A rotary stripping injection mold

Abstract

The present invention discloses a rotary stripping injection mold, which belongs to the field of injection molding. A rotary stripping injection mold comprises an injection molding table, and also comprises: a lower mold fixedly connected to the injection molding table, the inner wall of the lower mold is slidably connected with a stripping plate, and the stripping plate is fitted with the inner wall of the lower mold, and a plurality of coating holes are provided on the outer wall of the stripping plate. The present invention slides upward along the inner surface of the lower mold through the stripping plate, on the one hand, the gas inside the piston cylinder is discharged into the lower mold through the connecting hole, and the gas is discharged through the fitting part of the lower mold and the gear, and on the other hand, the gas inside the fixed sleeve is discharged to the fitting part of the fixed sleeve and the gear through the blowing groove, reducing the air pressure inside the mold, making the air pressure inside the mold less than the external atmospheric pressure, pushing the gear inside the mold to separate from the mold surface, thereby facilitating the demoulding of the gear, and at the same time reducing the physical damage to the gear, maintaining the integrity and precision of the gear.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a rotary stripping injection molding mold. Background Art

[0002] Injection molding, also known as injection molding, is an important plastic processing method. In this process, hot melt plastic is injected into a mold, which is usually a cavity with a specific shape. The plastic cools and solidifies in the mold, and then the mold is opened and the solidified plastic part is taken out. Injection molding technology can produce plastic products of various shapes and sizes, and is widely used in many fields such as automobiles, electronics, home appliances, and medical devices. In the injection molding process, there are several key technical points to consider: Mold design: The design of the mold has an important influence on the quality and molding efficiency of the injection molded parts. The mold needs to have precise dimensions and a good heat dissipation system to ensure that the plastic parts can be accurately molded and cooled quickly. Injection molding machine selection: The selection of the injection molding machine should be determined according to the type of plastic, the complexity of the shape, and the production volume. The correct injection molding machine can ensure the molding quality and efficiency of the plastic parts. Selection of plastic materials: Different plastics have different physical and chemical properties. Choosing the right plastic material is crucial to ensuring the performance of the injection molded parts. Setting of injection molding process parameters: Injection molding process parameters include injection speed, pressure, temperature, etc. The correct setting of these parameters can improve product quality and reduce defects.

[0003] At present, when gears are produced by injection molding, it is necessary to manually apply a release agent into the mold. However, due to the presence of gear teeth, the release agent cannot be evenly applied to the corners, causing the molded gears to adhere to the mold and be difficult to remove. Based on this, a rotary stripping injection mold is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, a release agent needs to be manually applied into the mold. However, due to the presence of gear teeth, the release agent cannot be evenly applied to the corners, resulting in the molded gears adhering to the mold and being difficult to remove. A rotary demolding injection mold is proposed to solve the problem.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A rotary stripping injection mold comprises an injection molding table, and also comprises: a lower mold fixedly connected to the injection molding table, the inner wall of the lower mold being slidably connected to a stripping plate, and the stripping plate is fitted with the inner wall of the lower mold, a plurality of coating holes are provided on the outer wall of the stripping plate, and when the stripping plate slides downward along the inner wall of the lower mold, a release agent is coated on the inner wall of the lower mold through the plurality of coating holes; a fixed sleeve fixedly connected to the top of the stripping plate, the inner wall of the fixed sleeve being slidably connected to a piston plate, wherein a blowing groove is provided on the stripping plate, and the air inlet end of the blowing groove is located inside the fixed sleeve, and the blowing end of the blowing groove is located outside the fixed sleeve and fits with the outer wall of the fixed sleeve.

[0007] In order to allow the four molds to rotate and remove materials simultaneously, preferably, a servo motor is also included which is installed at the bottom of the injection molding table. The output end of the servo motor is fixedly connected to a rotating shaft, the bottom of the rotating shaft is fixedly connected to a driving wheel, and the outer wall of the driving wheel is fitted with a belt.

[0008] In order to facilitate rotary stripping, it further includes a lifting screw connected to the stripping plate by a thread, and a driven wheel is fixedly connected to the bottom of the lifting screw, wherein the driven wheel is adapted to the belt, and the piston plate is installed on the top of the lifting screw.

