Demolding device based on light-weight plastic product injection molding and using method thereof

Abstract

The demolding device comprises a fixing plate, a supporting plate, a fixed mold, a hydraulic push rod, a movable mold and a connecting rod, the connecting rod is movably connected with the movable mold in an inserted mode, mesh electrodes are fixedly connected to the sides, away from each other, of the movable mold and the fixed mold, and a connecting base is fixedly connected to one side of each mesh electrode; one end of the connecting seat is in series connection with a negative high-voltage power supply through a wire, the movable mold and the fixed mold are fixedly connected with concentric-square-shaped frames, the concentric-square-shaped frames are fixedly connected with protective sleeves, the upper sides and the lower sides of the protective sleeves are evenly and fixedly connected with first through holes, and the upper end of one protective sleeve is fixedly connected with two L-shaped plates; the movable mold and the fixed mold are charged with negative electricity, the atomizing nozzle and the water pump are matched to spray and atomize the release agent, and then the atomized release agent is charged with positive electricity by using the positive high-voltage power supply and the ionizer, so that the release agent is uniformly smeared in the mold cavity, the demolding quality of a plastic product is improved, and the problem that too much release agent is attached is solved.

Description

Technical Field

[0001] The invention relates to the field of plastic product demoulding, in particular to a demoulding device based on lightweight plastic product injection molding. Background Art

[0002] Plastic product demoulding refers to the process of removing plastic products from the mold during the injection molding process of plastic products. Usually, demoulding is an important step to ensure the quality of plastic products. During mass production, if demoulding is not thorough, it will lead to poor surface quality, deformation and other quality problems of plastic products, affecting the qualified rate of products.

[0003] Common demoulding methods include mechanical demoulding, gas-assisted demoulding or injection molding machine demoulding. During demoulding, a demoulding agent needs to be sprayed to facilitate the demoulding of subsequent injection molded products. It is common to spray the demoulding agent manually with a spray bottle within a certain period of time. However, manual spraying of the demoulding agent has problems such as uneven spraying and different amounts of demoulding agent before and after, which leads to excessive concentration of the demoulding agent and discoloration of the appearance of the injection molded parts.

[0004] Therefore, a demolding device based on injection molding of lightweight plastic products and a method of using the same are proposed. A mesh electrode is installed on the movable mold in conjunction with a negative high-voltage power supply to make the movable mold negatively charged. At the same time, a positive high-voltage power supply is used to connect an ionizer and an atomizing nozzle to spray a demolding agent. The atomized demolding agent can be evenly distributed in the inner cavities of the movable mold and the fixed mold, thereby improving the lightweight plastic products to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a demoulding device based on lightweight plastic product injection molding to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a demoulding device based on injection molding of lightweight plastic products, comprising a fixed plate, a support plate, a fixed mold, a hydraulic push rod, a movable mold and a connecting rod, wherein the connecting rod is movably plugged into the movable mold, and the movable mold and the fixed mold are both fixedly connected with a mesh electrode on the side away from each other, and a connecting seat is fixedly connected to one side of the mesh electrode, and one end of the connecting seat is connected in series with a negative high-voltage power supply through a wire, and the movable mold and the fixed mold are both fixedly connected with a return frame, and a protective cover is fixedly connected to the return frame, and the upper and lower sides of the protective cover are evenly fixedly connected with first through holes, and one of the protective covers is fixedly connected to two L-shaped plates on the upper end, and a liquid collecting pipe is fixedly connected between the two L-shaped plates, and the bottom end of the liquid collecting pipe is evenly fixedly connected with an atomizing nozzle, and an ionizer is arranged on the bottom side of the atomizing nozzle, and the ionizer is connected in series with a positive high-voltage power supply through a wire;

[0007] A cavity is provided in the fixing plate, a bracket is fixedly connected in the cavity, a fan is rotatably connected to the bracket, and second through holes are evenly provided on the upper end of the fixing plate;

[0008] A connecting plate is fixedly connected between the two support plates, heat pipes are evenly fixedly connected inside the connecting plate, an air pump is fixedly connected to one side of the upper end of the connecting plate, an air collecting pipe is fixedly connected to the output end of the air pump, and a nozzle is evenly fixedly connected to the bottom end of the air collecting pipe.

