A jig for feeding and discharging materials on a double-cavity rotary injection molding machine

Abstract

The utility model provides a kind of jig for feeding and discharging of upper and lower die cavity rotary interchanging type injection molding machine, including the substrate fixed in mechanical hand execution end, the front side plate surface of substrate is equipped with diaphragm feeding mechanism, finished product off-line mechanism and the multiple die positioning column corresponding with the positioning hole on the dynamic die of injection molding machine, diaphragm feeding mechanism includes a group of diaphragm suction mechanism and corresponding front push driving mechanism being equipped in the upper portion of the front side plate surface of substrate, the whole of a group of diaphragm suction mechanism is left-right symmetry along the central axis of the front side plate surface of substrate, finished product off-line mechanism includes nozzle clamping mechanism and a group of product clamping mechanism being equipped in the lower portion of the front side plate surface of substrate, the whole of a group of product clamping mechanism is left-right symmetry along the central axis of the front side plate surface of substrate.The utility model can complete diaphragm feeding of upper die cavity and finished product off-line operation of lower die cavity in single operation cycle simultaneously, with the advantages of low equipment cost, high operation efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of jigs for loading and unloading injection molding machines, and more specifically, to a jig for loading and unloading of a rotary interchangeable injection molding machine with upper and lower mold cavities. Background Technology

[0002] In the field of injection molding, when producing injection molded parts with a symmetrical structure and a sprue, the traditional process requires embedding diaphragms in the left and right halves of the injection molding machine cavity before injection molding, and then removing the product as a whole after molding.

[0003] Existing technologies typically employ two independent loading fixtures, each equipped with a robotic arm, to place the left and right diaphragms separately. After injection molding, a multi-claw retrieval fixture simultaneously grips the left and right portions of the product for removal. This split-operation method has significant systemic drawbacks: First, the multi-fixture configuration requires corresponding robotic arm operating units, significantly increasing equipment purchase and maintenance costs. Second, the loading and unloading processes must be performed independently and at different times, leading to extended production cycles and limited operational efficiency. This contradiction is particularly pronounced in the application of double-cavity injection molding machines, where the placement of the diaphragm in the upper cavity and the removal of the finished product from the lower cavity must be completed simultaneously. For heavy operations, traditional solutions that increase the number of fixtures will lead to increased equipment complexity and higher operating and maintenance costs. Increasing the number of cycles per operation will significantly extend the production cycle and reduce operational efficiency. More importantly, when the upper and lower mold cavities operate synchronously, the existing fixture system is prone to mechanical interference due to the lack of a spatial coordination mechanism. In particular, when the upper mold film placement mechanism and the lower mold finished product removal device operate simultaneously, conflicts in the fixture movement trajectory may cause equipment damage or production interruption. This technical bottleneck severely restricts the efficiency of dual-mold injection molding machines, and there is an urgent need to develop a new fixture system to overcome the limitations of existing technology. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects in the prior art and provide a jig for loading and unloading materials in a rotary interchangeable injection molding machine with upper and lower mold cavities. Through an integrated structural design, the upper mold cavity diaphragm loading and the lower mold cavity finished product unloading operations are completed simultaneously in a single operation cycle. This effectively solves the technical problems of high equipment cost, low operation efficiency and high risk of motion interference caused by traditional split jigs. It is especially suitable for the high-efficiency collaborative operation requirements of upper and lower mold injection molding machines.

[0005] To address the aforementioned problems, this utility model provides a fixture for loading and unloading materials in a rotary interchangeable injection molding machine with upper and lower dual cavities. The fixture includes a base plate fixed to the actuator end of a robotic arm. The front side of the base plate is provided with a diaphragm loading mechanism, a finished product unloading mechanism, and multiple mold positioning pins corresponding to positioning holes on the mold parting surface of the injection molding machine. The diaphragm loading mechanism includes a set of diaphragm suction mechanisms located on the upper part of the front side of the base plate and a corresponding forward-pushing drive mechanism. The diaphragm suction mechanism is symmetrical about the central axis of the front side of the base plate. The forward-pushing drive mechanism is located between the diaphragm suction mechanism and the base plate and is used to drive the diaphragm suction mechanism to extend and retract linearly in a direction perpendicular to the front side of the base plate. The finished product unloading mechanism includes a sprue clamping mechanism located on the lower part of the front side of the base plate and a set of product clamping mechanisms. The product clamping mechanisms are symmetrical about the central axis of the front side of the base plate and each has multiple product grippers for clamping products at different clamping positions. The sprue clamping mechanism has at least one sprue gripper for clamping the intermediate connecting sprue of the product.

