Wood powder compression molding equipment

Abstract

The utility model discloses wood flour compression molding equipment, belongs to the technical field of compression molding, and solves the problems that the number of toys subjected to compression molding at present has the problem in the aspect of demolding after molding, and due to the fact that the toys are subjected to compression molding by applying certain high temperature and pressure, the toys cannot be demolded easily. Therefore, the problem that the mould-pressed toys are attached in the forming cavity of the lower mould and are difficult to demould is solved. Comprising an upper die and a lower die, electric heating wires are arranged in the upper die and the lower die, a flow channel with the two ends penetrating through the side wall of the lower die is further arranged in the lower die, the side wall of the lower die is fixedly connected with a first connecting pipe and a second connecting pipe which are communicated with the two ends of the flow channel, and the first connecting pipe is communicated with an external water source. In the die forming process, the controller and the sensor are used for controlling the heating wire to heat, the hydraulic cylinder to press and the water pump to pump water to cool, so that the toy is separated from the die, and the toy can be conveniently taken out and prepared for next operation.

Description

Technical Field

[0001] The utility model relates to the field of molding technology, in particular to a wood powder molding equipment. Background Art

[0002] The molding of wood powder toys is a process in which wood powder is mixed with plastic or other adhesives and then formed in a mold under high temperature and pressure. The toys made by this process not only have the natural texture and color of wood, but also have the lightness and durability of plastic. During the molding process, after the wood powder and plastic raw materials are evenly mixed, they are sent into the mold. Under a certain temperature and pressure, the materials will quickly solidify and form the required toy shape. This molding method can precisely control the size and shape of the toy, reduce material waste, and improve production efficiency. The surface of the molded toy is smooth and has strong detail expressiveness, which is suitable for making various complex-shaped toys.

[0003] Currently, there are more or less problems with the demolding of molded toys after molding. Since the molding is carried out by applying a certain high temperature and pressure, the molded toy will adhere to the molding cavity of the lower mold and is difficult to demold.

[0004] Therefore, a wood powder molding equipment is proposed to solve or alleviate the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art and to propose a wood powder molding equipment.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A wood powder molding equipment includes an upper mold and a lower mold. Electric heating wires are arranged in both the upper mold and the lower mold. A flow channel with both ends penetrating through its side wall is also arranged in the lower mold. A first connecting pipe and a second connecting pipe communicating with both ends of the flow channel are fixedly connected to the side wall of the lower mold. The first connecting pipe communicates with an external water source, the second connecting pipe communicates with a water pump, and a first three-way solenoid valve and a second three-way solenoid valve are respectively communicated with the first connecting pipe and the second connecting pipe. The first three-way solenoid valve communicates with an air pipe, and the air pipe communicates with an air pump. The flow channel is alternately filled with air or water.

[0008] Preferably, it further includes a working circuit, and the working circuit controls the start and stop of the first three-way solenoid valve, the second three-way solenoid valve, the air pump, and the water pump according to the temperature of the lower mold and the water flow rate in the flow channel.

[0009] Preferably, the working circuit includes

[0010] A temperature sensor, whose probe abuts against the side wall of the lower mold, and the temperature sensor collects the temperature of the lower mold and feeds back a temperature signal;

[0011] A first voltage comparison circuit, whose input terminal is coupled to the output terminal of the temperature sensor, and the first voltage comparison circuit receives the temperature signal and feeds back a first comparison signal after the temperature signal is greater than the temperature reference signal therein;

[0012] A liquid flow sensor, whose probe is arranged in the flow channel, and the liquid flow sensor collects the liquid flow in the flow channel and feeds back a flow signal;

[0013] A second voltage comparison circuit, whose input terminal is coupled to the output terminal of the liquid flow sensor, and the second voltage comparison circuit receives the flow signal and feeds back a second comparison signal after the flow signal is less than the flow reference signal therein;

[0014] A controller, whose input terminal is coupled to the output terminals of the first voltage comparison circuit and the second voltage comparison circuit, and the controller controls the first three-way solenoid valve, the second three-way solenoid valve and the air pump to be powered on and work, or controls the water pump to be powered on and work after receiving the first comparison signal and the second comparison signal.

[0015] Preferably, the working circuit further includes a switching circuit, whose input terminal is coupled to the output terminal of the controller, and the switching circuit controls the first three-way solenoid valve, the second three-way solenoid valve and the air pump to be powered on and work, or controls the water pump to be powered on and work.

