Injection molding device for manufacturing plastic products

Abstract

The injection molding device for plastic product manufacturing comprises a base, and a top frame is arranged at the top of the base. After the lifting mechanism controls the upper mold to descend and be combined with the lower mold, the upper mold and the lower mold continue to press downwards, so that the upper mold and the lower mold integrally overcome the elastic force of the first spring to move downwards, the piston rod drives the piston to move relatively upwards in the piston groove, and the hydraulic pressure in the piston groove and the release agent groove is increased; the mold release agent pushes the telescopic rod to overcome the elastic force of the second spring to move upwards, the telescopic rod drives the atomizing spray head to stretch into the cavity, meanwhile, the mold release agent with increased hydraulic pressure is sprayed out through the atomizing spray head, the atomizing spray head retracts into the mold release agent groove again through the second spring while spraying liquid, and in the mold closing process, the mold release agent can be sprayed out through the second spring. The atomized release agent is automatically sprayed into the cavity, the situation that mold closing is conducted after the release agent is sprayed is avoided, mold closing and spraying of the atomized release agent are conducted synchronously, and then the working efficiency of the injection molding device is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic product production, in particular to an injection molding device for manufacturing plastic products. Background Art

[0002] Plastic products are a general term for daily and industrial products made from plastic as the main raw material, including products made from plastic using all processes such as injection molding and blister molding. In the manufacturing of plastic products, injection molding is the main process, which requires the use of injection molding equipment.

[0003] When using the existing injection molding device for manufacturing plastic products, in order to facilitate demolding, it is necessary to apply a mold release agent in the mold cavity before injection molding. The existing mold release agent application methods are divided into two types: manual application and nozzle atomization spraying. Manual application is time-consuming and labor-intensive. Although the nozzle atomization spraying can automatically apply the mold release agent, it is necessary to extend the nozzle into the mold cavity for spraying before mold closing. The mold can only be closed after the spraying is completed. It is impossible to automatically spray the mold release agent on the mold cavity while the mold is closing. This makes the existing injection molding device low in efficiency and inconvenient to use. Therefore, we propose an injection molding device for manufacturing plastic products to solve the problems raised. Summary of the invention

[0004] The object of the present invention is to provide an injection molding device for manufacturing plastic products, which can automatically spray atomized mold release agent into the mold cavity during the mold closing process, avoid spraying the mold release agent before mold closing, and make the mold closing and spraying the atomized mold release agent be carried out simultaneously, thereby effectively improving the working efficiency of the injection molding device.

[0005] To achieve the above object, the present invention provides the following technical solution: an injection molding device for manufacturing plastic products, comprising a base, a top frame is arranged on the top of the base, and the base and the top frame are fixedly connected on both sides by support rods, wherein:

[0006] A lower die is arranged on the base, an upper die is arranged below the top frame, the upper die is lifted and lowered by a lifting mechanism, guide frames are symmetrically and fixedly connected on both sides of the lower die, the guide frames are sleeved on the support rods through support rod grooves, a first spring is sleeved on the support rods between the top of the base and the guide frame, a cavity is arranged on the top of the lower die, a piston groove is arranged inside the lower die corresponding to the cavity, a piston is arranged in the piston groove, and a piston rod is fixedly connected to the bottom of the piston;

[0007] The bottom end of the piston rod passes through the interior of the lower mold and is fixedly connected to the base, the lower mold is provided with release agent grooves on both sides near the piston groove, the piston groove is connected to the release agent groove through a connecting groove, a telescopic rod is arranged in the release agent groove, the top of the release agent groove is connected to the cavity through a baffle groove, a baffle is fixedly connected to the end of the telescopic rod corresponding to the baffle groove, atomizing nozzles are symmetrically installed on both sides of the telescopic rod near the top, the bottom of the telescopic rod corresponding to the atomizing nozzle is connected to a liquid inlet groove, and a feeding hose is connected to one side of the lower mold near the top of the piston groove;

[0008] A one-way valve is installed inside the feed hose near the piston groove, a connecting rod groove is opened at the bottom of the lower mold corresponding to the release agent groove, a connecting rod is fixedly connected to the bottom of the telescopic rod corresponding to the connecting rod groove, the bottom end of the connecting rod located on the outer side of the lower mold is rotatably connected to a spring plate, a second spring is sleeved on the connecting rod between the spring plate and the lower mold, and the telescopic rod is rotated by a transmission mechanism when it is lifted or lowered.

