Machining core of nut with spaced internal threads, machining mold and demolding method

Abstract

The invention relates to a machining mold core, a machining mold and a demolding method.The machining mold core comprises two threaded petal blocks, the outer walls of the threaded petal blocks are arc surfaces, external threads are arranged at the front ends of the outer walls and used for forming the internal threads of the nut, and the inner walls of the threaded petal blocks are inclined planes; a sliding groove from the rear end to the front end is formed in the inclined face, and a hanging table is arranged at the rear end of the outer wall of the threaded petal block; the cable-stayed block is arranged between the two threaded petal blocks, the cable-stayed block and the two threaded petal blocks form a circular truncated cone structure, the inclined face of each threaded petal block is gradually close to the axis of the circular truncated cone structure from the rear end to the front end, the side wall, connected with the external threads of the threaded petal blocks, of the cable-stayed block is a smooth arc face, and the smooth arc face is slightly higher than the external threads. A set of side walls of the inclined pulling block are attached to the inner walls of the two threaded petal blocks correspondingly, and the side walls of the inclined pulling block are provided with guide rails arranged in the sliding grooves in a sliding mode. By means of the device, it can be ensured that the glue shoveling phenomenon is avoided during nut demolding.

Description

Technical Field

[0001] The present application relates to the technical field of injection mold structures, and in particular to a processing core, a processing mold and a demoulding method for a nut with spaced internal threads. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material, and is known as the "mother of industry".

[0003] like Figure 1 As shown in the figure, some nuts have internal threads, but the internal threads are not full circles, but are separated by two smooth surfaces. At present, when the existing mold is used to continuously process such nuts with spaced internal threads, the mold core swings too much and loses accuracy, resulting in smooth surface scraping, which has caused great complaints from customers. Summary of the invention

[0004] The present application provides a processing core, a processing mold and a demoulding method for nuts with spaced internal threads, which can solve the technical problems in the prior art of losing precision and causing smooth surface scraping when processing nuts with spaced internal threads.

[0005] In the first aspect, the embodiment of the present application provides a processing core for a nut with spaced internal threads, comprising: two thread petal blocks, both of whose outer walls are arc surfaces, and the front end of the outer wall is provided with external threads, the external threads are used to form the internal threads of the nut, the inner wall of the thread petal block is an inclined surface, and the inclined surface is provided with a slide groove from the rear end to the front end, and the rear end of the outer wall of the thread petal block is provided with a hanging platform. An inclined pull block is arranged between the two thread petal blocks and forms a truncated cone structure with the two thread petal blocks, and the inclined surface of the thread petal block gradually approaches the axis of the truncated cone structure from the rear end to the front end, the side wall of the inclined pull block connected to the external thread of the thread petal block is a smooth arc surface, and the smooth arc surface is slightly higher than the external thread, a group of side walls of the inclined pull block are respectively fitted with the inner walls of the two thread petal blocks, and the side wall of the inclined pull block is provided with a guide rail slidably arranged in the slide groove.

[0006] In combination with the first aspect, in one embodiment, the slide groove is centrally arranged on the inclined surface, the guide rail is centrally arranged protruding from the side wall of the inclined pull block, and the side wall of the guide rail is recessed inward to form an acute angle with the side wall of the inclined pull block.

[0007] In combination with the first aspect, in one embodiment, a clearance groove is provided at the included angle of the acute angle.

[0008] In combination with the first aspect, in one embodiment, the front end surface of the truncated cone structure is further provided with a boss structure, and the boss structure includes a first protrusion protruding from the front end surfaces of the two threaded petal blocks respectively, and a second protrusion protruding from the front end surface of the inclined pull block.

[0009] In combination with the first aspect, in one implementation, the cross-sectional area of ​​the boss structure is smaller than the cross-sectional area of ​​the frustum structure.

