Injection product shaping device and working method thereof

Abstract

The invention discloses an injection molding product shaping device and a working method. The shaping device comprises a workbench, and a feeding and discharging mechanism, a positioning mechanism and a shaping mechanism are arranged on the workbench. The positioning mechanism comprises a base, a clamp mounting plate and a clamp, the clamp comprises a bottom fixing plate and a positioning block, and the side wall of the injection product is flush with or protrudes outwards from the outer edge of the bottom fixing plate. The positioning columns correspond to the positioning holes of the fixture mounting plate, and are provided with profiling press-fit surfaces close to the fixture, and the shapes of the profiling press-fit surfaces are matched with those of the fixture and a product; the lifting mechanism drives the positioning column to ascend and descend, so that the profiling pressing face selectively presses the clamp or synchronously presses the clamp and the side end of the product. Dynamic adaptation is achieved through the profiling pressing faces of the positioning columns, a low-deformation product only presses the clamp, and surface damage caused by excessive constraint is avoided; a high-deformation or burr product synchronously presses the clamp and the side end of the product, displacement is accurately restrained, material shrinkage is guided, and the size precision is ensured. A single positioning column integrates a double limiting function, and multiple sets of clamps and complex adjusting mechanisms are omitted.

Description

Technical Field

[0001] The invention relates to the technical field of injection molded parts production and processing equipment, and in particular to an injection molded product shaping device and a working method thereof. Background Art

[0002] The core task of the injection molding product shaping device is to correct product deformation and improve dimensional accuracy through the cooperation of the clamp and the limiting mechanism. In the prior art, the typical solution is to fix the clamp with a positioning column, and then limit the product with the positioning structure of the clamp (such as the side wall buckle or bolt). For example, a common design is to achieve overall fixation by pressing the bottom of the clamp with a positioning column, and the side wall of the clamp is provided with a limiting groove or clamping claw, and the side end of the product is locked by bolts. This solution relies on the rigid constraint of the clamp itself. Although it can adapt to some scenarios, it has significant limitations.

[0003] In actual production, the same injection molded product may present different deformation states due to injection molding process fluctuations (such as uneven temperature, insufficient pressure holding or mold wear). When the product deformation is small or only simple plane correction is required, only fixing the fixture without forcibly limiting the side ends of the product has obvious advantages: Avoid excessive constraints: low-deformation products can rebound freely during the hot pressing process, reducing stress concentration or surface indentations caused by lateral limitations; simplify the operation process: no additional locking of the product side ends is required, shortening the clamping time and improving the efficiency of the production line; reduce cost risks: avoid potential damage to high-precision products (such as optical components and thin-walled parts) by complex limiting mechanisms.

[0004] However, if there is a large deformation or burr on the side wall of the product, the fixture and the side end of the product need to be fixed synchronously to ensure the shaping accuracy: Suppress displacement: The lateral limit can prevent the material from shifting due to softening during the hot pressing process; Precise correction: Apply directional constraints to the deformed area to guide the material to shrink to the target shape.

[0005] To cope with these two different needs, the existing technology requires the design of two independent fixtures - one set of fixed fixtures and the other set of integrated lateral limit structures. This separate design not only increases the cost of fixture development and maintenance, but also requires shutdown to replace fixtures or manually adjust the limit mechanism when changing models, resulting in a significant decrease in production efficiency. This rigid adaptation logic is difficult to meet dynamic production needs, especially in high value-added, multi-batch product scenarios, where yield and cost control face huge challenges. Summary of the invention

[0006] Purpose of the invention: The purpose of the present invention is to provide an injection molding product shaping device and a working method thereof, so as to solve the problem in the prior art that a single positioning mode leads to excessive constraint or insufficient limitation.

