Built-in ultrathin-wall insulation cap mold for switch of ignition device

Abstract

The invention discloses an explosion device switch built-in ultrathin wall insulation cap mold, and particularly relates to the technical field of molds, the explosion device switch built-in ultrathin wall insulation cap mold comprises a base, the upper end of the base is provided with a fixed mold, the upper end of the fixed mold is provided with a hydraulic device, the output end of the hydraulic device is fixedly connected with a movable mold, and the movable mold comprises a movable seat; an injection molding machine is mounted at the upper end of the movable seat, four injection devices are mounted at the lower end of the injection molding machine, and two hot runners are fixedly connected to the lower ends of the four injection devices. Through a precise guide structure, the precision during mold closing can be guaranteed, the problem of flash or uneven wall thickness caused by dislocation of a thin-wall part is prevented, meanwhile, the wear resistance of the guide column is improved, a sealing structure of a parting surface is matched with a high-temperature-resistant sealing strip, the sealing performance can be guaranteed, a negative pressure device operates normally during injection molding, a vacuumizing mechanism supports high-injection-speed injection molding, and the production efficiency is improved. And the gradient heat conduction insert can achieve local rapid cooling, the forming period is shortened, and warping is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold, in particular to a point explosion device switch built-in ultra-thin wall insulating cap mold. BACKGROUND

[0002] At present, the demand for lightweight components in the automobile, electronics and other industries is growing rapidly, and the thin-walled injection molding technology has become the focus of the industry. The thickness of mainstream thin-walled parts has made some breakthroughs, but there are still technical obstacles in the field of ultra-thin wall injection molding. At the same time, the requirements for product surface finish in the field of consumer electronics and high-end automobile parts continue to improve, and the temperature control accuracy and cooling efficiency of existing molds are difficult to meet the high light effect required by ultra-thin wall parts.

[0003] In the process of ultra-thin wall injection molding, there are difficulties in melt flow balance control. The flow resistance of the melt in the mold cavity will increase significantly, which requires the development of a glue feeding system to achieve high-speed and balanced flow and avoid defects such as short shots or weld lines. In addition, the traditional ejector pin mechanism is prone to cause product deformation in the case of ultra-thin wall, so the design of the ejection system also needs to be optimized, so as to ensure the molding quality of ultra-thin wall products. SUMMARY

[0004] The main purpose of the present application is to provide a point explosion device switch built-in ultra-thin wall insulating cap mold, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A point explosion device switch built-in ultra-thin wall insulating cap mold, comprising a base, a fixed mold is installed at the upper end of the base, a hydraulic device is installed at the upper end of the fixed mold, an output end of the hydraulic device is fixedly connected with a movable mold, the movable mold comprises a movable seat, an injection molding machine is installed at the upper end of the movable seat, four injection devices are installed at the lower end of the injection molding machine, two hot runners are fixedly connected at the lower end of each of the four injection devices, side runners are fixedly connected at both ends of each of the two hot runners, and a mold cavity is fixedly connected at one end of the two side runners on the same side. Gradient heat conduction inserts corresponding to the eight mold cavities are installed in the fixed mold, and a plurality of air inlet pipes are arranged in the fixed mold, and the air inlet pipes are in communication with the air holes at the corresponding positions.

[0006] Preferably, the gradient heat conduction insert comprises an air hole, a cooling component and a heat conduction component, the heat conduction component is a 3D printed grafted high-thermal-conductivity metal material, a through groove one is formed at the upper end of the base and at the corresponding position of the gradient heat conduction insert, a spring and an ejection component are arranged in the through groove one, the ejection component on the same side is in sliding connection with the inner surface of the gradient heat conduction insert, a through groove two is formed at the lower end of the gradient heat conduction insert, and the through groove two is in communication with the through groove one at the adaptive position.

[0007] Preferably, the lower end of the movable seat is also provided with eight upper mold cavities corresponding to the eight gradient heat conduction inserts respectively, the outer surface of the upper mold is provided with a sealing ring one, the connection between the movable seat and the movable mold is provided with a sealing ring two, the connection between the movable mold and the fixed mold is provided with a sealing ring three, the outer surface of the gradient heat conduction insert inside the fixed mold is provided with a sealing ring four, and the top end of the through groove two is provided with a sealing ring five.

[0008] Preferably, one side of the upper mold cavity is provided with a pressure sensor, and the lower end of the four injection devices is provided with an insert needle.

[0009] Preferably, one side of the movable seat is provided with a connector, and the connector is electrically connected with the injection molding machine.

