Lower die core fixing device of button sewing machine

Abstract

The technical scheme belongs to the technical field of button sewing machines, and particularly relates to a lower die core fixing device of a button sewing machine. The lower module is movably arranged on the lower die base, an elastic piece I is arranged between the lower module and the lower die base, the elastic force of the elastic piece I enables the lower module to move away from the lower die base, and a material preparation hole is formed in the lower module; the upper end of the lower die connecting rod penetrates through the equipment material hole, and the lower die block is provided with a material passing groove communicated with the material preparation hole; each fixed installation mechanism comprises a lower sliding block, a fixed installation clamping piece and a second elastic piece, the second elastic pieces are arranged between the lower sliding blocks and the lower die base, and the second elastic pieces abut against the fixed installation clamping pieces; the lower module and the lower sliding block are respectively provided with a guide surface I and a guide surface II, and the lower module can move between a first position and a second position: at the first position, the bottom buckle enters the material preparation hole through the trough and is arranged at the top end of the lower die connecting rod; when moving to the second position, the two guide surfaces are matched to push the fixed mounting mechanism to move outwards; when the module reaches the second position, the bottom buckle is exposed from the upper end opening of the preparation hole.

Description

Technical Field

[0001] This technical solution relates to the field of button attaching machine technology, and specifically refers to a lower mold core fixing device for a button attaching machine. Background Technology

[0002] A button-attaching machine is an automated sewing device specifically designed for attaching buttons to fabrics such as clothing and bags. It ensures durability by feeding, positioning, and sewing the buttons, using lockstitch or chain stitch. It can accommodate various types of buttons, including flat buttons and buttonhole buttons.

[0003] For example, Chinese patent CN203073026U discloses a fully automatic button feeding and attaching machine, including a machine head, a main cylinder, a central button control device, a front button circulation device, and a bottom button circulation device. The bottom button circulation device includes a machine head base, a tail cylinder, a bottom button push rod, a bottom button track support, a bottom button track, a bottom button mold, and a bottom button adjusting nut. The bottom button is fed into the adjustable bottom button track under the action of the bottom button track. The bottom button enters the base push rod, and under the action of the tail cylinder, the bottom button is fed into the bottom button mold. The central cylinder in the front button circulation device pushes the front button into the button mold with the button gripping ability. After the bottom button push rod retracts, the corresponding position of the garment is placed between the bottom button mold and the button mold. The main cylinder presses the garment so that the button and the bottom button are attached to the garment.

[0004] The aforementioned fully automatic button feeding machine automatically feeds bottom buttons onto the bottom button mold via a bottom button track. However, due to the assembly gap between the bottom button track and the positioning area of ​​the bottom button mold, and the vibration interference when the main cylinder drives the button mold to press down, the bottom buttons are prone to radial displacement in the initial stage of stamping. This makes it difficult to compensate for dynamic positioning errors, resulting in excessive deviations in subsequent riveting positions. This can easily cause the lower die button to tilt, reduce riveting strength, and cause abnormal wear of the mold, thereby reducing the yield rate and affecting production quality. This needs to be improved. Summary of the Invention

[0005] This technical solution aims to improve the problem of poor production quality caused by the difficulty in compensating for dynamic positioning errors and riveting position deviations in bottom buckle molds due to assembly gaps and vibration interference. It provides a core-fixing device for the lower mold of a buckle attaching machine.

[0006] The purpose of this technical solution is achieved as follows:

[0007] A lower mold core-setting device for a button-attaching machine, comprising:

[0008] Lower mold base;

[0009] The lower module is movably mounted on the lower mold base. An elastic element is provided between the lower module and the lower mold base. The elastic force of the elastic element causes the lower module to tend to move away from the lower mold base. The lower module is provided with a material preparation hole.

