Back support forming die

Abstract

The utility model provides a back support forming die, belongs to the technical field of office chair back support forming dies, and aims to solve the problems that in the lubricating oil filling process, lubricating oil is likely to leak on the outer surface of a lower die, the leaked lubricating oil can pollute the surface of a formed back support, the attractiveness of a finished product of the back support is affected, and the service life of the back support is prolonged. Comprising a die base, a support lower die, a support upper die, a T-shaped frame, a fixed-point oil dropping mechanism and a positioning mechanism. The bracket lower die is arranged above the die base; the bracket upper die is arranged above the bracket lower die; the number of the T-shaped frames is four, and the four T-shaped frames are fixedly connected to the interior of the support lower die. The fixed-point oil dropping mechanism is arranged in the bracket lower die; and the positioning mechanism is arranged in the bracket lower die. According to the utility model, lubricating oil can be accurately dripped right above the eight groups of anti-needle-print ejection heads at fixed points, so that the surface of the formed back bracket is prevented from being polluted by the lubricating oil, and the attractiveness of the finished product of the back bracket is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of office chair back support molding dies, and more specifically, particularly relates to a back support molding dies. Background Art

[0002] When producing the back bracket of a plastic office chair, a special mold is used for production. The molding mold for the back bracket of the office chair is usually composed of an upper mold, a lower mold, an ejector pin, a cooling mechanism, a cylinder rod and a gate. The space formed between the upper mold and the lower mold is a cavity, and multiple sets of ejectors are located below the lower mold. When in use, the fluidized plastic is injected into the cavity through the gate. After molding, it is first cooled by a cooling mechanism, and then the cylinder rod pushes multiple sets of ejectors to push out the molded back bracket. Then the operator can take down the back bracket.

[0003] The existing application number is: CN202120346554.2. The utility model discloses an office chair seat forming mold, including a lower mold base, a lower pad, a lower mold plate and a guide column. The lower mold base is internally connected with a limit plate, and one end of the limit plate is provided with a through hole, and one end of the limit plate is rotatably connected with a screw. The upper surface of the lower mold base is fixedly connected with the lower pad, and the lower pad is internally connected with a return spring, and the lower surface of the return spring fits the upper surface of the limit plate. In the office chair seat forming mold, when the guide column moves upward, the connecting rod drives the baffle plate to move, so that the baffle plate releases the closure of the oil tank, and then the lubricating oil can be automatically added. When the guide column moves upward, the baffle plate moves downward by its own gravity, so that the baffle plate closes the oil tank, so that it can be opened and closed automatically, saving manpower and improving the overall degree of automation.

[0004] Based on the above, in the actual production process, it is usually required to maintain an appropriate gap between the ejector pin and the inside of the lower mold. After the molding mold has been used for a long time, the ejector pin will generate a large friction with the inside of the lower mold during the ejection process, and it is easy for the ejector pin to get stuck in the lower mold and cannot be ejected. Therefore, workers are required to add lubricating oil around the ejector pin. The ejector pin is small in size and is inside the lower mold. During the process of adding lubricating oil, it is easy for the lubricating oil to leak on the outer surface of the lower mold. The leaked lubricating oil will contaminate the surface of the back bracket after molding, affecting the aesthetics of the finished back bracket. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a back support forming mold to solve the problem that lubricating oil is easily leaked on the outer surface of the lower mold during the existing process of adding lubricating oil. The leaked lubricating oil will contaminate the surface of the back support after molding, affecting the aesthetics of the finished back support.

[0006] The purpose and effect of the back support forming mold of the utility model are achieved by the following specific technical means:

[0007] The back support forming mold comprises a mold base, a support lower mold, a support upper mold, a T-shaped frame, a first cylinder push rod, a second cylinder push rod, an anti-pin mark head, a fixed-point dripping oil mechanism and a positioning mechanism;

[0008] The bracket lower mold is arranged above the mold base;

[0009] The bracket upper mold is arranged above the bracket lower mold;

[0010] There are four groups of T-shaped frames, which are respectively fixedly connected to the inside of the bracket lower mold;

[0011] There are four groups of first cylinder push rods, and the four groups of first cylinder push rods are respectively fixedly connected to the sides of four groups of T-shaped frames;

[0012] There are eight groups of second cylinder push rods, and the eight groups of second cylinder push rods are respectively fixedly connected to the sides of four groups of T-shaped frames;

[0013] There are eight groups of anti-needle mark heads, which are respectively slid inside the four groups of T-shaped frames, and are respectively fixedly connected to one end of the eight groups of second cylinder push rods;

[0014] The fixed-point oil dripping mechanism is arranged inside the lower mold of the bracket;

[0015] The positioning mechanism is arranged inside the bracket lower mold.

