A special mold for integrated molding without burrs
By using a dedicated mold for burr-free molding, the problem of burrs on irregularly shaped mica parts has been solved, enabling efficient production and low-cost manufacturing, and enhancing product competitiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 浙江荣泰电工器材股份有限公司
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-26
AI Technical Summary
When using existing compression molding dies to produce irregularly shaped mica parts, the edges of the mold cavity cannot be effectively filled, resulting in burrs that require secondary trimming, which reduces production efficiency.
The mold is an integrated molding die with no burrs, including a female mold and a male mold. The mold is closed by a sealing component to form an irregular mold cavity. It is equipped with an injection port, a liquid level adjustment port and a liquid level adjustment pipe to precisely control the injection volume of mica slurry and the removal of volatile organic solvents, ensuring uniform filling and curing of the slurry.
This technology enables the production of irregularly shaped mica parts without burrs, improving production efficiency, reducing trimming waste, lowering production costs, and ensuring consistent product quality.
Smart Images
Figure CN224275516U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mold technology for irregular mica parts, and in particular to a special mold for integrated molding without burrs. Background Technology
[0002] Irregularly shaped mica parts have excellent flame-retardant and mechanical properties, which can meet the thermal runaway protection requirements of new energy vehicles, enabling them to be widely used in the field of new energy vehicle components, replacing conventional metal parts.
[0003] Currently, there are two methods for producing irregularly shaped mica parts. The first method uses hot-pressing and die-cutting of mica paper to produce irregularly shaped mica parts, but this method is only suitable for automotive parts with simple three-dimensional structures. For complex automotive parts with curved surfaces, the second method, mica casting and hot-pressing, is used.
[0004] The existing mica casting and hot pressing method for producing irregularly shaped mica parts involves the following steps: First, a mica slurry is prepared. Then, the organic solvent in the mica slurry is heated and evaporated to obtain a dry-weight mica slurry. This dry-weight mica slurry is then extruded into the irregularly shaped cavity of a molding die. Finally, it is hot-pressed and cured to obtain the irregularly shaped mica part. However, the irregularly shaped mica parts produced by this method suffer from burrs because the dry-weight mica slurry has poor fluidity and cannot effectively fill the edges of the irregularly shaped cavity. In actual design, the irregularly shaped cavity of the molding die is often larger, requiring the prepared irregularly shaped mica parts to be machined, trimmed, and edge-trimmed to obtain the finished product with the desired size and structure.
[0005] In summary, the irregular mica parts prepared by existing molding dies have burrs on their edges, requiring secondary cutting and trimming, which results in low production efficiency for irregular mica parts. Utility Model Content
[0006] To address the issue that existing molding dies cannot effectively fill the edge areas of the mold cavity after the mica slurry is punched into the die, resulting in burrs on the edges of irregularly shaped mica parts after hot pressing and curing, which necessitates secondary cutting and leads to low production efficiency, this invention provides an integrated molding die for burr-free molding.
[0007] The integrated molding die for burr-free molding provided by this utility model is achieved through the following technical solution:
[0008] An integrated molding die for burr-free molding includes a female mold and a male mold, which are joined together by a sealing element to form a shaped mold cavity. The male mold has several injection ports that are connected to the shaped mold cavity. Several injection pipes are fixedly and sealed to the male mold, and these pipes are connected to the injection ports. Several liquid level regulating ports are also provided through the male mold, connecting to the edge of the shaped mold cavity. These liquid level regulating pipes are fixedly and sealed to the male mold, and they are connected to the liquid level regulating ports.
[0009] The irregular mica parts prepared by the above-mentioned integrated molding burr-free forming special mold have a low burr rate and do not require secondary cutting and trimming, which improves the production efficiency of irregular mica parts and reduces the generation of trimming waste, thereby reducing the production cost of irregular mica parts and enhancing their core competitiveness.
[0010] Preferably, the injection pipe injects mica slurry into the irregular mold cavity; the injection pipe is equipped with a control valve A, which is used to control the volume of mica slurry injected into the irregular mold cavity.
