A cutting frame and its die-casting mold and die-casting process

Abstract

The present invention discloses a cutting frame, its die-casting mold and die-casting process, belonging to the technical field of sewing machines. The cutting frame includes a bottom plate part, a suction part, a support plate part and a mounting part integrally die-cast; one end of the bottom plate part is provided with a tool mounting structure for mounting a cutting knife, a suction cavity is provided on the bottom plate part, and a suction port for communicating the cutting station of the cutting knife with the suction cavity is provided at the end of the suction cavity, and a plurality of demolding grooves are provided on the bottom plate part; the suction part is inclined and arranged at the other end of the bottom plate part and is communicated with the suction cavity; the support plate part is vertically arranged on the bottom plate part and is used for mounting the driving component of the cutting knife; the mounting part is vertically arranged on the support plate part, and the mounting part and the bottom plate part are arranged on both sides of the support plate part. The die-casting mold provided by the present invention can quickly die-cast an integrated cutting frame. Compared with the traditional split integrated cutting frame, the support frame body obtained by integral die-casting greatly shortens the production cycle caused by integrated welding and the influence of welding deformation on the workpiece precision, thereby reducing the production cost of the cutting frame and improving the use effect of the cutting frame.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewing machines, and particularly relates to a cutting frame, its die-casting mold and die-casting process. Background Art

[0002] The cutting support for sewing machine to sew empty thread loops and cloth tapes consists of four support components and five screws. Among them, some sheet metals need to be welded. The manufacturing and assembly cycle of the split components is long, the overall assembly accuracy is low, and the welding deformation is large, resulting in high overall manufacturing costs. Summary of the Invention

[0003] Object of the Invention: To provide a cutting frame, its die-casting mold and die-casting process to solve the above problems existing in the prior art.

[0004] Technical Solution: A cutting frame includes a bottom plate part, a suction part, a support plate part and an installation part integrally die-cast; wherein,

[0005] One end of the bottom plate part is provided with a tool installation structure for installing a cutting tool. The bottom plate part is provided with a suction cavity. The end of the suction cavity is provided with a suction port for communicating the cutting station of the cutting tool with the suction cavity. The bottom plate part is provided with a plurality of demolding grooves;

[0006] The suction part is obliquely arranged at the other end of the bottom plate part and is communicated with the suction cavity;

[0007] The support plate part is vertically arranged on the bottom plate part for installing the driving component of the cutting tool;

[0008] The installation part is vertically arranged on the support plate part, and the installation part and the bottom plate part are arranged on both sides of the support plate part.

[0009] Further, the bottom plate part is provided with a wire clamping structure I, and the wire clamping structure I extends to the tool installation structure. The bottom plate part is provided with a wire routing groove.

[0010] Further, the support plate part is provided with a tool shaft groove and a wire clamping structure II, and the wire clamping structure II is used for fixing the signal wire of the signal transmitter.

[0011] A die-casting mold for a cutting frame includes a fixed mold and a movable mold. The fixed mold and the movable mold are slidably connected through a guide post. A die-casting cavity matching the structure of the integral cutting frame is formed between the fixed mold and the movable mold. The die-casting cavity communicates with the outside through a die-casting runner and a slag-removing exhaust cavity respectively.

[0012] Further, the fixed mold includes a demolding base, a fixed mold shell, a fixed mold core, an air suction sliding group, a support sliding group, and a die-casting nozzle. The fixed mold shell is arranged on the demolding base, and the fixed mold core, the air suction sliding group, the support sliding group, and the die-casting nozzle are all embedded in the fixed mold shell. The fixed mold core cooperates with the air suction sliding group and the support sliding group to form a fixed cavity of the die-casting cavity. The die-casting runner is communicated with an external die-casting device through the die-casting nozzle. The fixed mold core cooperates with the fixed mold shell to form a slag-receiving and exhaust fixed cavity.

[0013] Further, the air suction sliding group is arranged in an air suction groove of the fixed mold shell. The air suction sliding group includes an air suction sliding component and an air hole extraction rod installed at the end of the sliding component. The sliding component includes a slide rail installed in the air suction groove, an inclined slider slidably connected to the slide rail, a traction rod installed at one end of the inclined slider, and a fixing piece sleeved on the traction rod and installed on the fixed mold shell. The air hole extraction rod is installed at the other end of the inclined slider for forming an inner hole of the air suction part. The inclined slider cooperates with an air suction inclined rod installed on the moving mold. A boosting spring is arranged between the traction rod and the fixing piece.

