A side-taking robot for injection molding

Abstract

The present invention discloses a side-taking robot for injection molding in the field of equipment automation technology, comprising a support frame, on which is mounted a robot arm for taking and placing materials for in-mold labeling, and a mounting frame fixedly assembled with the support frame; a storage frame, mounted on the mounting frame, for accommodating in-mold labeling in a vertical state and provided with a discharge port at the end for allowing the in-mold labeling to pass through; a clamping assembly, slidably mounted on the storage frame and equipped with a spring clamping structure; a blocking assembly, mounted on the side of the discharge port, for blocking the in-mold labeling from moving out of the storage frame from the discharge port under the squeezing of the clamping assembly; a force unloading assembly, mounted on the storage frame, for offsetting the constant thrust applied by the clamping assembly and increasing the contact area between the blocking assembly and the in-mold labeling. In the present invention, the displacement and pre-pressure of the in-mold label are controlled by the gravity of the counterweight block. Compared with the cylinder clamping, the structure is simple and compact, no air circuit connection is required, and installation and debugging are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of equipment automation, in particular to a side-taking robot for injection molding. Background Art

[0002] In-mold labeling is mainly used for blow molding and injection molding products made of PP, PE, PET and other materials. Before blow molding and injection molding, the printed in-mold label is placed in the blow molding and injection molding cavity. When the mold is closed for blowing and injection, the special adhesive on the in-mold label is melted by the high temperature and high pressure in the mold and integrated with the surface of the injection molded part. When the mold is opened, the in-mold label is integrated with the surface of the injection molded part to form a beautifully printed product. The in-mold labeling process can improve the hygiene and safety of the packaged products, eliminate the environmental pollution caused by secondary printing and labeling, and is widely used in medical, food and other fields.

[0003] In the traditional in-mold labeling process, the label is grabbed from the side by the side-taking robot before the injection molding machine closes the mold and then placed in the appropriate position in the mold; in batch injection molding, the injection molding production cycle is very short, so it is necessary to place the labels in a convenient position for the side-taking robot in advance to facilitate the side-taking robot to quickly and frequently pick up and place them; the existing labels are squeezed into the predetermined track of the label by cylinder compression, and the displacement of the label is controlled by the cylinder to fill the position of the label. At the same time, the pressure on the label is controlled to ensure that the label does not fall off, so that the side-taking robot can take it out from the predetermined track; since the thickness of a single label is very thin, the cylinder needs to accurately control the extension and pre-pressure, and the realization of precise control of the cylinder requires the combination of many high-precision controllers and sensors. High-precision controllers and sensors are not only expensive, but also easily affected by the high temperature in the mold and fail, resulting in the label being over-squeezed by the cylinder and unable to be taken out or the label being too loose and falling, affecting the normal progress of the injection molding work. Summary of the invention

[0004] The technical problem of the present invention is to provide a side-taking robot for injection molding.

[0005] To achieve the above object, the present invention provides the following technical solution: a side-taking robot for injection molding, comprising a support frame, on which a robot arm for taking and placing in-mold labels is installed,

[0006] a mounting frame fixedly assembled with the support frame;

[0007] A storage rack is installed on the mounting rack, used to accommodate the in-mold labels in a vertical state and has an outlet at the end thereof for allowing the in-mold labels to pass through;

[0008] A clamping assembly is slidably mounted on the storage rack and is equipped with a spring clamping structure; it is used to apply a constant thrust to the spring clamping structure so that the spring clamping structure presses against the in-mold label;

[0009] A blocking component is installed on the side of the discharge port, and is used to prevent the in-mold label from moving out of the storage rack from the discharge port under the pressure of the pressing component;

[0010] The force unloading component is installed on the storage rack to offset the constant thrust applied by the pressing component and increase the contact area between the blocking component and the in-mold label.

[0011] As a further solution of the present invention, the storage rack further includes:

[0012] The mounting plate is mounted on the side wall of the mounting frame, and the discharge port is opened in the middle of the mounting plate;

[0013] The tail plate is arranged parallel to the mounting plate;

[0014] A carrier, used to connect the mounting plate and the tail plate, and to carry the in-mold label stored between the mounting plate and the tail plate;

[0015] A limiting rod is installed on the side wall of the mounting plate and is located above the carrier, and is used for limiting the position above the in-mold label;

[0016] As a further solution of the present invention, the pressing assembly comprises:

[0017] A pressing slider is slidably assembled on the bearing member and is equipped with a spring pressing structure;

[0018] The counterweight assembly is fixedly connected to the pressing slider and is used to convert gravity into a constant thrust that causes the pressing slider to move toward the mounting plate.