[0010] A lower die connecting rod, an upper end of the lower die connecting rod is arranged in the material preparation hole, the lower die module is provided with a material passing groove, the material passing groove is communicated between the material preparation hole and the outside;

[0011] At least two positioning mechanisms are movably arranged on the lower die seat, the positioning mechanism comprises a lower slide block sliding on the lower die seat, a positioning clamp sliding on the lower slide block, and a second elastic member arranged on the lower slide block, the second elastic member is located between the corresponding lower slide block and the lower die seat, and the second elastic member abuts against the positioning clamp, so that the corresponding lower slide block has a tendency to slide close to the lower die module;

[0012] The lower die module has a guide surface one, the lower slide block correspondingly has a guide surface two, and the lower die module is movable between a first position and a second position; when the lower die module is at the first position, the bottom buckle enters the material preparation hole through the material passing groove and is placed on the upper end of the lower die connecting rod; in the process of moving the lower die module to the second position, the lower die module pushes the positioning mechanism to move away from the lower die module through the guidance of the guide surface one and the guide surface two; when the lower die module is at the second position, the bottom buckle is exposed from the upper end opening of the material preparation hole.

[0013] Through the above technical scheme, when the lower die core positioning device of the button sewing machine is normally used, the first elastic member lifts the lower die module to the first position in the initial state, the bottom buckle enters the material preparation hole through the material passing groove and is placed on the upper end of the lower die connecting rod, and each positioning mechanism located on the periphery stably clamps and positions the bottom buckle through the clamping end of the positioning clamp; when the equipment operates the riveting operation, the lower die module moves to the second position under the pressure, the lower die module pushes the lower slide blocks on the periphery out through the inclined surface by abutting against the guide surface two through the guide surface one, so that the positioning clamp avoids synchronously, in the process of moving the lower die module downward, the bottom buckle is gradually exposed from the upper end opening of the material preparation hole, the first elastic member continuously provides a reverse buffer force to offset vibration interference in the riveting stage, realizes the smooth transition of the bottom buckle from clamping to releasing, reduces the deviation of the riveting position, improves the riveting accuracy, and effectively improves the product qualification rate.

[0014] Preferably, the side wall of the lower die module is provided with a clamping channel corresponding to the positioning mechanism, and the clamping channel is communicated with the material preparation hole.

[0015] Through the above technical scheme, the clamping channel provided in the side wall of the lower die module provides a directional movement path for the positioning clamp, the clamping head of the positioning clamp extends into the material preparation hole through the clamping channel, and rigid clamping of the bottom buckle is realized.

[0016] Preferably, the positioning clamp comprises:

[0017] The fixed mounting clamp is arranged in sliding mode on the corresponding lower sliding block, the sliding direction of the lower sliding block is parallel to the sliding direction of the lower module, the fixed mounting clamp comprises a clamping head, a guide rod and a limiting block, the lower sliding block is provided with a guide hole, the guide rod penetrates through the guide hole, the clamping head and the limiting block are respectively connected to two ends of the guide rod, and the clamping head extends into the material preparation hole.

[0018] An elastic reset member is sleeved on the corresponding guide rod, one end of the elastic reset member abuts against the lower sliding block, and the other end abuts against the corresponding lower end surface of the clamping head, and the elastic reset member has a tendency to move away from the lower sliding block due to the elastic force.

[0019] Through the above technical solution, when riveting, the lower module moves downward, the lower module presses the clamping head of each fixed mounting clamp, the guide rod slides downward along the guide hole by overcoming the elastic force of the elastic reset member, the limiting block is arranged at the lower end of the guide rod to limit the guide rod from disengaging from the guide hole, the trajectory of the clamping head is accurately controlled and quickly reset, the elastic buffer avoids rigid collision with the fixed mounting clamp, and the smoothness and reliability of the clamping-release action are further improved.

[0020] Preferably, the end of the guide rod is provided with a clamping groove for clamping the upper part of the bottom buckle.

[0021] Through the above technical solution, when the bottom buckle is placed, the upper part of the bottom buckle is accurately clamped by the clamping groove of the fixed mounting clamp, and the horizontal deviation of the bottom buckle during assembly is further avoided.