[0009] In a further embodiment, a buffer sleeve is fixedly connected to one of the protective sleeves, and the buffer sleeve corresponds to the output end of the hydraulic push rod. By providing the buffer sleeve, direct wear caused by direct contact is reduced.

[0010] In a further embodiment, a water pump is provided on the upper side of one of the protective sleeves, the water pump is fixedly connected to the L-shaped plate, the output end of the water pump is communicated with the liquid collecting pipe, and the water pump and the liquid collecting pipe are provided, and then connected to an external injection molding liquid cylinder to supply the atomizing nozzle.

[0011] In a further embodiment, a baffle is fixedly connected to the bottom end of one of the protective covers, the baffle is in contact with the fixed plate, and the baffle corresponds to the second through hole. The baffle is in an L-shaped structure, and the baffle is movably connected to the support plate. By setting the baffle, the second through hole on the fixed plate can be closed following the movement of the movable mold.

[0012] In a further embodiment, the fixed plate is located in the cavity and is fixedly connected to a liquid collecting plate, a third through hole is evenly opened on the liquid collecting plate, an arc-shaped block is fixedly connected to the third through hole, and by arranging the liquid collecting plate, the third through hole and the arc-shaped block, the excess release agent atomized liquid can be recovered.

[0013] In a further embodiment, both sides of the liquid collecting plate are fixedly connected to limiting plates, and the limiting plates are fixedly connected to the inner upper side of the fixed plate. By setting the limiting plates, excess atomized release agent can fall from the third through hole.

[0014] In a further embodiment, vertical plates are fixedly connected to both sides of the upper end of the fixed plate, the vertical plates are fixedly connected to the support plate, the fixed plate is provided with a guide groove on the bottom side of the cavity, a guide hole is provided on one side of the fixed plate and the guide hole is communicated with the guide groove, and by providing the guide groove and the guide hole, excess atomized release agent can be recovered and stored.

[0015] In a further embodiment, a baffle is fixedly connected to the upper side of the support plate, and a guide ramp is fixedly connected to the bottom side of the support plate. By arranging the guide ramp and the baffle, the hot air flow can be guided to evenly contact the moving mold and the fixed mold.

[0016] In a further embodiment, a distance sensor is fixedly connected to one side of the support plate, and the distance sensor corresponds to the shorter end of the baffle.

[0017] Preferably, the method for using the demoulding device based on lightweight plastic product injection molding described above comprises the following steps:

[0018] A. First, control the extension of the hydraulic push rod to gradually move the movable mold toward the fixed mold. The distance sensor monitors the distance between the baffle plate and the support plate, thereby controlling the atomizing nozzle to be at the center of the movable mold and the fixed mold.

[0019] A. Then, the negative high-voltage power supply cooperates with the mesh electrode to charge the movable mold and the fixed mold negatively, and then the positive high-voltage power supply ionizes to charge the release agent sprayed by the atomizing nozzle positively, so that the release agent sprayed by the atomizing nozzle can be evenly applied to the inner cavity of the movable mold and the fixed mold.