[0014] The support sliding group is arranged in a support groove of the fixed mold shell. The support sliding group includes a support sliding component and a support extraction block installed at the end of the support sliding component. The support sliding component includes a slide rail installed in the support groove, an inclined slider slidably connected to the slide rail, a traction rod installed at one end of the inclined slider, and a fixing piece sleeved on the traction rod and installed on the fixed mold shell. The support extraction block is installed at the other end of the inclined slider for forming an installation part. The inclined slider cooperates with a support inclined rod installed on the moving mold. A boosting spring is arranged between the traction rod and the fixing piece.

[0015] Further, the moving mold includes a moving mold shell, a moving mold core and a die-casting port embedded in the moving mold shell. A moving cavity is arranged on the moving mold core. The moving cavity cooperates with the fixed cavity to form a die-casting cavity. A slag-receiving and exhaust moving cavity is arranged on the moving mold core. The slag-receiving and exhaust moving cavity cooperates with the slag-receiving and exhaust fixed cavity to form a slag-receiving and exhaust cavity. The air suction inclined rod and the support inclined rod are both installed on the moving mold shell. The die-casting port is matched with the die-casting nozzle.

[0016] Further, the die-casting mold further includes a water cooling system, and the water cooling system includes:

[0017] Die-casting cooling branch. The die-casting cooling branch is formed by a die-casting nozzle embedded in the die-casting groove of the fixed mold shell. The die-casting nozzle includes a nozzle body and a circulating plug. The nozzle body is embedded in the die-casting groove. A cooling cavity is provided on the nozzle body. The circulating plug is arranged in the cooling cavity. The inside of the circulating plug has a plug cavity structure. A convex structure for separating the cooling cavity is provided on the outer wall of the circulating plug. A circulation hole penetrating the plug cavity is provided on the circulating plug. Water inlets and outlets respectively penetrating the cooling cavity are provided on the nozzle body. The water inlets and outlets are arranged on both sides of the convex structure. The water inlets are matched with the circulation holes.

[0018] Fixed mold cooling branch. The die-casting cooling branch is formed by a water-cooling channel opened on the fixed mold core.

[0019] Slider group cooling branch. The slider group cooling branch is formed by a cold flow channel provided on the inclined slider in the supporting slider group. A water-cooling interface is provided at the end of the cold flow channel.

[0020] Moving mold cooling branch. The die-casting cooling branch is formed by a water-cooling channel opened on the moving mold core.

[0021] Furthermore, the demolding base includes a base body and ejector pins. A plurality of the ejector pins are arranged on the base body and pass through the fixed mold core for forming a demolding groove on the integrated cutting frame.

[0022] A die-casting process for a die-casting mold for a cutting frame includes the following steps:

[0023] Step 1: Preheat the mold to 160°C to 200°C.

[0024] Step 2: Spray a release agent on the die-casting cavity, slag-removing and exhaust cavity, and die-casting runner.

[0025] Step 3: Die-cast AlSi10MnMg molten material not lower than 660°C into the die-casting mold at a speed of 2 m / s.

[0026] Beneficial effects: The die-casting mold provided by the present invention can quickly die-cast an integrated cutting frame. Compared with the traditional split integrated cutting frame, the support frame body obtained by integral die-casting greatly shortens the production cycle caused by integrated welding and the influence of welding deformation on the workpiece accuracy, thereby reducing the production cost of the cutting frame and improving the use effect of the cutting frame. Description of the Drawings

[0027] Figure 1 and Figure 2 is a schematic structural diagram of the integrated cutting frame in the present invention;

[0028] Figure 3 is a schematic structural diagram of the die-casting mold in the present invention;

[0029] Figure 4It is a schematic diagram of the opening of the die-casting mold in the present invention;

[0030] Figure 5 It is an exploded view of the fixed mold in the present invention;

[0031] Figure 6 It is a schematic structural diagram of the fixed mold core in the present invention;

[0032] Figure 7 It is a schematic internal structure diagram of the die-casting nozzle in the present invention;

[0033] Figure 8 It is a schematic structural diagram of the moving mold in the present invention;

[0034] Figure 9 It is a schematic structural diagram of the semi-finished product obtained by demolding in the present invention;

[0035] Figure 10 It is a schematic structural diagram of the KH-type bracket in the present invention.