[0009] In order to blow air toward the edge of the mold and the gear during stripping, and to apply a release agent to the edge of the mold during injection molding, it is preferably further included a piston cylinder fixedly connected to the bottom of the lower mold, a piston rod is slidably connected to the interior of the piston cylinder, and the piston rod is configured to be hollow, wherein a coating groove is provided in the stripping plate, and the coating groove is connected to the piston rod and the coating hole.

[0010] Furthermore, a communicating hole is provided at the top of the piston cylinder, and the piston rod passes through the communicating hole.

[0011] In order to facilitate the cooling of the injection molded gears and the heating of the release agent to improve the fluidity of the release agent, it further includes a water inlet pipe fixedly connected to the outer wall of the lower mold, a water cooling groove is opened in the side wall of the lower mold, and a connecting pipe is fixedly connected to the bottom of the lower mold. The connecting pipe is connected to the water cooling groove, and the end of the connecting pipe away from the lower mold is fixedly connected to a heat exchange pipe, and the end of the heat exchange pipe away from the connecting pipe is fixedly connected to a drain pipe, and the heat exchange pipe is sleeved on the outside of the piston cylinder.

[0012] Furthermore, it also includes a lifting cylinder installed on the top of the injection molding table, the output end of the lifting cylinder is fixedly connected to the upper mold, the top of the lifting cylinder is fixedly connected to the injection molding equipment, the side wall of the injection molding equipment is fixedly connected to the injection tube, the end of the injection tube away from the injection molding equipment is fixedly connected to the upper mold, and the upper mold is adapted to the lower mold, and the outer side wall of the fixed sleeve is slidably connected to the upper mold and fits each other.

[0013] In order to facilitate the coating of the release agent on the outer surface of the fixed sleeve, it further includes a plug-in tube fixedly connected to the bottom of the upper mold, the top of the plug-in tube is fixedly connected with a connecting groove, the end of the connecting groove away from the plug-in tube is fixedly connected with a spray groove, the spray groove is provided with a spray hole, and the spray hole is arranged at the position where the upper mold and the fixed sleeve are in contact, wherein the top of the lower mold is provided with a plug-in hole, and the plug-in hole is adapted to the plug-in tube.

[0014] Furthermore, an injection tube is fixedly connected inside the lower mold, and the injection tube is located in the water cooling tank. One end of the injection tube is fixedly connected to the bottom of the piston cylinder, and the other end is connected to the plug hole.

[0015] Furthermore, a liquid adding tube is fixedly connected to the top of the injection molding table, a reagent storage box is fixedly connected to the bottom of the injection molding table, and the reagent storage box is communicated with the liquid adding tube, an air inlet hole is opened inside the fixed sleeve on the stripping plate, a reagent extraction tube is fixedly connected to the bottom of the reagent storage box, and one end of the reagent extraction tube away from the reagent storage box is fixedly connected to the piston cylinder.

[0016] Compared with the prior art, the present invention provides a rotary stripping injection mold, which has the following beneficial effects:

[0017] 1. The rotary stripping injection mold slides upward along the inner surface of the lower mold through the stripping plate. On the one hand, the gas inside the piston cylinder is discharged into the lower mold through the connecting hole, and the gas is discharged through the fitting part of the lower mold and the gear. On the other hand, the gas inside the fixed sleeve is discharged to the fitting part of the fixed sleeve and the gear through the blowing groove, thereby reducing the air pressure inside the mold, making the air pressure inside the mold less than the external atmospheric pressure, pushing the gear in the mold to separate from the mold surface, thereby facilitating the demoulding of the gear and reducing the physical damage to the gear at the same time, maintaining the integrity and precision of the gear, and utilizing the upward sliding and blowing action of the stripping plate to enable the stripping plate to scrape the raw material adhering to the mold from the mold, and the gas can blow out the scraped raw material, thereby ensuring the neatness and smoothness of the mold and improving the quality of the gear obtained by injection molding.

[0018] 2. The rotary stripping injection mold slides downwardly through the stripping plate. During the gear injection molding process, the piston cylinder extracts the air in the mold through the connecting hole due to the downward sliding of the stripping plate, thereby reducing the bubble content inside the injection-molded gear and improving the hardness of the gear. In this process, the release agent will be sprayed on the inner wall of the lower mold and the outer surface of the fixed sleeve through the coating hole and the spray hole, which helps to quickly demold the gear obtained by injection molding and reduces the probability of adhesion between the gear and the mold, thereby improving the demolding efficiency.

