A kind of exhaust type mold and using method thereof

Abstract

The present invention relates to the technical field of shoe sole molds, and specifically to an exhaust type mold and a method for using the same, comprising an upper mold and a lower mold, wherein a mold cavity is formed between the upper mold and the lower mold, wherein a plurality of exhaust holes connected to the mold cavity are provided at the top of the upper mold, a plurality of through holes penetrating into the mold cavity are provided at the lower end of the lower mold, and a plurality of mounting holes coaxial with the through holes are provided on the bottom wall of the lower mold; the present invention provides different amounts of molten liquid to sliding holes and casting tubes through a plurality of extruders, that is, casting tubes at different positions supply molten liquid to the mold cavity at different rates, and then control the rotation speeds of different exhaust power motors to be different, so that the exhaust holes at different positions extract the molten liquid in the mold cavity at different rates, and then control the flow state of the molten liquid in the mold cavity, and the molten liquid in different flow states will continuously enter the area where air exists, and wrap the air to form bubbles, and then the air in the mold cavity can be discharged with the flow of the molten liquid.

Description

Technical Field

[0001] The invention relates to the technical field of sole moulds, in particular to an exhaust type mould and a use method thereof. Background Art

[0002] Daily life requires the support of the body's weight by the feet, especially for actions related to standing and walking. The aforementioned actions all require the feet to bear the weight of the body. Today, people are accustomed to wearing shoes when going out, whether simply going out, engaging in outdoor activities or even doing intense exercise. Shoes not only protect, but also provide stable movement and stepping, reduce the reaction force of various postures and even exercises on the feet, and overcome discomfort and pain. The sole of the shoe is often in contact with the ground, subjected to friction, and bears the reaction from the body's weight and from ground activities. At the same time, in order to further increase the comfort of people wearing shoes, the sole will be designed to suit the shape of the foot, and other materials with high softness will be placed in the position with high force to further increase comfort.

[0003] When manufacturing the sole, plastic or rubber material in a molten state is injected into a mold, and then the molten liquid is solidified and formed by a cooling device in the mold. However, when manufacturing a sole with a complex structure, in order to reduce the difficulty of mold manufacturing, the upper and lower molds of the sole mold are distributed along the thickness direction of the sole. In addition, because the top of the sole is designed to adapt to the shape of the human foot, its top is generally wavy along the length direction of the foot. As a result, when the molten liquid is injected, the molten liquid level rises and forms a number of closed cavities in the top of the sole mold cavity, which makes it impossible to exhaust the air in the cavity, affecting the molding quality.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention aims to provide a venting type mold and a method of using the same.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: a venting type mold and a method of using the same, comprising an upper mold and a lower mold, and a cooling system arranged in the upper mold and the lower mold, and a mold cavity is formed between the upper mold and the lower mold, the top of the upper mold is provided with a plurality of discharge holes connected to the mold cavity, the lower end of the lower mold is provided with a plurality of through holes penetrating into the mold cavity, the bottom wall of the lower mold is provided with a plurality of mounting holes coaxial with the through holes, a casting tube that penetrates into the mold cavity and injects molten liquid into the mold cavity is provided in the through holes, and the casting tube is provided with an opening connected to the mold cavity on its end face, a side casting hole is provided on the side wall of the casting tube, a control device for driving the casting tube to move up and down is provided in the mounting hole, and the casting tube is connected to the extruder, and the discharge hole extracts the air or molten liquid in the mold cavity through the extraction device.

[0007] By adopting the above technical scheme, the control device is used to drive the casting tube to move up and down, and then the molten liquid in the mold cavity is continuously extracted through the discharge hole after the molten liquid is injected, and the casting tube continues to inject the molten liquid into the mold cavity, and then the molten liquid is made to flow in the mold cavity. The extraction device is used to extract the extraction amount of the discharge holes at different positions, and the extruder introduces different amounts of molten liquid into the casting tubes at different positions, thereby forming different flow states in the mold cavity. The flowing molten liquid can also be used to take away the air retained under the complex structure of the top wall of the mold cavity, thereby increasing the effect of removing air from the mold, and thereby increasing the molding quality of the sole.