[0019] As a further solution of the present invention, the counterweight assembly includes a cable, one end of which is fixedly connected to the clamping slider, and the other end is fixedly connected to the counterweight block. The cable passes through a guide wheel so that the horizontal section of the cable is parallel to the moving path of the clamping slider.

[0020] As a further solution of the present invention, the blocking component comprises:

[0021] Two limit plates are respectively installed at the top and bottom of the discharge port and their ends extend into the discharge port.

[0022] As a further solution of the present invention, at least two more limit plates are provided and installed respectively on the left and right sides of the discharge port, and the ends of the limit plates extend into the discharge port.

[0023] As a further solution of the present invention, an adjustment groove is provided in the middle of the limit plate, and a connecting piece for limiting the position of the limit plate is provided in the adjustment groove.

[0024] As a further solution of the present invention, the force unloading assembly includes a blocking member and a contact rod fixedly connected to the clamping slider, the blocking member is slidably connected to the mounting plate in the vertical direction, a guide rod and a limit groove are provided on the blocking member, the guide rod is used to act on the contact rod in a moving state to move the blocking member upward, and the limit groove is used to clamp and prevent the contact rod from moving; a linkage mechanism is connected to the end of the blocking member away from the guide rod, and the linkage mechanism is used to drive the limit plates located at the top and bottom positions of the discharge port to move toward each other at the same time when the blocking member moves upward.

[0025] As a further solution of the present invention, the force unloading assembly also includes a limit frame arranged between the linkage mechanism and the blocking member, a limit block is fixedly provided in the limit frame for limiting the distance that the blocking member penetrates into the limit frame, an adjustment plate and a locking member for adjusting the position of the adjustment plate are slidably arranged in the limit frame, an elastic structure is fixedly provided between the adjustment plate and the blocking member located at the inner side end of the limit frame, and the locking member is installed in the limit frame through a locking nut.

[0026] As a further solution of the present invention, the linkage mechanism includes a synchronous gear rotatably arranged in the mounting plate, the inner and outer sides of the synchronous gear are meshed with transmission racks slidably assembled with the mounting plate, buffer springs are fixed to the bottom of the transmission rack located on the inner side of the synchronous gear and the top of the transmission rack located on the outer side of the synchronous gear, the two buffer springs are connected to a transmission slide rod horizontally arranged and slidably assembled with the mounting plate, and the two transmission slide rods are respectively connected to the two limit plates.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the present invention, when there are a large number of in-mold labels, the deformation amplitude of the in-mold labels as a whole under a fixed pressure is small, the limit plates at the upper and lower ends remain stationary, and the in-mold labels are fixed by the gravity of the counterweight block itself, which can prevent the in-mold labels from falling off. Due to the gaps between the in-mold labels and their own gravity and other factors, part of the pressure will be dispersed, so that the pressure on the in-mold labels is gradually reduced, making it easier for the first in-mold label to be taken out.

[0029] 2. In the present invention, when the number of in-mold labels is small, the deformation amplitude of the overall in-mold labels under a fixed pressure is large. The clamping slider is limited by the unloading component to offset part of the pressure caused by the gravity of the counterweight block, reduce the pressure on the in-mold labels, and thus reduce the deformation of the in-mold labels; the reset spring sends the remaining in-mold labels to the limiting plate by extending. As the number of in-mold labels decreases, the pressure applied by the reset spring to the in-mold labels through the in-mold label pressure column is further reduced. When there are a small number of terminal in-mold labels, the remaining in-mold labels can be prevented from being subjected to excessive pressure and unable to be taken out from between the limiting plate and the in-mold label pressure column. At the same time, the limiting plate approaches the axis of the in-mold label pressure column until the label enters the front of the forward trajectory of the label pressure column, so that the last one or several labels are not squeezed out and can remain in a fully expanded state, thereby avoiding label wrinkles and affecting product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the mounting frame and its connection relationship structure of the present invention;

[0033] Figure 3 For the present invention Figure 2 The enlarged structural diagram at C in the middle;