[0010] In combination with the first aspect, in one embodiment, a limiting groove is further provided at the bottom of the slide groove of the threaded petal block, the length of the limiting groove is shorter than the length of the slide groove, and the front end of the limiting groove is flush with the front end of the slide groove, and a limiting block is provided on the front end surface of the second protrusion, and both ends of the limiting block extend to the side walls of the second protrusion, and the extended part cooperates with the limiting groove to limit the stroke of the threaded petal block.

[0011] In combination with the first aspect, in one embodiment, a plurality of water transport holes are provided on the side wall of the inclined pull block connected to the external thread of the threaded petal block, and on the front end surface of the second protrusion.

[0012] In the second aspect, an embodiment of the present application provides a processing mold, comprising: a fixed template; a movable template, which is engaged with the fixed template to form a cavity, a processing core with a nut with spaced internal threads as described in any of the above embodiments is arranged in the cavity, and a gap is left between the front end of the processing core and the fixed template, the movable template comprises a pad, an intermediate plate and a top plate, the three are connected in sequence, the rear end of the inclined pull block is fixed to the pad, the intermediate plate is provided with a notch for accommodating a hanging platform for accommodating the threaded petal block, the edge of the hanging platform is gap-matched with the notch, and the external thread of the threaded petal block is protruding from the outside of the top plate.

[0013] In a third aspect, an embodiment of the present application provides a demolding method for a processing mold based on the above-mentioned embodiment, the steps comprising: during demolding, moving the movable template to a first preset distance in a direction away from the fixed template; the pad of the movable template fixes the inclined pull block without moving, and the middle plate and the top plate are simultaneously moved in a direction close to the fixed template, and the middle plate pushes the threaded petal block to perform a linear motion inwardly contracting along the side wall of the inclined pull block; until the middle plate and the top plate move to a second preset distance, the external thread of the threaded petal block is completely separated from the internal thread of the nut to be demolded, and the top plate is moved to a third preset distance in a direction close to the fixed template, so that the nut to be demolded outside the top plate is detached.

[0014] In combination with the third aspect, in some embodiments, the step of the intermediate plate pushing the threaded petal block to perform a linear motion of inward contraction along the side wall of the inclined pull block includes: during the movement, the intermediate plate pushes the hanging platform of the threaded petal block, and the guide rail of the threaded petal block slides in the slide groove of the inclined pull block, so that the threaded petal block performs a linear motion of inward contraction from the rear end to the front end along the side wall of the inclined pull block.

[0015] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0016] When processing nuts with spaced internal threads, the inclined pull block is set between two thread petals to form a truncated cone structure with the thread petals. The outer walls of the two thread petals are arc surfaces, and the front ends of the outer walls are also provided with external threads, which are used to form the internal threads of the nut; and the side walls where the inclined pull block and the external threads of the thread petals meet are smooth arc surfaces, so that the inner surface of the nut can be smoothly punched out and the processed nut can have high-precision internal threads. By setting the smooth arc surface slightly higher than the external threads, so that the smooth arc surface of the inner surface of the nut is slightly lower than the internal threads of the nut, it can be ensured that the phenomenon of scraping glue is avoided when the nut is demoulded.

[0017] When the nut with spaced internal threads is demoulded, the position of the inclined pull block is fixed, and the two thread petals can slide relative to the inclined pull block. The slide grooves of the thread petals cooperate with the guide rails of the inclined pull block, so that the two thread petals can respectively make linear movements inward along a group of side walls of the inclined pull block. During this period, the spacing between the two thread petals gradually becomes smaller and gradually approaches the axis of the truncated cone structure, so that the external thread at the front end of the outer wall of the thread petal block is gradually separated from the internal thread of the nut to be demoulded, and the tooth tip of the internal thread of the nut to be demoulded will not be damaged.

