Bent pipe pressure casting device and using method

Abstract

The invention relates to the technical field of bent pipe casting, and discloses a bent pipe pressure casting device and a using method.The casting device comprises a machine base, an injection head and a hydraulic rod fixed to the upper portion of the machine base, the telescopic end of the hydraulic rod is connected with an upper die, a lower die is connected to the machine base in an inserted mode, and the casting core part comprises a die core inserted into a die cavity; the die core and the plurality of die pieces are connected and combined into a bent pipe shape through connecting pieces; the agent spraying part comprises a capsule embedded in the lower mold and a supporting plate fixed below the upper mold, and further comprises a hose and a branch pipe which penetrate through the connecting piece, and a through hole and a spray head which penetrate through the mold piece and the mold core; the self-closing part comprises I-shaped plates which are symmetrically inserted into the mold core and the mold piece, and a plurality of oblique square holes which penetrate through the I-shaped plates and are uniformly formed; through the collaborative design of the agent spraying part, the casting core part and the self-closing part, full-automatic spraying of the release agent and self-closing of the spraying hole in the mold closing process are achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elbow casting, and in particular to an elbow pressure casting device and a use method thereof. Background Art

[0002] Bent pipes usually have a curvature and are hollow inside. During the casting process of bent pipes, the upper and lower molds need to be pressed together, and liquid metal is injected into the mold cavity. The liquid metal is die-casted and cooled in cooperation with the mold core in the mold cavity, and is formed into the shape of the bent pipe. The casting work is usually carried out using a pipe bending die-casting machine. The traditional method usually involves spraying a release agent into the mold cavity manually or with independent equipment before closing the mold, which has problems such as process interruption and low efficiency.

[0003] While there have been attempts to integrate demolding systems, these have often been difficult to implement due to complex structures or interference with core components. For example, while a removable core design facilitates mold removal, internal spray holes can be easily clogged by molten metal seepage, making precise spraying in conjunction with mold closing difficult.

[0004] Therefore, there is an urgent need for a casting device that can be deeply integrated with a detachable mold core and can automatically complete efficient and reliable spraying. Summary of the Invention

[0005] The present invention provides a pipe bending pressure casting device and a method for using the same, so as to solve the problems that the existing pipe bending pressure casting device is difficult to automatically spray a release agent during the mold closing process, especially has poor compatibility with a detachable mold core structure, and adds additional production steps.

[0006] In order to solve the above technical problems, the technical solutions of the present invention are as follows: In a first aspect, a pipe bending pressure casting device includes a machine base and a hydraulic rod fixed above the machine base, wherein the telescopic end of the hydraulic rod is connected to an upper mold, a lower mold is plugged into the machine base, and the lower mold is located below the upper mold, a mold cavity is defined between the mating surfaces of the upper and lower molds, an injection mechanism is connected to the front face of the lower mold, and an output end of the injection mechanism is communicated with the mold cavity, and further includes: The core casting part is inserted into the mold cavity on the lower mold to cast the hollow elbow and facilitate mold removal; it includes a mold core inserted into the mold cavity and a plurality of mold pieces evenly divided by the bending mold core, and the mold core and the plurality of mold pieces are connected and combined into the shape of the elbow through a connector; The spraying unit is provided on the mold surface between the upper and lower molds and is located within the casting core portion to spray a release agent into the mold cavity when the mold is closed. The spraying unit includes a capsule embedded in the lower mold and a support plate fixed below the upper mold. The support plate corresponds to the position of the capsule to squeeze the capsule. The spraying unit also includes a hose and a branch pipe provided through the connector, and a through hole and a spray head provided through the mold sheet and the mold core. The self-closing part is symmetrically inserted on the mold core and the mold piece, and is connected to the spray part to close the through hole after spraying the release agent; it includes an I-shaped plate symmetrically inserted on the mold core and the mold piece, and a plurality of oblique square holes evenly opened through the I-shaped plate, and the oblique square holes correspond to the positions of the through holes, and the I-shaped plate is connected to the capsule through a trigger member.

[0007] Furthermore, the core casting part includes a core piece and a connecting piece, the core piece is arranged in the mold cavity, and the connecting piece is plugged into the core piece to position the core piece, and the core piece includes: T-slots are provided on the lower die and are located at both ends of the die cavity; There are multiple T-plates, one of which is fixed to the rear end of the mold core and the other is fixed to the end of the mold piece away from the mold core; The T-plate is plugged into the T-slot; Insert holes are provided in the mold core and the mold piece.

[0008] Furthermore, the connecting piece includes: A chain is inserted into the socket; A hose is provided through the chain and one end of which is closed; The cannula is connected to the other end of the hose and passes through the T-plate.

[0009] Furthermore, the spray part includes a pressure storage part and a spray discharge part. The pressure storage part is arranged on the upper mold and the lower mold. The spray discharge part is connected to the hose and passes through the mold core and the mold piece. The pressure storage part includes: The groove is symmetrically opened on the lower die; The capsule is arranged in the groove, and one side is fixedly connected to the lower mold; A one-way valve is symmetrically arranged on the front of the lower mold and extends into the groove to communicate with the capsule; The lower end of the support plate is rotatably connected to a pressing roller corresponding to the position of the groove so as to squeeze the capsule.

[0010] Furthermore, the spray discharge part includes: The L-tube is symmetrically fixed in the lower die, with one end connected to the T-slot; a second one-way valve connected to the other end of the L-tube, extending to the groove and communicating with the capsule; There are multiple rubber rings, which are fixed on the inner side of the L-tube and the outer side of the cannula respectively; The lower end of the cannula is inserted into the inner side of the upper end of the L-tube to form a seal with the rubber ring; Through-jet parts, through-chain, core and die settings.

