Disclosure of Invention
The invention provides an in-mould labeling method and an in-mould labeling injection system, which can solve the problems that in the prior art, workpiece taking and labeling cannot be carried out simultaneously and the working efficiency is low.
A method of in-mold labeling comprising:
step S1: a mechanical arm of the picking and labeling machine extends between the fixed template and the movable template;
step S2: detecting whether a first ejector pin assembly arranged on the movable template is retracted to an initial position or not; if yes, go to step S3; if not, the controller sends an alarm working instruction;
step S3: the part taking and labeling mechanical arm is used for placing a label in a mold of the movable mold plate, the second ejector pin component arranged on the fixed mold plate is ejected out, the injection molding part is ejected out to the part taking and labeling mechanical arm, and the part taking and labeling mechanical arm is used for grabbing the injection molding part.
Step S0.2 is also provided before step S1, where step S0.2 specifically includes: and (3) opening the mold of the injection molding machine, enabling the movable mold plate to deviate from the fixed mold plate to move under the driving of the mold locking driving device, and ejecting the injection molding piece to the fixed mold plate by a first ejector pin assembly arranged on the movable mold plate under the driving of a first ejection driving piece.
Step S4 is further provided after step S3, where step S4 is specifically that the pick-up and attachment mechanical arm retracts, the second ejection driving unit drives the second ejector pin assembly to retract, the mold locking driving unit drives the movable mold plate to move toward the fixed mold plate until the movable mold plate and the fixed mold plate are attached, and the injection molding machine performs injection and repeats steps S0.2 to S3.
Step S0.1 is also provided before step S0.2, and step S0.1 specifically includes: the controller identifies the current operating mode, and if the current operating mode is the first thimble assembly and the second thimble assembly linkage mode, the steps S0.2 to S4 are executed.
The initial position is the position when the first ejector pin component is not ejected out of the movable template.
The invention also provides an in-mold label injection molding system, which comprises: the automatic part taking and labeling machine comprises an injection molding machine, a part taking and labeling mechanical arm and a controller;
the injection molding machine comprises a movable mold plate, a fixed mold plate, a mold locking driving device, a first ejection mechanism arranged on the movable mold plate and a second ejection mechanism arranged on the fixed mold plate;
the first ejection mechanism comprises a first ejection driving piece, a first ejector pin plate and a first ejector pin assembly, and the first ejector pin assembly is connected to the first ejector pin plate;
the second ejection mechanism comprises a second ejection driving part and a second ejector pin component;
the part taking and labeling mechanical arm, the mold locking driving device, the first ejection driving part and the second ejection driving part are electrically connected with the controller.
The first ejection driving piece is also provided with a position sensor, the position sensor is electrically connected with the controller, and the position sensor is used for detecting whether the first ejector pin assembly is returned to the initial position or not;
when the position sensor detects that the first ejector pin assembly is returned to the initial position, the controller sends an ejection working instruction to the second ejection driving piece and sends a picking and labeling working signal to a picking and labeling mechanical arm; the second ejection driving part drives the second ejector pin assembly to eject the injection molding part to the part taking and labeling mechanical arm according to the working instruction; and the mechanical arm for picking and labeling the injection molding piece places the label in the mold of the movable mold plate according to the working signal and grabs the injection molding piece.
The in-mold labeling injection molding system is also provided with an alarm device, and the alarm device is electrically connected with the controller; when the position sensor does not detect that the first ejector pin assembly is retracted to the initial position within the set time, the controller sends an alarm working instruction to the alarm device.
