Polytetrafluoroethylene powder forming mould pressing device

Abstract

The invention relates to the technical field of compression molding, and particularly discloses a polytetrafluoroethylene powder molding device which comprises a molding press body and further comprises a regulation and control assembly, the regulation and control assembly is arranged on the lower side of a pressing table, and the regulation and control assembly automatically regulates the size of a lower mold exhaust hole according to the powder weight weighed by a feeding assembly and the mold pressure during pressurization. The size of the exhaust hole in the side edge of the lower die can be automatically adjusted through the adjusting and controlling assembly according to the powder weight weighed by the feeding assembly so as to be matched with the pressurized powder amount, the situation that exhaust is excessive or insufficient during powder raw material pressing is prevented, and in the pressurizing process, the pressure of the die is gradually increased, so that the pressure of the die is gradually increased. The opening degree of the exhaust hole is automatically and gradually reduced, transverse cracks are prevented from being caused, and if residual gas in the powder is not fully exhausted in the pressurizing process, the adjusting and controlling assembly can be controlled again through the auxiliary assembly to adjust the exhaust hole of the lower mold, so that the residual gas is exhausted, and the powder compression molding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of molding, and specifically to a molding and pressing device for polytetrafluoroethylene powder. Background Art

[0002] Polytetrafluoroethylene, commonly known as "the king of plastics", is a high molecular polymer obtained by polymerizing tetrafluoroethylene as a monomer. Polytetrafluoroethylene has excellent corrosion resistance and is one of the best materials with wear and corrosion resistance in the world today. It is widely used in various occasions that require resistance to acids, alkalis and organic solvents. Workpieces made of polytetrafluoroethylene powder raw materials have simple manufacturing processes and relatively low manufacturing costs. Therefore, molding and pressing machines for polytetrafluoroethylene powder are widely used in the machining of tetrafluoroethylene powder.

[0003] When molding polytetrafluoroethylene powder by a molding and pressing machine, polytetrafluoroethylene powder is usually added into the cavity of the lower mold of the molding and pressing machine, and then the upper mold is driven to move downward to press the powder into a dense preform. And exhaust holes are arranged on the side of the lower mold of the molding and pressing machine to discharge the gas in the powder during pressing to ensure the molding quality of the polytetrafluoroethylene molded product. However, when molding different batches of molded products, the amount of polytetrafluoroethylene powder to be pressed may vary, and there may be situations of excessive or insufficient exhaust during the pressing of the powder raw materials. Relatively large exhaust holes will lead to excessive exhaust. Although it can accelerate the discharge of gas in the powder during pressing, it will cause a sudden drop in local pressure of the mold, trigger an imbalance in the shear force between powder particles, and increase the risk of transverse hidden cracks. While relatively small exhaust holes will lead to insufficient exhaust, making the gas in the powder gap unable to be effectively discharged, forming internal bubbles or sandwich defects, significantly reducing the molding quality of the pressed product, thus affecting the molding quality of polytetrafluoroethylene powder. For this reason, we propose a molding and pressing device for polytetrafluoroethylene powder. Summary of the Invention

[0004] The purpose of the present invention is to provide a molding and pressing device for polytetrafluoroethylene powder to solve the problem that when molding polytetrafluoroethylene powder by a molding and pressing machine, for the molding and processing of different batches of molded products, the amount of polytetrafluoroethylene powder to be pressed may vary, and there may be situations of excessive or insufficient exhaust during the pressing of the powder raw materials, which affects the molding quality of polytetrafluoroethylene powder as mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A molding and pressing device for polytetrafluoroethylene powder, comprising: a molding and pressing machine body, an upper mold and a pressing table are respectively arranged inside the molding and pressing machine body, a lower mold is arranged on the pressing table, and a top block is arranged inside the lower mold;

[0006] It further includes: a feeding assembly, the feeding assembly is arranged on the pressing table, and the feeding assembly is used for powder weighing and automatic feeding into the lower mold;

[0007] A regulating component is arranged on the lower side of the pressing table. The regulating component automatically adjusts the size of the exhaust holes of the lower die according to the weight of the powder weighed by the feeding component and the magnitude of the die pressure during pressing.

[0008] An auxiliary component is arranged on the lower side of the pressing table. The auxiliary component further assists in controlling the regulation of the exhaust holes of the lower die by the regulating component according to the forming die pressure during pressing.

[0009] Among them, the feeding component includes a sliding seat arranged on the upper side of the pressing table. One side of the sliding seat is fixedly provided with the telescopic end of a cylinder, and the cylinder is fixedly arranged inside the die press body. A cylindrical body is fixedly arranged in the middle of the sliding seat. One side of the cylindrical body is fixedly communicated with a conveying pipe, the upper side of the conveying pipe is fixedly communicated with a circulation pipe, and the upper end of the circulation pipe is fixedly communicated with a storage tank fixedly arranged with the die press body. A spiral member is arranged inside the conveying pipe, and one end of the spiral member is fixedly provided with the output end of a first motor, and the first motor is fixedly arranged with the conveying pipe.

