Viscous liquid quantitative feeding device for epoxy molding compound production

Abstract

The utility model discloses a viscous liquid quantitative feeding device for epoxy molding compound production, which comprises a gear pump main case, a gear pump is mounted at one end of the gear pump main case, a top liquid inlet of the gear pump is connected with a sunken funnel through a connecting pipe, and a liquid level controller is mounted on the connecting pipe. A liquid outlet of the gear pump is connected with a gear pump discharging pipe, and a discharging valve is installed at one end of the gear pump discharging pipe. According to the device, the gear pump is used for controlling the flow speed, the hopper feeding liquid level controller is used for controlling the adding amount, the electromagnetic valve is used for controlling feeding cut-off, liquid is prevented from automatically dripping due to the gravity factor, and the device is suitable for material processing of multiple batches and small batches of different products in a laboratory; a manual dripping mode is converted into automatic dripping, so that the uniformity of the dripping speed of the material is ensured, and meanwhile, the capillary effect of an unpowered funnel flow valve is also avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a feeding device, concretely is a viscous liquid ration feeding device for epoxy plastic package material production. BACKGROUND

[0002] Epoxy molding compound is a kind of thermosetting electronic packaging material, the purpose of premixing is to mix powder and liquid material uniformly, so that the mixing index of subsequent process is stable.But the current technical scheme can only be preliminary mixed, cannot guarantee that the liquid coupling agent can be mixed uniformly in the powder, the reason is that the liquid material is mostly coupling agent and other liquid with high viscosity, in the adding process, the existing technology can only manually drop to add or increase the flow valve control to add in the funnel, the manual drop operation has the liquid flow rate too big or too small in the drop process, cannot be steady-state control, the flow valve control drops, due to the instability of coupling agent in air, there will be water absorption and other reasons, and the pipe wall will be crystallized and blocked, the liquid with high viscosity will also form capillary effect on the pipe wall, cannot drop in time, resulting in too slow flow rate and too long adding time in later period.Therefore, in the premixing process, the ability of uniform speed drop cannot be achieved.In the finished product test, cracks, chip surface delamination, 50 μm magnification silicon powder particles and shadow around are found, and raman test finds that it is silicon oil characteristic peak.

[0003] For the patent publication No. CN104385477B, a kind of viscous liquid automatic heating injection device, including support frame and being arranged on the automatic heating device and injection device of support frame, injection device is arranged below automatic heating device.The present application is through being equipped with automatic heating device and injection device, instead of artificial direct operation using viscous liquid, solve the problem that artificial injection is not fully fused with reaction kettle material liquid, save injection time, avoid unsafe contact of people, fully add the viscous liquid gram of prepared viscous liquid to the material liquid in reaction kettle, avoid waste when viscous liquid is residual in beaker container during manual operation, make intermediate formula more accurate and effective;Set up feeding pipeline and discharge pipeline, it is convenient to send the viscous liquid after heating to the reaction kettle of stirring;Gyroscopic valve and check valve are equipped, ensure that viscous liquid is transported in one direction, it will not affect the normal transfer of viscous liquid;Set up air cylinder, reduce labor intensity, make feeding stable, accurate and effective.

[0004] The coupling agent of the above scheme belongs to organic chemical substance, has the characteristic of flammable, is not suitable for high-temperature heating drop, the above scheme can only realize liquid drop, cannot realize viscous liquid atomization and spray addition.

[0005] In summary, the defects of the prior art are: 1. Manual drop adding cannot control the flow rate of liquid drop adding, and the liquid may be added too fast or too slow by human means, if the liquid is added too fast, the coupling agent will be gathered together, and it is not easy to mix uniformly, so that the functionality of the product is reduced; 2. The added drop adding funnel and drop adding pipeline will have liquid residues, and in the continuous drop adding process, the inner wall of the pipeline will form a capillary effect, and the drop adding will be slower and slower in the later period, and even water absorption crystallization will occur, so that the pipeline is blocked, and uniform drop adding cannot be ensured.

[0006] Therefore, in order to improve the process technology, in view of the above defects, a viscous liquid quantitative feeding device for epoxy plastic sealing material production is provided. Content of the utility model

[0007] The utility model aims at the defects of the prior art, and provides a viscous liquid quantitative feeding device for epoxy plastic sealing material production to solve the problems in the background art.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: a viscous liquid quantitative feeding device for epoxy plastic sealing material production, including gear pump host box, one end of gear pump host box is installed with gear pump, the top liquid inlet of gear pump is connected with sinking funnel through connecting pipe, liquid level controller is installed on connecting pipe, the liquid outlet of gear pump is connected with gear pump blanking pipe, and one end of gear pump blanking pipe is installed with blanking valve.