[0018] In addition, the hanging platform provided at the rear end of the outer wall of the threaded petal block can be used to be installed on the mold and can also serve as a "force point" so that the template pushes the hanging platform and then drives the threaded petal block to move. Therefore, the technical solution of this application solves the technical problem of losing precision and smooth surface scraping when processing nuts with spaced internal threads in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of a nut with spaced internal threads in the background art;

[0021] Figure 2 It is a schematic diagram of a processing core of a nut with spaced internal threads in an embodiment of the present application;

[0022] Figure 3 for Figure 2 Schematic diagram of the decomposition of

[0023] Figure 4 This is a schematic diagram of the demoulding of the processing mold in the embodiment of the present application;

[0024] Figure 5 Schematic diagram of the process of demoulding a mold in an embodiment of the present application.

[0025] In the figure:

[0026] 1. Cone structure; 11. Threaded petal block; 111. External thread; 112. Slide groove; 1121. Limiting groove; 113. Hanging platform; 12. Inclined pull block; 121. Smooth arc surface; 122. Guide rail; 123. Avoiding groove; 124. Water transport hole;

[0027] 2. Boss structure; 21. First protrusion; 22. Second protrusion; 23. Limit block;

[0028] 3. Set the template;

[0029] 4. Moving template; 41. Pad plate; 42. Middle plate; 43. Top plate. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, 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 only 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.

[0031] The embodiments of the present application provide a processing core, a processing mold and a demolding method for a nut with spaced internal threads, which can solve the technical problems in the prior art of losing precision and causing smooth surface scraping when processing a nut 5 with spaced internal threads.

[0032] In a first aspect, an embodiment of the present application provides a machining core for a nut 5 having spaced internal threads.

[0033] Reference Figures 1 to 3 , Figure 1 It is a schematic diagram of a nut 5 with spaced internal threads in the background art; Figure 2It is a schematic diagram of a machining core of a nut 5 with spaced internal threads in an embodiment of the present application; Figure 3 for Figure 2 Schematic diagram of the decomposition of Figures 1 to 3 As shown, in one embodiment, the machining core of the spaced internal thread nut 5 includes two thread petals 11 and an inclined pull block 12. The outer walls of the two thread petals 11 are arc surfaces, and the front end of the outer wall is provided with an external thread 111, and the external thread 111 is used to form the internal thread 51 of the nut 5. The inner wall of the thread petal 11 is an inclined surface, and the inclined surface is provided with a slide groove 112 from the rear end to the front end, and the rear end of the outer wall of the thread petal 11 is provided with a hanging platform 113. The inclined pull block 12 is arranged between the two threaded petal blocks 11 and forms a truncated cone structure 1 with the two threaded petal blocks 11, and the inclined surface of the threaded petal block 11 gradually approaches the axis of the truncated cone structure 1 from the rear end to the front end. The side wall of the inclined pull block 12 connected to the external thread 111 of the threaded petal block 11 is a smooth arc surface 121, and the smooth arc surface 121 is slightly higher than the external thread 111. A group of side walls of the inclined pull block 12 are respectively fitted with the inner walls of the two threaded petal blocks 11, and the side walls of the inclined pull block 12 are provided with guide rails 122 slidably arranged in the slide groove 112.

[0034] In this embodiment, the processing core of the nut 5 is used to produce the parts constituting the inner surface of the nut 5. In the actual processing process, the number of smooth arc surfaces 121 of the inclined pull block 12 and the number of thread petals 11 can be reasonably set according to the number of intervals of the internal thread 51 of the nut 5. Figure 1 As shown, there are only two intervals of the internal thread 51 of the nut 5 that need to be processed, so it is only necessary to set two smooth arc surfaces 121 on the inclined pull block 12 and set two thread petal blocks 11 on a set of side walls of the inclined pull block 12.