[0020] A. Finally, the excess release agent falls into the cavity of the fixed plate under the traction of gravity and the fan, and is blocked by the liquid collecting plate to form condensed liquid, and then falls into the guide groove to realize the recovery of the excess release agent.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: first, by charging a negative charge on the movable mold and the fixed mold, the atomized mold release agent is sprayed in cooperation with the atomizing nozzle and the water pump, and then the atomized mold release agent is charged with a positive charge by using a positive high-voltage power supply and an ionizer, thereby promoting the uniform application of the mold release agent in the mold cavity, improving the demolding quality of the plastic product, and reducing the problem of excessive adhesion of the mold release agent; then, when the movable mold is extended and moved by the hydraulic push rod, the air pump, the air collecting pipe and the nozzle make the air flow contact the heat pipe, and through the baffle and the guide inclined plate, the hot air contacts the movable mold and the fixed mold, which can preheat the movable mold and the fixed mold, and improve the contact effect between the mold release agent and the mold cavity; finally, the rotation of the fan drives the air flow and the excess atomized liquid into the cavity from the second through hole, and contacts the liquid collecting plate and the third through hole, collects the excess atomized mold release agent, and makes the atomized mold release agent fall into the guide groove under gravity conditions, thereby improving the recovery effect of the mold release agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side cross-sectional structural diagram of the present invention;

[0023] Figure 2 It is a three-dimensional structural diagram of the present invention;

[0024] Figure 3 It is a three-dimensional structural diagram of the movable mold of the present invention;

[0025] Figure 4 It is a three-dimensional structural diagram of the liquid receiving plate of the present invention;

[0026] Figure 5It is an enlarged structural diagram of location A of the present invention.

[0027] In the figure: 1. fixed plate; 2. support plate; 3. fixed mold; 4. hydraulic push rod; 5. moving mold; 6. mesh electrode; 7. connecting seat; 8. negative high-voltage power supply; 9. return frame; 10. protective cover; 11. first through hole; 12. L-shaped plate; 13. liquid collecting pipe; 14. atomizing nozzle; 15. water pump; 16. positive high-voltage power supply; 17. cavity; 18. fan; 19. second through hole; 20. buffer sleeve; 21. connecting rod; 22. connecting plate; 23. air pump; 24. gas collecting pipe; 25. heat pipe; 26. baffle plate; 27. guide inclined plate; 28. baffle plate; 29. ​​liquid collecting plate; 30. limit plate; 31. distance sensor; 32. vertical plate; 33. guide groove; 34. arc stopper. DETAILED DESCRIPTION

[0028] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] Manually spraying atomized release agent with a handheld spray bottle within a certain period will cause problems such as uneven atomization and low atomization efficiency.

[0031] See also Figure 1-5The present embodiment provides a demoulding device based on lightweight plastic product injection molding, including a fixed plate 1, a support plate 2, a fixed mold 3, a hydraulic push rod 4, a movable mold 5 and a connecting rod 21, one side of one of the support plates 2 is fixedly connected to the fixed mold 3, the movable mold 5 and the fixed mold 3 are made of conductive materials, the hydraulic push rod 4 is extended to drive the movable mold 5 to move toward the side of the fixed mold 3, the connecting rod 21 is movably connected to the movable mold 5, and the sides of the movable mold 5 and the fixed mold 3 that are away from each other are fixedly connected with a mesh electrode 6, one side of the mesh electrode 6 is fixedly connected with a connecting seat 7, and one end of the connecting seat 7 is connected to the fixed mold 3. A negative high-voltage power supply 8 is connected in series through a conducting wire, and the negative high-voltage power supply 8 is connected to the mesh electrode 6 to cause the movable mold 5 and the fixed mold 3 to be negatively charged. A return frame 9 is fixedly connected to the movable mold 5 and the fixed mold 3, and the return frame 9 is made of an insulating material. A protective cover 10 is fixedly connected to the return frame 9, and the protective cover 10 provides a barrier. The protective cover 10 is made of an insulating material, and the upper and lower sides of the protective cover 10 are evenly fixedly connected with first through holes 11, and one of the upper ends of the protective cover 10 is fixedly connected to two L-shaped plates 12, and a liquid collecting pipe 13 is fixedly connected between the two L-shaped plates 12. The liquid collecting pipe The bottom of 13 is evenly and fixedly connected with an atomizing nozzle 14, one end of a water pump 15 is connected with an external mold release agent cylinder, and the mold release agent is extracted and transmitted to the atomizing nozzle 14, and the positive high-voltage power supply 16 and the ionized gas are synchronously matched to make the mold release agent spray positively charged, so that the atomized mold release agent will adhere to the inner cavity of the movable mold 5 and the fixed mold 3, and an ionizer is arranged at the bottom side of the atomizing nozzle 14, and the ionizer is connected in series with the positive high-voltage power supply 16 through a wire; a cavity 17 is opened in the fixed plate 1, and a bracket is fixedly connected in the cavity 17, and a fan 18 is rotatably connected to the bracket, and the upper end of the fixed plate 1 is evenly opened There is a second through hole 19; a connecting plate 22 is fixedly connected between the two support plates 2, and a heat pipe 25 is evenly fixedly connected inside the connecting plate 22. An air pump 23 is fixedly connected to one side of the upper end of the connecting plate 22, and an air collecting pipe 24 is fixedly connected to the output end of the air pump 23. A nozzle is evenly fixedly connected to the bottom end of the air collecting pipe 24. The air pump 23 draws gas through the air collecting pipe 24 and the nozzle, contacts the heat pipe 25, and gradually forms a hot air flow, and then when the movable mold 5 moves, it can contact the movable mold 5 and the fixed mold 3 respectively, thereby preheating the movable mold 5 and the fixed mold 3, so that the release agent has a better adhesion effect.