[0016] Further, the positioning mechanism includes a bidirectional rack and a first transmission gear;

[0017] There are four groups of bidirectional racks, which slide inside four groups of T-shaped frames respectively, and are fixedly connected to one end of four groups of first cylinder push rods respectively. Both sides of the four groups of bidirectional racks are provided with multiple groups of trapezoidal teeth.

[0018] There are eight groups of the first transmission gears in total. The eight groups of first transmission gears are rotatably connected to the sides of four groups of T-shaped frames respectively, and the eight groups of first transmission gears are respectively meshed with four groups of bidirectional racks.

[0019] Furthermore, the positioning mechanism also includes a second transmission gear and a transmission rod;

[0020] There are eight groups of second transmission gears, which are rotatably connected to the sides of four groups of T-shaped frames respectively, and the eight groups of second transmission gears are respectively meshed with the eight groups of first transmission gears;

[0021] There are eight groups of transmission rods in total, and the eight groups of transmission rods are respectively fixedly connected to the outer peripheries of the eight groups of second transmission gears.

[0022] Furthermore, the fixed-point oil dripping mechanism includes an oil pot and a hollow column;

[0023] There are eight groups of oil pots in total, and the eight groups of oil pots are respectively fixedly connected to the sides of the eight groups of transmission rods, and one end of the eight groups of oil pots is provided with a group of through holes;

[0024] There are eight groups of hollow columns, which are respectively fixedly connected to one end of eight groups of oil pots. One end of the eight groups of hollow columns is provided with a group of through holes, and the diameter of the through holes of the eight groups of hollow columns is the same as that of the eight groups of oil pots.

[0025] Furthermore, the fixed-point oil dripping mechanism also includes a first disc, a return spring and a second disc;

[0026] There are eight groups of the first disks, which are fixedly connected to the inside of the eight groups of hollow columns respectively, and each of the eight groups of the first disks is provided with a group of through holes;

[0027] There are eight groups of return springs, which are respectively arranged inside eight groups of hollow columns, and one end of the eight groups of return springs is respectively fixedly connected to the side surfaces of the eight groups of first discs;

[0028] There are eight groups of the second discs, which are respectively arranged inside eight groups of hollow columns, and are respectively fixedly connected to the other ends of eight groups of reset springs. A group of through holes is arranged inside the eight groups of second discs.

[0029] Furthermore, the fixed-point oil dripping mechanism also includes an oil dripping tube and an oil dripping hole;

[0030] There are eight groups of oil dripping tubes, which are respectively fixedly connected to the inner circumferences of the through holes in the eight second discs, and are respectively arranged on the inner circumferences of the through holes in the eight first discs. The eight groups of oil dripping tubes are respectively arranged on the inner circumferences of the through holes in the eight hollow columns and the eight oil pots, and one end of the eight groups of oil dripping tubes is respectively arranged inside the eight oil pots.

[0031] There are eight groups of oil drip holes in total, and the eight groups of oil drip holes are respectively arranged on the outer peripheries of the other ends of the eight groups of oil drip pipes.

[0032] Furthermore, the fixed-point oil dripping mechanism also includes a conical oil dripping head and a semicircular fixed shell;

[0033] There are eight groups of semicircular fixed shells, which are respectively fixedly connected to the outer circumferences of the other ends of the eight groups of oil dripping pipes;

[0034] There are eight groups of conical oil dripping heads, which are respectively fixedly connected to the outer peripheries of eight groups of semicircular fixed shells. The eight groups of conical oil dripping heads are all hollow structures. When the lubricating oil flows out from the eight groups of oil dripping holes, it will flow out from the inside of the eight groups of conical oil dripping heads.