[0008] The present invention is further configured as follows: the control device includes a connecting column arranged in the mounting hole, a sliding hole penetrating therein is provided in the connecting column, and an annular heat insulation groove arranged around the sliding hole is provided at one end of the connecting column away from the lower mold, the casting tube is slidably connected to the inner wall of the sliding hole, the side wall of the sliding hole is penetrated by a sliding groove connected to the heat insulation groove, the side wall of the casting tube is fixedly connected to a connecting block passing through the sliding groove and entering the heat insulation groove, a fixed block is fixedly connected to the opening of the heat insulation groove, a control motor is fixedly connected to the fixed block, the control motor output shaft is fixedly connected to a control threaded column rotatably connected to the inner wall of the heat insulation groove, and the control threaded column is threadedly connected to the connecting block.

[0009] By adopting the above technical solution, the control motor is started, the control motor drives the shape of the control thread column, the control thread column drives the connecting block to move up and down, and the connecting block drives the casting pipe to move up and down, thereby completing the change of the depth of the casting pipe in the mold cavity. The structure in which the casting pipe moves in the sliding hole can ensure that the molten liquid in the extruder can enter the sliding hole and then enter the mold cavity through the casting pipe. The control accuracy of the moving distance of the casting pipe is increased by controlling the structure of the threaded connection between the thread column and the connecting block.

[0010] The present invention is further configured as follows: the extraction device includes a discharge tube, one end face of the discharge tube is fixedly connected to a discharge power motor, a discharge threaded shaft extending to the inner cavity of the discharge tube is fixedly connected to the output shaft of the discharge power motor, and an opening is provided at one end of the discharge tube away from the discharge power motor, a connecting hole is provided on the side wall of the discharge tube close to the discharge power motor, and the connecting hole is connected to the discharge hole through a pipe.

[0011] By adopting the above technical solution, the discharge power motor is started, and the discharge power motor drives the discharge thread shaft to rotate. The discharge thread shaft rotates in the discharge barrel. By utilizing the structure in which the discharge thread shaft abuts against the inner wall of the discharge barrel, when the discharge thread shaft rotates, the gas in the discharge barrel can flow out along the opening of the discharge barrel away from the discharge power motor, thereby making the communicating hole present a negative pressure state relative to the mold cavity, thereby making the molten liquid in the mold cavity flow out, and at the same time, the molten liquid entering the discharge barrel is passed into the extruder again.

[0012] The present invention is further configured as follows: a plurality of the casting pipes are arranged in the middle of the length direction of the mold cavity and are arranged in an arranged manner, and the discharge holes are arranged around the edge of the mold cavity and surround the casting pipes in horizontal plane projection.

[0013] By adopting the above technical scheme and utilizing the position setting of the pouring tube and the discharge hole, the molten liquid flows into the mold cavity from the pouring tube at the middle position. When the mold cavity is filled with the molten liquid, the molten liquid continues to be injected into the mold cavity, and the excess molten liquid flows from the middle position of the mold cavity to the surrounding areas, wherein the discharge holes at the surrounding areas of the mold cavity discharge the molten liquid, thereby forming a continuous flow of molten liquid in the mold cavity.

[0014] The present invention is further configured as follows: a plurality of locking blocks are fixedly connected to the side walls of the connecting column, a locking hole is penetrated through the locking block, a plurality of locking screw holes are opened on the bottom wall of the lower mold, and screws pass through the locking holes and are threadedly connected to the locking screw holes.

