Material receiving and die changing mechanism for button sewing machine

Abstract

The utility model belongs to the technical field of garment processing equipment, and particularly relates to a material receiving and die changing mechanism for a button sewing machine, which comprises a rack, a feeding fixing seat and a feeding channel, the receiving fixed seat is adjacent to the feeding fixed seat; the material receiving die is provided with a material receiving opening; a supporting pin, an elastic piece and a material taking part; the material receiving die is provided with a material receiving position, a material taking position and a die changing position, when the material receiving die is located at the material receiving position, the material receiving opening is aligned with the feeding channel, and materials enter the material receiving opening; when the material receiving die is located at the material taking position, the material taking part takes away the materials; when the material receiving die is located at the die changing position, the material receiving die can rotate and be taken out. The stroke from the material receiving position to the material taking position is L1, the stroke from the material receiving position to the die changing position is L2, and L1 < lt >; l2. The material receiving die can move downwards to the die replacing position under the action of external force, the material receiving die can rotate at the position and be taken out for replacement, the replacement operation is very simple and rapid, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of clothing processing equipment, in particular to a material joining and mould changing mechanism for a button sewing machine. Background Art

[0002] Button sewing machines are widely used in garment factories and leather bag processing enterprises. They are mainly used to attach various types of metal buttons to knitted garments, down jackets, jeans, shoes and hats, leather and other products.

[0003] A button sewing machine primarily consists of a loading and unloading device, as well as a stapling device. The loading and unloading devices are primarily used to load and unload buttons, and typically feature a receiving die. The buttons are transported to the receiving die by the loading device and then removed by the unloading device. The receiving die in existing button sewing machines has a complex mounting structure and is difficult to disassemble. Furthermore, since different button types and sizes require replacement of the receiving die with a corresponding size, replacing the receiving die is inconvenient. Utility Model Content

[0004] The utility model aims to provide a material splicing and die changing mechanism for a button sewing machine which has a simple structure and can quickly replace the material splicing die.

[0005] The purpose of this utility model is achieved in this way:

[0006] The utility model proposes a material receiving and die changing mechanism for a button sewing machine, which has the following characteristics: it is installed on a feeding and taking-up device of the button sewing machine, and comprises a frame, a feeding fixed seat, which is installed on the frame and has a feeding channel for conveying materials; a material receiving fixed seat, which is adjacent to the feeding fixed seat; a material receiving die, which is movably arranged on the material receiving fixed seat and has a receiving opening corresponding to the feeding channel and for receiving materials; a support pin, one end of which is installed on the material receiving fixed seat and the other end extends into the material receiving die for supporting the material located in the receiving opening; an elastic member, which is installed between the material receiving die and the material receiving fixed seat; and A material taking component is movably arranged on the frame and is used to take away the material located in the material receiving port; wherein, the material receiving die also has a material receiving position, a material taking position and a die changing position. When the material receiving die is in the material receiving position, the material receiving port is aligned with the material feeding channel, and the material enters the material receiving port; when the material receiving die is in the material taking position, the material taking component takes away the material; when the material receiving die is in the die changing position, the material receiving die can be rotated and taken out; the stroke from the material receiving position to the material taking position is L1, and the stroke from the material receiving position to the die changing position is L2, wherein L1 <L2。

[0007] The material receiving and die changing mechanism for a button sewing machine proposed in the present invention may also have the following features: a continuous limiting step and an avoidance step are provided in the height direction of the feeding fixed seat on the side facing the material receiving fixed seat, and a matching step is provided on the side of the material receiving mold facing the feeding fixed seat, and when the material receiving mold is in the material receiving position, the matching step is engaged with the limiting step under the elastic force of the elastic member; the material receiving mold can be moved down from the material receiving position along the support pin to the material receiving position under the pressure of the material picking component; when the material picking component leaves the material receiving mold with the material, the material receiving mold returns to the material receiving position under the action of the elastic member; when the material receiving mold moves down from the material receiving position along the support pin to the die changing position under the action of external force, the limiting step corresponds to the avoidance step.

[0008] In the material receiving and die changing mechanism for a button sewing machine proposed in the present invention, it can also have the following characteristics: the limiting step has a guide step surface arranged along the height direction, and correspondingly, the mating step has a guide mating step surface arranged along the height direction. When the material receiving mold is in the material receiving position or the material picking position, the guide step surface and the guide mating step surface are at least partially fitted together, and when the material receiving mold is in the die changing position, the guide step surface and the guide mating step surface are completely separated.