[0019] 3. The rotary demolding injection mold uses cooling water circulating in the water cooling tank, so that when the cooling water cools the gear, the temperature of the gear can heat the cooling water. When the cooling water flows through the heat exchange tube, it will heat the release agent inside the piston cylinder, thereby improving the fluidity of the release agent, helping to prevent the resin or other materials from adhering to the inner surface of the mold, thereby ensuring the surface quality of the product, and with the increase of temperature, the lubricity of the release agent usually increases, which means that the impact force of the gear on the mold during the demolding process will be reduced, reducing the wear of the mold and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a rotary stripping injection mold proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the front middle section structure of a rotary stripping injection mold proposed by the present invention;

[0022] Figure 3 A rotary stripping injection mold proposed by the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 A rotary stripping injection mold proposed by the present invention Figure 2 The enlarged structural diagram at B in the middle;

[0024] Figure 5 A schematic diagram of the three-dimensional structure of a stripping plate of a rotary stripping injection mold proposed by the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the bottom of a rotary stripping injection mold proposed by the present invention;

[0026] Figure 7 This is a schematic diagram of the side cross-section structure of a rotary stripping injection mold proposed by the present invention;

[0027] Figure 8 The present invention provides a schematic diagram of a three-dimensional partially cutaway structure of a rotary stripping injection mold.

[0028] In the figure: 1. injection molding table; 2. lower mold; 3. lifting cylinder; 4. upper mold; 5. injection molding equipment; 6. injection pipe; 7. water inlet pipe; 8. heat exchange pipe; 9. drainage pipe; 10. liquid adding pipe; 11. agent storage box; 12. servo motor; 13. rotating shaft; 14. driving wheel; 15. belt; 16. driven wheel; 17. lifting screw; 18. plug-in hole; 19. plug-in tube; 20. connecting groove; 21. spray groove; 22. spray hole; 23. stripping plate; 24. fixing sleeve; 25. air inlet hole; 26. blowing groove; 27. piston plate; 28. extraction pipe; 29. ​​piston cylinder; 30. piston rod; 31. connecting hole; 32. coating groove; 33. injection pipe; 34. water cooling groove; 35. connecting pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0031] Example:

[0032] Reference Figure 1-Figure 3 , Figure 7 , Figure 8 A rotary stripping injection mold comprises an injection molding table 1, and also comprises: a lower mold 2 fixedly connected to the injection molding table 1, and also comprises a lifting cylinder 3 installed on the top of the injection molding table 1, the output end of the lifting cylinder 3 is fixedly connected to an upper mold 4, the top of the lifting cylinder 3 is fixedly connected to an injection molding device 5, and the side wall of the injection molding device 5 is fixedly connected to an injection pipe 6, and the end of the injection pipe 6 away from the injection molding device 5 is fixedly connected to the upper mold 4, and the upper mold 4 is adapted to the lower mold 2, and the outer side wall of the fixed sleeve 24 is slidably connected to the upper mold 4, and They fit each other and also include a plug-in tube 19 fixedly connected to the bottom of the upper mold 4, the top of the plug-in tube 19 is fixedly connected with a connecting groove 20, the end of the connecting groove 20 away from the plug-in tube 19 is fixedly connected with a spray groove 21, and the spray groove 21 is provided with a spray hole 22, wherein a plug-in hole 18 is provided on the top of the lower mold 2, the plug-in hole 18 is adapted to the plug-in tube 19, a liquid adding tube 10 is fixedly connected to the top of the injection molding table 1, and a storage box 11 is fixedly connected to the bottom of the injection molding table 1, and the storage box 11 is communicated with the liquid adding tube 10.

[0033] When the gear is injection molded, sufficient release agent is added to the agent storage box 11 through the liquid adding pipe 10. First, the raw material for injection molding the gear is added to the injection molding equipment 5, and the injection molding equipment 5 heats and melts the raw material. Then, the lifting cylinder 3 is started to assemble the upper mold 4 and the lower mold 2 with each other, and the plug tube 19 is inserted into the plug hole 18. Then, the injection molding equipment 5 can be started to inject the raw material for injection molding the gear into the mold through the injection pipe 6.