[0015] By adopting the above technical scheme, the connecting column and the lower mold are connected as a whole by using a structure in which a screw passes through the locking hole and is threadedly connected to the locking screw hole. When the casting pipe is blocked or needs to be replaced, the single connecting column can be further disassembled and repaired. At the same time, the connecting column and the casting pipe are made of stainless steel, and its thermal conductivity is smaller than that of the lower mold and the upper mold. Therefore, when the cooling system in the upper mold and the lower mold absorbs the heat of the molten liquid in the mold cavity and performs molding, the heat transferred from the casting pipe to the lower mold can be reduced. After the molten liquid is cooled once, it can be ensured that the temperature of the casting pipe does not drop too low. When the subsequent molten liquid is injected therein, it will not directly cause condensation due to the excessively low temperature of the casting pipe and the connecting column, thereby increasing the injection effect.

[0016] The present invention is further configured as follows: a sealing groove is provided on an end surface of the connecting column close to the lower mold, and a sealing ring abutting against the inner wall of the mounting hole is clamped in the sealing groove.

[0017] By adopting the above technical solution, when the connecting column is pressed into the mounting hole by means of a screw, a sealing ring is arranged between the connecting column and the bottom wall of the mounting hole to further increase the sealing effect between the casting tube and the mounting hole, thereby increasing the molding effect of the sole.

[0018] The present invention is further configured as follows: a plurality of annular piston ring grooves are provided on the outer peripheral wall of the casting pipe, and piston rings are arranged in the piston ring grooves.

[0019] By adopting the above technical solution, utilizing the piston ring groove structure on the outer wall of the casting tube and installing a piston ring in the piston ring groove, the dynamic sealing effect between the casting tube and the inner wall of the sliding hole is further increased, preventing the molten liquid from passing through the gap between the casting tube and the sliding hole and entering the insulation groove through the sliding groove, thereby increasing the use effect.

[0020] The present invention is further configured as follows: S1, firstly, the upper mold and the lower mold are pressed and connected, and the discharge hole is connected with the connecting hole on the discharge cylinder, and the sliding hole is connected with the outlet of the extruder; S2, the extruder extrude the molten liquid into the mold cavity through the sliding hole and the casting tube, wherein the extrusion amount of several casting tubes located in the middle position of the mold cavity is greater than the extrusion amount of the casting tubes located at the edge position of the mold cavity; S3, after a certain amount of molten liquid is injected into the mold cavity, the casting tube below the position where there is air on the top wall of the mold cavity is extended into the mold cavity, and at the same time, the extrusion speed of the casting tube at this position into which the molten liquid is injected is increased, and the extrusion speed of the casting tubes at other positions is correspondingly reduced, and then the extrusion speed of the casting tubes at positions away from the casting tubes is increased. S4, sequentially make the casting tubes at different positions penetrate into the mold cavity and adjust the rates of extrusion and extraction of the molten liquid of each casting tube and the mold cavity, so that the molten liquid in the mold cavity presents different flow states and brings out the air in the mold cavity; S5, retract all the casting tubes to the position closest to the connecting column, and at the same time close the channels of the connecting column and the discharge hole, and then use the cooling system in the upper mold and the lower mold to absorb the heat of the molten liquid in the mold cavity and shape it, and at the same time use the stainless steel casting tube and connecting column to reduce the heat transfer efficiency between the casting tube and the mold cavity, and then use the annular insulation groove to further reduce the heat transfer efficiency between the molten liquid in the sliding hole and the lower mold.

[0021] By adopting the above technical scheme, the setting of the pouring tubes at different positions penetrating into the mold cavity to different depths is adjusted, and then when the molten liquid is injected into the mold cavity, the flow state of the molten liquid in the mold cavity is controlled by controlling the pouring tubes to be injected into the mold cavity at different positions, that is, the vertical flow is converted into the horizontal flow, and the air retained on the complex inner wall of the mold cavity is driven to the discharge hole through various liquid flows, and then the air is discharged through the discharge hole, thereby increasing the molding effect.

[0022] In summary, the present invention has the following beneficial effects:

[0023] Several extruders are used to provide different amounts of molten liquid to the sliding holes and casting tubes, that is, casting tubes at different positions supply molten liquid to the mold cavity at different rates, and then different discharge power motors are controlled to rotate at different speeds, so that discharge holes at different positions extract the molten liquid in the mold cavity at different rates, thereby controlling the flow state of the molten liquid in the mold cavity. The molten liquid in different flow states will continuously enter the area where air exists, and wrap the air to form bubbles, and then the air in the mold cavity can be discharged with the flow of the molten liquid.

