A rotational mould

Abstract

The application relates to the technical field of roto-molding equipment, in particular to a roto-molding mold which comprises a lower mold shell and an upper mold shell arranged on the opening of the lower mold shell, further comprises a plurality of limiting blocks, the limiting blocks are in sliding connection with the side wall of the upper mold shell, a plurality of limiting grooves are arranged on the side wall of the lower mold shell, the limiting grooves are in one-to-one correspondence with the limiting blocks, and the limiting blocks can be clamped in the limiting grooves; a rotating disc is in rotary connection with the side wall of the upper mold shell; a pushing frame is in rotary connection with the edge position of the rotating disc, and the end of the pushing frame can push the limiting blocks to slide; a ratchet wheel is in rotary connection with the side wall of the rotating disc, the end of the pushing frame is in abutment with the outer wall of the ratchet wheel; a driving piece is arranged on the upper mold for driving the rotating disc to rotate; and a positioning piece is used for limiting the relative rotation between the rotating disc and the ratchet wheel. The application has the effects of improving the convenience of the mold closing of the upper mold shell and the lower mold shell and reducing the consumption of manpower.

Description

Technical Field

[0001] This application relates to the field of rotational molding equipment technology, and in particular to a rotational molding mold. Background Technology

[0002] Rotational molding, also known as rotational molding, is a method of hollow plastic molding. The process involves first adding plastic raw material into a mold, then continuously rotating and heating the mold along two perpendicular axes. Under the influence of gravity and heat, the plastic raw material gradually and evenly coats, melts, and adheres to the entire surface of the mold cavity, forming the desired shape. The final product is then cooled and solidified.

[0003] The existing rotational molding machine mold includes a lower mold shell and an upper mold shell. Several locking buckles are evenly arranged between the upper mold shell and the lower mold shell. The locking buckles are opened, the raw material is loaded into the mold, and then several locking buckles are manually locked. Under the traction and restriction of the locking buckles, the upper mold shell is fixed on the lower mold shell. Finally, the mold is sent into the oven for heating and rotational molding.

[0004] Open the latches, remove the upper mold shell, add the raw material into the lower mold shell, close the upper mold shell, and manually lock several latches. The above mold requires manual opening or closing of several latches during the process of loading raw materials, which consumes manpower and needs improvement. Summary of the Invention

[0005] To make the mold closing between the upper and lower mold shells more convenient and reduce the manpower consumption during the mold closing process, this application provides a rotational molding mold.

[0006] This application provides a rotational molding die, which adopts the following technical solution:

[0007] A rotational molding die includes a lower mold shell and an upper mold shell covering the opening of the lower mold shell, and further includes...

[0008] The limiting block is provided in a plurality of such limiting blocks. The limiting blocks are slidably connected to the side wall of the upper mold shell. The side wall of the lower mold shell is provided with a plurality of limiting grooves. The limiting grooves are provided in a one-to-one correspondence with the limiting blocks. The limiting blocks can be engaged in the limiting grooves.

[0009] A rotating disk, which is rotatably connected to the side wall of the upper mold shell;

[0010] A toggle frame is rotatably connected to the edge of the rotating disk, and the end of the toggle frame can move the limiting block.

[0011] A ratchet, which is rotatably connected to the side wall of the rotating disk, and the end of the actuating bracket abuts against the outer wall of the ratchet;

[0012] A driving component, which is disposed on the upper mold and is used to drive the rotating disk to rotate;

[0013] A positioning element, the positioning element being used to limit the relative rotation between the rotating disk and the ratchet.

[0014] By adopting the above technical solution, workers open the mold, load raw materials into it, then place the upper mold shell on top of the lower mold shell. Activating the drive mechanism causes the rotating disk to rotate, which in turn rotates the actuating frame. The end of the actuating frame abuts against the side wall of the limiting block, causing the limiting block to slide into the limiting groove. Under the limiting action of the limiting block, the upper mold shell is fixed to the lower mold shell. Only by driving the rotating disk to rotate and inserting several limiting blocks into the limiting grooves is the connection between the upper and lower mold shells completed, making the connection more convenient and reducing manpower consumption.

[0015] Optionally, the limiting block is hollow, and a positioning post is slidably connected to the inner wall of the limiting block. An elastic element is provided on the inner wall of the limiting block so that the end of the positioning post abuts against the inner wall of the limiting groove.