[0034] Reference Figure 2 , Figure 4-Figure 8 The inner wall of the lower mold 2 is slidably connected with a stripping plate 23, and the stripping plate 23 is in close contact with the inner wall of the lower mold 2. A plurality of coating holes are provided on the outer wall of the stripping plate 23. When the stripping plate 23 slides downward along the inner wall of the lower mold 2, a release agent is coated on the inner wall of the lower mold 2 through the plurality of coating holes. A fixed sleeve 24 is fixedly connected to the top of the stripping plate 23, and a piston plate 27 is slidably connected to the inner wall of the fixed sleeve 24, wherein a blowing groove 26 is provided on the stripping plate 23, and the air inlet end of the blowing groove 26 is located inside the fixed sleeve 24, a one-way valve is provided in the blowing groove 26 so that the air inside the fixed sleeve 24 can only be discharged through the blowing groove 26, and the blowing end of the blowing groove 26 is located outside the fixed sleeve 24 and in close contact with the outer wall of the fixed sleeve 24 The stripping plate 23 is provided with an air inlet 25 located inside the fixed sleeve 24, and a one-way valve is arranged in the air inlet 25, so that the fixed sleeve 24 can only draw outside air through the air inlet 25, and the spray hole 22 is arranged at the position where the upper mold 4 and the fixed sleeve 24 are in contact with each other. It also includes a servo motor 12 installed at the bottom of the injection molding table 1, and the output end of the servo motor 12 is fixedly connected to the rotating shaft 13, and the bottom of the rotating shaft 13 is fixedly connected to the driving wheel 14, and the outer wall of the driving wheel 14 is in contact with the belt 15. It also includes a lifting screw 17 connected to the stripping plate 23 by a thread, and the bottom of the lifting screw 17 is fixedly connected to the driven wheel 16, wherein the driven wheel 16 is adapted to the belt 15, and the piston plate 27 is installed on the top of the lifting screw 17.

[0035] During injection molding, before the upper mold 4 and the lower mold 2 are assembled, the servo motor 12 is started to make the rotating shaft 13 drive the driving wheel 14 to rotate. The rotation of the driving wheel 14 will drive the four driven wheels 16 to rotate through the belt 15, thereby rotating the lifting screw 17. The rotation of the lifting screw 17 will make the stripping plate 23 slide upward along the inner wall of the lower mold 2 until it slides to the top of the lower mold 2. In this process, when the stripping plate 23 slides upward, the piston plate 27 will slide downward relative to the fixed sleeve 24, so that the air inside the fixed sleeve 24 is blown to the fixed sleeve through the blowing groove 26 under the action of the piston plate 27. The fitting part between the stripper plate 24 and the gear obtained by injection molding realizes the cleaning effect on the outer surface of the fixing sleeve 24, and prevents the outer surface of the fixing sleeve 24 from being dusty and affecting the precision of the injection molded gear; and in this process, the upward sliding of the stripper plate 23 will also cause the piston rod 30 to slide upward along the inside of the piston cylinder 29, so that the air inside the piston cylinder 29 is discharged into the lower mold 2 through the connecting hole 31, and discharged through the fitting part between the lower mold 2 and the gear obtained by injection molding, and the stripper plate 23 can scrape the raw material adhering to the lower mold 2 from the lower mold 2 by using the upward sliding of the stripper plate 23 and the blowing effect, and the gas can blow the scraped raw material out , thereby ensuring the neatness and smoothness of the lower mold 2, thereby improving the quality of the gear obtained by subsequent injection molding; at the same time, the upward sliding of the piston rod 30 will cause the piston cylinder 29 to extract the demoulding agent inside the storage box 11 through the agent extraction tube 28 and enter the piston cylinder 29 until the demoulding plate 23 slides to the top of the lower mold 2, and then the lifting cylinder 3 can be started to assemble the upper mold 4 with the lower mold 2. At this time, the demoulding plate 23 is located at the top of the lower mold 2 and fits with the upper mold 4, and the fixing sleeve 24 extends out of the upper mold 4. The servo motor 12 is started while the injection tube 6 is injecting, so that the servo motor 12 rotates forward, thereby driving the rotating shaft 13 to rotate, so that The driving wheel 14 rotates, and the rotation of the driving wheel 14 will drive the four driven wheels 16 to rotate through the belt 15, thereby rotating the lifting screw 17. The rotation of the lifting screw 17 will cause the stripping plate 23 to slide downward along the inner wall of the lower mold 2 until it slides to the bottom of the lower mold 2. During the downward sliding of the stripping plate 23, the piston plate 27 will slide upward along the inner wall of the fixed sleeve 24 relative to the fixed sleeve 24, thereby drawing outside air into the fixed sleeve 24 through the air inlet 25, cooling the fixed sleeve 24, thereby cooling the injection molding material attached to the fixed sleeve 24, so that the injection molding material can be quickly cooled and solidified;

[0036] The gradual injection molding process of the gear is realized, and the air in the mold is reduced during the gear injection molding process, thereby reducing the bubbles in the produced gear, improving the overall strength of the gear, and making the produced gear meet the production standards.