[0035] Compared with the prior art, the utility model has the following beneficial effects:

[0036] The utility model arranges a positioning mechanism, when the four groups of first cylinder push rods push the four groups of two-way racks, they will drive the eight groups of first transmission gears to rotate, and the eight groups of first transmission gears rotate and drive the eight groups of transmission rods to swing to the top of the eight groups of anti-needle mark heads through the eight groups of second transmission gears, so that when the four groups of first cylinder push rods are started, the eight groups of transmission rods can swing to the top of the eight groups of anti-needle mark heads at a fixed point.

[0037] The utility model arranges a fixed-point oil dripping mechanism. When the eight transmission rods swing to the top of the eight anti-needle-marking heads, the eight oil pots are driven to swing to the top of the eight anti-needle-marking heads. At this time, the eight conical oil dripping heads are directly opposite to the top of the eight anti-needle-marking heads. The gravity of the eight conical oil dripping heads can cause the eight oil dripping tubes to move downward. The downward movement of the eight oil dripping tubes can cause the eight oil dripping holes to be exposed from the inside of the eight hollow columns. The lubricating oil in the eight oil pots can flow through the eight oil dripping holes of the eight oil dripping tubes to the top of the eight anti-needle-marking heads, thereby avoiding the situation that the oil is easily spilled on the outer surface of the lower mold of the bracket during manual oiling.

[0038] The utility model has the function of being able to accurately drop lubricating oil into the top of eight groups of anti-needle-marking heads at a fixed point, thus avoiding the lubricating oil from contaminating the surface of the formed back bracket, improving the finished product aesthetics of the back bracket, and improving the work efficiency of filling the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0040] Figure 2 It is a schematic diagram of the upper mold structure of the bracket of the utility model.

[0041] Figure 3 It is a schematic diagram of the lower mold structure of the bracket of the utility model.

[0042] Figure 4 It is a structural schematic diagram of the positioning mechanism of the utility model.

[0043] Figure 5 It is a schematic diagram of the anti-needle mark head structure of the utility model.

[0044] Figure 6 It is a structural schematic diagram of the fixed-point oil dripping mechanism of the utility model.

[0045] Figure 7 It is a structural schematic diagram of the oil dripping pipe of the utility model.

[0046] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0047] 1. Mold base; 2. Bracket lower mold; 3. Bracket upper mold; 4. T-frame; 5. First cylinder push rod; 6. Bidirectional rack; 7. First transmission gear; 8. Second transmission gear; 9. Transmission rod; 10. Oil pot; 11. Oil dripping pipe; 1101. Oil dripping hole; 12. Hollow column; 13. First disc; 14. Reset spring; 15. Second disc; 16. Conical oil dripping head; 1601. Semicircular fixed shell; 17. Second cylinder push rod; 18. Anti-pin mark head. DETAILED DESCRIPTION

[0048] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0049] Embodiment 1:

[0050] As attached Figure 1 To Attachment Figure 5 As shown:

[0051] The utility model provides a back support molding die, comprising a die base 1, a support lower die 2, a support upper die 3, a T-shaped frame 4, a first cylinder push rod 5, a second cylinder push rod 17, an anti-needle mark head 18 and a positioning mechanism;

[0052] The bracket lower mold 2 is arranged above the mold base 1;

[0053] The bracket upper mold 3 is arranged above the bracket lower mold 2;

[0054] There are four groups of T-shaped frames 4, and the four groups of T-shaped frames 4 are fixedly connected to the inside of the bracket lower mold 2;

[0055] There are four groups of first cylinder push rods 5, and the four groups of first cylinder push rods 5 are respectively fixedly connected to the sides of four groups of T-shaped frames 4;

[0056] There are eight groups of second cylinder push rods 17, and the eight groups of second cylinder push rods 17 are respectively fixedly connected to the sides of four groups of T-shaped frames 4;

[0057] There are eight groups of anti-needle mark heads 18, which are respectively slid inside the four groups of T-shaped frames 4, and are respectively fixedly connected to one end of the eight groups of second cylinder push rods 17;

[0058] The positioning mechanism is arranged inside the bracket lower mold 2 .