[0024] By utilizing the setting that the casting tube can change its depth in the mold cavity, the molten liquid can flow at different positions in the mold cavity, and the molten liquid in the mold cavity can flow in its thickness direction, further increasing the effect of air discharge in the mold cavity.

[0025] The discharge power motor is used to drive the discharge threaded shaft to rotate and provide negative pressure to the discharge hole through the connecting hole, so that the molten liquid in the mold cavity can flow out from the discharge hole at the edge position. At the same time, the molten liquid flowing out can be transported to the extruder through the opening of the discharge cylinder to complete the recovery and prevent the waste of the molten liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the cooperation between the upper die and the lower die in the present invention;

[0027] Figure 2 It is a structural schematic diagram of the lower mold in the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the lower mold in another direction of the present invention;

[0029] Figure 4 is a cross-sectional schematic diagram of a connecting column in the present invention;

[0030] Figure 5 It is a structural schematic diagram of the upper mold in the present invention;

[0031] Figure 6 It is a cross-sectional schematic diagram of the cooperation between the upper die and the lower die of the present invention;

[0032] Figure 7 is a cross-sectional schematic diagram of the extraction device in the present invention;

[0033] Figure 8 It is a schematic diagram of the flow state of the molten liquid in the mold cavity under one state in the present invention;

[0034] Fig. 9 For the present invention Figure 4 A local enlarged schematic diagram of point A in the middle.

[0035] In the figure:

[0036] 11. Upper mold; 12. Lower mold; 13. Mold cavity; 14. Through hole; 15. Mounting hole; 16. Locking screw hole; 17. Connecting column; 18. Casting pipe; 19. Sliding hole; 20. Locking block; 21. Locking hole; 22. Sliding groove; 23. Connecting block; 24. Fixed block; 25. Control threaded column; 26. Control motor; 27. Side casting hole; 28. Piston ring groove; 29. ​​Sealing groove; 30. Sealing ring; 31. Discharge hole; 32. Circulation hole; 33. Discharge cylinder; 34. Discharge threaded shaft; 35. Discharge power motor; 36. Connecting hole; 37. Heat insulation groove. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention. Example

[0038] The exhaust type mold and the use method thereof, such as Figures 1 to 9 As shown, it includes an upper mold 11 and a lower mold 12, and a cooling system arranged in the upper mold 11 and the lower mold 12, and a mold cavity 13 is formed between the upper mold 11 and the lower mold 12, a plurality of discharge holes 31 connected to the mold cavity 13 are opened at the top of the upper mold 11, a plurality of through holes 14 penetrating into the mold cavity 13 are opened at the lower end of the lower mold 12, a plurality of mounting holes 15 coaxial with the through holes 14 are opened on the bottom wall of the lower mold 12, a casting tube 18 penetrating into the mold cavity 13 and injecting molten liquid into the mold cavity 13 is arranged in the through hole 14, and the casting tube 18 is provided with an opening connected to the mold cavity 13 on its end face, and a side casting hole 27 is opened on the side wall of the casting tube 18, a control device for driving the casting tube 18 to move up and down is arranged in the mounting hole 15, and the casting tube 18 is connected to the extruder, and the discharge hole 31 is pulled out by the extraction device The air or molten liquid in the mold cavity 13 is extracted, and the control device includes a connecting column 17 arranged in the mounting hole 15, and a sliding hole 19 is provided in the connecting column 17, and an annular heat insulation groove 37 arranged around the sliding hole 19 is provided at the end of the connecting column 17 away from the lower mold 12, and the casting tube 18 is slidably connected to the inner wall of the sliding hole 19, and the side wall of the sliding hole 19 is penetrated by a sliding groove 22 connected to the heat insulation groove 37, and the side wall of the casting tube 18 is fixedly connected to a connecting block 23 that passes through the sliding groove 22 and enters into the heat insulation groove 37, and a fixed block 24 is fixedly connected to the opening of the heat insulation groove 37, and a control motor 26 is fixedly connected to the fixed block 24, and the output shaft of the control motor 26 is fixedly connected to a control threaded column 25 that is rotatably connected to the inner wall of the heat insulation groove 37, and the control threaded column 25 is threadedly connected to the connecting block 23.