[0006] Compared with the prior art, the advantages of this utility model are as follows: This utility model integrates the film feeding mechanism and the finished product unloading mechanism on the front side of the substrate, and uses circumferentially distributed mold positioning columns to achieve precise positioning of the fixture and mold cavity. This allows a single fixture to simultaneously perform the composite functions of placing the film in the upper mold cavity and removing the product from the lower mold cavity, effectively reducing the number of fixtures and the use of supporting robotic arms, significantly reducing equipment costs and improving operational efficiency. Based on the symmetrically arranged film suction mechanism and product gripping mechanism along the central axis, combined with the vertical telescopic motion mechanism driven by the forward push drive mechanism, it achieves simultaneous execution of precise film embedding and stable product gripping while ensuring no interference in the motion trajectory during synchronous operation of the upper and lower mold cavities, greatly shortening the production cycle. The specially designed sprue gripping mechanism and the synergistic effect of multiple grippers can simultaneously complete the differentiated gripping of the left and right halves of the product and the sprue in a single operation. This avoids the efficiency loss caused by traditional step-by-step operations and prevents product separation damage through independent sprue gripping, thereby improving the operational efficiency of the upper and lower dual-mold injection molding machine while ensuring product molding quality and equipment operational reliability.

[0007] Specifically, the diaphragm suction mechanism includes a mounting base and a contour block. The mounting base is movable forward and backward on the front side of the substrate via a forward-pushing drive mechanism. The contour block is positioned on the front side of the mounting base via a planar adjustment mechanism. The front end of the contour block is recessed to form a contour suction groove that matches the outer contour of the diaphragm. The interior of the contour block has an air channel connecting to an external air source, and the interior of the contour suction groove is connected to the air channel through guide holes. With this structure, the precise matching design between the contour suction groove and the outer contour of the diaphragm, combined with the negative pressure adsorption effect generated by the air channel, ensures that the diaphragm adheres without shifting during suction. The planar adjustment mechanism allows the contour block to be finely adjusted on the mounting base. By adjusting the planar position of the contour block on the mounting base, the planar adjustment mechanism ensures that the contour suction groove precisely corresponds to the diaphragm storage position on the diaphragm supply rack and the diaphragm placement position in the upper mold cavity. This eliminates suction offset or embedding deviation caused by alignment errors between the fixture, the feeding system, and the mold cavity, ensuring consistent diaphragm position during pick-up and drop operations.

[0008] As an improvement, the forward-pushing drive mechanism includes a push cylinder fixed to the center of the substrate and multiple sets of slider rail assemblies located at the four corners of the substrate. The piston rod of the push cylinder is fixedly connected to the mounting base facing forward. The slider of each set of slider rail assemblies is fixedly connected to the substrate, and the rail of each set of slider rail assemblies is fixed to the rear side of the mounting base and extends rearward in a direction perpendicular to the rear side surface of the mounting base. The substrate has through slots through which the rails of the slider rail assemblies pass. With this structure, the push cylinder drive combined with the symmetrically distributed slider rail assemblies forms a multi-point synchronous linear propulsion structure, ensuring stable extension and retraction of the diaphragm suction mechanism in the vertical direction and avoiding skewness or jamming caused by single-point drive. The layout design of the rails passing through the substrate ensures the accuracy of long-stroke linear motion and reduces mechanical wear and extends service life through symmetrical force distribution.

[0009] Specifically, the planar adjustment mechanism includes an extension section, multiple mounting holes extending through the extension section, and multiple threaded holes corresponding to the mounting holes on the front side panel of the mounting base. The extension section is integrally formed on the rear end of the contour block and fits against the front side panel of the mounting base. The mounting holes are circumferentially distributed on the extension section and their diameter is larger than that of the threaded holes. The contour block and the mounting base are fixedly connected by fixing bolts. The fixing bolts have a radial gap and are inserted into the mounting holes and threadedly connected to the threaded holes. After applying this structure, a planar floating adjustment gap is formed by the difference in diameter between the mounting hole and the threaded hole. This allows the contour block to be slightly translated or rotated along the front side of the mounting base during the fixture debugging stage until the contour suction groove and the diaphragm placement position in the upper mold cavity are precisely aligned and locked in place. The circumferentially distributed mounting hole layout ensures the connection rigidity and uniform force distribution between the contour block and the mounting base after adjustment. This avoids the initial positioning deviation caused by traditional rigid fixing and ensures the repeatability of the diaphragm embedding into the mold cavity during batch operations, thereby eliminating the problem of diaphragm offset or embedding failure caused by the misalignment error between the fixture and the mold cavity.