[0036] The reference numerals are: 1, bottom plate part; 11, air suction cavity; 12, air suction port; 13, wiring groove; 14, wire clamping structure one; 15, positioning hole; 16, demolding groove; 17, tool installation structure; 2, air suction part; 3, support plate part; 30, grease hole one; 31, tool shaft groove; 32, wire clamping structure two; 33, safety baffle; 4, installation part; 40, grease hole two; 41, installation hole; 5, integrated cutting frame; 6, fixed mold; 61, demolding base; 611, seat body; 612, ejector pin; 62, fixed mold shell; 621, mold core groove; 622, support groove; 623, air suction groove; 624, die-casting groove; 63, fixed mold core; 631, fixed cavity; 632, air extraction and suction groove; 633, air extraction support groove; 634, die-casting runner; 635, water cooling channel; 6361, slag receiving groove one; 6362, slag receiving groove two; 6363, slag receiving groove three; 6364, slag receiving groove four; 6365, slag receiving groove five; 6366, slag receiving groove six; 6367, slag receiving groove seven; 6368, slag receiving groove eight; 64, air suction sliding group; 641, fixing part; 642, boosting spring; 643, traction rod; 644, inclined slider; 645, air hole extraction rod; 646, slide rail; 65, support sliding group; 651, support extraction block; 652, water cooling interface; 66, die-casting nozzle; 661, nozzle body; 662, cooling cavity; 663, water inlet; 664, water outlet; 665, positioning hole; 666, fastening hole; 667, circulation plug; 668, plug cavity; 669, circulation hole; 7, moving mold; 71, moving mold shell; 72, die-casting port; 73, moving cavity; 74, air suction inclined rod; 75, support inclined rod; 8, slag block; 80, die-casting package; 81, slag receiving package one; 82, slag receiving package two; 83, slag receiving package three; 84, slag receiving package four; 85, slag receiving package five; 86, slag receiving package six; 87, slag receiving package seven; 88, slag receiving package eight; 9, KH-type bracket. Detailed implementation mode

[0037] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0038] Embodiment 1. This embodiment provides a support frame body used for cutting the empty thread loop of a sewing machine. It is fixed to the main body structure of the sewing machine and can provide an installation station for the tool for cutting the empty thread loop and the power source for driving the tool.

[0039] As Figures 1 - 2 shown, a cutting frame includes a bottom plate portion 1, a suction portion 2, a support plate portion 3, and an installation portion 4 integrally die-cast. Compared with the traditional split integrated cutting frame, the support frame body obtained by integral die-casting greatly shortens the production cycle caused by integrated welding and the influence of welding deformation on the workpiece accuracy, thereby reducing the production cost of the cutting frame and improving the use effect of the cutting frame.

[0040] Specifically, in the integrated cutting frame 5 provided by the present invention, one end of the bottom plate portion 1 is provided with a tool installation structure 17 for installing a cutting tool. A suction cavity 11 is provided on the bottom plate portion 1, and a suction port 12 for connecting the cutting station of the cutting tool and the suction cavity 11 is provided at the end of the suction cavity 11. The cutting tool will cut the redundant thread loop after sewing is completed, and the empty thread loop falls at the suction port 12 and is sucked into the suction cavity 11 connected to the negative pressure.

[0041] A plurality of demolding grooves 16 are provided on the bottom plate portion 1. Since the integrated cutting frame 5 is made by die-casting with a mold, when the mold is opened, it is necessary to prevent the integrated cutting frame 5 from falling off the mold instantly. Therefore, a ejector rod is required to support the integrated cutting frame 5, and the demolding groove 16 is a structure that cooperates with the ejector rod and is also a structural feature of the integrated cutting frame 5 made by die-casting with a mold.