[0059] Wherein, the positioning mechanism includes a bidirectional rack 6 and a first transmission gear 7;

[0060] There are four groups of bidirectional racks 6, which slide inside four groups of T-shaped frames 4 respectively, and are fixedly connected to one end of four groups of first cylinder push rods 5 respectively. Both sides of the four groups of bidirectional racks 6 are provided with multiple groups of trapezoidal teeth.

[0061] There are eight groups of first transmission gears 7 , which are rotatably connected to the sides of four groups of T-shaped frames 4 , and are meshed with four groups of bidirectional racks 6 , respectively.

[0062] Wherein, the positioning mechanism further includes a second transmission gear 8 and a transmission rod 9;

[0063] There are eight groups of second transmission gears 8, which are rotatably connected to the sides of four groups of T-shaped frames 4, and mesh with eight groups of first transmission gears 7 respectively.

[0064] There are eight groups of transmission rods 9 in total, and the eight groups of transmission rods 9 are fixedly connected to the outer peripheries of the eight groups of second transmission gears 8 respectively.

[0065] The specific usage and function of the first embodiment are as follows:

[0066] In use, when the eight groups of second cylinder push rods 17 are started, the eight groups of second cylinder push rods 17 will push out the eight groups of anti-needle print heads 18, and the eight groups of anti-needle print heads 18 will push out the formed back bracket when pushing out. The eight groups of anti-needle print heads 18 can effectively avoid the problem that the eight groups of anti-needle print heads 18 leave marks on the surface of the formed back bracket when pushing out the formed back bracket, thereby improving the aesthetics of the product. When it is necessary to add lubricating oil to the four groups of anti-needle print heads 18, the bracket lower mold 2 is taken out from above the mold base 1. Next, the four groups of first cylinder push rods 5 are started, the four groups of first cylinder push rods 5 will push the four groups of two-way racks 6, when the four groups of two-way racks 6 are pushed, they will drive the eight groups of first transmission gears 7 to rotate, the eight groups of first transmission gears 7 rotate to drive the eight groups of second transmission gears 8 to rotate, the eight groups of second transmission gears 8 rotate to drive the eight groups of transmission rods 9 to swing to the top of the eight groups of anti-needle printing heads 18, so that when the four groups of first cylinder push rods 5 are started, the eight groups of transmission rods 9 can swing to the top of the eight groups of anti-needle printing heads 18 at a fixed point.

[0067] Embodiment 2:

[0068] Based on the first embodiment, Figures 1 to 7 As shown, it also includes a fixed-point oil dripping mechanism, which is arranged inside the bracket lower mold 2;

[0069] The fixed-point oil dripping mechanism includes an oil pot 10 and a hollow column 12;

[0070] There are eight groups of oil pots 10, which are fixedly connected to the sides of eight groups of transmission rods 9, and one end of each of the eight groups of oil pots 10 is provided with a group of through holes.

[0071] There are eight groups of hollow columns 12, which are respectively fixedly connected to one end of eight groups of oil pots 10. One end of the eight groups of hollow columns 12 is provided with a group of through holes, and the diameter of the through holes of the eight groups of hollow columns 12 is the same as the diameter of the through holes of the eight groups of oil pots 10.

[0072] The fixed-point oil dripping mechanism further includes a first disc 13, a return spring 14 and a second disc 15;

[0073] There are eight groups of first disks 13, and the eight groups of first disks 13 are fixedly connected to the inside of eight groups of hollow columns 12, respectively. A group of through holes is provided inside each of the eight groups of first disks 13;

[0074] There are eight groups of return springs 14, which are respectively arranged inside eight groups of hollow columns 12, and one end of the eight groups of return springs 14 is respectively fixedly connected to the side surfaces of eight groups of first discs 13;

[0075] There are eight groups of second disks 15 , which are respectively arranged inside eight groups of hollow columns 12 , and are respectively fixedly connected to the other ends of eight groups of return springs 14 . A group of through holes is provided inside the eight groups of second disks 15 .

