Cold heading forming process and forming module for flat position limit shaft
Through cold heading forming process and multi-mold forming technology, the problems of low production efficiency and poor finished product accuracy in the existing flat limit shaft preparation process are solved, and the effect of reducing production costs and improving production efficiency and accuracy is achieved.
Patent Information
- Application Number
- CN202510165702.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-04-04
AI Technical Summary
In the existing production process of flat limit shafts, the production efficiency is low and the finished product is poor, resulting in high production costs.
The cold heading forming process is adopted to cut the wire through the material cutting mechanism, and gradually shaping, extruding and forming is used to form a T-shaped structure with preformed flanges and rods, and then fine stamping is carried out to obtain a flat limit shaft.
One-time processing and forming are realized, milling processing methods are omitted, production costs are reduced, and production efficiency and final product accuracy are improved through assembly line action.
Smart Images
Figure CN119747529A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of flat position limiting shaft preparation, and in particular to a cold heading forming process and a forming module for a flat position limiting shaft. Background Art
[0002] The flat position limit shaft is a common connecting component in car seats. It is connected to other components through the head flange. Adding a flat position on the rod can prevent rotation during assembly and is more conducive to positioning during seat assembly. Therefore, the flat position limit shaft is more and more widely used in automobiles.
[0003] In the related art, flat limit shafts are mostly prepared by cold forging and milling, but this method has low production efficiency and poor precision of the final product, resulting in high production costs. Summary of the invention
[0004] Based on this, it is necessary to provide a cold heading forming process and forming module for a flat position limiting shaft which can reduce production costs and improve production efficiency and final product accuracy.
[0005] A cold heading forming process for a flat position limiting shaft, comprising:
[0006] Cut the wire to a set length through the shearing mechanism;
[0007] Putting the qualified wire material into a first mold, and shaping and chamfering the first end of the wire material;
[0008] Putting the wire material that has completed the first chamfering into a second die, and shaping and chamfering the second end of the wire material;
[0009] Putting the wire material after the second chamfering into a third mold, so that the wire material forms a T-shaped structure with a preformed flange and a rod, to obtain a first semi-finished product;
[0010] The first semi-finished product is placed in a fourth mold, and the end of the preformed flange away from the rod is pre-extruded to form a semi-positioning hole, and the end of the rod away from the preformed flange is flattened to form a flat position, thereby obtaining a second semi-finished product;
[0011] The second semi-finished product is placed in a fifth mold, the semi-positioning hole is finely stamped to form a positioning hole, and the preformed flange and the flat position are finely extruded to obtain a flat position limiting shaft.
[0012] In one embodiment, the preformed flange is a special-shaped structure.
[0013] In one of the embodiments, the cross-sectional shape of the positioning hole in the axial direction of the preformed flange includes an arc segment and straight line segments connected to both ends of the arc segment.
[0014] In one of the embodiments, there is a distance between the straight line segment and the center point of the positioning hole.
[0015] In one embodiment, the diameter of the positioning hole decreases first and then becomes equal in a direction from the preformed flange toward the rod portion.
[0016] In one embodiment, the diameter of the semi-positioning hole gradually decreases from the preformed flange toward the rod portion.
[0017] The present application also provides a forming module for cold heading forming process of the flat position limiting shaft as described above, comprising a shearing mechanism, a first die, a second die, a third die, a fourth die and a fifth die arranged in sequence;
[0018] The cutting mechanism is used to cut the wire material to a set length;
[0019] The first die is used to shape and chamfer the first end of the wire;
[0020] The second die is used to shape and chamfer the second end of the wire;
[0021] The third die is used to extrude the chamfered wire material so that the wire material forms a T-shaped structure with a preformed flange and a rod portion to obtain a first semi-finished product;
[0022] The fourth die is used to pre-extrude the end of the preformed flange away from the rod to form a semi-positioning hole, and to flatten the end of the rod away from the preformed flange to form a flat position, thereby obtaining a second semi-finished product;
[0023] The fifth die is used for fine stamping the semi-positioning hole to form the positioning hole, and for fine extrusion of the preformed flange and the flat position to obtain the flat position limiting shaft.
