CN114523615A - Injection molding method - Google Patents

Abstract

An injection molding process comprising the steps of: according to the raw material specification of the production instruction list, preparing required raw materials; heating the raw materials by using heating equipment, adding the raw materials into a feed hopper after thirty minutes of heating, and starting injection molding; the input part inputs a command to enable the switching valve to switch a required working state, and a temperature sensor detects the temperature of raw materials in the feed hopper during injection molding; and after the injection molding is finished, closing the power switch, and cleaning the injection molding machine.

Description

Injection molding method

Technical Field

The invention relates to the technical field of injection molding machine devices, in particular to an injection molding method.

Background

An injection molding machine is a main molding device for making thermoplastic plastics or thermosetting plastics into plastic products with various shapes by using a plastic molding die.

In actual production practice, there are the following problems:

1. the injection molding machine mold closing box in the prior art comprises a forming mold, and materials are extruded and injected into the forming mold through a screw, but the unit flow rate of injection is uniform, and the problem that the large-flow injection is required for some parts and the small-flow injection is not solved for different conditions, such as different sizes of all parts of the mold.

2. In the prior art, the injection molding machine introduces materials through the hopper, and controls the on-off of the hopper through the valve, but the existing valve such as CN211221907U, the valve of which is arranged on the hopper, cannot be designed to be too large, the throughput of the through hole in the valve is smaller, and the final introduction amount of the hopper is smaller than the aperture of the hopper.

3. In the three-way valve in the prior art, three-way valves can be switched respectively, but single-in and double-out cannot be realized, the through-flow size of the three-way valve is difficult to guarantee after a plurality of channels are arranged in the three-way valve, each channel cannot be too long, and the alignment of each channel of a valve core and a valve port of the three-way valve needs high-precision processing or driving by the plurality of channels.

4. The blanking channels in the prior art often have only a blanking function but no blanking switching function, and the channels cannot be communicated without interference during blanking.

5. The baffle of prior art can only realize the closing of one direction, and when the baffle rotated along with the motor, can't realize the rotation of two directions of anterograde reversal and close.

Disclosure of Invention

In order to overcome the above problems, the present invention proposes a solution to solve the above problems simultaneously.

The technical scheme adopted by the invention for solving the technical problems is as follows: an injection molding method is characterized in that an injection molding machine is used for injection molding, and the injection molding machine comprises a rack, a mold closing box, a controller, a feed hopper, an injection box, an injection molding machine barrel, a power switch, a switching valve and a motor; wherein the power switch is arranged on the frame, and the controller comprises an input part; the mould closing box and the injection box are fixed above the rack, the controller is arranged on the mould closing box, and the injection machine barrel is arranged between the mould closing box and the injection box; a first groove and a second groove are formed above the injection box, the switching valve is fixed in the first groove, the upper surface of the switching valve is higher than the upper surface of the injection box, and the feed hopper is fixedly arranged above the switching valve; the motor is arranged in the second groove, the height of the second groove is smaller than that of the first groove, and the motor is used as the switching valve to provide power; the injection molding method comprises the following steps:

step 1.1: according to the raw material specification of the production instruction list, preparing required raw materials; heating the raw materials by using heating equipment, adding the raw materials into a feed hopper after thirty minutes of heating, and starting injection molding;

step 1.2: the input part inputs a command to enable the switching valve to switch a required working state, and a temperature sensor detects the temperature of raw materials in the feed hopper during injection molding;

step 1.3: after the injection molding is finished, closing the power switch, and cleaning the injection molding machine;

the injection box comprises a driving cavity and an injection cavity, a driving device is arranged in the driving cavity, a first extrusion screw cavity and a second extrusion screw cavity are arranged in the injection box, the first extrusion screw cavity and the second extrusion screw cavity are not located at the same height, the diameter of the first extrusion screw cavity is larger than that of the second extrusion screw cavity, a first extrusion screw is arranged in the first extrusion screw cavity, and a second extrusion screw is arranged in the second extrusion screw cavity;

