CN112361891A

CN112361891A - Method for manufacturing conductive target plate

Info

Publication number: CN112361891A
Application number: CN202110013073.4A
Authority: CN
Inventors: 孙立峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-02
Filing date: 2021-01-06
Publication date: 2021-02-12
Also published as: CN112254584A

Abstract

The invention discloses a manufacturing method of a conductive target plate, which comprises a target layer, a common layer and a functional layer, wherein the common layer and the functional layer are manufactured by firstly coating conductive carbon paste on the surface of a second substrate layer in a screen printing mode according to a preset pattern of a conductive block to form a conductive coating; then adopting glue to stick the back of the second base material layer to the surface of the third base material layer; and then the connecting strips coated with the conductive carbon paste are adhered to the wiring areas of the conductive coatings, and the leads are adhered to the connecting strips, so that the wiring of the conductive coatings is completed. The invention adopts a screen printing mode to print the pattern of the conducting block on the surface of the second substrate layer in a breakthrough manner, so that the surface of the second substrate layer is covered with the conducting coating with conducting performance, thereby overcoming the complex procedure that the conducting sheet needs to be additionally pasted by hands in the prior art, effectively reducing the production cost and the material cost and improving the production efficiency.

Description

Method for manufacturing conductive target plate

Technical Field

The invention relates to the technical field of target practice equipment, in particular to a manufacturing method of a conductive target plate.

Background

The target shooting is a common activity in daily training and examination of military police, and the target plate is an indispensable device in the target shooting activity. The existing target plate is usually provided with a conductive layer, and the conductive property of a bullet is utilized to instantly conduct the conductive layer when the bullet passes through the target plate so as to realize signal output and further realize automatic target reporting.

The conductive target plate is generally formed by adhering a plurality of insulating plates and a conductive sheet together, wherein the insulating plates are generally made of an insulating material with a rebound elasticity, such as an EVA (ethylene vinyl acetate) plate or a PU (polyurethane) plate, and the conductive sheet is generally made of an aluminum foil or a conductive cloth. Because the aluminum foil has poor elasticity and cannot be recovered after being punctured, the aluminum foil has short service life and low precision and is only suitable for the whole target hit type target scoring with low requirements. Compared with aluminum foil, the conductive cloth is expensive, but has better elasticity and higher precision, so that the common gunnery training target with ring number and partition precision generally adopts the conductive cloth as a conductive layer.

However, the processing technology of the conductive cloth is complicated, the conductive cloth needs to be cut into a specific shape and manually pasted on the EVA plate, the production efficiency is low, the processing precision is low, the yield is low, and the production cost is high, so that the large-scale production is difficult. In addition, in order to prevent adjacent conductive cloths from being adhered to each other or avoid short circuit of the conductive cloths caused by manual adhesion errors, 2-4mm intervals are usually reserved between the adjacent conductive cloths, the ring number resolution of the target plate can only be 1 ring, the maximum partition can only be 12 partitions, the target scoring precision is limited, and higher training requirements cannot be met.

In summary, the manufacturing cost, the production efficiency and the target reporting precision of the existing conductive target plate are all improved, and need to be improved.

Disclosure of Invention

The present invention provides a method for manufacturing a conductive target plate, which mainly aims to solve the above problems.

The invention adopts the following technical scheme:

a method for manufacturing a conductive target plate, the conductive target plate comprising a target layer, a common layer and a functional layer, the method comprising the steps of:

(1) and (3) manufacturing a target layer: printing a target-shaped pattern on the surface of the first base material layer by adopting a screen printing mode to form a target-shaped layer;

(2) manufacturing a common layer and a functional layer: coating conductive carbon paste on the surface of the second substrate layer by adopting a screen printing mode according to a preset pattern of the conductive block to form a conductive coating; then adopting glue to stick the back of the second base material layer to the surface of the third base material layer; then the connecting strips coated with the conductive carbon paste are pasted on the wiring areas of the conductive coatings, and the leads are pasted on the connecting strips, so that the wiring of the conductive coatings is completed;

(3) pasting the conductive target plate: and combining and sticking the target layer, the public layer and the functional layer according to the actual product requirements by adopting glue, and pressing by adopting a pressing machine.