[0034] Figure 4 It is a schematic diagram of the cross-sectional structure of the mounting frame of the present invention and its connection relationship;

[0035] Figure 5 For the present invention Figure 4 The enlarged structural diagram at D in the middle;

[0036] Figure 6 A schematic diagram of the thickness change and stress condition of the in-mold label of the present invention;

[0037] Figure 7 This is a schematic diagram of the motion state of the pressing slider of the present invention;

[0038] Figure 8 For the present invention Figure 7 Schematic diagram of the motion state at F in the middle;

[0039] Fig. 9 It is a schematic diagram of a partial cross-sectional structure of the standard mounting frame of the present invention;

[0040] Fig.10 For the present invention Fig. 9 The enlarged structural diagram at E in the middle;

[0041] Fig.11 It is a schematic diagram of the feeding sliding mechanism and its connection relationship structure of the present invention;

[0042] Fig.12 It is a schematic diagram of the cross-sectional structure of the feeding sliding mechanism of the present invention;

[0043] Fig.13 For the present invention Fig.12 The enlarged structural diagram at A in the middle;

[0044] Fig.14 For the present invention Fig.12 Enlarged structural diagram at B in the middle.

[0045] Reference numerals:

[0046] 1. Support frame; 11. Extension frame;

[0047] 21. Mounting rack; 22. Storage rack; 221. Mounting plate; 222. Carrying member; 223. Tail plate; 224. Limit rod; 225. Discharging port; 23. Pressing slide block; 24. Return spring; 25. Label pressing column; 26. Cable; 27. Guide wheel; 28. Counterweight;

[0048] 3. Limiting plate; 31. Adjusting slot; 32. Connecting piece;

[0049] 4. force unloading assembly; 41. limit frame; 42. blocking member; 421. limit groove; 422. guide rod; 43. contact rod; 44. elastic structure; 45. adjustment plate; 46. locking member; 47. locking nut; 48. limit block;

[0050] 5. linkage mechanism; 51. transmission slide bar; 52. transmission rack; 53. synchronous gear; 54. connecting plate; 55. buffer spring;

[0051] 6. Feeding sliding mechanism; 61. First linear slide mechanism; 62. Feeding carriage; 63. Active synchronous wheel; 64. Driven synchronous wheel; 65. Feeding motor; 66. Synchronous belt;

[0052] 7. Material picking sliding mechanism; 71. Base; 72. Second linear slide rail mechanism; 73. Material picking slide; 74. Material picking rack; 75. Material picking gear; 76. Material picking motor;

[0053] 8. Telescopic parts;

[0054] 9. Height adjustment structure; 91. Fixed block; 92. Push rod. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] See also Figure 1-Figure 14 , the present invention provides a technical solution: a side-taking robot for injection molding, comprising a support frame 1, a robot arm for taking and placing in-mold labels is installed on the support frame 1, and a mounting frame 21 fixedly assembled with the support frame 1;

[0057] The storage rack 22 is mounted on the mounting rack 21 and is used to accommodate the in-mold labels in a vertical state and has an outlet 225 at the end thereof for the in-mold labels to pass through;

[0058] A clamping assembly is slidably mounted on the storage rack 22 and is provided with a spring clamping structure; it is used to apply a constant thrust to the spring clamping structure so that the spring clamping structure presses against the in-mold label;

[0059] A blocking component is installed at the side of the discharge port 225 to prevent the in-mold label from moving out of the storage rack 22 from the discharge port 225 under the pressure of the pressing component;

[0060] The force unloading assembly 4 is mounted on the storage rack 22 and is used to offset the constant thrust applied by the pressing assembly and increase the contact area between the blocking assembly and the in-mold label;

[0061] Specifically, the clamping component presses the in-mold label through the spring clamping structure and accumulates force in the spring clamping structure. The robotic arm takes out the in-mold labels one by one from the discharge port 225. As the number of in-mold labels decreases, the deformation amplitude of the in-mold label under the overall constant pressure gradually increases. Before the in-mold label is deformed and is about to pass the blocking component, the unloading component 4 offsets the overall deformation of the in-mold label and the constant thrust applied by the clamping component by increasing the contact area with the in-mold label. The spring clamping structure gradually releases the elastic force and pushes the remaining in-mold labels to move toward the discharge port 225. The remaining elastic force of the spring clamping structure is proportional to the number of remaining in-mold labels, that is, the fewer the number of remaining in-mold labels, the smaller the remaining elastic force of the spring clamping structure, and the smaller the deformation degree of the remaining in-mold labels, thereby preventing the in-mold labels from being excessively deformed and detaching from the blocking component and falling from the discharge port 225, causing some in-mold labels to be unusable.