[0011] Furthermore, the spray-through parts include: There are multiple branch pipes that pass through the chain and are evenly arranged, corresponding to the positions of the through holes and connected to the hoses; The sealing gasket is fixed to the end of the branch pipe away from the hose, corresponds to the position of the through hole, and fits with the mold core and the mold piece; There are multiple nozzles embedded in the mold core and the mold piece, corresponding to the positions of the through holes respectively.

[0012] Furthermore, the self-closing portion includes a trigger and a blocking member, the blocking member is connected to the trigger, and the blocking member is elastically connected to the mold core and the mold piece, and the blocking member includes: The two I-shaped plates have curvatures that match the contours of the mold core and the mold piece; a connecting plate connected between the I-shaped plates and located away from the mold core, in the direction of one end of one of the mold pieces; The connecting plate is elastically connected to the mold piece; The clearance groove is symmetrically opened on the lower die, connected with the T-slot and the die cavity, and is located on the outside of the connecting plate; The L-groove is symmetrically opened on the upper die and communicates with the die cavity, and is located on the outside of the connecting plate; The plugging parts are embedded and elastically arranged in the mold core and the mold piece, and are symmetrically arranged and staggered with the oblique square holes.

[0013] Furthermore, the blocking part includes: The receiving grooves are symmetrically and evenly arranged on the mold core and the mold piece, and are respectively located on the side of the through hole and the oblique square hole away from the connecting plate; There are multiple plugs, which are arranged in the receiving groove and are elastically connected to the inner wall of the receiving groove respectively; The plug and the oblique square hole have the same inclination angle and can cooperate with each other so that the oblique square hole fits the plug.

[0014] Furthermore, the triggering member includes: A pull rope, one end of which is fixedly connected to the connecting plate and located above the hose, and the other end of which is movable and passes through the T-plate; A movable groove is provided through the T-plate at one end close to the capsule; a baffle, which is disposed in the movable groove and elastically connected to the T-plate and to the other end of the drawstring; The glue column is sequentially arranged through the lower mold, one end of which is located in the T-slot and corresponds to the movable slot, and the other end is located in the capsule; The connecting rope has one end connected to the capsule and the other end connected to the rubber column through a connecting component.

[0015] In a second aspect, a method for using a pipe bending pressure casting device comprises: The hydraulic rod is controlled to extend, driving the upper and lower molds to pre-close. The upper mold drives the support plate and the pressure roller to insert into the groove of the lower mold, squeezing the capsule to shrink and deform. Then the hydraulic rod is controlled to retract to separate the upper and lower molds. The support plate and the pressure roller exit the groove to elastically reset the capsule, and the release agent is sucked from the external pipeline through the one-way valve for storage; Then the hydraulic rod is controlled to extend again, driving the upper and lower molds to completely close the mold. The support plate and the pressure roller squeeze the capsule for the second time, so that the mold release agent inside is pressed into the L-tube through the second one-way valve. The mold release agent flows through the cannula, the hose, and the branch pipe in sequence, and is finally sprayed into the mold cavity through the nozzle. During the mold closing process, the capsule is pressed to push the pressure plate and the rubber column, and the rubber column squeezes the baffle, compressing the second spring, relaxing the pull rope, and contracting the first spring, pulling the connecting plate and the I-shaped plate toward the mold. The oblique square hole of the I-shaped plate is aligned with the receiving slot, and the plug pops out under the action of the third spring to seal the oblique square hole; Then the injection mechanism is started to inject the molten metal into the mold cavity through the injection hole. The molten metal cooperates with the mold core, mold piece, I-plate and plug in the mold cavity and cools to form a hollow elbow. Finally, the hydraulic rod is controlled to retract, the upper mold and the lower mold are separated, and the formed elbow and the internal mold core, mold piece, and I-plate are extracted vertically upward. The insert tube and the chain are pulled out, and multiple mold pieces and mold cores are taken out from the elbow in turn. The chain is reinserted in order for assembly, and the assembled mold core and mold piece are inserted into the T-slot of the lower mold through the T-plate to reset.