[0016] By adopting the above technical solution, during the process of the actuating frame driving the limiting block to slide into the limiting groove, the positioning pin slides into the inner cavity of the limiting block, and the elastic element is compressed. When the limiting block slides into the limiting groove, under the action of the elastic element's own rebound force, the positioning pin slides into the inner wall of the limiting groove, and the end of the positioning pin abuts against the inner wall of the limiting groove, thereby making the locking and fixing of the limiting block and the limiting groove more stable.

[0017] Optionally, a traction groove is provided on the side wall of the limiting block, a sliding piece slides on the inner wall of the traction groove, a pressing block is provided at the end of the actuating frame, the pressing block can abut against the side wall of the sliding piece, the pressing block is fixedly connected to the actuating frame, and the end of the actuating frame can abut against the side wall of the sliding piece.

[0018] By adopting the above technical solution, during the mold opening process, the driving component drives the rotating disk to rotate, the rotating disk drives the actuating frame to rotate, the actuating frame drives the pressing block to move, the pressing block inserts into the traction groove and abuts against the side wall of the sliding piece, the sliding piece applies force to the elastic component, and drives the positioning pin to slide into the inner cavity of the limiting block. Under the drive of the actuating frame, the limiting block is pulled out from the limiting groove, which facilitates the mold opening. At this time, the ratchet plays a limiting support role for the actuating frame, making the actuating frame's pull on the limiting block more stable.

[0019] Optionally, the lower mold shell is provided with a plurality of positioning holes, the positioning holes are located in the limiting groove, the opening edge of the positioning hole is rounded, and the positioning post is inserted into the positioning hole.

[0020] By adopting the above technical solution, after the limiting block is inserted and fixed in the limiting groove, the positioning post is popped out, and the end of the positioning post is inserted into the positioning hole. Under the limitation of the positioning post and the positioning hole, the possibility of the limiting block detaching from the limiting groove by itself is reduced. The opening edge of the positioning hole is rounded, which guides the insertion of the positioning post and makes it easier for the positioning post to be inserted into the positioning hole.

[0021] Optionally, a guide groove is provided on the side wall of the lower mold, and the guide groove communicates with the limiting groove.

[0022] By adopting the above technical solution, during the process of the limiting block sliding into the limiting groove, the guide groove guides the sliding of the positioning column, so that the positioning column first slides into the inner cavity of the limiting block, and then when the limiting block slides into the limiting groove, the positioning column slides away from the inner cavity of the limiting block.

[0023] Optionally, the ratchet has several slots on its side wall, and the positioning element is a pawl with a spring, the end of which is located in the slot.

[0024] By adopting the above technical solution, when the actuating frame slides towards the limiting block in the limiting groove, the end of the pawl abuts in the slot, and the ratchet engages and positions the actuating frame, thus avoiding the possibility of rotation during the sliding process of the actuating frame driving the limiting block.

[0025] Optionally, a positioning block is fixed on the side wall of the lower mold shell, and a positioning groove is formed on the side wall of the positioning block. A sliding block is fixed on the side wall of the upper mold shell, and the sliding block is inserted into the positioning groove.

[0026] By adopting the above technical solution, during the mold closing process, the upper mold shell is moved from the position near the sliding block to the position of the positioning groove, and the sliding block is inserted into the positioning groove. The cooperation between the sliding block and the positioning groove facilitates the positioning of the upper and lower mold shells, making the mold closing more accurate.

[0027] Optionally, a mounting bracket is fixed on the outer wall of the upper mold shell, and several hanging rings are fixed on the side wall of the mounting bracket.

[0028] By adopting the above technical solution, the mounting bracket supports the upper mold shell, and the hook ring facilitates fixing the mold to an external device that drives the mold to rotate. The mounting bracket and hook ring facilitate the fixing of the mold.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. Open the mold, load the raw material into the mold, place the upper mold shell over the opening of the lower mold shell, start the drive unit, the drive unit drives the rotating disk to rotate, the positioning component restricts the rotation of the ratchet, the end of the actuating frame abuts against the groove of the ratchet, the ratchet limits the position of the actuating frame, the rotating disk and the ratchet drive the actuating frame to move, the actuating frame pushes several limit blocks into the limit groove. Since the limit blocks are slidably connected to the upper mold shell and the limit groove is located on the lower mold shell, the upper mold shell and the lower mold shell are fixed. It is not necessary for the staff to manually operate the locking components on the mold one by one, thereby improving the mold closing speed and reducing the consumption of manpower.