[0037] Reference Figure 2-Figure 8, also includes a piston cylinder 29 fixedly connected to the bottom of the lower mold 2, the piston cylinder 29 is slidably connected with a piston rod 30 inside, and the piston rod 30 is set to be hollow, a one-way valve is arranged in the piston rod 30 so that the demoulding agent can only flow from bottom to top when passing through the piston rod 30, wherein a coating groove 32 is provided in the demoulding plate 23, and the coating groove 32 is connected with the piston rod 30 and the coating hole, a connecting hole 31 is provided on the top of the piston cylinder 29, and the piston rod 30 passes through the connecting hole 31, an injection tube 33 is fixedly connected in the lower mold 2, and a one-way valve is arranged in the injection tube 33 so that the demoulding agent in the injection tube 33 can only flow into the plug hole 18, and the injection tube 33 is located in the water cooling groove 34, one end of the injection tube 33 is fixedly connected to the bottom of the piston cylinder 29, and the other end is connected to the plug hole 18, a pumping tube 28 is fixedly connected to the bottom of the storage box 11, and the end of the pumping tube 28 away from the storage box 11 is fixedly connected to the piston cylinder 29.

[0038] As the demolding plate 23 slides downward, the piston rod 30 will be pushed to slide downward along the inside of the piston cylinder 29. During the downward sliding of the piston rod 30, the air inside the lower mold 2 will be drawn into the piston cylinder 29 through the connecting hole 31, and part of the demolding agent in the piston cylinder 29 will enter the coating groove 32 through the piston rod 30, and the other part will enter the spraying groove 21 through the injection tube 33 and the plug hole 18, the plug tube 19, and the connecting groove 20. The demolding agent entering the coating groove 32 will be coated on the inner surface of the lower mold 2 through the coating hole, and the demolding agent entering the spraying groove 21 will be sprayed on the inner surface of the fixed sleeve 24 through the spraying hole 22, so that the demolding agent is sprayed into the mold during the injection molding process.

[0039] The fluidity of the mold release agent is improved, and the mold release agent is prevented from being sprayed in advance. The solidification of the mold release agent causes the fluidity of the mold release agent to deteriorate, so that the mold release agent cannot penetrate into the tiny gap between the mold and the injection molded gear, causing the injection molded gear to adhere to the mold and be difficult to remove, thereby facilitating the subsequent rapid removal operation. At the same time, the mold release agent can form a uniform lubricating film before the plastic is cooled and solidified. This film can reduce the adhesion between the plastic and the lower mold 2, so that the plastic part will not adhere to the lower mold 2 during demolding. Since the mold release agent reduces the friction between the plastic and the lower mold 2, the demolding is smoother and reduced. The time required for downtime cleaning and repairing due to sticking of the lower mold 2 or damage of the plastic parts is reduced, thereby improving production efficiency. The release agent can lubricate the surface of the lower mold 2, reduce the impact and wear on the surface of the lower mold 2 when the plastic parts are demolded, and extend the service life of the lower mold 2. After applying the release agent, a product with better surface quality can be obtained because it reduces the adhesion and possible scratches of the plastic parts on the lower mold 2, thereby avoiding surface defects and providing a good demolding effect. A good demolding effect can reduce waste caused by sticking of the lower mold 2 or deformation of the plastic parts, thereby reducing production costs.

[0040] Reference Figure 1 , Figure 2 , Figure 5-Figure 8 , and also includes a water inlet pipe 7 fixedly connected to the outer wall of the lower mold 2, a water cooling groove 34 is opened in the side wall of the lower mold 2, a connecting pipe 35 is fixedly connected to the bottom of the lower mold 2, the connecting pipe 35 is connected to the water cooling groove 34, the end of the connecting pipe 35 away from the lower mold 2 is fixedly connected to a heat exchange pipe 8, the end of the heat exchange pipe 8 away from the connecting pipe 35 is fixedly connected to a drain pipe 9, and the heat exchange pipe 8 is sleeved on the outside of the piston cylinder 29.