[0010] Among them, a bearing plate is arranged inside the cylindrical body, a limiting member is arranged on the lower side of the bearing plate, a first pressure sensor is installed on the upper side of the limiting member, and the output end of a second motor is fixedly arranged on one side of the limiting member, and the second motor is fixedly arranged with the cylindrical body.

[0011] Among them, the regulating component includes tapered blocks arranged at equal intervals on the side end of the lower die. A support plate is fixedly arranged at the lower side of the tapered block and fixedly arranged at the bottom end of the die press body. A first adjusting member is arranged between the two support plates. The first adjusting member includes a mounting plate fixedly arranged with the two support plates. A moving member is slidably arranged on the mounting plate. The tapered block is fixedly arranged with the moving member of the first adjusting member. A first electromagnetic block is fixedly arranged on one side of the mounting plate close to the tapered block. A first magnetic block that repels the first electromagnetic block is fixedly arranged on one side of the moving member. A first spring is fixedly arranged on one side of the moving member and fixedly arranged with the mounting plate.

[0012] Among them, a first electric push rod is fixedly arranged on one side of a support plate, the telescopic end of the first electric push rod is fixedly provided with a mounting block, sliding rails fixedly arranged with the two support plates are symmetrically slidably arranged on both sides of the mounting block, a first switch and a second switch are respectively installed on the upper side of the mounting block, and a first indicator light electrically connected to the first switch is installed outside the die press body.

[0013] Among them, the auxiliary component includes a second adjusting member arranged under the first adjusting member. The second adjusting member has the same structure as the first adjusting member. The two ends of the mounting plate of the second adjusting member are respectively fixedly arranged with the two support plates. A third switch and a fourth switch are respectively installed on the lower side of the mounting block, a second indicator light electrically connected to the third switch is installed outside the die press body, and a warning device is installed on the upper side of the die press body.

[0014] Among them, it further includes: a blowing component, which is arranged on the body of the molding press and is used for jetting and cleaning the powder remaining after the upper mold and the lower mold are molded;

[0015] a blanking component, which is arranged on one side of the pressing table and is used for weighing the molded product after molding and automatically blanking and collecting the molded product;

[0016] an adjusting component, which is arranged on the upper side of the body of the molding press and automatically adjusts the cleaning strength of the blowing component according to the powder weight measured by the feeding component and the molded product weight measured by the blanking component.

[0017] Among them, the blowing component includes an air pump fixedly arranged on the upper side of the body of the molding press. The output end of the air pump is fixedly communicated with an air pipe. One end of the air pipe is fixedly communicated with a connecting pipe fitting. One side of the connecting pipe fitting is fixedly provided with the telescopic end of a second electric push rod, and the second electric push rod is fixedly arranged on one side of the body of the molding press.

[0018] Among them, the blanking component includes a pushing member fixedly arranged on one side of the sliding seat. One side of the pressing table is fixedly provided with a guiding plate. A storage box is arranged below the guiding plate. A supporting member fixedly arranged with the body of the molding press is arranged below the storage box. A second pressure sensor is installed on the upper side of the supporting member. An aggregate box is arranged on one side of the storage box. A baffle is arranged on the side of the storage box close to the aggregate box. One side of the baffle is fixedly provided with the telescopic end of a third electric push rod, and the third electric push rod is fixedly arranged with the storage box.

[0019] Among them, the adjusting component includes a housing fixedly arranged on the upper side of the body of the molding press. Installation shells are symmetrically and fixedly arranged inside the housing. Second electromagnetic blocks are fixedly arranged in both of the two installation shells. Installation members are slidably arranged in both of the two installation shells. A second magnetic block that repels the second electromagnetic block is fixedly arranged on one side of the installation member. A second spring fixedly arranged with the inner side of the installation shell is fixedly arranged on one side of the installation member. A rotating rod member is movably arranged between the two installation members. A connecting member is fixedly arranged on the rotating rod member. A rotating frame is movably arranged outside the connecting member. A connecting shell slidably arranged with the housing is fixedly arranged on the lower side of the rotating frame. A limiting groove adapted to the connecting shell is arranged inside the housing. A rotary rheostat is fixedly arranged inside the connecting shell. The lower end of the connecting member is fixedly arranged with the knob contact piece of the rotary rheostat.

[0020] The present invention at least has the following beneficial effects:

[0021] When the present invention performs compression molding on polytetrafluoroethylene powder through a molding press body, the polytetrafluoroethylene powder is automatically added into the cavity of the lower mold through a feeding assembly, and then the upper mold is driven to move downward to press the powder into a dense preform. And through the feeding assembly, the powder can be quantitatively weighed before each powder addition to improve the molding quality of powder compression. Through a regulation assembly, the size of the exhaust holes on the side of the lower mold can be automatically adjusted according to the powder weight weighed by the feeding assembly to match the amount of powder being pressed. When the amount of powder being pressed is large, the opening degree of the exhaust holes on the side of the lower mold is automatically adjusted to be larger; conversely, when the amount of powder being pressed is small, the opening degree of the exhaust holes on the side of the lower mold is automatically adjusted to be smaller, so as to prevent excessive or insufficient exhaust during the pressing of the powder raw material, which affects the compression molding quality. And during the pressing process, as the molding pressure gradually increases, the opening degree of the exhaust holes is automatically gradually reduced to prevent high-pressure gas from rapidly escaping through the exhaust holes, resulting in a sudden change in the internal stress of the powder body and causing transverse cracks, thereby further improving the compression molding quality. If there are residual gases in the powder that are not fully discharged during the pressing process, it will cause a relatively large molding pressure. At this time, through an auxiliary assembly, the regulation assembly can be controlled again to adjust the exhaust holes of the lower mold to discharge the residual gases and improve the powder compression molding quality. Brief Description of the Drawings

