A method for die-casting a thin-walled high-air-tightness molecular tower tube

Abstract

The present application relates to a method for die-casting a thin-walled high-airtightness molecular tower tube, and belongs to the field of processing and molding technology. The method for die-casting a thin-walled high-airtightness molecular tower tube comprises a first mold body, a second mold body and a third mold body, wherein the first mold body has a first molding surface; the second mold body has a second molding surface; the third mold body has a third molding surface, the first molding surface, the second molding surface and the third molding surface form a molding cavity for molding a molecular tower tube, and the third mold body is provided with an insert and a control mechanism, and the insert passes through the third molding surface and extends into the molding cavity; wherein the outer peripheral surface of the insert is provided with a plurality of molding grooves for the reinforcement part of the molding molecular tower tube, and the control mechanism drives the insert to rotate during the process of the molding liquid being injected into the molding cavity. The method for die-casting a thin-walled high-airtightness molecular tower tube provided in the embodiment of the present application can produce thin-walled molecular tower tubes with good airtightness.

Description

Technical Field

[0001] The present application relates to the technical field of processing and forming, and in particular to a method for die-casting a thin-walled high-air-tightness molecular tower tube. Background Art

[0002] Die casting is a metal casting process mainly used to produce precision metal parts. In the die casting process, molten metal is quickly injected into the mold under high pressure, and the required parts are formed after cooling and solidification. The mold is a key component in the die casting process, which directly affects the quality and production efficiency of the die casting. The die casting mold is usually composed of two parts: the fixed mold and the movable mold. They achieve rapid filling and cooling of the molten metal through precise matching and design.

[0003] The molecular tower is a kind of equipment used for high-efficiency separation technology. The tower tubes of the molecular tower are mostly made of metal. During the operation of the molecular tower, a high vacuum degree needs to be maintained inside, and continuous heating and condensation are required. In order to maintain the high vacuum degree requirements inside the molecular tower, the tower tubes of the molecular tower need to meet high airtightness requirements. In order to meet the airtightness requirements of the molecular tower tubes, the traditional molecular tower manufacturing process produces molecular tower tubes with thicker tube walls. On the one hand, the thicker tube walls lead to a slower rate of heat dissipation to the outside during the internal condensation operation of the molecular tower, reducing the reaction efficiency inside the molecular tower; on the other hand, the thicker tube walls lead to a larger size of the molecular tower, which is difficult to use in small equipment such as indoor oxygen generators. Summary of the invention

[0004] The purpose of this application is to provide a thin-walled and highly airtight molecular tower tube die-casting method to address the above-mentioned problems, which can produce thin-walled and highly airtight molecular tower tubes, thereby improving the above-mentioned problems.

[0005] This application is achieved through the following technical solutions:

[0006] In some embodiments, the present application provides a method for die-casting a thin-walled, high-air-tightness molecular tower tube. The method for die-casting a thin-walled, high-air-tightness molecular tower tube includes a first mold body, a second mold body, and a third mold body. The first mold body has a first molding surface; the second mold body has a second molding surface; the third mold body has a third molding surface. The first molding surface, the second molding surface, and the third molding surface form a molding cavity for molding the molecular tower tube. The third mold body is provided with an insert and a control mechanism. The insert passes through the third molding surface and extends into the molding cavity. The outer peripheral surface of the insert is provided with a plurality of molding grooves for the reinforcement part of the molding molecular tower tube, and the control mechanism drives the insert to rotate during the process of injecting molding liquid into the molding cavity.

[0007] In the technical scheme of the embodiment of the present application, the third mold body is provided with an insert and a control mechanism, and the insert passes through the third molding surface and extends into the molding cavity, and the insert enables the manufactured molecular tower tube to have a cavity inside; wherein, the outer peripheral surface of the insert is provided with a plurality of molding grooves for the reinforcement part of the molding molecular tower tube, and the reinforcement part can support the molecular tower tube, so that the thin-walled molecular tower tube has a higher strength, and the control mechanism drives the insert to rotate during the process of the molding cavity being injected with molding liquid. The thin-walled high-airtightness molecular tower tube die-casting molding method provided in the present application is used for molding thin-walled molecular tower tubes. In order to make the wall of the product thinner, the spacing distance between the insert and the first molding surface and the second molding surface is shorter, and the speed at which the molding liquid fills the local molding cavity is faster. The surface of the insert is provided with a molding groove so that the process of the molding liquid flowing along the insert is not smooth, and the liquid surface of the molding liquid (that is, the front end of the flowing molding liquid) cannot push the air away in time. The air may be drawn into the molding liquid and remain between the molding groove and the molding liquid. The residual air will cause pores to appear on the inner wall of the finally molded product, and the strength of the area where the pores appear in the molecular tower is relatively high. The molecular tower may be damaged due to the difficulty in withstanding the internal negative pressure (i.e., a higher vacuum degree). In order to overcome the defect that pores are easily formed on the surface of the finished product, during the process of the molding liquid being injected into the molding cavity (i.e., the stage when the molding liquid has a higher fluidity), the insert can rotate under the drive of the control mechanism, driving the molding liquid to rotate, so that the air that may be hidden in the molding groove is taken away from the molding groove by the molding liquid, and then leaves the molding liquid under the drive of buoyancy, so that the molding liquid can be completely in contact with the inner wall of the molding cavity and the surface of the insert, thereby reducing the risk of surface defects in the die-casting molding method of the thin-walled high-air-tightness molecular tower tube provided by the present application; the molecular tower tube with a thinner wall can dissipate heat to the outside faster during the internal condensation operation, thereby improving the reaction rate inside the molecular tower, and the thinner wall of the molecular tower can reduce the space occupied by the wall of the molecular tower tube, thereby reducing the size of the molecular tower; in summary, the die-casting molding method of the thin-walled high-air-tightness molecular tower tube provided by the present application can produce a molecular tower tube with a thinner wall, which can maintain a higher vacuum degree inside, has a faster internal reaction rate, and is smaller in size.