[0042] A wire clamping structure 14 is provided on the bottom plate portion 1, and the wire clamping structure 14 extends to the tool installation structure 17. The wire clamping structure 14 is used for the signal line of the signal receiver to route. A wiring groove 13 is provided on the bottom plate portion 1, and the wiring groove 13 is used for the signal line of the signal transmitter to route. Reserving a wiring structure on the bottom plate portion 1 can improve the installation effect of the bottom plate portion 1 on external electronic components and enhance the use effect of the integrated cutting frame 5.

[0043] The air suction part 2 is inclinedly arranged at the other end of the bottom plate part 1 and is communicated with the air suction cavity 11. The air suction part 2 is of a tubular structure, with one end inclinedly arranged on the bottom plate part 1 and the other end connected to a negative pressure air source. The air suction part 2 is inclinedly arranged because the air suction part 2 needs to be externally connected to a negative pressure pipe. The manufacturing difficulty of a straight design will be reduced, but the negative pressure pipe will be higher than the bottom plate part 1, which will have an adverse impact on the cloth feeding process.

[0044] The support plate part 3 is vertically arranged on the bottom plate part 1 and is used for installing the driving component of the cutting scissors. The support plate part 3 is provided with a cutter shaft groove 31 and a wire clamping structure II 32. The wire clamping structure II 32 is used for fixing the signal wire extending from the wire routing groove 13. The signal transmitter cooperates with the signal receiver to identify the presence or absence of the cloth. The transmission structure for driving the cutting scissors is arranged in the cutter shaft groove 31. In particular, the support plate part 3 further includes a safety baffle 33, and the safety baffle 33 plays a role in expanding the shielding range of the support plate part 3 and can shield the components arranged on its rear side.

[0045] The installation part 4 is vertically arranged on the support plate part 3, and the installation part 4 and the bottom plate part 1 are arranged on both sides of the support plate part 3. The installation part 4 is provided with an installation hole 41, and the integrated cutting frame 5 is fixed on the sewing machine main body structure through the installation hole 41. To accelerate the installation effect of the integrated cutting frame 5, positioning holes 15 can be arranged on the bottom plate part 1, and the installation accuracy of assembling the integrated cutting frame 5 from two directions is higher. In addition, a grease hole I 30 and a grease hole II 40 are respectively arranged on the support plate part 3 and the installation part 4. During use, the two grease holes can lubricate the movement of the moving cutter shaft, thereby improving the durability of the device.

[0046] Embodiment 2, this embodiment is a die-casting mold used for casting the cutting frame in Embodiment 1.

[0047] As Figures 3 - 9 shown, a die-casting mold for a cutting frame includes a fixed mold 6 and a movable mold 7. The fixed mold 6 and the movable mold 7 are slidably connected through guide columns. A die-casting cavity matching the structure of the integrated cutting frame 5 is formed between the fixed mold 6 and the movable mold 7. The die-casting cavity communicates with the outside through a die-casting runner 634 and a slag-removing and exhaust cavity respectively; wherein, the integrated cutting frame 5 is the cutting frame in Embodiment 1.

[0048] The die-casting runner 634 is located below the die-casting chamber. The design of the die-casting runner 634 by the mold determines that the die-casting process is the upper exhaust method of bottom die-casting. The slag-removing and exhaust chamber includes a fully enclosed slag-removing groove 6361 and seven slag-removing grooves extending to the outside of the mold (slag-removing groove 6362, slag-removing groove 6363, slag-removing groove 6364, slag-removing groove 6365, slag-removing groove 6366, slag-removing groove 6367, and slag-removing groove 6368). The slag-removing groove 6361 is connected to the lowest position of the die-casting chamber and is used for slag-removing of the boss structure where the positioning hole 15 is opened on the bottom plate part 1. Due to its lowest position, air will be preferentially discharged here, so no exhaust design is required here; the other seven slag-removing grooves all have the ability to exhaust. Specifically, the slag-removing groove 6362 is used for slag-removing of the upper and lower corner positions of the bottom plate part 1, the slag-removing groove 6363 is used for slag-removing of the air suction part 2, the slag-removing groove 6364 is used for slag-removing of the tool mounting structure 17, the slag-removing grooves 6365 and 6368 are used for slag-removing of the intersection line position between the bottom plate part 1 and the support plate part 3, the slag-removing groove 6366 is used for slag-removing of the mounting part 4, the slag-removing groove 6367 is used for slag-removing of the safety baffle 33. The structures of the slag-removing grooves from two to seven all show a structure where the deep groove gradually shrinks and flattens. The deep groove end is connected to the die-casting chamber, and the flat end extends to the outside of the mold. The slag-removing and exhaust chambers are separately arranged at the corners of the integrated cutting frame 5, which can greatly alleviate the phenomenon of air bubbles appearing inside the integrated cutting frame 5 and improve the quality of the cutting frame. The die-casting runner 634 is designed with three branches, which can accelerate the diversion and make the molten material quickly spread out flat in the die-casting chamber.

