High-precision edge-reserved spray head coating mold for metallized film

Abstract

The utility model provides a high-precision margin nozzle coating mould for a metallized film, which comprises a mould body, a groove is arranged on the mould body, the bottom end face of the groove is arranged in an inclined manner relative to the horizontal plane, coating through holes are arranged on the bottom end face of the groove, the coating through holes are of a frustum-shaped structure, and the bottom end face of the groove is provided with a groove. According to the utility model, the prismatic table-shaped hole with the narrow upper part and the wide lower part is adopted by the die, so that more oil-gas molecules are changed from irregular evaporation operation into linear motion, and the motion efficiency of the oil-gas molecules is improved, thereby improving the coating effect; the prismatic table surface is polished to be smooth until the Ra is 0.8 mu m, so that the friction of oil gas molecules on the hole surface of the mold is reduced, the oil outlet quantity is increased, the precision of the reserved edge is controlled, the width of a fuzzy boundary of an edge area of the reserved edge is reduced, and the reserved edge is clearer; due to the change of the hole surface structure of the mold, the final integral spraying angle of oil gas molecules is closer to the vertical angle after the oil gas molecules are guided by the slope, the funnel-shaped structure is beneficial to formation of oil gas pressure, and the efficiency and quality of the evaporation process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallized film preparation, in particular to a high-precision edge-retaining nozzle coating die for metallized film. Background Art

[0002] Metallized film capacitors are an important electronic component, widely used in various electronic devices. In its preparation process, the production of margins is a key link. The traditional method of making margins is mainly to spray through a nozzle coating mold. The shape and structure of the mold have an important influence on the coating effect. In addition, during the evaporation process of the metallized film capacitor margin, the movement state and distribution of oil and gas molecules will also affect the quality of the margin. The existing solution is mainly to use conventional rectangular holes for spraying to make the margins of metallized film capacitors. Although this method is simple and easy, due to the structure of the mold hole surface, the final overall injection angle of the oil and gas molecules after being guided by the slope may deviate from the vertical angle, resulting in poor coating effect and a large width of the blurred boundary of the edge area of ​​the margin.

[0003] In addition, the existing technology has the following main problems when making the edge of metallized film capacitors: First, due to the structure of the mold hole surface, the final overall injection angle of the oil and gas molecules may deviate from the vertical angle after being guided by the slope, resulting in poor coating effect and a large width of the blurred boundary of the edge area. Secondly, the roughness of the mold hole surface may also affect the movement state and distribution of the oil and gas molecules, thereby affecting the quality of the edge. Finally, the existing mold structure may not be able to effectively control the pressure and flow of the oil and gas, resulting in unstable coating effect and difficulty in ensuring the accuracy of the edge. Utility Model Content

[0004] The utility model aims to provide a high-precision edge-leaving nozzle coating mold for metallized films, aiming to solve the problems that the existing mold structure may not be able to effectively control the pressure and flow of oil and gas, resulting in unstable coating effect, difficult to ensure the accuracy of the edge, oil and gas molecules deviate from the vertical angle when guided by the slope, poor coating effect, and a large width of the blurred boundary of the edge area of ​​the edge.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-precision edge-retaining nozzle coating mold for metallized films is provided, comprising a mold body, a groove is provided in the middle of one end surface of the mold body, the bottom end surface of the groove is inclined relative to the horizontal plane, and a plurality of groups of coating through holes are arranged on the bottom end surface of the groove, and the coating through holes are in a terrace-shaped structure.

[0007] Preferably, the bottom end of the groove is arc-shaped and faces toward the coating through-hole concave structure.

[0008] Preferably, the bottom end of the groove is sloped and inclined toward the coating through hole.

[0009] Preferably, a convex portion is extended from one end surface of the mold body opposite to the groove, and the convex portion is arranged along the length direction of the mold body.

[0010] Preferably, two sides of the protrusion are arranged obliquely along two sides of the mold body.

[0011] Preferably, the convex portion is arc-shaped and arranged toward two sides of the mold body.

[0012] Preferably, the coating through hole decreases from large to small along the depth direction of the groove.

[0013] Preferably, the inner wall of the coated through hole is polished and smooth to Ra of 0.6 to 0.8 μm.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Optimize the mold structure: By changing the original square hole structure of the mold into a prism-shaped hole that is narrow at the top and wide at the bottom, more oil and gas molecules are transformed from irregular evaporation to linear motion, which improves the movement efficiency of the oil and gas molecules and thus improves the coating effect.

[0016] 2. Improve coating effect: By grinding the prism surface to a Ra of 0.6 to 0.8μm, the friction of oil and gas molecules on the mold hole surface can be reduced, the oil output and the accuracy of controlling the margin can be increased, and the width of the blurred boundary of the margin area can be reduced, forming a clearer margin. 3. Improve the evaporation process: Due to the change in the mold hole surface structure, the final overall injection angle of the oil and gas molecules after being guided by the slope is closer to the vertical angle. The funnel-shaped structure is conducive to the formation of oil and gas pressure, and the smooth slope reduces the residue of oil and gas molecules, thereby improving the efficiency and quality of the evaporation process. 4. Improve product quality: Improve the production efficiency of the margin of metallized film capacitors, and improve the quality of the margins, thereby improving the overall performance and service life of metallized film capacitors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is a top view of the utility model;

[0020] Figure 3 for Figure 2 AA section view;

[0021] Figure 4 for Figure 2 BB cross-sectional view;

[0022] In the figure: 1. mold body; 2. groove; 3. coating through hole; 4. convex part. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0026] Combine the following Figures 1 to 4 The utility model describes a high-precision edge-retaining nozzle coating die for metallized films.