[0031] 2. Along the direction from the upper mold shell to the lower mold shell, as the driving component drives the rotating disk to rotate counterclockwise, the rotating disk and ratchet rotate synchronously under the limiting effect of the positioning component. At this time, the end of the actuating frame abuts against the inner wall of the groove on the outer wall of the ratchet. The ratchet restricts the rotation of the actuating frame. Under the actuation of the actuating frame, the limiting block is pushed into the limiting groove, fixing the upper mold shell on the lower mold shell. When the driving component drives the rotating disk to rotate counterclockwise, the ratchet and the rotating disk can rotate relative to each other. The rotating disk drives the actuating frame to move, the pressing block is inserted into the traction groove, and the pressing block drives the sliding piece to slide. Under the action of the elastic component, the positioning pin slides into the inner cavity of the limiting block. Under the traction of the actuating frame, the limiting block slides out of the limiting groove. Then, under the support of the ratchet, the actuating frame slides away from the limiting block, thus facilitating the mold opening. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the mold in the embodiments of this application.

[0033] Figure 2 This is a top view of the mold in the embodiments of this application, used to show the structure inside the upper cavity of the upper mold shell.

[0034] Figure 3 This is an exploded view of the ratchet and rotating disk in an embodiment of this application.

[0035] Figure 4 This is a cross-sectional view of the limiting block portion in an embodiment of this application, used to show the internal structure of the limiting block.

[0036] Reference numerals in the attached drawings: 1. Lower mold shell; 2. Upper mold shell; 3. Limiting block; 4. Limiting groove; 5. Rotating disk; 6. Actuating frame; 7. Ratchet; 8. Driving component; 9. Positioning component; 10. Positioning pin; 11. Elastic component; 12. Traction groove; 13. Sliding piece; 14. Pressing block; 17. Slot; 19. Positioning block; 20. Positioning groove; 21. Sliding block; 22. Mounting bracket; 23. Hanging ring. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0038] This application discloses a rotational molding die.

[0039] Reference Figure 1 A rotational molding die includes a lower mold shell 1 and an upper mold shell 2. The upper mold shell 2 covers the opening of the lower mold shell 1. A positioning block 19 is fixed to the outer wall of the lower mold shell 1 by bolts. A positioning groove 20 is formed on the side wall of the positioning block 19. A sliding block 21 is fixed to the side wall of the upper mold shell 2 by bolts. During the mold closing process, the operator moves the sliding block 21 to a position close to the positioning block 19 and inserts the sliding block 21 into the positioning groove 20, which facilitates the positioning of the upper mold shell 2 and the lower mold shell 1 and reduces the possibility of mold closing deviation.

[0040] Reference Figure 1 A mounting bracket 22 is fixed to the top wall of the upper mold shell 2 by bolts. A hanging ring 23 is welded and fixed to the outer wall of the mounting bracket 22. The hanging ring 23 facilitates the connection of the mold to the external equipment that drives the mold to rotate. The mounting bracket 22 supports the mold, thereby making the connection between the mold and the external equipment more stable.

[0041] Reference Figure 2 and Figure 3 The upper mold shell 2 is hollow. A rotating disk 5 is rotatably connected to the inner wall of the upper mold shell 2 via a rotating shaft. A ratchet 7 is rotatably connected to the side wall of the rotating disk 5. A positioning element 9 is provided on the side wall of the rotating disk 5 to make the rotating disk 5 and the ratchet 7 rotate synchronously. Several slots 17 are evenly spaced on the side wall of the ratchet 7. The slots 17 are all located on the side of the ratchet 7 facing the rotating disk 5. In this application, the positioning element 9 is a pawl with a torsion spring. The positioning element 9 is hinged to the side wall of the rotating disk 5. When it is necessary to make the rotating disk 5 and the ratchet 7 rotate synchronously, the end of the positioning element 9 abuts into the slot 17. Under the limitation of the positioning element 9, the end of the positioning element 9 abuts against the inner wall of the slot 17.

[0042] Reference Figure 2 A toggle frame 6 is hinged to the edge of the rotating disk 5 via a pivot. The toggle frame 6 has a torsion spring, causing its end to abut against the outer wall of the ratchet 7. When the rotating disk 5 and the ratchet 7 rotate synchronously, the end of the toggle frame 6 abuts against the outer wall of the ratchet 7, and the ratchet 7 limits the position of the toggle frame 6, thereby reducing the possibility of the toggle frame 6 rotating on its own. When the rotating disk 5 and the ratchet 7 rotate asynchronously, the end of the toggle frame 6 slides on the outer wall of the ratchet 7, and the ratchet 7 provides support for the toggle frame 6.