[0024] In one embodiment, the first mold, the second mold, the third mold, the fourth mold and the fifth mold all include a main mold, a punch mold and a driving member, and an extrusion cavity for placing the wire is formed in the main mold; the driving member can drive the main mold and the punch mold to move closer to or away from each other; a punch is provided at one end of the punch mold, and the punch can extend into the extrusion cavity to extrude the wire.
[0025] In one embodiment, the extrusion cavities of the first mold, the second mold, the third mold, the fourth mold, and the fifth mold are all different.
[0026] In one embodiment, the main molds of the first mold, the second mold, the third mold, the fourth mold and the fifth mold further include a movably arranged ejector head, and the ejector head can extend into the extrusion cavity to eject the wire.
[0027] In the above scheme, the flat limit shaft is prepared by adopting the cold heading forming process, which can achieve one-time processing and forming, omitting the milling process, reducing the production cost, and using different molds for the corresponding cold heading process to realize the assembly line effect, thereby improving production efficiency and the final product accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.
[0029] 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.
[0030] Figure 1 This is a diagram showing the changes of the flat position limiting shaft in steps S2 to S6 in the cold heading forming process of the flat position limiting shaft shown in one embodiment of the present application.
[0031] Figure 2 This is a cross-sectional structural diagram of the first mold shown in an embodiment of the present application when processing wire.
[0032] Figure 3 This is a cross-sectional structural diagram of the second mold shown in an embodiment of the present application when processing wire.
[0033] Figure 4 This is a cross-sectional structural diagram of the third mold shown in an embodiment of the present application when processing wire.
[0034] Figure 5 This is a cross-sectional structural diagram of the fourth mold shown in an embodiment of the present application when processing wire.
[0035] Figure 6 This is a cross-sectional structural diagram of the fifth mold shown in an embodiment of the present application when processing wire.
[0036] Figure 7It is a schematic structural diagram of a flat position limiting shaft shown in one embodiment of the present application.
[0037] Reference numerals:
[0038] 10. Flat position limit shaft; 100. Preformed flange; 200. Rod; 300. Positioning hole; 400. Flat position; 500. Wire; 600. Main mold; 610. Head; 620. Extrusion model; 621. Inner model; 622. Outer model; 630. Second shell; 640. Second rear gasket; 700. Die; 710. Punch; 720. First rear gasket; 730. First shell; 740. Push tube; 750. Spring. DETAILED DESCRIPTION
[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0040] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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.
[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0042] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0043] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0045] See also Figure 1 and Figure 7 The embodiment of the present application relates to a cold heading forming process of a flat position limiting shaft, comprising the following steps:
[0046] S1. Cutting the wire 500 to a set length by the cutting mechanism. Specifically, the wire 500 is a cylindrical structure. It should be noted that the length of the wire 500 is not specifically limited in this application and can be set according to the use requirements.
[0047] S2, placing the qualified wire 500 into the first die, and shaping and chamfering the first end of the wire 500. By shaping and chamfering the first end of the wire 500 through the first die, burrs on the first end can be removed, thereby eliminating the influence of the burrs on the final product.
[0048] S3, placing the wire 500 that has completed the first chamfering into the second mold, and shaping and chamfering the second end of the wire 500. In specific implementation, the wire 500 that has completed the first chamfering can be turned over and then placed into the second mold. Specifically, the first end of the wire 500 is arranged opposite to the second end of the wire 500.
[0049] The second end of the wire 500 is shaped and chamfered by the second die, so that the burrs on the second end can be removed, thereby eliminating the influence of the burrs on the final product.
[0050] S4, placing the wire 500 after the second chamfering into the third mold, so that the wire 500 forms a T-shaped structure with a preformed flange 100 and a rod 200, so as to obtain a first semi-finished product. Specifically, the preformed flange 100 and the rod 200 are both cylindrical structures, and the diameter of the preformed flange 100 is greater than the diameter of the rod 200. The preformed flange 100 and the rod 200 are an integrally formed structure.
[0051] S5. Place the first semi-finished product into the fourth mold, pre-extrude the end of the preformed flange 100 away from the rod 200 to form a semi-positioning hole 300, and flatten the end of the rod 200 away from the preformed flange 100 to form a flat position 400, thereby obtaining a second semi-finished product.
[0052] By setting the semi-positioning hole 300 , a good foundation can be laid for preparing the positioning hole 300 in the next step, so as to ensure the accuracy of the final positioning hole 300 .