[0009] The bottom of the gear pump host box is provided with a movable support, and the four corners of the movable support are provided with an electric telescopic rod.

[0010] As a preferred technical scheme of the utility model, a host operation display screen is installed on the gear pump host box.

[0011] As a preferred technical scheme of the utility model, the sinking funnel is installed on the support through bolts, and the support is installed on the movable support through bolts.

[0012] As a preferred technical scheme of the utility model, the electric telescopic rod and the castor are both installed on the movable support through bolts, and the supporting foot pad is installed on the bottom of the electric telescopic rod through bolts.

[0013] As a preferred technical scheme of the utility model, the diameter of the connecting pipe is selected to be less than or equal to 2cm.

[0014] As a preferred technical scheme of the utility model, the host operation display screen is electrically connected with the liquid level controller and the blanking valve.

[0015] Compared with the prior art, the device has the advantages that

[0016] The device selects a gear pump to control the flow rate, a hopper feeding liquid level controller to control the addition amount, and an electromagnetic valve to control the feeding cutoff, thereby preventing automatic dripping of the liquid due to gravity factors. The device is suitable for a laboratory to process materials of different products in batches, converts manual dripping into automatic dripping, ensures the uniformity of the material dripping speed, and avoids the capillary effect of the flow valve of the unpowered hopper.

[0017] The device ensures accurate control of the amount of viscous coupling agent added, uniformly drips the coupling agent into the high-stirring equipment, uniformly mixes a large amount of powder and a small amount of liquid, and avoids the uncertainty of manual feeding speed and the blockage of the flow channel. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 The figure is a structural schematic view of the device;

[0019] Fig. 2 The figure is a side view of the device;

[0020] Fig. 3 The figure is a front view of the device.

[0021] In the figure: 1, gear pump main box; 2, sinking hopper; 3, liquid level controller; 4, gear pump; 5, gear pump discharge pipe; 6, discharge valve; 7, movable support; 8, electric telescopic rod; 9, support foot pad; 10, caster; 11, main machine operation display screen. DETAILED DESCRIPTION

[0022] The preferred embodiments of the device will be described in detail below with reference to the drawings, so that the advantages and features of the device can be more easily understood by those skilled in the art, and the protection scope of the device can be more clearly and explicitly defined.

[0023] Embodiment: Please refer to Figs. 1-3 The device has the advantages that

[0024] The bottom of the gear pump main machine box 1 is provided with a movable support 7, and the four corners of the movable support 7 are provided with electric telescopic rods 8, and the bottom of the electric telescopic rod 8 is provided with a supporting foot pad 9, and the four corners of the bottom of the movable support 7 are provided with casters 10, which can be moved through the movable support 7, and the supporting foot pad 9 can be retracted through the electric telescopic rod 8, and the entire device can be supported by the supporting foot pad 9.

[0025] The gear pump main machine box 1 is provided with a main machine operation display screen 11.

[0026] The sinking funnel 2 is bolted on the support, and the support is bolted on the movable support 7.

[0027] The electric telescopic rod 8 and the caster 10 are bolted on the movable support 7, and the supporting foot pad 9 is bolted on the bottom of the electric telescopic rod 8.

[0028] The diameter of the connecting pipe is selected to be less than 2cm.

[0029] The main machine operation display screen 11 is electrically connected with the liquid level controller 3 and the discharge valve 6.

[0030] Working principle: a kind of viscous liquid quantitative feeding device for epoxy plastic sealing material premixing, which is used for viscous coupling agent liquid with viscosity >0.4Pa·s at 25℃;The sinking funnel 3 is connected with pipeline at the lower part, and the diameter of the pipeline is selected to be less than 2cm, because the liquid level will have millimeter up and down line control, in order to make the mass of the added material constant, so the pipeline is selected to be as thin as possible, while meeting the requirements of internal operation of the machine;The sinking funnel 101 is provided with a liquid level controller 3 at the lower part of the pipeline, first fill the entire machine cavity with mixed uniform multiple coupling agent complex liquid, at this time the liquid level meter light is on, then discharge the excess material with the machine, at this time the liquid level meter control, when the liquid level is lower than the detection interface, the light will be off, then add the weight according to the formula single weighing in advance, at this time the light is bright, set the parameters, start the main machine, normal drop, when the liquid level is lower than the liquid level control, stop feeding, the discharge valve 6 (solenoid valve) is connected with the liquid level controller in series, when the liquid level controller stops feeding the main machine, the discharge valve 6 (solenoid valve) will also be closed at the same time.

