bolt holes. The outer wall of the mold body 1 has a plurality of threaded holes corresponding to the bolt holes. The fixing plate 25 is placed on the outer end of the limiting groove 4, and then one end of the fixing bolt 27 is passed through the bolt hole and threadedly connected with the inner wall of the threaded hole, thereby fixing the fixing plate 25 on the outer wall of the mold body 1. The fixing plate 25 is located on the outer wall of the movable ring 29, thereby pressing the movable ring 29 into the limiting groove 4. At the same time, the lower end of the spring 30 The end of the movable ring 29 contacts the inner wall of the bottom end of the movable groove 2, so that the upper end of the movable ring 29 contacts the inner end of the fixed plate 25. The fixed plate 25 is located outside the outer end of the limiting groove 4. The diameter of the limiting groove 4 is larger than the diameter of the movable groove 2. The diameter of the movable groove 2 is larger than the diameter of the through hole 3. The outer wall of the movable ring 29 and the inner wall of the limiting groove 4 are slidingly connected. The outer diameter of the movable ring 29 is larger than the inner diameter of the fixed plate 25. When the spring 30 is in a balanced state, the upper end of the movable ring 29 contacts the lower end of the fixed plate 25, and the movable ring 29 can slide in the limiting groove 4 by compressing the spring 30.

[0035] A driving component is installed at the upper end of the fixing plate 25, which can drive the needle sleeve 7 and the positioning needle body 6 to move. The driving component includes a connecting plate 31, an electric push rod 37 and a fixing nut 40. Connecting blocks 33 are fixedly installed on both ends of the connecting plate 31. The connecting block 33 is semicircular, and the diameter of the connecting block 33 is the same as the diameter of the fixing plate 25. Bolt holes corresponding to the fixing bolts 27 are opened on the side walls of the connecting block 33. The connecting block 33 can be fixed to the upper end of the fixing plate 25 by the fixing bolts 27. When it is necessary to fix the connecting plate 31, the connecting blocks 33 at the left and right ends of the connecting plate 31 are respectively placed on the upper ends of the two fixing plates 25, and then the fixing bolts 27 are respectively passed through the bolt holes on the connecting block 33 and the fixing plate 25 and threadedly connected to the inner wall of the threaded hole, thereby fixing the connecting plate 31.

[0036] The upper end of the connecting plate 31 is provided with a driving plate 38, and ear plates 35 are fixedly installed on the four sides of the lower end of the driving plate 38. The four sides of the upper end of the connecting plate 31 are fixedly installed with slide rails 32. Each slide rail 32 is slidably connected to a rotating rod 34 through a slider. The slider and the slide rail 32 are both convex, and the slider can slide freely in the slide rail 32. At the same time, the upper end of the slider passes through the slide rail 32 and is rotatably connected to one end of the rotating rod 34. The end of the rotating rod 34 away from the slide rail 32 is rotatably connected to the ear plate 35 by an axle pin. The rotating rods 34 on the left and right sides of the upper end of the connecting plate 31 are cross-arranged. When the rotating rod 34 rotates, one end of the rotating rod 34 rotates on the ear plate 35, and the other end of the rotating rod 34 rotates on the slider while sliding in the slide rail 32 through the slider, thereby realizing the lifting and lowering of the driving plate 38.

[0037] A horizontal plate 36 is fixedly installed between the two rotating rods 34. The upper end of the horizontal plate 36 is rotatably connected to one end of an electric push rod 37 through a rotating block. The other end of the electric push rod 37 is rotatably connected to the lower end of a driving plate 38 through a rotating block. The electric push rod 37 is externally connected to a power supply. When the electric push rod 37 is started, it can drive the rotating rod 34 to rotate, thereby pushing the driving plate 38 to move up and down.

