Needle selector for underwear machine and its manufacturing process

Abstract

The present invention discloses a needle selector for an underwear machine and its preparation process, which relates to textile machinery accessories and aims to solve the problem that when the temperature inside the needle selector rises, the temperature of the magnetic bar inside the needle selector easily rises, thereby affecting the working speed of the needle selector. The key points of the technical solution are: comprising a needle selector frame, a magnetic coil assembly, a needle selector blade and a circuit board, a wire plate support portion provided in the needle selector frame, a magnetic coil support portion located on one side of the wire plate support portion in the needle selector frame, the magnetic coil support portion or the wire plate support portion is connected to the needle selector frame to conduct heat energy accumulated by the circuit board or induction coil from the inside to the outside. When the power supply direction of the present invention is reversed and the needle selector blade is moved back and forth at high speed under the action of magnetism, heat can be conducted from the magnetic coil support portion to the needle selector frame, thereby improving the heat dissipation efficiency of the magnetic bar or coil inside the needle selector, improving the heating condition of the needle selector, and improving the needle selection efficiency of the needle selector by more than 30%.

Description

Technical Field

[0001] The present invention relates to textile machinery accessories, and more particularly to a needle selector for an underwear machine. Background Art

[0002] The needle selection devices on existing textile machinery are divided into electromagnetic and piezoelectric ceramic needle selectors according to their working principles. The electromagnetic needle selector is increasingly widely used due to its simple structure and ease of use. The working principle of the electromagnetic needle selector is as follows: the movement of the needle selector cutter head is controlled by energizing the coil to control a permanent magnet installed on the cutter head. After the coil is energized, N poles and S poles are generated at both ends of the coil. According to the principle of like poles repel and opposite poles attract, the N pole and S pole of the coil are changed by changing the direction of power supply to the coil, thereby controlling the up and down movement of the cutter head.

[0003] The Chinese patent publication number CN201793880U discloses a needle selector for an underwear machine. Its technical highlights are: it includes a needle selector frame, a circuit board is fixedly installed at one end of the needle selector frame, a power interface is installed on the circuit board, and a cutter head cover is fixedly installed at the other end corresponding to the circuit board. 16 groups of induction coils are arranged in the needle selector frame, the induction coils are connected to the circuit board wires, and the needle selection blades are movably installed on the needle selector frame. There are 16 needle selection blades, each of which includes a permanent magnet and a needle selection head. The permanent magnets correspond to the induction coils one by one, and the needle selection heads are evenly arranged through the cutter head cover. The needle selection head is a "T"-shaped head with a bevel design on its head.

[0004] A ten-segment needle selector disclosed in a Chinese patent with publication number CN209428690U has the following technical points: side panels are respectively installed on the left and right sides of the needle selector frame, a panel is installed above the needle selector frame, a circuit board is installed below the needle selector frame, a wire package is installed in the needle selector frame, one end of the wire package is electrically connected to the circuit board, and a magnet is provided at the other end of the wire package. The needle selector is movably installed on the needle selector frame. There are 10 needle selectors in total, a cutter head is provided at one end of the needle selector, and a magnet is provided at the other end of the needle selector. The end with the cutter head extends out of the panel, and the end of the needle selector with the magnet is arranged opposite to the end of the wire package with the magnet.

[0005] When the needle selector is working, the up and down movement of the cutter head is achieved by changing the direction of the coil's power supply. When the cutter head moves up and down, heat is easily generated due to friction. When the needle selector textile machinery is working, continuous up and down movement can easily cause heat accumulation inside the needle selector. When the temperature inside the needle selector rises, it can easily cause the temperature of the magnetic bar inside the needle selector to rise, thereby affecting the working speed of the needle selector.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the present invention aims to provide a needle selector for an underwear machine.

[0008] The above technical purpose of the present invention is achieved through the following technical solutions: a needle selector for an underwear machine, comprising a needle selector frame, a magnetic coil assembly, a needle selection blade and a circuit board, a wire plate support portion being provided in the needle selector frame, a magnetic coil support portion being provided in the needle selector frame and being located on one side of the wire plate support portion, the magnetic coil support portion or the wire plate support portion being connected to the needle selector frame to conduct the heat energy accumulated by the circuit board or the induction coil from the inside to the outside.

[0009] By adopting the above technical solution, the wire plate support and the magnetic coil support in the needle selector frame are connected to the needle selector frame, and the wire plate support is connected to the circuit board and plays a supporting role, so that the heat generated by the operation of the electronic components on the circuit board is conducted to the needle selector frame, thereby improving the stable operation of the circuit running on the circuit board. At the same time, the magnetic coil support is connected to the needle selector frame to realize the reversal of the power direction and make the needle selector blade move back and forth at high speed under the action of magnetism. The heat can be conducted from the magnetic coil support to the needle selector frame, thereby improving the heat dissipation efficiency of the magnetic rod or coil in the needle selector, improving the heating condition of the needle selector, and improving the needle selection efficiency of the needle selector by more than 30%.

