Injection mold for the demolding of a product with deformation and method of use thereof

Abstract

The application relates to the technical field of injection molds, and discloses an injection mold for product deformation demolding and a use method thereof, which comprises a base, an adjusting part, a jacking part, and a fixing part. The adjusting part is arranged at the top of the base. The jacking part is arranged at the top of the base. The fixing part is arranged at the top of the adjusting part. The adjusting part comprises an adjusting assembly arranged at the top of the base. A limiting assembly is arranged on the adjusting assembly. The adjusting assembly comprises a lower mold fixedly connected to the top of the base. The adjusting part is arranged, the existing injection mold is demolded, elastic driving core-pulling sliders are usually used to complete shrinkage displacement, the method is prone to causing certain interference disturbance to products during the action process, the product reverse buckling part is prone to being scratched, deformed and even collapsed, and the appearance and size qualified rate of the plastic part is reduced, thereby affecting the product forming quality and the overall production stability of the mold.

Description

Technical Field

[0001] This invention relates to the field of injection molds, specifically to an injection mold for product deformation and demolding, and its method of use. Background Technology

[0002] An injection mold for product deformation and demolding belongs to injection molding mold technology. For plastic parts with undercut structures, it does not use a complex core-pulling mechanism, but relies on the deformable structure of the mold to achieve demolding. The mold includes a fixed mold, a moving mold, and a mold core insert that can be elastically deformed. After injection molding and cooling, when the mold is opened, the plastic part itself or the insert undergoes a slight deformation due to elasticity, so that the undercut part of the plastic part is freed from the constraint of the mold core and directly ejects the product. This avoids the disadvantages of traditional core-pulling mechanisms, such as large size, many parts, high manufacturing cost, and high failure rate. It simplifies the overall mold structure, reduces the number of parts, shortens the molding cycle, and is suitable for processing small-sized, thin-walled plastic parts with undercuts, balancing demolding reliability and production efficiency.

[0003] However, existing injection molds typically use elastically driven core-pulling sliders to complete shrinkage displacement during demolding. This method is prone to interference and disturbance to the product during operation, which can easily cause scratches, deformation, or even chipping of the undercut parts. This will lead to a decrease in the appearance and dimensional qualification rate of the plastic parts, thereby affecting the product molding quality and the overall production stability of the mold. Summary of the Invention

[0004] The purpose of this invention is to provide an injection mold for product deformation and demolding and its usage method. By setting an adjustment part, the invention solves the problem that existing injection molds usually use elastically driven core-pulling sliders to complete the shrinkage displacement during demolding. This method is prone to interference and disturbance to the product during the operation, which can easily cause scratches, deformation or even chipping of the undercut parts of the product. This will lead to a decrease in the appearance and dimensional qualification rate of the plastic parts, thereby affecting the product molding quality and the overall production stability of the mold.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an injection mold for product deformation and demolding, and its usage method. The mold includes a base, an adjusting part disposed on the top of the base, a lifting part disposed on the top of the base, and a fixing part disposed on the top of the adjusting part. The adjusting part includes an adjusting assembly disposed on the top of the base, and a limiting assembly disposed on the adjusting assembly. The adjusting assembly includes a lower mold fixedly connected to the top of the base. Movable grooves are formed on the inner walls of the left and right sides of the lower mold. Two limiting slide rods are slidably connected to each of the two movable grooves. Two movable molds are fixedly connected to the ends of several limiting slide rods that are close to each other, and the ends of several limiting slide rods that are far apart from each other are also fixedly connected to the lower mold. Two connecting plates are fixedly connected, and two limiting guide rods are slidably connected to each of the two connecting plates. The ends of several limiting guide rods that are close to each other are fixedly connected to the lower mold. Connecting rod 1 is hinged to the front and rear sides of the lower mold. Two connecting rod 2 are hinged to each of the two connecting rod 1. The ends of several connecting rod 2 that are away from the two connecting rod 1 are respectively hinged to the two connecting plates. Elastic elements are provided on several limiting guide rods. Two movable molds are slidably connected to two movable slots. The elastic elements include springs wrapped around the outer walls of several limiting guide rods. One end of several springs is fixedly connected to the two connecting plates, and the other end of several springs is fixedly connected to several limiting guide rods.