[0016] Preferably, the working circuit further includes a trigger circuit, whose input terminal is coupled to the output terminal of the controller, and the trigger circuit is controlled by the controller to determine the on-off of the heating wire.

[0017] Preferably, it further includes a workbench, on which several columns are fixedly connected, the tops of the several columns are fixedly connected to a top plate together, the hydraulic cylinder is vertically fixedly connected to the top plate, and the piston rod of the hydraulic cylinder penetrates through the top plate and is fixedly connected to a moving plate, the columns penetrate through the moving plate, the upper mold is fixedly connected to the bottom surface of the moving plate, the lower mold is fixedly connected to the workbench, and the hydraulic cylinder is coupled to the controller.

[0018] Preferably, both the first voltage comparison circuit and the second voltage comparison circuit are voltage comparators, the trigger circuit is a triode switch, the base of the triode switch is coupled to the output terminal of the controller, the collector of the triode switch is powered on, the emitter of the triode switch is connected to the heating wire and then grounded, the controller is an STM32 single-chip microcomputer, and the switching circuit includes two relays, one of the relays is connected in series with the first three-way solenoid valve, the second three-way solenoid valve and the air pump, and the other relay is connected in series with the water pump.

[0019] Preferably, both the three-way solenoid valve 1 and the three-way solenoid valve 2 are two-position three-way solenoid valves.

[0020] The utility model has the following beneficial effects:

[0021] During the molding process of the utility model, the heating wire is heated, the hydraulic cylinder is pressed, and the water pump pumps water for cooling through the controller and the sensor, realizing the separation of the toy and the mold, facilitating the extraction and preparing for the next operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 is a schematic structural diagram of the present utility model;

[0024] Figure 2 is a structural block diagram of the working circuit in the present utility model.

[0025] 1. Workbench; 2. Column; 3. Top plate; 4. Hydraulic cylinder; 5. Moving plate; 6. Upper mold; 7. Lower mold; 8. Controller; 9. Trigger circuit; 10. Heating wire; 11. Water pump; 12. Temperature sensor; 13. Voltage comparison circuit 1; 14. Liquid flow sensor; 15. Voltage comparison circuit 2; 16. Switching circuit; 17. Three-way solenoid valve 1; 18. Three-way solenoid valve 2; 19. Air pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0028] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it will not be necessary to further define and explain it in subsequent figures.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0030] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] A wood powder molding device, as Figure 1 shown, includes a workbench 1, an upper mold 6 and a lower mold 7. A plurality of columns 2 are fixedly connected to the workbench 1. The top surfaces of the plurality of columns 2 are commonly fixedly connected to a top plate 3. A hydraulic cylinder 4 is vertically fixedly connected to the top plate 3, and the piston rod of the hydraulic cylinder 4 passes through the top plate 3 and is fixedly connected to a moving plate 5. The columns 2 pass through the moving plate 5. The upper mold 6 is fixedly connected to the bottom surface of the moving plate 5. The lower mold 7 is fixedly connected to the workbench 1. The hydraulic cylinder 4 is coupled to a controller 8. Electric heating wires 10 are provided in both the upper mold 6 and the lower mold 7, and a flow channel with both ends passing through the side wall is further provided in the lower mold 7. A first connecting pipe and a second connecting pipe communicating with both ends of the flow channel are fixedly connected to the side wall of the lower mold 7. The first connecting pipe communicates with an external water source, the second connecting pipe communicates with a water pump 11, and a first three-way solenoid valve 17 and a second three-way solenoid valve 18 are respectively communicated with the first connecting pipe and the second connecting pipe. The first three-way solenoid valve 17 communicates with an air pipe, the air pipe communicates with an air pump 19, and air or water is alternately filled in the flow channel.

[0033] It also includes a working circuit, which controls the start and stop of the first three-way solenoid valve 17, the second three-way solenoid valve 18, the air pump 19, and the water pump 11 according to the temperature of the lower mold 7 and the water flow rate in the runner. Both the first three-way solenoid valve 17 and the second three-way solenoid valve 18 are two-position three-way solenoid valves.

[0034] As Figure 2 shown, the working circuit includes a temperature sensor 12, a first voltage comparison circuit 13, a liquid flow sensor 14, a second voltage comparison circuit 15, a controller 8, a switching circuit 16, and a trigger circuit 9.