[0076] The fixed-point oil dripping mechanism further includes an oil dripping tube 11 and an oil dripping hole 1101;

[0077] There are eight groups of oil dripping tubes 11, which are respectively fixedly connected to the inner circumferences of the through holes in the eight groups of second discs 15, and are respectively arranged on the inner circumferences of the through holes in the eight groups of first discs 13. The eight groups of oil dripping tubes 11 are respectively arranged on the inner circumferences of the through holes in the eight groups of hollow columns 12 and the eight groups of oil pots 10, and one end of the eight groups of oil dripping tubes 11 is respectively arranged inside the eight groups of oil pots 10.

[0078] There are eight groups of oil drip holes 1101 in total, and the eight groups of oil drip holes 1101 are respectively arranged on the outer periphery of the other end of the eight groups of oil drip tubes 11 .

[0079] The fixed-point oil dripping mechanism further includes a conical oil dripping head 16 and a semicircular fixed shell 1601;

[0080] There are eight groups of semicircular fixed shells 1601, and the eight groups of semicircular fixed shells 1601 are respectively fixedly connected to the outer circumference of the other ends of the eight groups of dripping oil pipes 11;

[0081] There are eight groups of conical oil drip heads 16, which are respectively fixedly connected to the outer periphery of eight groups of semicircular fixed shells 1601. The eight groups of conical oil drip heads 16 are all hollow structures. When the lubricating oil flows out from the eight groups of oil drip holes 1101, it will flow out from the inside of the eight groups of conical oil drip heads 16.

[0082] The specific usage and function of the second embodiment are as follows:

[0083] The lubricating oil in the eight oil pots 10 will flow through the eight sets of oil drip holes 1101 of the eight sets of oil drip tubes 11 to the top of the eight sets of anti-needle print heads 18, thereby avoiding the situation that the oil is easily spilled on the outer surface of the bracket lower mold 2 during manual oiling, avoiding the lubricating oil from contaminating the surface of the back bracket after molding, improving the aesthetics of the finished product of the back bracket, and improving the appearance of the finished product of the back bracket. When the four groups of first cylinder push rods 5 are bundled, the four groups of first cylinder push rods 5 are retracted. When the four groups of first cylinder push rods 5 are retracted, the eight groups of oil pots 10 are restored to the horizontal position through a series of transmission cooperation. At this time, the elastic force of the eight groups of reset springs 14 will be greater than the gravity of the eight groups of conical oil drip heads 16. Under the action of the elastic force, the eight groups of reset springs 14 retract the eight groups of oil drip holes 1101 of the eight groups of oil drip tubes 11 through the eight groups of second discs 15. The hollow structure inside the eight groups of hollow columns 12 will block the eight groups of oil drip holes 1101, thereby preventing the lubricating oil inside the eight groups of oil pots 10 from flowing out through the eight groups of oil drip holes 1101 of the eight groups of oil drip tubes 11 when the eight groups of oil pots 10 are in the horizontal position, thereby preventing the lubricating oil inside the eight groups of oil pots 10 from leaking, and preventing the lubricating oil inside the eight groups of oil pots 10 from leaking inside the lower mold 2 of the bracket.

Claims

1. A back support molding die, comprising a die base (1), a support lower die (2), a support upper die (3), a T-shaped frame (4), a first cylinder push rod (5), a second cylinder push rod (17), an anti-pin mark head (18), a fixed-point oil dripping mechanism and a positioning mechanism; the support lower die (2) is arranged above the die base (1); the support upper die (3) is arranged above the support lower die (2); characterized in that: There are four groups of T-shaped frames (4), and the four groups of T-shaped frames (4) are respectively fixedly installed inside the bracket lower mold (2); there are four groups of the first cylinder push rods (5), and the four groups of the first cylinder push rods (5) are respectively fixedly installed on the sides of the four groups of T-shaped frames (4); the fixed-point dripping oil mechanism is arranged inside the bracket lower mold (2); the positioning mechanism is arranged inside the bracket lower mold (2); there are eight groups of the second cylinder push rods (17), and the eight groups of the second cylinder push rods (17) are respectively fixedly installed on the sides of the four groups of T-shaped frames (4); there are eight groups of the anti-needle print heads (18), and the eight groups of the anti-needle print heads (18) are respectively slid inside the four groups of T-shaped frames (4), and the eight groups of the anti-needle print heads (18) are respectively fixedly connected to one end of the eight groups of the second cylinder push rods (17).