[0006] Furthermore, the lifting part includes a lifting assembly disposed on top of the base; and a driving assembly disposed on the lifting assembly.

[0007] Furthermore, the fixing part includes a guide assembly disposed on the lower mold; and a fixing assembly disposed on the guide assembly.

[0008] Furthermore, the limiting component includes a screw rod fixedly connected to the left side of the lower mold. The screw rod passes through a corresponding connecting plate, and the outer wall of the screw rod is slidably connected to the corresponding connecting plate. A knob is threadedly connected to the outer wall of the screw rod, and the right side of the knob is in contact with the corresponding connecting plate.

[0009] Furthermore, the lifting assembly includes a lifting groove formed on the inner wall of the bottom of the lower mold. A lifting plate is slidably connected in the lifting groove. A plurality of sliding rods 1 are fixedly connected to the bottom of the lifting plate. All of the sliding rods 1 pass through the lifting groove. A sliding plate is fixedly connected to the bottom end of the sliding rods 1. A sliding rod 2 is fixedly connected to the sliding plate. Two rectangular plates are fixedly connected to the top of the base. Two sliding rods 3 are fixedly connected to the side of the two rectangular plates that are close to each other. A sliding frame is slidably connected to the outer wall of the two sliding rods 3. Lifting grooves are formed on both sides of the sliding frame. Both ends of the sliding rod 2 extend into the two lifting grooves. The outer wall of the sliding rod 2 is slidably connected to the two lifting grooves.

[0010] Furthermore, the driving assembly includes an electric push rod fixedly connected to the corresponding rectangular plate, the output end of the electric push rod passing through the corresponding rectangular plate, the output end of the electric push rod being fixedly connected to the slide frame, and the output end of the electric push rod being slidably connected to the corresponding rectangular plate.

[0011] Furthermore, the guiding assembly includes an upper mold disposed on the top of the lower mold, a plurality of fixing blocks are fixedly connected to the lower mold, and guide rods are fixedly connected to the top of the plurality of fixing blocks respectively. A plurality of sliding blocks are fixedly connected to the upper mold, and the plurality of guide rods pass through the plurality of sliding blocks respectively. The outer walls of the plurality of guide rods are slidably connected to the plurality of sliding blocks respectively.

[0012] Furthermore, the fixing assembly includes rotating blocks rotatably connected to both sides of the lower mold. The tops of the two rotating blocks are respectively fixedly connected to screw rods two. The outer walls of the two screw rods two are respectively slidably connected to clamping plates. The outer walls of the two screw rods two are respectively threadedly connected to knobs two. The bottoms of the two knobs two are respectively in contact with the two clamping plates. The bottoms of the two clamping plates are in contact with the upper mold.

[0013] The present invention has the following beneficial effects: 1. The adjustment section has the functions of synchronous shrinkage and avoidance, and elastic adaptive reset. It can accurately avoid and adjust the side structure of the mold before product demolding. Its significance lies in effectively solving the problem that traditional demolding structure is prone to interference and scratches with the undercut parts of the product, completely avoiding demolding defects such as scratches, deformation and chipping of plastic parts, eliminating structural disturbances during demolding, greatly improving the appearance quality and dimensional accuracy of injection molded products, ensuring the qualification rate of plastic parts, and improving the overall production stability of the mold. 2. The lifting section has a smooth and uniform vertical ejection demolding function. It can lift and eject the molded product uniformly after the mold structure is completely avoided. Its significance is to achieve standardized demolding operation without interference or impact, avoid product deformation and damage caused by uneven local force, ensure a smooth and uniform demolding process, effectively reduce the demolding breakage rate, adapt to the demolding production needs of various plastic parts with undercut structure, and improve the demolding efficiency and production adaptability of the mold. 3. The fixing part has the functions of guiding positioning and locking limit for mold closing and fixing, which can realize the precise alignment and stable locking of the upper and lower molds. Its significance is that it can ensure the accuracy of injection molding and eliminate product molding defects caused by mold offset and misalignment. At the same time, it can quickly complete the locking and unlocking operations of mold opening and closing, taking into account the stability of mold forming and the convenience of demolding, effectively improving the overall structural strength of the mold and the reliability of long-term injection molding production.