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a structural schematic diagram inside the molding press body of the present invention;

[0024] Figure 3 is a structural schematic diagram of the feeding assembly of the present invention;

[0025] Figure 4 is a sectional structural schematic diagram of the cylinder part of the present invention;

[0026] Figure 5 is an exploded structural schematic diagram of the bearing plate and the limiting member of the present invention;

[0027] Figure 6 is a structural schematic diagram of the regulation assembly and the auxiliary assembly of the present invention;

[0028] Figure 7 is a sectional connection structural schematic diagram of the lower mold of the present invention;

[0029] Figure 8 is a structural schematic diagram of the connection of the mounting plate of the present invention;

[0030] Figure 9 is a structural schematic diagram of the connection of the mounting block of the present invention;

[0031] Figure 10Schematic structural diagram of the connection of the mounting block of the present invention from another perspective;

[0032] Figure 11 Schematic structural diagram of the air blowing assembly of the present invention;

[0033] Figure 12 Schematic exploded view of the storage box and the support member of the present invention;

[0034] Figure 13 Schematic cross-sectional view of the housing and the mounting shell of the present invention;

[0035] Figure 14 Schematic partial structural diagram of the mounting member of the present invention;

[0036] Figure 15 Schematic partial cross-sectional view of the rotating rod member at the connection member of the present invention.

[0037] In the figure: 11, die press body; 12, upper die; 13, pressing table; 14, lower die; 15, top block; 2, feeding assembly; 21, sliding seat; 22, cylindrical member; 23, conveying pipe; 24, storage tank; 25, circulation pipe; 26, spiral member; 27, first motor; 28, bearing plate; 29, limiting member; 210, second motor; 211, first pressure sensor; 212, cylinder; 3, regulation assembly; 31, conical block; 32, support plate; 33, first adjusting member; 331, mounting plate; 332, moving member; 333, first electromagnet; 334, first magnetic block; 335, first spring; 34, first electric push rod; 35, mounting block; 36, slide rail; 37, first switch; 38, second switch; 39, first indicator light; 4, auxiliary assembly; 41, second adjusting member; 42, third switch; 43, fourth switch; 44, second indicator light; 45, warning device; 5, air blowing assembly; 51, air pump; 52, ventilation pipe; 53, connecting member; 54, second electric push rod; 6, blanking assembly; 61, pushing member; 62, guiding plate; 63, storage box; 64, support member; 65, collecting box; 66, baffle; 67, third electric push rod; 7, adjustment assembly; 71, housing; 72, mounting shell; 73, second electromagnet; 74, mounting member; 75, second magnetic block; 76, second spring; 77, rotating rod member; 78, connecting shell; 79, limiting groove; 710, rotary rheostat; 711, connecting member; 712, rotating frame. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1

[0040] Please refer to Figures 1 to 15 , the present invention provides a technical solution: a polytetrafluoroethylene powder molding and pressing device, including: a molding press body 11, an upper mold 12 and a pressing table 13 are respectively arranged inside the molding press body 11, a lower mold 14 is arranged on the pressing table 13, and a top block 15 is arranged inside the lower mold 14;

[0041] It further includes: a feeding assembly 2, the feeding assembly 2 is arranged on the pressing table 13, and the feeding assembly 2 is used for powder weighing and automatic feeding into the lower mold 14;

[0042] A regulating assembly 3, the regulating assembly 3 is arranged on the lower side of the pressing table 13, and the regulating assembly 3 automatically adjusts the size of the exhaust holes of the lower mold 14 according to the weight of the powder weighed by the feeding assembly 2 and the magnitude of the molding pressure during pressing;

[0043] An auxiliary assembly 4, the auxiliary assembly 4 is arranged on the lower side of the pressing table 13, and the auxiliary assembly 4 further assists in controlling the adjustment of the exhaust holes of the lower mold 14 by the regulating assembly 3 according to the molding pressure during pressing.