[0009] In the material splicing and mold changing mechanism for the button sewing machine proposed in the present invention, it can also have the following characteristics: the avoidance step has an avoidance step surface arranged along the height direction, and the length of the guide matching step surface along the height direction is smaller than the length of the avoidance step surface along the height direction.

[0010] In the material receiving and die changing mechanism for a button sewing machine proposed in the present invention, it may also have the following features: the feed fixing seat has a fixed body and a loading pad, the loading pad is stacked on the upper surface of the fixed body, and the loading pad extends out of the fixed body at one end close to the receiving die and forms the limiting step with the side of the fixed body; the side of the fixed body facing the receiving die is recessed toward the side away from the receiving die to form the avoidance step.

[0011] The material splicing and mold changing mechanism for the button sewing machine proposed in the present invention may also have the following features: the feeding channel is provided in the middle of the feeding pad, and a pair of adjustment plates for adjusting the width of the feeding channel are provided on both sides of the feeding pad.

[0012] In the material splicing and mold changing mechanism for a button sewing machine proposed in the present invention, it can also have the following characteristics: the adjustment plate is a plate-like structure, on which at least one runway-shaped adjustment hole is opened, and the loading pad is provided with at least one circular fixing hole, and the adjustment plate is fixed to the loading pad by an adjusting bolt passing through the adjustment hole and the fixing hole in sequence.

[0013] The material receiving and die changing mechanism for the button sewing machine proposed in the present invention may also have the following features: a material feeding member is movably arranged on the material feeding channel, and is used to push the material on the material feeding channel into the material receiving port.

[0014] The material receiving and mold changing mechanism for a button sewing machine proposed in the present invention may also have the following features: a blocking assembly is also installed on the feed fixed seat, and the blocking assembly comprises: a mounting plate, a rotating seat fixed on the mounting plate, a blocking member rotatably arranged on the rotating seat, and containing a blocking portion for blocking one end of the feed member toward the material receiving port.

[0015] The material receiving and die changing mechanism for the button sewing machine proposed in the present invention may also have the following features: the material receiving port has a material taking hole and a material receiving channel that are interconnected, and the support pin extends into the material taking hole from bottom to top.

[0016] In the material splicing and die-changing mechanism for a button sewing machine proposed in the present invention, it may also have the following characteristics: the material splicing die is formed with a first mounting groove inwardly on one side of the material splicing fixing seat, and the material splicing fixing seat is recessed inwardly on one side of the material splicing die to form a second mounting groove, and the elastic member is a spring, one end of which is mounted in the first mounting groove and the other end is mounted in the second mounting groove, and the spring is sleeved on the outer periphery of the support pin.

[0017] The material receiving and die changing mechanism for the button sewing machine proposed in the present invention may also have the following features: a punch rod seat is provided on the frame, a punch rod slide is movably provided on the punch rod seat, a material picking punch rod that can move up and down is installed on the punch rod slide, the material picking component is installed at the bottom of the material picking punch rod, and the frame is located above the material picking punch rod and is also provided with a material picking drive, the material picking drive acts on the material picking punch rod to drive the material picking component to descend, and the material picking component acts on the material receiving die to drive the material receiving die to move down to the material picking position for picking up the material.

[0018] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0019] The receiving die of the utility model is arranged to be movable and has a receiving position, a picking position and a die changing position. When the receiving die is in the receiving position, the receiving port is aligned with the feeding channel, and the material enters the receiving port for receiving; after the material enters the receiving port, the picking component picks up the material, and the picking component can press the receiving die down, and allow the receiving die originally in the receiving position to move down to the picking position, and the picking component can take away the material; when the receiving die moves down to the die changing position under the action of external force, the receiving die can be rotated and taken out for replacement. The replacement operation is very simple and quick, which greatly improves work efficiency.

[0020] Furthermore, the stroke from the material receiving position to the material taking position is shorter than the stroke from the material receiving position to the mold changing position, thereby ensuring the stability of the material receiving mold when the material is taken, and avoiding falling off at the material taking position to affect the subsequent material receiving process.

[0021] Furthermore, adjusting plates are provided on both sides of the feeding channel on the feeding fixed seat, and the width of the feeding channel can be adjusted by adjusting the relative distance between the pair of adjusting plates, so that the equipment can be suitable for loading materials of different sizes or models.

[0022] Furthermore, the feed fixing seat is also provided with a blocking component that can block the end of the feed piece facing the material receiving port, so as to avoid feeding failure caused by incorrect triggering of the feed piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the feeding and taking-out device of the utility model.