[0010] The present invention is further configured as follows: the magnetic coil support portion includes a horizontally arranged connecting portion and an isolation portion located above the connecting portion, the isolation portion is used to separate two rows of magnetic coil assemblies arranged at intervals, and the thickness of the isolation portion is less than the thickness of the connecting portion.

[0011] By adopting the above technical solution, the magnetic coil support separates the magnetic coil assemblies arranged in staggered intervals, achieving a better magnetic field isolation effect, improving the accuracy and frequency of the needle selector operation, and the thickness of the isolation part is smaller than the thickness of the connecting part, which can support the magnetic coil assembly and improve the stability of the needle selection blade operation.

[0012] The present invention is further configured as follows: the magnetic coil assembly includes an electromagnet and a heat-conducting isolation sleeve wrapped around the electromagnet, the heat-conducting isolation sleeve is detachably connected to the connecting portion, and a plurality of the electromagnets are arranged one-to-one from the circuit board toward the needle selection blade.

[0013] By adopting the above technical solution, the magnetic coil assembly is composed of an electromagnet wrapped in a heat-conducting isolation sleeve, and the heat is conducted through the heat-conducting isolation sleeve, and electromagnetic interference between adjacent electromagnets is eliminated.

[0014] The present invention is further configured as follows: the wire board support is located on one side of the needle selector frame, the wire board support is provided with a support column for threaded connection with the circuit board, and a heat dissipation cavity for accommodating heat dissipation fins is formed between the wire board support and the circuit board.

[0015] By adopting the above technical solution, the wire board support and the support column form a heat dissipation cavity between the circuit board and the wire board support, which can conduct the heat generated by the electronic components on the circuit board, so that the heat dissipation fins fit the wire board support, thereby achieving efficient conduction of the heat generated by the electronic components.

[0016] The present invention is further configured as follows: the electromagnet includes a magnetic induction coil connected to the circuit board and a rubber layer wrapped around the magnetic induction coil, and the rubber layer is integrally wrapped around the magnetic induction coil through an injection molding process.

[0017] A process for preparing a needle selector for an underwear machine, which is used to prepare the needle selector for an underwear machine, and the preparation steps include:

[0018] Die casting: die casting a frame blank on an alloy die casting machine, and integrally forming a wire plate support part and a magnetic coil support part on the frame blank;

[0019] Deburring, cleaning the surface of the frame blank obtained in the die-casting step;

[0020] Metal processing: using a milling machine and a bench drill to process the deburred frame blank to form screw holes on the magnetic coil support for connecting a plurality of magnetic coil assemblies, and to form positioning screw holes on the wire board support for connecting the circuit board, thereby obtaining the needle selector frame;

[0021] Surface treatment: After the gold processing step is completed, the surface of the needle selector frame is subjected to electric ice treatment or electroplating treatment.

[0022] In summary, the present invention has the following beneficial effects:

[0023] The wire plate support and the magnetic coil support in the needle selector frame are connected to the needle selector frame, and the wire plate support is connected to the circuit board and plays a supporting role, conducting the heat generated by the operation of the electronic components on the circuit board to the needle selector frame, thereby improving the stable operation of the circuit running on the circuit board. At the same time, the magnetic coil support is connected to the needle selector frame to realize the reversal of the power direction and make the needle selector blade move back and forth at high speed under the action of magnetism. The heat can be conducted from the magnetic coil support to the needle selector frame, thereby improving the heat dissipation efficiency of the magnetic rod or coil in the needle selector, improving the heating condition of the needle selector, and improving the needle selection efficiency of the needle selector by more than 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the needle selector frame in the present invention.

[0027] In the figure: 1. Needle selector frame; 2. Magnetic coil assembly; 21. Electromagnet; 22. Thermal isolation sleeve; 3. Needle selector blade; 4. Circuit board; 5. Wire board support; 6. Magnetic coil support; 61. Connecting part; 62. Isolation part; 7. Support column. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0029] A needle selector for an underwear machine includes a needle selector frame, a magnetic coil assembly, a needle selection blade and a circuit board. A wire plate support portion is provided in the needle selector frame. A magnetic coil support portion is formed in the needle selector frame and is located on one side of the wire plate support portion. The magnetic coil support portion or the wire plate support portion is connected to the needle selector frame to conduct heat energy accumulated by the circuit board or the induction coil from the inside to the outside.

[0030] The magnetic coil support portion includes a horizontally arranged connecting portion and an isolating portion located above the connecting portion. The isolating portion is used to separate two rows of magnetic coil assemblies arranged at intervals. The thickness of the isolating portion is smaller than that of the connecting portion.

[0031] The wire board support part is located on one side of the needle selector frame. The wire board support part is provided with a support column for threaded connection with the circuit board. A heat dissipation cavity for accommodating heat dissipation fins is formed between the wire board support part and the circuit board.

[0032] The magnetic coil assembly includes an electromagnet and a thermally conductive isolation sleeve wrapped around the electromagnet. The thermally conductive isolation sleeve is detachably connected to the connection part. Several electromagnets are arranged one by one from the circuit board toward the needle selection blade. The electromagnet includes a magnetic induction coil connected to the circuit board and a rubber layer wrapped around the outside of the magnetic induction coil. The rubber layer is wrapped around the outside of the magnetic induction coil through an injection molding process.