[0008] In some embodiments, the insert has a first end face located inside the molding cavity and opposite to the third molding surface, the molding groove on the outer peripheral surface of the insert extends to the first end face, and the first molding surface is provided with a pouring port for injecting molding liquid into the molding cavity, and the pouring port is adjacent to the third molding surface.

[0009] In the technical solution of the embodiment of the present application, the insert has a first end face located on the inner side of the molding cavity and opposite to the third molding surface, and the first molding surface is provided with a pouring port adjacent to the third molding surface. The flow direction of the molding liquid injected into the molding cavity from the pouring port is from bottom to top and from the third molding surface to the first end face. In the process of the molding liquid filling the molding cavity from the third molding surface to the first end face, since the molding groove on the outer peripheral surface of the insert extends to the first end face, the molding liquid first fills the part of the groove body of the molding groove close to the third molding surface, and then pushes the air to move along the molding groove toward the first end face, and then pushes the air directly out of the molding groove. The process of the molding liquid pushing the air in the molding groove is smooth and unimpeded, thereby reducing the probability of air remaining in the molding groove, thereby reducing the probability of pores appearing in the reinforcement part of the manufactured molecular tower tube, and improving the yield rate of products manufactured by the thin-walled and high-airtightness molecular tower tube die-casting molding method provided by the present application.

[0010] In some embodiments, a projection of the third forming surface on the first forming surface completely falls into the pouring port.

[0011] In the technical solution of the embodiment of the present application, since the wall of the molecular tower tube produced is thin and the spacing between the first molding surface and the insert is small, it is difficult for a large amount of molding liquid to enter the molding cavity in a short time. The opening of the pouring port is large and is arranged around the third mold body corresponding to the position of the first molding surface, so that the molding liquid can enter the molding cavity more dispersedly, reducing the risk of the molding liquid being difficult to enter the molding in a short time and gathering at the pouring port, resulting in excessive pressure at the pouring port and damage, and also speeding up the speed of the molding liquid filling the molding cavity.

[0012] In some embodiments, the insert includes a pair of components, the outer surface of the components includes a curved surface and an opposing surface, the opposing surfaces of the two components are arranged opposite to each other, the molding groove is arranged on the curved surface of the components, the axis of rotation of the insert is located between the two components, and the spacing distance between the two components gradually increases from the third molding surface to the surface of the insert located in the molding cavity and away from the third molding surface; it also includes a pair of plug-ins, the first molding surface and the second molding surface are both provided with slots for installing the plug-ins, the plug-in extends between the pair of components, the plug-in is located at the end of the insert in the molding cavity away from the third molding surface, and there is a gap between the pair of plug-ins in the closing direction of the first mold body and the second mold body, and the projections of the pair of plug-ins on the first molding surface overlap.

[0013] In the technical solution of the embodiment of the present application, the insert includes a pair of components, so that the manufactured molecular tower tube can have two independent cavities inside to meet the use requirements. The spacing distance between the two components gradually increases from the third molding surface to the surface of the insert located in the molding cavity and away from the third molding surface, so that the connection between the two internal cavities inside the molecular tower tube is stable. At the same time, when condensation and heat dissipation are carried out in the two cavities respectively, the heat dissipated from any cavity through the outer wall is not easy to dissipate to the outer wall of the other cavity to affect the normal heat dissipation of the other cavity; the plug-in extends between the pair of components, so that the part of the molecular tower tube located between the plug-in and the component can form a thinner tube wall, which is convenient for improving the heat dissipation effect of the molecular tower. There is a gap between the pair of plug-ins, so that the part of the molecular tower tube located between the two cavities can remain connected, thereby improving the overall strength of the molecular tower; the projections of the pair of plug-ins on the first molding surface overlap, so that the thickness of the tube wall around the two cavities of the molecular tower tube is uniform, thereby reducing the probability of uneven heat dissipation due to the thinness or thickness of the tube wall in the local area of ​​the molecular tower.