[0039] like Figure 1 and Figure 7As shown, the extraction device includes a discharge cylinder 33, one end face of which is fixedly connected to a discharge power motor 35, a discharge threaded shaft 34 extending to the inner cavity of the discharge cylinder 33 is fixedly connected to the output shaft of the discharge power motor 35, and an opening is provided at one end of the discharge cylinder 33 away from the discharge power motor 35, a connecting hole 36 is provided on the side wall of the discharge cylinder 33 near the discharge power motor 35, and the connecting hole 36 is connected to the discharge hole 31 through a pipeline.

[0040] like Figure 1 and Figure 6 As shown, a plurality of pouring tubes 18 are arranged in the middle of the length direction of the mold cavity 13 and are arranged in an arranged manner. The discharge holes 31 are arranged around the edge of the mold cavity 13 and surround the pouring tubes 18 in horizontal plane projection.

[0041] like Figure 3 , Figure 4 and Figure 6 As shown, a plurality of locking blocks 20 are fixedly connected to the side wall of the connecting column 17, and a locking hole 21 is penetrated through the locking block 20. A plurality of locking screw holes 16 are opened on the bottom wall of the lower mold 12, and screws pass through the locking holes 21 and are threadedly connected to the locking screw holes 16.

[0042] like Figure 3 , Figure 4 and Fig. 9 As shown, a sealing groove 29 is formed on one end face of the connecting column 17 close to the lower mold 12, and a sealing ring 30 is clamped in the sealing groove 29 and abuts against the inner wall of the mounting hole 15. A plurality of annular piston ring grooves 28 are formed on the outer peripheral wall of the casting tube 18, and piston rings are arranged in the piston ring grooves 28.

[0043] like Figures 1 to 9As shown, S1, first press and connect the upper mold 11 and the lower mold 12, and connect the discharge hole 31 with the connecting hole 36 on the discharge cylinder 33, and connect the sliding hole 19 with the extruder outlet; S2, the extruder extrude the molten liquid into the mold cavity 13 through the sliding hole 19 and the casting tube 18, wherein the extrusion amount of several casting tubes 18 located in the middle position of the mold cavity 13 is greater than the extrusion amount of the casting tubes 18 located at the edge position of the mold cavity 13; S3, after a certain amount of molten liquid is injected into the mold cavity 13, the casting tube 18 below the air position on the top wall of the mold cavity 13 is extended into the mold cavity 13, and at the same time, the extrusion speed of the casting tube 18 at this position into which the molten liquid is injected is increased, and the extrusion speed of the casting tubes 18 at other positions is correspondingly reduced, and then the discharge hole at the position away from the casting tube 18 is increased. 31, extracting the molten liquid at a speed of extracting the molten liquid; S4, sequentially making the casting tubes 18 at different positions penetrate into the mold cavity 13 and adjusting the rates of extruding and extracting the molten liquid of each casting tube 18 and the mold cavity 13, so that the molten liquid in the mold cavity 13 presents different flow states and brings out the air in the mold cavity 13; S5, retracting all the casting tubes 18 to the position closest to the connecting column 17, and at the same time closing the passage of the connecting column 17 and the discharge hole 31, and then utilizing the cooling system in the upper mold 11 and the lower mold 12 to absorb the heat of the molten liquid in the mold cavity 13 and shape it, and at the same time utilizing the stainless steel casting tubes 18 and connecting columns 17 to reduce the heat transfer efficiency between the casting tubes 18 and the mold cavity 13, and then utilizing the annular heat insulation groove 37 to further reduce the heat transfer efficiency between the molten liquid in the sliding hole 19 and the lower mold 12.