[0024] Figure 2 It is a schematic diagram of the internal structure of the hidden part of the frame of the feeding and taking device of the utility model.

[0025] Figure 3 It is a schematic diagram of the installation structure of the feeding assembly and the feeding fixing seat of the utility model.

[0026] Figure 4 It is a schematic diagram of the installation structure of the material receiving fixed seat and the material feeding fixed seat of the utility model.

[0027] Figure 5 It is a structural diagram of the feeding fixed seat of the utility model.

[0028] Figure 6 It is a structural diagram of the material splicing fixing seat of the utility model.

[0029] Figure 7 It is a schematic diagram of the state of the material receiving fixing seat of the utility model when it is in the material receiving position.

[0030] Figure 8 It is a cross-sectional schematic diagram of the material receiving fixing seat of the utility model when it is in the material receiving position.

[0031] Figure 9 It is a schematic diagram of the state of the material receiving fixed seat of the utility model when it is in the material taking position.

[0032] Figure 10 It is a cross-sectional schematic diagram of the utility model when the material receiving fixing seat is in the material taking position.

[0033] Figure 11 It is a cross-sectional schematic diagram of the utility model when the material receiving fixing seat is in the mold changing position.

[0034] Figure 12 This is a schematic diagram of the state of the material receiving fixing seat of the utility model when it is in the mold changing position.

[0035] Figure 13 It is a schematic diagram of the installation structure of the regulating piece of the utility model.

[0036] Figure 14 It is a schematic diagram of the installation structure of the blocking component of the utility model.

[0037] The meanings of the numbers in the figure are as follows: feeding and taking-up device 10; frame 1; material receiving and die changing mechanism 11; controller 12; fixed plate 13; feeding fixed seat 2; feeding channel 21; limiting step 22; guide step surface 221; avoidance step 23; fixed body 24; feeding pad 25; adjusting piece 26; adjusting hole 261; material receiving fixed seat 3; material receiving die 4; material receiving port 41; material taking-up hole 411; material receiving channel 412; matching step 42; guide matching step surface 421; support pin 5; elastic member 6; material taking-up component 7; movable assembly 71; punch rod seat 72; punch rod slider 73; material taking-up punch rod 74; feeding assembly 8; feeding vibration plate 81; material unloading channel 82; feeding member 83; cylinder 84; mounting seat 85; blocking assembly 9; mounting plate 91; rotating seat 92; blocking member 93; blocking part 931. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with specific embodiments:

[0039] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology. They are not used to limit the conditions for the implementation of this utility model and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "front", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0040] It should also be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it can be directly on the other element or there may be an intermediate element at the same time.

[0041] <Example>

[0042] like Figure 1 As shown, this embodiment proposes a feeding and picking device 10 of a button sewing machine, which includes a frame 1, on which a material receiving and mold changing mechanism 11 and a controller 12 for controlling the material receiving and mold changing mechanism are installed. The material receiving and mold changing mechanism 11 includes a feeding fixed seat 2, a material receiving fixed seat 3, a material receiving mold 4, a support pin 5, an elastic member 6, a picking component 7 and a feeding assembly 8. The feeding fixed seat 2 and the material receiving fixed seat 3 are both fixed relative to the frame 1. The feeding fixed seat 2 is first installed on the frame 1 through a fixing plate 13, and then the material receiving fixed seat 3 is fixed on the feeding fixed seat 2, and the material receiving fixed seat 3 is adjacent to the feeding fixed seat 2. The feeding fixed seat 2 has a feeding channel 21 for transporting materials. The material receiving mold 4 is movably arranged on the material receiving fixed seat 3 and has a material receiving port 41 corresponding to the feeding channel 21 for receiving materials. The material located on the feeding channel 21 can be transported to the material receiving port 41.

[0043] One end of the support pin 5 is installed on the material receiving fixing base 3, and the other end extends into the material receiving die 4 to support the material located in the material receiving port 41. The elastic member 6 is a spring. On the side of the material receiving die 4 facing the material receiving fixing base 3, a first installation groove is formed inward. On the side of the material receiving fixing base 3 facing the material receiving die 4, a second installation groove is formed by inward depression. One end of the spring is installed in the first installation groove, and the other end is installed in the second installation groove, and the spring is sleeved on the outer periphery of the support pin 6. The material taking component 7 is movably arranged on the machine frame 1 through the movable component 71 and is used to take away the material located in the material receiving port 41; the material receiving die 4 can move up and down relative to the material receiving fixing base 3. When the material taking component 7 moves to directly above the material receiving port 41 of the material receiving die 4 under the drive of the movable component 71, and then the material taking component 7 moves downward and gradually approaches the material receiving die 4, when it contacts the material receiving die 4 and presses the material receiving die 4 to move towards the material receiving fixing base 3 (that is, move downward), the upper end of the support pin 5 can pass through the material receiving port 41 to eject the material for the material taking component 7 to take away.