[0014] In some embodiments, a slot disposed on the first mold body and the second mold body passes through the first mold body and the second mold body, the plug-in slides with the inner wall of the slot, and a pair of plug-ins are detachably connected to the first mold body and the second mold body.

[0015] In the technical solution of the embodiment of the present application, during demolding, the already formed molecular tower tube can be separated from the first molding surface and / or the second molding surface by pushing the plug-in, and then the mold can be opened, so that the adhesion area between the molecular tower tube and the first molding surface and / or the second molding surface is smaller when the mold is opened, thereby reducing the risk of the molecular tower tube being damaged by adhesion and pulling of the first molding surface and / or the second molding surface.

[0016] In some embodiments, the portion of the plug extending between a pair of components has a first surface parallel to the closing direction of the first mold body and the second mold body, and the angle at which the opposite surface of the component is parallel to the first surface is taken as the initial angle. The plug core rotates back and forth in the clockwise and counterclockwise directions under the drive of the control mechanism, and the angle of each rotation of the plug core does not exceed 5°.

[0017] In the technical solution of the embodiment of the present application, during the process of the molding liquid being injected into the molding cavity, the core insert rotates back and forth in the clockwise and counterclockwise directions. When the angle of each rotation of the core insert does not exceed 5°, the core insert will not contact the plug-in, thereby reducing the risk of damage to the core insert and the plug-in due to scratches or collisions, and extending the service life of the core insert and the plug-in. In addition, the small-angle rotation enables the core insert to rotate more times in a shorter time, thereby enhancing the driving effect of the core insert on the molding liquid.

[0018] In some embodiments, the control mechanism includes a main shaft, a driving member and two reset shafts; the main shaft is connected to the output end and the insert of the driving member, and the driving member drives the main shaft to rotate back and forth in the clockwise and counterclockwise directions; the reset shaft is connected to the third mold body through a torsion spring, and the two reset shafts are respectively arranged on both sides of the main shaft and are tightly attached to the main shaft; wherein, the reset shaft fixing sleeve is provided with a gear, and the outer peripheral surface of the main shaft is provided with teeth for meshing with the gear of the reset shaft, and the torsion spring drives the reset shaft to rotate to drive the rotated main shaft to rotate back to the initial angle.

[0019] In the technical solution of the embodiment of the present application, the driving member drives the main shaft to reciprocate in the clockwise and counterclockwise directions, and the torsion spring drives the reset shaft to rotate to drive the rotated main shaft to rotate back to the initial angle. On the one hand, the torsion springs of the two reset shafts have opposite torsional directions. When the main shaft rotates to the initial angle driven by one reset shaft, the remaining kinetic energy on the main shaft will drive the main shaft to continue rotating, so as to drive the other reset shaft to rotate and apply force to the main shaft, thereby repeatedly applying force to the main shaft by alternating the two reset shafts, so that the main shaft can accurately return to the initial angle. On the other hand, the torsion spring applies a flexible elastic force to the main shaft through the reset shaft, thereby reducing the risk of damage to the main shaft.

[0020] In some embodiments, a cooling system is further included. The cooling system includes a plurality of flow channels disposed inside the first mold body and the second mold body. The flow channels are used to accommodate cooling media. The flow channels are disposed around the molding cavity.

[0021] In the technical solution of the embodiment of the present application, the flow channel for accommodating the cooling medium is arranged around the molding cavity, so that the temperature of the molding liquid filling the molding cavity can be evenly reduced, so that various parts of the molecular tower tube can shrink synchronously during the cooling and hardening process, thereby reducing the problems of large surface stress and uneven wall thickness of the molecular tower tube caused by uneven shrinkage.

[0022] In some embodiments, the first mold body includes a first parting surface, the second mold body includes a second parting surface, the first parting surface and the second parting surface are fitted together to close the mold, the first parting surface and the second parting surface are both provided with grooves, the groove of the first molding surface and the groove of the second molding surface are assembled into a cooling cavity for accommodating a cooling medium, the cooling cavity is connected to the flow channel, and the cooling cavity is adjacent to the molding cavity; wherein, the number of cooling cavities is multiple, and the multiple cooling cavities are arranged around the molding cavity, and the cooling cavity is arranged corresponding to the molding groove.

[0023] In the technical solution of the embodiment of the present application, multiple cooling cavities are arranged around the molding cavity, so that the part of the molecular tower tube close to the first parting surface can shrink evenly during the hardening process; since the temperature is lower closer to the cooling cavity, the cooling cavity is arranged corresponding to the molding groove, and the reinforcement part can compensate for the shrinkage size of the outer wall of the part of the molecular tower tube facing the cooling cavity, thereby avoiding the appearance of excessive shrinkage marks on the outer wall of the part of the molecular tower tube facing the cooling cavity.