[0044] When the polytetrafluoroethylene powder is molded by the molding press body 11, the polytetrafluoroethylene powder is automatically added into the cavity of the lower mold 14 through the feeding assembly 2, and then the upper mold 12 is driven to move downward to press the powder into a dense preform. And through the feeding assembly 2, the powder can be quantitatively weighed before each powder addition to improve the molding quality of powder molding. Through the regulation assembly 3, the size of the exhaust holes on the side of the lower mold 14 can be automatically adjusted according to the weight of the powder weighed by the feeding assembly 2 to match the amount of the pressurized powder. When the amount of the pressurized powder is large, the opening degree of the exhaust holes on the side of the lower mold 14 is automatically adjusted to be larger. On the contrary, when the amount of the pressurized powder is small, the opening degree of the exhaust holes on the side of the lower mold 14 is automatically adjusted to be smaller to prevent the situation of excessive or insufficient exhaust during the pressing of the powder raw material, which affects the molding quality of the molding. And during the pressing process, as the molding pressure gradually increases, the opening degree of the exhaust holes can be automatically and gradually reduced to prevent the high-pressure gas from rapidly escaping through the exhaust holes, resulting in a sudden change in the internal stress of the powder body and causing transverse cracks, thereby further improving the molding quality of the molding. If there are residual gases in the powder that are not fully discharged during the pressing process, it will make the molding pressure larger. At this time, through the auxiliary assembly 4, the regulation assembly 3 can be controlled again to adjust the exhaust holes of the lower mold 14 to discharge the residual gases and improve the molding quality of powder molding.

[0045] The feeding assembly 2 includes a sliding seat 21 slidably arranged on the upper side of the pressing table 13. Specifically, a guide rail is arranged on the upper side of the pressing table 13, and the sliding seat 21 is slidably arranged along the guide rail. One side of the sliding seat 21 is fixedly provided with the telescopic end of a cylinder 212, and the cylinder 212 is fixedly arranged inside the molding press body 11. The sliding seat 21 is driven by the cylinder 212 to slide on the upper side of the pressing table 13 along the guide rail. A cylinder body part 22 is fixedly arranged in the middle of the sliding seat 21. One side of the cylinder body part 22 is fixedly communicated with a conveying pipe 23, and the upper side of the conveying pipe 23 is fixedly communicated with a flow pipe 25. The flow pipe 25 is arranged as a flexible pipe to adapt to the movement of the cylinder body part 22. The upper end of the flow pipe 25 is fixedly communicated with a storage tank 24 fixedly arranged with the molding press body 11. The storage tank 24 stores the polytetrafluoroethylene powder to be molded. A sealing cover is threadedly arranged at the filling port end on the upper side of the storage tank 24. By rotating and opening the sealing cover, powder can be added into the storage tank 24. A spiral part 26 is arranged inside the conveying pipe 23. One end of the spiral part 26 is fixedly provided with the output end of a first motor 27, and the first motor 27 is fixedly arranged with the conveying pipe 23.

[0046] A bearing plate 28 is arranged inside the cylinder body part 22. A limiting part 29 is arranged on the lower side of the bearing plate 28. A first pressure sensor 211 is installed on the upper side of the limiting part 29. One side of the limiting part 29 is fixedly provided with the output end of a second motor 210, and the second motor 210 is fixedly arranged with the cylinder body part 22;

[0047] During use, through the circulation pipe 25, the powder in the storage tank 24 can be introduced into the conveying pipe 23. By driving the rotation of the spiral member 26 with the first motor 27, the powder is pushed into the cylindrical member 22 by the spiral member 26 and falls onto the upper side of the bearing plate 28. The weight of the powder on the bearing plate 28 can be detected by the first pressure sensor 211. When the preset powder amount is reached, the first motor 27 is controlled to stop working, and the conveying of the powder is stopped. When adding powder into the cavity of the lower die 14, the telescopic end of the cylinder 212 is controlled to drive the slide seat 21 and the cylindrical member 22 to move to the upper side of the lower die 14. The second motor 210 drives the limiting member 29 to rotate downward, so that the powder on the bearing plate 28 enters the cavity of the lower die 14 through the lower opening of the cylindrical member 22, thus completing the addition of the powder.

[0048] The regulating assembly 3 includes tapered blocks 31 movably arranged at equal intervals on the side end of the lower die 14. Correspondingly, tapered exhaust holes adapted to the tapered blocks 31 are arranged at equal intervals on the side end of the lower die 14. A first adjusting member 33 is arranged below the tapered block 31 between two support plates 32 fixedly arranged at the bottom end of the molding press body 11. The first adjusting member 33 includes a mounting plate 331 fixedly arranged with the two support plates 32. A moving member 332 is slidably arranged on the mounting plate 331. The tapered block 31 is fixed to the moving member 332 of the first adjusting member 33. A through groove adapted to the moving member 332 is arranged on the mounting plate 331. The moving member 332 is slidably arranged along the through groove, which can play a role in guiding and limiting the moving member 332. A first electromagnetic block 333 is fixedly arranged on one side of the mounting plate 331 close to the tapered block 31. The molding press body 11 is provided with a pressure sensor to monitor the pressure change during the pressing process. The pressure sensor of the molding press body 11, the first pressure sensor 211 and the first electromagnetic block 333 are electrically connected. A first magnetic block 334 that repels the first electromagnetic block 333 is fixedly arranged on one side of the moving member 332. A first spring 335 fixedly arranged with the mounting plate 331 is fixedly arranged on one side of the moving member 332.