According to the in-mold labeling method, the ejection of the first ejection mechanism and the mold opening are simultaneously carried out, the injection molding part is ejected to the fixed mold plate side, so that the part taking and labeling mechanical arm can carry out labeling on the fixed mold plate side and taking on the fixed mold plate side, the actions on the two sides can be simultaneously carried out, the working period of the injection molding machine is shortened, and the working efficiency is improved. Meanwhile, the first ejection mechanism on the side of the movable die plate, the second ejection mechanism on the side of the fixed die plate and the picking and labeling mechanical arm are linked, so that the first ejector pin assembly is returned when the picking and labeling mechanical arm performs labeling and picking actions, and the first ejector pin assembly can be prevented from colliding with the picking and labeling mechanical arm.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two. The words "if," if, "and" if, "as used herein, may be interpreted as" when an. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention relates to an in-mold labeling injection molding system, which comprises: the injection molding machine comprises a movable mold plate 1, a fixed mold plate 2, a mold locking driving device 3, a first ejection mechanism arranged on the movable mold plate 1 and a second ejection mechanism arranged on the fixed mold plate 2, as shown in figure 1;
the first ejection mechanism comprises a first ejection driving element 41, a first ejector pin plate 43 and a first ejector pin assembly 42, and the first ejector pin assembly 42 is connected to the first ejector pin plate 43;
the second ejection mechanism comprises a second ejection driving element 51 and a second ejector pin assembly 52, and the second ejector pin assembly 52 is connected to the second ejection driving element 51;
the part taking and labeling mechanical arm, the mold locking driving device 3, the first ejection driving part 41 and the second ejection driving part 51 are electrically connected with the controller.
The part taking and labeling mechanical arm comprises a labeling end, a part taking end and a transverse guide rail, wherein the labeling end can be close to or far away from a movable mold plate 1 of the injection molding machine along the transverse guide rail, and the part taking end can be close to or far away from a fixed mold plate 2 of the injection molding machine along the transverse guide rail. Without prejudice to understanding, the drawings of the present description do not show a specific structural view of the pick-and-place labelling robot.
The first ejection driving element 41 is further provided with a position sensor 6, the position sensor 6 is electrically connected to the controller, and the position sensor 6 is configured to detect whether the first ejector pin assembly 42 is retracted to an initial position;
when the position sensor 6 detects that the first ejector pin assembly 42 retracts to the initial position, the controller sends an ejection working instruction to the second ejection driving element 51 and sends a picking and labeling working signal to the picking and labeling mechanical arm; the second ejection driving part 51 drives the second ejector pin assembly 52 to eject the injection molding to the part taking and labeling mechanical arm according to the working instruction; and the mechanical arm for picking and labeling the injection molding piece places the label in the mold of the movable mold plate 1 according to the working signal and grabs the injection molding piece.
The initial position is the position when the first ejector pin component is not ejected out of the movable template.
Specifically, the position sensor 6 may be a proximity switch fixed to the first ejector driving member 41, and a metal rod 7 is connected to the back surface of the first ejector plate 43, and when the first ejector plate 43 is retracted to the initial position, the metal rod 7 is just sensed by the proximity switch.
The in-mold labeling injection molding system is also provided with an alarm device, and the alarm device is electrically connected with the controller; when the position sensor 6 does not detect that the first thimble assembly 42 retracts to the initial position within a set time, the controller sends an alarm working instruction to the alarm device.
The in-mold labeling injection molding system of this application embodiment utilizes first ejection mechanism to ejecting injection molding to 2 sides of fixed die plate when the die sinking through set up first ejection mechanism in 1 side of movable die plate, sets up second ejection mechanism in 2 sides of fixed die plate, utilizes second ejection mechanism to ejecting injection molding to getting on a labeling arm. And the first ejection mechanism, the second ejection mechanism and the workpiece taking and labeling mechanical arm are linked, so that the workpiece taking and labeling mechanical arm can take and label simultaneously and does not interfere with the first ejector pin assembly 42.