[0010] Preferably, the upper end of the movable mold is provided with a negative pressure air suction pump, the output end of the negative pressure air suction pump is fixedly connected with an air suction pipe, one end of the air suction pipe away from the negative pressure air suction pump is connected with the mold cavity respectively, one side of the negative pressure air suction pump is provided with a negative pressure value setting monitoring table, and the negative pressure air suction pump and the negative pressure value setting monitoring table are electrically connected.

[0011] Preferably, the surface of the mold cavity is sprayed with a diamond-like carbon film DLC coating with a thickness of 5 microns, and the diamond-like carbon film DLC coating is prepared by a PVD process, and the microhardness reaches 3000HV.

[0012] Compared with the prior art, the present application has the following beneficial effects: 1. The present application can guarantee the accuracy of the mold closing through the precise guide structure, prevent the thin-walled part from producing burrs or uneven wall thickness due to misalignment, improve the wear resistance of the guide pillar, and guarantee the sealing property through the sealing structure of the parting surface matched with the high-temperature-resistant sealing strip, so that the negative pressure device can normally operate during injection molding, the vacuum suction mechanism can support high-speed injection molding, the product can be guaranteed to be stable and complete, the gradient heat conduction insert can realize local rapid cooling, the molding cycle can be shortened, and warping can be prevented.

[0013] 2. The present application can avoid the deformation of the thin-walled part during ejection through the ejection system driven by a servo motor and cooperating with the gas ejection mode, the nano coating of the mold cavity can significantly reduce the demolding resistance, the multi-stage runner design, the nano coating inner wall of the runner, and the dynamic pressure monitoring feedback can make the melt filling pressure more balanced, improve the flowability of high-viscosity materials in the ultra-thin section, solve the problem of uneven melt filling, and guarantee the molding quality of the thin-walled part. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of part of the structure of the present application Figure One ; Figure 3The structural schematic diagram of the injection molding machine of the present application; Figure 4 The layout structural diagram of the hot runner and the lateral runner of the present application; Figure 5 The layout structural diagram of the air inlet pipe of the present application; Figure 6 The structural schematic diagram of the gradient heat conduction insert of the present application; Figure 7 The sectional structural schematic diagram of the gradient heat conduction insert of the present application; Figure 8 The structural schematic diagram of the ejection component of the present application; Figure 9 The structural schematic diagram of the partial structure of the present application Figure Two ; Figure 10 The connecting structural schematic diagram of the through groove one and the through groove two of the present application; Figure 11 The structural schematic diagram of the partial structure of the present application Figure Three ; Figure 12 The structural schematic diagram of the negative pressure air extraction pump of the present application.

[0015] In the figure: 1, base; 2, fixed mold; 3, movable mold; 31, movable seat; 4, hydraulic device; 5, injection molding machine; 6, hot runner; 7, lateral runner; 8, mold cavity; 9, gradient heat conduction insert; 91, air hole; 92, cooling component; 93, heat conduction component; 94, through groove one; 941, through groove two; 95, spring; 96, ejection component; 10, air inlet pipe; 11, sealing ring one; 12, sealing ring two; 13, sealing ring three; 14, sealing ring four; 15, sealing ring five; 16, insert needle; 17, pressure sensor; 18, joint; 19, negative pressure air extraction pump; 20, negative pressure value setting monitoring table; 21, air extraction pipe. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0017] Embodiment one, as Figures 1-12As shown, a point explosion device switch built-in ultra-thin wall insulation cap mold, including base 1, the upper end of base 1 is installed with fixed mold 2, the upper end of fixed mold 2 is installed with hydraulic device 4, hydraulic device 4 includes guide column and guide sleeve cooperation structure, ensure coaxiality error of fixed mold 2 and movable mold 3 during clamping process is less than 0.01mm, avoid the problem of flash or uneven wall thickness of thin-walled parts caused by misplacement, and the surface of guide column is treated with hard chrome, the hardness is more than HRC60, ensure the wear resistance of long-term use, at the same time, select high-precision precision positioning standard parts, cooperate with guide column and guide sleeve, further control the position error within 0.005mm, the output end of hydraulic device 4 is fixedly connected with movable mold 3, the movable mold 3 includes movable seat 31, the upper end of movable seat 31 is installed with injection molding machine 5, the lower end of injection molding machine 5 is installed with four injection devices, the lower end of four injection devices is fixedly connected with two hot runners 6, the two ends of two hot runners 6 are fixedly connected with lateral runners 7, one end of two lateral runners 7 on the same side is fixedly connected with mold cavity 8, adopt the collaborative layout of hot runner 6 and lateral runner 7, realize the synchronous injection of melt from both sides of the head end of forming cavity, ensure the balance of 0.2mm thin-walled area filling pressure, avoid local short shot or flash defects, and the inner wall of flow channel system is sprayed with low friction coefficient nanometer material, reduce the melt flow resistance, improve the fluidity of high viscosity material in ultra-thin section, make the wall thickness tolerance control within ±0.01mm, the inside of fixed mold 2 is installed with gradient heat conduction insert 9 corresponding to eight mold cavities 8 respectively, gradient heat conduction insert 9 adopts stepped sealing structure, cooperate with high temperature resistant silica gel sealing strip which can withstand 250 DEG C, sealing groove is milled by numerical control machining center, the surface roughness is controlled within Ra0.4μm, ensure the sealing property, ensure the normal operation of negative pressure device during injection molding, at the same time, embed copper tungsten alloy insert in the deformation area, the thermal conductivity is 2.5 times of that of mold steel, realize local rapid cooling, shorten the forming period by 15% and prevent warping, the inside of fixed mold 2 is provided with several air inlet pipes 10, air inlet pipes 10 are communicated with corresponding air holes 91 respectively.

