Micro-hole nozzle processing mold and method

Abstract

The present invention discloses a microporous nozzle processing mold, comprising a lower mold, an upper mold that can be raised and lowered relative to the lower mold, and a mold cavity that can be raised and lowered relative to the lower mold, the mold cavity is located between the upper mold and the lower mold, a needle mold is installed at the lower end of the upper mold, the bottom of the needle mold is in an inverted cone shape, a needle tool is provided at the cone angle of the needle mold, a blank through hole is provided at the mold cavity at a position directly opposite to the needle mold, a blank molding cavity can be formed between the lower mold, the blank through hole and the needle mold, and powder can be placed in the blank molding cavity. A microporous nozzle processing method, using the above-mentioned microporous nozzle processing mold, forming a microporous nozzle blank semi-finished product with a certain taper angle in the blank molding cavity, the microporous nozzle blank semi-finished product is sintered, and then ground and polished to obtain a microporous nozzle product. This processing method does not require a large mold for processing and molding, which not only reduces production costs, but also improves production efficiency and facilitates mass production.

Description

Technical Field

[0001] The invention relates to the technical field of nozzle processing, and in particular to a micro-hole nozzle processing mold and method. Background Art

[0002] The nozzle, also known as the nozzle, is a key component in many types of spraying, misting, oil spraying, sand blasting, spraying and other equipment.

[0003] Laser soldering equipment and dispensing packaging equipment are increasingly used in the electronic circuit and optical / electronic device industries, and one of the core components of laser soldering equipment and electronic dispensing packaging equipment is the carbide solder ball welding nozzle and dispensing nozzle. The nozzle material has high hardness and precise structural dimensions, and the processing and manufacturing are difficult and technically demanding, especially the nozzle micro-hole processing, which has a small aperture and high requirements for smoothness and concentricity.

[0004] At present, the commonly used methods for processing nozzle micro-channels include electrospark machining, laser beam machining, mechanical micro-perforation, solution etching, LIGA technology and ultrasonic machining. Although these technologies have their own processing and manufacturing advantages, they have problems such as high equipment requirements, expensive processing costs, low production efficiency and poor consistency. When it is necessary to produce a micro-hole nozzle with a certain taper angle, the common method is to first use a mold or equipment to process the micro-hole nozzle, and then process the taper angle of the micro-hole nozzle. This method of processing the micro-hole nozzle in two main steps greatly affects the production efficiency of the product, and also has a certain impact on the quality of the nozzle. Summary of the invention

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a micro-hole nozzle processing mold and method, which are simple to operate and can directly process and form a nozzle with a large inlet and outlet taper angle and a small aperture.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A micro-hole nozzle processing method comprises a lower die, an upper die which can be raised and lowered relative to the lower die, and a die cavity which can be raised and lowered relative to the lower die, the die cavity being located between the upper die and the lower die, a needle die being installed at the lower end of the upper die, the bottom of the needle die being in an inverted cone shape, a needle tool being arranged at the cone angle of the needle die, a blank through hole being arranged in the die cavity at a position facing the needle die, a blank forming cavity being formed between the lower die, the blank through hole and the needle die, and powder material being arranged in the blank forming cavity.

[0008] As an improvement of the above technical solution, an avoidance groove is provided on the upper surface of the lower mold, and the avoidance groove is located directly below the needle.

[0009] As an improvement of the above technical solution, the upper mold and the mold cavity can be moved away from or closer to each other.

[0010] As an improvement of the above technical solution, the taper angle of the bottom of the needle mold is greater than 80 degrees.