[0043] Reference Figure 2Several limiting blocks 3 are slidably connected on the inner wall of the upper mold shell 2, and the limiting blocks 3 are all located at the edge of the upper mold shell 2; several limiting grooves 4 are evenly spaced on the side wall of the lower mold shell 1, and the limiting grooves 4 and the limiting blocks 3 are set in a one-to-one correspondence. When the upper mold shell 2 and the lower mold shell 1 need to be connected together, the several limiting blocks 3 are driven to slide into the corresponding limiting grooves 4, and the connection between the upper mold shell 2 and the lower mold shell 1 is realized under the restriction of the limiting blocks 3.

[0044] Reference Figure 2 and Figure 4 The limiting block 3 is hollow, with one side connected to the outside. A positioning post 10 is slidably connected to the inner wall of the limiting block 3. An elastic element 11 is provided on the inner wall of the limiting block 3 to allow the positioning post 10 to return to its original position after sliding. In this application, the elastic element 11 is preferably a spring sheet. Several guide grooves are provided on the side wall of the lower mold shell 1. The guide grooves are arranged in a one-to-one correspondence with the limiting grooves 4. The guide grooves are connected to the corresponding limiting grooves 4. During the process of the limiting block 3 sliding into the limiting groove 4, the guide grooves guide the sliding of the positioning post 10, thereby making the sliding of the positioning post 10 and the limiting block 3 more convenient.

[0045] Reference Figure 2 and Figure 4 The inner wall of the limiting groove 4 is provided with a positioning hole. The opening edge of the positioning hole is rounded. During the process of the limiting block 3 sliding into the limiting groove 4, the positioning post 10 slides into the inner cavity of the limiting block 3 under the restriction of the guide groove. The elastic element 11 is compressed. When the limiting block 3 and the positioning post 10 slide into the limiting groove 4, the end of the positioning post 10 is inserted into the positioning hole under the action of the elastic element 11's own rebound force, so that the engagement between the limiting block 3 and the inner wall of the limiting groove 4 is more stable.

[0046] Reference Figure 4 A traction groove 12 is provided on the side wall of the limiting block 3. The traction groove 12 is connected to the inner cavity of the limiting block 3. A sliding piece 13 is slidably connected to the inner wall of the traction groove 12. One end of the elastic element 11 is fixedly connected to the positioning post 10, and the other end is fixedly connected to the side wall of the sliding piece 13. During the process of the sliding piece 13 sliding into the inner cavity of the guide groove, it drives the elastic element 11 to slide into the inner cavity of the limiting block 3, which in turn drives the positioning post 10 to slide. After the sliding piece 13 is released, the positioning post 10 slides under the action of the elastic force of the elastic element 11 itself.

[0047] Reference Figure 2 and Figure 4A spring-loaded pressing block 14 is hinged to the side wall of the actuating frame 6. During the rotation of the rotating disk 5, the pawl and ratchet 7 slide, causing the rotating disk 5 to move the actuating frame 6 to the position of the limiting block 3. The pressing block 14 is then inserted into the traction groove 12, driving the sliding piece 13 to slide, causing the positioning pin 10 to retract and continuing to drive the actuating frame 6 to move, pulling the limiting block 3 out of the limiting groove 4, thus separating the upper mold shell 2 from the lower mold shell 1. During the sliding process of the limiting block 3 driven by the actuating frame 6, when the actuating frame 6 slides past the limiting block 3, the spring on the pressing block 14 is compressed, causing the pressing block 14 to rotate. This reduces the contact between the pressing block 14 and the side wall of the limiting block 3, affecting the driving of the limiting block 3.

[0048] Reference Figure 1 and Figure 2 The outer wall of the upper mold shell 2 is provided with a driving component 8 for driving the rotating disk 5 to rotate. In this application, the driving component 8 is preferably a drive motor. The rotating shaft of the driving component 8 is coaxially and detachably connected to the rotating shaft of the rotating disk 5. When the driving component 8 is started, the rotating shaft of the driving component 8 rotates, thereby driving the rotating disk 5 to rotate. A mounting shell for fixing the driving component 8 is fixed on the top wall of the upper mold shell 2. A connecting sleeve is rotatably connected to the top wall of the upper mold shell 2. The connecting sleeve is coaxially fixed to the rotating shaft of the rotating disk 5. After the operator installs the driving component 8 into the mounting shell, the end of the rotating shaft of the driving component 8 is engaged in the connecting sleeve. At this time, the driving component 8 can drive the rotating disk to rotate.

[0049] Reference Figure 2 and Figure 4 When the rotating disk 5 and the ratchet 7 rotate synchronously, the actuating frame 6 moves. The end of the actuating frame 6 abuts against the outer wall of the limiting block 3, driving the limiting block 3 to slide into the limiting groove 4. Conversely, when the rotating disk 5 rotates in the opposite direction, the pressing block 14 is inserted into the traction groove 12 to drive the sliding piece 13 to slide, thereby facilitating the pulling of the limiting block 3 out of the limiting groove 4.