[0016] The above solution of the present invention includes at least the following beneficial effects: Through the coordinated design of the spray part, the core casting part and the self-closing part, the upper mold squeezes the capsule to generate pressure when the mold is closed, so that the release agent is transported to the nozzle inside the mold core and the mold piece through the hose and branch pipe to be atomized and sprayed out without additional processes. The self-closing part is linked to the plug through the I-plate to automatically seal the through-hole after spraying to prevent the molten metal from seeping into the spray hole and causing blockage. The hose and branch pipe run through the chain and are taken out in turn with the mold core and mold piece after demoulding, which not only supports the rapid disassembly of the mold piece, but also ensures the reusability of the channel. Therefore, the pressure casting device can realize the fully automatic spraying of the release agent and the self-sealing of the spray hole during the mold closing process, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An overall three-dimensional diagram of a pipe bending pressure casting device provided by an embodiment of the present invention; Figure 2 A three-dimensional diagram of the lower mold, injection mechanism and mold core assembly provided in an embodiment of the present invention; Figure 3 The embodiment of the present invention provides Figure 2 Schematic diagram of the structure at A in FIG; Figure 4 A three-dimensional diagram of a lower mold provided by an embodiment of the present invention; Figure 5A three-dimensional diagram of a mold core provided in an embodiment of the present invention; Figure 6 The embodiment of the present invention provides Figure 4 Schematic diagram of the structure at B in FIG; Figure 7 A three-dimensional exploded view of a combination of a die and a cannula and a T-plate provided in an embodiment of the present invention; Figure 8 A three-dimensional diagram of an upper mold provided by an embodiment of the present invention; Figure 9 A planar cross-sectional view of an upper mold provided by an embodiment of the present invention; Figure 10 A three-dimensional diagram of an I-shaped plate provided in an embodiment of the present invention; Figure 11 A cross-sectional plan view of a lower mold provided by an embodiment of the present invention; Figure 12 The embodiment of the present invention provides Figure 11 Schematic diagram of the structure at C in FIG; Figure 13 The embodiment of the present invention provides Figure 11 Schematic diagram of the structure at D in FIG; Figure 14 The embodiment of the present invention provides Figure 11 Schematic diagram of the structure at E in FIG; Figure 15 The embodiment of the present invention provides Figure 11 Schematic diagram of the structure at F in FIG; Figure 16 A three-dimensional diagram of a support plate and a pressure roller assembly provided in an embodiment of the present invention; Figure 17 A schematic diagram of the planar structure of the first spring after rebounding provided by an embodiment of the present invention; Figure 18 The embodiment of the present invention provides Figure 10 Schematic diagram of the structure at G in FIG; Figure 19 The embodiment of the present invention provides Figure 10 Schematic diagram of the structure at H in .

[0018] Description of reference numerals: In the figure: 1. Machine base; 2. Support; 3. Guide rod; 4. Hydraulic rod; 5. Controller; 6. Press seat; 7. Upper die; 8. Lower die; 9. Cavity; 10. Injection hole; 11. Injection mechanism; 12. Mold core; 13. Die piece; 14. Insert hole; 15. T-slot; 16. T-plate; 17. Chain; 18. Hose; 19. Insert tube; 20. L-tube; 21. Rubber ring; 22. Groove; 23. Capsule; 24. One-way valve; 25. Support plate; 26. Press roller ; 27. Branch pipe; 28. Sealing gasket; 29. ​​Through hole; 30. Nozzle; 31. I-shaped plate; 32. Oblique square hole; 33. Make way groove; 34. Connecting plate; 35. First spring; 36. Pull rope; 37. L-slot; 38. Movable slot; 39. Second spring; 40. Baffle; 41. Rubber column; 42. Pressure plate; 43. Connecting rope; 44. Storage slot; 45. Third spring; 46. Plug; 47. Notch; 48. Slot; 49. Second one-way valve. DETAILED DESCRIPTION

[0019] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0020] like Figures 1 to 19 As shown, an embodiment of the present invention provides a bent pipe pressure casting device, comprising a machine base 1 and a hydraulic rod 4 fixed above the machine base 1, wherein the telescopic end of the hydraulic rod 4 is connected to an upper die 7, a lower die 8 is plugged into the machine base 1, and the lower die 8 is located below the upper die 7, a mold cavity 9 is defined between the mating surfaces of the upper die 7 and the lower die 8, an injection mechanism 11 is connected to the front of the lower die 8, and the output end of the injection mechanism 11 is communicated with the mold cavity 9, and further comprising: The core casting part is inserted into the mold cavity 9 on the lower mold 8 to cast the hollow elbow and facilitate mold removal; it includes a mold core 12 inserted into the mold cavity 9, and a plurality of mold pieces 13 evenly divided by the bending mold core 12. The mold core 12 and the plurality of mold pieces 13 are connected and assembled into the shape of the elbow through a connector; The spraying unit is provided at the mating surface of the upper mold 7 and the lower mold 8 and is located within the core portion to spray a release agent into the mold cavity 9 when the mold is closed. The spraying unit includes a capsule 23 embedded in the lower mold 8 and a support plate 25 fixed below the upper mold 7. The support plate 25 corresponds to the position of the capsule 23 to squeeze the capsule 23. The spraying unit also includes a hose 18 and a branch pipe 27 provided through the connecting member, as well as a through hole 29 provided through the mold sheet 13 and the mold core 12, and a spray head 30. The capsule 23 is connected to the hose 18 via the connecting member. The self-closing part is symmetrically inserted on the mold core 12 and the mold piece 13, and is connected to the spray part to close the through hole 29 after spraying the release agent; it includes an I-shaped plate 31 symmetrically inserted on the mold core 12 and the mold piece 13, and a plurality of oblique square holes 32 evenly opened through the I-shaped plate 31, and the oblique square holes 32 correspond to the positions of the through holes 29, and the I-shaped plate 31 is connected to the capsule 23 through a trigger.

[0021] Specifically, a support 2 is fixed to the front of the machine base 1, and a guide rod 3 is symmetrically fixed on the machine base 1. The hydraulic rod 4 is fixedly connected to the upper end of the guide rod 3 through a supporting component. A controller 5 is fixed to one side of the hydraulic rod 4 through a connecting component. A pressure seat 6 is provided on the outer side of the guide rod 3, and the pressure seat 6 is fixedly connected to the telescopic end of the hydraulic rod 4. The upper mold 7 is inserted under the pressure seat 6. The mating surfaces of the upper mold 7 and the lower mold 8 are provided with an injection hole 10, and the injection hole 10 is connected to the mold cavity 9 and the output end of the injection mechanism 11.