[0022] Preferably, the lower module seat is provided with a boss portion, the lower sliding block abuts against the corresponding boss portion, the boss portion is provided with a clearance groove, the limiting block is movably arranged in the clearance groove, and the boss portion has a clearance surface corresponding to the first guide surface.

[0023] Through the above technical solution, after the lower module pushes away the lower sliding blocks on both sides, the lower module approaches the boss portion, the inclination direction and angle of the clearance surface are matched with the first guide surface, the clearance surface is opposite to the first guide surface, the rigid collision between the boss portion and the lower module is reduced, and the service life is prolonged.

[0024] Preferably, the lower sliding block is provided with a guide shaft, and the lower module seat is provided with a through hole, and the guide shaft penetrates through the through hole.

[0025] Through the above technical solution, the lower sliding block constitutes a guide pair by penetrating through the through hole through the guide shaft, the guide shaft slides linearly along the through hole, the transverse deviation is reduced, and the sliding stability is improved.

[0026] Preferably, the side wall of the lower sliding block is provided with a clamping groove one, the lower module seat is provided with a clamping groove two at the corresponding position, and the elastic member two is embedded into the clamping groove one and the clamping groove two at two ends respectively.

[0027] Through the technical scheme, the elastic member two is clamped into the lower slide block clamping groove one and the lower die base clamping groove two at two ends respectively, directional constraint is formed, the clamping grooves on two sides cooperate to limit the transverse deformation or deviation of the elastic member two, and stability is further improved.

[0028] Preferably, the lower slide block is provided with a first avoiding groove for embedding the clamping head, and the lower die module is provided with a second avoiding groove for embedding the elastic reset member.

[0029] Through the technical scheme, the lower slide block moves out during riveting, the first avoiding groove cooperates with the second avoiding groove to provide avoidance for the retreat of the clamping head, collision with the lower die module is avoided, the second avoiding groove provides a containing space after compression of the elastic reset member, and the risk of jamming caused by motion interference is eliminated.

[0030] Preferably, the lower die connecting rod is provided with a positioning groove for embedding the lower part of the bottom buckle.

[0031] Through the technical scheme, when the bottom buckle is placed, the lower part thereof is embedded into the positioning groove of the lower die connecting rod to limit the vertical reference position.

[0032] The technical scheme has the following prominent and beneficial technical effects compared with the prior art:

[0033] 1. The technical scheme synchronously pushes away the lower slide block to release clamping when the lower die module is riveted, orderly avoidance is formed in cooperation with the elastic member two, the top part of the bottom buckle is completely exposed to the upper end opening of the material preparation hole during the downward movement of the lower die module, vibration interference is offset in combination with elastic buffering, stable transition of the bottom buckle from clamping to releasing is completed while the positioning stability of the lower die connecting rod is maintained, riveting deviation is effectively reduced, and product qualification rate is improved.

[0034] 2. The technical scheme forms a hard contact displacement transmission mechanism through the inclined surface or curved surface structure of the guide surface one of the lower die module extruding the guide surface two of the lower slide block, forces the lower slide block to move out along the preset track, synchronously drives the fixed clamping member to exit the clamping state, and ensures displacement transmission accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0036] Figure 2 It is a schematic diagram of the overall structure of the embodiment; Figure 1 It is a partial cross-sectional schematic diagram;

[0037] Figure 3 It is a partial exploded schematic diagram of the lower die base and the lower die module in the embodiment;

[0038] Figure 4 It is a partial exploded schematic diagram of the fixed mounting mechanism in the embodiment;

[0039] Figure 5 It is a schematic diagram of the overall structure of the embodiment;Figure 1 The schematic diagram of the operation structure of the bottom buckle ejection;

[0040] Figure 6 For the embodiment Figure 5 The schematic diagram of the partial section view.