[0032] Among them, a buffer sleeve 20 is fixedly connected to one of the protective sleeves 10, and the buffer sleeve 20 corresponds to the output end of the hydraulic push rod 4. By providing the buffer sleeve 20, the direct wear of the hydraulic push rod 4 and the movable mold 5 can be reduced.

[0033] Among them, a water pump 15 is arranged on the upper side of one of the protective sleeves 10, and the water pump 15 is fixedly connected to the L-shaped plate 12. The output end of the water pump 15 is communicated with the liquid collecting pipe 13. The release agent is extracted by the water pump 15 and sprayed evenly through the atomizing nozzle 14. Under the action of gravity and direction, the atomized release agent gradually moves downward.

[0034] Embodiment 2

[0035] When the atomizing nozzle 14 sprays the release agent, excess atomized release agent will overflow, resulting in waste of lightweight injection molded products during the demoulding process.

[0036] See also Figure 1-5 , further improvements are made on the basis of Example 1.

[0037] Among them, a baffle 28 is fixedly connected to the bottom end of one of the protective covers 10, the baffle 28 is in contact with the fixed plate 1, and the baffle 28 corresponds to the second through hole 19, the baffle 28 is an L-shaped structure, and the baffle 28 is movably connected to the support plate 2. By setting the baffle 28 to move synchronously with the movable mold 5, the second through hole 19 on the fixed plate 1 can be blocked, and the airflow and atomized release agent at the driven mold 5 and the fixed mold 3 can be guided.

[0038] Among them, the fixed plate 1 is located in the cavity 17 and is fixedly connected to a liquid collecting plate 29, on which third through holes are evenly opened, and an arc-shaped stopper 34 is fixedly connected in the third through hole. By setting the liquid collecting plate 29 to contact the airflow entering from the second through hole 19, the release agent can be recovered.

[0039] Among them, both sides of the liquid collecting plate 29 are fixedly connected with the limiting plates 30, and the limiting plates 30 are fixedly connected to the inner upper side of the fixing plate 1. By setting the limiting plates 30, the airflow and excess release agent can only enter from the third through hole.

[0040] Embodiment 3

[0041] When the atomizing nozzle 14 sprays the release agent, the temperature of the movable mold 5 and the fixed mold 3 will affect the demoulding of the plastic product.

[0042] See also Figure 1-5 , further improvements are made on the basis of Example 1.

[0043] Among them, vertical plates 32 are fixedly connected to both sides of the upper end of the fixed plate 1, and the vertical plates 32 are fixedly connected to the support plate 2. The fixed plate 1 is provided with a guide groove 33 on the bottom side of the cavity 17. The guide groove 33 is a right-angled trapezoidal structure. A guide hole is provided on one side of the fixed plate 1 and the guide hole is connected to the guide groove 33. By setting the guide groove 33, the falling release agent liquid can be received and guided to one side of the guide hole, thereby achieving the effect of facilitating recovery.