[0011] Preferably, the control valve A is a solenoid valve.
[0012] By adopting the above technical solution, it is easy to accurately control the amount of mica slurry cast, thereby ensuring the quality of the produced irregular mica parts and the quality stability of the same batch.
[0013] Preferably, the injection port is uniformly arranged around the center point of the irregular mold cavity; the ratio of the straight-line distance from the injection port to the center point of the irregular mold cavity to the straight-line distance from the injection port to the edge of the irregular mold cavity is 100:(60-120).
[0014] Preferably, the straight-line distance from the injection port to the center point of the irregular mold cavity is equal to the straight-line distance from the injection port to the edge of the irregular mold cavity.
[0015] By adopting the above technical solution, it is easy to uniformly fill the interior of the irregular mold cavity with mica slurry, thereby ensuring the quality of the edges of the produced irregular mica parts and effectively reducing the burr problem of the prepared irregular mica parts.
[0016] Preferably, the liquid level regulating pipe includes a transparent tempered glass tube, one end of which is fixedly and sealed to the liquid level regulating port of the male mold, and the other end of which is fixedly and sealed to a first connecting steel pipe; the first connecting steel pipe is connected to a pressure gauge; the other end of the first connecting steel pipe opposite to the transparent tempered glass tube is fixedly and sealed to a second connecting steel pipe; the other end of the second connecting steel pipe opposite to the first connecting steel pipe is fixedly and sealed to a compressed gas adapter pipe; and a vacuum pipe is fixedly and sealed to the periphery of the second connecting steel pipe.
[0017] By adopting the above technical solution, the required mica slurry casting volume can be precisely controlled by observing the liquid level of the mica slurry in the transparent tempered glass tube, ensuring the quality of the produced irregularly shaped mica parts and the quality stability of the same batch. It should be noted that the fluidity of the mica slurry is adjusted by the organic solvent content; good fluidity facilitates rapid and uniform die-casting of the mica slurry, improving the production efficiency of irregularly shaped mica parts.
[0018] However, due to the presence of organic solvents in the mica slurry, during the hot pressing process, the organic solvents in the mica slurry in the irregular mold cavity evaporate. Therefore, the dry weight of the mica slurry after hot pressing and curing, which actually fills the irregular mold cavity, needs to be reduced by the organic solvent portion. In this invention, the mica slurry contained in the liquid level regulating pipe compensates for this loss due to organic solvent evaporation, facilitating the filling of the irregular mold cavity with dry weight-mica slurry, achieving integrated production of irregular mica parts, and reducing the burr problem of irregular mica parts.
[0019] Preferably, the organic solvent content in the mica slurry is X%; the number of liquid level regulating pipes is n; and the volume of the irregular mold cavity in the integrated molding die is V. 模腔 The casting volume V of the mica slurry. 浇 =V 模腔 / [(100-X) / 100], the mica slurry content in a single liquid level regulating fitting is V 管 = (V 浇 -V 模腔 ) / n.
[0020] Preferably, the area of the lower opening of the liquid level regulating port is smaller than the area of the upper opening of the liquid level regulating port; the lower opening of the liquid level regulating port and the upper opening of the liquid level regulating port are similar rectangles.
[0021] Preferably, the transparent tempered glass tube is etched with a graduated scale.
[0022] By adopting the above technical solution, it is convenient to observe the liquid level of the dry mica slurry after the organic solvent evaporates. The liquid level of the dry mica slurry needs to be flush with the lower end face of the liquid level adjustment port, thereby reducing the burr problem of irregular mica parts and ensuring the quality of irregular mica parts.
[0023] Preferably, a control valve B is provided on the vacuum tube.
[0024] Preferably, the control valve B is a solenoid valve.
[0025] By adopting the above technical solution, volatile organic solvents can be quickly removed by vacuuming.