[0022] The machine base 1 can provide stable support for the guide rod 3 and the lower mold 8, the support 2 can stably support the injection mechanism 11, the injection mechanism 11 can inject the molten metal into the mold cavity 9, the guide rod 3 can provide movement guidance and limiting function for the pressure seat 6, the hydraulic rod 4 can use the telescopic end to push the pressure seat 6 to move up and down along the guide rod 3 under the support of the guide rod 3, and the pressure seat 6 can provide support for the upper mold 7.

[0023] During the actual application of this embodiment: the staff can operate the controller 5 to control the operation of the pressure casting device according to the needs of the actual situation, control the extension of the hydraulic rod 4, so that the hydraulic rod 4 can use the telescopic end to push the pressure seat 6 to move downward, so that the pressure seat 6 drives the upper mold 7 to move downward together, and then the upper mold 7 and the lower mold 8 are closed. Then, the controller 5 is used to control the operation of the injection mechanism 11, so that the molten metal is hydraulically injected into the injection hole 10 and injected into the mold cavity 9 along the injection hole 10, so that the molten metal cooperates with the mold core 12 and the mold piece 13 in the mold cavity 9 to cool and form into the shape of a bent pipe. Then, the hydraulic rod 4 is controlled to extend again, so that the pressure seat 6 drives the upper mold 7 to separate from the lower mold 8, and then the formed bent pipe and the mold core 12 and the mold piece 13 are taken out vertically upward.

[0024] As a preferred embodiment of the present invention, the core casting part includes a mold core 12 and a connecting piece. The mold core 12 is arranged in the mold cavity 9, and the connecting piece is plugged into the mold core 12 to position the mold core 12. The mold core 12 includes: T-slots 15 are provided on the lower die 8 and are located at both ends of the die cavity 9; There are multiple T-plates 16, one of which is fixed to the rear end of the core 12, and the other is fixed to one end of the mold piece 13 away from the core 12; The T-plate 16 is plugged into the T-slot 15; Insertion holes 14 are formed through the mold core 12 and the mold piece 13 .

[0025] Specifically, the mold core 12 and the mold piece 13 can provide an opening space for the socket 14, the lower mold 8 can provide an opening space for the T-slot 15, the T-slot 15 can provide an interlocking and plugging space for the T-plate 16, and the T-plate 16 can provide support for the mold piece 13 and the mold core 12 under the support of the lower mold 8. The combination of multiple mold pieces 13 can form the shape of the bend of the bent pipe, and can cooperate with the mold core 12, the mold cavity 9, the I-plate 31 and the plug 46 to achieve the function of shaping the bent pipe.

[0026] Connectors include: Chain 17, inserted into the socket 14; A hose 18 is provided through the chain 17 and has one end closed; The cannula 19 is connected to the other end of the hose 18 and passes through the T-plate 16 .

[0027] Specifically, the socket 14 can provide a through channel and insertion space for the chain 17. The chain 17 needs to be inserted into the socket 14 in a state that can swing and bend laterally, so that the chain 17 can support the insertion of multiple mold pieces 13 to prevent longitudinal bending, so that the multiple mold pieces 13 and the mold core 12 can be combined into the shape of a bent pipe under the support of the chain 17, and the chain 17 can provide stable support for the hose 18, and the T-plate 16 can provide stable support for the insert tube 19. The insert tube 19 and the L-tube 20 can play a positioning role when plugged in.

[0028] In the actual application process of this embodiment, after the bend is formed and the upper mold 7 and the lower mold 8 are separated, the staff needs to use a tool to pull the formed bend upward, so that the core mold 12 and the die 13 drive the T plate 16 to be pulled out of the T groove 15 upward under the action of external force, and the insert 19 will be pulled out of the L tube 20. Then the staff needs to pull the insert 19 and drive the chain 17 to be pulled out of the socket 14 through the insert 19, thereby releasing the connection and support of the multiple die pieces 13 and the core mold 12, and then remove the multiple die pieces 13 that are disconnected and supported from one end of the formed bend in turn, and reuse the socket 14 to be inserted in sequence on the outside of the chain 17, and finally remove the core mold 12 from the other end of the formed bend, and remove the removed die pieces 13. The core mold 12 is plugged into the outside of the chain 17 using the socket 14 to cooperate with the core mold 12. When pulling the bent pipe, it is necessary to drive the I-plate 31 out of the formed bent pipe through the connecting plate 34, and when re-inserting the mold piece 13 and the core mold 12, pay attention to plugging the I-plate 31 with multiple mold pieces 13 and the core mold 12 (the I-plate 31 is elastic and can be deformed under the action of external force), so that the removed I-plate 31, mold piece 13 and core mold 12 are reassembled with the chain 17, and then the reassembled mold piece 13 and core mold 12 are re-plugged and reset into the mold cavity 9 using the cooperation of the T-plate 16 and the T-slot 15, so that the device can easily remove the core mold 12 and mold piece 13 for the plasticity of the bent pipe from the formed bent pipe and reuse them.

[0029] As a preferred embodiment of the present invention, the spray section includes a pressure storage component and a spray discharge component. The pressure storage component is provided on the upper mold 7 and the lower mold 8. The spray discharge component is connected to the hose 18 and is provided through the mold core 12 and the mold piece 13. The pressure storage component includes: The groove 22 is symmetrically provided on the lower die 8; The capsule 23 is disposed in the groove 22 and fixedly connected to the lower mold 8 on one side; A one-way valve 24 is symmetrically arranged on the front surface of the lower mold 8 and extends into the groove 22 to communicate with the capsule 23; The lower end of the support plate 25 is rotatably connected to a pressing roller 26 , which corresponds to the position of the groove 22 so as to squeeze the capsule 23 .