[0035] The hanging platform 113 provided at the rear end of the outer wall of the threaded petal block 11 is used to flexibly install the threaded petal block 11 on the mold. The threaded petal block 11 and the inclined pull block 12 are in inclined contact, and when the nut 5 is demoulded, the inner walls of the two threaded petals 11 can be respectively attached to a set of side walls of the inclined pull block 12 through the cooperation of the slide groove 112 and the guide rail 122, and the side walls of the inclined pull block 12 can synchronously perform a linear movement of inward contraction from the rear end to the front end. In addition, the guide rail 122 and the slide groove 112 can only be separated by sliding, and when sliding, the two are always tightly connected together.

[0036] In this embodiment, when the nut 5 is processed, the inclined pull block 12 is set between the two threaded petals 11, and a truncated cone structure 1 is formed between the threaded petals 11. The outer walls of the two threaded petals 11 are arc surfaces, and the front end of the outer wall is also provided with an external thread 111, and the external thread 111 is used to form the internal thread 51 of the nut 5; and the side wall where the inclined pull block 12 and the external thread 111 of the threaded petal 11 are connected is a smooth arc surface 121, so that the inner surface of the nut 5 is smoothly stamped out, and the processed nut 5 has a high-precision internal thread 51. By setting the smooth arc surface 121 to be slightly higher than the external thread 111, for example: the height is 0.2mm, so that the smooth arc surface 121 on the inner surface of the nut 5 is slightly lower than the internal thread 51 of the nut 5, it can be ensured that the phenomenon of scraping glue is avoided when the nut 5 is demoulded.

[0037] When the nut 5 is demoulded, the position of the inclined pull block 12 is fixed, and the two thread petal blocks 11 and the inclined pull block 12 can slide relative to each other. By setting the inner wall of the threaded petal block 11 to an inclined surface, and the inclined surface gradually approaches the axis of the truncated cone structure 1 from the rear end to the front end, and a slide groove 112 from the rear end to the front end is opened on the inclined surface, in addition, a group of side walls of the inclined pull block 12 are respectively fitted with the inner walls of the two threaded petal blocks 11, and the side wall of the inclined pull block 12 is provided with a guide rail 122 slidably set in the slide groove 112. By relying on the mutual cooperation between the slide groove 112 of the threaded petal block 11 and the guide rail 122 of the inclined pull block 12, the two threaded petal blocks 11 can respectively perform a linear movement of inward contraction along a group of side walls of the inclined pull block 12. During this period, the spacing between the two threaded petal blocks 11 gradually becomes smaller and gradually approaches the axis of the truncated cone structure 1, so as to realize the gradual separation of the external thread 111 at the front end of the outer wall of the threaded petal block 11 and the internal thread 51 of the nut 5 to be demolded, and will not damage the tooth tip of the internal thread 51 of the nut 5 to be demolded.

[0038] In addition, the hanging platform 113 provided at the rear end of the outer wall of the threaded petal block 11 can be used for installation on the mold and can also serve as a "force point" so that the template pushes the hanging platform 113 and then drives the threaded petal block 11 to move.

[0039] Further, in one embodiment, if Figure 3 As shown, the slide groove 112 is centrally arranged on the inclined surface, the guide rail 122 is centrally arranged on the side wall of the inclined pull block 12, and the side wall of the guide rail 122 is recessed inwardly to form an acute angle with the side wall of the inclined pull block 12. In this embodiment, by centrally arranging the slide groove 112 on the inclined surface and the guide rail 122 being centrally arranged on the side wall of the inclined pull block 12, the connection between the threaded petal block 11 and the inclined pull block 12 is made more secure and not easy to loosen or move due to external force. By recessing the side wall of the guide rail 122 inwardly and forming an acute angle with the side wall of the inclined pull block 12, it helps to reduce deviation and shaking during the sliding process, so that the guide rail 122 and the slide groove 112 will not fall off easily.