[0035] The probe of the temperature sensor 12 abuts against the side wall of the lower mold 7. The temperature sensor 12 collects the temperature of the lower mold 7 and feeds back a temperature signal. The input end of the first voltage comparison circuit 13 is coupled to the output end of the temperature sensor 12. The first voltage comparison circuit 13 receives the temperature signal and feeds back a first comparison signal after the temperature signal is greater than the temperature reference signal therein. The probe of the liquid flow sensor 14 is arranged in the runner. The liquid flow sensor 14 collects the liquid flow rate in the runner and feeds back a flow signal. The input end of the second voltage comparison circuit 15 is coupled to the output end of the liquid flow sensor 14. The second voltage comparison circuit 15 receives the flow signal and feeds back a second comparison signal after the flow signal is less than the flow reference signal therein. The input end of the controller 8 is coupled to the output ends of the first voltage comparison circuit 13 and the second voltage comparison circuit 15. After receiving the first comparison signal and the second comparison signal, the controller 8 controls the first three-way solenoid valve 17, the second three-way solenoid valve 18, and the air pump 19 to be powered on for operation, or controls the water pump 11 to be powered on for operation. The input end of the switching circuit 16 is coupled to the output end of the controller 8. The switching circuit 16 controls the first three-way solenoid valve 17, the second three-way solenoid valve 18, and the air pump 19 to be powered on for operation, or controls the water pump 11 to be powered on for operation. The input end of the trigger circuit 9 is coupled to the output end of the controller 8. The trigger circuit 9 is controlled by the controller 8 to determine the on-off of the heating wire 10.

[0036] Both the first voltage comparison circuit 13 and the second voltage comparison circuit 15 are voltage comparators. The trigger circuit 9 is a triode switch. The base of the triode switch is coupled to the output end of the controller 8. The collector of the triode switch is powered on. The emitter of the triode switch is connected to the heating wire 10 and then grounded. The controller 8 is an STM32 single-chip microcomputer. The switching circuit 16 includes two relays. One relay is connected in series with the first three-way solenoid valve 17, the second three-way solenoid valve 18, and the air pump 19. The other relay is connected in series with the water pump 11.

[0037] When the present utility model actually performs wood powder molding, after the wood-plastic powder fills the lower mold 7, the controller 8 sends a signal to the trigger circuit 9, and the trigger circuit 9 makes the heating wire 10 energized and heated, so that the temperatures of the upper mold 6 and the lower mold 7 rise. Then, the controller 8 controls the hydraulic cylinder 4 to push the moving plate 5 and the upper mold 6 to move downward, so that the upper mold 6 and the lower mold 7 are pressed together for hot pressing. At this time, the inside of the runner is mainly air. After the hot pressing is completed, the upper mold 6 and the lower mold 7 are separated. At this time, the temperature sensor 12 and the liquid flow sensor 14 can detect the temperature of the lower mold 7 and the liquid flow in the runner. If the temperature of the lower mold 7 exceeds the preset temperature and the liquid flow in the runner is less than the preset flow rate, a comparison signal one and a comparison signal two can be sent to the controller 8, and the controller 8 controls the on-off of the relay. At this time, the water pump 11 gets electricity and starts to work. It sucks the external water source through the connecting pipe one and the connecting pipe two, so that the water in the runner is always flowing, and heat exchange is carried out with the lower mold 7, and then the temperature reduction of the lower mold 7 and the molded toy is completed, so that the toy molded in the lower mold 7 can be separated from the inner wall of the lower mold 7, so that the operator can take out the toy, and the toy undergoes a certain heat exchange, and its temperature will not be too high. When the next work needs to be carried out, the controller 8 controls the three-way solenoid valve one 17, the three-way solenoid valve two 18, and the air pump 19 to be energized, so that the connecting pipe one and the connecting pipe two are blocked, and the three-way solenoid valve one 17 and the three-way solenoid valve two 18 connect the trachea and the outside to the runner. Under the action of the air pump 19, the air is pumped into the trachea and the runner, so that the water in the runner is squeezed out from the other opening of the three-way solenoid valve two 18.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A wood powder molding equipment, characterized in that: The invention comprises an upper mold (6) and a lower mold (7), wherein both the upper mold (6) and the lower mold (7) are provided with electric heating wires (10), and the lower mold (7) is also provided with a flow channel with two ends penetrating its side wall, and the side wall of the lower mold (7) is fixedly connected with a connecting pipe 1 and a connecting pipe 2 which are connected with the two ends of the flow channel, the connecting pipe 1 is connected with an external water source, the connecting pipe 2 is connected with a water pump (11), and the connecting pipe 1 and the connecting pipe 2 are also respectively connected with a three-way electromagnetic valve 1 (17) and a three-way electromagnetic valve 2 (18), the three-way electromagnetic valve 1 (17) is connected with an air pipe, and the air pipe is connected with an air pump (19), and the flow channel is alternately filled with air or water.