[0018] The fixed mold 2 is pushed upward under the drive of the hydraulic device 4, and the internal gas enters the air hole 91 from the air inlet pipe 10 at the same time, breaking the vacuum state formed inside the formed part, so as to eject it.

[0019] The gradient heat conduction insert 9 comprises air holes 91, cooling components 92 and heat conduction components 93. The cooling components 92 are used for waterway cooling of the gradient heat conduction insert 9, and internal gas cooling meets the short cycle injection molding production. The heat conduction components 93 are 3D printed grafted high heat conduction metal materials. The upper end of the base 1 and the corresponding position of the gradient heat conduction insert 9 are both provided with a through groove one 94. The through groove one 94 is provided with a spring 95 and an ejection component 96. The same side ejection component 96 is in sliding connection with the inner surface of the gradient heat conduction insert 9. When the ejection component 96 ejects the formed part, the ejection stroke accuracy is 0.02mm, and stepless variable speed ejection of 0-50mm / s can be realized. At the same time, gas ejection is matched, the internal vacuum is broken, and the thin-walled part ejection deformation is avoided. The lower end of the gradient heat conduction insert 9 is provided with a through groove two 941, which is in communication with the through groove one 94 of the adaptive position.

[0020] The lower end of the movable seat 31 is also provided with eight upper die cavities corresponding to the eight gradient heat conduction inserts 9 respectively. The outer surface of the upper die is provided with a sealing ring one 11. The connection between the movable seat 31 and the movable die 3 is provided with a sealing ring two 12. The connection between the movable die 3 and the fixed die 2 is provided with a sealing ring three 13. The outer surface of the gradient heat conduction insert 9 located in the inside of the fixed die 2 is provided with a sealing ring four 14. The top end of the through groove two 941 is installed with a sealing ring five 15.

[0021] A pressure sensor 17 is installed on one side of the upper die cavity, which can adjust the injection speed and holding pressure curve in real time, solve the filling uneven problem caused by melt front cooling, and monitor the injection pressure at any time. The injection molding machine 5 is linked, an alarm is given when an abnormality occurs, the injection molding process is monitored, stable production and product quality are ensured, and the lower end of the four injection devices is installed with a pin 16.

[0022] A connector 18 is installed on one side of the movable seat 31, which is electrically connected with the injection molding machine 5.

[0023] A negative pressure air pump 19 is installed on the upper end of the movable die 3. When the negative pressure air pump 19 is started, the injection molding is started only after the specified negative pressure value is reached, so as to ensure the stability and integrity of the high-speed product. The output end of the negative pressure air pump 19 is fixedly connected with an air suction pipe 21. The end of the air suction pipe 21 away from the negative pressure air pump 19 is connected with the mold cavity 8 respectively. A negative pressure value setting and monitoring table 20 is installed on one side of the negative pressure air pump 19. The negative pressure air pump 19 and the negative pressure value setting and monitoring table 20 are electrically connected, so as to realize linkage with the injection molding machine 5. The mold cavity 8 starts the glue injection action only after the set negative pressure value is reached.

[0024] The surface of the mold cavity 8 is sprayed with diamond-like carbon film DLC coating with a thickness of 5μm, which is prepared by PVD process, and the microhardness reaches HV3000.