the switching valve comprises a valve body, a valve core, a first baffle, a second baffle, a first limit plate, a second limit plate, a blanking channel, a valve cavity, a first valve port, a second valve port, a first outlet and a second outlet; the valve body comprises a first valve port and a second valve port, the valve cavity comprises a first outlet and a second outlet, the first valve port is communicated with the first extrusion screw cavity through a first pipeline, the second valve port is communicated with the second extrusion screw cavity through a second pipeline, the valve core is internally provided with the blanking channel, and the blanking channel is internally provided with a first baffle and a second baffle;

when the valve core rotates to the position that the plane is in a horizontal position and the plane faces downwards, the blanking channel is communicated with the feed hopper, the first outlet is communicated with the first valve port, the second outlet is communicated with the second valve port, the lower end of the first baffle is flush with the plane at the moment, the lower end of the second baffle is higher than the upper end of the first baffle, a first limiting plate is arranged above the first baffle, a second limiting plate is arranged above the second baffle, the first baffle can rotate in the blanking channel, the second baffle can rotate in the blanking channel, the first baffle rotates anticlockwise to close the blanking channel, and the second baffle rotates clockwise to close the blanking channel;

in step 1.2, the working state includes: the first state: the valve core rotates to the position that the plane is in the horizontal position and the plane faces downwards; the second state: a first clearance is formed between the plane and the valve cavity and is communicated with the first valve port; in a third state, a second gap exists between the plane and the valve cavity, and the second gap is communicated with the second valve port.

Furthermore, a first cavity and a second cavity are arranged in the injection molding machine barrel.

Furthermore, the first cavity is internally provided with the first extrusion screw.

Further, the second cavity is internally provided with the second extrusion screw.

Further, the drive chamber is separated from the injection chamber by a partition.

Further, the frame includes legs.

Further, the power switch is connected with a main power supply.

Further, the main power supply is arranged in the rack.

Furthermore, a window is arranged on the die closing box.

Further, the injection box is arranged on the rack through a support leg.

The invention has the beneficial effects that:

1. in the point 1 proposed by the background art, a large-size extrusion screw and a small-size extrusion screw are adopted, and the two screws are switched or matched for use through a material source.

2. To the 2 nd point that the background art provided, set up two holding tanks at the upper surface of injection case, one holds the valve body motor, and the valve body has obtained the support like this, just can set up bigger size in order to guarantee bigger through-flow volume, and the valve body keeps partly exposing the convenient maintenance of state and operation moreover, and half of the valve body is in the recess, half is higher than the injection case upper surface can avoid filling up the hopper too high.

3. Aiming at the 3 rd point provided by the background technology, the multichannel three-way valve core is changed into a valve core with a part cut off, so that not only can single-channel switching be realized, but also 'single-in-double-out' can be realized; meanwhile, the cost is saved, the cut part can contain more materials during through flow, the through flow efficiency is improved, the cut part forms a part of a channel, the alignment of a valve port and a valve core channel can not be controlled accurately during processing, the cut part is less than half of a valve ball, the length of the blanking channel is greater than the radius of the valve ball, and the blanking channel can be longer to contain two baffles.

4. Aiming at the 4 th point provided by the background technology, a baffle plate for limiting rotation is arranged in a blanking channel in the valve core, so that materials can be prevented from undesirably leading to other channels.

5. To the 5 th point that the background art provided, set up two baffles in the inside blanking passageway of case, the motion stroke of two baffles is reciprocal to guarantee that no matter the motor is rotatory to which direction, all have a baffle under the one-way state and can guarantee to block in the blanking passageway.

Note: the foregoing designs are not sequential, each of which provides a distinct and significant advance in the present invention over the prior art.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of an injection molding machine apparatus according to the present invention

FIG. 2 is a sectional view of the valve core in a state of single-in and double-out when the double screws of the invention work simultaneously

FIG. 3 is a cross-sectional view of the valve core in a counterclockwise rotation of the motor of the present invention

FIG. 4 is a cross-sectional view of the valve core with a single pass when the motor of the present invention is rotating clockwise

FIG. 5 is a schematic view of the through-flow of the dual extrusion screw cavity within the injection box of the present invention

FIG. 6 is a process flow diagram of the method of operation of the injection molding machine apparatus of the present invention

In the figures, the reference numerals are as follows:

1. frame, 2, clamping box, 3, controller, 31, input part, 4, feed hopper, 5, injection box, 6, injection molding machine barrel, 7, power switch. 8. The device comprises a driving cavity 9, a switching valve 10, a motor 11, a valve body 12, a valve core 13, a first baffle 131, a second baffle 14, a second limiting plate 15, a first limiting plate 16, a blanking channel 17, a plane 18, a valve cavity 19, a first valve port 20, a second valve port 21, a first outlet 22, a second outlet 23, a first extrusion screw cavity 24, a second extrusion screw cavity 25, a first pipeline 26 and a second pipeline

Detailed Description

As shown in the figure: an injection molding method is characterized in that an injection molding machine is used for injection molding, and the injection molding machine comprises a rack, a mold closing box, a controller, a feed hopper, an injection box, an injection molding machine barrel, a power switch, a switching valve and a motor; the power switch is arranged on the rack, and the controller comprises an input part; the mould closing box and the injection box are fixed above the rack, the controller is arranged on the mould closing box, and the injection machine barrel is arranged between the mould closing box and the injection box; a first groove and a second groove are formed above the injection box, the switching valve is fixed in the first groove, the upper surface of the switching valve is higher than the upper surface of the injection box, and the feed hopper is fixedly arranged above the switching valve; the motor is arranged in the second groove, the height of the second groove is smaller than that of the first groove, and the motor is used as the switching valve to provide power; the injection molding method comprises the following steps:

step 1.1: according to the raw material specification of the production instruction list, preparing required raw materials; heating the raw materials by using heating equipment, adding the raw materials into a feed hopper after thirty minutes of heating, and starting injection molding;

step 1.2: the input part inputs a command to enable the switching valve to switch a required working state, and a temperature sensor detects the temperature of raw materials in the feed hopper during injection molding;

step 1.3: after the injection molding is finished, closing the power switch, and cleaning the injection molding machine;

the injection box comprises a driving cavity and an injection cavity, a driving device is arranged in the driving cavity, a first extrusion screw cavity and a second extrusion screw cavity are arranged in the injection box, the first extrusion screw cavity and the second extrusion screw cavity are not located at the same height, the diameter of the first extrusion screw cavity is larger than that of the second extrusion screw cavity, a first extrusion screw is arranged in the first extrusion screw cavity, and a second extrusion screw is arranged in the second extrusion screw cavity;

the switching valve comprises a valve body, a valve core, a first baffle, a second baffle, a first limit plate, a second limit plate, a blanking channel, a valve cavity, a first valve port, a second valve port, a first outlet and a second outlet; the valve body comprises a first valve port and a second valve port, the valve cavity comprises a first outlet and a second outlet, the first valve port is communicated with the first extrusion screw cavity through a first pipeline, the second valve port is communicated with the second extrusion screw cavity through a second pipeline, the valve core is internally provided with the blanking channel, and the blanking channel is internally provided with a first baffle and a second baffle;

when the valve core rotates to the position that the plane is in a horizontal position and the plane faces downwards, the blanking channel is communicated with the feed hopper, the first outlet is communicated with the first valve port, the second outlet is communicated with the second valve port, the lower end of the first baffle is flush with the plane at the moment, the lower end of the second baffle is higher than the upper end of the first baffle, a first limiting plate is arranged above the first baffle, a second limiting plate is arranged above the second baffle, the first baffle can rotate in the blanking channel, the second baffle can rotate in the blanking channel, the first baffle rotates anticlockwise to close the blanking channel, and the second baffle rotates clockwise to close the blanking channel;

in step 1.2, the working state includes: the first state: the valve core rotates to the position that the plane is in the horizontal position and the plane faces downwards; the second state: a first clearance is formed between the plane and the valve cavity and is communicated with the first valve port; in a third state, a second gap exists between the plane and the valve cavity, and the second gap is communicated with the second valve port.

As shown in the figure: a first cavity and a second cavity are arranged in the injection molding machine barrel. The first cavity is internally provided with the first extrusion screw. The second cavity is internally provided with the second extrusion screw. The drive chamber is separated from the injection chamber by a partition. The frame includes legs. The power switch is connected with a main power supply. The main power supply is arranged in the rack. And a window is arranged on the die closing box. The injection box is arranged on the frame through a support leg.