[0009] Preferably, the lifting mechanism includes guide grooves, guide grooves are opened at the tops of the four corners of the upper mold corresponding to the top of the upper mold, guide rods are fixedly connected to the tops of the upper mold corresponding to the guide grooves, a rotating block is rotatably connected to the middle of the top frame, a screw rod is threadedly connected to the middle of the rotating block, the bottom end of the screw rod is fixedly connected to the upper mold, a first reversing gear is fixedly connected to the top of the rotating block, a motor is installed on the top of one side of the top frame, and a second reversing gear is fixedly connected to the shaft end of the motor corresponding to the first reversing gear.

[0010] Preferably, the guide rod is in the shape of a rectangular column, and the guide rod and the guide groove constitute a guide structure.

[0011] Preferably, the first reversing gear and the second reversing gear are perpendicular to each other, and the first reversing gear is meshed with the second reversing gear.

[0012] Preferably, a first sealing ring is sleeved on the outer side of the telescopic rod near the bottom, and the telescopic rod is sealed and connected to the inner wall of the release agent groove through the first sealing ring.

[0013] Preferably, the baffle is a cylinder, and the outer dimensions of the baffle match the inner dimensions of the baffle groove.

[0014] Preferably, the one-way valve allows one-way flow from the feed hose to the piston groove.

[0015] Preferably, the transmission mechanism includes a transmission groove, the connecting rod is provided with a transmission groove on the outer side near the bottom, a transmission block is fixedly connected to the inner wall of the connecting rod groove corresponding to the transmission groove, and a notch groove is penetrated at the position of the base corresponding to the spring plate.

[0016] Preferably, the transmission groove is spiral-shaped, and the inner dimension of the transmission groove matches the outer dimension of the transmission block.

[0017] Preferably, the size of the spring plate is smaller than the inner size of the notch groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, the lower mold is supported by the first spring so that there is a distance between it and the base. After the lifting mechanism controls the upper mold to descend and close the mold with the lower mold, it continues to press down, so that the upper mold and the lower mold as a whole overcome the elastic force of the first spring and move downward, so that the piston rod drives the piston to move relatively upward in the piston groove, so that the hydraulic pressure in the piston groove and the mold release agent groove increases, so that the mold release agent pushes the telescopic rod to overcome the elastic force of the second spring and move upward, so that the telescopic rod drives the atomizing nozzle to extend into the mold cavity, and at the same time, the hydraulically increased mold release agent is sprayed out through the atomizing nozzle, and the atomizing nozzle is retracted into the inside of the mold release agent groove while spraying the liquid through the second spring, so that in the process of mold closing, the atomized mold release agent is automatically sprayed into the mold cavity, so as to avoid spraying the mold release agent first and then closing the mold, so that the mold closing and spraying the atomized mold release agent are carried out simultaneously, thereby effectively improving the working efficiency of the injection molding device.

[0020] 2. In the present invention, when the telescopic rod drives the atomizing nozzle to extend or retract into the release agent groove, the telescopic rod drives the connecting rod to rise and fall in the connecting rod groove. When the connecting rod moves, it moves relative to the transmission block. The transmission block drives the connecting rod to rotate through the spiral transmission groove, thereby driving the telescopic rod to rotate itself when it is lifted and lowered. As a result, when the atomizing nozzle sprays the release agent in the cavity, the telescopic rod drives the atomizing nozzle to rotate, and the release agent can be evenly sprayed on the inner wall of the cavity, thereby effectively improving the spraying effect of the release agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the telescopic rod of the present invention;

[0024] Figure 4 The schematic diagram of the cross-sectional structure of the lower mold of the present invention is shown in FIG.

[0025] Figure 5 For the present invention Figure 2 Schematic diagram of the local enlarged structure at A in the middle

[0026] Figure 6 For the present invention Figure 2 Schematic diagram of the local enlarged structure at B in the middle

[0027] In the figure: 1, base; 2, top frame; 3, support rod; 4, lower mold; 5, upper mold; 6, guide groove; 7, guide rod; 8, rotating block; 9, screw; 10, first reversing gear; 11, motor; 12, second reversing gear; 13, guide frame; 14, support rod groove; 15, first spring; 16, cavity; 17, piston groove; 18, piston; 19, piston rod; 20, release agent groove; 21, connecting groove; 22, telescopic rod; 23, first sealing ring; 24, baffle groove; 25, baffle; 26, atomizing nozzle; 27, liquid inlet groove; 28, feed hose; 29, one-way valve; 30, connecting rod groove; 31, connecting rod; 32, spring plate; 33, second spring; 34, second sealing ring; 35, transmission groove; 36, transmission block; 37, notch groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe 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] Example:

[0030] See also Figures 1 to 6 The present invention provides a technical solution: an injection molding device for manufacturing plastic products, comprising a base 1, a top frame 2 is arranged on the top of the base 1, and the base 1 and the top frame 2 are fixedly connected on both sides by support rods 3, wherein:

[0031] A lower die 4 is arranged on the base 1, an upper die 5 is arranged below the top frame 2, and the upper die 5 is controlled to be lifted and lowered by a lifting mechanism, and guide frames 13 are symmetrically fixedly connected to both sides of the lower die 4, and the guide frames 13 are sleeved on the support rods 3 through support rod grooves 14, and a first spring 15 is sleeved on the support rods 3 between the top of the base 1 and the guide frames 13, and a cavity 16 is opened at the top of the lower die 4, and a piston groove 17 is opened inside the lower die 4 corresponding to the cavity 16, and a piston 18 is arranged in the piston groove 17, and a piston rod 19 is fixedly connected to the bottom of the piston 18;

[0032] The bottom end of the piston rod 19 passes through the interior of the lower mold 4 and is fixedly connected to the base 1. The lower mold 4 is provided with release agent grooves 20 on both sides near the piston groove 17. The piston groove 17 is connected to the release agent groove 20 through a connecting groove 21. A telescopic rod 22 is arranged in the release agent groove 20. The top of the release agent groove 20 is connected to the cavity 16 through a baffle groove 24. The end of the telescopic rod 22 corresponding to the baffle groove 24 is fixedly connected with a baffle 25. Atomizing nozzles 26 are symmetrically installed on both sides of the telescopic rod 22 near the top. The bottom of the telescopic rod 22 corresponding to the atomizing nozzle 26 is connected with a liquid inlet groove 27. A feeding hose 28 is connected to one side of the lower mold 4 near the top of the piston groove 17.

[0033] A one-way valve 29 is installed inside the feed hose 28 near the piston groove 17. A connecting rod groove 30 is opened at the bottom of the lower mold 4 corresponding to the release agent groove 20. A connecting rod 31 is fixedly connected to the bottom of the telescopic rod 22 corresponding to the connecting rod groove 30. The bottom end of the connecting rod 31 located on the outer side of the lower mold 4 is rotatably connected to a spring plate 32. A second spring 33 is sleeved on the connecting rod 31 between the spring plate 32 and the lower mold 4. The telescopic rod 22 is rotated by the transmission mechanism when it is lifted or lowered.

[0034] The lower mold 4 is supported by the first spring 15 so that there is a distance between it and the base 1. After the lifting mechanism controls the upper mold 5 to descend and close the mold with the lower mold 4, it continues to press down, so that the upper mold 5 and the lower mold 4 as a whole overcome the elastic force of the first spring 15 and move downward, so that the piston rod 19 drives the piston 18 to move relatively upward in the piston groove 17, so that the hydraulic pressure in the piston groove 17 and the release agent groove 20 increases, so that the release agent pushes the telescopic rod 22 to overcome the elastic force of the second spring 33 and move upward, so that the telescopic rod 22 drives the atomizing nozzle 26 to extend into the cavity 16, and at the same time, the hydraulically increased release agent is sprayed out through the atomizing nozzle 26, and the second spring 33 makes the atomizing nozzle 26 retract into the inside of the release agent groove 20 while spraying the liquid, so that in the process of closing the mold, the atomized release agent is automatically sprayed into the cavity 16, so as to avoid spraying the release agent first and then closing the mold, so that closing the mold and spraying the atomized release agent are carried out simultaneously, thereby effectively improving the working efficiency of the injection molding device.

[0035] See also Figures 1 to 6 The lifting mechanism includes a guide groove 6, a guide groove 6 is opened at the top of the top frame 2 corresponding to the four corners of the upper mold 5, a guide rod 7 is fixedly connected to the top of the upper mold 5 corresponding to the guide groove 6, a rotating block 8 is rotatably connected to the middle of the top frame 2, a screw rod 9 is threadedly connected to the middle of the rotating block 8, the bottom end of the screw rod 9 is fixedly connected to the upper mold 5, a first reversing gear 10 is fixedly connected to the top of the rotating block 8, a motor 11 is installed on the top of one side of the top frame 2, and the shaft end of the motor 11 corresponding to the first reversing gear 10 is fixedly connected to the second reversing gear 12, the guide rod 7 is a rectangular column, and the guide rod 7 and the guide groove 6 constitute a guiding structure, the first reversing gear 10 and the second reversing gear 12 are perpendicular to each other, and the first reversing gear 10 is meshed with the second reversing gear 12.