[0049] A first electric push rod 34 is fixedly arranged on one side of one support plate 32. The telescopic end of the first electric push rod 34 is fixedly arranged with a mounting block 35. Slide rails 36 fixedly arranged with the two support plates 32 are symmetrically slidably arranged on both sides of the mounting block 35. The mounting block 35 is slidably arranged along the slide rails 36. A first switch 37 and a second switch 38 are respectively arranged on the upper side of the mounting block 35. A first indicator light 39 electrically connected to the first switch 37 is arranged on the outside of the molding press body 11.

[0050] When molding products of the same batch by compression molding, the mold pressure value is preset in advance by the controller, and pre-pressing debugging is carried out first. When the mold pressure reaches the set value, through the pressure detection of the pressure sensor of the mold press body 11 and the first pressure sensor 211, the magnetic force of the first electromagnetic block 333 will change, causing the moving part 332 to move away from the lower mold 14. By controlling the telescopic end of the first electric push rod 34 to drive the mounting block 35 to move closer to the lower mold 14. When the lower end of the moving part 332 presses against the first switch 37, the first electric push rod 34 stops working, and the first indicator light 39 is controlled to light up. At this time, for the compression molding of products of the same batch, the position of the moving part 332 corresponding to the molding mold pressure is the position where the mounting block 35 is located at this time, so as to ensure the subsequent adjustment of the opening degree of the conical exhaust holes on the side of the lower mold 14;

[0051] After adding powder into the cavity of the lower mold 14 through the feeding assembly 2, the air cylinder 212 drives the sliding seat 21 to move back and reset, and the first motor 27 is controlled to work again, and powder is continuously conveyed to the upper side of the bearing plate 28 and quantitatively weighed. For compression molding with different powder amounts, the pressure detected by the first pressure sensor 211 will be different. When the powder amount is large, the pressure detected by the first pressure sensor 211 will be large, making its resistance value small and the current in the circuit large, so that the repulsive force of the first electromagnetic block 333 on the first magnetic block 334 is large, causing the moving part 332 to drive the conical block 31 to move away from the lower mold 14 by a large distance, and the first spring 335 is compressed. Thus, the opening degree of the conical exhaust holes on the side of the lower mold 14 can be made larger during the initial compression molding to adapt to the exhaust during compression molding of a large amount of powder. On the contrary, when the powder amount is small, the moving part 332 will drive the conical block 31 to move away from the lower mold 14 by a relatively small distance, making the opening degree of the conical exhaust holes on the side of the lower mold 14 smaller to adapt to the exhaust during compression molding of a small amount of powder. Therefore, the size of the exhaust holes of the lower mold 14 can be automatically adjusted according to the amount of powder being pressed, so as to prevent the situation of excessive or insufficient exhaust during the pressing of powder raw materials, which may affect the quality of compression molding;

[0052] When driving the upper die 12 to move downward to press the powder in the cavity of the lower die 14, the molding pressure is detected by the pressure sensor of the molding press body 11. As the molding pressure increases, the pressure detected by the pressure sensor of the molding press body 11 will increase, causing its resistance value to increase and the current in the circuit to decrease. As a result, the repulsive force generated by the first electromagnet 333 on the first magnetic block 334 decreases. Under the elastic force of the first spring 335, the moving part 332 gradually moves closer to the lower die 14, driving the tapered block 31 to move towards the inside of the tapered exhaust hole of the lower die 14, thereby gradually reducing the opening degree of the tapered exhaust hole and preventing high-pressure gas from rapidly escaping through the exhaust hole, which may cause sudden changes in the internal stress of the powder body and trigger transverse cracks, improving the molding quality. When the moving part 332 moves closer to the lower die 14 until the lower end of the moving part 332 presses against the second switch 38, it indicates that the molding pressure has been reached, and the first electromagnet 333 will be controlled to cut off the power. Under the elastic force of the first spring 335, the moving part 332 drives the tapered block 31 to block the tapered exhaust hole to ensure the powder molding quality.

[0053] The auxiliary component 4 includes a second adjusting part 41 arranged on the lower side of the first adjusting part 33. The structure of the second adjusting part 41 is the same as that of the first adjusting part 33. Both ends of the mounting plate 331 of the second adjusting part 41 are fixedly arranged with the two side support plates 32 respectively. A third switch 42 and a fourth switch 43 are respectively installed on the lower side of the mounting block 35. A second indicator light 44 electrically connected to the third switch 42 is installed on the outside of the molding press body 11, and a warning device 45 is installed on the upper side of the molding press body 11.

[0054] Through the pressure detection of the pressure sensor of the molding press body 11 and the first pressure sensor 211, the same magnetic force change can be generated on the first electromagnet 333 of the first adjusting part 33 and the second adjusting part 41 at the same time. During the initial pre-pressing debugging, through the first electromagnets 333 of the first adjusting part 33 and the second adjusting part 41 respectively, the moving parts 332 of the first adjusting part 33 and the second adjusting part 41 can move the same distance away from the lower die 14. When the first electric push rod 34 drives the mounting block 35 to move closer to the lower die 14, when the lower end of the moving part 332 of the first adjusting part 33 presses against the first switch 37, at the same time, the upper end of the moving part 332 of the second adjusting part 41 will also press against the third switch 42, causing the second indicator light 44 to light up. Therefore, during the pre-pressing debugging, if both the first indicator light 39 and the second indicator light 44 are on, it means that both the control component 3 and the auxiliary component 4 are working properly. Otherwise, it means that there are faults in the control component 3 and the auxiliary component 4 and need to be checked.