[0062] The storage rack 22 includes:

[0063] The mounting plate 221 is mounted on the side wall of the mounting frame 21, and the discharge port 225 is opened in the middle thereof;

[0064] The tail plate 223 is arranged parallel to the mounting plate 221;

[0065] The carrier 222 is used to connect the mounting plate 221 and the tail plate 223, and to carry the in-mold label stored between the mounting plate 221 and the tail plate 223;

[0066] The limiting rod 224 is installed on the side wall of the mounting plate 221 and is located above the carrier 222 for limiting the position above the in-mold label.

[0067] Specifically, the space formed between the mounting plate 221, the carrier 222 and the tail plate 223 can store the label, and the inner side wall of the carrier 222 can be tangent to the discharge port 225 to prevent the label edge from being scratched when the label enters the discharge port 225, resulting in damage to the label edge, thereby affecting the quality of the product;

[0068] The limiting rod 224 can press the label slightly higher than the top of the discharge port 225 back to the predetermined track, that is, it can completely enter the discharge port 225, thereby preventing the top of the label from bending after entering the discharge port 225, thereby affecting the quality of the product.

[0069] The clamping assembly includes:

[0070] The pressing slider 23 is slidably assembled on the bearing member 222 and is equipped with a spring pressing structure; the spring pressing structure includes a label pressing column 25 slidably arranged with the pressing slider 23, and the label pressing column 25 is connected to the pressing slider 23 via a return spring 24;

[0071] The counterweight assembly is fixedly connected to the pressing slider 23 and is used to convert gravity into a constant thrust that moves the pressing slider 23 toward the mounting plate 221 .

[0072] Move the clamping slider 23 to create a sufficient distance between the clamping slider 23 and the mounting plate 221, and place the in-mold label to be used between the clamping slider 23 and the mounting plate 221. Release the clamping slider 23, and the counterweight 28 naturally falls down under the action of gravity, and drives the clamping slider 23 to move. The clamping slider 23 squeezes the in-mold label between the blocking assembly and the clamping slider 23 with a constant thrust, so that the in-mold label remains constant and fixed.

[0073] The counterweight assembly includes a cable 26 , one end of which is fixedly connected to the clamping slider 23 , and the other end of which is fixedly connected to a counterweight block 28 . The cable 26 passes through a guide wheel 27 so that the horizontal section of the cable 26 is parallel to the moving path of the clamping slider 23 .

[0074] The counterweight block 28 is suspended and can convert gravity into a constant thrust for the pressing slider 23 to push the in-mold label through the cable 26, so that the in-mold label maintains a constant force.

[0075] The blocking components include:

[0076] Two limit plates 3 are respectively installed at the top and bottom of the discharge port 225 and ends of the two limit plates 3 extend into the discharge port 225 .

[0077] At least two more limit plates 3 are provided, which are respectively installed on the left and right sides of the discharge port 225 and the ends of the limit plates extend into the discharge port 225; the in-mold label can be blocked from multiple positions, reducing the force and blocking depth of a single position, and facilitating the removal of the in-mold label.

[0078] An adjusting slot 31 is provided in the middle of the limiting plate 3 , and a connecting piece 32 for limiting the position of the limiting plate 3 is provided in the adjusting slot 31 .

[0079] The distance between the inner sections of the limiting plates 3 can be adjusted by the connecting piece 32, that is, the size of the opening for taking out the in-mold label can be adjusted. If the in-mold label is tough, the distance between the limiting plates 3 can be increased, and vice versa. This can prevent the in-mold label with high toughness from being difficult to take out or from being excessively bent when taken out, leaving scratches, affecting the quality of the product, and also prevent the in-mold label with low toughness from being excessively bent when squeezed, causing the in-mold label to pass over the limiting plate 3 and fall from the discharge port 225; so that it can limit the in-mold labels with different toughness.