[0010] As an improvement, an ionizing air bar is provided on the front edge of the mounting base, with the air outlet of the ionizing air bar facing the plane where the opening of the contour suction groove is located. With this structure, the ionizing air bar eliminates static electricity on the diaphragm surface by releasing ionized airflow, preventing the diaphragm from attracting dust or shifting due to static electricity, ensuring that the diaphragm surface is clean and its position is stable before being embedded in the mold cavity, while avoiding secondary pollution or efficiency loss caused by traditional wiping cleaning methods. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is the first perspective view of the present invention;

[0013] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0014] Figure 4 This is the second perspective view of the present invention.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Substrate; 11. Mold positioning post; 12. Through groove; 2. Membrane feeding mechanism; 3. Finished product unloading mechanism; 4. Membrane suction mechanism; 41. Mounting base; 42. Contouring block; 421. Contouring suction groove; 4210. Guide hole; 422. Air passage; 5. Forward push drive mechanism; 51. Push cylinder; 52. Slider slide rail assembly; 6. Product clamping mechanism; 60. Product gripper; 7. Sprue clamping mechanism; 70. Sprue gripper; 8. Plane adjustment mechanism; 81. Extension part; 82. Mounting hole; 83. Threaded hole; 9. Ionizing air bar. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] like Figure 1 and Figure 2 As shown, a jig for loading and unloading materials in a rotary interchangeable injection molding machine with upper and lower dual cavities includes a base plate 1 fixed to the actuator end of a robot. The front side of the base plate 1 is provided with a diaphragm loading mechanism 2, a finished product unloading mechanism 3, and multiple mold positioning pins 11 corresponding to positioning holes on the mold closing surface of the injection molding machine. The diaphragm loading mechanism 2 includes a set of diaphragm suction mechanisms 4 located on the upper part of the front side of the base plate 1 and a corresponding forward pushing mechanism 5. The diaphragm suction mechanism 4 is symmetrical about the central axis of the front side of the base plate 1. The forward pushing mechanism 5... The membrane suction mechanism 4 is positioned between the membrane suction mechanism 4 and the substrate 1, and is used to drive the membrane suction mechanism 4 to extend and retract linearly in a direction perpendicular to the front side surface of the substrate 1. The finished product unloading mechanism 3 includes a sprue clamping mechanism 7 and a set of product clamping mechanisms 6 located at the lower part of the front side surface of the substrate 1. The set of product clamping mechanisms 6 is symmetrical about the central axis of the front side surface of the substrate 1, and each has multiple product grippers 60 for clamping products at different clamping positions. The sprue clamping mechanism 7 has at least one sprue gripper 70 for clamping the intermediate connecting sprue of the product.

[0019] This embodiment integrates the film feeding mechanism 2 and the finished product unloading mechanism 3 on the front side of the substrate 1. Combined with circumferentially distributed mold positioning pillars 11, it achieves precise positioning of the fixture and mold cavity. This allows a single fixture to simultaneously perform the combined functions of placing the film in the upper mold cavity and removing the product from the lower mold cavity, effectively reducing the number of fixtures and the use of supporting robotic arms, significantly lowering equipment costs and improving operational efficiency. Based on the symmetrically arranged film suction mechanism 4 and product gripping mechanism 6 along the central axis, combined with the vertical telescopic motion mechanism driven by the forward push drive mechanism 5, it achieves simultaneous execution of precise film embedding and stable product gripping while ensuring no interference in the motion trajectory during synchronous operation of the upper and lower mold cavities, greatly shortening the production cycle. The specially designed sprue gripping mechanism 7, working in conjunction with multiple grippers, can simultaneously complete the differentiated gripping of the left and right halves of the product and the sprue in a single operation. This avoids the efficiency loss caused by traditional step-by-step operations and prevents product separation damage through independent sprue gripping. Therefore, while improving the operational efficiency of the upper and lower dual-mold injection molding machine, it also ensures product molding quality and equipment operational reliability.