[0038] A fixing hole 39 is provided on both sides of the upper end of the driving plate 38. The diameter of the fixing hole 39 is larger than the diameter of the threaded barrel 15, and the diameter of the fixing hole 39 is smaller than the outer diameter of the large nut 18. The driving plate 38 is sleeved on the outer end of the threaded barrel 15 through the fixing hole 39 and overlapped on the upper end of the large nut 18. The fixing nut 40 is threadedly connected to the outer wall of the threaded barrel 15 and contacts the upper end of the driving plate 38. The driving plate 38 is fixed to the outer end of the threaded barrel 15 by tightening the fixing nut 40. When the electric push rod 37 pushes the driving plate 38 to move, the driving plate 38 drives the threaded barrel 15 to move, and the threaded barrel 15 drives the needle sleeve 7 to move. The needle sleeve 7 moves in the movable sleeve 2 through the piston cylinder 8. 8 slides in the mold body, and at the same time drives the positioning needle body 6 to slide in the sealing sleeve 5, thereby driving the positioning needle body 6 to be inserted into the mold body 1, and the electric push rod 37 continues to push the driving plate 38 to move, and the driving plate 38 continues to push the threaded cylinder 15 and the needle sleeve 7 to move, and the driving ring 22 on the needle sleeve 7 contacts the upper end of the movable sleeve 28 and drives the movable sleeve 28 to move. The movable sleeve 28 drives the movable ring 29 to move in the limiting groove 4 through the compression spring 30 until the movable ring 29 contacts the upper end of the movable groove 2, limiting the movable ring 29, and also limiting the positioning needle body 6, which guides and limits the positioning needle body 6, allowing it to be accurately and stably inserted into the mold body 1.

[0039] Specifically, first install the sealing sleeve 5 in the through hole 3, then insert one end of the positioning needle body 6 into the sealing sleeve 5 from the inner end of the mold body 1 and pass through the outer side of the mold body 1, and then fix it with one end of the needle sleeve 7 through the fixing component, and then put the movable sleeve 28 on the outer end of the needle sleeve 7, put the fixing plate 25 on the outer end of the movable sleeve 28, and then slide the movable ring 29 at the lower end of the movable sleeve 28 into the limiting groove 4, first fix one side of the fixing plate 25 to the outer end of the mold body 1 with a fixing bolt 27, and then place the connecting plate 31 and the connecting block 33 at the upper end between the two fixing plates 25, and then fix it to the outer end of the mold body 1 with the fixing bolt 27. At this time, the lower end of the spring 30 contacts the inner wall of the bottom end of the limiting groove 4, and the upper end of the movable ring 29 contacts the lower end of the fixed plate 25. Finally, the driving plate 38 is fixed to the threaded barrel 1 by the fixing nut 40. 5, when the electric push rod 37 pushes the driving plate 38 to move, the driving plate 38 drives the threaded cylinder 15 to move, and the threaded cylinder 15 drives the needle sleeve 7 to move. The needle sleeve 7 slides in the movable sleeve 28 through the piston cylinder 8, and at the same time drives the positioning needle body 6 to slide in the sealing sleeve 5, thereby driving the positioning needle body 6 to be inserted into the mold body 1, and the electric push rod 37 continues to push the driving plate 38 to move. The driving plate 38 continues to push the threaded cylinder 15 and the needle sleeve 7 to move. The driving ring 22 on the needle sleeve 7 contacts the upper end of the movable sleeve 28 and drives the movable sleeve 28 to move. The movable sleeve 28 drives the movable ring 29 to move in the limiting groove 4 through the compression spring 30 until the movable ring 29 contacts the upper end of the movable groove 2, thereby limiting the movable ring 29 and also limiting the positioning needle body 6, thereby guiding and limiting the positioning needle body 6, so that it can be accurately and stably inserted into the mold body 1.