[0030] Specifically, the one-way valve 24 can be connected to the connecting pipeline for conveying the release agent liquid, and can make the liquid flow only toward the capsule 23, preventing the liquid in the capsule 23 from flowing out in the opposite direction. The lower mold 8 can provide an opening space for the groove 22, and the groove 22 can provide an insertion and movement space for the support plate 25 and the pressure roller 26, and can provide a movement space for the capsule 23. The lower mold 8 can provide a stable support for the capsule 23, and the capsule 23 and the groove 22 can provide a storage space for the release agent. The one-way valve 24 is a valve type, and can be opened under the action of the suction force generated by the deformation of the capsule 23, so that the release agent in the connecting pipeline can be sucked into the capsule 23. The support plate 25 can provide rotation support for the pressure roller 26 under the support of the upper mold 7, and the pressure roller 26 can rotate under the support of the support plate 25 under the action of external force.

[0031] The spray parts include: The L tube 20 is symmetrically fixed in the lower mold 8, and one end is connected to the T groove 15; The second one-way valve 49 is connected to the other end of the L-tube 20 and extends to the groove 22 and communicates with the capsule 23; There are multiple rubber rings 21, which are fixed on the inner side of the L-tube 20 and the outer side of the cannula 19 respectively; The lower end of the cannula 19 is inserted into the inner side of the upper end of the L-tube 20 to form a seal with the rubber ring 21; The through-spraying parts are arranged through the chain 17, the mold core 12 and the mold piece 13.

[0032] Specifically, the lower mold 8 can provide stable support for the L-tube 20, the L-tube 20 and the insert 19 can provide stable support for the rubber ring 21, and the L-tube 20 can provide support for the second one-way valve 49. The second one-way valve 49 can only provide a channel for the release agent in the capsule 23 to enter the L-tube 20, and the L-tube 20 can cooperate with the seal of the rubber ring 21 to provide a channel for the release agent to enter the insert 19.

[0033] The spray parts include: There are multiple branch pipes 27 that pass through the chain 17 and are evenly arranged, corresponding to the positions of the through holes 29 and connected to the hose 18; The sealing gasket 28 is fixed to the end of the branch pipe 27 away from the hose 18 and corresponds to the position of the through hole 29, and is in contact with the mold core 12 and the mold piece 13; There are multiple nozzles 30 , which are embedded in the mold core 12 and the mold piece 13 and correspond to the positions of the through holes 29 respectively.

[0034] Specifically, the chain 17 can provide a stable support for the branch pipe 27, the insert 19 can provide a channel for the release agent to enter the hose 18, and the hose 18 can provide a channel for the release agent to enter the branch pipe 27, and the sealing gasket 28 can use its elasticity to fit with the mold core 12 and the mold piece 13 to play a sealing role, so that the release agent can pass through the branch pipe 27 and the sealing gasket 28 into the through hole 29, and the through hole 29 can provide a channel for the release agent to enter the nozzle 30, and the nozzle 30 can atomize the release agent and spray it into the mold cavity 9.

[0035] In actual application of this embodiment, before using the device, the staff needs to connect the pipeline for conveying the release agent with the one-way valve 24, and then control the hydraulic rod 4 to extend to close and open the upper mold 7 and the lower mold 8, thereby performing pre-molding. During the pre-molding process, the upper mold 7 will drive the support plate 25 and the pressure roller 26 to insert into the groove 22, so that the support plate 25 and the pressure roller 26 squeeze the capsule 23 to shrink and deform. After the upper mold 7 and the lower mold 8 are separated, the support plate 25 and the pressure roller 26 are pulled out of the groove 22, and the capsule 23 will rebound elastically, thereby sucking the release agent in the connecting pipeline into the capsule 23 for storage through the one-way valve 24. When the upper mold 7 and the lower mold 8 are closed for die-casting, the upper mold 7 will drive the support plate 25 and the pressure roller 26 to move downward together, so that the pressure roller 26 and the support plate 25 use external force to During the mold closing process, the capsule 23 is squeezed to deform and shrink the space inside the capsule 23, so that the capsule 23 squeezes the release agent stored inside through the second one-way valve 49 and discharges it into the L tube 20, and flows into the insert pipe 19 through the L tube 20. Then the release agent passes through the insert pipe 19 into the hose 18, fills the hose 18 and flows into the branch pipe 27 through the hose 18. Then, under the action of the squeezing force of the capsule 23, the release agent passes through the branch pipe 27 and the sealing gasket 28 and flows into the through hole 29, and flows into the nozzle 30 along the through hole 29, so that the nozzle 30 uses the pressure generated by the squeezing of the capsule 23 to atomize the release agent and spray it into the mold cavity 9, thereby realizing automatic spraying of the release agent into the mold cavity 9 during the mold closing process, integrating the mold core 12, the mold piece 13 and the spraying function to improve work efficiency.

[0036] As a preferred embodiment of the present invention, the self-closing portion includes a trigger and a blocking member, the blocking member is connected to the trigger, and the blocking member is elastically connected to the mold core 12 and the mold piece 13, and the blocking member includes: The I-shaped plate 31 has a curvature that matches the contours of the mold core 12 and the mold piece 13; The connecting plate 34 is connected between the I-shaped plates 31 and is located away from the mold core 12 and in the direction of one end of one of the mold pieces 13; The connecting plate 34 is elastically connected to the mold piece 13; The clearance groove 33 is symmetrically provided on the lower die 8 and communicates with the T-slot 15 and the die cavity 9 and is located outside the connecting plate 34; L-shaped grooves 37 are symmetrically formed on the upper die 7 and communicate with the die cavity 9 and are located outside the connecting plate 34; The blocking parts are embedded and elastically arranged in the mold core 12 and the mold piece 13, and are symmetrically arranged and staggered with the oblique square holes 32.