[0041] Reference signs: 1, lower die seat; 2, lower die block; 3, positioning mechanism; 31, lower sliding block; 32, positioning clamping piece; 321, positioning clamp; 3211, clamping head; 3212, guide rod; 3213, limiting block; 322, elastic reset piece; 33, elastic piece two; 4, lower die connecting rod; 5, material preparation hole; 6, elastic piece one; 7, clamping channel; 8, positioning groove; 9, clamping groove; 10, guide surface one; 11, guide surface two; 12, material passing groove; 13, boss part; 14, accommodation groove; 15, avoiding surface; 16, guide shaft; 17, through hole; 181, clamping groove one; 182, clamping groove two; 191, avoiding groove one; 192, avoiding groove two; 20, guide hole; 100, bottom buckle. DETAILED DESCRIPTION

[0042] The specific embodiments of the technical solution will be further described in detail below with reference to the drawings.

[0043] Embodiment:

[0044] Referring to Figure 1 , a lower die core positioning device of a button sewing machine, comprising a lower die seat 1, a lower die connecting rod 4 and a lower die block 2, the lower die block 2 is located above the lower die seat 1, the upper part of the lower die seat 1 is left with a space matching the lower part of the lower die block 2, the lower end of the lower die connecting rod 4 can be connected to the rack of the button sewing machine by penetrating through the lower die seat 1, the lower die block 2 is provided with a material preparation hole 5, which penetrates through the upper and lower side end faces of the lower die block 2 in the vertical direction, the hole diameter of the material preparation hole 5 should be greater than that of the bottom buckle 100; the elastic piece one 6 is arranged between the lower die block 2 and the lower die seat 1, which is preferably a reset spring, the elastic piece one 6 is sleeved on the lower die connecting rod 4, one end of the elastic piece one 6 abuts against the lower end face of the lower die block 2, and the other end can abut against the corresponding end face of the lower die seat 1 or penetrate through the lower die seat 1 to abut against the rack, the lower die block 2 is connected in sliding mode relative to the lower die seat 1, and the elastic force of the elastic piece one 6 makes the lower die block 2 have a tendency to move upward away from the lower die seat 1.

[0045] Referring to Figure 2 , Figure 3 and Figure 4The lower mold 2 is provided with a material passing groove 12, which is communicated to the material preparation hole 5 at one side and penetrates to the outside of the lower mold 2 at the other side, so that an opening is formed in the side wall of the lower mold 2. The lower mold connecting rod 4 is provided with a positioning groove 8 at the end of the end embedded in the material preparation hole 5. In the embodiment, the material passing groove 12 can be connected to the output end of the track of the automatic material loading bottom buckle 100. The bottom buckle 100 can be continuously loaded by the loading device. After the bottom buckle 100 is aligned and passes through the material passing groove 12, the lower part of the bottom buckle 100 is embedded in the positioning groove 8, so as to realize preliminary positioning.

[0046] The two positioning mechanisms 3 are respectively arranged on the opposite sides of the lower mold 2. Each positioning mechanism 3 comprises a lower sliding block 31, a positioning clamping piece 32 and an elastic piece two 33. The lower mold base 1 is provided with a boss portion 13 on the inner side of the lower mold base 1. The boss portion 13 is provided with two boss portions 13, which are arranged one by one corresponding to the two positioning mechanisms 3. The lower sliding blocks 31 on the two sides are located above the corresponding boss portions 13. The lower sliding block 31 is arranged to slide relative to the lower mold 2, and the sliding direction is perpendicular to the sliding direction of the lower mold 2. Each lower sliding block 31 is provided with two guide shafts 16 located on the rear side of the lower sliding block 31 close to the lower mold base 1. The lower mold base 1 is provided with a through hole 17 for the guide shaft 16 to pass through. The guide shaft 16 moves axially along the through hole 17, so that the guide shaft 16 corresponds to the sliding direction of the lower sliding block 31, thereby improving the stability of the sliding.