[0040] Further, in one embodiment, if Figure 3 As shown, an air avoidance groove 123 is provided at the included angle of the acute angle. In this embodiment, since the processing of the nut is mechanical processing, processing errors are difficult to avoid, and since the threaded petal block 11 and the inclined pull block 12 are connected by an inclined surface, and there is an acute angle between the side wall of the guide rail 122 and the side wall of the inclined pull block 12, it is difficult to correct the root. However, by providing an air avoidance groove 123 at the included angle of the acute angle, it is not necessary to repair the root, and the friction area between the threaded petal block 11 and the inclined pull block 12 can also be reduced, thereby reducing the friction force here.

[0041] Further, in one embodiment, if Figure 2 As shown, the front end surface of the truncated cone structure 1 is also provided with a boss structure 2, and the boss structure 2 includes a first protrusion 21 protruding from the front end surfaces of the two threaded petals 11, and a second protrusion 22 protruding from the front end surface of the inclined tie block 12. In this embodiment, through the above technical solution, on the one hand, the guide distance between the inclined tie block 12 and the threaded petal block 11 can be increased to avoid the swing of the threaded petal block 11 due to the short guide distance; on the other hand, with the boss structure 2, after the machining core is installed on the mold, the diameter tolerance accuracy of the boss structure 2 can be controlled, and through the cooperation with the groove of the fixed mold plate 3, it can play a certain positioning role, and prevent the mold from having gaps and misalignment of the mating surfaces due to the large number of mating surfaces after a long period of use.

[0042] Further, in one embodiment, Figure 2 As shown, the cross-sectional area of ​​the boss structure 2 is smaller than the cross-sectional area of ​​the truncated cone structure 1. In this embodiment, the above technical solution is beneficial to saving materials, and is also beneficial to the fixed template 3 described in the previous embodiment to position the boss structure 2. If the boss structure 2 is larger, the corresponding groove on the fixed template 3 must also be larger to meet the requirements.

[0043] Further, in one embodiment, if Figure 3 As shown, a limiting groove 1121 is also provided at the bottom of the slide groove 112 of the threaded petal block 11, the length of the limiting groove 1121 is shorter than the length of the slide groove 112, and the front end of the limiting groove 1121 is flush with the front end of the slide groove 112, and a limiting block 23 is provided on the front end surface of the second protrusion 22, and both ends of the limiting block 23 extend to the outside of the side wall of the second protrusion 22, and the extended part cooperates with the limiting groove 1121 to limit the stroke of the threaded petal block 11. In this embodiment, through the above technical solution, when the threaded petal block 11 makes a linear motion of inward contraction along the side wall of the inclined pull block 12, the collision of the two threaded petals 11 due to over-stroke occurs, which plays a safety protection role.

[0044] Further, in one embodiment, if Figure 2As shown, the side wall where the inclined pull block 12 is connected to the external thread 111 of the threaded petal block 11, and the front end face of the second protrusion 22 are provided with a plurality of water transport holes 124. In this embodiment, the nut 5 is a plastic product. When producing plastic products, the plastic needs to be heated (100-200°C, depending on the plastic required by the product). After the hot plastic is injected into the mold, the temperature of the mold will increase. The side wall where the inclined pull block 12 is connected to the external thread 111 of the threaded petal block 11, and the front end face of the second protrusion 22 are provided with a plurality of water transport holes 124. The water transport holes 124 are holes drilled for installing cooling water channels. During the injection molding process, the cooling water circulating through these water channels can quickly take away the heat in the mold cavity, so that the nut 5 can be quickly cooled and solidified. The purpose of doing this is to improve production efficiency, ensure the quality of the nut 5, and help control the dimensional accuracy and surface finish of the nut 5. In addition, a reasonable water channel design can also help reduce uneven thermal expansion of the mold and avoid deformation.

[0045] In a second aspect, an embodiment of the present application provides a processing mold.