[0053] S6. Place the second semi-finished product into the fifth mold, perform precision stamping on the semi-positioning hole 300 to form the positioning hole 300, and perform precision extrusion on the preformed flange 100 and the flat position 400 to obtain the flat position limiting shaft 10.
[0054] By adopting the cold heading process to prepare the flat limit shaft 10, one-time processing and forming can be achieved, the milling process is omitted, and the production cost is reduced. Different molds are used for the corresponding cold heading process to achieve the assembly line effect, thereby improving production efficiency and final product accuracy.
[0055] See also Figure 1 and Figure 7 According to some embodiments of the present application, the preformed flange 100 is optionally a special-shaped structure. Specifically, a lug is formed on the outer wall of the preformed flange 100, and the number of the lugs is two. The two lugs are symmetrically arranged relative to the central axis of the preformed flange 100.
[0056] The cross-sectional shape of the outer wall of the lug in the axial direction of the preformed flange 100 is an arc shape, and the center of the outer wall of the lug coincides with the center of the preformed flange 100 .
[0057] See also Figure 1 and Figure 7 According to some embodiments of the present application, optionally, the cross-sectional shape of the positioning hole 300 in the axial direction of the preformed flange 100 includes an arc segment and straight line segments connected to both ends of the arc segment. Specifically, there is a distance between the straight line segment and the center point of the positioning hole 300.
[0058] More specifically, the arc segment has a third end and a fourth end that are arranged opposite to each other, the line between the third end and the center point of the positioning hole 300 is the first connecting segment, and the line between the fourth end and the center point of the positioning hole 300 is the second connecting segment. The angle between the first connecting segment and the second connecting segment is less than 180°.
[0059] By providing the positioning hole 300 , it is possible to facilitate the positioning and installation of other parts and the flat position limiting shaft 10 .
[0060] See also Figure 1 and Figure 7 According to some embodiments of the present application, optionally, the diameter of the positioning hole 300 decreases first and then becomes equal from the preformed flange 100 toward the rod 200. The diameter of the semi-positioning hole 300 gradually decreases from the preformed flange 100 toward the rod 200.
[0061] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The present application also provides a forming module for cold heading forming process of a flat position limiting shaft, comprising a shearing mechanism, a first die, a second die, a third die, a fourth die and a fifth die arranged in sequence, wherein the shearing mechanism is used to cut a wire 500 of a set length. The first die is used to shape and chamfer the first end of the wire 500. The second die is used to shape and chamfer the second end of the wire 500.
[0062] The third die is used to extrude the chamfered wire 500 so that the wire 500 forms a T-shaped structure with a preformed flange 100 and a rod 200, thereby obtaining a first semi-finished product. The fourth die is used to pre-extrude the end of the preformed flange 100 away from the rod 200 to form a semi-positioning hole 300, and to flatten the end of the rod 200 away from the preformed flange 100 to form a flattened position 400, thereby obtaining a second semi-finished product.
[0063] The fifth mold is used to perform precision stamping on the semi-positioning hole 300 to form the positioning hole 300 , and to perform precision extrusion on the preformed flange 100 and the flat position 400 to obtain the flat position limiting shaft 10 .
[0064] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 According to some embodiments of the present application, optionally, the first die, the second die, the third die, the fourth die and the fifth die all include a main die 600, a punch die 700 and a driving member, and an extrusion cavity for placing the wire 500 is formed in the main die 600. The driving member can drive the main die 600 and the punch die 700 to move closer to or away from each other. A punch 710 is provided at one end of the punch die 700, and the punch 710 can extend into the extrusion cavity to extrude the wire 500.
[0065] Specifically, in one embodiment, the driving member can drive the punch die 700 to move in a direction close to the main die 600 , so that the punch 710 can be extended into the extrusion cavity to extrude the wire 500 .
[0066] In another embodiment, the driving member can simultaneously drive the main die 600 and the punch die 700, so that the main die 600 and the punch die 700 are close to each other, so that the punch 710 can be inserted into the extrusion cavity to extrude the wire 500. By enabling the driving member to simultaneously drive the main die 600 and the punch die 700, the processing speed can be increased.