[0024] In some embodiments, the cooling cavity is connected to the molding cavity through a cooling port, and the groove depth of the molding groove corresponding to the cooling cavity among the multiple molding grooves is greater than the groove depths of the other molding grooves.

[0025] In the technical solution of the embodiment of the present application, since the cooling medium can contact the molecular tower tube through the cooling port, the temperature at the cooling port is lower than the temperature at other positions of the molding cavity, resulting in that the molecular tower tube facing the cooling port is more strongly affected by the cooling medium during the cooling process. The groove depth of the molding groove corresponding to the cooling cavity among multiple molding grooves is greater than the groove depth of other molding grooves, so that the reinforcement part of the molecular tower tube at the corresponding cooling port is larger in size and can shrink under the influence of low temperature and compensate for the shrinkage of the outer wall of the molecular tower at this location, thereby avoiding the corresponding cooling port from causing concave marks due to excessive shrinkage, and making the thickness of the tube wall of the molecular tower tube uniform at various locations.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the external structure of a thin-walled high-air-tightness molecular tower tube die-casting molding method provided in some embodiments of the present application;

[0029] Figure 2 A top view of a die-casting method for a thin-walled, high-air-tightness molecular tower tube provided in some embodiments of the present application;

[0030] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0031] Figure 4 A side view of a die-casting method for a thin-walled, high-air-tightness molecular tower tube provided in some embodiments of the present application;

[0032] Figure 5 It is the cross-sectional view at BB;

[0033] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0034] Figure 7A partial structural schematic diagram of a method for die-casting a thin-walled, high-air-tightness molecular tower tube provided in some embodiments of the present application;

[0035] Figure 8 A schematic diagram of the cooperation between a third mold body and an insert provided in some embodiments of the present application;

[0036] Fig. 9 A schematic structural diagram of a third mold body provided in some embodiments of the present application.

[0037] Icons: 1-first mold body; 10-first molding surface; 11-pouring port; 12-first parting surface; 2-second mold body; 20-second molding surface; 21-second parting surface; 3-third mold body; 30-third molding surface; 31-insert core; 310-molding groove; 311-first end face; 312-constituent; 32-control structure; 320-spindle; 321-driving member; 322-reset shaft; 4-molding cavity; 5-plug-in; 50-slot; 6-cooling cavity; 60-cooling port; 7-molecular tower tube. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0040] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0044] According to some embodiments of the present application, optionally, Figure 1~Figure 4 , Figure 7 As shown, the present application provides a die-casting mold for a thin-walled high-air-tightness molecular tower tube 7. The die-casting mold for the thin-walled high-air-tightness molecular tower tube 7 includes a first mold body 1, a second mold body 2 and a third mold body 3. The first mold body 1 has a first molding surface 10; the second mold body 2 has a second molding surface 20; the third mold body 3 has a third molding surface 30. The first molding surface 10, the second molding surface 20 and the third molding surface 30 form a molding cavity 4 for molding the molecular tower tube 7. The third mold body 3 is provided with a core insert 31 and a control mechanism. The core insert 31 passes through the third molding surface 30 and extends into the molding cavity 4. The outer peripheral surface of the core insert 31 is provided with a plurality of molding grooves 310 for molding the reinforcement part of the molecular tower tube 7, and the control mechanism drives the core insert 31 to rotate during the process of injecting molding liquid into the molding cavity 4.

[0045] The molecular tower tube 7 mentioned in the present application is formed by die casting.

[0046] The thin-walled high-air-tightness molecular tower tube 7 die-casting mold mentioned in the present application is used to produce a smaller molecular tower tube 7 that can be used in small-sized equipment such as indoor oxygen generators.

[0047] Die casting requires heating the metal to a liquid state, then injecting the liquid metal (i.e. the molding liquid mentioned in this application) into the die casting mold, allowing it to fill the mold molding cavity 4 under a certain pressure, cooling it to solidification, and then opening the mold to take out the casting.

[0048] The first mold body 1 may be a fixed mold, and the second mold body 2 and the third mold body 3 may be movable molds.

[0049] The products and finished products mentioned in this application are all molecular tower tube 7.

[0050] The mold-closing direction of the first mold body 1 and the second mold body 2 is a vertical direction, and the mold-closing direction of the third mold body 3 and the first mold body 1 (and the second mold body 2) is a horizontal direction.

[0051] The second mold body 2 is first molded with the first mold body 1, and then the third mold body 3 is molded with the first mold body 1 and the second mold body 2. The third mold body 3 is limited by the first mold body 1 and the second mold body 2 so that the external shape of the molding cavity 4 can meet the shape requirements of the product; or, the third mold body 3 is first molded with the first mold body 1, and after confirming the extension direction and position of the core 31, the second mold body 2 is molded with the first mold body 1 and the second mold body 2 so that the position and direction of the internal cavity of the product meet the requirements.