As shown in fig. 2, in an exemplary embodiment, the in-mold labeling in the embodiment of the present application is performed by the steps of:
step S0.2: the injection molding machine is opened, the movable mold plate 1 is driven by the mold locking driving device 3 to move away from the fixed mold plate 2, and meanwhile, a first ejector pin assembly 42 arranged on the movable mold plate 1 is driven by a first ejection driving part 41 to eject an injection molding piece onto the fixed mold plate 2;
step S1: the part taking and labeling mechanical arm extends between the fixed template 2 and the movable template 1;
step S2: detecting whether the first ejector pin assembly 42 arranged on the movable mould plate 1 is retracted to the initial position; if yes, go to step S3; if not, the controller sends an alarm working instruction;
step S3: the part taking and labeling mechanical arm places a label in a mold of the movable mold plate 1, the second ejector pin component 52 arranged on the fixed mold plate 2 is ejected out, the injection molding part is ejected out to the part taking and labeling mechanical arm, and the part taking and labeling mechanical arm grabs the injection molding part.
In actual production, due to the design problems of the product structure and the mold structure, some injection molded parts can be left in the male mold after mold opening, and some injection molded parts can be left in the female mold after mold opening. In this embodiment, the mold on the movable platen 1 side is a female mold, and the mold on the fixed platen 2 side is a male mold. To realize labeling and part taking simultaneously, the injection molding part needs to be left in the male mold after mold opening, so that the part taking and labeling mechanical arm can place the label in the female mold conveniently. Therefore, for a product which is left in the female die after the die opening, an ejector pin is needed to be added, and the ejector pin ejects the injection molding part to the male die during the die opening. In order not to affect the labeling of the mechanical arm of the subsequent picking and labeling machine, the first ejector pin assembly 42 on the female mold side must be retracted to the initial position before the picking and labeling mechanical arm performs the labeling, so that the second ejection mechanism and the picking and labeling mechanical arm of the embodiment are linked with the first ejection mechanism, and the interference between the picking and labeling mechanical arm and the first ejector pin assembly 42 is avoided.
If the position sensor 6 does not detect that the first thimble assembly 42 is retracted to the initial position within a certain time, the controller sends an alarm operation command to the alarm device. The alarm device may be a buzzer, a malfunction light, etc. The predetermined time is preset data, and is specifically adjusted according to the moving speed of the first ejection mechanism and the ejection length of the first ejector pin assembly 42.
Step S4 is further provided after step S3, and step S4 is specifically that the pick-up and attachment robot retracts, the second ejector driving unit 51 drives the second ejector pin assembly 52 to retract, the mold locking driving unit drives the movable mold plate 1 to move towards the fixed mold plate 2 until the movable mold plate 1 and the fixed mold plate 2 are attached, and the injection molding machine performs injection and repeats steps S0.2 to S3.
In order to adapt to more application scenarios, step S0.1 is further provided before step S0.2, where step S0.1 specifically includes: the controller identifies the current operating mode, and if the current operating mode is the first thimble assembly and the second thimble assembly linkage mode, the steps S0.2 to S4 are executed.
If the current working mode is the ordinary working mode, the linkage of the first ejector pin assembly 42 and the second ejector pin assembly 52 is not executed, and the ordinary working mode is suitable for in-mold labeling without or after taking a piece first and then labeling. Specifically, the injection molding machine is opened firstly, after the mold is opened in place, the part taking mechanical arm enters between the fixed mold plate 2 and the movable mold plate 1, and the first ejector pin assembly 42 pushes the injection molding part to the part taking mechanical arm.
According to the in-mold labeling method, the ejection and mold opening actions of the first ejection mechanism are performed simultaneously, the injection molding piece is ejected to the side of the fixed mold plate 2, so that the piece taking and labeling mechanical arm can label on the side of the movable mold plate 1 and take the piece on the side of the fixed mold plate 2, the actions on the two sides can be performed simultaneously, the working period of the injection molding machine is shortened, and the working efficiency is improved. Meanwhile, the first ejection mechanism on the side of the movable template 1, the second ejection mechanism on the side of the fixed template 2 and the piece taking and labeling mechanical arm are linked, so that the first ejector pin assembly 42 is returned when the piece taking and labeling mechanical arm performs labeling and piece taking actions, and the first ejector pin assembly 42 can be prevented from colliding with the piece taking and labeling mechanical arm.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.