[0020] like Figure 2 and Figure 3As shown, the membrane suction mechanism 4 includes a mounting base 41 and a contour block 42. The mounting base 41 is movable back and forth on the front side plate of the substrate 1 by a forward push drive mechanism 5. The contour block 42 is positioned on the front side plate of the mounting base 41 by a planar adjustment mechanism 8. The front end of the contour block 42 is recessed to form a contour suction groove 421 that matches the outer contour of the membrane. The interior of the contour block 42 is provided with an air passage 422 that connects to an external air source. The interior of the contour suction groove 421 is connected to the air passage 422 through a guide hole 4210. After applying this structure, the precise matching design between the contour suction groove 421 and the outer contour of the diaphragm, combined with the negative pressure adsorption effect generated by the air channel 422, ensures that the diaphragm adheres without shifting during the suction process. The plane adjustment mechanism 8 allows the contour block 42 to finely adjust its plane position on the mounting base 41. By adjusting the plane position of the contour block 42 on the mounting base 41, the plane adjustment mechanism 8 ensures that the contour suction groove 421 precisely corresponds to the diaphragm storage position on the diaphragm supply rack and the diaphragm placement position in the upper mold cavity. This eliminates suction offset or embedding deviation caused by alignment errors between the fixture and the feeding system and the mold cavity, ensuring the consistency of the diaphragm position during the pick-up and drop-off operations.

[0021] like Figure 4 As shown, the forward drive mechanism 5 includes a push cylinder 51 fixed to the middle of the substrate 1 and multiple sets of slider rail assemblies 52 arranged at the four corners of the substrate 1. The piston rod of the push cylinder 51 is fixedly connected to the mounting base 41 facing forward. The slider of each set of slider rail assemblies 52 is fixedly connected to the substrate 1. The rail of each set of slider rail assemblies 52 is fixed to the rear side of the mounting base 41 and extends rearward in a direction perpendicular to the rear side plate of the mounting base 41. The substrate 1 is provided with a through groove 12 for the rail of the slider rail assembly 52 to pass through. With this structure, the push cylinder 51 drives the symmetrically distributed slider rail assemblies 52 to form a multi-point synchronous linear propulsion structure, ensuring that the diaphragm suction mechanism 4 can stably extend and retract in the vertical direction, avoiding skew or jamming caused by single-point drive. The layout design of the rails passing through the substrate 1 not only ensures the accuracy of long-stroke linear motion, but also reduces mechanical wear and extends service life through symmetrical force.

[0022] like Figure 3As shown, the planar adjustment mechanism 8 includes an extension 81, a plurality of mounting holes 82 that are provided through the extension 81 from front to back, and a plurality of threaded holes 83 that are provided on the front side plate of the mounting base 41 in a corresponding manner to the mounting holes 82. The extension 81 is integrally formed on the rear end of the contour block 42 and fits against the front side plate of the mounting base 41. The mounting holes 82 are circumferentially distributed on the extension 81 and their diameter is larger than the diameter of the threaded holes 83. The contour block 42 and the mounting base 41 are fixedly connected by fixing bolts. The fixing bolts have a radial gap and are inserted into the mounting holes 82 and threadedly connected to the threaded holes 83. After applying this structure, the planar floating adjustment gap is formed by the difference in diameter between the mounting hole 82 and the threaded hole 83. This allows the contour block 42 to be slightly translated or rotated along the front side of the mounting base 41 during the fixture debugging stage, until the contour suction groove 421 is precisely aligned with the position of the diaphragm in the upper mold cavity and then locked and fixed. The circumferentially distributed mounting hole 82 layout ensures the connection rigidity and uniform force of the contour block 42 and the mounting base 41 after adjustment. This avoids the initial positioning deviation caused by traditional rigid fixing and ensures the repeatability of the diaphragm embedding into the mold cavity during batch operations, thereby eliminating the problem of diaphragm offset or embedding failure caused by the misalignment error between the fixture and the mold cavity.