[0044] Among them, a baffle plate 26 is fixedly connected to the upper side of the support plate 2, and a guide inclined plate 27 is fixedly connected to the bottom side of the baffle plate 26 of the support plate 2. By setting the baffle plate 26 and the guide inclined plate 27, air holes are evenly opened on the guide inclined plate 27, so that the gas can be evenly distributed and cooperated with the air pump 23 and the heat pipe 25 to preheat the movable mold 5 and the fixed mold 3.

[0045] Among them, a distance sensor 31 is fixedly connected to one side of the support plate 2, and the distance sensor 31 corresponds to the shorter end of the baffle 28. By setting the distance sensor 31, the position of the movable mold 5 can be monitored. At the same time, when the collecting pipe 13 and the atomizing nozzle 14 are at the center of the upper side of the movable mold 5 and the fixed mold 3, the release agent can be sprayed more evenly.

[0046] Working principle: The extension of the hydraulic push rod 4 can move the movable mold 5 toward the fixed mold 3. During this process, the air pump 23 extracts gas through the gas collecting pipe 24 and the nozzle into the air flow to contact the heat pipe 25. The hot air flow provides hot air and preheating on the upper side of the movable mold 5 and the fixed mold 3. Then the distance sensor 31 monitors the distance between the movable mold 5 and the baffle 28. When the liquid collecting pipe 13 and the atomizing nozzle 14 are at the center of the upper side of the movable mold 5 and the fixed mold 3, the negative high-voltage power supply 8 is started and connected to the mesh electrode 6 through the wire, so that the movable mold 5 and the fixed mold 3 are negatively charged. Restart the positive high-voltage power supply 16 to prompt the ionizer to charge the atomized demolding liquid sprayed from the atomizing nozzle 14 with positive electricity, so that the positively charged atomized demolding liquid evenly contacts the inner cavities of the movable mold 5 and the fixed mold 3. At this time, the excess atomized demolding agent is pulled by the fan 18, and the demolding agent enters the cavity 17 from the second through hole 19. Then the airflow and the atomized demolding agent contact the liquid receiving plate 29, and are blocked by the third through hole and the arc-shaped block 34. The atomized demolding agent gradually liquefies and falls into the guide groove 33 under the action of gravity, thereby achieving the effect of recovering the excess demolding agent.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A demoulding device based on lightweight plastic product injection molding, comprising a fixed plate (1), a support plate (2), a fixed mold (3), a hydraulic push rod (4), a movable mold (5) and a connecting rod (21), wherein the connecting rod (21) is movably connected to the movable mold (5), and is characterized in that: The movable mold (5) and the fixed mold (3) are both fixedly connected with a mesh electrode (6) on one side away from each other, and a connection seat (7) is fixedly connected to one side of the mesh electrode (6), and one end of the connection seat (7) is connected in series with a negative high-voltage power supply (8) through a wire. The movable mold (5) and the fixed mold (3) are both fixedly connected with a return frame (9), and a protective sleeve (10) is fixedly connected to the return frame (9). The upper and lower sides of the protective sleeve (10) are evenly fixedly connected with first through holes (11), and the upper end of one of the protective sleeves (10) is fixedly connected with two L-shaped plates (12), and a liquid collecting pipe (13) is fixedly connected between the two L-shaped plates (12). The bottom end of the liquid collecting pipe (13) is evenly fixedly connected with an atomizing nozzle (14), and an ionizer is provided on the bottom side of the atomizing nozzle (14), and the ionizer is connected in series with a positive high-voltage power supply (16) through a wire; A cavity (17) is provided in the fixing plate (1), a bracket is fixedly connected in the cavity (17), a fan (18) is rotatably connected to the bracket, and second through holes (19) are evenly provided at the upper end of the fixing plate (1); A connecting plate (22) is fixedly connected between the two support plates (2), a heat pipe (25) is evenly fixedly connected inside the connecting plate (22), an air pump (23) is fixedly connected to one side of the upper end of the connecting plate (22), an air collecting pipe (24) is fixedly connected to the output end of the air pump (23), and a nozzle is evenly fixedly connected to the bottom end of the air collecting pipe (24).