[0052] The third mold body 3 is provided with a core insert 31 and a control mechanism. The core insert 31 passes through the third molding surface 30 and extends into the molding cavity 4. The core insert 31 enables the manufactured molecular tower tube 7 to have a cavity inside. Among them, the outer peripheral surface of the core insert 31 is provided with a plurality of molding grooves 310 for the reinforcement part of the molding molecular tower tube 7. The reinforcement part can support the molecular tower tube 7 so that the thin-walled molecular tower tube 7 has a higher strength. The control mechanism drives the core insert 31 to rotate during the process of the molding liquid being injected into the molding cavity 4. The thin-walled high-airtightness molecular tower tube 7 die-casting mold provided in the present application is used for molding thin-walled In order to make the wall of the product thinner, the distance between the core 31 and the first molding surface 10 and the second molding surface 20 is shorter, the speed of the molding liquid filling the local molding cavity 4 is faster, and the molding groove 310 is provided on the surface of the core 31 so that the molding liquid flows along the core 31 The process is not smooth, the liquid surface of the molding liquid (that is, the front end of the flowing molding liquid) cannot push the air away in time, and the air may be drawn into the molding liquid and remain between the molding groove 310 and the molding liquid. The residual air will cause pores to appear on the inner wall of the final molded product, and the molecular tower will have air. The regional strength of the hole is poor, which may cause the molecular tower to be damaged due to the difficulty in withstanding the internal negative pressure (i.e., a high vacuum degree). In order to overcome the defect that pores are easy to appear on the surface of the finished product, during the process of the molding liquid being injected into the molding cavity 4 (i.e., the stage when the molding liquid has a high fluidity), the insert 31 can rotate under the drive of the control mechanism, driving the molding liquid to rotate, so that the air that may be hidden in the molding groove 310 is taken away from the molding groove 310 by the molding liquid, and then leaves the molding liquid driven by buoyancy, so that the molding liquid can completely adhere to the inner wall of the molding cavity 4 and the surface of the insert 31. The thin-walled high-air-tightness molecular tower tube 7 die-casting mold provided by the present application can reduce the risk of surface defects; the molecular tower tube 7 with a thinner wall can dissipate heat to the outside faster during the internal condensation operation, thereby increasing the reaction rate inside the molecular tower, and the thinner wall of the molecular tower can reduce the space occupied by the wall of the molecular tower tube 7, thereby reducing the size of the molecular tower; in summary, the thin-walled high-air-tightness molecular tower tube 7 die-casting mold provided by the present application can be made into a molecular tower tube 7 with a thinner wall, which can maintain a higher vacuum degree inside, has a faster internal reaction rate, and is smaller in size.

[0053] According to some embodiments of the present application, optionally, Figure 3 , Figure 7~Figure 9 As shown, the core insert 31 has a first end face 311 located inside the molding cavity 4 and opposite to the third molding surface 30 , the molding groove 310 on the outer peripheral surface of the core insert 31 extends to the first end face 311 , and the first molding surface 10 is provided with a pouring port 11 for injecting molding liquid into the molding cavity 4 , and the pouring port 11 is adjacent to the third molding surface 30 .

[0054] The position of the pouring port 11 corresponds to the opening of the molecular tower tube 7 , that is, the bottom of the molecular tower; the position of the first end surface 311 corresponds to the top of the molecular tower tube 7 .

[0055] The core insert 31 has a first end face 311 located inside the molding cavity 4 and opposite to the third molding surface 30. The first molding surface 10 is provided with a pouring port 11 adjacent to the third molding surface 30. The molding liquid injected into the molding cavity 4 from the pouring port 11 flows from bottom to top and from the third molding surface 30 to the first end face 311. In the process of the molding liquid filling the molding cavity 4 from the third molding surface 30 to the first end face 311, since the molding groove 310 on the outer peripheral surface of the core insert 31 extends to the first end face 311, the molding liquid After filling the portion of the molding groove 310 close to the third molding surface 30, the air is pushed along the molding groove 310 to the first end surface 311, and then the air is pushed out directly from the molding groove 310. The molding liquid pushes the air in the molding groove 310 in a smooth and unimpeded process, thereby reducing the probability of air remaining in the molding groove 310, thereby reducing the probability of pores appearing in the reinforced part of the manufactured molecular tower tube 7, and improving the yield rate of products made by the thin-walled and high-airtightness molecular tower tube 7 die-casting mold provided in this application.

[0056] According to some embodiments of the present application, optionally, Figure 3 As shown, the projection of the third molding surface 30 on the first molding surface 10 completely falls into the pouring port 11 .

[0057] Since the wall of the produced molecular tower tube 7 is relatively thin and the spacing between the first molding surface 10 and the insert 31 is relatively small, it is difficult for a large amount of molding liquid to enter the molding cavity 4 in a short time. The opening of the pouring port 11 is relatively large and is arranged around the third mold body 3 corresponding to the position of the first molding surface 10, so that the molding liquid can enter the molding cavity 4 more dispersedly, reducing the risk of the molding liquid being difficult to enter the molding in a short time and gathering at the pouring port 11, resulting in excessive pressure at the pouring port 11 and damage, and also speeding up the speed of the molding liquid filling the molding cavity 4.