[0023] like Figure 1 and Figure 2 As shown, the front edge of the mounting base 41 is provided with an ionizing air bar 9, and the air outlet of the ionizing air bar 9 faces the plane where the opening of the contour suction groove 421 is located. After applying this structure, the ionizing air bar 9 eliminates static electricity on the diaphragm surface by releasing ionized airflow, preventing the diaphragm from attracting dust or shifting due to static electricity, ensuring that the diaphragm surface is clean and the position is stable before being embedded in the mold cavity, while avoiding secondary pollution or efficiency loss caused by traditional wiping cleaning methods.

[0024] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A jig for loading and unloading materials in a rotary interchangeable injection molding machine with upper and lower dual cavities, comprising a base plate (1) fixed to the actuator end of a robotic arm, characterized in that: The front side of the substrate (1) is provided with a diaphragm feeding mechanism (2), a finished product unloading mechanism (3), and multiple mold positioning pins (11) corresponding to the positioning holes on the mold closing surface of the injection molding machine. The diaphragm feeding mechanism (2) includes a set of diaphragm suction mechanisms (4) located on the upper part of the front side of the substrate (1) and a corresponding forward driving mechanism (5). The entire set of diaphragm suction mechanisms (4) is symmetrical about the central axis of the front side of the substrate (1). The forward driving mechanism (5) is located between the diaphragm suction mechanism (4) and the substrate (1). The membrane suction mechanism (4) is used to drive the membrane suction mechanism (4) to extend and retract linearly in a direction perpendicular to the front side of the substrate (1). The finished product unloading mechanism (3) includes a sprue clamping mechanism (7) and a set of product clamping mechanisms (6) located at the lower part of the front side of the substrate (1). The set of product clamping mechanisms (6) is symmetrical about the central axis of the front side of the substrate (1) and each has multiple product clamps (60) for clamping the product at different clamping positions. The sprue clamping mechanism (7) has at least one sprue clamp (70) for clamping the intermediate connecting sprue of the product.

2. The fixture used for loading and unloading in a rotary interchangeable injection molding machine with upper and lower dual cavities according to claim 1, characterized in that: The diaphragm suction mechanism (4) includes a mounting base (41) and a contour block (42). The mounting base (41) is movable back and forth on the front side plate of the substrate (1) by the forward push drive mechanism (5). The contour block (42) is disposed on the front side plate of the mounting base (41) by the planar adjustment mechanism (8). The front end of the contour block (42) is recessed to form a contour suction groove (421) that matches the outer contour of the diaphragm. The interior of the contour block (42) is provided with an air passage (422) that connects to an external air source. The interior of the contour suction groove (421) is connected to the air passage (422) through a guide hole (4210).

3. The fixture for loading and unloading materials in a rotary interchangeable injection molding machine with upper and lower dual cavities as described in claim 2, characterized in that: The forward drive mechanism (5) includes a push cylinder (51) fixed in the middle of the base plate (1) and multiple sets of slider rail assemblies (52) arranged at the four corners of the base plate (1). The piston rod of the push cylinder (51) is fixedly connected to the mounting base (41) facing forward. The slider of each set of slider rail assemblies (52) is fixedly connected to the base plate (1). The rail of each set of slider rail assemblies (52) is fixed to the rear side of the mounting base (41) and extends rearward in a direction perpendicular to the rear side plate of the mounting base (41). The base plate (1) is provided with a through groove (12) through which the rail of the slider rail assembly (52) passes.

4. The fixture used for loading and unloading in a rotary interchangeable injection molding machine with upper and lower dual cavities according to claim 2, characterized in that: The planar adjustment mechanism (8) includes an extension (81), a plurality of mounting holes (82) that pass through the extension (81) from front to back, and a plurality of threaded holes (83) that correspond one-to-one with the mounting holes (82) on the front side plate of the mounting base (41). The extension (81) is integrally formed on the rear end of the contour block (42) and fits against the front side plate of the mounting base (41). The mounting holes (82) are circumferentially distributed on the extension (81) and their diameter is larger than the diameter of the threaded holes (83). The contour block (42) and the mounting base (41) are fixedly connected by fixing bolts. The fixing bolts have a radial gap and are inserted into the mounting holes (82) and threadedly connected to the threaded holes (83).

5. The fixture for loading and unloading materials in a rotary interchangeable injection molding machine with upper and lower dual cavities as described in claim 2, characterized in that: The front edge of the mounting base (41) is provided with an ion air bar (9), and the air outlet of the ion air bar (9) faces the plane where the opening of the contour suction groove (421) is located.

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