[0047] The elastic piece two 33 is preferably a reset spring. Each elastic piece two 33 is located between the corresponding lower sliding block 31 and the lower mold base 1. The lower sliding block 31 is provided with a clamping groove one 181 on the side wall of the side of the lower sliding block 31 provided with the guide shaft 16. The lower mold base 1 is provided with a clamping groove two 182 corresponding to the side wall. The clamping groove two 182 is aligned with the clamping groove one 181. The two ends of the elastic piece two 33 are respectively embedded in the clamping groove two 182 and the clamping groove one 181, and abut against the groove bottoms of the two clamping grooves. The elastic force of the elastic piece two 33 makes the lower sliding block 31 have a tendency to slide towards the lower mold 2. The two lower sliding blocks 31 on the two sides are close to each other in the opposite direction through the corresponding elastic piece two 33.

[0048] The lower module 2 is provided with clamping channels 7, two clamping channels 7 are respectively arranged on opposite sides of the lower module 2, and the two clamping channels 7 are arranged in one-to-one correspondence with two fixed clamping pieces 32. Each clamping channel 7 is in communication with the material preparation hole 5 to the outside of the lower module 2. Each fixed clamping piece 32 comprises a fixed clamping jig 321 and an elastic reset piece 322. The fixed clamping jig 321 is slidingly arranged on the corresponding lower slide block 31, and the sliding direction of the fixed clamping jig 321 is parallel to the sliding direction of the lower module 2. Each fixed clamping jig 321 comprises a clamping head 3211, a guide rod 3212 and a limiting block 3213. The lower slide block 31 is provided with a guide hole 20 which penetrates the lower slide block 31 in the vertical direction. The guide rod 3212 penetrates the guide hole 20. The clamping head 3211 is connected to the upper end of the guide rod 3212. The clamping head 3211 extends towards the corresponding clamping channel 7. The extension end of the clamping head 3211 has a clamping groove 9, and the groove wall is arc-shaped. The boss part 13 is provided with a clearance groove 14, and the limiting block 3213 is located in the clearance groove 14. The limiting block 3213 is connected to the lower end of the guide rod 3212 which penetrates the guide hole 20. The size of the limiting block 3213 is larger than the guide hole 20, so that the limiting block 3213 abuts against the lower slide block 31, and the guide rod 3212 is prevented from being pulled out of the guide hole 20 upward.

[0049] The elastic reset piece 322 is sleeved on the corresponding guide rod 3212. The upper end of the elastic reset piece 322 abuts against the lower end face of the corresponding clamping head 3211. Each lower slide block 31 is also provided with an avoiding groove 191 which is located on the side of the upper end of the upper slide block close to the lower module 2. The lower module 2 is provided with an avoiding groove 192 at the position corresponding to the avoiding groove 191. The lower end of the elastic reset piece 322 is embedded in the corresponding avoiding groove 191 and abuts against the groove bottom of the avoiding groove 191. The elastic force of the elastic reset piece 322 makes the fixed clamping jig 321 move in the axial direction, so that the fixed clamping jig 321 has a tendency to move upward away from the lower slide block 31, and the clamping head 3211 can be embedded in the avoiding groove 192.

[0050] The lower module 2 has a guide surface 10 which is arranged on opposite sides of the lower module 2. The guide surface 10 is an inclined end surface. The inclined directions of the two guide surfaces 10 make the lower part of the lower module 2 taper towards the lower seat 1. The two lower slide blocks 31 have guide surfaces 11 which are inclined end surfaces. The guide surfaces 11 are matched with the guide surfaces 10. The two guide surfaces 11 are arranged in one-to-one correspondence with the two guide surfaces 10. The boss parts 13 have avoiding surfaces 15. The guide surfaces 11 are matched with the guide surfaces 10. The two avoiding surfaces 15 are arranged in one-to-one correspondence with the two guide surfaces 10. The guide surfaces 10, the guide surfaces 11 and the avoiding surfaces 15 can be flat or arc-shaped.