[0058] According to some embodiments of the present application, optionally, Figure 5 , Figure 7~Figure 9 As shown, the core insert 31 includes a pair of components 312, the outer surface of the component 312 includes a curved surface and an opposite surface, the opposite surfaces of the two components 312 are arranged opposite to each other, the molding groove 310 is arranged on the curved surface of the component 312, the axis of rotation of the core insert 31 is located between the two components 312, and the spacing distance between the two components 312 gradually increases from the third molding surface 30 to the surface of the core insert 31 located in the molding cavity 4 and away from the third molding surface 30; it also includes a pair of plug-ins 5, the first molding surface 10 and the second molding surface 20 are both provided with a slot 50 for installing the plug-in 5, the plug-in 5 extends between the pair of components 312, the plug-in 5 is located at one end of the core insert 31 in the molding cavity 4 away from the third molding surface 30, and in the closing direction of the first mold body 1 and the second mold body 2, there is a gap between the pair of plug-ins 5, and the projections of the pair of plug-ins 5 on the first molding surface 10 overlap.

[0059] A pair of components 312 enables the manufactured molecular tower tube 7 to have two independent cavities inside. Compared with the existing molecular towers that require multiple molecular towers to be connected in parallel to perform complete separation operations, the molecular tower tube 7 made of the thin-walled and highly airtight molecular tower tube 7 die-casting mold provided in the present application can reduce the number of molecular towers, further reduce the space required for the operation of the molecular towers, and increase the scope of application of the molecular towers.

[0060] The size of the portion of the plug-in 5 inserted into the slot 50 can be larger than the size of the portion of the plug-in 5 located in the molding cavity 4, so that there can be a larger contact area between the plug-in 5 and the slot 50, thereby improving the connection stability between the plug-in 5 and the slot 50.

[0061] The insert 31 includes a pair of components 312, so that the manufactured molecular tower tube 7 can have two independent cavities inside to meet the use requirements. The spacing between the two components 312 gradually increases from the third molding surface 30 to the surface of the insert 31 located in the molding cavity 4 and away from the third molding surface 30, so that the connection between the two internal cavities inside the molecular tower tube 7 is stable. At the same time, when condensation and heat dissipation are respectively carried out in the two cavities, the heat dissipated from any cavity through the outer wall is not easy to dissipate to the outer wall of the other cavity to affect the normal heat dissipation of the other cavity; the plug 5 extends into a pair of components Between the components 312, the part of the molecular tower tube 7 located between the plug-in 5 and the component 312 can form a thinner tube wall, which is convenient for improving the heat dissipation effect of the molecular tower. There is a gap between a pair of the plug-ins 5, so that the part of the molecular tower tube 7 located between the two cavities can remain connected, thereby improving the overall strength of the molecular tower; the projections of the pair of plug-ins 5 on the first molding surface 10 overlap, so that the thickness of the tube wall around the two cavities of the molecular tower tube 7 is uniform, thereby reducing the probability of uneven heat dissipation caused by the thickness of the tube wall in the local area of ​​the molecular tower being too thin or too thick.

[0062] According to some embodiments of the present application, optionally, Figure 1~Figure 2 , Figure 5 , Figure 8 As shown, a slot 50 provided on the first mold body 1 and the second mold body 2 passes through the first mold body 1 and the second mold body 2, the plug-in 5 is slidably matched with the inner wall of the slot 50, and a pair of plug-ins 5 are detachably connected to the first mold body 1 and the second mold body 2.

[0063] After the first mold body 1 and the second mold body 2 are molded together, the plug 5 can be inserted into the molding cavity 4 through the slot 50 , and then the third mold body 3 can be molded together with the first mold body 1 and the second mold body 2 , and the extension direction of the insert 31 can be guided by the plug 5 .

[0064] During demolding, the already formed molecular tower tube 7 can be separated from the first molding surface 10 and / or the second molding surface 20 by pushing the plug-in 5, and then the mold can be opened, so that the adhesion area between the molecular tower tube 7 and the first molding surface 10 and / or the second molding surface 20 is smaller when the mold is opened, thereby reducing the risk of the molecular tower tube 7 being damaged by adhesion and pulling by the first molding surface 10 and / or the second molding surface 20.

[0065] According to some embodiments of the present application, optionally, Figure 5 and Figure 8 As shown, the portion of the plug 5 extending between a pair of components 312 has a first surface parallel to the closing direction of the first mold body 1 and the second mold body 2, and the angle at which the opposite surface of the component 312 is parallel to the first surface is taken as the initial angle. The core insert 31 is driven by the control mechanism to reciprocate in the clockwise and counterclockwise directions, and the angle of each rotation of the core insert 31 does not exceed 5°.

