Material sheet printing positioning jig for alloy resistor production

Abstract

The utility model discloses a positioning jig for sheet printing for alloy resistor production, which comprises a base plate and a cover plate, the cover plate is detachably connected with the top surface of the base plate in a magnetic attraction manner, and a plurality of shielding barrier strips at intervals are arranged in the middle of the surface of the cover plate in an array manner; the middle of the top face of the base plate is concaved inwards to form a cuboid-shaped containing groove, the middle of the bottom face of the base plate is concaved inwards to form a cuboid-shaped sealing plate groove, the sealing plate groove is sealed through a detachable sealing plate, and the middle of the surface of the sealing plate groove is concaved inwards to form a cuboid-shaped vacuum cavity. An adsorption air channel which vertically penetrates through the containing groove and the vacuum cavity is formed in the middle of the interior of the base plate, a connector which can be communicated with the vacuum cavity is arranged on the sealing plate, and the connector is used for being externally connected with a vacuum pump. The character printing device is simple in structure and reasonable in design, and can ensure the accuracy of character printing work so as to ensure the quality of resistors.

Description

Technical Field

[0001] The utility model relates to the technical field of alloy resistor production, in particular to a positioning jig for printing sheet materials used in alloy resistor production. Background Art

[0002] Alloy resistors refer to resistors that use alloys as current media. They have the characteristics of low resistance, high precision, low temperature coefficient, resistance to impact current, and high power. They are widely used in precision instruments, military resistors, aerospace electronics, new energy photovoltaic resistors, automobiles, etc.

[0003] The production process of alloy resistors is generally divided into the following steps: sheet stamping, laser resistor repair, epoxy molding, plastic molding channel removal, surface sandblasting, code printing, curing, and pelletizing. Among them, during the code printing work, the resistors on the sheet need to be printed with corresponding codes to identify the resistors.

[0004] When printing characters on one side of the sheet, the character ink printed on the resistor surface of the sheet is not solidified. Do not allow the unsolidified characters to come into contact with other objects. Because the sheet is a thin strip, it is difficult to determine the placement of the sheet and it is easy to make mistakes. If it is not placed properly, quality problems such as character scratches and false printing will occur. Utility Model Content

[0005] The purpose of the utility model is to provide a positioning jig for printing sheet materials used in alloy resistor production, so as to solve the problems mentioned in the above background technology.

[0006] To achieve the above purpose, the present invention adopts the following contents:

[0007] The utility model provides a positioning jig for printing sheet materials for alloy resistor production, which includes a base plate and a cover plate. The cover plate is detachably connected to the top surface of the base plate by magnetic attraction, and a plurality of spaced shielding bars are arranged in an array in the middle of the surface of the cover plate.

[0008] The top surface of the substrate is recessed inwardly to form a rectangular placement groove, and the bottom surface of the substrate is recessed inwardly to form a rectangular sealing plate groove. The sealing plate groove is sealed by a detachable sealing plate, and the surface of the sealing plate groove is recessed inwardly to form a rectangular vacuum cavity.

[0009] An adsorption air channel is formed in the middle of the substrate and passes through the placement groove and the vacuum cavity from top to bottom. The sealing plate is provided with a connector that can communicate with the vacuum cavity, and the connector is used for connecting an external vacuum pump.

[0010] Furthermore, the placement slot is provided with a plurality of pinholes on both sides, each containing upwardly protruding positioning pins. The top surfaces of the positioning pins do not extend beyond the top surface of the substrate. The positioning pins accurately and stably secure the sheet within the placement slot, and the positioning pins do not affect the closing of the cover plate and the substrate, thus preventing the positioning pins from causing the cover plate to move.

[0011] Furthermore, the surface of the sealing plate groove is provided with a plurality of pin holes around its perimeter, and a plurality of through holes corresponding in number and position to the pin holes are provided on the surface of the sealing plate. The pin holes and through holes are fixedly connected by connecting pins. The fixed cooperation of the pin holes, through holes, and connecting pins facilitates the rapid assembly of the sealing plate, ensuring that the sealing plate can accurately cover the vacuum chamber.

[0012] Furthermore, a sealing strip is provided on the surface of the sealing plate to ensure airtightness between the sealing plate and the sealing plate groove, thereby ensuring the vacuum effect when the vacuum chamber is working.