[0036] See also Figures 1 to 6 A first sealing ring 23 is sleeved on the outer side of the telescopic rod 22 near the bottom, and the telescopic rod 22 is sealed and connected to the inner wall of the release agent groove 20 through the first sealing ring 23. The baffle 25 is a cylinder, and the outer size of the baffle 25 is consistent with the inner size of the baffle groove 24. The one-way valve 29 allows one-way flow from the feed hose 28 to the piston groove 17.

[0037] See also Figures 1 to 6 The transmission mechanism includes a transmission groove 35. The outer side of the connecting rod 31 near the bottom is provided with a transmission groove 35. The inner wall of the connecting rod groove 30 corresponding to the transmission groove 35 is fixedly connected with a transmission block 36. The position of the base 1 corresponding to the spring plate 32 is penetrated by a notch groove 37. The transmission groove 35 is spiral, and the internal size of the transmission groove 35 is consistent with the external size of the transmission block 36. The size of the spring plate 32 is smaller than the internal size of the notch groove 37. When the telescopic rod 22 drives the atomizing nozzle 26 to extend or retract into the release agent groove 20, the telescopic rod 22 drives the connecting rod 31 in the connecting rod groove 30. When the connecting rod 31 moves, it moves relative to the transmission block 36. The transmission block 36 drives the connecting rod 31 to rotate through the spiral transmission groove 35, thereby driving the telescopic rod 22 to rotate itself when it is lifted and lowered, so that when the atomizing nozzle 26 sprays the release agent in the cavity 16, the telescopic rod 22 drives the atomizing nozzle 26 to rotate, and the release agent can be evenly sprayed on the inner wall of the cavity 16, thereby effectively improving the spraying effect of the release agent, and through the notch groove 37, the spring plate 32 and the connecting rod 31 are prevented from pressing against the base 1 when they move downward.

[0038] Working principle: In the injection molding device for manufacturing plastic products, the lower mold 4 is supported by the first spring 15 so that it has a distance from the base 1. After the lifting mechanism controls the upper mold 5 to descend and close the mold with the lower mold 4, it continues to press down, so that the upper mold 5 and the lower mold 4 as a whole overcome the elastic force of the first spring 15 and move downward, so that the piston rod 19 drives the piston 18 to move relatively upward in the piston groove 17, so that the hydraulic pressure in the piston groove 17 and the mold release agent groove 20 increases, so that the mold release agent pushes the telescopic rod 22 to overcome the elastic force of the second spring 33 and moves upward, so that the telescopic rod 22 drives the atomizing nozzle 26 to extend into the mold cavity 16, and at the same time, the mold release agent increased by the hydraulic pressure is sprayed out through the atomizing nozzle 26, and the atomizing nozzle 26 is retracted into the mold release agent groove 20 while spraying the liquid through the second spring 33, so that in the process of mold closing, the atomized mold release agent can be automatically sprayed into the mold cavity 16, so as to avoid spraying the mold release agent first and then closing the mold, so that the mold closing and spraying the atomized mold release agent can be carried out synchronously, thereby effectively improving the working efficiency of the injection molding device;

[0039] When the upper mold 5 moves upward and separates from the lower mold 4, the lower mold 4 moves upward through the first spring 15, so that the piston 18 moves relatively downward in the piston groove 17, so that a negative pressure state is generated in the piston groove 17, and then the one-way valve 29 is opened, and the mold release agent is added to the piston groove 17 through the feeding hose 28. The end of the feeding hose 28 is connected to the mold release agent storage tank, so that it can continuously add the mold release agent to the piston groove 17. When the telescopic rod 22 drives the atomizing nozzle 26 to extend or retract into the mold release agent groove 20, the telescopic rod 22 drives the atomizing nozzle 26 to extend or retract into the mold release agent groove 20. The rod 22 drives the connecting rod 31 to rise and fall in the connecting rod groove 30. When the connecting rod 31 moves, it moves relative to the transmission block 36. The transmission block 36 drives the connecting rod 31 to rotate through the spiral transmission groove 35, thereby driving the telescopic rod 22 to rotate itself when it is raised and lowered. When the atomizing nozzle 26 sprays the release agent in the cavity 16, the telescopic rod 22 drives the atomizing nozzle 26 to rotate, and the release agent can be evenly sprayed on the inner wall of the cavity 16, thereby effectively improving the spraying effect of the release agent.