[0066] When the rotation angle of the core 31 is greater than or equal to 5°, the core 31 will collide with the plug 5 located between a pair of components 312 each time it rotates, which may cause damage or dents on the components 312 and the core 31 due to the collision, affecting the surface quality of the manufactured molecular tower tube 7.

[0067] During the process of the molding liquid being injected into the molding cavity 4, the core insert 31 rotates back and forth in the clockwise and counterclockwise directions. When the angle of each rotation of the core insert 31 does not exceed 5°, the core insert 31 will not contact the plug 5, thereby reducing the risk of damage to the core insert 31 and the plug 5 due to scratches or collisions, and extending the service life of the core insert 31 and the plug 5. In addition, the small-angle rotation enables the core insert 31 to rotate more times in a shorter time, thereby enhancing the driving effect of the core insert 31 on the molding liquid.

[0068] According to some embodiments of the present application, optionally, Fig. 9 As shown, the control mechanism includes a main shaft 320, a driving member 321 and two reset shafts 322; the main shaft 320 is connected to the output end of the driving member 321 and the insert 31, and the driving member 321 drives the main shaft 320 to reciprocate in the clockwise direction and the counterclockwise direction; the reset shaft 322 is connected to the third mold body 3 through a torsion spring, and the two reset shafts 322 are respectively arranged on both sides of the main shaft 320 and are tightly attached to the main shaft 320; wherein, the reset shaft 322 is fixedly sleeved with a gear, and the outer peripheral surface of the main shaft 320 is provided with teeth for meshing with the gear of the reset shaft 322, and the torsion spring drives the reset shaft 322 to rotate to drive the rotated main shaft 320 to rotate back to the initial angle.

[0069] The main shaft 320 is meshed with two reset shafts 322 via gears and teeth.

[0070] The driving member 321 drives the main shaft 320 to reciprocate in the clockwise and counterclockwise directions, and the torsion spring drives the reset shaft 322 to rotate to drive the rotated main shaft 320 to rotate back to the initial angle. On the one hand, the torsion springs of the two reset shafts 322 have opposite torsional directions. When the main shaft 320 rotates to the initial angle driven by one reset shaft 322, the remaining kinetic energy on the main shaft 320 will drive the main shaft 320 to continue rotating, so as to drive the other reset shaft 322 to rotate and apply force to the main shaft 320, so that the main shaft 320 can accurately return to the initial angle by alternating and repeatedly applying force to the main shaft 320 by the two reset shafts 322. On the other hand, the torsion spring applies a flexible elastic force to the main shaft 320 through the reset shaft 322, thereby reducing the risk of damage to the main shaft 320.

[0071] According to some embodiments of the present application, optionally, a cooling system is also included, and the cooling system includes a plurality of flow channels arranged on the inner side of the first mold body 1 and the second mold body 2, the flow channels are used to accommodate cooling medium, and the flow channels are arranged around the molding cavity 4.

[0072] The cooling medium can be, but is not limited to, water, ethanol, oil and other fluids.

[0073] The flow channel for accommodating the cooling medium is arranged around the molding cavity 4, so that the temperature of the molding liquid filling the molding cavity 4 can be evenly reduced, so that various parts of the molecular tower tube 7 can shrink synchronously during the cooling and hardening process, reducing the problems of large surface stress and uneven wall thickness of the molecular tower tube 7 caused by uneven shrinkage.

[0074] According to some embodiments of the present application, optionally, Figure 3 , Figure 5~Figure 7 As shown, the first mold body 1 includes a first parting surface 12, and the second mold body 2 includes a second parting surface 21. The first parting surface 12 and the second parting surface 21 are fitted together to close the mold. The first parting surface 12 and the second parting surface 21 are both provided with grooves. The groove of the first molding surface 10 and the groove of the second molding are assembled into a cooling cavity 6 for accommodating a cooling medium. The cooling cavity 6 is connected to the flow channel, and the cooling cavity 6 is adjacent to the molding cavity 4. Among them, the number of cooling cavities 6 is multiple, and the multiple cooling cavities 6 are arranged around the molding cavity 4, and the cooling cavity 6 is arranged corresponding to the molding groove 310.

[0075] Multiple cooling cavities 6 are arranged around the molding cavity 4, so that the part of the molecular tower tube 7 close to the first parting surface 12 can shrink evenly during the hardening process; because the temperature is lower closer to the cooling cavity 6, the cooling cavity 6 is arranged corresponding to the molding groove 310, and the reinforcement part can compensate for the shrinkage size of the outer wall of the part of the molecular tower tube 7 facing the cooling cavity 6, thereby avoiding the appearance of excessive shrinkage marks on the outer wall of the part of the molecular tower tube 7 facing the cooling cavity 6.

[0076] According to some embodiments of the present application, optionally, Figure 6As shown, the cooling cavity 6 is connected to the molding cavity 4 through the cooling port 60 , and the groove depth of the molding groove 310 corresponding to the cooling cavity 6 among the multiple molding grooves 310 is greater than the groove depths of the other molding grooves 310 .