[0049] As Figure 9 shown, in the die-casting finished product, the slag-removing grooves (slag-removing groove 6361, slag-removing groove 6362, slag-removing groove 6363, slag-removing groove 6364, slag-removing groove 6365, slag-removing groove 6366, slag-removing groove 6367, and slag-removing groove 6368) obtain slag-removing packages (slag-removing package 81, slag-removing package 82, slag-removing package 83, slag-removing package 84, slag-removing package 85, slag-removing package 86, slag-removing package 87, and slag-removing package 88), and the die-casting runner 634 obtains the die-casting package 80.

[0050] As Figures 3 - 6 shown, the fixed mold 6 includes a demolding base 61, a fixed mold shell 62, a fixed mold core 63, an air suction sliding group 64, a support sliding group 65, and a die-casting nozzle 66. The fixed mold shell 62 is arranged in the mold core groove 621 of the demolding base 61, and the fixed mold core 63, the air suction sliding group 64, the support sliding group 65, and the die-casting nozzle 66 are all embedded in the fixed mold shell 62;

[0051] Among them, as Figure 5As shown, the demoulding base 61 includes a base body 611 and ejector pins 612. A number of ejector pins 612 are arranged on the base body 611 and pass through the fixed die core 63, and are used to form a demoulding groove 16 on the integrated cutting frame 5. After die casting is completed, when the moving die 7 is separated from the fixed die 6, the ejector pins 612 can support the finished product of the integrated cutting frame 5 to prevent the direct falling off of the finished product during mold opening. When the ejector pins 612 retract into the fixed die core 63, the finished product of the integrated cutting frame 5 is demoulded;

[0052] The fixed die core 63 cooperates with the air suction sliding group 64 and the support sliding group 65 to form a fixed cavity 631 of the die casting chamber; because the structure of the integrated cutting frame 5 is complex, the fixed cavity 631 needs to be mainly formed by the fixed die core 63, supplemented by the air suction sliding group 64 and the support sliding group 65, and surrounded by magnetic energy together;

[0053] The die casting runner 634 is communicated with the external die casting device through the die casting nozzle 66; because the molten metal is injected into the mold under high pressure during die casting, the die casting nozzle 66 needs to be able to withstand this impact and needs to be independently arranged in design to avoid overall replacement after damage.

[0054] The fixed die core 63 cooperates with the fixed die shell 62 to form a slag receiving and exhaust fixed cavity. When the slag receiving and exhaust fixed cavity is attached to the moving die 7, a slag receiving and exhaust cavity is formed. Because exhaust is required, the exhaust part needs to extend to the fixed die shell 62.

[0055] Among them, the air suction sliding group 64 is arranged in the air suction groove 623 of the fixed die shell 62. The air suction sliding group 64 includes an air suction sliding component and an air hole extraction rod 645 installed at the end of the sliding component. The sliding component includes a slide rail 646 installed in the air suction groove 623, an inclined slider 644 slidably connected to the slide rail 646, a traction rod 643 installed at one end of the inclined slider 644, and a fixing member 641 sleeved on the traction rod 643 and installed on the fixed die shell 62. The air hole extraction rod 645 is installed at the other end of the inclined slider 644 and is used for the formation of the inner hole of the air suction part 2. The inclined slider 644 cooperates with the air suction inclined rod 74 installed on the moving die 7, and a boosting spring 642 is arranged between the traction rod 643 and the fixing member 641;

[0056] The support sliding group 65 is arranged in the support groove 622 of the fixed die shell 62. The support sliding group 65 includes a support sliding component and a support extraction block 651 installed at the end of the support sliding component. The support sliding component includes a slide rail installed in the support groove 622, an inclined slider slidably connected to the slide rail, a traction rod installed at one end of the inclined slider, and a fixing member sleeved on the traction rod and installed on the fixed die shell. The support extraction block 651 is installed at the other end of the inclined slider and is used for the formation of the installation part 4. The inclined slider cooperates with the support inclined rod 75 installed on the moving die 7, and a boosting spring is arranged between the traction rod and the fixing member.

