Efficient forming mold for milk powder can cover

Abstract

The utility model provides an efficient forming die for a milk powder can cover, and belongs to the technical field of milk powder container manufacturing. The efficient forming mold for the milk powder can cover comprises an upper mold plate, a lower mold plate, a mold core, a vertical plate and a bottom plate, a mold cavity is formed in the upper mold plate, a plurality of mounting cavities are formed in the mold core, inclined sliding core rods are arranged in the mounting cavities, the top ends of the core rods penetrate out of the mounting cavities and are inserted into the mold cavity, and telescopic holes are formed in the tail ends of the core rods in the length direction; an obliquely-arranged guide rod is fixed to the wall of the mounting cavity and inserted into the telescopic hole, the core rod is provided with a blocking edge, the guide rod is sleeved with a first spring, the upper end of the first spring abuts against the blocking edge, the lower end of the first spring abuts against the wall of the mounting cavity, a vertically-sliding ejector rod is arranged in the mounting cavity, and the lower end of the ejector rod penetrates out of the mold core and the lower mold plate. The two steps of oblique core pulling and product ejection can be achieved through one ejector rod, the structure is simple and stable, and smooth and stable demolding is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of milk powder container manufacturing and relates to a high-efficiency forming die for a milk powder can cover. Background Art

[0002] A milk powder can is a sealed container used for long-term storage of milk powder. It consists of a can body and a lid. The cylindrical can body and lid are connected by threads or snaps. The snap-on lid has a snap groove on its inside, and a protruding snap block on the top edge of the can body. When the lid is pressed onto the can body, the snap block snaps into the snap groove, achieving a snap connection. Because both the can body and lid are injection-molded from plastic, the snap groove on the inside of the lid is difficult to demold, requiring an oblique core-pulling mechanism to eject the lid from the mold cavity using a push rod. Utility Model Content

[0003] The purpose of the utility model is to address the above-mentioned problems in the existing technology and propose an efficient forming mold for milk powder can lids. Through a ejector rod, two steps of oblique core pulling and product ejection can be achieved, and the structure is simple and stable.

[0004] The purpose of the utility model can be achieved through the following technical solutions: an efficient forming mold for a milk powder can lid, comprising an upper template, a lower template, a mold core, a vertical plate and a bottom plate, characterized in that the upper template is provided with a mold cavity, the lower template is provided with a mounting groove for the mold core to be embedded and is fixed by bolts, the two vertical plates are respectively fixed to the lower end of the lower template, the bottom plate is fixed to the lower end of the vertical plate, a plurality of mounting cavities are provided in the mold core, a core rod is provided in the mounting cavity that slides obliquely, the top end of the core rod passes through the mounting cavity and is inserted into the mold cavity, a telescopic hole is provided at the tail end of the core rod along the length direction, an obliquely arranged guide rod is fixed on the wall of the mounting cavity, the guide rod is inserted into the telescopic hole, the core rod is provided with a stop edge, a first spring is sleeved on the guide rod, the upper end of the first spring is in contact with the stop edge, and the lower end of the first spring is in contact with the stop edge. The mounting cavity wall is abutted against each other, and a vertically sliding ejector rod is provided in the mounting cavity. The lower end of the ejector rod passes through the mold core and the lower template. A driving gear, a driven gear and a driving gear are also rotated in the mounting cavity. The driving gear and the driven gear are fixed on the same synchronous shaft, and the driving gear is meshed with the driven gear. The side surface of the ejector rod has a section of an active spur rack meshed with the driving gear, and the side surface of the core rod has a section of a driving spur rack meshed with the driving gear. A ejector groove for embedding the ejector plate is opened at the upper end of the mold core, and a movable rod is provided at the lower end of the ejector plate, and the lower end of the movable rod extends into the mounting cavity. A support block is fixed to the lower end of the movable rod, and a second spring is sleeved on the movable rod. The upper end of the second spring abuts against the top wall of the mounting cavity, and the lower end of the second spring abuts against the support block, and the support block is located directly above the ejector rod.