[0080] The unloading assembly 4 includes a blocking member 42 and a contact rod 43 fixedly connected to the clamping slider 23. The blocking member 42 is slidably connected to the mounting plate 221 in the vertical direction. A guide rod 422 and a limit groove 421 are provided on the blocking member 42. The guide rod 422 is used to act on the moving contact rod 43 to move the blocking member 42 upward, and the limit groove 421 is used to clamp and prevent the contact rod 43 from moving; the end of the blocking member 42 away from the guide rod 422 is connected to a linkage mechanism 5, and the linkage mechanism 5 is used to drive the limit plates 3 located at the top and bottom positions of the discharge port 225 to move toward each other at the same time when the blocking member 42 moves upward.

[0081] The force unloading assembly 4 also includes a limit frame 41 arranged between the linkage mechanism 5 and the blocking member 42, a limit block 48 is fixedly arranged in the limit frame 41 for limiting the distance that the blocking member 42 penetrates into the limit frame 41, an adjustment plate 45 and a locking member 46 for adjusting the position of the adjustment plate 45 are slidably arranged in the limit frame 41, an elastic structure 44 is fixedly arranged between the adjustment plate 45 and the blocking member 42 located at the inner side end of the limit frame 41, and the locking member 46 is installed in the limit frame 41 through a locking nut 47.

[0082] For details, see Fig. 9 and Fig.10 When the guide rod 422 contacts the contact rod 43, the guide rod 422 drives the limit frame 41 to rise through the blocking member 42, so that the upper and lower limit plates 3 are brought closer to each other, reducing the deformation of the end in-mold label and preventing the in-mold label from being squeezed out;

[0083] When the contact rod 43 enters the limiting groove 421, the blocking member 42 moves with the contact rod 43, and the blocking member 42 squeezes the elastic structure 44. The elastic structure 44 applies a reverse thrust to the limiting plate 3 through the blocking member 42 and the contact rod 43, thereby offsetting the pressure of the weight block 28 on the in-mold label, reducing the pressure of the weight block 28 on the removal of the in-mold label at the end, and facilitating the removal of the in-mold label at the end;

[0084] Moving the adjustment plate 45 can compress the elastic structure 44, increasing the pre-pressure of the elastic structure 44, thereby increasing the difficulty and pressure of moving the blocking member 42, increasing the value of the pressure on the in-mold label caused by the gravity of the counterweight block 28, and further reducing the pressure of the gravity of the counterweight block 28 on the removal of the terminal in-mold label, thereby facilitating the removal of the terminal in-mold label.

[0085] The linkage mechanism 5 includes a synchronous gear 53 rotatably arranged in the mounting plate 221, and the inner and outer sides of the synchronous gear 53 are meshed with transmission racks 52 slidably assembled with the mounting plate 221. Buffer springs 55 are fixed to the bottom of the transmission rack 52 located on the inner side of the synchronous gear 53 and the top of the transmission rack 52 located on the outer side of the synchronous gear 53. The two buffer springs 55 are connected to a transmission slide rod 51 which is horizontally arranged and slidably assembled with the mounting plate 221. The two transmission slide rods 51 are respectively connected to the two limit plates 3.

[0086] For details, see Figure 4 and Figure 5 When the unloading assembly 4 rises, the limit frame 41 drives one of the transmission racks 52, i.e., the transmission rack 52 at the bottom, to rise through the connecting plate 54. The transmission rack 52 drives the other transmission rack 52 to move in the opposite direction through the synchronous gear 53. The transmission rack 52 drives the transmission slide bar 51 to move in the opposite direction. The transmission slide bar 51 drives the limit plates 3 at the upper and lower ends to move in the opposite direction, i.e., approach each other, thereby reducing the deformation degree of the terminal in-mold label and preventing the in-mold label from being extruded.