[0026] In summary, this application has the following advantages:
[0027] 1. The integrated molding die for burr-free forming in this application can reduce the burr rate of irregular mica parts, eliminate the need for secondary cutting and trimming, improve the production efficiency of irregular mica parts, and reduce the generation of trimming waste, thereby reducing the production cost of irregular mica parts and enhancing their core competitiveness.
[0028] 2. The method of using the integrated molding die for burr-free forming in this application is as follows: Mica slurry is poured into the molding die, heated to remove the organic solvent in the mica slurry, and pressurized to 0.3-2.0 MPa to obtain irregular mica parts by hot molding, which can effectively ensure the mechanical strength and impact resistance of irregular mica parts. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the overall structure of the integrated molding die for burr-free molding in this application.
[0030] Figure 2 This is a top view of the male mold in the integrated molding die for burr-free molding in this application.
[0031] Figure 3 This is a schematic diagram of the connection structure of the female mold, male mold, and sealing element in the integrated molding die for burr-free molding in this application.
[0032] In the diagram, 1. Female mold; 10. Rubber sealing ring A; 101. Groove A; 102. Groove B; 2. Male mold; 21. Injection port; 22. Liquid level adjustment square port; 3. Injection fitting; 30. Sealing element; 301. Sealing element body; 302. Rubber sealing ring B; 303. Insert A; 304. Insert B; 31. Control valve A; 4. Liquid level adjustment fitting; 41. Transparent tempered glass tube; 411. Scale; 42. First connecting steel pipe; 421. Pressure gauge; 43. Second connecting steel pipe; 44. Compressed gas adapter pipe; 45. Vacuum pipe; 451. Control valve B; 46. Compressed gas connector; 461. Control valve C. Detailed Implementation
[0033] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Example
[0034] Reference Figure 1 and Figure 2A special mold for integrated molding without burrs includes a female mold 1, a male mold 2, a sealing element 30, an injection pipe 3, and a liquid level regulating pipe 4. The female mold 1 and the male mold 2 are joined together by the sealing element 30 to form a shaped mold cavity. The male mold 2 has several injection ports 21 that communicate with the shaped mold cavity. The injection pipe 3 is fixed to and sealed to the injection ports 21 of the shaped mold cavity. The male mold 2 also has several liquid level regulating ports 22 that communicate with the edges of the shaped mold cavity. The liquid level regulating pipe 4 is fixed to and sealed to the liquid level regulating ports 22 of the shaped mold cavity.
[0035] Reference Figure 1 and Figure 3 The sealing element 30 includes four sealing element bodies 301, which are detachably and securely connected to the joint of the mold body formed by the mating of the female mold 1 and the male mold 2 via bolts. A rubber sealing ring A10 is placed between the female mold 1 and the male mold 2. A rubber sealing ring B302 is also placed between the sealing element body 301 and the mold body formed by the mating of the female mold 1 and the male mold 2. A groove A101 is formed on the periphery of the female mold 1. A groove B201 is formed on the periphery of the male mold 2. An insert A303 is integrally formed on the sealing element body 301, which fits into the groove A101, and an insert B304 is fitted into the groove B201. Rubber sealing sheets are placed in both the groove A101 and the groove B201, which can effectively ensure the airtightness of the integrated molding die without burrs.
[0036] Reference Figure 1 and Figure 2 The injection port 21 is uniformly arranged around the center point of the irregular mold cavity. The ratio of the straight-line distance from the injection port 21 to the center point of the irregular mold cavity to the straight-line distance from the injection port 21 to the edge of the irregular mold cavity is 100:(60-120). Preferably, the straight-line distance from the injection port 21 to the center point of the irregular mold cavity is equal to the straight-line distance from the injection port 21 to the edge of the irregular mold cavity.
[0037] Reference Figure 1 and Figure 2 The injection pipe 3 injects mica slurry into the irregular mold cavity. The injection pipe 3 is fixedly connected to a control valve A31, which is preferably a solenoid valve. The control valve A31 is used to control the volume of mica slurry injected into the irregular mold cavity.