[0013] Furthermore, the surface of the base plate is recessed with a plurality of circular mounting holes, and magnets are arranged in the mounting holes. In this way, the magnets are concealedly mounted on the surface of the base plate and do not affect the closing action of the cover plate.

[0014] Furthermore, the four corners of the placement slot are all provided with rounded supplementary angles. Due to manufacturing problems, the four corners of the placement slot are difficult to be processed into right angles that match the four corners of the sheet, so the four right angles of the sheet are adapted by rounded supplementary angles.

[0015] Furthermore, through mounting screw holes are provided on both sides of the surface of the base plate, so as to facilitate fixing the base plate on the machine by screws and also facilitate disassembly.

[0016] Furthermore, the center of the placement groove, the center of the sealing groove and the center of the vacuum chamber are consistent. In this way, the structural center of the positioning fixture is consistent, which can ensure stability during the processing.

[0017] Compared with the existing technology, the utility model has the following technical effects: the utility model has a simple structure and a reasonable design; the front of the sheet is placed in the placement groove, the connector on the sealing plate is externally connected to a vacuum pump, the vacuum pump is used to evacuate the vacuum chamber, and the sheet is firmly adsorbed in the placement groove by the adsorption air duct, and finally the cover plate is closed on the top surface of the substrate, and the shielding baffle is made to correspond to the connecting ribs on the sheet so that the resistor surface on the sheet is fully exposed, and then the character printing work is carried out. The sheet can be taken out only after the printing is completed and the sheet is left to stand for a period of time, thereby ensuring the accuracy of the character printing work and thus ensuring the quality of the resistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic top view of a substrate of a positioning jig for printing a sheet for alloy resistor production according to an embodiment of the present invention;

[0020] Figure 2 This is a bottom view of a positioning jig for printing a sheet for alloy resistor production according to an embodiment of the present invention, relative to a substrate;

[0021] Figure 3 This is a schematic diagram of a cover plate of a positioning jig for printing a sheet for alloy resistor production according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of a positioning jig for printing sheet materials for alloy resistor production according to an embodiment of the present invention, with respect to a substrate and a sealing plate;

[0023] 1-substrate, 2-cover, 10-placement slot, 20-sealing slot, 30-sealing plate, 40-vacuum chamber, 11-mounting hole, 12-magnet, 13-mounting screw hole, 21-shielding bar, 101-adsorption air channel, 102-pinhole, 103-circular supplementary angle, 201-pin hole, 301-connector, 302-through hole, 303-sealing strip. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the following specific description is illustrative rather than restrictive and should not limit the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] See also Figures 1 to 4 The present invention provides a positioning jig for printing sheet materials used in alloy resistor production, comprising a substrate 1 and a cover plate 2 of substantially identical length and width. The cover plate 2 is detachably connected to the top surface of the substrate 1 by magnetic attraction. A plurality of spaced shielding bars 21 are arranged in an array in the middle of the surface of the cover plate 2. The size and spacing of the shielding bars are reasonably adjusted according to the distribution of the resistors on the sheet material.

[0027] The middle of the top surface of the substrate 1 is recessed inward to form a rectangular placement groove 10, and the middle of the bottom surface of the substrate 1 is recessed inward to form a rectangular sealing plate groove 20. The sealing plate groove 20 is closed by a detachable sealing plate 30, and the middle of the surface of the sealing plate groove 20 is recessed inward to form a rectangular vacuum chamber 40.

[0028] An adsorption air channel 101 is formed in the middle of the substrate 1 and passes through the placement groove 10 and the vacuum chamber 40 from top to bottom. A connector 301 that can communicate with the vacuum chamber 40 is provided on the sealing plate 30. The connector 301 is used to connect to an external vacuum pump (not shown).

[0029] During use, place the front of the sheet in the placement groove 10, fix the sealing plate 30 in the sealing plate groove 20, connect the connector 301 on the sealing plate 30 to the vacuum pump, use the vacuum pump to evacuate the vacuum chamber 40, and use the adsorption air channel 101 to firmly adsorb the sheet in the placement groove 10, finally cover the cover plate 2 on the top surface of the substrate 1, and make the shielding baffle 21 correspond to the connecting rib on the sheet so that the surface of the resistor on the sheet is fully exposed, and then carry out the character printing work. After the printing is completed, let it stand for a period of time before taking out the sheet, so as to ensure the accuracy of the character printing work and thus ensure the quality of the resistor.