[0007] Technical solution:

[0008] An injection molding product shaping device comprises a workbench, wherein a loading and unloading mechanism, a positioning mechanism and a shaping mechanism for the injection molding product are arranged on the upper end of the workbench;

[0009] The positioning mechanism comprises:

[0010] A base, mounted on the upper end of the workbench;

[0011] The fixture mounting plate is arranged at the upper end of the base and has a plurality of positioning holes on its surface;

[0012] The fixture comprises a bottom fixing plate and a positioning block, wherein the bottom fixing plate is connected to the fixture mounting plate, and its outer edge extends to the side end of the positioning hole area, and the positioning block is arranged on the bottom fixing plate for fixing the injection molded product;

[0013] At least part of the side wall of the injection molded product is flush with or convex to the outer edge of the bottom fixing plate;

[0014] The positioning column corresponds to the positioning hole one by one, and a contoured pressing surface is provided on the side of the positioning column close to the fixture, and the shape of the contoured pressing surface matches the outer edge of the bottom fixing plate and the extended side wall of the injection molded product;

[0015] The lifting mechanism drives the positioning column to move vertically. When the positioning column rises, the contoured pressing surface can selectively press the bottom fixing plate or simultaneously press the bottom fixing plate and the extended side wall of the injection molded product.

[0016] Furthermore, at least part of the side wall of the injection molded product protrudes outward from the bottom fixing plate, and the protruding part is located in the area where the positioning hole is located. The contoured pressing surface includes a clamp fixing section and a product fixing section; the clamp fixing section is located at the lower part of the positioning column, and its shape matches the outer edge of the bottom fixing plate; the product fixing section is located at the upper part of the positioning column, and its shape matches the contour of the convex side wall of the injection molded product.

[0017] Furthermore, the convex portion of the injection molded product is flush or gradually increases from bottom to top.

[0018] Furthermore, at least three side walls of the injection molded product that are not entirely within the semicircle on the same side are flush with or convex to the outer edge of the bottom fixing plate.

[0019] Furthermore, the positioning mechanism also includes a locking column and a locking hole, the locking hole is opened on the fixture mounting plate, the lifting mechanism synchronously drives the locking column and the positioning column to rise and fall, and the locking column and the locking hole cooperate to fix the relative position of the fixture mounting plate and the base.

[0020] Furthermore, the shaping mechanism includes a shaping mold and a shaping cylinder for controlling the lifting and lowering of the shaping mold.

[0021] Furthermore, the loading and unloading mechanism includes a loading and conveying assembly, a grabbing assembly and a flipping and unloading assembly. The loading and conveying assembly includes a loading conveyor belt and a conveying tool for the injection molded product arranged above the loading conveyor belt; the grabbing assembly includes a multi-degree-of-freedom manipulator; the flipping and unloading assembly includes a rotating cylinder and two centrally symmetrical unloading tools connected to the rotating cylinder.

[0022] Furthermore, the feeding conveyor belt is a screw structure, the conveying tool is transmission-connected to the screw structure via a movable seat, and two conveying tools are arranged on each movable seat; the freedom manipulator includes two grasping devices.

[0023] The present invention also discloses a working method of an injection molded product shaping device, wherein at least a portion of the side wall of the injection molded product is flush with the outer edge of the bottom fixing plate, comprising the following steps:

[0024] S1. The loading and unloading mechanism cooperates with the positioning mechanism to fix the injection molded product on the bottom fixing plate of the fixture;

[0025] S2, Selective horizontal limit:

[0026] If the injection molded product does not require lateral limit, the lifting mechanism drives the positioning column to rise to the first height, at which time the contoured pressing surface only performs horizontal limit fixation on the bottom fixing plate;

[0027] If the injection molded product needs lateral limitation, the lifting mechanism drives the positioning column to rise to the second height, at which time the contoured pressing surface simultaneously limits and fixes the bottom fixing plate and the injection molded product horizontally;

[0028] S3, start the shaping mechanism to shape the injection molded product;

[0029] S4. After the shaping is completed, the lifting mechanism drives the positioning column to descend and reset, and the loading and unloading mechanism transfers the finished product to the next process.

[0030] Furthermore, in step S2, the injection molded product needs to be laterally limited, and the lifting mechanism drives the positioning column to rise to a second height. At this time, the clamp fixing section of the contoured pressing surface horizontally limits and fixes the bottom fixing plate, and the product fixing section also horizontally limits and fixes the injection molded product.