[0011] A micro-hole nozzle processing method, the method adopts the above-mentioned micro-hole nozzle processing mold, comprising the following steps:

[0012] Step 1: insert the lower die into the lower part of the through hole of the blank, and form a feeding groove between the top surface of the lower die and the through hole of the blank;

[0013] Step 2: Add the powder into the feeding trough in step 1, move the upper die downward, insert the needle die into the upper part of the through hole of the blank, and the needle die presses the powder in the feeding trough, forming a blank forming cavity between the lower die, the through hole of the blank and the needle die;

[0014] Step 3: The pressure of the needle mold is 80-150 MPa, and the pressure is maintained for not less than 5 minutes to obtain a semi-finished microporous nozzle blank;

[0015] Step 4: The mold cavity is moved downward until the upper surface of the mold cavity is flush with the upper surface of the semi-finished micro-hole nozzle blank;

[0016] Step 5: The upper mold moves upward to the needle mold to separate the micro-hole nozzle blank semi-finished product;

[0017] Step 6, moving the mold cavity upward or downward until the mold cavity is separated from the microporous nozzle blank semi-finished product, and then sintering the microporous nozzle blank semi-finished product;

[0018] Step seven, obtaining a micro-hole nozzle blank.

[0019] As an improvement of the above technical solution, the following steps are also included between step six and step seven: grinding and polishing the semi-finished micro-pore nozzle blank.

[0020] As an improvement of the above technical solution, in step three, the micropore diameter of the micropore nozzle blank semi-finished product is at least 0.05 mm.

[0021] As an improvement of the above technical solution, the powder is cemented carbide powder.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a micro-hole nozzle processing mold, in which the needle mold adopts an inverted cone structure, and the needle tool is installed on the needle mold. The needle mold drives the needle tool to press down to the blank through hole of the lower mold and form a blank forming cavity with the lower mold. The needle tool uses a small diameter to compress the powder in the blank forming cavity through the needle mold to directly form a nozzle blank with a certain taper angle and micropores. A micro-hole nozzle processing method using the above-mentioned micro-hole nozzle processing mold is used to form a micro-hole nozzle blank semi-finished product with a certain taper angle in the blank forming cavity. The micro-hole nozzle blank semi-finished product is sintered, and then ground and polished to obtain a micro-hole nozzle product. This processing method does not require a large mold for processing and forming, and avoids the disadvantages of high difficulty, low efficiency, and poor consistency of micro-hole nozzle processing methods such as electric spark and laser, which not only reduces production costs, but also improves production efficiency and facilitates mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, wherein:

[0025] Figure 1 It is a structural schematic diagram of a micro-hole nozzle processing mold according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A partial enlarged view of the lower die in FIG.

[0027] Figure 3 Schematic diagram of the structure of the micro-hole nozzle blank in the embodiment of the present invention. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] See also Figure 1 and Figure 2 A micro-hole nozzle blank processing mold of the present invention comprises a lower mold 4, an upper mold 1 that can be lifted and lowered relative to the lower mold 4, and a mold cavity 3 that can be lifted and lowered relative to the lower mold 4, the mold cavity 3 is located between the upper mold 1 and the lower mold 4, a needle mold 2 is installed at the lower end of the upper mold 1, the bottom of the needle mold 2 is in an inverted cone shape, a needle 21 is provided at the cone angle of the needle mold 2, the mold cavity 3 is provided with a blank through hole 31 at a position facing the needle mold 2, a blank molding cavity can be formed between the lower mold 4, the blank through hole 31 and the needle mold 2, and a powder 5 can be placed in the blank molding cavity. It should be understood that in the present invention, the upper mold 1 and the mold cavity 3 can be far away from or close to each other.

[0033] See also Figure 2 In the present application, in order to prevent the needle mold 2 and the needle tool 21 from touching the upper surface of the lower mold 4 when the needle mold 2 and the needle tool 21 descend synchronously to press the alloy powder, thereby causing the needle tool 21 to be hard damaged, and to ensure that the upper and lower ends of the middle part of the nozzle blank can pass through the hole smoothly, an avoidance groove 41 is opened on the upper surface of the lower mold 4, and the avoidance groove 41 is located directly below the needle tool 21.

[0034] In this embodiment, the upper mold 1 is connected to a press, which can drive the upper mold 1 to rise and fall relative to the lower mold 4. At least one push rod is vertically arranged on the upper end surface of the mold cavity 3. The push rod passes through the upper mold 1 up and down, and the top of the push rod is connected to the output end of the cylinder. It should be understood that the cylinder can drive the push rod to push or pull the mold cavity 3 down or up.