[0046] Reference Figure 4 , Figure 4 This is a schematic diagram of the demoulding of the processing mold in the embodiment of the present application. Figure 4 As shown, the processing mold includes: a fixed template 3 and a movable template 4, the fixed template 3 and the movable template 4 are buckled to form a cavity, a processing core of the nut 5 described in any of the above embodiments is arranged in the cavity, and a gap is left between the front end of the processing core and the fixed template 3, the movable template 4 includes a pad 41, an intermediate plate 42 and a top plate 43, the three are connected in sequence, the rear end of the inclined pull block 12 is fixed to the pad 41, and a notch for accommodating a hanging platform 113 of the threaded petal block 11 is provided in the intermediate plate 42, and a gap is fitted between the edge of the hanging platform 113 and the notch, and the external thread 111 of the threaded petal block 11 is protruded from the outside of the top plate 43.

[0047] In this embodiment, the processing mold mainly includes a fixed template 3 and a movable template 4, which are buckled together to form a cavity, in which a processing core of the nut 5 described in any of the previous embodiments is arranged, and a gap is left between the front end of the processing core and the fixed template 3, and the gap is mainly used to form the shape of the outer surface of the nut 5. The movable template 4 mainly includes a pad 41, an intermediate plate 42 and a top plate 43, and these three plates are connected in sequence and are connected to the same guide column, which can ensure that there is no misalignment between the three plates during the movement. By fixing the rear end of the inclined pull block 12 on the pad 41, preferably, the inclined pull block 12 is installed at the center of the pad 41 to ensure that the position of the inclined pull block 12 will not change easily. By setting a notch in the middle plate 42 for the hanging platform 113 that accommodates the threaded petal block 11, it can be ensured that the threaded petal block 11 is slidably connected to the middle plate 42, or is movably connected to the middle plate 42. The gap between the edge of the hanging platform 113 and the notch is matched, so that the hanging platform 113 and the threaded petal block 11 can be relatively displaced. In this way, when the middle plate 42 moves, it will also apply a thrust to the hanging platform 113. This thrust will push the threaded petal block 11 to utilize the connection between the guide rail 122 and the slide groove 112 to make a linear movement inward along the side wall of the inclined pull block 12, thereby realizing the separation of the external thread 111 of the threaded petal block 11 and the internal thread 51 of the nut 5 to be demolded (that is, the nut 5 after injection molding and cooling only needs to be demolded in the next step). In addition, by protruding the external thread 111 of the threaded petal block 11 outside the top plate 43, when the threaded petal block 11 is completely separated from the nut 5 to be demolded, the top plate 43 can be moved quickly to utilize inertia to push the nut 5 to be demolded to a designated area and allow it to fall off freely, which is easy to operate and extremely efficient.

[0048] In a third aspect, an embodiment of the present application provides a demoulding method based on the processing mold in the previous embodiment.

[0049] Reference Figure 5 , Figure 5 Schematic diagram of the process flow of the demoulding method of the processing mold in the embodiment of the present application. Figure 5 As shown, in one embodiment, the steps of the demoulding method include:

[0050] Step S10, during demoulding, the movable mold plate 4 is moved in a direction away from the fixed mold plate 3 to a first preset distance.

[0051] In this embodiment, during demoulding, the movable template 4 (i.e., the three plates of the backing plate 41, the middle plate 42 and the top plate 43) is moved to a first preset distance away from the fixed template 3, so that a spacious moving space can be provided for moving the middle plate 42 and the top plate 43 in the subsequent steps. It should be noted that the first preset distance is calculated in advance by the staff, and there will be no problem of the distance being too short.

[0052] Step S20, the pad 41 of the movable template 4 fixes the inclined pull block 12, and moves the middle plate 42 and the top plate 43 towards the fixed template 3 at the same time, and the middle plate 42 pushes the threaded petal block 11 to make a linear movement inwardly contracting along the side wall of the inclined pull block 12.