Further, the first substrate layer and the third substrate layer are both EVA plates; the second base material layer is non-woven fabric, and the gram weight of the non-woven fabric is 40-120 g.

Further, in the step (2), the conductive carbon paste used for printing the conductive coating is a single-component carbon paste, and 2-10% of resistivity modifier and 6-9% of second diluent are added and mixed before the single-component carbon paste is used, and the mixture is uniformly stirred.

Further, the resistivity modifier is ultrafine copper powder or ultrafine nickel powder, and the second diluent is 783 slow-drying boiled oil water.

Further, in the step (2), the screen plate used for printing the conductive coating is a monofilament polyester silk screen plate with 50-100 meshes, the scraper is used for scraping by 75-degree polyurethane glue, and after printing is finished, the screen plate needs to be naturally dried for 30-45min or placed in hot air at 60 ℃ for drying for 10-15min, so that the surface of the printing ink is ensured to be dry.

Further, in the step (2), firstly, high-elasticity ink is coated on the surface of the third substrate layer by adopting a screen printing mode according to a preset pattern of the conductive blocks, so that an elastic coating is formed at the corresponding position of each conductive block; and then adhering the second base material layer printed with the conductive coating to the surface of the third base material layer, so that the conductive coating is positioned right above the elastic coating.

Furthermore, the high-elasticity ink used for printing the elastic coating is high-elasticity rubber ink or high-elasticity nylon ink, and 5-8% of first diluent and 2-5% of crosslinking catalyst are added and mixed before the high-elasticity ink is used, and the mixture is uniformly stirred.

Furthermore, the screen plate used for printing the elastic coating is a 200-mesh polyester silk screen plate, the scraper is a 75-degree polyurethane adhesive scraper, and after printing is finished, the screen plate needs to be naturally dried for 30-45min or placed under 60 ℃ hot air for drying for 15-20min to ensure that the surface of the printing ink is dry.

Further, in the step (1), the ink used for printing the target-shaped pattern is water-based silk-screen ink, and 0.05-0.1% of toner, 2-7% of purified water, 1-5% of cross-linking agent and 2-4% of slow-drying agent are added for mixing and stirring uniformly before the ink is used; the screen plate is a 300-mesh polyester silk screen plate, the scraper is a 75-degree polyurethane adhesive scraper, and after printing is finished, the screen plate needs to be placed under hot air at 80 ℃ for drying for 3-5min to ensure that the surface of the printing ink is dry.

Further, in the step (3), the glue used for adhering the conductive target plate is polyolefin glue, and the used laminating machine is a roller-type or flat-plate-type laminating machine.

Further, the method also comprises the following steps: (4) and (3) testing: and placing the conductive target plate on a professional test fixture to test the conduction resistance value of each conductive coating, and if the conductive target plate is qualified, inserting the conductive target plate off line, otherwise, performing rework or scrap treatment.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention adopts a screen printing mode to print the pattern of the conducting block on the surface of the second substrate layer in a breakthrough manner, so that the surface of the second substrate layer is covered with the conducting coating with conducting performance, thereby overcoming the complex procedure that the conducting sheet needs to be additionally pasted by hands in the prior art, effectively improving the production efficiency and reducing the production cost and the material cost. In addition, the silk-screen printing has the advantages of strong ink layer covering capability, high adhesive force, easiness in control, high printing precision and the like, so that the production difficulty of the conductive target plate can be effectively reduced, the processing precision and the production yield of the conductive target plate are improved, the production process of the conductive target plate is optimized essentially, and the large-scale production of the conductive target plate can be realized.