The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An injection molding method, which utilizes an injection molding machine to carry out injection molding, is characterized in that: the injection molding machine comprises the rack, the mold closing box, a controller, a feed hopper, an injection box, an injection molding machine barrel, a power switch, a switching valve and a motor; the power switch is arranged on the rack, and the controller comprises an input part; the mould closing box and the injection box are fixed above the rack, the controller is arranged on the mould closing box, and the injection machine barrel is arranged between the mould closing box and the injection box; a first groove and a second groove are formed above the injection box, the switching valve is fixed in the first groove, the upper surface of the switching valve is higher than the upper surface of the injection box, and the feed hopper is fixedly arranged above the switching valve; the motor is arranged in the second groove, the height of the second groove is smaller than that of the first groove, and the motor is used as the switching valve to provide power; the injection molding method comprises the following steps:

step 1.1: according to the raw material specification of the production instruction list, preparing required raw materials; heating the raw materials by using heating equipment, adding the raw materials into a feed hopper after thirty minutes of heating, and starting injection molding;

step 1.2: the input part inputs a command to enable the switching valve to switch a required working state, and a temperature sensor detects the temperature of raw materials in the feed hopper during injection molding;

step 1.3: after the injection molding is finished, closing the power switch, and cleaning the injection molding machine;

the injection box comprises a driving cavity and an injection cavity, a driving device is arranged in the driving cavity, a first extrusion screw cavity and a second extrusion screw cavity are arranged in the injection box, the first extrusion screw cavity and the second extrusion screw cavity are not located at the same height, the diameter of the first extrusion screw cavity is larger than that of the second extrusion screw cavity, a first extrusion screw is arranged in the first extrusion screw cavity, and a second extrusion screw is arranged in the second extrusion screw cavity;

the switching valve comprises a valve body, a valve core, a first baffle, a second baffle, a first limit plate, a second limit plate, a blanking channel, a valve cavity, a first valve port, a second valve port, a first outlet and a second outlet; the valve body comprises a first valve port and a second valve port, the valve cavity comprises a first outlet and a second outlet, the first valve port is communicated with the first extrusion screw cavity through a first pipeline, the second valve port is communicated with the second extrusion screw cavity through a second pipeline, the valve core is internally provided with the blanking channel, and the blanking channel is internally provided with a first baffle and a second baffle;

when the valve core rotates to the position that the plane is in a horizontal position and the plane faces downwards, the blanking channel is communicated with the feed hopper, the first outlet is communicated with the first valve port, the second outlet is communicated with the second valve port, the lower end of the first baffle is flush with the plane at the moment, the lower end of the second baffle is higher than the upper end of the first baffle, a first limiting plate is arranged above the first baffle, a second limiting plate is arranged above the second baffle, the first baffle can rotate in the blanking channel, the second baffle can rotate in the blanking channel, the first baffle rotates anticlockwise to close the blanking channel, and the second baffle rotates clockwise to close the blanking channel;

in step 1.2, the working state includes: the first state: the valve core rotates to the position that the plane is in the horizontal position and the plane faces downwards; the second state: a first clearance is formed between the plane and the valve cavity and is communicated with the first valve port; in a third state, a second gap exists between the plane and the valve cavity, and the second gap is communicated with the second valve port.

2. An injection molding method according to claim 1, wherein: a first cavity and a second cavity are arranged in the injection molding machine barrel.

3. An injection molding method according to claim 2, wherein: the first cavity is internally provided with the first extrusion screw.

4. An injection molding method according to claim 3, wherein: the second cavity is internally provided with the second extrusion screw.

5. An injection molding method according to claim 1, wherein: the drive chamber is separated from the injection chamber by a partition.

6. An injection molding method according to claim 1, wherein: the frame includes legs.

7. An injection molding method according to claim 1, wherein: the power switch is connected with a main power supply.

8. An injection molding method according to claim 7, wherein: the main power supply is arranged in the rack.

9. An injection molding method according to claim 1, wherein: and a window is arranged on the die closing box.

10. An injection molding method according to claim 1, wherein: the injection box is arranged on the frame through a support leg.

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