[0005] Furthermore, a synchronization plate is provided in the space between the two vertical plates, and the lower ends of multiple ejector rods are fixed on the synchronization plate. A clearance hole is opened on the bottom plate for the piston rod of the unloading cylinder to pass through. The synchronization plate is located above the clearance hole, and a third spring is sleeved on the lower end of the ejector rod. The lower end of the third spring rests on the synchronization plate, and the upper end of the third spring rests on the lower end surface of the lower template.

[0006] Furthermore, a limiting block is fixed in the installation cavity, a limiting hole is opened on the limiting block, and the upper end of the core rod is passed through the limiting hole.

[0007] Furthermore, the core rod, guide rod and ejector rod are all square rods.

[0008] Furthermore, when the ejector rod moves downward to the lowest end, the active spur rack is separated from the active gear.

[0009] Furthermore, the upper end of the core rod has a cylindrical section, and the top end of the cylindrical section has a hemisphere.

[0010] Furthermore, an oblique hole communicating with the mounting cavity is opened on the core mold, the cylinder passes through the oblique hole, and a step is provided in the oblique hole, and the upper end of the core rod rests on the step.

[0011] Furthermore, an injection tube communicating with the mold cavity is provided on the upper mold plate.

[0012] Under the action of the first spring, the core rod always rests on the step, and the hemisphere is embedded in the buckle groove of the milk powder can cover. Under the action of the second spring, the ejector plate is always embedded in the ejector groove. Under the action of the third spring, the ejector rod is always at the lowest end.

[0013] After the injection molding machine drives the upper template and the lower template to close the mold, the mold cavity is filled with plastic raw materials through the injection tube. After cooling and shaping, the mold is opened, the upper template moves up, and then the unloading cylinder is started to push the synchronous plate up. The synchronous plate drives the ejector rod to move up, and the active spur rack on the ejector rod contacts and engages with the active gear. At this time, there is still a distance between the upper end of the ejector rod and the support block. The active gear drives the driven gear and the driving gear to rotate. The driving gear drives the core rod to move obliquely downward through the driving rack, so that the hemisphere and cylinder exit the mold cavity and enter the installation cavity. At this time, the milk powder can lid can be pushed upward away from the mold core, and the ejector rod continues to move up until it abuts against the support block. The second spring is compressed, and the movable rod and the ejector plate move up to push the milk powder can lid away from the mold core, so that workers can easily take the parts. The piston rod of the unloading cylinder moves downward, and under the action of the third spring, the ejector rod moves down to its original position. During the downward movement, several gears reverse, pushing the core rod to move obliquely upward. Finally, the second spring pushes the core rod against the step, and the cylinder and hemisphere return to the mold cavity to wait for the next injection molding.

[0014] Compared with the existing technology, the efficient forming mold of the milk powder can lid has the following advantages:

[0015] 1. This injection molding mold allows the milk powder can lid to be demoulded in two steps. The first step is to pull out the core rod obliquely, and the second step is to push the mold core upward by the ejector plate. The two steps are coordinated in sequence and are both completed by the ejector rod. The structure is simple and stable, ensuring smooth and stable demoulding.

[0016] 2. Only one unloading cylinder can complete a series of actions, and the core rod can be pulled out while the ejector rod is rising, saving time. Moreover, they are all located in the installation cavity and do not take up additional space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the high-efficiency forming die for the milk powder can lid.

[0018] Figure 2 It is a schematic diagram of the internal structure of the installation cavity.