[0044] In the above process, the material receiving die 4 has a material receiving position and a material taking position. At the beginning, when the material receiving die 4 is not affected by the force of the material taking component 7, the material receiving die 4 is in the material receiving position (which can also be called the initial position). At this time, the material receiving port 41 is aligned with the feeding channel 21, and the material can enter the material receiving port 41; when the material taking component 7 starts to act to prepare for taking the material, the material receiving die 4 is pressed down, and the material receiving die 4 moves downward to the material taking position. When in this position, the upper end of the support pin 5 can pass through the material receiving port 41 to hold the material, and the material taking component 7 can take away the material. After the material taking component 7 takes away the material, the pressure applied to the material receiving die 4 will be removed, and then under the elastic action of the elastic member 6, the material receiving die 4 moves upward to return to the material receiving position.

[0045] In addition, the material receiving die 4 also has a die changing position, which is located below the material taking position. That is to say, the stroke from the material receiving position to the material taking position is L1, and the stroke from the material receiving position to the die changing position is L2, where L1 < L2. When the material receiving die 4 needs to be replaced, only need to apply pressure to the material receiving die 4 to make it move from the material receiving position to the die changing position, and then rotate the material receiving die 4 to release its cooperation relationship with the feeding fixing base 2, and the material receiving die 4 can be taken out and replaced.

[0046] As Figure 3As shown, the feeding assembly 8 includes a feeding vibration plate 81 and a feeding channel 82 mounted beside the feeding channel 21, as well as a feeding member 83 that is movable on the feeding channel 21 and a cylinder 84 that drives the feeding member 83. The material is stored in the vibration plate 81 and enters the feeding channel 21 through the feeding channel 82. When the receiving die 4 is in the receiving position, the feeding member 83 pushes the material on the feeding channel 21 into the receiving port 41, completing the material receiving. The feeding member 83 is in the shape of an elongated rod, one end of which is mounted on the cylinder 84 via a mounting base 85, and the other end is used to push the material along the feeding channel 21 and into the receiving port 41.

[0047] The matching relationship between the feeding fixed seat 2 and the receiving die 4 is as follows: Figure 4 As shown, the feeding fixed seat 2 is provided with a continuous limiting step 22 and an avoidance step 23 in the height direction on the side facing the receiving fixed seat 3, and the receiving die 4 has a matching step 42 on the side facing the feeding fixed seat 2. Figure 5 and Figure 6 As shown, the feeding fixed seat 2 has a fixed body 24 and a loading pad 25. The loading pad 25 is stacked on the upper surface of the fixed body 24, and the loading pad 25 extends out of the fixed body 24 at one end close to the receiving die 4 and forms the limiting step 22 with the side of the fixed body 24; the side of the fixed body 24 facing the receiving die 4 is recessed toward the side away from the receiving die 4 to form the avoidance step 23. The limiting step 22 has a guide step surface 221 set along the height direction, and correspondingly, the matching step 42 has a guide matching step surface 421 set along the height direction. The avoidance step 23 has an avoidance step surface 231 set along the height direction, and the length of the guide matching step surface 421 along the height direction is smaller than the length of the avoidance step surface 231 along the height direction, so that when the matching step 42 moves to the position corresponding to the avoidance step 23, it can be easily rotated and taken out. As shown Figure 5 As shown, the feeding fixed seat 2 is further provided with a recess 241 in the middle portion below the avoidance step 23, and the receiving fixed seat 3 is provided with a protrusion that can be embedded in the recess 241 in the middle portion of the side facing the feeding fixed seat 2. At the same time, the receiving fixed seat 3 is fixed to the side of the feeding fixed seat 2 by bolts, thereby realizing the fixed installation between the receiving fixed seat 3 and the feeding fixed seat 2.

[0048] When the receiving die 4 is in the receiving position, Figure 7 and Figure 8 As shown, the mating step 42 is engaged with the limiting step 22 under the elastic force of the elastic member 6, that is, the elastic member 6 presses the receiving die 4 against the limiting step 22 of the feeding fixed seat 2 through the mating step 42. At this time, the guide step surface 221 and the guide mating step surface 421 are basically completely fitted together.