[0067] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 According to some embodiments of the present application, optionally, the extrusion cavities of the first die, the second die, the third die, the fourth die, and the fifth die are all different. Specifically, the shape of the extrusion cavity in the first die is adapted to perform shaping and chamfering on the first end of the wire 500 in step S2. The shape of the extrusion cavity in the first die is adapted to perform shaping and chamfering on the second end of the wire 500 in step S3.
[0068] The extrusion cavity in the third die is adapted to extrude the chamfered wire 500 in step S4 , so that the wire 500 forms a T-shaped structure having a preformed flange 100 and a stem 200 .
[0069] The extrusion cavity in the fourth mold is adapted to pre-extrude the end of the preformed flange 100 away from the rod 200 in step S5 to form a semi-positioning hole 300, and to flatten the end of the rod 200 away from the preformed flange 100 to form a flat position 400.
[0070] The extrusion cavity in the fifth die is adapted to perform precision stamping on the semi-positioning hole 300 in step S6 to form the positioning hole 300 , and to perform precision extrusion on the preformed flange 100 and the flat part 400 .
[0071] See also Figure 2, Figure 3 , Figure 4 , Figure 5 and Figure 6 According to some embodiments of the present application, optionally, the punch 700 of the first mold, the second mold, the third mold, the fourth mold, and the fifth mold further includes a first rear pad 720 and a first shell 730, wherein a first accommodating chamber for accommodating the first rear pad 720 is formed in the first shell 730, and the first rear pad 720 is disposed in the first accommodating chamber, and one end of the punch 710 is connected to the first rear pad 720, and the other end of the punch 710 extends out of the first shell 730. The other end of the punch 710 can abut against the wire 500.
[0072] By setting the first rear pad 720, the first rear pad 720 can absorb and disperse the greater impact force generated when the punch 710 contacts the wire 500 during the extrusion process, thereby playing a buffering and shock-absorbing effect, and can reduce damage to the mold. The first rear pad 720 can enable the mold to maintain better stability during the working process, and enable the punch 710 to enter the extrusion cavity more accurately during extrusion, thereby ensuring the consistency and reliability of the extrusion process and reducing product quality problems caused by mold shaking or deviation.
[0073] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 According to some embodiments of the present application, optionally, the main mold 600 of the first mold, the second mold, the third mold, the fourth mold and the fifth mold further includes a movable head 610, an extrusion mold 620, a second shell 630 and a second rear pad 640, and the head 610 can extend into the extrusion cavity to eject the wire 500. An extrusion cavity is formed in the extrusion mold 620.
[0074] The second housing 630 is formed with a second accommodating chamber for accommodating the second rear pad 640 and a third accommodating chamber for accommodating the extrusion model 620. The second accommodating chamber is connected to the third accommodating chamber, and the second accommodating chamber is located below the third accommodating chamber. The second rear pad 640 is disposed in the second accommodating chamber. The extrusion model 620 is disposed in the third accommodating chamber, and the extrusion model 620 can abut against the second rear pad 640.
[0075] By setting the second rear pad 640, the second rear pad 640 can absorb and disperse the greater impact force generated when the punch 710 contacts the wire 500 during the extrusion process, thereby playing a buffering and shock-absorbing effect, and can reduce damage to the mold. The second rear pad 640 can enable the mold to maintain better stability during the working process, and enable the punch 710 to enter the extrusion cavity more accurately during extrusion, thereby ensuring the consistency and reliability of the extrusion process and reducing product quality problems caused by mold shaking or deviation.
[0076] A through hole is provided in the middle of the second rear pad 640 and the extrusion mold 620, and the plug 610 is movably disposed in the through hole. By movably disposing the plug 610 in the through hole and driving the plug 610 to move, the plug 610 can be extended into the extrusion cavity to eject the processed wire 500, which is conducive to making the processed wire 500 more easily detachable from the extrusion cavity, and can improve the efficiency and quality of demoulding, so as to facilitate subsequent production operations.
[0077] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 According to some embodiments of the present application, optionally, the punch 700 of the fifth die further includes a punching tube 740 and a spring 750, the punching tube 740 is sleeved on the punch 710, and the punching tube 740 can extend into the extrusion cavity to extrude the wire 500, and the punch 710 of the fifth die protrudes out of the punching tube 740. Specifically, the punch 710 of the fifth die is used to perform fine stamping on the semi-positioning hole 300. The punching tube 740 is used to extrude the preformed flange 100.