[0050] The implementation principle of a rotational molding die in this application embodiment is as follows: The operator opens the mold, loads the raw material into the lower mold shell 1, and then places the upper mold shell 2 over the opening of the lower mold shell 1. The drive unit 8 is activated, causing the rotating disk 5 to rotate. The end of the positioning component 9 engages with the inner wall of the slot 17, causing the ratchet 7 to rotate synchronously with the rotating disk 5, which in turn moves the actuating frame 6. The end of the actuating frame 6 abuts against the side wall of the limiting block 3, causing the limiting block 3 to slide into the limiting groove 4. Under the abutment of the positioning pin 10, the limiting block 3 is restricted. In the limiting groove 4, the upper mold shell 2 is fixed on the lower mold shell 1; after the product is formed, the driving component 8 is activated, the driving component 8 drives the rotating disk 5 to rotate, the end of the positioning component 9 slides against the outer wall of the ratchet 7, the rotating disk 5 drives the actuating frame 6 to move, so that the pressing block 14 is inserted into the traction groove 12, driving the sliding piece 13 to slide. Under the combined action of the elastic component 11 and the sliding piece 13, the positioning pin 10 slides into the limiting block 3, the ratchet 7 supports the actuating frame 6, so that the limiting block 3 slides out of the limiting groove 4, which facilitates the mold opening.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotational mould comprising a lower shell (1) and an upper shell (2) which is placed over the opening of the lower shell (1), characterised in that: Also comprising, The limiting block (3) is provided with several, the limiting block (3) and the side wall of the upper die shell (2) slip connection, the side wall of the lower die shell (1) is provided with several limiting grooves (4), the limiting groove (4) is set up one by one with the limiting block (3), the limiting block (3) can be connected in the limiting groove (4); Rotary disc (5), the rotary disc (5) and the side wall of the upper die shell (2) rotation is connected; Dial frame (6), the dial frame (6) rotation is connected in the edge position of the rotary disc (5), the end of dial frame (6) can dial the limiting block (3) slip; Ratchet (7), the ratchet (7) and the side wall of the rotary disc (5) rotation is connected, the end of dial frame (6) and the outer wall of the ratchet (7) abut; Driving member (8), the driving member (8) is set up on the upper die shell (2) for driving the rotary disc (5) rotation; Positioning member (9), the positioning member (9) is used for limiting the relative rotation between the rotary disc (5) and the ratchet (7).

2. A roto-moulding mould according to claim 1 wherein: The limiting block (3) is hollow, the inner wall of the limiting block (3) is connected with the positioning column (10) slip, the inner wall of the limiting block (3) is provided with the elastic element (11) for the end of the positioning column (10) and the inner wall of the limiting groove (4) abut.

3. A roto-moulding mould according to claim 2 wherein: The side wall of the limiting block (3) is provided with a traction groove (12), the inner wall of the traction groove (12) is slidably connected with a sliding piece (13), the end of the dial frame (6) is provided with a pressing block (14), the pressing block (14) can abut against the side wall of the sliding piece (13), the pressing block (14) is fixedly connected with the dial frame (6), and the end of the dial frame (6) can abut against the side wall of the sliding piece (13).

4. A roto-moulding mould according to claim 3 wherein: The lower die shell (1) is provided with a plurality of positioning holes, the positioning holes are located in the limiting groove (4), the opening edge of the positioning hole is provided with a rounded corner, and the positioning column (10) is inserted and matched with the positioning hole.

5. A roto-moulding mould according to claim 1 wherein: The side wall of the lower die shell (1) is provided with a guide groove, and the guide groove communicates with the limiting groove (4).

6. A roto-moulding mould according to claim 1 wherein: The side wall of the ratchet (7) is provided with a plurality of clamping grooves (17), the positioning member (9) is a ratchet pawl with a spring, and the end of the positioning member (9) is located in the clamping groove (17).

7. A roto-moulding mould according to claim 1 wherein: The side wall of the lower die shell (1) is fixed with a positioning block (19), the side wall of the positioning block (19) is provided with a positioning groove (20), the side wall of the upper die shell (2) is fixed with a sliding block (21), and the sliding block (21) is inserted and matched with the positioning groove (20).

8. A roto-moulding mould according to claim 1 wherein: The outer wall of the upper die shell (2) is fixed with a mounting frame (22), and the side wall of the mounting frame (22) is fixed with a plurality of hanging rings (23).

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