[0041] After the injection molding is completed, the molded gear needs to be cooled down. At this time, cooling water enters through the water inlet pipe 7, and the cooling water will enter the water cooling tank 34 to cool the molded gear. The water at the absorption temperature will enter the heat exchange pipe 8 through the connecting pipe 35. At this time, since the heat exchange pipe 8 is sleeved on the outside of the piston cylinder 29, the water at the absorption temperature will heat the piston cylinder 29. Finally, the cooling water at the absorption temperature is discharged through the drain pipe 9.

[0042] The mold release agent that subsequently passes through the extraction tube 28 and enters the piston cylinder 29 can be heated, thereby improving the fluidity of the mold release agent and helping to prevent the resin or other materials from adhering to the inner surface of the mold, thereby ensuring the surface quality of the product. In addition, as the temperature increases, the lubricity of the mold release agent usually increases, which means that the impact force of the gear on the mold during the demolding process will be reduced, reducing the wear of the mold and extending its service life.

[0043] The working principle of the present invention during stripping is as follows:

[0044] When stripping, first start the lifting cylinder 3 to separate the upper mold 4 from the lower mold 2 and fully extend the lifting cylinder 3, then start the servo motor 12 to reverse the servo motor 12, and then make the four lifting screws 17 rotate synchronously through the driving wheel 14, the belt 15 and the driven wheel 16. The rotation of the lifting screws 17 will make the stripping plate 23 slide upward along the inner surface of the lower mold 2;

[0045] When the stripping plate 23 slides upward, the piston plate 27 will slide downward relative to the fixing sleeve 24, so that the air inside the fixing sleeve 24 is blown toward the fitting part between the fixing sleeve 24 and the injection-molded gear through the blowing groove 26 under the action of the piston plate 27, thereby achieving the stripping effect of the fixing sleeve 24 and the injection-molded gear, thereby facilitating the subsequent removal of the injection-molded gear from the stripping plate 23;

[0046] In this process, the upward sliding of the stripper plate 23 will also cause the piston rod 30 to slide upward along the inside of the piston cylinder 29, so that the air inside the piston cylinder 29 is discharged into the lower mold 2 through the connecting hole 31, and discharged through the fitting part between the lower mold 2 and the gear obtained by injection molding, which can reduce the air pressure inside the lower mold 2, so that the air pressure inside the lower mold 2 is less than the external atmospheric pressure, and the gear in the lower mold 2 is pushed to separate from the surface of the lower mold 2, thereby facilitating the demoulding of the gear, and at the same time can reduce the physical damage to the gear, maintain the integrity and accuracy of the gear, and utilize the upward sliding and blowing effect of the stripper plate 23 to enable the stripper plate 23 to scrape the raw material adhered to the lower mold 2 from the lower mold 2, and the gas can blow out the scraped raw material, thereby ensuring the neatness and smoothness of the lower mold 2 and improving the quality of the gear obtained by injection molding;