[0037] Specifically, the mold core 12 and the mold piece 13 can provide an interlocking and plug-in space for the I-plate 31, so that the mold core 12 and multiple mold pieces 13 can be connected to each other, and the connecting plate 34 can connect the two connecting plates 34 to each other. A first spring 35 is fixed on the side of the connecting plate close to the mold piece 13, and the first spring 35 is connected to one of the mold pieces 13 away from the mold core 12, and the first spring 35 is in a stretched energy storage state. The lower mold 8 can provide an opening space for the clearance groove 33, and the upper mold 7 can provide an opening space for the L-slot 37. The clearance groove 33, the L-slot 37 and the T-slot 15 can provide placement and movement space for the connecting plate 34.

[0038] Blocking parts include: The receiving grooves 44 are symmetrically and evenly formed on the mold core 12 and the mold piece 13 and are respectively located on the side of the through hole 29 and the oblique square hole 32 away from the connecting plate 34; There are multiple plugs 46, which are arranged in the receiving groove 44 and are elastically connected to the inner wall of the receiving groove 44 respectively; The plug 46 and the oblique hole 32 have the same inclination angle and can cooperate with each other so that the oblique hole 32 fits with the plug 46 .

[0039] Specifically, the end of the plug 46 close to the hose 18 is fixedly connected to a third spring 45, and the third spring 45 is connected to the inner wall of the receiving groove 44. The mold core 12 and the mold piece 13 can provide a space for opening the receiving groove 44, and the receiving groove 44 can provide a movement and storage space for the plug 46. The oblique hole 32 can use its own inclination angle to cooperate with the external force and the inclination angle of the plug 46 to push the plug 46 to move downward and squeeze the third spring 45, so that the plug 46 can be received in the receiving groove 44, so that the I-plate 31 can cover the receiving groove 44 and provide a resistance effect for the plug 46. The oblique hole 32 can fit with the plug 46 to play a sealing role, and cooperate with the I-plate 31, the mold core 12 and the mold piece 13 to participate in the forming of the bent pipe to avoid abnormal forming of the inner wall of the bent pipe.

[0040] Triggers include: A pull rope 36, one end of which is fixedly connected to the connecting plate 34 and is located above the hose 18, and the other end of which is movable through the T-plate 16; A movable groove 38 is formed through the T-plate 16 at one end close to the capsule 23; The baffle 40 is disposed in the movable groove 38 and is elastically connected to the T-plate 16 and connected to the other end of the pull rope 36; The rubber column 41 is sequentially arranged through the lower mold 8, one end of which is located in the T-slot 15 and corresponds to the movable slot 38, and the other end is located in the capsule 23; One end of the connecting rope 43 is connected to the capsule 23 , and the other end is connected to the rubber column 41 through a connecting component.

[0041] Specifically, a second spring 39 is fixedly connected to the side of the baffle 40 close to the cannula 19, and the second spring 39 is fixedly connected to the T-plate 16. The T-plate 16 can provide a through channel for the pull rope 36, and the pull rope 36 is in a taut state. The second spring 39 can use its own elastic force to push the baffle 40, so that the baffle 40 pulls the pull rope 36 tight, so that the pull rope 36 pulls the first spring 35 through the connecting plate 34 to keep it in a stretched state, and then the connecting plate 34 drives one end of the I-plate 31 to extend out of a part of the mold 13, so that the oblique square hole 32 is aligned with the nozzle. The head 30 is aligned (in the mold opening state), the rubber column 41 is made of rubber and plays a sealing role. A pressure plate 42 is fixed to the outside of the end of the rubber column 41 away from the baffle 40. The end of the pressure plate 42 away from the rubber column 41 is fixedly connected to the other end of the connecting rope 43. The connecting rope 43 is pulled by the elasticity of the capsule 23 to keep it straight. When the capsule 23 rebounds after being squeezed, the pressure plate 42 is pulled by the connecting rope 43 to move away from the L tube 20, so that the pressure plate 42 can pull the rubber column 41 to move together and reset to the position as shown in the figure. Figure 15 In the position shown, a notch 47 is provided through one end of the T-plate 16 close to the mold piece 13. The notch 47 can provide a penetration and movement space for the connecting plate 34. Slots 48 are symmetrically provided on the outer sides of the mold piece 13 and the mold core 12. The slots 48 can cooperate with the I-plate 31 so that the I-plate 31 can be plugged into the mold piece 13 and the mold core 12.