[0040] like Figure 6 、 Figure 7 and Figure 8As shown, in some embodiments, a sliding sleeve 21 is installed on the outer end of the needle sleeve 7 through a connecting component, and two guide rods 23 are symmetrically fixedly installed on the outer end of the sliding sleeve 21. The guide rods 23 are L-shaped, and one end of the guide rods 23 is fixed to the outer end of the sliding sleeve 21, and the other end is parallel to the sliding sleeve 21. The sliding sleeve 21 can rotate on the outer end of the needle sleeve 7 with the two guide rods 23. The outer end of the movable sleeve 28 is sleeved with a fixed plate 25, and the upper end of the fixed plate 25 is symmetrically fixedly installed with two guide cylinders 26. The inner diameter of the guide cylinders 26 is larger than the diameter of the guide rods 23, and the lower ends of the guide rods 23 can be slidably inserted into the guide cylinders 26. The connecting components include a limit ring 10, a drive ring 22 and a fastening nut 2 4. The limiting ring 10 is fixedly sleeved on the outer wall of the needle sleeve 7. A threaded groove 11 is provided on the outer wall of the upper end of the needle sleeve 7. The driving ring 22 is fixedly mounted on the lower end of the sliding sleeve 21. The fastening nut 24 is threadedly connected to the outer end of the needle sleeve 7 through the threaded groove 11. When the lower end of the fastening nut 24 contacts the upper end of the sliding sleeve 21, the lower end of the sliding sleeve 21 contacts the upper end of the limiting ring 10. At the same time, the lower end of the guide rod 23 is inserted into the guide cylinder 26. More specifically, when the electric push rod 37 pushes the driving plate 38 to move, the driving plate 38 pushes the needle sleeve 7 to move and the positioning needle body 6 to move, the guide rod 23 slides in the guide cylinder 26 to guide the positioning needle body 6 to ensure stable movement.

[0041] like Figure 9 Figure 10 and Figure 11As shown, in some embodiments, the fixing component includes a positioning groove 9, a fixing rod 12, a connecting rod 13 and a hexagonal groove 17. The positioning groove 9 and the fixing rod 12 are respectively provided with a plurality of them and are evenly opened at the lower end of the needle sleeve 7. The fixing rod 12 is evenly fixedly installed on the outer wall of one end of the positioning needle body 6. The size of the positioning groove 9 is slightly larger than the size of the fixing rod 12. When the positioning needle body 6 is inserted into the needle sleeve 7, the fixing rod 12 can be located in the positioning groove 9 to limit the positioning needle body 6. The hexagonal groove 17 is opened at the upper end of the needle sleeve 7. The hexagonal groove 17 is connected to the inner end of the needle sleeve 7. The size of the hexagonal groove 17 is slightly larger than the size of the large nut 18. The large nut 18 is placed in the hexagonal groove 17. The inner diameter of the large nut 18 is smaller than the inner diameter of the needle sleeve 7. The threaded cylinder 15 is connected to the inner thread of the large nut 18. The lower end of the threaded cylinder 15 is inserted into the needle sleeve 7. The upper end of the threaded cylinder 15 is fixedly installed with a driving block 16. The driving block 16 is fixedly installed with The connecting rod 2 19 and the driving block 16 are in the shape of an equilateral hexagonal cylinder, which is convenient for connecting with a hexagonal wrench. The threaded cylinder 15 is driven to rotate by the hexagonal wrench, and the connecting rod 13 is fixedly installed on the upper end of the positioning needle body 6. The connecting rod 13 and the connecting rod 2 19 bracket are tied with a connecting rope 14. The outer end of the driving block 16 is sleeved with a rubber sleeve 20 to seal the upper end of the driving block 16 to prevent foreign matter from entering the threaded cylinder 15. More specifically, one end of the connecting rope 14 is first tied to the upper end of the connecting rod 13, and then the other end of the connecting rope 14 is passed through the needle sleeve 7 and the threaded cylinder 15, so that the fixing rod 12 is located in the positioning groove 9, and at the same time, the other end of the connecting rope 14 is tied to the connecting rod 2 19, and then the threaded cylinder 15 is driven to rotate and move it to the outside of the large nut 18 to tighten the connecting rope 14, thereby fixing the positioning needle body 6. The positioning needle body 6 can be removed by reversing the threaded cylinder 15, which facilitates the replacement of the positioning needle body 6.