[0087] The robot arm includes a support frame 1, a feeding sliding mechanism 6, a picking sliding mechanism 7, and an extension frame 11. The support frame 1 is provided with a first linear slide rail mechanism 61, the feeding sliding mechanism 6 is installed on the support frame 1 through the first linear slide rail mechanism 61, the feeding sliding mechanism 6 is provided with a second linear slide rail mechanism 72, the picking sliding mechanism 7 is installed on the feeding sliding mechanism 6 through the second linear slide rail mechanism 72, and the extension frame 11 is installed on the picking sliding mechanism 7 through a fixing plate;

[0088] The material taking sliding mechanism 7 is used to drive the extension frame 11 to move in the opposite direction along the second linear slide rail mechanism 72, so that the extension frame 11 can take out the in-mold label from the material outlet 225 or put the in-mold label into the mold. The end of the extension frame 11 needs to be installed with the device for taking out the in-mold label in advance;

[0089] The feeding slide mechanism 6 is used to drive the material taking slide mechanism 7 to move along the first linear slide mechanism 61, so that the end of the extension frame 11 on the material taking slide mechanism 7 is extended into the mold, so as to facilitate the taking of materials and the placement of labels;

[0090] In summary, see Figure 6-Figure 8 Before the clamping slider 23 is limited by the unloading assembly 4, as the extension frame 11 (with a manipulator for taking out the in-mold label installed at the end, including but not limited to a suction cup and a clamp) continuously takes out the in-mold label from the storage rack 22, the counterweight 28 gradually falls down, and the clamping slider 23 gradually approaches the limiting plate 3. During this process, the force applied to the in-mold label is the S1 horizontal section, and the pressure applied to the in-mold label is only the gravity of the counterweight 28; when the clamping slider 23 contacts the guide rod 422, the clamping slider 23 drives the unloading assembly 422 to release the force. As the assembly 4 rises, the unloading assembly 4 drives the limit plates 3 at the upper and lower ends to approach each other through the linkage mechanism 5, that is, to approach the axis of the label pressure column 25. During this process, the force applied to the label is the S1 tilting section, and the gravity influence of the counterweight block 28 on the label gradually decreases. At the same time, the pressure of the limit plates 3 at the upper and lower ends on the in-mold label gradually increases (or the limit depth of the limit plates 3 at the upper and lower ends increases), which is the S2 tilting section. Since the label is squeezed by the label pressure column 25, a certain curvature will appear. As the unloading assembly 4 rises, the buffer spring 55 The limit plate 3 contracts slightly, so that the force exerted by the limit plate 3 on the in-mold label gradually increases; when the contact rod 43 of the side wall of the pressing slider 23 contacts the limit groove 421, the force of the counterweight block 28 on the in-mold label is completely offset by the unloading component 4, and the unloading component 4 no longer drives the limit plates 3 at the upper and lower ends to move, and the pressure of the limit plate 3 on the in-mold label remains constant. At the same time, as the in-mold label gradually decreases, the overall flexibility of the in-mold label weakens, the reset spring 24 gradually stretches, and is applied to the label through the label pressure column 25. As the reset spring 24 is As the spring 24 is extended, the pressure applied by the label pressing column 25 on the label gradually decreases, which is S3. In this process, the pressing slider 23 drives the unloading assembly 4 to rise through the guide rod 422, and the unloading assembly 4 drives the limit plates 3 at the upper and lower ends to approach through the linkage mechanism 5, thereby increasing the limit depth of the upper and lower ends of the in-mold label, until the pressing slider 23 is completely limited by the unloading assembly 4, and the inner side end of the limit plate 3 is at the same height as the label pressing column 25 on the same side, so that the last one or several in-mold labels can be prevented from being completely squeezed and falling off.

[0091] In summary, when there are a large number of in-mold labels, the deformation amplitude of the in-mold labels as a whole under a fixed pressure is small, the limit plates 3 at the upper and lower ends remain stationary, and the counterweight block 28 maintains a constant pressure on the in-mold labels, which can prevent the in-mold labels from falling off. The gaps in the in-mold labels and their own gravity will disperse part of the pressure, so that the pressure on the first in-mold label is moderate, which facilitates the removal of the first in-mold label.

[0092] When the number of in-mold labels is small, the deformation amplitude of the in-mold labels as a whole under a fixed pressure is large. The pressure relief component 4 is used to limit the pressing slider 23 to offset the pressure caused by part of the gravity of the counterweight block 28, reduce the pressure on the in-mold labels, and thus reduce the deformation of the in-mold labels. At the same time, the pre-pressure of the upper and lower limit plates 3 is increased. The limit plates 3 are slightly brought together, which can increase the contact depth of the first in-mold label and reduce the deformation of the in-mold label, thereby ensuring that the overall in-mold label remains in a clamped state and the first in-mold label is not ejected.