[0049] The receiving die 4 can be moved down from the receiving position to the taking position along the support pin 5 under the pressure of the taking component 7. Figure 9 and Figure 10 As shown, in the material receiving position, the mating step 42 is away from the limiting step 22, but the guide step surface 221 and the guide mating step surface 421 are still partially in contact with each other, so that the receiving die 4 can still remain stable in the horizontal direction and is not likely to fall. When the material receiving component 7 leaves the receiving die 4 with the material, the receiving die 4 moves upward under the action of the elastic member 6 and returns to the material receiving position.

[0050] When the receiving die 4 is pressed down by external force (using tools or manual pressure during disassembly) and moves from the receiving position to the material changing position, Figure 11 and Figure 12 As shown, in the material changing position, the guide step surface 221 is completely separated from the guide matching step surface 421. At this time, the matching step 42 corresponds to the avoidance step 23. The receiving mold 4 can be rotated 90 degrees clockwise or counterclockwise. After rotating the matching step 42 to the position facing the left and right sides, the receiving mold 4 can be directly moved up to take out and replaced.

[0051] like Figure 13 As shown, the feeding channel 21 is located in the middle of the loading pad 25, and a pair of adjusting tabs 26 are provided on either side of the feeding channel 21 for adjusting the width of the feeding channel 21. The adjusting tab 26 is a plate-like structure with at least one track-shaped adjusting hole 261 defined therein. The loading pad 25 is also provided with at least one circular fixing hole. An adjusting bolt 262 passes through the adjusting hole 261 and the fixing hole in sequence to secure the adjusting tab 26 to the loading pad 25. The width of the feeding channel 21 can be adjusted by adjusting the position of the adjusting hole 261 relative to the fixing hole.

[0052] like Figure 4 and Figure 14 As shown, a blocking assembly 9 is also installed on the feed fixed seat 2, and the blocking assembly 9 has a mounting plate 91, a rotating seat 92 and a blocking member 93. The blocking member 93 is in the shape of a hook, one end of which is rotatably arranged on the rotating seat 92, and the other end has a blocking portion 931 for blocking the front end of the feed member 83 (the end facing the receiving port 41, reference Figure 8 and Figure 10 ), the rotating seat 92 is fixed to the side of the fixed body 24 through the mounting plate 91. When feeding is required, the blocking member 93 is lifted, and the blocking portion 931 leaves the front end of the feeding member 83. The feeding member 83 can move along the feeding channel 21 under the drive of the cylinder 84, thereby pushing the material into the receiving port 41.

[0053] like Figure 6As shown, the material receiving port 41 has a material taking hole 411 and a material receiving channel 412 that are interconnected. The material taking hole 411 is circular, and the material receiving channel 412 is long. The inner end of the material receiving channel 412 extends to the material taking hole 411. Figure 8 and Figure 10 As shown, the support pin 5 extends from bottom to top into the material taking hole 411, and the material is finally pushed to the material taking hole 411 by the feeding member 83. The support pin 5 can be pressed against the bottom of the material for the material taking component 7 to take the material.

[0054] like Figure 2 As shown, a movable assembly 71 is provided on the frame 1, which includes a punch rod seat 72, a punch rod slide 73 is movably provided on the punch rod seat 72, a pick-up punch rod 74 that can move up and down is installed on the punch rod slide 73, and the pick-up component 7 is installed at the bottom of the pick-up punch rod 74. The frame 1 is further provided with a pick-up driver 75 above the pick-up punch rod 74. When the pick-up component 7 follows the pick-up punch rod 74 and moves horizontally to just above the pick-up hole 411 of the receiving die 4, the pick-up driver 75 acts on the pick-up punch rod 74 to drive the pick-up component 7 to descend, and the pick-up component 7 acts on the receiving die 4 to drive the receiving die 4 to move down to the picking position for picking.

[0055] This embodiment can not only quickly take out materials, but also quickly change the connecting mold, and at the same time can adjust the width of the feeding channel, so that the equipment can be used in application scenarios of various sizes or models of buttons, and has a wide range of applications; and the replacement method of the connecting mold is simple and convenient, which can significantly improve work efficiency.