[0055] During the molding process, when the lower end of the moving part 332 of the first adjusting part 33 presses against the second switch 38, the first electromagnetic block 333 that controls the first adjusting part 33 is powered off, and when the conical block 31 blocks the conical exhaust hole, if there is residual gas in the powder that has not been fully discharged, the molding pressure will be relatively large. As a result, the magnetic force of the first electromagnetic block 333 of the second adjusting part 41 will continue to decrease, causing the moving part 332 of the second adjusting part 41 to move closer to the lower mold 14. When the upper end of the moving part 332 of the second adjusting part 41 presses against the fourth switch 43, it will control the first electromagnetic block 333 of the first adjusting part 33 to be powered on again, and the moving part 332 of the first adjusting part 33 will drive the conical block 31 to move outwards a little, so as to open the conical exhaust hole a little again to discharge the residual gas and improve the quality of powder molding; at the same time, the pressing against the fourth switch 43 can control the warning device 45 to issue a warning to prompt the staff to check the relevant situation.

[0056] Embodiment 2

[0057] It further includes: a blowing assembly 5, which is arranged on the molding press body 11 and is used for jetting and cleaning the residual powder on the upper mold 12 and the lower mold 14 after molding;

[0058] A blanking assembly 6, which is arranged on one side of the pressing table 13 and is used for weighing the molded product after molding and automatically blanking and collecting the molded product;

[0059] An adjusting assembly 7, which is arranged on the upper side of the molding press body 11. The adjusting assembly 7 automatically adjusts the cleaning intensity of the blowing assembly 5 according to the powder weight weighed by the feeding assembly 2 and the molded product weight weighed by the blanking assembly 6.

[0060] The blowing assembly 5 includes an air pump 51 fixed on the upper side of the molding press body 11. The output end of the air pump 51 is fixedly connected and communicated with an air pipe 52. The air pipe 52 is set as a flexible pipe to adapt to the movement of the connecting pipe part 53. One end of the air pipe 52 is fixedly connected and communicated with the connecting pipe part 53. The other two ends of the connecting pipe part 53 face the upper and lower sides respectively. One side of the connecting pipe part 53 is fixedly provided with the telescopic end of a second electric push rod 54, and the second electric push rod 54 is fixed on one side of the molding press body 11. A filter is installed on one side of the input end of the air pump 51 to filter the gas;

[0061] After the molding is completed and the upper mold 12 is driven to move upwards, by controlling the telescopic end of the second electric push rod 54 to drive the connecting pipe part 53 to move between the upper mold 12 and the lower mold 14, the air pump 51 transports the gas through the air pipe 52 to the connecting pipe part 53, and the gas is respectively ejected from the upper and lower ends of the connecting pipe part 53 to jet and clean the residual powder on the upper mold 12 and the lower mold 14 after molding, so as to improve the subsequent molding quality.

[0062] The blanking assembly 6 includes a pusher 61 fixedly arranged on one side of the slide base 21. A material guide plate 62 is fixedly arranged on one side of the pressing table 13. A storage box 63 is arranged below the material guide plate 62. The material guide plate 62 is inclined downward towards the storage box 63. A support member 64 fixedly connected to the die press body 11 is arranged below the storage box 63. A second pressure sensor is installed on the upper side of the support member 64. An aggregate box 65 is arranged on one side of the storage box 63. A baffle 66 is arranged on the side of the storage box 63 close to the aggregate box 65. The telescopic end of a third electric push rod 67 is fixedly arranged on one side of the baffle 66. The third electric push rod 67 is fixedly connected to the storage box 63. The inner bottom surface of the storage box 63 is provided with a downward slope towards the baffle 66.

[0063] The adjusting assembly 7 includes a housing 71 fixedly arranged on the upper side of the die press body 11. Installation shells 72 are symmetrically and fixedly arranged inside the housing 71. Second electromagnetic blocks 73 are fixedly arranged in both installation shells 72. One second electromagnetic block 73 is electrically connected to the first pressure sensor 211, and the other second electromagnetic block 73 is electrically connected to the second pressure sensor. Installation members 74 are slidably arranged in both installation shells 72. One side of the installation member 74 movably penetrates through the side end of the installation shell 72. A second magnetic block 75 that repels the second electromagnetic block 73 is fixedly arranged on one side of the installation member 74. A second spring 76 fixedly connected to the inner side of the installation shell 72 is fixedly arranged on one side of the installation member 74. A rotating rod member 77 is movably arranged between the two installation members 74. Through grooves are symmetrically arranged on both sides of the rotating rod member 77. One ends of the two installation members 74 are respectively movably arranged in the through grooves on both sides. A connecting member 711 is fixedly arranged on the rotating rod member 77. A rotating frame 712 is movably arranged outside the connecting member 711. A connecting shell 78 slidably arranged with the housing 71 is fixedly arranged on the lower side of the rotating frame 712. A limiting groove 79 adapted to the connecting shell 78 is arranged inside the housing 71. When the installation member 74 moves, it can drive the connecting shell 78 to move along the limiting groove 79. A knob-type rheostat 710 is fixedly arranged inside the connecting shell 78. The lower end of the connecting member 711 is fixedly arranged with the knob contact piece of the knob-type rheostat 710. The knob-type rheostat 710 is electrically connected to the air pump 51.