[0040] 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. An injection molding device for manufacturing plastic products, comprising a base (1), characterized in that: A top frame (2) is provided on the top of the base (1), and the base (1) and the top frame (2) are fixedly connected on both sides via support rods (3), wherein: A lower mold (4) is arranged on the base (1), an upper mold (5) is arranged below the top frame (2), the upper mold (5) is controlled to be lifted and lowered by a lifting mechanism, the lower mold (4) is symmetrically fixedly connected with guide frames (13) on both sides, the guide frames (13) are sleeved on the support rods (3) through support rod grooves (14), a first spring (15) is sleeved on the support rods (3) between the top of the base (1) and the guide frames (13), a cavity (16) is provided on the top of the lower mold (4), a piston groove (17) is provided inside the lower mold (4) corresponding to the cavity (16), a piston (18) is provided in the piston groove (17), and a piston rod (19) is fixedly connected to the bottom of the piston (18); The bottom end of the piston rod (19) passes through the interior of the lower mold (4) and is fixedly connected to the base (1); release agent grooves (20) are provided inside the lower mold (4) near both sides of the piston groove (17); the piston groove (17) and the release agent groove (20) are connected through a connecting groove (21); a telescopic rod (22) is provided in the release agent groove (20); the top of the release agent groove (20) is connected to the cavity (16) through a baffle groove (24); a baffle (25) is fixedly connected to the end of the telescopic rod (22) corresponding to the baffle groove (24); atomizing nozzles (26) are symmetrically installed on both sides of the telescopic rod (22) near the top; the bottom of the telescopic rod (22) corresponding to the atomizing nozzle (26) is connected to a liquid inlet groove (27); and a feeding hose (28) is connected to one side of the lower mold (4) near the top of the piston groove (17); A one-way valve (29) is installed inside the feed hose (28) near the piston groove (17); a connecting rod groove (30) is provided at the bottom of the lower mold (4) corresponding to the demoulding agent groove (20); a connecting rod (31) is fixedly connected to the bottom of the telescopic rod (22) corresponding to the connecting rod groove (30); a spring plate (32) is rotatably connected to the bottom end of the connecting rod (31) located outside the lower mold (4); a second spring (33) is sleeved on the connecting rod (31) between the spring plate (32) and the lower mold (4); and the telescopic rod (22) is rotated by a transmission mechanism when it is raised or lowered.

2. The injection molding device for manufacturing plastic products according to claim 1, characterized in that: The lifting mechanism comprises a guide groove (6), the top of the top frame (2) corresponding to the four corners of the upper mold (5) is provided with a guide groove (6), the top of the upper mold (5) corresponding to the guide groove (6) is fixedly connected with a guide rod (7), the middle of the top frame (2) is rotatably connected with a rotating block (8), the middle of the rotating block (8) is threadedly connected with a screw rod (9), the bottom end of the screw rod (9) is fixedly connected to the upper mold (5), the top of the rotating block (8) is fixedly connected with a first reversing gear (10), a motor (11) is installed on the top of one side of the top frame (2), and the shaft end of the motor (11) corresponding to the first reversing gear (10) is fixedly connected with a second reversing gear (12).

3. The injection molding device for manufacturing plastic products according to claim 2, characterized in that: The guide rod (7) is in the shape of a rectangular column, and the guide rod (7) and the guide groove (6) form a guide structure.

4. The injection molding device for manufacturing plastic products according to claim 2, characterized in that: The first reversing gear (10) and the second reversing gear (12) are perpendicular to each other, and the first reversing gear (10) and the second reversing gear (12) are meshed.

5. The injection molding device for manufacturing plastic products according to claim 1, characterized in that: A first sealing ring (23) is sleeved on the outer side of the telescopic rod (22) close to the bottom, and the telescopic rod (22) is sealedly connected to the inner wall of the release agent groove (20) via the first sealing ring (23).

6. The injection molding device for manufacturing plastic products according to claim 1, characterized in that: The baffle plate (25) is a cylinder, and the outer dimensions of the baffle plate (25) match the inner dimensions of the baffle plate groove (24).

7. The injection molding device for manufacturing plastic products according to claim 1, characterized in that: The one-way valve (29) allows one-way flow from the feed hose (28) to the piston groove (17).

8. The injection molding device for manufacturing plastic products according to claim 1, characterized in that: The transmission mechanism comprises a transmission groove (35), the transmission groove (35) is provided on the outer side of the connecting rod (31) near the bottom, a transmission block (36) is fixedly connected to the inner wall of the connecting rod groove (30) corresponding to the transmission groove (35), and a notch groove (37) is penetrated at a position of the base (1) corresponding to the spring plate (32).

9. The injection molding device for manufacturing plastic products according to claim 8, characterized in that: The transmission groove (35) is spiral-shaped, and the internal dimensions of the transmission groove (35) coincide with the external dimensions of the transmission block (36).

10. The injection molding device for manufacturing plastic products according to claim 8, characterized in that: The size of the spring plate (32) is smaller than the inner size of the notch groove (37).

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