[0078] The first rear pad 720 of the fifth mold includes an upper pad and a lower pad, and the upper pad and the lower pad both include a horizontal part and a vertical part perpendicular to the horizontal part, the vertical part of the upper pad abuts against the vertical part of the lower pad, and the spring 750 is sleeved on the vertical part of the upper pad and the vertical part of the lower pad, and abuts against the horizontal part of the upper pad and the horizontal part of the lower pad.
[0079] The extrusion model 620 of the fifth die includes an inner model 621 and an outer model 622 sleeved outside the inner model 621. The inner model 621 is made of tungsten steel, and the outer model 622 is made of a steel ring.
[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0081] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A cold heading forming process for a flat position limiting shaft, characterized in that: include: Cut the wire to a set length through the shearing mechanism; Putting the qualified wire material into a first mold, and shaping and chamfering the first end of the wire material; Putting the wire material that has completed the first chamfering into a second die, and shaping and chamfering the second end of the wire material; Putting the wire material after the second chamfering into a third mold, so that the wire material forms a T-shaped structure with a preformed flange and a rod, to obtain a first semi-finished product; The first semi-finished product is placed in a fourth mold, and the end of the preformed flange away from the rod is pre-extruded to form a semi-positioning hole, and the end of the rod away from the preformed flange is flattened to form a flat position, thereby obtaining a second semi-finished product; The second semi-finished product is placed in a fifth mold, the semi-positioning hole is finely stamped to form a positioning hole, and the preformed flange and the flat position are finely extruded to obtain a flat position limiting shaft.
2. The cold heading forming process of the flat position limiting shaft according to claim 1 is characterized in that: The preformed flange is a special-shaped structure.
3. The cold heading forming process of the flat position limiting shaft according to claim 1 is characterized in that: The cross-sectional shape of the positioning hole in the axial direction of the preformed flange includes an arc segment and straight line segments connected to both ends of the arc segment.
4. The cold heading forming process of the flat position limiting shaft according to claim 3 is characterized in that: There is a distance between the straight line segment and the center point of the positioning hole.
5. The cold heading forming process of the flat position limiting shaft according to claim 1 is characterized in that: The diameter of the positioning hole decreases first and then becomes equal in a direction from the preformed flange toward the rod portion.
6. The cold heading forming process of the flat position limiting shaft according to claim 1 is characterized in that: The diameter of the semi-positioning hole gradually decreases from the preformed flange toward the rod portion.
7. A forming module used in the cold heading forming process of the flat position limiting shaft according to any one of claims 1 to 6, characterized in that: It includes a shearing mechanism, a first mold, a second mold, a third mold, a fourth mold and a fifth mold which are arranged in sequence; The cutting mechanism is used to cut the wire material to a set length; The first die is used to shape and chamfer the first end of the wire; The second die is used to shape and chamfer the second end of the wire; The third die is used to extrude the chamfered wire material so that the wire material forms a T-shaped structure with a preformed flange and a rod portion to obtain a first semi-finished product; The fourth die is used to pre-extrude the end of the preformed flange away from the rod to form a semi-positioning hole, and to flatten the end of the rod away from the preformed flange to form a flat position, thereby obtaining a second semi-finished product; The fifth die is used for fine stamping the semi-positioning hole to form the positioning hole, and for fine extrusion of the preformed flange and the flat position to obtain the flat position limiting shaft.
8. The molding module according to claim 7, characterized in that: The first die, the second die, the third die, the fourth die and the fifth die all include a main die, a punch die and a driving member. An extrusion cavity for placing the wire is formed in the main die; the driving member can drive the main die and the punch die to move closer to or away from each other; a punch is provided at one end of the punch die, and the punch can extend into the extrusion cavity to extrude the wire.
9. The molding module according to claim 8, characterized in that: The extrusion cavities of the first mold, the second mold, the third mold, the fourth mold and the fifth mold are all different.
10. The molding module according to claim 8, characterized in that: The main molds of the first mold, the second mold, the third mold, the fourth mold and the fifth mold further include a movably arranged ejector head, and the ejector head can extend into the extrusion cavity to eject the wire.