[0027] like Figures 1 to 4 As shown, the utility model provides a high-precision edge-leaving nozzle coating mold for metallized film, including a mold body 1, a groove 2 is opened in the middle of one end surface of the mold body 1, the bottom end surface of the groove 2 is inclined relative to the horizontal plane, and a plurality of groups of coating through holes 3 are arranged on the bottom end surface of the groove 2, and the coating through holes 3 are in a terrace-shaped structure.

[0028] Preferably, the bottom end of the groove 2 is in an arc shape and is concave toward the coating through hole 3 .

[0029] Preferably, a convex portion 4 is extended from one end surface of the mold body 1 opposite to the groove 2 , and the convex portion 4 is arranged along the length direction of the mold body 1 .

[0030] Preferably, the protrusions 4 are arc-shaped and arranged toward both sides of the mold body 1 .

[0031] Preferably, the coating through hole 3 decreases from large to small along the depth direction of the groove 2 .

[0032] Preferably, the inner wall of the coated through hole 3 is polished and smoothed to Ra of 0.8 μm.

[0033] Production method:

[0034] S1: Select a rectangular mold material: 6063 aluminum alloy, the size of which should be designed according to actual needs. In this embodiment, the mold material we selected is 800mm in length, 80mm in width, and 8mm in height;

[0035] S2: Use precision machining equipment and CNC machine tools to change the internal structure of the mold into a prism-shaped hole. In this embodiment, we change the internal structure of the mold into a prism-shaped hole with an upper bottom length of 4mm, a lower bottom length of 7mm, and a height of 3mm;

[0036] S3: Use precision grinding equipment: electrolytic grinding machine to grind the table surface of the mold to make it smooth, so that its surface roughness reaches Ra = 0.8. In this embodiment, the voltage of the electrolytic grinding machine we used is 220V, the current is 10A, and the grinding time is 30 minutes;

[0037] S4: Install the mold on the equipment and set the evaporation process parameters, such as the spraying pressure is 18Pa and the spraying temperature is 170°C;

[0038] S5: Place the metallized film into the coating equipment for spraying. In this embodiment, the metallized film used has a thickness of 4.8 μm and a width of 620 mm;

[0039] S6: After spraying, take out the metallized film and check its edge quality. In this embodiment, the detection equipment we use is an optical microscope;

[0040] Through the above steps, we can obtain an improved metallized film capacitor edge-leaving nozzle coating mold, which can effectively improve the coating effect and edge-leaving accuracy, reduce the friction of oil and gas molecules on the mold hole surface, increase the oil output and control the edge-leaving accuracy, and form a clearer edge.

[0041] The beneficial effects are: 1. Optimize the mold structure: By changing the original square hole structure of the mold into a prism-shaped hole, the structure can accommodate more oil and gas, and at the same time form a certain pressure difference, so that more oil and gas molecules are transformed from irregular evaporation to linear motion, which improves the movement efficiency of oil and gas molecules, thereby improving the coating effect and the accuracy of the edge. 2. Improve the coating effect: By grinding the prism surface to Ra = 0.8, the friction of oil and gas molecules on the mold hole surface is reduced, the oil output and the accuracy of the edge are increased, the width of the fuzzy boundary of the edge area is reduced, and a clearer edge is formed. The smooth slope surface can also reduce the residue of oil and gas molecules and improve the coating effect. 3. Improve the evaporation process: Due to the change in the mold hole surface structure, the final overall injection angle of the oil and gas molecules after being guided by the slope is closer to the vertical angle. The funnel-shaped structure is conducive to the formation of oil and gas pressure, and the smooth slope surface reduces the residue of oil and gas molecules, thereby improving the efficiency and quality of the evaporation process. 4. Improve product quality: Improve the production efficiency of the edge of the metallized film capacitor, and improve the quality of the edge, thereby improving the overall performance and service life of the metallized film capacitor.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-precision edge-retaining nozzle coating die for metallized films, characterized in that: The mold body comprises a mold body, wherein a groove is provided in the middle of one end surface of the mold body, the bottom end surface of the groove is inclined relative to the horizontal plane, and a plurality of groups of coating through holes are arranged on the bottom end surface of the groove, and the coating through holes are in a terraced structure.

2. The high-precision edge-retaining nozzle coating mold for metallized film according to claim 1, characterized in that: The bottom end of the groove is in an arc shape and faces toward the coating through hole concave structure.

3. The high-precision edge-retaining nozzle coating mold for metallized film according to claim 1, characterized in that: The bottom end of the groove is sloped and inclined toward the coating through hole.

4. The high-precision edge-retaining nozzle coating mold for metallized film according to claim 1, characterized in that: A convex portion is extended from one end surface of the mold body opposite to the groove, and the convex portion is arranged along the length direction of the mold body.

5. The high-precision edge-retaining nozzle coating mold for metallized film according to claim 4, characterized in that: The two sides of the convex portion are arranged obliquely along the two sides of the mold body.

6. The high-precision edge-retaining nozzle coating mold for metallized film according to claim 4, characterized in that: The convex part is arranged in an arc shape toward two sides of the mold body.

7. The high-precision edge-retaining nozzle coating mold for metallized film according to claim 1, characterized in that: The coating through hole decreases from large to small along the depth direction of the groove.

8. The high-precision edge-retaining nozzle coating mold for metallized film according to claim 1 or 7, characterized in that: The inner wall of the coated through hole is polished and smoothed to Ra of 0.6 to 0.8 μm.

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