[0042] Working principle:

[0043] Step 1: First install the sealing sleeve 5 in the through hole 3, then insert one end of the positioning needle body 6 into the sealing sleeve 5 from the inner end of the mold body 1 and pass through the outer side of the mold body 1, and then fix it with one end of the needle sleeve 7 through the fixing component, and then sleeve the movable sleeve 28 on the outer end of the needle sleeve 7, install the sliding sleeve 21 on the outer end of the needle sleeve 7 through the connecting component, sleeve the fixing plate 25 on the outer end of the movable sleeve 28, let the lower end of the guide rod 23 slide into the guide cylinder 26, and then move the lower end of the movable sleeve 28 to the right side. The movable ring 29 is slidably inserted into the limiting groove 4. One side of the fixed plate 25 is first fixed to the outer end of the mold body 1 with the fixing bolt 27. Then, the connecting plate 31 and the connecting block 33 are placed at the upper end between the two fixed plates 25. Then, the fixing bolts 27 are used to fix them to the outer end of the mold body 1. At this time, the lower end of the spring 30 contacts the inner wall of the bottom end of the limiting groove 4, and the upper end of the movable ring 29 contacts the lower end of the fixed plate 25. Finally, the driving plate 38 is fixed to the upper end of the threaded cylinder 15 by the fixing nut 40.

[0044] The second step is to start the electric push rod 37, and when the electric push rod 37 pushes the driving plate 38 to move, the driving plate 38 drives the threaded cylinder 15 to move, and the threaded cylinder 15 drives the needle sleeve 7 to move. The needle sleeve 7 slides in the movable sleeve 28 through the piston cylinder 8, and at the same time drives the positioning needle body 6 to slide in the sealing sleeve 5, thereby driving the positioning needle body 6 to be inserted into the mold body 1. At the same time, the guide rod 23 slides in the guide cylinder 26, and the electric push rod 37 continues to push the driving plate 38 to move. The driving plate 38 continues to push the threaded cylinder 15 and the needle sleeve 7 to move. The driving ring 22 on the needle sleeve 7 contacts the upper end of the movable sleeve 28 and drives the movable sleeve 28 to move. The movable sleeve 28 drives the movable ring 29 to move in the limiting groove 4 through the compression spring 30 until the movable ring 29 contacts the upper end of the movable groove 2, thereby limiting the movable ring 29 and also limiting the positioning needle body 6, thereby guiding and limiting the positioning needle body 6, so that it can be accurately and stably inserted into the mold body 1.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A floating positioning needle assembly for floating injection molding, comprising: A positioning needle body (6) is mounted on the outside of the mold body (1), characterized in that: the upper end of the positioning needle body (6) is connected to a needle sleeve (7) through a fixing component, a piston cylinder (8) is fixedly mounted on the outer side of the lower end of the needle sleeve (7), and a movable sleeve (28) is connected through the piston cylinder (8), a movable ring (29) is fixedly mounted on the outer wall of the lower end of the movable sleeve (28), and a plurality of springs (30) are evenly fixedly mounted on the lower end of the movable ring (29), a sliding sleeve (21) is mounted on the outer end of the needle sleeve (7) through a connecting component, two guide rods (23) are symmetrically fixedly mounted on the outer end of the sliding sleeve (21), the outer end of the movable sleeve (28) is sleeved with a fixing plate (25), two guide cylinders (26) are symmetrically fixedly mounted on the upper end of the fixing plate (25), and the lower end of the guide rod (23) can be slidably inserted into the guide cylinder (26); The outer end of the mold body (1) is provided with a limiting groove (4), the bottom end of the limiting groove (4) is provided with a moving groove (2), the bottom end of the moving groove (2) is provided with a through hole (3), the through hole (3) is communicated with the inner end of the mold body (1), a sealing sleeve (5) is fixedly installed in the through hole (3), the moving ring (29) is fixed in the limiting groove (4) through the fixing plate (25), and the lower end of the spring (30) contacts the inner wall of the bottom end of the moving groove (2), the positioning needle body (6) passes through the sealing sleeve (5), and the upper end of the fixing plate (25) is provided with a driving component; The driving component includes a connecting plate (31), an electric push rod (37) and a fixing nut (40). Connecting blocks (33) are fixedly installed at both left and right ends of the connecting plate (31). The connecting blocks (33) are semicircular and can be fixed to the upper end of the fixing plate (25) by fixing bolts (27). A driving plate (38) is provided at the upper end of the connecting plate (31). Ear plates (35) are fixedly installed on four sides of the lower end of the driving plate (38). Slide rails (32) are fixedly installed on four sides of the upper end of the connecting plate (31). Each of the slide rails (32) is slidably connected to a rotating rod (34) through a slider. The end of the rotating rod (34) away from the slide rail (32) is rotatably connected to the ear plate (35) through an axle pin. The rotating rods (34) on the left and right sides of the upper end of the connecting plate (31) are cross-arranged.