2. The combined design of the second substrate layer, the third substrate layer and the elastic coating effectively improves the elasticity of the conductive coating, overcomes the problems of thinness, brittleness and easy damage of the conductive coating, ensures that the conductive coating has high-quality elasticity as the conductive cloth, can quickly recover after medium bounce, has good durability, long service life and high target reporting precision, reduces the cost by more than ten times compared with the conductive cloth, and fundamentally solves the problem of high production cost of the conventional conductive target plate.

3. The invention takes single-component carbon paste as a base material, uses the ultramicro copper powder or the ultramicro nickel powder to adjust the square resistivity, and realizes the printing of the conductive coating through strict control screen printing technology, and can manufacture a finished conductive target plate meeting the resistivity requirement according to the characteristics of target-reporting detection circuits of different target machines in actual production.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partial cross-sectional view of a common or functional layer in accordance with the present invention.

Detailed Description

The following describes specific embodiments of the present invention. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details.

Referring to fig. 1 and 2, a method for manufacturing a conductive target plate, the conductive target plate 1 includes a target layer 11, a common layer 12 and a functional layer, and preferably: the functional layer of the present embodiment includes a partition layer 13 and a ring number layer 14, and the partition layer 13, the common layer 12 and the ring number layer 14 are sequentially disposed on the back surface of the target layer 11 in this order. The manufacturing method of the conductive target plate 1 comprises the following steps:

(1) fabrication of the target layer 11: printing a target-shaped pattern on the first base material layer by adopting a screen printing mode to form a target-shaped layer 11;

(2) common layer 12 and functional layer fabrication: coating conductive carbon paste on the surface of the second substrate layer 121 according to a preset pattern of the conductive block by adopting a screen printing mode to form a conductive coating 122; then, the back surface of the second substrate layer 121 is adhered to the surface of the third substrate layer 123 by glue; then, the connecting strip 15 coated with the conductive carbon paste is adhered to the wiring area of each conductive coating 122, and the lead is adhered to the connecting strip 15, thereby completing the wiring of each conductive coating 122;

(3) and (3) pasting the conductive target plate 1: and combining and sticking the target layer 11, the public layer 12 and the functional layer according to the actual product requirements by adopting glue, and pressing by adopting a pressing machine.

(4) And (3) testing: and placing the conductive target plate 1 on a professional test fixture to test the conduction resistance value of each conductive coating 122, and if the conductive target plate is qualified, inserting the conductive target plate off line, otherwise, performing rework or scrap treatment.

With reference to fig. 1 and 2, in particular, as a preferred solution: the first substrate layer, the third substrate layer 123 and the connecting strip 15 are formed by cutting EVA plates with high resilience; the second substrate layer 121 is formed by cutting a non-woven fabric, and the grammage of the non-woven fabric is 40-120g, so that the elasticity of the conductive target plate 1 can be fully ensured, the conductive target plate can rebound rapidly after middle bounce, and the service life of the conductive target plate 1 is further prolonged.

Referring to fig. 1 and 2, specifically, in step (1), the ink used for printing the target pattern is water-based silk-screen ink, and 0.1% of toner, 5% of purified water, 3% of cross-linking agent and 3% of slow-drying agent are added and mixed before the ink is used, and the mixture is stirred uniformly. Before printing, the screen plate is designed and manufactured according to the actually required target-shaped pattern, the target-shaped pattern can be a breast target shape, a half-body target shape, a multi-ring target shape or a human target shape, and the target-shaped pattern selected by the embodiment is the breast target shape. The screen used for printing is a 300-mesh polyester silk screen, and the scraper used is a 75-degree polyurethane adhesive scraper. And during printing, the first substrate layer is positioned by a profiling mold, the positioning precision of not less than +/-1 mm is ensured, and after printing is finished, the first substrate layer is dried for 3-5min by being placed under hot air at 80 ℃ to ensure that the surface of the printing ink is dry.