[0064] A gas expansion cylinder is provided on the lower side of the top block 15. After the molding is completed and the upper mold 12 is driven to move upward, the top block 15 is driven to move upward by the gas expansion cylinder, and the molded product after molding can be ejected. The telescopic end of the control cylinder 212 drives the slide seat 21 to move close to the lower mold 14. The ejected molded product is pushed towards the guide plate 62 by the pusher 61 and enters the storage box 63 through the guide plate 62. Then, the cylinder 212 drives the slide seat 21 to move in the reverse direction and reset. After the molded product after molding enters the storage box 63, it will cause the pressure detected by the second pressure sensor to increase, resulting in a decrease in its resistance value, so that the repulsive force generated by the other second electromagnet 73 on the other second magnetic block 75 is relatively large, causing the other mounting member 74 to move away from the other second electromagnet 73. Similarly, by detecting the weight of the powder on the upper side of the bearing plate 28 by the first pressure sensor 211, the mounting member 74 on one side can be made to move away from the second electromagnet 73 on one side, that is, both mounting members 74 will move outward, and the second spring 76 is compressed; when there is relatively more powder remaining after the upper mold 12 and the lower mold 14 are molded, the pressure detected by the second pressure sensor will be relatively small, which will in turn cause the repulsive force generated by the other second electromagnet 73 on the other second magnetic block 75 to be relatively small, resulting in a relatively small outward movement distance of the other mounting member 74, which will in turn cause a relatively large angular deflection of the rotating rod member 77. Through the connecting member 711, the knob contact of the rotary variable resistor 710 can be driven to rotate by a relatively large angle, so that the resistance value of the rotary variable resistor 710 decreases relatively much, and thus the power of the air pump 51 can be made relatively large, thereby increasing the amount and force of the gas ejected through the connecting pipe 53 and improving the cleaning effect on the relatively more powder remaining after the upper mold 12 and the lower mold 14 are molded; then, the telescopic end of the third electric push rod 67 drives the baffle 66 to move outward, opening the opening on one side of the storage box 63. Under the action of the slope on the inner bottom surface of the storage box 63, the molded product enters the aggregate box 65 under the action of gravity for collection.

[0065] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0066] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polytetrafluoroethylene powder molding and pressing device, comprising: A molding press body (11), an upper mold (12) and a pressing table (13) are respectively arranged inside the molding press body (11), a lower mold (14) is arranged on the pressing table (13), and a top block (15) is arranged inside the lower mold (14); It is characterized in that: it further includes: a feeding component (2), the feeding component (2) is arranged on the pressing table (13), and the feeding component (2) is used for powder weighing and automatically feeding into the lower mold (14); A regulating component (3), the regulating component (3) is arranged on the lower side of the pressing table (13), and the regulating component (3) automatically adjusts the size of the exhaust holes of the lower mold (14) according to the weight of the powder weighed by the feeding component (2) and the magnitude of the molding pressure during pressing; An auxiliary component (4), the auxiliary component (4) is arranged on the lower side of the pressing table (13), and the auxiliary component (4) further assists in controlling the adjustment of the exhaust holes of the lower mold (14) by the regulating component (3) according to the molding pressure during pressing.

2. The polytetrafluoroethylene powder molding and pressing device according to claim 1, characterized in that: The feeding component (2) includes a sliding seat (21) arranged on the upper side of the pressing table (13), the telescopic end of a cylinder (212) is fixedly arranged on one side of the sliding seat (21), the cylinder (212) is fixedly arranged inside the molding press body (11), a cylindrical body part (22) is fixedly arranged in the middle of the sliding seat (21), a conveying pipe (23) is fixedly connected to one side of the cylindrical body part (22), a flow pipe (25) is fixedly connected to the upper side of the conveying pipe (23), a storage tank (24) fixedly connected to the molding press body (11) is fixedly connected to the upper end of the flow pipe (25), a spiral part (26) is arranged inside the conveying pipe (23), one end of the spiral part (26) is fixedly arranged at the output end of a first motor (27), and the first motor (27) is fixedly arranged with the conveying pipe (23).

3. The polytetrafluoroethylene powder molding and pressing device according to claim 2, wherein: A bearing plate (28) is arranged inside the cylindrical body part (22), a limiting part (29) is arranged on the lower side of the bearing plate (28), a first pressure sensor (211) is installed on the upper side of the limiting part (29), the output end of a second motor (210) is fixedly arranged on one side of the limiting part (29), and the second motor (210) is fixedly arranged with the cylindrical body part (22).