[0051] Referring to Figure 5 and Figure 6, the bottom buckle 100 generally includes two parts of a buckle disc and a thinner buckle pin, the lower module 2 can move between the first position and the second position, when the lower module 2 is located at the first position, in the feeding stage of the bottom buckle 100, the bottom buckle 100 enters the standby hole 5 through the feeding slot 12, the buckle disc of the bottom buckle 100 is embedded into the positioning groove 8 at the upper end of the lower die connecting rod 4, and is preliminarily positioned, the lower slide blocks 31 on both sides drive the positioning clamps 321 on both sides to move close to each other, so that the clamping heads 3211 of the positioning clamps 321 on both sides clamp the buckle pins of the bottom buckle 100, and the buckle pins are limited in the clamping grooves 9 on both sides and are positioned.

[0052] In the process of moving the lower module 2 to the second position, the lower module 2 is subjected to pressure from above, moves axially downward along the lower die connecting rod 4, approaches the lower die seat 1, and compresses the elastic member one 6; the lower module 2 presses against the clamping heads 3211 on both sides, the clamping heads 3211 are embedded into the avoidance groove one 191, the clamping heads 3211 move downward correspondingly, and the elastic reset members 322 are compressed in the avoidance groove two 192; the lower module 2 abuts against the guide surface two 11 through the guide surface one 10 to drive the lower slide blocks 31 on both sides, the lower slide blocks 31 on both sides slide away in directions away from each other, compress the corresponding elastic member two 33, the clamping heads 3211 on both sides are separated from the clamping and positioning of the bottom buckle 100, and the bottom buckle 100 can be exposed from the upper end opening of the standby hole 5.

[0053] The specific working process of the scheme is as follows:

[0054] The technical scheme realizes dynamic positioning compensation through the elastic cooperation of the lower die seat 1 and the sliding lower module 2, in the initial state, the elastic member one 6 lifts the lower module 2 to the first position, the standby hole 5 is preloaded with the bottom buckle 100 carried by the lower die connecting rod 4, and the positioning clamping member 32 forms accurate clamping and positioning of the bottom buckle 100 by driving the lower slide blocks 31 to gather around the lower module 2 under the action of the elastic member two 33; during the riveting operation, the lower module 2 is subjected to pressure and moves downward to the second position, which synchronously drives the lower slide blocks 31 on both sides to move outward to overcome the resistance of the elastic member two 33 through the inclined surface structure or the lever structure, realizes the orderly avoidance of the clamping end, based on the fact that the bottom buckle 100 is placed on the lower die connecting rod 4 and the position of the lower die connecting rod 4 is fixed, the top of the bottom buckle 100 is completely exposed from the upper end opening of the standby hole 5 in the process of moving the lower module 2 downward, the elastic member one 6 continuously provides a reverse buffer force to offset vibration interference in the riveting stage, realizes the smooth transition of the bottom buckle 100 from clamping to releasing, reduces the deviation of the riveting position, improves the riveting accuracy, and effectively improves the product qualification rate.

[0055] The basic principle and main features of the technical solution and the advantages of the technical solution are shown and described above. Those skilled in the art should understand that the technical solution is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the technical solution. Without departing from the spirit and scope of the technical solution, various changes and improvements can be made to the technical solution, and these changes and improvements all fall within the scope of the claimed technical solution. The scope of protection of the technical solution is defined by the appended claims and their equivalents.