Referring to fig. 1 and 2, specifically, in step (2), firstly, a screen printing method is adopted to coat a high-elasticity ink on the surface of the third substrate layer 123 according to a preset pattern of the conductive blocks, so that an elastic coating 124 is formed at a corresponding position of each conductive block; next, the second substrate layer 121 printed with the conductive coating 122 is bonded to the surface of the third substrate layer 123, so that the conductive coating 122 is located right above the elastic coating 124. From this point of view, the structure of the common layer 12 and the functional layer sequentially includes a third substrate layer 123, an elastic coating layer 124, a glue layer 125, a second substrate layer 121, and a conductive coating layer 122 from bottom to top. The design can further improve the resilience performance of the conductive coating 122, so that the conductive coating has high-quality elasticity the same as that of conductive cloth and can be quickly recovered after medium bounce.

Referring to fig. 1 and 2, more specifically, the high elasticity ink used for printing the elastic coating layer 124 is a high elasticity rubber ink or a high elasticity nylon ink, and in this embodiment, the high elasticity rubber ink is selected, and 8% of the first diluent and 5% of the crosslinking catalyst are added and mixed before being used, and are uniformly stirred. Before printing, the screen plate is designed and manufactured according to the actually required pattern of the conductive block, wherein the conductive block pattern of the common layer 12 is designed according to the target-shaped pattern of the target-shaped layer 11, and the conductive block pattern of the functional layer is designed according to the actually required hit-reporting precision requirement. The screen plate used for printing is a 200-mesh polyester silk screen plate, the scraper used for printing is a 75-degree polyurethane adhesive scraper, the third substrate layer 123 is positioned by a profiling mold during printing, the positioning accuracy of not less than +/-1 mm is guaranteed, and after printing is finished, the third substrate layer needs to be naturally dried for 30-45min or placed in hot air at 60 ℃ for drying for 15-20min, so that the surface drying of the printing ink is guaranteed.

Referring to fig. 1 and 2, specifically, in step (2), the conductive carbon paste used for printing the conductive coating 122 is a single-component carbon paste, and 8% of the resistivity modifier and 7% of the second diluent are added to be stirred and mixed before the single-component carbon paste is used, and the resistivity of the single-component carbon paste is adjusted to a desired value. The resistivity modifier used in this example was ultra-fine copper powder and the second diluent used was 783 slow-drying boiled oil water. Before printing, according to the actual required printing pattern design and manufacturing screen plate, the patterns of the conductive coating 122 of the common layer 12 and the functional layer are respectively designed according to the patterns of the elastic coating 124, and the area of each elastic coating 124 is ensured to be slightly larger than that of the conductive coating 122, so that the self-restorability of the elastic hole is ensured, and the conductive coating has the elasticity similar to that of the conductive cloth. The screen used for printing is a 80-mesh monofilament polyester silk screen plate, and the scraper used is 75-degree polyurethane glue scraping. During printing, the second substrate layer 121 is positioned by a profiling mold, the positioning accuracy of not less than +/-1 mm is guaranteed, and after printing is finished, the second substrate layer needs to be naturally dried for 30-45min or placed in hot air at 60 ℃ for drying for 10-15min, so that the surface drying of the printing ink is guaranteed.

Referring to fig. 1 and 2, specifically, in step (2), after the conductive coating 122 is printed, glue is coated on the back surface of the second substrate layer 121 and the surface of the third substrate layer 123, and then the two are bonded. The glue used in the process is polyolefin glue.

Referring to fig. 1 and 2, specifically, in step (2), during wiring, a conductive carbon paste may be applied to the surface of the connecting bar 15 by screen printing or any spraying method to make it conductive. When connecting the leads, it is necessary to stick the leads to the connecting strip 15 with a conductive adhesive tape to ensure good contact.

Referring to fig. 1 and 2, specifically, in step (3), when the conductive target plate 1 is pasted, glue is respectively coated on the surfaces of the target layer 11, the partition layer 13, the common layer 12 and the loop layer 14, the paste is pasted according to a combination sequence of actual requirements after being dried for 5min at room temperature, and finally, a laminating machine is adopted for press compounding. The glue used in the process is polyolefin glue, and the used pressing machine is a roller type or flat plate type pressing machine.