[0035] It should be understood that in order to match and process a nozzle blank with a certain taper angle, the bottom of the needle mold 2 is designed to be an inverted cone, and the taper angle of the bottom of the needle mold 2 matches the taper angle of the nozzle blank to be processed. In addition, a needle tool 21 is provided at the taper angle of the needle mold 2, that is, a micro-channel mold for processing a micro-pore nozzle blank is provided, and the size of the needle tool 21 matches the channel size of the micro-pore nozzle to be processed.

[0036] Furthermore, in this embodiment, in order to match the nozzle blank with a large taper angle to be processed, the taper angle of the bottom of the needle mold 2 is greater than 80 degrees.

[0037] In addition, see further Figure 1 In this embodiment, a base 5 is installed at the lower end of the lower mold 4, and guide pillars are fixedly installed at both the left and right ends of the base 5. The upper mold 1 and the mold cavity 3 are both slidably mounted on the guide pillars. A spring is mounted on the guide pillar, and the spring clip is arranged between the mold cavity 3 and the base. Obviously, by setting the guide pillar and the upper mold 1 and the mold cavity 3 are both slidably mounted on the guide pillars, the upper mold 1 and the mold cavity 3 can slide up and down along the guide pillars to realize the function that the upper mold 1 and the mold cavity 3 can move away from or approach each other, ensuring that the needle mold 2 is accurately positioned to the blank through hole 31 in the mold cavity 3 when the upper mold 1 is pressed down, and forms a blank molding cavity with the mold cavity 3.

[0038] See also Figure 1 and Figure 3 The present invention provides a micro-hole nozzle processing method, using the above-mentioned micro-hole nozzle processing mold, comprising the following steps:

[0039] Step 1: The lower die 4 is inserted into the lower part of the blank through hole 31, and a feeding groove is formed between the top surface of the lower die 4 and the blank through hole 31;

[0040] Step 2: Add the powder 5 into the feeding trough in step 1, move the upper mold 1 downward, insert the needle mold 2 into the upper part of the blank through hole 31, and the needle mold 2 presses the powder 5 in the feeding trough, and a blank forming cavity is formed between the lower mold 4, the blank through hole 31 and the needle mold 2;

[0041] Step 3: The pressure of the needle mold 2 is 80-150 MPa, and the pressure is maintained for not less than 5 minutes to obtain a semi-finished microporous nozzle blank;

[0042] Step 4: The mold cavity 3 is moved downward until the upper surface of the mold cavity 3 is flush with the upper surface of the micro-pore nozzle blank semi-finished product;

[0043] Step 5, the upper mold 1 moves upward to the needle mold 2 to separate from the micro-hole nozzle blank semi-finished product;

[0044] Step 6, moving the mold cavity 3 upward or downward until the mold cavity 3 is separated from the microporous nozzle blank semi-finished product, and then sintering the microporous nozzle blank semi-finished product;

[0045] Step seven, obtaining a micro-pore nozzle blank 6.

[0046] In order to ensure and realize the functions of the micro-hole nozzle blank 6 processed by this method, such as high hardness, good heat resistance and strong corrosion resistance, the powder 5 is a cemented carbide powder.

[0047] Specifically, in step three, the micropore diameter of the micropore nozzle blank semi-finished product is at least 0.05 mm.

[0048] It should be understood that in step four, in order to ensure the stability of the microporous nozzle blank semi-finished product and the integrity of the mold, and to avoid the generation of negative pressure in the blank molding cavity during the process of the upper mold 1 directly moving up to the needle mold 2 to separate from the microporous nozzle blank semi-finished product, which may cause the microporous nozzle blank semi-finished product to be destroyed, the mold cavity 3 described in step four is moved down until the upper surface of the mold cavity 3 is flush with the upper surface of the microporous nozzle blank semi-finished product.