[0031] Beneficial effects:

[0032] 1. The core innovation of the present invention is to selectively press the fixture or synchronously press the fixture and the side end of the product through the contoured pressing surface of the positioning column to achieve dynamic adaptation to the needs of different product states. Its significant advantages are: when shaping low-deformation products, only fixing the side end of the fixture can avoid surface indentations or stress concentration caused by excessive constraints, while simplifying the operation process and reducing cost risks; when shaping high-deformation or burr products, synchronously pressing the fixture and the side end of the product can accurately suppress displacement and guide the material to shrink in a directional manner, ensuring dimensional accuracy and yield.

[0033] 2. By integrating dual limit functions into a single positioning column, the traditional multiple sets of fixtures or complex adjustment mechanisms are eliminated, the equipment complexity and manufacturing costs are greatly reduced, and the changeover efficiency is significantly improved, especially suitable for the flexible production needs of multiple batches and high value-added products. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a stereogram of the present invention;

[0035] Figure 2 It is an enlarged stereoscopic view of the position of the positioning mechanism and the shaping mechanism of the present invention;

[0036] Figure 3 It is an enlarged stereoscopic view of the flip blanking assembly of the present invention;

[0037] Figure 4 is an enlarged stereogram of the positioning mechanism of the present invention;

[0038] Figure 5 It is a working principle diagram of the positioning column of the present invention;

[0039] Figure 6 It is a schematic diagram of the fixing section of the positioning column fixture and the product fixing section of the present invention;

[0040] Figure 7 is a schematic diagram of a locking column and a locking hole of the present invention;

[0041] Figure numerals: 1. workbench; 2. loading and unloading mechanism; 21. loading and conveying assembly; 211. loading and conveying belt; 212. conveying tooling; 213. moving seat; 22. grabbing assembly; 23. flip unloading assembly; 231. rotating cylinder; 232. unloading tooling; 3. positioning mechanism; 31. base; 32. fixture mounting plate; 33. fixture; 331. bottom fixing plate; 332. positioning block; 34. positioning hole; 35. positioning column; 351. contoured pressing surface; 3511. fixture fixing section; 3512. product fixing section; 36. lifting mechanism; 37. locking column; 38. locking hole; 4. shaping mechanism; 41. shaping mold; 42. shaping cylinder; 5. injection molded product. DETAILED DESCRIPTION

[0042] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] like Figure 1-7 As shown, an injection molding product shaping device comprises a workbench 1, wherein a loading and unloading mechanism 2, a positioning mechanism 3, and a shaping mechanism 4 for an injection molding product 5 are arranged on the upper end of the workbench 1;

[0045] The positioning mechanism 3 comprises:

[0046] A base 31 is installed on the upper end of the workbench 1;

[0047] The fixture mounting plate 32 is disposed on the upper end of the base 31 and has a plurality of positioning holes 34 on its surface;

[0048] The fixture 33 includes a bottom fixing plate 331 and a positioning block 332. The bottom fixing plate 331 is connected to the fixture mounting plate 32, and its outer edge extends to the side end of the positioning hole 34 area. The positioning block 332 is arranged on the bottom fixing plate 331 and is used to fix the injection molded product 5. The base 31 and the fixture mounting plate 32 form a stable supporting structure. The bottom fixing plate 331 extends outward to the positioning hole 34 area to provide a space basis for the subsequent pressing action of the positioning column 35, thereby ensuring the precise alignment of the fixture 33 and the positioning column 35.

[0049] At least part of the side wall of the injection molded product 5 is flush with or convex to the outer edge of the bottom fixing plate 331; through the convex or flush design, the side wall of the product and the side end of the fixture form a continuous or extended surface, providing a matching contact area for the contoured pressing surface 351 of the positioning column 35 to ensure the positioning accuracy;

[0050] The positioning posts 35 correspond to the positioning holes 34 one by one. A contoured pressing surface 351 is provided on one side of the positioning posts 35 close to the fixture 33. The contoured pressing surface 351 matches the outer edge of the bottom fixing plate 331 and the extended side wall of the injection molded product 5. The contoured pressing surface 351 matches the fixture and the product contour, and achieves uniform pressure distribution through physical bonding, avoiding local overpressure or underpressure, and improving the consistency of shaping.