Claims

1. A lower mold core-setting device for a button-attaching machine, characterized in that, include: Lower mold base (1); The lower module (2) is movably mounted on the lower mold base (1). An elastic element (6) is provided between the lower module (2) and the lower mold base (1). The elastic force of the elastic element (6) causes the lower module (2) to have a tendency to move away from the lower mold base (1). The lower module (2) is provided with a material preparation hole (5). The lower mold connecting rod (4) has its upper end inserted into the material preparation hole (5). The lower module (2) is provided with a material passage groove (12), which connects the material preparation hole (5) to the outside. At least two mounting mechanisms (3) are movably mounted on the lower mold base (1). The mounting mechanism (3) includes a lower slide block (31) that slides on the lower mold base (1), a mounting clamping member (32) that slides on the lower slide block (31), and an elastic member (33) disposed on the lower slide block (31). The elastic member (33) is located between the corresponding lower slide block (31) and the lower mold base (1). The elastic member (33) abuts against the mounting clamping member (32), so that the corresponding lower slide block (31) has a tendency to slide closer to the lower module (2). The lower module (2) has a guide surface one (10), and the lower slider (31) has a corresponding guide surface two (11). The lower module (2) can move between a first position and a second position. When the lower module (2) is in the first position, the bottom buckle enters the material preparation hole (5) through the material passage (12) and is placed on the upper end of the lower mold connecting rod (4). During the process of the lower module (2) moving to the second position, the lower module (2) is guided by the guide surface one (10) and the guide surface two (11) to push the fixed assembly mechanism (3) to move away from the lower module (2). When the lower module (2) is in the second position, the bottom buckle is exposed at the upper opening of the material preparation hole (5).

2. The lower mold core-setting device for a button-attaching machine according to claim 1, characterized in that: The side wall of the lower module (2) is provided with clamping channels (7) corresponding to the mounting mechanism (3), and the clamping channels (7) are all connected to the material preparation hole (5).

3. The lower mold core-setting device for a button-attaching machine according to claim 2, characterized in that: The fixed clamping components (32) all include: A fixed fixture (321) is slidably disposed on the corresponding lower slide block (31). The sliding direction of the fixed fixture (321) is set to correspond to the sliding direction of the lower module (2). The fixed fixture (321) includes a clamping head (3211), a guide rod (3212), and a limiting block (3213). The lower slide block (31) is provided with a guide hole (20). The guide rod (3212) passes through the guide hole (20). The clamping head (3211) and the limiting block (3213) are respectively connected to the two ends of the guide rod (3212). The clamping end of the clamping head (3211) extends toward the material preparation hole (5). An elastic reset member (322) is sleeved on the corresponding guide rod (3212). The two ends of the elastic reset member (322) act on the opposite end faces of the lower slider (31) and the clamping head (3211), respectively. The elastic force of the elastic reset member (322) causes the fixed clamp (321) to have a tendency to slide away from the lower slider (31).

4. The lower mold core-setting device for a button-attaching machine according to claim 3, characterized in that: The end of the guide rod (3212) is provided with a clamping groove (9) for engaging the upper positioning of the bottom buckle (100).

5. The lower mold core-setting device for a button-attaching machine according to claim 3, characterized in that: The lower mold base (1) is provided with a boss (13), the lower slider (31) abuts against the corresponding boss (13), the boss (13) is provided with a relief groove (14), the limiting block (3213) is movably disposed in the relief groove (14), and the boss (13) has a relief surface (15) corresponding to the guide surface (10).

6. The lower mold core-setting device for a button-attaching machine according to claim 1, characterized in that: The lower slider (31) is provided with a guide shaft (16), and the lower mold base (1) is provided with a through hole (17), through which the guide shaft (16) passes.

7. The lower mold core-setting device for a button-attaching machine according to claim 1, characterized in that: The side wall of the lower slider (31) is provided with a snap-fit ​​groove 1 (181), and the lower mold base (1) is provided with a snap-fit ​​groove 2 (182) at the corresponding position. The two ends of the elastic element 2 (33) are respectively embedded in the snap-fit ​​groove 1 (181) and the snap-fit ​​groove 2 (182).

8. The lower mold core-setting device for a button-attaching machine according to claim 3, characterized in that: The lower slider (31) has a first clearance groove (191) for the clamping head (3211) to be inserted, and the lower module (2) has a second clearance groove (192) for the elastic reset member (322) to be inserted.

9. The lower mold core-setting device for a button-attaching machine according to claim 1, characterized in that: The lower mold connecting rod (4) has a positioning groove (8) for the bottom buckle (100) to be inserted into.

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