[0057] Specifically, the setting of the air suction sliding group 64 also requires a suction air extraction groove 632 to be opened on the fixed die core 63 to make way for it, and the setting of the support sliding group 65 also requires a support extraction groove 633 to be opened on the fixed die core 63 to make way for it; when the moving die 7 leaves the fixed die 6, due to the movement of the air suction inclined rod 74 and the support inclined rod 75, the air hole extraction rod 645 and the support extraction block 651 are driven to separate from the integrated cutting frame 5, and the inclined extraction design meets the mold opening method in which the air suction part 2 is inclined to the bottom plate part 1.

[0058] As Figure 4 and Figure 8 shown, the moving die 7 includes a moving die shell 71, as well as a moving die core and a die casting port 72 embedded in the moving die shell 71. A moving cavity 73 is provided on the moving die core. The moving cavity 73 cooperates with the fixed cavity 631 to form a die casting cavity. A slag receiving and exhaust moving cavity is provided on the moving die core, and the slag receiving and exhaust moving cavity cooperates with the slag receiving and exhaust fixed cavity to form a slag receiving and exhaust cavity. The air suction inclined rod 74 and the support inclined rod 75 are both installed on the moving die shell 71, and the die casting port 72 is matched with the die casting nozzle 66.

[0059] Specifically, the die casting mold further includes a water cooling system, and the water cooling system includes:

[0060] A die casting cooling branch, which is formed by the die casting nozzle 66 embedded in the die casting groove 624 of the fixed die shell 62. The die casting nozzle 66 includes a nozzle body 661 and a circulation plug 667. The nozzle body 661 is embedded in the die casting groove 624. A cooling cavity 662 is opened on the nozzle body 661. The circulation plug 667 is arranged in the cooling cavity 662. The inside of the circulation plug 667 has a plug cavity 668 structure. A raised structure for separating the cooling cavity 662 is provided on the outer wall of the circulation plug 667. A circulation hole 669 penetrating the plug cavity 668 is opened on the circulation plug 667. An inlet water port 663 and an outlet water port 664 that respectively penetrate the cooling cavity 662 are opened on the nozzle body 661. The inlet water port 663 and the outlet water port 664 are respectively arranged on both sides of the raised structure, and the inlet water port 663 is matched with the circulation hole 669; among them, a positioning hole 665 and a fastening hole 666 are opened on the nozzle body 661. The positioning hole 665 can align the inlet water port 663 and the outlet water port 664 with the cooling water holes on the die casting groove 624, and the fastening hole 666 cooperates with a screw to fix the die casting nozzle 66 on the fixed die shell 62. When cold water circulates, the circulation hole 669 and the inlet water port 663 should be set at the farthest distance, so that the cooling water fills the cooling cavity 662 on one side of the raised structure and then enters the plug cavity 668, and then enters the cooling cavity 662 on the other side of the raised structure from the plug cavity 668, and finally is discharged from the outlet water port 664. The entire water circulation path is relatively long, and the cooling effect is good. Here, the positions of the inlet water port 663 and the outlet water port 664 can be interchanged.

[0061] The fixed mold cooling branch is formed by the water cooling channels 635 formed on the fixed mold core 63; the slide group cooling branch is formed by the cold flow channels provided on the inclined sliders in the support slide group 65, and a water cooling interface 652 is provided at the end of the cold flow channel; the moving mold cooling branch is formed by the water cooling channels formed on the moving mold core.

[0062] Among them, the hardness of the moving mold core and the fixed mold core 63 is HRC52, the surface is nitrided, and the nitriding layer depth is 10um.