[0053] In this embodiment, the pad 41 of the movable template 4 fixes the inclined pull block 12, and the middle plate 42 and the top plate 43 are moved simultaneously in the direction close to the fixed template 3, so that a relative displacement can be generated between the thread petal block 11 and the inclined pull block 12. At this time, the middle plate 42 will push the thread petal block 11 to make a linear movement inward along the side wall of the inclined pull block 12, and the two thread petal blocks 11 will approach the axis of the truncated cone structure 1 at the same time, causing the spacing between the two thread petal blocks 11 to gradually decrease, so that the external thread 111 of the thread petal block 11 is gradually separated from the tooth tip of the internal thread 51 of the nut 5 to be demolded, ensuring the smooth progress of the demolding process and will not cause damage to the tooth tip of the internal thread 51 of the nut 5 to be demolded.

[0054] Further, in one embodiment, the step of the middle plate 42 pushing the threaded petal block 11 to perform an inwardly contracting linear motion along the side wall of the inclined pull block 12 includes:

[0055] During the movement, the middle plate 42 pushes the hanging platform 113 of the threaded petal block 11, and the guide rail 122 of the threaded petal block 11 slides in the slide groove 112 of the inclined pull block 12, so that the threaded petal block 11 makes a linear movement inwardly contracting along the rear end of the side wall of the inclined pull block 12 toward the front end.

[0056] In this embodiment, the above technical solution is adopted to enable the threaded petal block 11 to achieve inward contraction movement in a relatively simple and efficient manner, without the need for a complex transmission mechanism or additional components. This not only reduces the complexity of the overall structure, but also reduces the manufacturing cost and maintenance difficulty. Moreover, the operator can achieve the contraction of the threaded petal block 11 by simply controlling the movement of the intermediate plate 42, which greatly simplifies the operation process. In addition, the coordinated use of the guide rail 122 and the slide groove 112 can ensure the stability and accuracy of the threaded petal block 11 during the movement process, reducing the error and wear caused by unstable movement.

[0057] Step S30, until the middle plate 42 and the top plate 43 move to the second preset distance, the external thread 111 of the threaded petal block 11 is completely separated from the internal thread 51 of the nut 5 to be demolded, and the top plate 43 is displaced by a third preset distance in the direction close to the fixed mold plate 3, so that the nut 5 to be demolded outside the top plate 43 is detached.

[0058] In this embodiment, until the middle plate 42 and the top plate 43 move the second preset distance, the external thread 111 of the threaded petal block 11 is completely separated from the internal thread 51 of the nut 5 to be demolded. After the complete separation, the top plate 43 is moved toward the fixed mold plate 3 by the third preset distance, and the inertia brought by the movement of the top plate 43 is used to drive the nut 5 to be demolded outside the top plate 43 to move synchronously, and make it free to detach under the action of gravity. It should be noted that the second preset distance and the third preset distance are calculated in advance according to the size of the nut 5.

[0059] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0060] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0061] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A processing core for a nut having a spaced internal thread, characterized in that: include: The two threaded petals (11) have outer walls which are both arc surfaces, and the front end of the outer wall is provided with an external thread (111), the external thread (111) is used to form the internal thread (51) of the nut (5), the inner wall of the threaded petal (11) is an inclined surface, and the inclined surface is provided with a sliding groove (112) from the rear end to the front end, and the rear end of the outer wall of the threaded petal (11) is provided with a hanging platform (113); The inclined pull block (12) is arranged between two threaded petal blocks (11) and forms a truncated cone structure (1) with the two threaded petal blocks (11), and the inclined surface of the threaded petal block (11) gradually approaches the axis of the truncated cone structure (1) from the rear end to the front end, the side wall of the inclined pull block (12) connected to the external thread (111) of the threaded petal block (11) is a smooth arc surface (121), and the smooth arc surface (121) is slightly higher than the external thread (111), a group of side walls of the inclined pull block (12) are respectively fitted with the inner walls of the two threaded petal blocks (11), and the side wall of the inclined pull block (12) is provided with a guide rail (122) slidably arranged in the slide groove (112).