[0056] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. The material splicing and die changing mechanism for the button sewing machine is characterized by: Installed on the frame of the loading and unloading device of the button sewing machine, including: A feeding fixed seat, mounted on the frame, having a feeding channel for conveying materials; a material receiving fixed seat, adjacent to the material feeding fixed seat; a receiving die, movably arranged on the receiving fixed seat, and having a receiving opening corresponding to the feeding channel for receiving the material; A support pin, one end of which is mounted on the material receiving fixed seat and the other end of which extends into the material receiving die to support the material in the material receiving port; an elastic member installed between the material receiving die and the material receiving fixed seat; and A material taking component, movably arranged on the frame, for taking away the material located in the material receiving port; The receiving die also has a receiving position, a material taking position and a die changing position. When the receiving die is at the receiving position, the receiving port is aligned with the feeding channel, and the material enters the receiving port; When the receiving die is at the material taking position, the material taking component takes away the material; When the receiving die is at the die-changing position, the receiving die can be rotated and taken out; The distance from the receiving position to the taking position is L1, and the distance from the receiving position to the mold changing position is L2, wherein L1 <L2。 2. The material splicing and die changing mechanism for a button sewing machine according to claim 1, characterized in that: The feeding fixed seat is provided with a continuous limiting step and an avoidance step in the height direction on one side facing the receiving fixed seat, and the receiving die is provided with a matching step on one side facing the feeding fixed seat. When the receiving die is at the receiving position, the matching step is engaged with the limiting step under the elastic force of the elastic member; The receiving die is driven by the pressure of the picking component to move downward from the receiving position along the support pin to the picking position; when the picking component leaves the receiving die with the material, the receiving die returns to the receiving position under the action of the elastic member; When the receiving die moves downward from the receiving position along the support pin to the die changing position under the action of external force, the matching step is separated from the limiting step and corresponds to the avoiding step.

3. The material splicing and die changing mechanism for a button sewing machine according to claim 2, characterized in that: The limiting step has a guide step surface arranged along the height direction, and correspondingly, the mating step has a guide mating step surface arranged along the height direction. When the receiving mold is in the receiving position or the picking position, the guide step surface and the guide mating step surface are at least partially in contact with each other. When the receiving mold is in the mold changing position, the guide step surface and the guide mating step surface are completely separated.

4. The material splicing and die changing mechanism for a button sewing machine according to claim 3, characterized in that: The avoidance step has a avoidance step surface arranged along the height direction, and the length of the guide matching step surface along the height direction is smaller than the length of the avoidance step surface along the height direction.

5. The material splicing and die changing mechanism for a button sewing machine according to claim 4, characterized in that: The feeding fixed seat has a fixed body and a loading pad, the loading pad is stacked on the upper surface of the fixed body, and the loading pad extends out of the fixed body at one end close to the receiving mold and forms the limiting step with the side of the fixed body; the side of the fixed body facing the receiving mold is recessed to form the avoidance step.

6. The material splicing and die changing mechanism for a button sewing machine according to claim 5, characterized in that: The feeding channel is provided in the middle of the loading pad, and a pair of adjusting plates for adjusting the width of the feeding channel are provided on both sides of the loading pad; the adjusting plates are plate-like structures with at least one runway-shaped adjusting hole provided thereon, and at least one circular fixing hole is provided on the loading pad, and the adjusting plate is fixed to the loading pad by an adjusting bolt passing through the adjusting hole and the fixing hole in sequence.

7. The material splicing and die changing mechanism for a button sewing machine according to any one of claims 1 to 6, characterized in that: It also has a feeding piece which is movably arranged on the feeding channel and is used for pushing the material on the feeding channel into the receiving port.

8. The material splicing and die changing mechanism for a button sewing machine according to claim 7, characterized in that: The material receiving port has a material taking hole and a material receiving channel which are interconnected, and the support pin extends into the material taking hole from bottom to top.

9. The material splicing and die changing mechanism for a button sewing machine according to claim 7, characterized in that: The feeding fixed seat is also provided with a blocking component, which has: The mounting plate is mounted on the feed fixing seat. A rotating seat is fixed on the mounting plate. The blocking member is rotatably arranged on the rotating seat and comprises a blocking portion for blocking the end of the feeding member toward the receiving port.

10. The material splicing and die changing mechanism for a button sewing machine according to claim 9, characterized in that: The frame is provided with a punch rod seat, a punch rod slide is movably provided on the punch rod seat, a material picking punch rod that can move up and down is installed on the punch rod slide, the material picking component is installed at the bottom of the material picking punch rod, and the frame is located above the material picking punch rod and is also provided with a material picking driver, the material picking driver acts on the material picking punch rod to drive the material picking component to descend, and the material picking component acts on the material receiving die to drive the material receiving die to move down to the material picking position for picking up materials.

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