[0063] Example 3: This example is based on the die-casting process for preparing the cutting frame in Example 1 in the die-casting mold of Example 2, taking the installation of the die-casting mold on a Toyo 250T die-casting machine as an example.

[0064] A die-casting process for a die-casting mold for a cutting frame includes the following steps:

[0065] Step 1: Preheat the mold to 160°C to 200°C; among them, the mold is the die-casting mold in Example 2.

[0066] Step 2: Spray release agent on the die-casting cavity, slag-removing and exhaust cavity, and die-casting runner 634.

[0067] Step 3: Die-cast AlSi10MnMg molten material not lower than 660°C into the die-casting mold at a speed of 2m / s.

[0068] The die-casting holding time is not less than 5 seconds, and the entire die-casting cycle is about 25 seconds. The production efficiency is much higher than that of the traditional split integrated cutting frame.

[0069] Example 4: The cutting frame in Example 1 is of AT model. The structures of the cutting frames used by different models of sewing machines are slightly different. For example, Figure 10 as shown, Figure 10 the cutting frame in is a KH-type bracket, and its traditional structure is also a split integrated cutting frame. Through the die-casting production process provided in Example 3, combined with the corresponding mold, the dispersed integrated bracket structure for sewing machines can be integrally die-cast. That is to say, the scope of protection of the present invention is not limited to the integrated AT and KH-type brackets and the molds for die-casting them. The present invention aims to protect the optimization of the traditional split integrated structure into an integrated structure in the sewing machine field and the die-casting mold used to produce the integrated structure.

[0070] The preferred embodiments of the invention have been described in detail above in conjunction with the accompanying drawings. However, the invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the invention, various equivalent transformations can be made to the technical solutions of the invention, and these equivalent transformations all belong to the protection scope of the invention.

Claims

1. A die-casting mold for a cutting frame, comprising a fixed mold (6) and a movable mold (7), wherein the fixed mold (6) and the movable mold (7) are slidably connected through guide columns, and is characterized in that, A die casting cavity matching the structure of the integral cutting frame (5) is formed between the fixed mold (6) and the movable mold (7), and the die casting cavity communicates with the outside through a die casting runner (634) and a slag receiving and exhaust cavity respectively; Among them, the integral cutting frame (5) includes a bottom plate part (1), a suction part (2), a support plate part (3) and a mounting part (4) formed by integral die casting; One end of the bottom plate part (1) is provided with a tool mounting structure (17) for mounting a cutting knife. The bottom plate part (1) is provided with a suction cavity (11). The end of the suction cavity (11) is provided with a suction port (12) for communicating the cutting station of the cutting knife with the suction cavity (11). The bottom plate part (1) is provided with a plurality of demolding grooves (16); the suction part (2) is obliquely arranged at the other end of the bottom plate part (1) and communicates with the suction cavity (11); the support plate part (3) is vertically arranged on the bottom plate part (1) for mounting a driving component of the cutting knife; the mounting part (4) is vertically arranged on the support plate part (3), and the mounting part (4) and the bottom plate part (1) are arranged on both sides of the support plate part (3); the bottom plate part (1) is provided with a wire clamping structure one (14), and the wire clamping structure one (14) extends to the tool mounting structure (17). The bottom plate part (1) is provided with a wiring groove (13); the support plate part (3) is provided with a tool shaft groove (31) and a wire clamping structure two (32), and the wire clamping structure two (32) is used for fixing the signal line of the signal transmitter; The fixed mold (6) includes a demolding base (61), a fixed mold shell (62), a fixed mold core (63), a suction sliding group (64), a support sliding group (65) and a die casting nozzle (66). The fixed mold shell (62) is arranged on the demolding base (61). The fixed mold core (63), the suction sliding group (64), the support sliding group (65) and the die casting nozzle (66) are all embedded in the fixed mold shell (62); the fixed mold core (63) cooperates with the suction sliding group (64) and the support sliding group (65) to form a fixed cavity (631) of the die casting cavity; the die casting runner (634) communicates with an external die casting device through the die casting nozzle (66); the fixed mold core (63) cooperates with the fixed mold shell (62) to form a slag receiving and exhaust fixed cavity; The movable mold (7) includes a movable mold shell (71), and a movable mold core and a die casting port (72) embedded in the movable mold shell (71). A movable cavity (73) is provided on the movable mold core. The movable cavity (73) cooperates with the fixed cavity (631) to form a die casting cavity. A slag receiving and exhaust movable cavity is provided on the movable mold core. The slag receiving and exhaust movable cavity and the slag receiving and exhaust fixed cavity cooperate to form a slag receiving and exhaust cavity. The suction inclined rod (74) and the support inclined rod (75) are both installed on the movable mold shell (71), and the die casting port (72) matches the die casting nozzle (66).