[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the adjustment section of the present invention; Figure 3 This is a partial cross-sectional view of the lifting section of the present invention; Figure 4 This is a schematic diagram of the structure of the fixing part of the present invention; Figure 5 For the present invention Figure 2 A magnified structural diagram of A in the middle; Figure 6 For the present invention Figure 3 A magnified structural diagram of B in the diagram; Figure 7 For the present invention Figure 4 A magnified structural diagram of C; Figure 8 For the present invention Figure 4 A magnified structural diagram of D in the diagram.

[0017] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Base; 2. Adjustment section; 21. Adjustment assembly; 211. Lower mold; 212. Movable groove; 213. Limiting slide bar; 214. Movable mold; 215. Connecting plate; 216. Limiting guide rod; 217. Spring; 218. Connecting rod one; 219. Connecting rod two; 22. Limiting assembly; 221. Screw one; 222. Knob one; 3. Lifting section; 31. Lifting assembly; 311. Lifting groove; 312. Lifting plate; 31 3. Slide bar one; 314. Sliding plate; 315. Slide bar two; 316. Rectangular plate; 317. Slide bar three; 318. Sliding frame; 319. Lifting slide groove; 32. Drive assembly; 321. Electric push rod; 4. Fixing part; 41. Guide assembly; 411. Upper mold; 412. Fixing block; 413. Guide rod; 414. Sliding block; 42. Fixing assembly; 421. Rotating block; 422. Screw two; 423. Clamping plate; 424. Knob two. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 - Figure 8 As shown, the present invention is an injection mold for product deformation and demolding and its usage method, including a base 1, an adjusting part 2, the adjusting part 2 being disposed on the top of the base 1; a lifting part 3, the lifting part 3 being disposed on the top of the base 1; and a fixing part 4, the fixing part 4 being disposed on the top of the adjusting part 2; The adjustment unit 2 includes an adjustment assembly 21, which is disposed on the top of the base 1; and a limiting assembly 22, which is disposed on the adjustment assembly 21. The adjustment assembly 21 includes a lower mold 211 fixedly connected to the top of the base 1. Movable grooves 212 are provided on the inner walls of the left and right sides of the lower mold 211. Two limiting slide rods 213 are slidably connected in the two movable grooves 212 respectively. Two movable molds 214 are fixedly connected to the ends of several limiting slide rods 213 that are close to each other, and two connecting plates 215 are fixedly connected to the ends of several limiting slide rods 213 that are far from each other. Two limiting guide rods 216 are slidably connected to the two connecting plates 215 respectively. The ends of several limiting guide rods 216 that are close to each other are fixedly connected to the lower mold 211. Connecting rods 218 are hinged to the front and rear sides of the lower mold 211. Two connecting rods 218 are hinged to the two connecting rods 218 respectively. Connecting rod 219, one end of several connecting rods 219 away from the two connecting rods 218 is respectively hinged to two connecting plates 215, several limiting guide rods 216 are respectively provided with elastic elements, two movable molds 214 are respectively slidably connected to two movable slots 212, the elastic elements include springs 217 wrapped around the outer wall of several limiting guide rods 216, one end of several springs 217 is fixedly connected to the two connecting plates 215, and the other end of several springs 217 is fixedly connected to several limiting guide rods 216, the limiting component 22 includes a screw 221 fixedly connected to the left side of the lower mold 211, the screw 221 passes through the corresponding connecting plate 215, the outer wall of the screw 221 is slidably connected to the corresponding connecting plate 215, the outer wall of the screw 221 is threadedly connected to a knob 222, and the right side of the knob 222 is in contact with the corresponding connecting plate 215.