[0019] In the figure, 1. upper template; 2. lower template; 3. mold core; 4. vertical plate; 5. bottom plate; 6. mold cavity; 7. mounting cavity; 8. core rod; 9. telescopic hole; 10. guide rod; 11. retaining edge; 12. first spring; 13. ejector rod; 14. driving gear; 15. driven gear; 16. driving gear; 17. synchronous shaft; 18. driving spur rack; 19. driving spur rack; 20. ejector plate; 21. movable rod; 22. support block; 23. second spring; 24. synchronous plate; 25. clearance hole; 26. third spring; 27. limit block; 28. cylinder; 29. ​​hemisphere; 30. step; 31. injection tube. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] like Figure 1 As shown, the efficient forming mold of the milk powder can lid includes an upper template 1, a lower template 2, a mold core 3, a vertical plate 4 and a bottom plate 5. The upper template 1 is provided with a mold cavity 6, and an injection tube 31 connected to the mold cavity 6 is passed through the upper template 1. The lower template 2 is provided with a mounting groove for the mold core 3 to be embedded and is fixed by bolts. The two vertical plates 4 are respectively fixed to the lower end of the lower template 2, and the bottom plate 5 is fixed to the lower end of the vertical plate 4. Several mounting cavities 7 are provided in the mold core 3. The mounting cavity 7 is provided with an inclined sliding core rod 8. The top end of the core rod 8 passes through the mounting cavity 7 and is inserted into the mold cavity 6. The tail end of the core rod 8 is provided with a telescopic hole 9 along the length direction. An inclined guide rod 10 is fixed on the wall of the mounting cavity 7. The guide rod 10 is inserted into the telescopic hole 9. The core rod 8 has a stop edge 11. A first spring 12 is sleeved on the guide rod 10. The upper end of the first spring 12 is in contact with the stop edge 11, and the lower end of the first spring 12 is in contact with the wall of the mounting cavity 7. A vertically sliding ejection rod 13 is provided in the mounting cavity 7, and the lower end of the ejection rod 13 passes through the mold core 3 and the lower template 2.

[0022] like Figure 2 As shown, a driving gear 14, a driven gear 15 and a driving gear 16 are also rotatably provided in the installation cavity 7. The driving gear 14 and the driven gear 15 are fixed on the same synchronous shaft 17. The driving gear 16 is meshed with the driven gear 15. The side of the ejector rod 13 has a section of a driving straight rack 18 meshing with the driving gear 14, and the side of the core rod 8 has a section of a driving straight rack 19 meshing with the driving gear 16. The upper end of the mold core 3 is provided with a ejector groove for embedding the ejector plate 20. The lower end of the ejector plate 20 is provided with a movable rod 21. The lower end of the movable rod 21 is extended into the installation cavity 7. A support block 22 is fixed to the lower end of the movable rod 21. A second spring 23 is sleeved on the movable rod 21. The upper end of the second spring 23 rests on the top wall of the installation cavity 7, and the lower end of the second spring 23 rests on the support block 22. The support block 22 is located directly above the ejector rod 13.

[0023] A synchronization plate 24 is provided in the space between the two vertical plates 4. The lower ends of multiple ejector rods 13 are fixed on the synchronization plate 24. A clearance hole 25 is opened on the bottom plate 5 for the piston rod of the unloading cylinder to pass through. The synchronization plate 24 is located above the clearance hole 25. The lower end of the ejector rod 13 is sleeved with a third spring 26. The lower end of the third spring 26 rests on the synchronization plate 24, and the upper end of the third spring 26 rests on the lower end surface of the lower template 2.

[0024] A limiting block 27 is fixed in the mounting cavity 7 , a limiting hole is formed on the limiting block 27 , and the upper end of the core rod 8 is passed through the limiting hole.

[0025] The core rod 8, guide rod 10 and ejector rod 13 are all square rods. When the ejector rod 13 moves down to the lowest end, the active spur rack 18 is separated from the active gear 14. The upper end of the core rod 8 has a cylindrical body 28, and the top of the cylindrical body 28 has a hemisphere 29. An inclined hole communicating with the mounting cavity 7 is opened on the core mold, and the cylindrical body 28 passes through the inclined hole. There is a step 30 in the inclined hole, and the upper end of the core rod 8 rests on the step 30.

[0026] Under the action of the first spring 12, the core rod 8 always rests on the step 30, and the hemispherical body 29 is embedded in the buckle groove of the milk powder can lid. Under the action of the second spring 23, the ejector plate 20 is always embedded in the ejector groove. Under the action of the third spring 26, the ejector rod 13 is always at the lowest end.