[0033] The wire plate support and the magnetic coil support in the needle selector frame are connected to the needle selector frame, and the wire plate support is connected to the circuit board and plays a supporting role, conducting the heat generated by the operation of the electronic components on the circuit board to the needle selector frame, thereby improving the stable operation of the circuit running on the circuit board. At the same time, the magnetic coil support is connected to the needle selector frame to realize the reversal of the power direction and make the needle selector blade move back and forth at high speed under the action of magnetism, so that the magnetic coil support can conduct heat to the needle selector frame, thereby improving the heat dissipation efficiency of the magnetic rod or coil in the needle selector, improving the heating condition of the needle selector, and increasing the needle selection efficiency of the needle selector by more than 30%. The magnetic coil support separates the magnetic coil assemblies that are staggered and arranged at intervals, achieving a better magnetic field isolation effect, improving the accuracy and frequency of the needle selector operation, and the thickness of the isolation part is less than the thickness of the connecting part, which can support the magnetic coil assembly and improve the stability of the needle selector blade operation.

[0034] The magnetic coil assembly consists of an electromagnet wrapped in a thermally conductive isolation sleeve. The thermally conductive isolation sleeve conducts heat and eliminates electromagnetic interference between adjacent electromagnets. The rubber layer is wrapped around the outside of the magnetic coil using an injection molding process, which can also have a relatively good effect on heat conduction to the outside.

[0035] A process for preparing a needle selector for an underwear machine, which is used to prepare the needle selector for an underwear machine, and the preparation steps include:

[0036] Die casting: die casting a frame blank on an alloy die casting machine, and integrally forming a wire plate support part and a magnetic coil support part on the frame blank;

[0037] Deburring, cleaning the surface of the frame blank obtained in the die-casting step;

[0038] Metal processing: using a milling machine and a bench drill to process the deburred frame blank to form screw holes on the magnetic coil support for connecting a plurality of magnetic coil assemblies, and to form positioning screw holes on the wire board support for connecting the circuit board, thereby obtaining the needle selector frame;

[0039] Surface treatment: After the gold processing step is completed, the surface of the needle selector frame is subjected to electric ice treatment or electroplating treatment.

[0040] The frame blank is formed in one piece by die-casting, which improves the overall consistency of the frame. When the magnetic coil generates heat, the heat can be quickly discharged to the outside of the frame through direct contact, which has a good heat dissipation effect. People can also obtain the working status of the needle selector by sensing the temperature of the frame and dissipate heat in time. The die-casting method can also reduce production costs from a production perspective. The work efficiency formed by die-casting is fast, which shortens the molding processing time required by the traditional lost wax casting process. In the deburring step, the metal burrs on the surface of the blank are processed to make the frame more regular.

[0041] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A needle selector for an underwear machine, characterized in that: The invention comprises a needle selector frame, a magnetic coil assembly, a needle selector blade and a circuit board. The needle selector frame is provided with a wire plate support portion, and the needle selector frame is provided with a magnetic coil support portion located on one side of the wire plate support portion. The magnetic coil support portion or the wire plate support portion is connected to the needle selector frame to conduct heat energy accumulated by the circuit board or the induction coil from the inside to the outside. The magnetic coil support portion includes a horizontally arranged connecting portion and an isolating portion located above the connecting portion, wherein the isolating portion is used to separate two rows of magnetic coil assemblies arranged in a staggered manner, and the thickness of the isolating portion is smaller than the thickness of the connecting portion; The wire board support part is located on one side of the needle selector frame, and is provided with a support column for threaded connection with the circuit board. A heat dissipation cavity for accommodating heat dissipation fins is formed between the wire board support part and the circuit board; The magnetic coil assembly includes an electromagnet and a heat-conducting isolation sleeve wrapped around the electromagnet. The heat-conducting isolation sleeve is detachably connected to the connecting portion. A plurality of the electromagnets are arranged one by one from the circuit board toward the needle selection blade.

2. The needle selector for an underwear machine according to claim 1, characterized in that: The electromagnet includes a magnetic induction coil connected to a circuit board and a rubber coating wrapped around the magnetic induction coil. The rubber coating is integrally wrapped around the magnetic induction coil through an injection molding process.

3. A process for preparing a needle selector for an underwear machine, for preparing the needle selector for an underwear machine according to claim 1 or 2, characterized in that: The preparation steps include: Die casting: die casting a frame blank on an alloy die casting machine, and integrally forming a wire plate support part and a magnetic coil support part on the frame blank; Deburring, cleaning the surface of the frame blank obtained in the die-casting step; Metal processing: using a milling machine and a bench drill to process the deburred frame blank to form screw holes on the magnetic coil support for connecting a plurality of magnetic coil assemblies, and to form positioning screw holes on the wire board support for connecting the circuit board, thereby obtaining the needle selector frame; Surface treatment: After the gold processing step is completed, the surface of the needle selector frame is subjected to electric ice treatment or electroplating treatment.

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