[0051] The lifting mechanism 36 drives the positioning column 35 to move vertically. When the positioning column 35 rises, the contoured pressing surface 351 can selectively press the bottom fixing plate 331 or simultaneously press the bottom fixing plate 331 and the extended side wall of the injection molded product 5. The lifting mechanism 36 realizes two clamping modes through height control - only fixing the clamp or synchronously fixing the clamp and the product, dynamically adapting to different deformation states, and solving the defects of traditional limiters.

[0052] Furthermore, at least part of the side wall of the injection molded product 5 protrudes from the bottom fixing plate 331, and the protruding part is located in the area where the positioning hole is located. The contoured pressing surface 351 includes a clamp fixing section 3511 and a product fixing section 3512; the clamp fixing section 3511 is located at the lower part of the positioning column 35, and its shape matches the outer edge of the bottom fixing plate 331; the product fixing section 3512 is located at the upper part of the positioning column 35, and its shape matches the contour of the convex side wall of the injection molded product 5. The split contoured pressing surface 351 is designed with upper and lower sections to adapt to the clamp and product contours respectively to achieve precise limiting. The clamp fixing section 3511 preferentially presses the clamp to ensure the stability of the foundation; the product fixing section 3512 imposes constraints on the convex side wall to suppress displacement. Targeted limiting can be performed for different products.

[0053] Furthermore, the convex part of the injection molded product 5 is flush or gradually enlarged from bottom to top. The flush design of the convex part is suitable for simple structure products (such as rectangular bosses), and the gradually enlarged design is suitable for conical or curved products (such as car lampshades). The gradual contour matches the material shrinkage direction to reduce residual stress.

[0054] Furthermore, at least three side walls of the injection molded product 5 that are not entirely within the semicircle on the same side are flush with or convex to the outer edge of the bottom fixing plate 331. The asymmetrical distribution of multiple side walls avoids stress concentration and disperses the pressing force of the positioning column 35, ensuring that the product is balanced during the shaping process and preventing deformation or damage caused by unilateral overload.

[0055] like Figure 7 As shown, the positioning mechanism 3 also includes a locking column 37 and a locking hole 38. The locking hole 38 is opened on the fixture mounting plate 32. The lifting mechanism 36 synchronously drives the locking column 37 and the positioning column 35 to rise and fall. The locking column 37 and the locking hole 38 cooperate to fix the relative position of the fixture mounting plate 32 and the base 31. The locking column 37 and the positioning column 35 are synchronously lifted and lowered, and the fixture mounting plate 32 is first fixed before the product is pressed, eliminating the risk of relative displacement between the fixture and the base 31, improving the rigidity of the system, and ensuring the shaping accuracy.

[0056] Furthermore, the shaping mechanism 4 includes a shaping die 41 and a shaping cylinder 42 for controlling the lifting of the shaping die 41. The shaping die 41 is driven by the cylinder to achieve rapid downward pressing and resetting, and combined with hot pressing or cold pressing process, a directional correction force is applied to the deformed area to restore the product design size.

[0057] Furthermore, the loading and unloading mechanism 2 includes a loading and conveying assembly 21, a grabbing assembly 22 and a flipping and unloading assembly 23. The loading and conveying assembly 21 includes a loading conveyor belt 211 and a conveying fixture 212 for injection molded products arranged above the loading conveyor belt 211; the grabbing assembly 22 includes a multi-degree-of-freedom manipulator; the flipping and unloading assembly 23 includes a rotating cylinder 231 and two centrally symmetrical unloading fixtures 232 connected to the rotating cylinder. The loading conveyor belt 211 and the manipulator cooperate to realize automatic loading, and the flipping and unloading assembly 23 quickly transfers finished products through the centrally symmetrical fixture, reducing manual intervention, and shortening the single-piece processing cycle by more than 20%.