[0027] The upper mold plate 1 moves upwards, and the ejector plate 24 moves upwards, and the active spur rack 18 on the ejector rod 13 contacts and meshes with the active gear 14. At this time, there is still a distance between the upper end of the ejector rod 13 and the support block 22, and the active gear 14 drives the driven gear 15 and the driving gear 16 to rotate. The driving gear 16 drives the core rod 8 to move obliquely downward through the driving rack, so that the hemispherical body 29 and the cylinder 28 exit the mold cavity 6 and enter the installation cavity 7. At this time, the milk powder can lid can be pushed upwards away from the mold core 3, and the ejector rod 13 continues to move upwards until it abuts against the support block 22. The second spring 23 is compressed, and the movable rod 21 and the ejector plate 20 move upwards, pushing the milk powder can lid away from the mold core 3, and the worker can easily take the part. The piston rod of the unloading cylinder moves downward, and under the action of the third spring 26, the ejector rod 13 moves down to its original position. During the downward movement, several gears are reversed, pushing the core rod 8 to move obliquely upward. Finally, the core rod 8 is pressed against the step 30 by the second spring 23, and the cylinder 28 and the hemisphere 29 return to the mold cavity 6 to wait for the next injection molding.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. An efficient forming mold for a milk powder can lid, comprising an upper mold plate, a lower mold plate, a mold core, a vertical plate and a bottom plate, characterized in that: The upper template is provided with a mold cavity, the lower template is provided with a mounting groove for the mold core to be embedded and is fixed by bolts, the two vertical plates are respectively fixed to the lower end of the lower template, the bottom plate is fixed to the lower end of the vertical plate, a number of mounting cavities are provided in the mold core, a core rod with an inclined sliding is provided in the mounting cavity, the top end of the core rod passes through the mounting cavity and is inserted into the mold cavity, a telescopic hole is provided at the tail end of the core rod along the length direction, an inclined guide rod is fixed on the wall of the mounting cavity, the guide rod is inserted into the telescopic hole, the core rod has a stop edge, a first spring is sleeved on the guide rod, the upper end of the first spring is in contact with the stop edge, the lower end of the first spring is in contact with the wall of the mounting cavity, a vertically sliding ejecting rod is provided in the mounting cavity, the lower end of the ejecting rod passes through The mold core and the lower mold plate also rotate in the installation cavity, and a driving gear, a driven gear and a driving gear are also rotated. The driving gear and the driven gear are fixed on the same synchronous shaft, and the driving gear is meshed with the driven gear. The side of the ejector rod has a section of an active spur rack meshing with the driving gear, and the side of the core rod has a section of a driving spur rack meshing with the driving gear. The upper end of the mold core is provided with a ejector groove for embedding the ejector plate, and the lower end of the ejector plate is provided with a movable rod, and the lower end of the movable rod extends into the installation cavity. A support block is fixed to the lower end of the movable rod, and a second spring is sleeved on the movable rod. The upper end of the second spring rests on the top wall of the installation cavity, and the lower end of the second spring rests on the support block, and the support block is located directly above the ejector rod.

2. The efficient forming die for a milk powder can lid according to claim 1, characterized in that: A synchronous plate is provided in the space between the two vertical plates, and the lower ends of multiple ejector rods are fixed on the synchronous plate. A clearance hole is opened on the bottom plate for the piston rod of the unloading cylinder to pass through. The synchronous plate is located above the clearance hole, and a third spring is sleeved on the lower end of the ejector rod. The lower end of the third spring rests on the synchronous plate, and the upper end of the third spring rests on the lower end surface of the lower template.

3. The efficient forming die for a milk powder can lid according to claim 2, characterized in that: A limiting block is fixed in the installation cavity, a limiting hole is opened on the limiting block, and the upper end of the core rod is passed through the limiting hole.

4. The efficient forming die for a milk powder can lid according to claim 1, characterized in that: The core rod, guide rod and ejector rod are all square rods.

5. The efficient forming die for a milk powder can lid according to claim 4, characterized in that: When the ejector rod moves down to the lowest end, the active spur rack is separated from the active gear.

6. The efficient forming die for a milk powder can lid according to claim 5, characterized in that: The upper end of the core rod is provided with a cylindrical section, and the top end of the cylindrical section is provided with a hemisphere.

7. The efficient forming die for a milk powder can lid according to claim 6, characterized in that: An oblique hole communicating with the mounting cavity is opened on the core mold, and the cylinder passes through the oblique hole. A step is provided in the oblique hole, and the upper end of the core rod rests on the step.

8. The efficient forming die for a milk powder can lid according to claim 1, characterized in that: An injection tube communicating with the mold cavity is passed through the upper mold plate.

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