Specifically, in step (4), a set of copper test probes is designed in the fixture, each conductive coating is covered by 1 probe, and the program control probes sequentially puncture the target plate and detect the on-resistance value of the target plate.

Referring to fig. 1 and 2, in particular, in the embodiment, the partition layer 13 adopts an 8-partition design, each partition is an independent conductive block, and each conductive block is sequentially coated with an elastic coating 124 and a conductive coating 122; the loop number layer 14 is a 5-loop chest loop design, each chest loop region is an independent conductive block, and each conductive block is sequentially coated with an elastic coating 124 and a conductive coating 122.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.

Claims

1. A method for manufacturing a conductive target plate, the conductive target plate comprising a target layer, a common layer and a functional layer, the method comprising: the manufacturing method of the conductive target plate comprises the following steps:

2. The method of claim 1, wherein the step of forming a conductive target comprises: the first substrate layer and the third substrate layer are both EVA plates; the second base material layer is non-woven fabric, and the gram weight of the non-woven fabric is 40-120 g.

3. The method of claim 1, wherein the step of forming a conductive target comprises: in the step (2), the conductive carbon paste used for printing the conductive coating is a single-component carbon paste, and 2-10% of resistivity regulator and 6-9% of second diluent are added and mixed before the single-component carbon paste is used, and the mixture is uniformly stirred.

4. A method of making a conductive target plate according to claim 3, wherein: the resistivity regulator is ultrafine copper powder or ultrafine nickel powder, and the second diluent is 783 slow-dry boiled oil water.

5. The method of claim 1, wherein the step of forming a conductive target comprises: in the step (2), the screen plate used for printing the conductive coating is a 50-100 mesh monofilament polyester silk screen plate, the scraper is a 75-degree polyurethane adhesive scraper, and after printing is finished, the screen plate needs to be naturally dried for 30-45min or placed in hot air at 60 ℃ for drying for 10-15min, so that the surface drying of the ink is ensured.

6. The method of claim 1, wherein the step of forming a conductive target comprises: in the step (2), firstly, high-elasticity ink is coated on the surface of the third substrate layer by adopting a screen printing mode according to the pattern of the preset conductive block, so that an elastic coating is formed at the corresponding position of each conductive block; and then adhering the second base material layer printed with the conductive coating to the surface of the third base material layer, so that the conductive coating is positioned right above the elastic coating.

7. The method of claim 6, wherein the step of forming a conductive target comprises: the high-elasticity ink used for printing the elastic coating is high-elasticity rubber ink or high-elasticity nylon ink, and 5-8% of first diluent and 2-5% of crosslinking catalyst are added for mixing and stirring uniformly before the high-elasticity ink is used.

8. The method of claim 6, wherein the step of forming a conductive target comprises: the screen plate used for printing the elastic coating is a 200-mesh polyester silk screen plate, the scraper is a 75-degree polyurethane adhesive scraper, and after printing is finished, the screen plate needs to be naturally dried for 30-45min or placed in hot air at 60 ℃ for drying for 15-20min to ensure that the surface of the printing ink is dry.

9. The method of claim 1, wherein the step of forming a conductive target comprises: in the step (1), the ink used for printing the target-shaped pattern is water-based silk-screen ink, and 0.05-0.1% of toner, 2-7% of purified water, 1-5% of cross-linking agent and 2-4% of slow-drying agent are added for mixing and stirring uniformly before the ink is used; the screen plate is a 300-mesh polyester silk screen plate, the scraper is a 75-degree polyurethane adhesive scraper, and after printing is finished, the screen plate needs to be placed under hot air at 80 ℃ for drying for 3-5min to ensure that the surface of the printing ink is dry.

10. The method of claim 1, wherein the step of forming a conductive target comprises: also comprises the following steps: (4) and (3) testing: and placing the conductive target plate on a professional test fixture to test the conduction resistance value of each conductive coating, and if the conductive target plate is qualified, inserting the conductive target plate off line, otherwise, performing rework or scrap treatment.