[0042] In actual application of this embodiment, during the closing process of the upper mold 7 and the lower mold 8, the capsule 23 will be gradually squeezed and deformed by the support plate 25 and the pressure roller 26 to push the release agent, and gradually approach the pressure plate 42 during the deformation process. At the same time, the connecting rope 43 will bend and fold. During the complete closing process of the upper mold 7 and the lower mold 8, the capsule 23 will contact the pressure plate 42 under the pressure of the pressure roller 26, and squeeze the pressure plate 42, so that the pressure plate 42 pushes the glue column 41 to move close to the movable groove 38 under the action of external force, and then the glue column 41 can squeeze the baffle 40 under the action of external force, and squeeze the second spring 39 through the baffle 40 to shrink and deform, so that the baffle 40 moves along the movable groove 38 in the direction close to the mold piece 13, thereby relaxing the straightened pull rope 36, so that the first spring 35 The cam 34 is pressed against the mold 13 and the cam 36 is pressed against the mold 13. The cam 34 is pressed against the mold 13 and the cam 36 is pressed against the mold 13. The cam 34 is pressed against the mold 13 and the cam 36 is pressed against the mold 13. The cam 31 is pressed against the mold 13 and the cam 36 is pressed against the mold 13.

[0043] After that, the staff needs to start the injection mechanism 11 to inject the molten metal into the mold cavity 9, so that the molten metal is cooled and formed into a bent pipe under the cooperation of the mold cavity 9, the mold piece 13, the mold core 12, the I-plate 31 and the plug 46.

[0044] As a preferred embodiment of the present invention, a method for using a pipe bending pressure casting device includes: First, the hydraulic rod 4 is controlled to extend, driving the upper mold 7 and the lower mold 8 to pre-close the mold. The upper mold 7 drives the support plate 25 and the pressure roller 26 to insert into the groove 22 of the lower mold 8, squeezing the capsule 23 to shrink and deform. Then, the hydraulic rod 4 is controlled to retract to separate the upper mold 7 and the lower mold 8. The support plate 25 and the pressure roller 26 withdraw from the groove 22 to elastically reset the capsule 23, and the release agent is sucked from the external pipeline through the one-way valve 24 for storage; Then, the hydraulic rod 4 is controlled to extend again, driving the upper mold 7 and the lower mold 8 to completely close the mold. The support plate 25 and the pressure roller 26 squeeze the capsule 23 for the second time, so that the mold release agent inside is pressed into the L-tube 20 through the second one-way valve 49. The mold release agent flows through the cannula 19, the hose 18, and the branch pipe 27 in sequence, and is finally sprayed into the mold cavity 9 through the nozzle 30 in the form of atomization. During the mold closing process, the capsule 23 is pressed against the pressure plate 42 and the rubber column 41. The rubber column 41 squeezes the baffle 40, compressing the second spring 39, relaxing the pull rope 36, and contracting the first spring 35, pulling the connecting plate 34 and the I-shaped plate 31 toward the mold piece 13. The oblique square hole 32 of the I-shaped plate 31 is aligned with the receiving groove 44. The plug 46 pops out under the action of the third spring 45, blocking the oblique square hole 32. Then, the injection mechanism 11 is started to inject the molten metal into the mold cavity 9 through the injection hole 10. The molten metal cooperates with the mold core 12, the mold piece 13, the I-shaped plate 31 and the plug 46 in the mold cavity 9 and cools to form a hollow elbow. Finally, the hydraulic rod 4 is controlled to retract, the upper mold 7 and the lower mold 8 are separated, and the formed elbow and the internal mold core 12, mold piece 13, and I-plate 31 are vertically extracted upwards. The insertion tube 19 is pulled out and the chain 17 is pulled out. Multiple mold pieces 13 and mold cores 12 are taken out from the elbow in turn, and the chain 17 is re-inserted in turn for assembly. The assembled mold core 12 and mold piece 13 are inserted into the T-slot 15 of the lower mold 8 through the T-plate 16 to reset.

[0045] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pipe bending pressure casting device, comprising a machine base and a hydraulic rod fixed above the machine base, wherein the telescopic end of the hydraulic rod is connected to an upper die, a lower die is plugged into the machine base, and the lower die is located below the upper die, a die cavity is defined between the mating surfaces of the upper and lower dies, an injection mechanism is connected to the front face of the lower die, and the output end of the injection mechanism is connected to the die cavity, characterized in that: Also includes: The casting core is inserted into the mold cavity on the lower mold to cast the hollow elbow and facilitate mold removal; It includes a mold core inserted in a mold cavity, and a plurality of mold pieces evenly divided by the bent mold core, wherein the mold core and the plurality of mold pieces are connected and assembled into a curved tube shape through a connector; The spraying unit is provided on the mold surface between the upper and lower molds and is located within the casting core portion to spray a release agent into the mold cavity when the mold is closed. The spraying unit includes a capsule embedded in the lower mold and a support plate fixed below the upper mold. The support plate corresponds to the position of the capsule to squeeze the capsule. The spraying unit also includes a hose and a branch pipe provided through the connector, and a through hole and a spray head provided through the mold sheet and the mold core. The self-closing part is symmetrically inserted on the mold core and the mold piece, and is connected to the spray part to close the through hole after spraying the release agent; it includes an I-shaped plate symmetrically inserted on the mold core and the mold piece, and a plurality of oblique square holes evenly opened through the I-shaped plate, and the oblique square holes correspond to the positions of the through holes, and the I-shaped plate is connected to the capsule through a trigger member.

2. The elbow pressure casting device according to claim 1, characterized in that: The core casting part includes a core piece and a connecting piece. The core piece is arranged in the mold cavity, and the connecting piece is plugged into the core piece to position the core piece. The core piece includes: T-slots are provided on the lower die and are located at both ends of the die cavity; There are multiple T-plates, one of which is fixed to the rear end of the mold core and the other is fixed to the end of the mold piece away from the mold core; The T-plate is plugged into the T-slot; Insert holes are provided in the mold core and the mold piece.