2. The floating positioning needle assembly for floating injection molding according to claim 1, characterized in that: The fixing component includes a positioning groove (9), a fixing rod (12), a connecting rod (13) and a hexagonal groove (17). The positioning groove (9) and the fixing rod (12) are respectively provided in a plurality and are evenly opened at the lower end of the needle sleeve (7). The fixing rod (12) is evenly fixed on the outer wall of one end of the positioning needle body (6). When the positioning needle body (6) is inserted into the needle sleeve (7), the fixing rod (12) can be located in the positioning groove (9).

3. The floating positioning needle assembly for floating injection molding according to claim 2, characterized in that: The hexagonal groove (17) is opened at the upper end of the needle sleeve (7), and a large nut (18) is placed in the hexagonal groove (17). The large nut (18) is connected to the threaded cylinder (15) through the internal thread. The upper end of the threaded cylinder (15) is fixedly installed with a driving block (16), and a connecting rod 2 (19) is fixedly installed in the driving block (16). The outer end of the driving block (16) is sleeved with a rubber sleeve (20). The connecting rod 1 (13) is fixedly installed on the upper end of the positioning needle body (6), and the connecting rod 1 (13) and the connecting rod 2 (19) bracket are tied with a connecting rope (14).

4. The floating positioning needle assembly for floating injection molding according to claim 1, characterized in that: The connecting component comprises a limiting ring (10), a driving ring (22) and a fastening nut (24); the limiting ring (10) is fixedly sleeved on the outer wall of the needle sleeve (7); a thread groove (11) is provided on the outer wall of the upper end of the needle sleeve (7); the driving ring (22) is fixedly mounted on the lower end of the sliding sleeve (21); the fastening nut (24) is threadedly connected to the outer end of the needle sleeve (7) through the thread groove (11); when the lower end of the fastening nut (24) contacts the upper end of the sliding sleeve (21), the lower end of the sliding sleeve (21) contacts the upper end of the limiting ring (10).

5. The floating positioning needle assembly for floating injection molding according to claim 1, characterized in that: The fixed plate (25) is annular and fixed to the outer wall of the mold body (1) by means of fixing bolts (27). The fixed plate (25) is located outside the outer end of the limiting groove (4). The diameter of the limiting groove (4) is larger than the diameter of the movable groove (2). The diameter of the movable groove (2) is larger than the diameter of the through hole (3). The outer wall of the movable ring (29) and the inner wall of the limiting groove (4) are slidably connected. The outer diameter of the movable ring (29) is larger than the inner diameter of the fixed plate (25). When the spring (30) is in a balanced state, the upper end of the movable ring (29) contacts the lower end of the fixed plate (25).

6. The floating positioning needle assembly for floating injection molding according to claim 1, characterized in that: A transverse plate (36) is fixedly installed between the two rotating rods (34), the upper end of the transverse plate (36) is rotatably connected to one end of an electric push rod (37) through a rotating block, and the other end of the electric push rod (37) is rotatably connected to the lower end of a driving plate (38) through a rotating block.

7. The floating positioning needle assembly for floating injection molding according to claim 6, characterized in that: The upper end of the driving plate (38) is provided with fixing holes (39) on both sides. The diameter of the fixing hole (39) is larger than the diameter of the threaded barrel (15) and smaller than the outer diameter of the large nut (18). The driving plate (38) is sleeved on the outer end of the threaded barrel (15) through the fixing hole (39). The fixing nut (40) is threadedly connected to the outer wall of the threaded barrel (15) and contacts the upper end of the driving plate (38).

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