[0025] After the fixed mold 2 and the movable mold 3 are closed, the negative pressure air pump 19 is started to perform the action of vacuumizing, and after the negative pressure value reaches the set value, the injection molding machine 5 starts to inject glue, the pressure sensor 17 monitors the injection pressure, and after the injection is completed and cooled, the hydraulic device 4 is started to drive the fixed mold 2 and the movable mold 3 to separate, so that the negative pressure air pump 19 is pushed upward, and at the same time, gas enters the air hole 91 from the air inlet pipe 10, breaks the vacuum state formed in the inside of the formed part, and thereby pushes it out.

[0026] It should be particularly pointed out that the specific installation mode and circuit connection mode and control method of the hydraulic device 4, the injection molding machine 5, the pressure sensor 17, the negative pressure air pump 19 and the negative pressure value setting monitoring table 20 used in the present application all belong to the conventional design, and the present application will not be described in detail.

[0027] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A mold for an ultra-thin-walled insulating cap built into a detonation device switch, comprising a base (1), a fixed mold (2) mounted on the upper end of the base (1), a hydraulic device (4) mounted on the upper end of the fixed mold (2), a moving mold (3) fixedly connected to the output end of the hydraulic device (4), the moving mold (3) comprising a movable seat (31), an injection molding machine (5) mounted on the upper end of the movable seat (31), characterized in that: The lower end of the injection molding machine (5) is equipped with four injection devices. The lower ends of the four injection devices are fixedly connected to two hot runners (6). The two ends of the two hot runners (6) are fixedly connected to side runners (7). One end of the two side runners (7) on the same side is fixedly connected to a mold cavity (8). The interior of the fixed mold (2) is equipped with gradient heat-conducting inserts (9) corresponding to the eight mold cavities (8). The interior of the fixed mold (2) is provided with several air inlet pipes (10). The air inlet pipes (10) are connected to the air holes (91) at the corresponding positions.

2. The mold for an ultra-thin-walled insulating cap built into a detonation device switch according to claim 1, characterized in that: The gradient heat-conducting insert (9) includes an air hole (91), a cooling component (92), and a heat-conducting component (93). The heat-conducting component (93) is a 3D-printed high thermal conductivity metal material. The upper end of the base (1) and the corresponding position of the gradient heat-conducting insert (9) are provided with a through groove (94). The inside of the through groove (94) is provided with a spring (95) and an ejector component (96). The ejector component (96) on the same side is slidably connected to the inner surface of the gradient heat-conducting insert (9). The lower end of the gradient heat-conducting insert (9) is provided with a through groove (941). The through groove (941) is connected to the through groove (94) at the matching position.

3. A mold for an ultra-thin-walled insulating cap built into a detonation device switch according to claim 2, characterized in that: The lower end of the movable seat (31) is also provided with an upper mold cavity corresponding to the eight gradient heat-conducting inserts (9). A sealing ring one (11) is provided on the outer surface of the upper mold. A sealing ring two (12) is provided at the connection between the movable seat (31) and the moving mold (3). A sealing ring three (13) is provided at the connection between the moving mold (3) and the fixed mold (2). A sealing ring four (14) is provided on the outer surface of the gradient heat-conducting insert (9) and inside the fixed mold (2). A sealing ring five (15) is installed at the top of the through groove two (941).

4. A mold for an ultra-thin-walled insulating cap built into a detonation device switch according to claim 3, characterized in that: A pressure sensor (17) is installed on one side of the upper mold cavity, and inserts (16) are installed at the lower ends of the four injection devices.

5. A mold for an ultra-thin-walled insulating cap built into a detonation device switch according to claim 1, characterized in that: A connector (18) is installed on one side of the movable seat (31), and the connector (18) is electrically connected to the injection molding machine (5).

6. A mold for an ultra-thin-walled insulating cap built into a detonation device switch according to claim 1, characterized in that: A negative pressure vacuum pump (19) is installed at the upper end of the moving mold (3). The output end of the negative pressure vacuum pump (19) is fixedly connected to a vacuum pipe (21). The end of the vacuum pipe (21) away from the negative pressure vacuum pump (19) is connected to the mold cavity (8). A negative pressure value setting monitoring meter (20) is installed on one side of the negative pressure vacuum pump (19). The negative pressure vacuum pump (19) is electrically connected to the negative pressure value setting monitoring meter (20).

7. A mold for an ultra-thin-walled insulating cap built into a detonation device switch according to claim 1, characterized in that: The surface of the mold cavity (8) is coated with a diamond-like carbon (DLC) film with a thickness of 5 μm, and is prepared by PVD process, with a microhardness of HV3000.

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