2. The wood powder molding equipment according to claim 1, characterized in that: It also includes a working circuit, which controls the start and stop of a three-way solenoid valve (17), a three-way solenoid valve (18), an air pump (19), and a water pump (11) according to the temperature of the lower mold (7) and the water flow rate in the flow channel.

3. The wood powder molding equipment according to claim 2, characterized in that: The working circuit comprises A temperature sensor (12), a probe of which contacts the side wall of the lower mold (7), and the temperature sensor (12) collects the temperature of the lower mold (7) and feeds back a temperature signal; A voltage comparison circuit (13) having an input end coupled to an output end of the temperature sensor (12), wherein the voltage comparison circuit (13) receives a temperature signal and feeds back a comparison signal (1) when the temperature signal is greater than a temperature reference signal; A liquid flow sensor (14), a probe of which is arranged in the flow channel, and the liquid flow sensor (14) collects the liquid flow in the flow channel and feeds back a flow signal; A second voltage comparison circuit (15), whose input end is coupled to the output end of the liquid flow sensor (14), wherein the second voltage comparison circuit (15) receives the flow signal and feeds back a second comparison signal after the flow signal is smaller than a flow reference signal; A controller (8), wherein an input end of the controller (8) is coupled to an output end of a voltage comparison circuit 1 (13) and a voltage comparison circuit 2 (15); after receiving a comparison signal 1 and a comparison signal 2, the controller (8) controls a three-way solenoid valve 1 (17), a three-way solenoid valve 2 (18) and an air pump (19) to be powered on, or controls a water pump (11) to be powered on.

4. The wood powder molding equipment according to claim 3, characterized in that: The working circuit further comprises a switching circuit (16), the input end of the switching circuit (16) being coupled to the output end of the controller (8), and the switching circuit (16) controlling the three-way solenoid valve 1 (17), the three-way solenoid valve 2 (18) and the air pump (19) to be powered on or to be operated, or controlling the water pump (11) to be powered on or to be operated.

5. The wood powder molding equipment according to claim 4, characterized in that: The working circuit also includes a trigger circuit (9), the input end of the trigger circuit (9) is coupled to the output end of the controller (8), and the trigger circuit (9) is controlled by the controller (8) to determine whether the heating wire (10) is powered on or off.

6. The wood powder molding equipment according to claim 5, characterized in that: It also includes a workbench (1) and a hydraulic cylinder (4), wherein a plurality of columns (2) are fixedly connected to the workbench (1), and the top surfaces of the plurality of columns (2) are commonly fixedly connected to a top plate (3), the hydraulic cylinder (4) is vertically fixedly connected to the top plate (3), and the piston rod of the hydraulic cylinder (4) passes through the top plate (3) and is fixedly connected to a movable plate (5), the columns (2) are arranged to pass through the movable plate (5), the upper mold (6) is fixedly connected to the bottom surface of the movable plate (5), the lower mold (7) is fixedly connected to the workbench (1), and the hydraulic cylinder (4) is coupled to a controller (8).

7. The wood powder molding equipment according to claim 6, characterized in that: The voltage comparison circuit 1 (13) and the voltage comparison circuit 2 (15) are both voltage comparators. The trigger circuit (9) is a transistor switch. The base of the transistor switch is coupled to the output end of the controller (8). The collector of the transistor switch is connected to electricity. The emitter of the transistor switch is connected to the heating wire (10) and then to ground. The controller (8) is an STM32 single-chip microcomputer. The switching circuit (16) includes two relays, one of which is connected in series with a three-way solenoid valve 1 (17), a three-way solenoid valve 2 (18), and an air pump (19), and the other is connected in series with a water pump (11).

8. The wood powder molding equipment according to claim 2, characterized in that: The three-way solenoid valve 1 (17) and the three-way solenoid valve 2 (18) are both two-position three-way solenoid valves.

Images