[0030] The placement slot 10 is provided with a plurality of pinholes 102 on both sides. Positioning pins (not shown) are positioned within the pinholes 102, with the top surfaces of the pins not protruding beyond the top surface of the substrate. The pins secure the sheet accurately and stably within the placement slot, and the pins do not interfere with the closing of the cover plate and substrate, preventing the pins from causing the cover plate to move.

[0031] The sealing plate groove 20 is surrounded by a plurality of pin holes 201, and the sealing plate 30 is provided with a plurality of through holes 302 corresponding in number and position to the pin holes 201. Connecting pins (not shown) securely connect the pin holes 201 and the through holes 302. The secure fit of the pin holes, through holes, and connecting pins facilitates quick assembly of the sealing plate, ensuring that the sealing plate accurately covers the vacuum chamber.

[0032] The surface of the sealing plate 30 is provided with a circle of sealing strips 303. The sealing strips are used to ensure the airtightness of the sealing plate after contacting the sealing plate groove, thereby ensuring the vacuum effect when the vacuum chamber is working.

[0033] The surface of the base plate 1 is concavely provided with a plurality of circular mounting holes 11, and magnets 12 are arranged in the mounting holes 11. In this way, the magnets are concealedly installed on the surface of the base plate and do not affect the closing action of the cover.

[0034] Among them, the four corners of the placement groove 10 are all provided with rounded supplementary angles 103. Due to manufacturing problems, the four corners of the placement groove are difficult to be processed into right angles matching the four corners of the material sheet, so the four right angles of the material sheet are adapted by rounded supplementary angles.

[0035] Wherein, both sides of the surface of the base plate 1 are provided with through mounting screw holes 13. This facilitates fixing the base plate on the machine by screws and also facilitates disassembly.

[0036] The center of the placement groove 10, the center of the sealing plate groove 20 and the center of the vacuum chamber 40 are consistent. In this way, the structural center of the positioning fixture is consistent, which can ensure stability during the processing.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A positioning jig for printing sheet for alloy resistor production, characterized in that: It includes a base plate and a cover plate, wherein the cover plate is detachably connected to the top surface of the base plate by magnetic attraction, and a plurality of spaced shielding bars are arranged in an array in the middle of the surface of the cover plate; The top surface of the substrate is recessed inwardly to form a rectangular placement groove, and the bottom surface of the substrate is recessed inwardly to form a rectangular sealing plate groove. The sealing plate groove is sealed by a detachable sealing plate, and the surface of the sealing plate groove is recessed inwardly to form a rectangular vacuum cavity. An adsorption air channel is formed in the middle of the substrate and passes through the placement groove and the vacuum cavity from top to bottom. The sealing plate is provided with a connector that can communicate with the vacuum cavity, and the connector is used for connecting an external vacuum pump.

2. A positioning jig for printing sheet for alloy resistor production according to claim 1, characterized in that: A plurality of pinholes are provided on both sides of the placement groove, and upwardly protruding positioning pins are provided in the pinholes, and the top ends of the positioning pins do not exceed the top surface of the substrate.

3. The positioning jig for printing sheet for alloy resistor production according to claim 1, characterized in that: A plurality of pin holes are arranged around the surface of the sealing plate groove, and a plurality of through holes corresponding to the number and position of the pin holes are arranged on the surface of the sealing plate, and the pin holes are fixedly connected to each other through holes by connecting pins.

4. The positioning jig for printing sheet for alloy resistor production according to claim 1, characterized in that: A circle of sealing strips is provided on the surface of the sealing plate.

5. The positioning jig for printing sheet for alloy resistor production according to claim 1, characterized in that: The surface of the base plate is concavely provided with a plurality of circular mounting holes around it, and magnets are arranged in the mounting holes.

6. The positioning jig for printing sheet for alloy resistor production according to claim 1, characterized in that: The four corners of the placement groove are all provided with rounded supplementary angles.

7. The positioning jig for printing sheet for alloy resistor production according to claim 1, characterized in that: Both sides of the surface of the base plate are respectively provided with through mounting screw holes.

8. The positioning jig for printing sheet for alloy resistor production according to claim 1, characterized in that: The center of the placement groove, the center of the sealing groove and the center of the vacuum chamber are consistent.

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