[0038] Reference Figure 1 and Figure 2 The liquid level regulating pipe fitting 4 includes a transparent tempered glass tube 41, a first connecting steel pipe 42, a second connecting steel pipe 43, a compressed gas transfer pipe 44, and a vacuum pipe 45.
[0039] Reference Figure 1 and Figure 2The amount of mica cast in the integrated molding die for burr-free molding is related to the content of organic solvent in the mica slurry. Specifically, the content of organic solvent in the mica slurry is X%. The number of liquid level regulating pipes 4 is n. The volume of the irregular mold cavity in the integrated molding die for burr-free molding is V. 模腔 The casting volume V of the mica slurry. 浇 =V 模腔 / 【100-X / 100】。 The mica slurry content in a single liquid level regulating fitting 4 is V. 管 = (V 浇 -V 模腔 ) / n.
[0040] Reference Figure 1 and Figure 2 One end of the transparent tempered glass tube 41 is fixed and sealed to the liquid level regulating port 22 of the male mold 2, and the other end is fixed and sealed to the first connecting steel pipe 42. In order to facilitate observation and calibration of the amount of mica slurry, the transparent tempered glass tube 41 is etched with a scale 411.
[0041] Reference Figure 1 and Figure 2 The first connecting steel pipe 42 is connected to a pressure gauge 421, which is used to indicate the evaporation and removal process of organic solvents in the mica slurry. When the organic solvents in the mica slurry evaporate, the reading of the pressure gauge 421 is greater than the atmospheric pressure (101 kPa), and the vacuum pipe 45 is connected to a vacuum pump unit to extract the evaporated organic solvents. When the organic solvents in the mica slurry have completely evaporated, the reading of the pressure gauge 421 tends to stabilize.
[0042] Reference Figure 1 and Figure 2 The first connecting steel pipe 42, with its other end facing away from the transparent tempered glass pipe 41, is fixedly and sealed to the second connecting steel pipe 43. The second connecting steel pipe 43, with its other end facing away from the first connecting steel pipe 42, is fixedly and sealed to the compressed gas adapter pipe 44. A vacuum pipe 45 is fixedly and sealed to the periphery of the second connecting steel pipe 43. The vacuum pipe 45 is fixedly connected to a control valve B451, which is preferably a solenoid valve.
[0043] Reference Figure 1 and Figure 2 The end of the compressed gas transfer pipe 44 facing away from the second connecting steel pipe 43 is fixedly and sealed to a compressed gas connector 46. The compressed gas connector 46 is fixedly connected to a control valve C461, which is preferably a solenoid valve.
[0044] Reference Figure 1 and Figure 2In order to facilitate the observation and acquisition of the liquid level information of the dry weight mica slurry after the evaporation of organic solvent in the liquid level regulating pipe 4, the area of the lower opening of the liquid level regulating square port 22 is smaller than the area of the upper opening of the liquid level regulating square port 22, and the lower opening of the liquid level regulating square port 22 and the upper opening of the liquid level regulating square port 22 are similar rectangles.
[0045] Reference Figure 1 and Figure 2 The specific method for producing irregularly shaped mica parts using an integrated molding die for burr-free forming is as follows:
[0046] First, prepare the mica slurry and determine that the organic solvent content in the mica slurry is X%;
[0047] The number of liquid level regulating pipes 4 in the integrated molding die for burr-free molding is n;
[0048] The volume of the irregularly shaped mold cavity in the integrated molding die for burr-free molding is V. 模腔 ;
[0049] The casting volume V of mica slurry 浇 =V 模腔 / 【100-X / 100】;
[0050] The mica slurry content in a single liquid level regulating fitting 4 is V 管 =V 浇 -V 模腔 / n;
[0051] Then the prepared mica slurry V 浇 =V 模腔 / 【100-X / 100】, injected into the irregular mold cavity of the special mold through injection fitting 3, the mica slurry content in a single liquid level regulating fitting 4 is V 管 =V 浇 -V 模腔 / n, that is, after the mica slurry is cast, the liquid level height of the mica slurry in a single liquid level regulating pipe 4 is H = (V 浇 -V 模腔 / n) / πr 2 r is the radius of the liquid level regulating pipe 4, i.e., the observation scale 411. When the liquid level of the mica slurry in the liquid level regulating pipe 4 reaches the liquid level of the specified scale 411, the casting operation can be completed.