[0058] Furthermore, the feeding conveyor belt 211 is a screw structure, the conveying fixture 212 is connected to the screw structure through a moving seat 213, and two conveying fixtures 212 are arranged on each moving seat 213; the freedom manipulator includes two grippers. The screw drive ensures high-precision positioning of the conveying fixture 212, and the double fixture design improves the feeding efficiency; the double gripping manipulator supports parallel operation, further shortening the cycle time.

[0059] Example 2

[0060] The present invention also discloses a working method of an injection molding product shaping device, wherein at least a portion of the side wall of the injection molding product 5 is flush with the outer edge of the bottom fixing plate 331, comprising the following steps:

[0061] S1, the loading and unloading mechanism 2 cooperates with the positioning mechanism 3 to fix the injection molded product 5 on the bottom fixing plate 331 of the fixture 33;

[0062] S2, Selective horizontal limit:

[0063] If the injection molded product does not require lateral positioning, the lifting mechanism 36 drives the positioning column 35 to rise to a first height, at which time the contoured pressing surface 351 only performs horizontal positioning and fixing of the bottom fixing plate 331;

[0064] If the injection molded product needs to be laterally limited, the lifting mechanism 36 drives the positioning column 35 to rise to the second height, at which time the contoured pressing surface 351 simultaneously limits and fixes the bottom fixing plate 331 and the injection molded product horizontally;

[0065] The limit mode is automatically selected according to the product deformation. Low-deformation products avoid excessive constraints, and high-deformation products accurately suppress displacement, and the yield rate is increased to more than 98%. The deformation can be detected by visual sensors;

[0066] S3, start the shaping mechanism 4 to shape the injection molded product 5;

[0067] S4. After the shaping is completed, the lifting mechanism 36 drives the positioning column 35 to descend and reset, and the loading and unloading mechanism 2 transfers the finished product to the next process.

[0068] Furthermore, in step S2, the injection molded product needs to be laterally limited, and the lifting mechanism 36 drives the positioning column 35 to rise to the second height. At this time, the clamp fixing section 3511 of the contoured pressing surface 351 horizontally limits and fixes the bottom fixing plate 331, and the product fixing section 3512 simultaneously horizontally limits and fixes the injection molded product 5; the staged clamping logic prioritizes fixing the clamp, and then constrains the side end of the product to avoid clamp deviation caused by synchronous pressure, thereby ensuring system stability.

[0069] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An injection molding product shaping device, characterized in that: It comprises a workbench (1), wherein the upper end of the workbench (1) is provided with a loading and unloading mechanism (2), a positioning mechanism (3), and a shaping mechanism (4) for an injection molded product (5); The positioning mechanism (3) comprises: A base (31) mounted on the upper end of the workbench (1); A fixture mounting plate (32) is disposed on the upper end of the base (31) and has a plurality of positioning holes (34) formed on its surface; The clamp (33) comprises a bottom fixing plate (331) and a positioning block (332), wherein the bottom fixing plate (331) is connected to the clamp mounting plate (32), and its outer edge extends to the side end of the positioning hole (34) area, and the positioning block (332) is arranged on the bottom fixing plate (331) and is used to fix the injection molded product (5); At least part of the side wall of the injection molded product (5) is flush with or convex to the outer edge of the bottom fixing plate (331); The positioning posts (35) correspond to the positioning holes (34) one by one, and a contoured pressing surface (351) is provided on one side of the positioning posts (35) close to the clamp (33), wherein the contoured pressing surface (351) matches the outer edge of the bottom fixing plate (331) and the extended side wall of the injection molded product (5); The lifting mechanism (36) drives the positioning column (35) to move vertically. When the positioning column (35) rises, the contoured pressing surface (351) can selectively press the bottom fixing plate (331) or simultaneously press the bottom fixing plate (331) and the extended side wall of the injection molded product (5).

2. The device for shaping injection molded products according to claim 1, characterized in that: At least part of the side wall of the injection molded product (5) protrudes outward from the bottom fixing plate (331), and the protruding part is located in the area where the positioning hole is located. The contoured pressing surface (351) comprises a clamp fixing section (3511) and a product fixing section (3512); the clamp fixing section (3511) is located at the bottom of the positioning column (35), and its shape matches the outer edge of the bottom fixing plate (331); the product fixing section (3512) is located at the top of the positioning column (35), and its shape matches the contour of the protruding side wall of the injection molded product (5).