[0020] The lifting part 3 includes a lifting assembly 31, which is disposed on the top of the base 1; and a driving assembly 32, which is disposed on the lifting assembly 31. The lifting assembly 31 includes a lifting groove 311 formed in the inner wall of the bottom of the lower mold 211. A lifting plate 312 is slidably connected in the lifting groove 311. Several sliding rods 313 are fixedly connected to the bottom of the lifting plate 312. The sliding rods 313 all pass through the lifting groove 311. A sliding plate 314 is fixedly connected to the bottom end of the sliding rods 313. A sliding rod 315 is fixedly connected to the sliding plate 314. Two rectangular plates 316 are fixedly connected to the top of the base 1. 6. Two sliding rods 317 are fixedly connected to each other on one side. The outer walls of the two sliding rods 317 are slidably connected to a sliding frame 318. Lifting grooves 319 are provided on both sides of the sliding frame 318. Both ends of the sliding rod 315 extend into the two lifting grooves 319. The outer walls of the sliding rod 315 are slidably connected to the two lifting grooves 319. The drive assembly 32 includes an electric push rod 321 fixedly connected to the corresponding rectangular plate 316. The output end of the electric push rod 321 passes through the corresponding rectangular plate 316. The output end of the electric push rod 321 is fixedly connected to the sliding frame 318 and slidably connected to the corresponding rectangular plate 316.

[0021] The fixing part 4 includes a guide assembly 41, which is disposed on the lower mold 211; and a fixing assembly 42, which is disposed on the guide assembly 41. The guide assembly 41 includes an upper mold 411 disposed on the top of the lower mold 211. A plurality of fixing blocks 412 are fixedly connected to the lower mold 211, and guide rods 413 are fixedly connected to the tops of the fixing blocks 412 respectively. A plurality of sliding blocks 414 are fixedly connected to the upper mold 411, and the guide rods 413 pass through the sliding blocks 414 respectively. The outer walls of the guide rods 413 are slidably connected to a number of sliding blocks 414. The fixing assembly 42 includes rotating blocks 421 rotatably connected to both sides of the lower mold 211. The tops of the two rotating blocks 421 are respectively fixedly connected to screw rods 422. The outer walls of the two screw rods 422 are respectively slidably connected to clamping plates 423. The outer walls of the two screw rods 422 are respectively threadedly connected to knobs 424. The bottoms of the two knobs 424 are respectively in contact with the two clamping plates 423. The bottoms of the two clamping plates 423 are in contact with the upper mold 411.

[0022] It should be noted that the control of the electric actuator 321 in this application can be achieved by using a program set in the control panel and inputting relevant parameters as needed for automated control. This control method can be implemented using existing technologies, such as PLC.

[0023] During demolding, first unscrew the knobs 424 on the outer wall of the two screws 422 to release the restriction on the two clamping plates 423. Then, remove the two clamping plates 423 from the top of the upper mold 411 to separate the upper mold 411 from the lower mold 211. Next, unscrew the knobs 222 on the outer wall of the screw 221 to release the restriction on the corresponding connecting plate 215. Then, pull the connecting plate 215 outward to allow it to move smoothly outward under the guidance of the two limiting guide rods 216, while simultaneously compressing the springs 217 on the outer wall of the two limiting guide rods 216. 17. Accumulate elastic potential energy to support subsequent reset; and during the outward movement of the connecting plate 215, the corresponding movable mold 214 can be retracted into the corresponding movable groove 212 by the two limiting slide rods 213 to prevent interference with the demolding operation of the molded product. At the same time, the connecting plate 215 can also be driven by the hinge of the four connecting rods 219 and the two connecting rods 218 to make the connecting plate 215 on the other side move outward synchronously under the guidance of the two limiting guide rods 216, thereby driving the movable mold 214 on the other side to retract into the corresponding movable groove 212. Once both movable molds 214 have retracted to their positions and removed any interference with product demolding, the electric push rod 321 can be activated. The electric push rod 321 will push the slide frame 318 to slide guided by the two slide rods 317. During the sliding of the slide frame 318, the lifting grooves 319 on both sides will slide and engage with the slide rods 315 on the sliding plate 314. Through the guiding action of the lifting grooves 319, the slide rods 315 can drive the sliding plate 314 to rise. Then, the sliding plate 314 will push the lifting plate 312 to move smoothly upward in the lifting groove 311 through the four slide rods 313, thereby lifting and demolding the product formed in the lower mold 211.