[0052] Next, the female mold 1 and male mold 2 are heated to 140-160℃. The organic solvent in the mica slurry evaporates. The control valve B451 on the vacuum tube 45 is turned on, and the control valve C461 of the compressed gas connector 46 is turned off. The evaporated organic solvent is extracted from the irregular mold cavity of the special mold through the vacuum tube 45. When all the organic solvent in the mica slurry has evaporated, the reading of the pressure gauge 421 tends to stabilize.
[0053] Finally, close the control valve B451 on the vacuum tube 45, and close the control valve C461 on the compressed gas connector 46. Use compressed air to pressurize the irregular mold cavity at a pressure of 0.3-2.0 MPa, and hot mold for 15-30 minutes to obtain the irregular mica part.
[0054] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A special mold for integrated molding and burr-free forming, characterized in that: The mold includes a female mold (1) and a male mold (2). The female mold (1) and the male mold (2) are closed together by a sealing element (30) to form a shaped mold cavity. The male mold (2) has several injection ports (21) that are connected to the shaped mold cavity. The male mold (2) is fixedly and sealed to several injection pipes (3) that are connected to the injection ports (21). The male mold (2) has several liquid level regulating ports (22) that are connected to the edge of the shaped mold cavity. The male mold (2) is fixedly and sealed to several liquid level regulating pipes (4) that are connected to the liquid level regulating ports (22).
2. The integrated molding die for burr-free molding as described in claim 1, characterized in that: The injection pipe (3) injects mica slurry into the irregular mold cavity; the injection pipe (3) is equipped with a control valve A (31), which is used to control the volume of mica slurry injected into the irregular mold cavity.
3. The integrated molding die for burr-free molding according to claim 2, characterized in that: The control valve A (31) is a solenoid valve.
4. The integrated molding die for burr-free molding as described in claim 1, characterized in that: The injection port (21) is uniformly surrounding the center point of the irregular mold cavity; the ratio of the straight distance from the injection port (21) to the center point of the irregular mold cavity to the straight distance from the injection port (21) to the edge of the irregular mold cavity is 100:(60-120).
5. The integrated molding die for burr-free molding as described in claim 4, characterized in that: The straight-line distance from the injection port (21) to the center point of the irregular mold cavity is equal to the straight-line distance from the injection port (21) to the edge of the irregular mold cavity.
6. The integrated molding die for burr-free molding according to claim 1, characterized in that: The liquid level regulating pipe (4) includes a transparent tempered glass tube (41), one end of which is fixed and sealed to the liquid level regulating port (22) of the male mold (2), and the other end of which is fixed and sealed to a first connecting steel pipe (42); the first connecting steel pipe (42) is connected to a pressure gauge (421); the other end of the first connecting steel pipe (42) facing away from the transparent tempered glass tube (41) is fixed and sealed to a second connecting steel pipe (43); the other end of the second connecting steel pipe (43) facing away from the first connecting steel pipe (42) is fixed and sealed to a compressed gas adapter pipe (44); and the second connecting steel pipe (43) is fixed and sealed to a vacuum pipe (45) around its periphery.
7. The integrated molding die for burr-free molding as described in claim 6, characterized in that: The area of the lower opening of the liquid level regulating port (22) is smaller than the area of the upper opening of the liquid level regulating port (22); the lower opening of the liquid level regulating port (22) and the upper opening of the liquid level regulating port (22) are similar rectangles.
8. The integrated molding die for burr-free molding as described in claim 6, characterized in that: The vacuum tube (45) is equipped with a control valve B (451), which is a solenoid valve.
9. The integrated molding die for burr-free molding as described in claim 6, characterized in that: The transparent tempered glass tube (41) is etched with a graduated scale (411).