[0093] At the end of the in-mold label, the reset spring 24 extends to send the remaining in-mold labels to the limiting plate 3. As the number of in-mold labels continues to decrease, the pressure applied by the reset spring 24 to the in-mold labels through the label pressing column 25 is further reduced. When there are a small number of end in-mold labels, the remaining in-mold labels can be prevented from being subjected to excessive pressure and unable to be taken out from between the limiting plate 3 and the label pressing column 25. At the same time, the limiting plate 3 approaches the axis of the label pressing column 25 until the in-mold label enters in front of the forward trajectory of the label pressing column 25, so that the last one or several in-mold labels are not squeezed out and can remain in a fully expanded state, thereby avoiding wrinkles in the in-mold labels and affecting the quality of the product.

[0094] As a further solution of the present invention, the feeding sliding mechanism 6 comprises:

[0095] A first linear slide mechanism 61 is mounted on the support frame 1;

[0096] A feeding slide 62 is slidably disposed on the first linear slide rail mechanism 61;

[0097] An active synchronous wheel 63, a driven synchronous wheel 64, and a feeding motor 65 are installed on the support frame 1; a synchronous belt 66 is connected between the active synchronous wheel 63 and the driven synchronous wheel 64, the output shaft of the feeding motor 65 is connected to the active synchronous wheel 63, and the feeding slide 62 is installed on the synchronous belt 66;

[0098] Specifically, the feeding motor 65 drives the active synchronous wheel 63 to rotate, and the active synchronous wheel 63 and the driven synchronous wheel 64 drive the feeding slide 62 to move along the first linear slide mechanism 61 through the synchronous belt 66, and the feeding slide 62 drives the material picking sliding mechanism 7 to move into the mold, thereby facilitating the removal of the mold and the transportation of the label.

[0099] During operation, the material taking sliding mechanism 7 should also be cooperated with to work, and the material taking sliding mechanism 7 includes:

[0100] A base 71 is mounted on the feeding slide mechanism 6;

[0101] A second linear slide mechanism 72 is mounted on the base 71;

[0102] The material taking slides 73 are arranged in pairs and are both mounted on the second linear slide rail mechanism 72. The extension frame 11 is mounted on the material taking slides 73. The manipulator adapted to the working requirements is mounted on the extension frame 11.

[0103] The material taking racks 74 are arranged in pairs and are respectively mounted on the corresponding material taking slides 73;

[0104] The material taking gear 75 is meshed with the material taking rack 74 and is mounted on the base 71;

[0105] The material taking motor 76, the output shaft is coaxially mounted with the material taking gear 75;

[0106] Specifically, the material picking motor 76 drives the material picking rack 74 to move in the reverse direction through the material picking gear 75, the material picking rack 74 drives the material picking slide 73 to move in the reverse direction, the material picking slide 73 drives the extension frame 11 to move in the reverse direction, and the manipulator adapted to the working requirements installed on the extension frame 11 is adapted to the subsequent picking of plastic parts and the delivery of labels.

[0107] In addition, the storage rack 22 is slidably arranged on the mounting rack 21, and a height adjustment structure 9 is arranged between the storage rack 22 and the mounting rack 21, and the height adjustment structure 9 is used to adjust the height of the storage rack 22, and a telescopic member 8 is arranged between the feeding sliding mechanism 6 and the picking sliding mechanism 7; the height adjustment structure 9 includes: a fixed block 91 fixed on the mounting rack 21, and the fixed block 91 is threadedly connected with a push rod 92;

[0108] Specifically, by rotating the push rod 92, the length of the top of the push rod 92 extending out of the fixed block 91 can be adjusted. The push rod 92 can adjust the height of the mounting frame 21 by pushing the mounting frame 21 upward. At the same time, the telescopic part 8 can adjust the height of the material removal sliding mechanism 7 and the extension frame 11, so that labels can be placed on molds of different heights.