2. The back support forming mold according to claim 1, characterized in that: The positioning mechanism comprises a bidirectional rack (6) and a first transmission gear (7); there are four groups of the bidirectional rack (6), the four groups of the bidirectional rack (6) are respectively slid inside the four groups of T-shaped frames (4), and the four groups of the bidirectional rack (6) are respectively fixedly connected to one end of the four groups of first cylinder push rods (5); there are eight groups of the first transmission gear (7), the eight groups of the first transmission gear (7) are respectively rotatably mounted on the side surfaces of the four groups of T-shaped frames (4), and the eight groups of the first transmission gear (7) are respectively meshed with the four groups of the bidirectional rack (6).

3. The back support forming mold according to claim 2, characterized in that: The positioning mechanism further comprises a second transmission gear (8) and a transmission rod (9); there are eight groups of the second transmission gear (8), the eight groups of the second transmission gear (8) are rotatably mounted on the sides of the four groups of T-shaped frames (4), and the eight groups of the second transmission gear (8) are respectively meshed with the eight groups of the first transmission gear (7); There are eight groups of transmission rods (9) in total, and the eight groups of transmission rods (9) are respectively fixedly mounted on the outer peripheries of eight groups of second transmission gears (8).

4. The back support forming mold according to claim 1, characterized in that: The fixed-point oil dripping mechanism comprises an oil pot (10) and a hollow column (12); there are eight groups of the oil pot (10), and the eight groups of oil pots (10) are respectively fixedly mounted on the sides of eight groups of transmission rods (9); there are eight groups of the hollow column (12), and the eight groups of hollow columns (12) are respectively fixedly mounted on one end of the eight groups of oil pots (10).

5. The back support forming mold according to claim 4, characterized in that: The fixed-point oil dripping mechanism further comprises a first disc (13), a return spring (14) and a second disc (15); there are eight groups of the first discs (13), the eight groups of the first discs (13) are respectively fixedly mounted inside the eight groups of hollow columns (12), and a group of through holes are provided inside the eight groups of the first discs (13); there are eight groups of the return springs (14), the eight groups of the return springs (14) are respectively arranged inside the eight groups of hollow columns (12), and one end of the eight groups of the return springs (14) is respectively fixedly connected to the side surfaces of the eight groups of the first discs (13); there are eight groups of the second discs (15), the eight groups of the second discs (15) are respectively arranged inside the eight groups of hollow columns (12), the eight groups of the second discs (15) are respectively fixedly mounted on the other end of the eight groups of the return springs (14), and a group of through holes are provided inside the eight groups of the second discs (15).

6. The back support forming mold according to claim 4, characterized in that: The fixed-point oil dripping mechanism further comprises an oil dripping tube (11) and an oil dripping hole (1101); there are eight groups of the oil dripping tube (11), and the eight groups of the oil dripping tube (11) are respectively fixedly mounted on the inner peripheries of the internal through holes of the eight groups of second discs (15); the eight groups of the oil dripping tube (11) are respectively arranged on the inner peripheries of the through holes of the eight groups of first discs (13), the eight groups of hollow columns (12) and the eight groups of oil pots (10); one end of the eight groups of the oil dripping tube (11) is respectively arranged inside the eight groups of oil pots (10); there are eight groups of the oil dripping hole (1101), and the eight groups of the oil dripping hole (1101) are respectively arranged on the outer peripheries of the other ends of the eight groups of the oil dripping tube (11).

7. The back support forming mold according to claim 4, characterized in that: The fixed-point oil dripping mechanism further comprises a conical oil dripping head (16) and a semicircular fixed shell (1601); there are eight groups of the semicircular fixed shell (1601), and the eight groups of the semicircular fixed shell (1601) are respectively fixedly mounted on the outer periphery of the other end of the eight groups of oil dripping tubes (11); there are eight groups of the conical oil dripping heads (16), and the eight groups of the conical oil dripping heads (16) are respectively fixedly mounted on the outer periphery of the eight groups of the semicircular fixed shell (1601).

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