2. The processing core of the nut with spaced internal threads according to claim 1, characterized in that: The slide groove (112) is centrally arranged on the inclined surface, the guide rail (122) is centrally arranged on the side wall of the inclined pull block (12), and the side wall of the guide rail (122) is recessed inwardly to form an acute angle with the side wall of the inclined pull block (12).

3. The processing core of the nut with spaced internal threads according to claim 2, characterized in that: A clearance groove (123) is provided at the included angle of the acute angle.

4. The processing core of the nut with spaced internal threads according to claim 1, characterized in that: The front end surface of the truncated cone structure (1) is also provided with a boss structure (2), and the boss structure (2) comprises a first protrusion (21) protruding from the front end surfaces of the two threaded petal blocks (11) respectively, and a second protrusion (22) protruding from the front end surface of the inclined pull block (12).

5. The processing core of the nut with spaced internal threads according to claim 4, characterized in that: The cross-sectional area of ​​the boss structure (2) is smaller than the cross-sectional area of ​​the truncated cone structure (1).

6. The processing core of the nut with spaced internal threads according to claim 4, characterized in that: A limiting groove (1121) is also provided at the bottom of the slide groove (112) of the threaded petal block (11), the length of the limiting groove (1121) is shorter than the length of the slide groove (112), and the front end of the limiting groove (1121) is flush with the front end of the slide groove (112), and a limiting block (23) is provided on the front end surface of the second protrusion (22), the two ends of the limiting block (23) extend to the side wall of the second protrusion (22), and the extended part cooperates with the limiting groove (1121) to limit the travel of the threaded petal block (11).

7. The processing core of the nut with spaced internal threads according to claim 4, characterized in that: A plurality of water transport holes (124) are provided on the side wall of the inclined pull block (12) connected to the external thread (111) of the threaded petal block (11), and on the front end surface of the second protrusion (22).

8. A processing mold, characterized in that: include: Fixed template (3); A movable template (4) is engaged with the fixed template (3) to form a cavity, wherein a processing core of a nut (5) with spaced internal threads as described in any one of claims 1 to 7 is arranged in the cavity, and a gap is left between the front end of the processing core and the fixed template (3), the movable template (4) comprises a pad (41), an intermediate plate (42) and a top plate (43), which are connected in sequence, the rear end of the inclined pull block (12) is fixed to the pad (41), the intermediate plate (42) is provided with a notch for accommodating a hanging platform (113) of the threaded petal block (11), the edge of the hanging platform (113) is gap-matched with the notch, and the external thread (111) of the threaded petal block (11) is protruding from the top plate (43).

9. A demoulding method for a processing mold according to claim 8, characterized in that the steps include: During demoulding, the movable mold plate (4) is moved in a direction away from the fixed mold plate (3) to a first preset distance; The pad (41) of the movable template (4) fixes the inclined pull block (12) to remain stationary, and the middle plate (42) and the top plate (43) are simultaneously moved in a direction close to the fixed template (3), and the middle plate (42) pushes the threaded petal block (11) to perform a linear movement of inward contraction along the side wall of the inclined pull block (12); When the middle plate (42) and the top plate (43) move to a second preset distance, the external thread (111) of the threaded petal block (11) is completely separated from the internal thread (51) of the nut (5) to be demoulded, and the top plate (43) is moved to a third preset distance in a direction close to the fixed mold plate (3), so that the nut (5) to be demoulded outside the top plate (43) is detached.

10. The demoulding method of a processing mold according to claim 9, characterized in that: The step of the middle plate (42) pushing the threaded petal block (11) to perform inwardly contracting linear motion along the side wall of the inclined pull block (12) comprises: During the movement, the intermediate plate (42) pushes the hanging platform (113) of the threaded petal block (11), and causes the guide rail (122) of the threaded petal block (11) to slide in the slide groove (112) of the inclined pull block (12), so that the threaded petal block (11) performs a linear movement of inward contraction from the rear end to the front end along the side wall of the inclined pull block (12).

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