3. The elbow pressure casting device according to claim 2, characterized in that: The connecting piece includes: A chain is inserted into the socket; A hose is provided through the chain and is closed at one end; The cannula is connected to the other end of the hose and passes through the T-plate.

4. The elbow pressure casting device according to claim 3, characterized in that: The spray part includes a pressure storage part and a spray discharge part. The pressure storage part is arranged on the upper mold and the lower mold. The spray discharge part is connected to the hose and passes through the mold core and the mold piece. The pressure storage part includes: The groove is symmetrically opened on the lower die; The capsule is arranged in the groove, and one side is fixedly connected to the lower mold; A one-way valve is symmetrically arranged on the front of the lower mold and extends into the groove to communicate with the capsule; The lower end of the support plate is rotatably connected to a pressing roller corresponding to the position of the groove so as to squeeze the capsule.

5. The elbow pressure casting device according to claim 4, characterized in that: The spray discharge part includes: The L-tube is symmetrically fixed in the lower die, with one end connected to the T-slot; a second one-way valve connected to the other end of the L-tube, extending to the groove and communicating with the capsule; There are multiple rubber rings, which are fixed on the inner side of the L-tube and the outer side of the cannula respectively; The lower end of the cannula is inserted into the inner side of the upper end of the L-tube to form a seal with the rubber ring; Through-jet parts, through-chain, core and die settings.

6. The elbow pressure casting device according to claim 5, characterized in that: The spray parts include: There are multiple branch pipes that pass through the chain and are evenly arranged, corresponding to the positions of the through holes and connected to the hoses; The sealing gasket is fixed to the end of the branch pipe away from the hose, corresponds to the position of the through hole, and fits with the mold core and the mold piece; There are multiple nozzles embedded in the mold core and the mold piece, corresponding to the positions of the through holes respectively.

7. The elbow pressure casting device according to claim 6, characterized in that: The self-closing part includes a trigger and a blocking part, wherein the blocking part is connected to the trigger and elastically connected to the mold core and the mold piece, and the blocking part includes: The I-shaped plate has a curvature that matches the contours of the mold core and the mold piece; a connecting plate connected between the I-shaped plates and located away from the mold core, in the direction of one end of one of the mold pieces; The connecting plate is elastically connected to the mold piece; The clearance groove is symmetrically opened on the lower die, connected with the T-slot and the die cavity, and is located on the outside of the connecting plate; The L-groove is symmetrically opened on the upper die and communicates with the die cavity, and is located on the outside of the connecting plate; The plugging parts are embedded and elastically arranged in the mold core and the mold piece, and are symmetrically arranged and staggered with the oblique square holes.

8. The elbow pressure casting device according to claim 7, characterized in that: The blocking parts include: The receiving grooves are symmetrically and evenly arranged on the mold core and the mold piece, and are respectively located on the side of the through hole and the oblique square hole away from the connecting plate; There are multiple plugs, which are arranged in the receiving groove and are elastically connected to the inner wall of the receiving groove respectively; The plug and the oblique square hole have the same inclination angle and can cooperate with each other so that the oblique square hole fits the plug.

9. The elbow pressure casting device according to claim 8, characterized in that: The triggering member includes: A pull rope, one end of which is fixedly connected to the connecting plate and located above the hose, and the other end of which is movable and passes through the T-plate; A movable groove is provided through the T-plate at one end close to the capsule; a baffle, which is disposed in the movable groove and elastically connected to the T-plate and to the other end of the drawstring; The glue column is sequentially arranged through the lower mold, one end of which is located in the T-slot and corresponds to the movable slot, and the other end is located in the capsule; The connecting rope has one end connected to the capsule and the other end connected to the rubber column through a connecting component.

10. A method for using a pipe bending pressure casting device, applied to the pipe bending pressure casting device according to any one of claims 1 to 9, characterized in that: include: The hydraulic rod is controlled to extend, driving the upper and lower molds to pre-close. The upper mold drives the support plate and the pressure roller to insert into the groove of the lower mold, squeezing the capsule to shrink and deform. Then the hydraulic rod is controlled to retract to separate the upper and lower molds. The support plate and the pressure roller exit the groove to elastically reset the capsule, and the release agent is sucked from the external pipeline through the one-way valve for storage; Then the hydraulic rod is controlled to extend again, driving the upper and lower molds to completely close the mold. The support plate and the pressure roller squeeze the capsule for the second time, so that the mold release agent inside is pressed into the L-tube through the second one-way valve. The mold release agent flows through the cannula, the hose, and the branch pipe in sequence, and is finally sprayed into the mold cavity through the nozzle. During the mold closing process, the capsule is pressed to push the pressure plate and the rubber column, and the rubber column squeezes the baffle, compressing the second spring, relaxing the pull rope, and contracting the first spring, pulling the connecting plate and the I-shaped plate toward the mold. The oblique square hole of the I-shaped plate is aligned with the receiving slot, and the plug pops out under the action of the third spring to seal the oblique square hole; Then the injection mechanism is started to inject the molten metal into the mold cavity through the injection hole. The molten metal cooperates with the mold core, mold piece, I-plate and plug in the mold cavity and cools to form a hollow elbow. Finally, the hydraulic rod is controlled to retract, the upper mold and the lower mold are separated, and the formed elbow and the internal mold core, mold piece, and I-plate are extracted vertically upward. The insert tube and the chain are pulled out, and multiple mold pieces and mold cores are taken out from the elbow in turn. The chain is reinserted in order for assembly, and the assembled mold core and mold piece are inserted into the T-slot of the lower mold through the T-plate to reset.

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