[0044] First, according to the amount of molten liquid injected into the sole and the injection time, different sizes (diameters) and models of casting tubes 18 are selected to meet different injection times and injection speeds to meet process requirements and increase production quality. Then, the sealing ring 30 is inserted into the sealing groove 29 on the connecting column 17, and then the connecting column 17 with the casting tube 18 of a suitable size is inserted into the mounting hole 15, and the positions of the locking block 20 and the locking hole 21 on the casting tube 18 relative to the locking screw hole 16 are adjusted, and then the screw is passed through the locking block 20 and threadedly connected to the locking screw hole 16, and the sealing ring 30 is squeezed by the connecting column 17 and the inner wall of the mounting hole 15 to complete the sealing and prevent the molten liquid from leaking from the through hole 14 and the mounting hole 15, thereby increasing the injection mold. The control effect of the molten liquid in the cavity 13 is improved, thereby increasing the product quality, and then the upper mold 11 and the lower mold 12 are installed on the lifting platform, wherein the lower mold 12 is installed and fixed on the lifting platform, and the upper mold 11 is installed on the moving block that moves up and down on the lifting platform, and the moving block is used to drive the upper mold 11 to move up and down to complete the mold closing and mold separation of the upper mold 11 and the lower mold 12, and then the discharge hole 31 on the lower mold 12 is connected with the connecting hole 36 on the discharge tube 33 through a pipeline, each discharge hole 31 or a group of discharge holes 31 corresponds to a discharge tube 33, wherein the opening on the discharge tube 33 is connected with the feed port of the extruder, and the discharge port of the extruder is connected with the sliding hole 19 on the connecting column 17, and the discharge tube 33 is arranged on the extruder;

[0045] By using the above-mentioned installation structure, the raw materials for preparing the soles, such as plastic particles or rubber particles, are first heated and mixed by an extruder to form a molten liquid, and then the molten liquid is transferred to the sliding hole 19 by the extruder, and the molten liquid is then injected into the mold cavity 13 through the casting pipe 18. While injecting the molten liquid, the discharge power motor 35 is started and drives the discharge threaded shaft 34 to rotate. By using the structure of the discharge threaded shaft 34 and the inner cavity of the discharge tube 33, when the discharge threaded shaft 34 rotates, the air in the discharge tube 33 is discharged to the opening of the discharge tube 33, and a pressure environment with a negative pressure relative to the mold cavity 13 is formed at the connecting hole 36, so that the air in the mold cavity 13 is discharged into the discharge tube 33. When the molten liquid in the mold cavity 13 is "filled" (at this time, the mold cavity 13 retains part of the air due to the complex inner wall structure of the mold cavity 13, especially when the molten liquid is injected at a fast speed), the molten liquid continues to be injected into the mold cavity 13, and at the same time, the excess molten liquid is discharged from the discharge hole 31 to the connecting hole 36. The inner cavity of the discharge tube 33 flows, so that the molten liquid in the mold cavity 13 is in a flowing state, thereby discharging air. When the molten liquid continues to be injected into the mold cavity 13, the control motor 26 is started, and the control motor 26 drives the control threaded column 25 to rotate, and the control threaded column 25 drives the connecting block 23 to move up and down, and the connecting block 23 drives the casting tube 18 to move up and down, so that the opening of the casting tube 18 can be at different heights in the mold cavity 13. At this time, the injection rate of the molten liquid into the casting tube 18 deep into the mold cavity 13 is greater than the injection rate of the molten liquid into the casting tube 18 not deep into the mold cavity 13, that is, the opening of the casting tube 18 at this position is the starting point of the molten liquid flow, and then by controlling the rotation speed of the discharge power motor 35 at different positions, the relative negative pressure value at the discharge hole 31 at different positions can be controlled, that is, the rate of extracting the molten liquid, and then the molten liquid flow is formed between the opening of the casting tube 18 at this position and the discharge hole 31 connected to the discharge power motor 35 with a fast rotation speed, that is, Figure 8 The molten liquid flow state shown is a schematic diagram of one of the flow states in practice. By controlling the injection rate of the pouring tube 18 at different positions, the depth of the pouring tube 18 at different positions into the mold cavity 13, and the rotation depth of the different discharge power motors 35, the flow states of the different molten liquids in the mold cavity 13 are adjusted, and the molten liquid in the flowing state is used to push the air to the position of the discharge hole 31 (or the flowing molten liquid is used to disperse the large group of gas and wrap it to form small bubbles, and then discharge it), further adapting to the different structures of the mold cavity 13, promoting the air discharge efficiency, and increasing the product quality. The side wall of the opening of the pouring tube 18 is also provided with a side pouring hole 27. The molten liquid sprayed from the opening of the pouring tube 18 is vertically upward and the molten liquid is sprayed to the top wall of the mold cavity 13 as much as possible, entraining the residual gas, and the lateral side pouring hole 27 forms a flow state on the horizontal plane to increase the exhaust effect;