[0024] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An injection mold for product deformation and demolding, comprising a base (1), characterized in that: Adjustment part (2), the adjustment part (2) is disposed on the top of the base (1); A lifting part (3) is provided on the top of the base (1); The fixing part (4) is provided with the top of the adjusting part (2); The adjustment section (2) includes an adjustment assembly (21) disposed on the top of the base (1); and A limiting component (22) is disposed on the adjusting component (21); The adjustment assembly (21) includes a lower mold (211) fixedly connected to the top of the base (1). Movable grooves (212) are provided on the inner walls of the left and right sides of the lower mold (211). Two limiting slide rods (213) are slidably connected in each of the two movable grooves (212). Two movable molds (214) are fixedly connected to the ends of several limiting slide rods (213) that are close to each other. Two connecting plates (215) are fixedly connected to the ends of several limiting slide rods (213) that are far apart from each other. The two connecting plates (215) have... Two limiting guide rods (216) are slidably connected to each other. The ends of several limiting guide rods (216) that are close to each other are fixedly connected to the lower mold (211). Connecting rods 1 (218) are hinged to the front and rear sides of the lower mold (211). Two connecting rods 2 (219) are hinged to the two connecting rods 1 (218). The ends of several connecting rods 2 (219) that are away from the two connecting rods 1 (218) are hinged to two connecting plates (215). Elastic elements are provided on several limiting guide rods (216). Among them, the two movable molds (214) are slidably connected to the two movable slots (212) respectively.

2. The injection mold for product deformation and demolding according to claim 1, characterized in that: The lifting section (3) includes a lifting assembly (31) disposed on top of the base (1); and A drive component (32) is disposed on a lifting component (31).

3. The injection mold for product deformation and demolding according to claim 2, characterized in that: The fixing part (4) includes a guide assembly (41) disposed on the lower mold (211); and A fixing component (42) is disposed on a guide component (41).

4. The injection mold for product deformation and demolding according to claim 3, characterized in that: The limiting component (22) includes a screw (221) fixedly connected to the left side of the lower mold (211). The screw (221) passes through the corresponding connecting plate (215). The outer wall of the screw (221) is slidably connected to the corresponding connecting plate (215). The outer wall of the screw (221) is threadedly connected to a knob (222). Among them, the right side of knob one (222) is in contact with the corresponding connecting plate (215).

5. The injection mold for product deformation and demolding according to claim 4, characterized in that: The lifting assembly (31) includes a lifting groove (311) formed on the inner wall of the bottom of the lower mold (211). A lifting plate (312) is slidably connected in the lifting groove (311). A plurality of sliding rods (313) are fixedly connected to the bottom of the lifting plate (312). The plurality of sliding rods (313) all penetrate the lifting groove (311). A sliding plate (314) is fixedly connected to the bottom end of the plurality of sliding rods (313). A sliding rod 2 (315) is fixedly connected. Two rectangular plates (316) are fixedly connected to the top of the base (1). Two sliding rods 3 (317) are fixedly connected to the side of the two rectangular plates (316) that are close to each other. A sliding frame (318) is slidably connected to the outer wall of the two sliding rods 3 (317). Lifting grooves (319) are provided on both sides of the sliding frame (318). Both ends of the sliding rod 2 (315) extend into the two lifting grooves (319). Among them, the outer wall of the slide bar 2 (315) is slidably connected to the two lifting slide grooves (319).