[0077] Since the cooling medium can contact the molecular tower tube 7 through the cooling port 60, the temperature at the cooling port 60 is lower than the temperature at other positions of the molding cavity 4, resulting in that the molecular tower tube 7 facing the cooling port 60 is more strongly affected by the cooling medium during the cooling process. The groove depth of the molding groove 310 corresponding to the cooling cavity 6 among the multiple molding grooves 310 is greater than the groove depth of other molding grooves 310, so that the reinforcement part of the molecular tower tube 7 at the corresponding cooling port 60 is larger, and can shrink under the influence of low temperature and compensate for the shrinkage of the outer wall of the molecular tower at this location, thereby avoiding the corresponding cooling port 60 from causing concave marks due to excessive shrinkage, and making the thickness of the tube wall of the molecular tower tube 7 uniform at various locations.

[0078] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A thin-walled high-airtightness molecular tower tube die-casting method, characterized in that: include: A first mold body having a first molding surface; A second mold body having a second molding surface; A third mold body has a third molding surface, wherein the first molding surface, the second molding surface and the third molding surface enclose a molding cavity for molding a molecular tower tube, and the third mold body is provided with an insert and a control mechanism, and the insert passes through the third molding surface and extends into the molding cavity; The outer peripheral surface of the insert is provided with a plurality of molding grooves for molding the reinforcement part of the molecular tower tube, and the control mechanism drives the insert to rotate during the process of the molding liquid being injected into the molding cavity; The insert includes a pair of components, the outer surfaces of the components include a curved surface and an opposing surface, the opposing surfaces of the two components are arranged opposite to each other, the molding groove is arranged on the curved surface of the components, the axis of rotation of the insert is located between the two components, and the spacing distance between the two components gradually increases from the third molding surface to the surface of the insert located in the molding cavity and away from the third molding surface; It also includes a pair of plug-ins, the first molding surface and the second molding surface are both provided with a slot for installing the plug-in, the plug-in extends between the pair of components, the plug-in is located at one end of the plug-in in the molding cavity away from the third molding surface, there is a gap between the pair of plug-ins in the mold closing direction of the first mold body and the second mold body, and the projections of the pair of plug-ins on the first molding surface overlap; The portion of the plug extending into the pair of components has a first surface parallel to the mold closing direction of the first mold body and the second mold body, and the angle at which the opposite surface of the component is parallel to the first surface is taken as the initial angle. The plug core is driven by the control mechanism to reciprocate in the clockwise and counterclockwise directions, and the angle of each rotation of the plug core does not exceed 5°; The control mechanism includes a main shaft, a driving member and two reset shafts, the main shaft is connected to the output end of the driving member and the insert, the driving member drives the main shaft to reciprocate in the clockwise direction and the counterclockwise direction; the reset shaft is connected to the third mold body through a torsion spring, and the two reset shafts are respectively arranged on both sides of the main shaft and are tightly attached to the main shaft; The reset shaft fixing sleeve is provided with a gear, the outer peripheral surface of the main shaft is provided with teeth for meshing with the gear of the reset shaft, and the torsion spring drives the reset shaft to rotate to drive the rotated main shaft to rotate back to the initial angle.

2. The die-casting method for a thin-walled high-airtight molecular tower tube according to claim 1, characterized in that: The insert has a first end face located inside the molding cavity and opposite to the third molding surface. The molding groove on the outer peripheral surface of the insert extends to the first end face. The first molding surface is provided with a pouring port for injecting molding liquid into the molding cavity. The pouring port is adjacent to the third molding surface.

3. The die-casting method for a thin-walled high-airtight molecular tower tube according to claim 2, characterized in that: The projection of the third molding surface on the first molding surface completely falls into the pouring port.

4. The die-casting method for a thin-walled high-airtight molecular tower tube according to claim 1, characterized in that: The slots arranged on the first mold body and the second mold body pass through the first mold body and the second mold body, the plug-in is slidably matched with the inner wall of the slot, and a pair of the plug-ins are detachably connected to the first mold body and the second mold body.

5. The die-casting method for a thin-walled high-airtight molecular tower tube according to claim 1, characterized in that: It also includes a cooling system, which includes a plurality of flow channels arranged inside the first mold body and the second mold body, the flow channels are used to accommodate cooling media, and the flow channels are arranged around the molding cavity.

6. The die-casting method for a thin-walled high-airtight molecular tower tube according to claim 5, characterized in that: The first mold body includes a first parting surface, the second mold body includes a second parting surface, the first parting surface and the second parting surface are fitted together to close the mold, the first parting surface and the second parting surface are both provided with grooves, the groove of the first molding surface and the groove of the second molding surface are assembled into a cooling cavity for accommodating a cooling medium, the cooling cavity is communicated with the flow channel, and the cooling cavity is adjacent to the molding cavity; There are multiple cooling cavities, which are arranged around the molding cavity, and the cooling cavities are arranged corresponding to the molding grooves.

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