[0047] At the same time, the upward sliding of the piston rod 30 will cause the piston cylinder 29 to extract the release agent inside the agent storage box 11 through the extraction tube 28 and enter the piston cylinder 29 until the stripping plate 23 slides to the top of the lower mold 2. Then the molded gear can be removed from the stripping plate 23 and the fixing sleeve 24. Since the mold is used to integrally inject the gear through the lower mold 2, the upper mold 4 only provides a sealing function. Therefore, compared with the spliced ​​mold, the probability of burrs on the injection molded gear can be reduced, thereby improving the production efficiency of the gear.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rotary stripping injection mold, comprising an injection molding table (1), characterized in that: Also includes: A lower mold (2) is fixedly connected to the injection molding table (1), the inner wall of the lower mold (2) is slidably connected to a stripper plate (23), and the stripper plate (23) fits the inner wall of the lower mold (2), and a plurality of coating holes are provided on the outer wall of the stripper plate (23), and when the stripper plate (23) slides downward along the inner wall of the lower mold (2), a release agent is coated on the inner wall of the lower mold (2) through the plurality of coating holes; A fixed sleeve (24) is fixedly connected to the top of the stripping plate (23), and a piston plate (27) is slidably connected to the inner wall of the fixed sleeve (24). The stripping plate (23) is provided with an air blowing groove (26), and an air inlet end of the air blowing groove (26) is located inside the fixing sleeve (24), and an air blowing end of the air blowing groove (26) is located outside the fixing sleeve (24) and fits with an outer wall of the fixing sleeve (24); It also includes a piston cylinder (29) fixedly connected to the bottom of the lower mold (2), the piston cylinder (29) is slidably connected to a piston rod (30) inside, and the piston rod (30) is arranged in a hollow form, wherein a coating groove (32) is provided in the stripping plate (23), and the coating groove (32) is connected to the piston rod (30) and the coating hole; It also includes a water inlet pipe (7) fixedly connected to the outer wall of the lower mold (2), a water cooling groove (34) is provided in the side wall of the lower mold (2), a connecting pipe (35) is fixedly connected to the bottom of the lower mold (2), the connecting pipe (35) is communicated with the water cooling groove (34), one end of the connecting pipe (35) away from the lower mold (2) is fixedly connected to a heat exchange pipe (8), one end of the heat exchange pipe (8) away from the connecting pipe (35) is fixedly connected to a drain pipe (9), and the heat exchange pipe (8) is sleeved on the outside of the piston cylinder (29).

2. A rotary stripping injection mold according to claim 1, characterized in that: It also includes a servo motor (12) installed at the bottom of the injection molding table (1), the output end of the servo motor (12) is fixedly connected to a rotating shaft (13), the bottom of the rotating shaft (13) is fixedly connected to a driving wheel (14), and the outer wall of the driving wheel (14) is attached to a belt (15).

3. A rotary stripping injection mold according to claim 2, characterized in that: It also includes a lifting screw (17) connected to the stripping plate (23) via a thread, wherein the bottom of the lifting screw (17) is fixedly connected to a driven wheel (16). The driven wheel (16) is adapted to the belt (15), and the piston plate (27) is mounted on the top of the lifting screw (17).

4. A rotary stripping injection mold according to claim 1, characterized in that: A communicating hole (31) is formed at the top of the piston cylinder (29), and the piston rod (30) passes through the communicating hole (31).

5. The rotary stripping injection mold according to claim 1, characterized in that: It also includes a lifting cylinder (3) installed on the top of the injection molding table (1), the output end of the lifting cylinder (3) is fixedly connected to the upper mold (4), the top of the lifting cylinder (3) is fixedly connected to the injection molding device (5), the side wall of the injection molding device (5) is fixedly connected to the injection pipe (6), the end of the injection pipe (6) away from the injection molding device (5) is fixedly connected to the upper mold (4), and the upper mold (4) is adapted to the lower mold (2), and the outer side wall of the fixed sleeve (24) is slidably connected to the upper mold (4) and fits each other.

6. A rotary stripping injection mold according to claim 5, characterized in that: It also includes a plug-in tube (19) fixedly connected to the bottom of the upper mold (4), the top of the plug-in tube (19) is fixedly connected to a connecting groove (20), the end of the connecting groove (20) away from the plug-in tube (19) is fixedly connected to a spraying groove (21), the spraying groove (21) is provided with a spraying hole (22), and the spraying hole (22) is arranged at a position where the upper mold (4) and the fixed sleeve (24) are in contact with each other. The top of the lower mold (2) is provided with a plug hole (18), and the plug hole (18) is compatible with the plug tube (19).

7. A rotary stripping injection mold according to claim 6, characterized in that: An injection pipe (33) is fixedly connected to the lower mold (2), and the injection pipe (33) is located in the water cooling tank (34). One end of the injection pipe (33) is fixedly connected to the bottom of the piston cylinder (29), and the other end is connected to the plug hole (18).

8. The rotary stripping injection mold according to claim 1, characterized in that: The top of the injection molding table (1) is fixedly connected to a liquid adding pipe (10), the bottom of the injection molding table (1) is fixedly connected to a reagent storage box (11), and the reagent storage box (11) is communicated with the liquid adding pipe (10), an air inlet hole (25) is provided inside the fixed sleeve (24) on the stripping plate (23), the bottom of the reagent storage box (11) is fixedly connected to a reagent extraction pipe (28), and one end of the reagent extraction pipe (28) away from the reagent storage box (11) is fixedly connected to a piston cylinder (29).

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