2. The die-casting mold for a cutting frame according to claim 1, wherein, The suction sliding group (64) is arranged in the suction groove (623) of the fixed mold shell (62). The suction sliding group (64) includes a suction sliding component and a pore suction rod (645) installed at the end of the sliding component. The sliding component includes a slide rail (646) installed in the suction groove (623), an inclined slider (644) slidably connected to the slide rail (646), a traction rod (643) installed at one end of the inclined slider (644), and a fixing member (641) sleeved on the traction rod (643) and installed on the fixed mold shell (62). The pore suction rod (645) is installed at the other end of the inclined slider (644) and is used for the formation of the inner hole of the air suction part (2). The inclined slider (644) cooperates with a suction inclined rod (74) installed on the moving mold (7). A boosting spring (642) is arranged between the traction rod (643) and the fixing member (641); The support sliding group (65) is arranged in the support groove (622) of the fixed mold shell (62). The support sliding group (65) includes a support sliding component and a support extraction block (651) installed at the end of the support sliding component. The support sliding component includes a slide rail installed in the support groove (622), an inclined slider slidably connected to the slide rail, a traction rod installed at one end of the inclined slider, and a fixing member sleeved on the traction rod and installed on the fixed mold shell. The support extraction block (651) is installed at the other end of the inclined slider and is used for the formation of the installation part (4). The inclined slider cooperates with a support inclined rod (75) installed on the moving mold (7). A boosting spring is arranged between the traction rod and the fixing member.

3. The die-casting mold for a cutting frame according to claim 1, characterized in that, The die-casting mold further includes a water cooling system, and the water cooling system includes: A die-casting cooling branch formed by a die-casting nozzle (66) embedded in the die-casting groove (624) of the fixed mold shell (62). The die-casting nozzle (66) includes a nozzle body (661) and a circulation plug (667). The nozzle body (661) is embedded in the die-casting groove (624). A cooling cavity (662) is formed on the nozzle body (661). The circulation plug (667) is arranged in the cooling cavity (662). The inside of the circulation plug (667) has a plug cavity (668) structure. A convex structure for separating the cooling cavity (662) is arranged on the outer wall of the circulation plug (667). A circulation hole (669) penetrating through the plug cavity (668) is formed on the circulation plug (667). An inlet (663) and an outlet (664) respectively penetrating through the cooling cavity (662) are formed on the nozzle body (661). The inlet (663) and the outlet (664) are respectively arranged on both sides of the convex structure. The inlet (663) is matched with the circulation hole (669); A fixed mold cooling branch formed by a water cooling channel (635) opened on the fixed mold core (63); A sliding group cooling branch formed by a cold flow channel arranged on the inclined slider in the support sliding group (65). A water cooling interface (652) is arranged at the end of the cold flow channel; A moving mold cooling branch formed by a water cooling channel opened on the moving mold core.

4. A die-casting mold for a cutting frame according to claim 3, characterized in that the demolding base (61) includes a base body (611) and ejector pins (612), and a plurality of the ejector pins (612) are arranged on the base body (611) and pass through the fixed mold core (63) for forming a demolding groove (16) on the integrated cutting frame (5).

5. Die casting process of a die casting mold for a cutting frame, characterized in that, It includes the following steps: Step 1: Preheat the mold to 160°C to 200°C; wherein, the mold is the die-casting mold according to claim 1; Step 2: Spray a mold release agent on the die-casting cavity, the slag-removing exhaust cavity and the die-casting runner (634); Step 3: Die-cast AlSi10MnMg molten material not lower than 660°C into the die-casting mold at a speed of 2 m / s.

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