4. The polytetrafluoroethylene powder molding and pressing device according to claim 1, characterized in that: The regulating component (3) includes conical blocks (31) arranged at equal intervals on the side end of the lower mold (14), two support plates (32) fixedly arranged at the bottom end of the molding press body (11) are arranged on the lower side of the conical blocks (31), a first adjusting part (33) is arranged between the two support plates (32), the first adjusting part (33) includes a mounting plate (331) fixedly arranged with the two support plates (32), a moving part (332) is slidably arranged on the mounting plate (331), the conical block (31) is fixedly arranged with the moving part (332) of the first adjusting part (33), a first electromagnetic block (333) is fixedly arranged on one side of the mounting plate (331) close to the conical block (31), a first magnetic block (334) repelling the first electromagnetic block (333) is fixedly arranged on one side of the moving part (332), and a first spring (335) fixedly arranged with the mounting plate (331) is fixedly arranged on one side of the moving part (332).

5. The polytetrafluoroethylene powder molding and pressing device according to claim 4, characterized in that: On one side of a said support plate (32), a first electric push rod (34) is fixedly installed. The telescopic end of the first electric push rod (34) is fixedly installed with a mounting block (35). On both sides of the mounting block (35), slide rails (36) fixedly installed with the support plates (32) on both sides are symmetrically arranged. On the upper side of the mounting block (35), a first switch (37) and a second switch (38) are respectively installed. On the outside of the molding press body (11), a first indicator light (39) electrically connected to the first switch (37) is installed.

6. The polytetrafluoroethylene powder molding and pressing device according to claim 5, characterized in that: The said auxiliary component (4) includes a second adjusting component (41) arranged under the first adjusting component (33). The second adjusting component (41) has the same structure as the first adjusting component (33). Both ends of the mounting plate (331) of the second adjusting component (41) are fixedly installed with the support plates (32) on both sides. On the lower side of the mounting block (35), a third switch (42) and a fourth switch (43) are respectively installed. On the outside of the molding press body (11), a second indicator light (44) electrically connected to the third switch (42) is installed. On the upper side of the molding press body (11), a warning device (45) is installed.

7. The polytetrafluoroethylene powder molding and pressing device according to claim 2, wherein: It further includes: A blowing component (5), the blowing component (5) is arranged on the molding press body (11), and the blowing component (5) is used for jetting and cleaning the powder remaining after the upper die (12) and the lower die (14) are molded; A blanking component (6), the blanking component (6) is arranged on one side of the pressing table (13), and the blanking component (6) is used for weighing the molded product after molding and automatically blanking and collecting the molded product; An adjusting component (7), the adjusting component (7) is arranged on the upper side of the molding press body (11), and the adjusting component (7) automatically adjusts the cleaning intensity of the blowing component (5) according to the powder weight weighed by the feeding component (2) and the molded product weight weighed by the blanking component (6).

8. The polytetrafluoroethylene powder molding and pressing device according to claim 7, characterized in that: The said blowing component (5) includes an air pump (51) fixedly installed on the upper side of the molding press body (11). The output end of the air pump (51) is fixedly communicated with an air pipe (52). One end of the air pipe (52) is fixedly communicated with a connecting pipe fitting (53). On one side of the connecting pipe fitting (53), the telescopic end of a second electric push rod (54) is fixedly installed. The second electric push rod (54) is fixedly installed on one side of the molding press body (11).

9. The polytetrafluoroethylene powder molding and pressing device according to claim 7, characterized in that: The said blanking component (6) includes a pushing member (61) fixedly installed on one side of the sliding seat (21). On one side of the pressing table (13), a guiding plate (62) is fixedly installed. Under the guiding plate (62), a storage box (63) is arranged. Under the storage box (63), a supporting member (64) fixedly installed with the molding press body (11) is arranged. On the upper side of the supporting member (64), a second pressure sensor is installed. On one side of the storage box (63), an aggregate box (65) is arranged. On the side of the storage box (63) close to the aggregate box (65), a baffle (66) is arranged. On one side of the baffle (66), the telescopic end of a third electric push rod (67) is fixedly installed. The third electric push rod (67) is fixedly installed with the storage box (63).

10. The polytetrafluoroethylene powder molding and pressing device according to claim 7, characterized in that: The adjusting assembly (7) includes a housing (71) fixed to the upper side of the die press body (11). Inside the housing (71), mounting shells (72) are symmetrically fixed. Second electromagnetic blocks (73) are fixed inside both of the mounting shells (72). Mounting members (74) are slidably arranged inside both of the mounting shells (72). A second magnetic block (75) that repels the second electromagnetic block (73) is fixed to one side of the mounting member (74). A second spring (76) fixed to the inner side of the mounting shell (72) is fixed to one side of the mounting member (74). A rotating rod member (77) is movably arranged between the two mounting members (74). A connecting member (711) is fixed to the rotating rod member (77). A rotating frame (712) is movably arranged outside the connecting member (711). A connecting shell (78) that is slidably arranged with the housing (71) is fixed to the lower side of the rotating frame (712). A limiting groove (79) adapted to the connecting shell (78) is arranged inside the housing (71). A knob-type rheostat (710) is fixed inside the connecting shell (78). The lower end of the connecting member (711) is fixed to the knob contact of the knob-type rheostat (710).

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