[0049] The present invention also provides another micro-hole nozzle processing method, which uses the above-mentioned micro-hole nozzle to process the mold, comprising the following steps:

[0050] Step 1: The lower die 4 is inserted into the lower part of the blank through hole 31, and a feeding groove is formed between the top surface of the lower die 4 and the blank through hole 31;

[0051] Step 2: Add the powder 5 into the feeding trough in step 1, move the upper mold 1 downward, insert the needle mold 2 into the upper part of the blank through hole 31, and the needle mold 2 presses the powder 5 in the feeding trough, and a blank forming cavity is formed between the lower mold 4, the blank through hole 31 and the needle mold 2;

[0052] Step 3: The pressure of the needle mold 2 is 80-150 MPa, and the pressure is maintained for not less than 5 minutes to obtain a semi-finished microporous nozzle blank;

[0053] Step 4: The mold cavity 3 is moved downward until the upper surface of the mold cavity 3 is flush with the upper surface of the micro-pore nozzle blank semi-finished product;

[0054] Step 5, the upper mold 1 moves upward to the needle mold 2 to separate from the micro-hole nozzle blank semi-finished product;

[0055] Step 6, moving the mold cavity 3 upward or downward until the mold cavity 3 is separated from the microporous nozzle blank semi-finished product, and then sintering the microporous nozzle blank semi-finished product;

[0056] Step 7: Grinding and polishing the semi-finished micro-pore nozzle blank;

[0057] Step eight, obtaining the micro-pore nozzle blank 6.

[0058] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A micro-hole nozzle processing mold, characterized in that: The utility model comprises a lower die, an upper die which can be raised and lowered relative to the lower die, and a die cavity which can be raised and lowered relative to the lower die, wherein the die cavity is located between the upper die and the lower die, a needle die is installed at the lower end of the upper die, the bottom of the needle die is in an inverted cone shape, a needle tool is provided at the cone angle of the needle die, a blank through hole is provided in the die cavity at a position opposite to the needle die, a blank molding cavity can be formed between the lower die, the blank through hole and the needle die, powder can be placed in the blank molding cavity, the taper angle of the bottom of the needle die is greater than 80 degrees, an avoidance groove is provided on the upper surface of the lower die, the avoidance groove is located directly below the needle tool, and the upper die and the die cavity can be away from or close to each other.

2. A micro-hole nozzle processing method, characterized in that: The method adopts the micro-hole nozzle processing mold according to claim 1, and comprises the following steps: Step 1: The lower die is inserted into the lower part of the through hole of the blank, and a feeding groove is formed between the top surface of the lower die and the through hole of the blank; Step 2: Add the powder into the feeding trough in step 1, move the upper die downward, insert the needle die into the upper part of the through hole of the blank, and the needle die presses the powder in the feeding trough, so that a blank forming cavity is formed between the lower die, the through hole of the blank and the needle die; Step 3: The pressure of the needle mold is 80-150 MPa, and the pressure is maintained for not less than 5 minutes to obtain a semi-finished microporous nozzle blank; Step 4: The mold cavity is moved downward until the upper surface of the mold cavity is flush with the upper surface of the semi-finished micro-hole nozzle blank; Step 5: The upper mold moves upward to the needle mold to separate the micro-hole nozzle blank semi-finished product; Step 6, moving the mold cavity upward or downward until the mold cavity is separated from the microporous nozzle blank semi-finished product, and then sintering the microporous nozzle blank semi-finished product; Step seven, obtaining a micro-hole nozzle blank.

3. A micro-hole nozzle processing method according to claim 2, characterized in that: The following step is also included between step six and step seven: grinding and polishing the semi-finished micro-pore nozzle blank.

4. A micro-hole nozzle processing method according to claim 2, characterized in that: In step three, the micropore diameter of the micropore nozzle blank semi-finished product is at least 0.05 mm.

5. A micro-hole nozzle processing method according to claim 2, characterized in that: The powder material is cemented carbide powder.

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