3. The device for shaping injection molded products according to claim 2, characterized in that: The convex part of the injection molded product (5) is flush or gradually increases from bottom to top.

4. The device for shaping injection molded products according to claim 1, characterized in that: At least three side walls of the injection molded product (5) that are not entirely within the semicircle on the same side are flush with or convex to the outer edge of the bottom fixing plate (331).

5. The device for shaping injection molded products according to claim 1, characterized in that: The positioning mechanism (3) further comprises a locking column (37) and a locking hole (38), wherein the locking hole (38) is formed on the fixture mounting plate (32), and the lifting mechanism (36) synchronously drives the locking column (37) and the positioning column (35) to rise and fall, and the locking column (37) and the locking hole (38) cooperate to fix the relative position of the fixture mounting plate (32) and the base (31).

6. The device for shaping injection molded products according to claim 1, characterized in that: The shaping mechanism (4) comprises a shaping die (41) and a shaping cylinder (42) for controlling the lifting and lowering of the shaping die (41).

7. The device for shaping injection molded products according to claim 1, characterized in that: The loading and unloading mechanism (2) comprises a loading and conveying assembly (21), a gripping assembly (22) and a flipping and unloading assembly (23); the loading and conveying assembly (21) comprises a loading and conveying belt (211) and a conveying fixture (212) for injection molded products arranged above the loading and conveying belt (211); the gripping assembly (22) comprises a multi-degree-of-freedom manipulator; and the flipping and unloading assembly (23) comprises a rotating cylinder (231) and two centrally symmetrical unloading fixtures (232) connected to the rotating cylinder (231).

8. The device for shaping injection molded products according to claim 7, characterized in that: The loading conveyor belt (211) is a lead screw structure, the conveying tool (212) is transmission-connected to the lead screw structure via a moving seat (213), and two conveying tool (212) are arranged on each moving seat (213); the freedom manipulator includes two grippers.

9. A working method using the injection molding product shaping device according to claim 1, characterized in that: The injection molded product (5) has at least a portion of its side wall flush with the outer edge of the bottom fixing plate (331), comprising the following steps: S1, the loading and unloading mechanism (2) cooperates with the positioning mechanism (3) to fix the injection molded product (5) on the bottom fixing plate (331) of the fixture (33); S2, Selective horizontal limit: If the injection molded product does not require lateral positioning, the lifting mechanism (36) drives the positioning column (35) to rise to a first height, at which time the contoured pressing surface (351) only performs horizontal positioning and fixing on the bottom fixing plate (331); If the injection molded product needs to be limited laterally, the lifting mechanism (36) drives the positioning column (35) to rise to a second height, at which time the contoured pressing surface (351) simultaneously limits and fixes the bottom fixing plate (331) and the injection molded product horizontally; S3, starting the shaping mechanism (4) to shape the injection molded product (5); S4. After the shaping is completed, the lifting mechanism (36) drives the positioning column (35) to descend and reset, and the loading and unloading mechanism (2) transfers the finished product to the next process.

10. The working method of the injection molding product shaping device according to claim 9, characterized in that: At least part of the side wall of the injection molded product (5) protrudes outward from the bottom fixing plate (331), and the protruding part is located in the area where the positioning hole is located. The contoured pressing surface (351) comprises a clamp fixing section (3511) and a product fixing section (3512); the clamp fixing section (3511) is located at the bottom of the positioning column (35), and its shape matches the outer edge of the bottom fixing plate (331); the product fixing section (3512) is located at the top of the positioning column (35), and its shape matches the contour of the protruding side wall of the injection molded product (5). In step S2, the injection molded product needs to be laterally limited, and the lifting mechanism (36) drives the positioning column (35) to rise to a second height. At this time, the clamp fixing section (3511) of the contoured pressing surface (351) horizontally limits and fixes the bottom fixing plate (331), and the product fixing section (3512) simultaneously horizontally limits and fixes the injection molded product (5).

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