2. The demoulding device based on lightweight plastic product injection molding according to claim 1 is characterized in that: A buffer sleeve (20) is fixedly connected to one of the protective sleeves (10), and the buffer sleeve (20) corresponds to the output end of the hydraulic push rod (4).

3. The demoulding device based on lightweight plastic product injection molding according to claim 2 is characterized in that: A water pump (15) is arranged on the upper side of one of the protective sleeves (10), the water pump (15) is fixedly connected to the L-shaped plate (12), and the output end of the water pump (15) is communicated with the liquid collecting pipe (13).

4. The demoulding device based on lightweight plastic product injection molding according to claim 3 is characterized in that: A baffle (28) is fixedly connected to the bottom end of one of the protective sleeves (10); the baffle (28) is in contact with the fixed plate (1), and the baffle (28) corresponds to the second through hole (19); the baffle (28) is in an L-shaped structure, and the baffle (28) is movably connected to the support plate (2).

5. The demoulding device based on lightweight plastic product injection molding according to claim 4 is characterized in that: The fixed plate (1) is located in the cavity (17) and is fixedly connected to a liquid collecting plate (29). The liquid collecting plate (29) is evenly provided with third through holes, and an arc-shaped stopper (34) is fixedly connected to the third through hole.

6. The demoulding device based on lightweight plastic product injection molding according to claim 5 is characterized in that: Both sides of the liquid collecting plate (29) are fixedly connected to limiting plates (30), and the limiting plates (30) are fixedly connected to the inner upper side of the fixing plate (1).

7. The demoulding device based on lightweight plastic product injection molding according to claim 6 is characterized in that: Both sides of the upper end of the fixing plate (1) are fixedly connected to vertical plates (32), the vertical plates (32) are fixedly connected to the support plate (2), the fixing plate (1) is provided with a guide groove (33) at the bottom side of the cavity (17), and a guide hole is provided on one side of the fixing plate (1), and the guide hole is communicated with the guide groove (33).

8. The demoulding device based on lightweight plastic product injection molding according to claim 7 is characterized in that: The upper side of the support plate (2) is fixedly connected to a baffle plate (26), and the support plate (2) is located on the lower side of the baffle plate (26) and is fixedly connected to a guide inclined plate (27).

9. The demoulding device based on lightweight plastic product injection molding according to claim 8, characterized in that: A distance sensor (31) is fixedly connected to one side of the support plate (2), and the distance sensor (31) corresponds to the shorter end of the baffle (28).

10. A method for using a demoulding device based on lightweight plastic product injection molding, using the demoulding device based on lightweight plastic product injection molding according to claim 9, characterized in that: The steps include: A1. First, the hydraulic push rod (4) is controlled to extend so that the movable mold (5) gradually moves toward the fixed mold (3). The distance sensor (31) monitors the distance between the baffle plate (28) and the support plate (2), thereby controlling the atomizing nozzle (14) to be located at the center of the movable mold (5) and the fixed mold (3). A2. Then, the negative high-voltage power supply (8) cooperates with the mesh electrode (6) to charge the movable mold (5) and the fixed mold (3) with negative electricity, and then the positive high-voltage power supply (16) charges the mold release agent sprayed by the atomizing nozzle (14) with positive electricity through ionization, so that the mold release agent sprayed by the atomizing nozzle (14) can be evenly applied to the inner cavities of the movable mold (5) and the fixed mold (3); A3. Finally, the excess release agent falls into the cavity (17) of the fixed plate (1) under the pull of gravity and the fan (18), and is blocked by the liquid collecting plate (29) to form condensed liquid, and falls into the guide groove (33), thereby realizing the recovery of the excess release agent.

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