[0046] The side wall of the casting tube 18 is provided with a plurality of piston ring grooves 28, in which piston rings are installed. The piston ring structure enables the casting tube 18 to slide relative to the inner wall of the sliding hole 19, while preventing the molten liquid from leaking from the gap between the casting tube 18 and the sliding hole 19 into the sliding groove 22 and the insulation groove 37. The connecting column 17 made of stainless steel can reduce the efficiency of absorbing the temperature of the inner wall of the sliding hole 19 when the upper mold 11 and the lower mold 12 are cooled, ensuring that the subsequent injection of the molten liquid will not get stuck, thereby increasing the use effect. The insulation groove 37 can further reduce heat exchange, thereby further increasing the use effect.

[0047] After the air in the mold cavity 13 is discharged, the cooling system is used to absorb the heat of the molten liquid in the mold cavity 13 and condense it into shape to complete the preparation. The cooling system is a plurality of channels running through the upper mold 11 and the lower mold 12, and cooling boxes, water pumps, refrigerators and other devices and equipment connected to the channels for cooling the mold. The medium used for absorbing heat is preferably water with a large specific heat capacity.

[0048] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A venting mold, comprising an upper mold (11) and a lower mold (12), and a cooling system disposed in the upper mold (11) and the lower mold (12), and forming a mold cavity (13) between the upper mold (11) and the lower mold (12), characterized in that: The top of the upper mold (11) is provided with a plurality of discharge holes (31) connected to the mold cavity (13); the lower end of the lower mold (12) is provided with a plurality of through holes (14) penetrating into the mold cavity (13); the bottom wall of the lower mold (12) is provided with a plurality of mounting holes (15) coaxial with the through holes (14); a casting tube (18) is provided in the through holes (14) for penetrating into the mold cavity (13) and injecting molten liquid into the mold cavity (13); the casting tube (18) is provided with an opening connected to the mold cavity (13) on its end surface; a side casting hole (27) is provided on the side wall of the casting tube (18); a control device for driving the casting tube (18) to move up and down is provided in the mounting hole (15); the casting tube (18) is connected to an extruder; the discharge hole (31) extracts air or molten liquid in the mold cavity (13) through an extraction device.

2. A venting mold according to claim 1, characterized in that: The control device comprises a connecting column (17) arranged in the mounting hole (15), a sliding hole (19) penetrating therein is provided in the connecting column (17), and an annular heat insulation groove (37) arranged around the sliding hole (19) is provided at one end of the connecting column (17) away from the lower mold (12), the casting tube (18) is slidably connected to the inner wall of the sliding hole (19), the side wall of the sliding hole (19) is penetrated by a sliding groove (22) communicating with the heat insulation groove (37), the side wall of the casting tube (18) is fixedly connected to a connecting block (23) passing through the sliding groove (22) and entering into the heat insulation groove (37), the opening of the heat insulation groove (37) is fixedly connected to a fixing block (24), the fixing block (24) is fixedly connected to a control motor (26), the output shaft of the control motor (26) is fixedly connected to a control threaded column (25) rotatably connected to the inner wall of the heat insulation groove (37), and the control threaded column (25) is threadedly connected to the connecting block (23).