6. The injection mold for product deformation and demolding according to claim 5, characterized in that: The drive assembly (32) includes an electric push rod (321) fixedly connected to the corresponding rectangular plate (316), the output end of the electric push rod (321) passes through the corresponding rectangular plate (316), and the output end of the electric push rod (321) is fixedly connected to the slide frame (318). The output end of the electric push rod (321) is slidably connected to the corresponding rectangular plate (316).

7. The injection mold for product deformation and demolding according to claim 6, characterized in that: The guide assembly (41) includes an upper mold (411) disposed on the top of the lower mold (211), a plurality of fixed blocks (412) are fixedly connected to the lower mold (211), and guide rods (413) are fixedly connected to the top of the plurality of fixed blocks (412), and a plurality of sliding blocks (414) are fixedly connected to the upper mold (411), and the plurality of guide rods (413) pass through the plurality of sliding blocks (414). Among them, the outer walls of several guide rods (413) are slidably connected to several sliding blocks (414).

8. The injection mold for product deformation and demolding according to claim 7, characterized in that: The fixing component (42) includes rotating blocks (421) rotatably connected to both sides of the lower mold (211). The tops of the two rotating blocks (421) are respectively fixedly connected to screw rods (422). The outer walls of the two screw rods (422) are respectively slidably connected to clamping plates (423). The outer walls of the two screw rods (422) are respectively threadedly connected to knobs (424). The bottoms of the two knobs (424) are respectively in contact with the two clamping plates (423). The bottoms of both plates (423) are in contact with the upper mold (411).

9. The injection mold for product deformation and demolding according to claim 8, characterized in that: The elastic element includes springs (217) wrapped around the outer wall of several limiting guide rods (216). One end of each spring (217) is fixedly connected to two connecting plates (215), and the other end of each spring (217) is fixedly connected to several limiting guide rods (216).

10. A method of using a product deformation and demolding injection mold, comprising the product deformation and demolding injection mold as described in claim 9, characterized in that: Includes the following steps, S1: When demolding, first unscrew the knobs (424) on the outer wall of the two screws (422) to release the limiting position on the two clamping plates (423). Then, remove the two clamping plates (423) from the top of the upper mold (411) to separate the upper mold (411) from the lower mold (211). Next, unscrew the knobs (222) on the outer wall of the screw (221) so that the knobs (222) can release the limiting position on the corresponding connecting plate (215). Then, pull the connecting plate (215) outward so that it moves outward smoothly under the guidance of the two limiting guide rods (216) and simultaneously compresses the springs (217) on the outer wall of the two limiting guide rods (216). This allows the spring (217) to accumulate elastic potential energy, providing support for subsequent reset; and during the outward movement of the connecting plate (215), the corresponding movable mold (214) can be retracted into the corresponding movable groove (212) through the two limiting slide rods (213), preventing interference with the demolding operation of the molded product. At the same time, the connecting plate (215) can also be driven by the hinge of the four connecting rods (219) and the two connecting rods (218), so that the connecting plate (215) on the other side can also move outward synchronously under the guidance of the two limiting guide rods (216), thereby driving the movable mold (214) on the other side to retract into the corresponding movable groove (212); S2: When both movable molds (214) have retracted to their positions and removed the interference with the demolding of the product, the electric push rod (321) can be activated. The electric push rod (321) will push the slide frame (318) to slide with the two slide rods (317) as guides. During the sliding of the slide frame (318), the lifting grooves (319) on both sides will slide and cooperate with the slide rods (315) on the sliding plate (314). Through the guiding effect of the lifting grooves (319), the slide rods (315) can drive the sliding plate (314) to rise. Then, the sliding plate (314) will push the lifting plate (312) to move smoothly upward in the lifting groove (311) through the four slide rods (313), thereby lifting and demolding the product formed in the lower mold (211).

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