Claims

1. A side-taking robot for injection molding, comprising a support frame (1), on which is mounted a robot arm for taking and placing materials for in-mold labeling, characterized in that: A mounting frame (21) fixedly assembled with the support frame (1); A storage rack (22) is mounted on the mounting rack (21), and is used to accommodate the in-mold label in a vertical state, and an end portion is provided with a discharge port (225) through which the in-mold label can pass; A clamping assembly is slidably mounted on the storage rack (22) and is provided with a spring clamping structure; it is used to apply a constant thrust to the spring clamping structure so that the spring clamping structure presses against the in-mold label; A blocking component, installed on the side of the discharge port (225), used to prevent the in-mold label from moving out of the storage rack (22) from the discharge port (225) under the pressure of the pressing component; A force relief assembly (4) mounted on the storage rack (22) for offsetting the constant thrust applied by the pressing assembly and increasing the contact area between the blocking assembly and the in-mold labeling; The blocking assembly comprises: Two limit plates (3), the two limit plates (3) being respectively installed at the top and bottom of the discharge port (225) and having ends extending into the discharge port (225); The unloading assembly (4) comprises a blocking member (42) and a contact rod (43) fixedly connected to the pressing slide block (23); the blocking member (42) is slidably connected to the mounting plate (221) in the vertical direction; a guiding rod (422) and a limiting groove (421) are provided on the blocking member (42); the guiding rod (422) is used to act on the moving contact rod (43) to move the blocking member (42) upward; the limiting groove (421) is used to clamp and prevent the contact rod (43) from moving; the end of the blocking member (42) away from the guiding rod (422) is connected to a linkage mechanism (5); the linkage mechanism (5) is used to drive the limiting plates (3) located at the top and bottom positions of the discharge port (225) to move towards each other simultaneously when the blocking member (42) moves upward; The unloading assembly (4) further comprises a limit frame (41) arranged between the linkage mechanism (5) and the blocking member (42); a limit block (48) is fixedly arranged in the limit frame (41) for limiting the distance that the blocking member (42) penetrates into the limit frame (41); an adjustment plate (45) and a locking member (46) for adjusting the position of the adjustment plate (45) are slidably arranged in the limit frame (41); an elastic structure (44) is fixedly arranged between the adjustment plate (45) and the blocking member (42) located at the inner side ends of the limit frame (41); and the locking member (46) is installed in the limit frame (41) via a locking nut (47); The linkage mechanism (5) comprises a synchronous gear (53) rotatably arranged in the mounting plate (221); the inner side and the outer side of the synchronous gear (53) are meshed with a transmission rack (52) slidably assembled with the mounting plate (221); a buffer spring (55) is fixed to the bottom of the transmission rack (52) located inside the synchronous gear (53) and the top of the transmission rack (52) located outside the synchronous gear (53); the two buffer springs (55) are connected to a transmission slide bar (51) arranged horizontally and slidably assembled with the mounting plate (221); and the two transmission slide bars (51) are respectively connected to the two limit plates (3).

2. The side-taking robot for injection molding according to claim 1, characterized in that: The storage rack (22) further comprises: A mounting plate (221) is mounted on a side wall of the mounting frame (21), and a discharge port (225) is provided in the middle thereof; A tail plate (223) is arranged in parallel with the mounting plate (221); A carrier (222) is used to connect the mounting plate (221) and the tail plate (223), and to carry the in-mold label stored between the mounting plate (221) and the tail plate (223); The limiting rod (224) is mounted on the side wall of the mounting plate (221) and is located above the carrier (222) and is used for limiting the position above the in-mold label.

3. The side-taking robot for injection molding according to claim 1, characterized in that: The clamping assembly comprises: A pressing slider (23) is slidably mounted on the bearing member (222) and is provided with a spring pressing structure; The counterweight assembly is fixedly connected to the pressing slider (23) and is used to convert gravity into a constant thrust that causes the pressing slider (23) to move in a direction close to the mounting plate (221).

4. The side-taking robot for injection molding according to claim 3, characterized in that: The counterweight assembly comprises a cable (26), one end of the cable (26) being fixedly connected to the pressing slider (23), and the other end of the cable being fixedly connected to a counterweight block (28). The cable (26) passes through a guide wheel (27) so that a horizontal section of the cable (26) is parallel to a moving path of the pressing slider (23).

5. The side-taking robot for injection molding according to claim 1, characterized in that: At least two more limit plates (3) are provided and are respectively installed on the left and right sides of the discharge port (225), and the ends of the limit plates extend into the discharge port (225).

6. The side-taking robot for injection molding according to claim 5, characterized in that: An adjustment groove (31) is provided in the middle of the limit plate (3), and a connecting piece (32) for limiting the position of the limit plate (3) is provided in the adjustment groove (31).

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