3. A venting mold according to claim 2, characterized in that: The extraction device comprises a discharge tube (33), one end surface of which is fixedly connected to a discharge power motor (35), an output shaft of which is fixedly connected to a discharge threaded shaft (34) extending into the inner cavity of the discharge tube (33), and an opening is provided at one end of the discharge tube (33) away from the discharge power motor (35), a communication hole (36) is provided at a side wall of the discharge tube (33) close to the discharge power motor (35), and the communication hole (36) is connected to the discharge hole (31) through a pipeline.

4. A venting mold according to claim 3, characterized in that: The plurality of casting pipes (18) are arranged in a distributed arrangement at the middle position in the length direction of the mold cavity (13), and the discharge holes (31) are arranged around the edge of the mold cavity (13) and surround the casting pipes (18) in horizontal plane projection.

5. A venting mold according to claim 4, characterized in that: The side wall of the connecting column (17) is fixedly connected with a plurality of locking blocks (20), and the locking blocks (20) are penetrated with locking holes (21). The bottom wall of the lower mold (12) is provided with a plurality of locking screw holes (16), and screws pass through the locking holes (21) and are threadedly connected with the locking screw holes (16).

6. A venting mold according to claim 5, characterized in that: A sealing groove (29) is formed on one end surface of the connecting column (17) close to the lower mold (12), and a sealing ring (30) abutting against the inner wall of the mounting hole (15) is clamped in the sealing groove (29).

7. A venting mold according to claim 6, characterized in that: The outer peripheral wall of the casting pipe (18) is provided with a plurality of annular piston ring grooves (28), and piston rings are arranged in the piston ring grooves (28).

8. The method for using a venting mold according to claim 7, characterized in that: The following steps are involved: S1, firstly press and connect the upper die (11) and the lower die (12), connect the discharge hole (31) with the connecting hole (36) on the discharge cylinder (33), and connect the sliding hole (19) with the outlet of the extruder; S2, the extruder extrude the molten liquid into the mold cavity (13) through the sliding hole (19) and the casting tube (18), wherein the extrusion amount of the casting tubes (18) located in the middle of the mold cavity (13) is greater than the extrusion amount of the casting tubes (18) located at the edge of the mold cavity (13); S3, after a certain amount of molten liquid is injected into the mold cavity (13), the casting tube (18) located below the air position on the top wall of the mold cavity (13) is extended into the mold cavity (13), and at the same time, the extrusion speed of the molten liquid injected into the casting tube (18) at this position is increased, and the extrusion speed of the casting tube (18) at other positions is correspondingly reduced, and then the speed of extracting the molten liquid from the discharge hole (31) at a position far from the casting tube (18) is increased; S4, sequentially allowing the pouring tubes (18) at different positions to penetrate into the mold cavity (13) and adjusting the rates at which the molten liquid is extruded and drawn out of the mold cavity (13) by each pouring tube (18) and the mold cavity (13), so that the molten liquid in the mold cavity (13) presents different flow states and the air in the mold cavity (13) is taken out; S5. All casting tubes (18) are retracted to the position closest to the connecting column (17), and the passages of the connecting column (17) and the discharge hole (31) are closed at the same time. The cooling system in the upper mold (11) and the lower mold (12) is then used to absorb the heat of the molten liquid in the mold cavity (13) and to form the mold. At the same time, the stainless steel casting tube (18) and the connecting column (17) are used to reduce the heat transfer efficiency between the casting tube (18) and the mold cavity (13). The annular heat insulation groove (37) is then used to further reduce the heat transfer efficiency between the molten liquid in the sliding hole (19) and the lower mold (12).

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