[0031] The gear pump in the gear pump main machine box 1 rotates through the screw rod, so that the rotor in the machine rotates continuously, according to the speed, the material is discharged uniformly, the gear pump discharges viscous liquid with the same volume, and the error can be controlled within 0.1g, the precision is very high. It is used for viscous coupling agent liquid, and the discharge speed is uniform and the quality is stable.

[0032] Gear pump discharge pipe 5 links hose, the selection of hose link is because the material needs to be added through the feeding port above the high-speed mixer, so the machine is large and heavy, therefore, the hose link discharge valve 6 is selected, the discharge valve 6 in the present application transmits signals with the liquid level controller 3, the discharge valve 6 is opened when the host operating display screen 11 pneumatically feeds, and the discharge valve 6 is closed when the host operating display screen 11 pneumatically stops feeding.

[0033] The main function of the discharge valve 6 is to prevent the material from automatically dripping downward due to gravity after stopping feeding, and the material in the rotor is discharged under pressure, and the material also has the phenomenon of dripping due to inertia according to the pipeline flow, therefore, the discharge valve 6 is added for control, and the discharge valve 6 in the present application is mainly applied as an electromagnetic valve.

[0034] Because there is a spraying addition method in the production process, the equipment needs to be replaced, in order to save the operation space on site and better protect the equipment, a movable support 7 is added, the bottom of the movable support 7 is provided with a wheel 10 for facilitating pushing, when it is necessary to fix, an electric telescopic rod 8 is used to work, the supporting foot pad 9 is extended to the ground, thereby playing a supporting role and improving the stability.

[0035] The viscous liquid coupling agent can be uniformly added to the high-speed solid powder mixer, the viscosity of the viscous liquid added herein is greater than 0.4 Pa·s at 25 DEG C. For the liquid with poor flowability and easy adhesion, and the material that cannot be heated, the atomization technology cannot be realized at present, and only the dripping method can be selected.

[0036] The device aims to uniformly control the flow of the added viscous liquid coupling agent, mainly applies the gear rotation and extrusion mode, controls the flow through the speed, thereby controlling the dripping speed of the discharge, and then accurately controls the addition quality of the mixed materials through the liquid level controller, so that the materials are uniformly mixed into the powder of the epoxy plastic packaging material semi-finished product. Therefore, the problems that the flow cannot be accurately controlled by manual dripping, the pipeline is blocked due to crystallization caused by the dripping of the flow valve, and the flow rate of the material becomes slower and slower in the later period are solved. The device fundamentally solves the flow rate problem, and increases the liquid level meter and the material electromagnetic valve double control scheme, prevents the material from naturally dripping, guarantees the quality conservation, is high in efficiency and clean, and guarantees no pollution between batches.

[0037] The above embodiments only express the implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A viscous liquid quantitative feeding device for epoxy encapsulant production, comprising a gear pump main cabinet (1), characterized in that: The gear pump main box (1) is provided with a gear pump (4) at one end, the top liquid inlet of the gear pump (4) is connected with a sunken funnel (2) through a connecting pipe, a liquid level controller (3) is installed on the connecting pipe, the liquid outlet of the gear pump (4) is connected with a gear pump discharge pipe (5), and one end of the gear pump discharge pipe (5) is provided with a discharge valve (6); The gear pump main box (1) is provided with a movable support (7) at the bottom, and the four corners of the movable support (7) are provided with electric telescopic rods (8), the bottom of the electric telescopic rod (8) is provided with a supporting foot pad (9), and the four corners of the bottom of the movable support (7) are provided with casters (10).

2. The thick liquid dosing device for epoxy encapsulating material production according to claim 1, characterized in that: The gear pump main box (1) is provided with a main machine operation display screen (11).

3. The thick liquid dosing device for producing epoxy encapsulating material according to claim 1, characterized in that: The sunken funnel (2) is installed on the support through bolts, and the support is installed on the movable support (7) through bolts.

4. The thick liquid dosing device for producing epoxy encapsulating material according to claim 1, wherein: The electric telescopic rod (8) and the caster (10) are both installed on the movable support (7) through bolts, and the supporting foot pad (9) is installed on the bottom of the electric telescopic rod (8) through bolts.

5. The thick liquid dosing device for producing epoxy encapsulating material according to claim 1, characterized in that: The diameter of the connecting pipe is selected to be less than or equal to 2cm.

6. The thick liquid dosing device for producing epoxy encapsulating material according to claim 2, characterized in that: The main machine operation display screen (11) is electrically connected with the liquid level controller (3) and the discharge valve (6).

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