Medical consumable injection mold applied to automatic injection molding equipment

Abstract

The invention relates to the technical field of injection molding, in particular to a medical consumable injection mold applied to automatic injection molding equipment, which comprises a mold body, a runner is arranged in the mold body, the opening part of the runner is connected with a switcher, the switcher is provided with a heating port and a cooling port, the heating port is used for a heating agent to flow in, and the cooling port is used for a cooling agent to flow in; the mold release device further comprises a controller which is used for controlling the switcher to communicate with the heating opening and the flow channel after the mold release agent is sprayed and controlling the heating agent to flow into the flow channel from the heating opening. A preheating temperature is preset in the controller, and the controller is further used for controlling the heating agent to heat the mold body according to the preheating temperature. By adopting the scheme, the removal efficiency of redundant release agent and residual moisture in the injection mold can be improved, and the production efficiency of the injection mold is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to an injection mold for medical consumables used in automated injection molding equipment. Background Art

[0002] Injection molds are usually composed of two major parts, a movable mold and a fixed mold, depending on the structural design of the injection molded product. When the fixed mold and the movable mold are closed, a closed cavity is formed, and the cavity is the shape of the injection molded product. The movable mold and the fixed mold include multiple components such as the core, cavity plate, gate sleeve, guide pin, guide sleeve, and ejection mechanism. The multiple components are used to realize the closing, injection, and opening of the fixed mold and the movable mold. Taking the production of plastic products as an example, when using it, the molten plastic is injected into the mold cavity through the nozzle of the injection molding machine, and maintained at a certain pressure and temperature for a period of time so that the plastic fully fills the cavity and cools and solidifies. When the plastic product is cooled to a sufficient hardness, the mold is opened, and the ejection mechanism ejects the plastic product from the mold, completing an injection molding cycle.

[0003] During the injection molding process, in order to ensure that the plastic product can be smoothly ejected from the mold, it is usually necessary to spray a release agent in the mold cavity. However, spraying will produce excess release agent, and the release agent contains water. If the release agent is not cleaned in time before mold closing, the excess release agent and water will remain in the mold cavity, causing adverse effects on subsequent injection molding, resulting in defects on the surface of the plastic product, and even affecting the dimensional accuracy and structural integrity of the plastic product.

[0004] In order to solve the above problems, the prior art uses high-pressure gas to air-dry the mold. Although it can remove excess release agent and part of the moisture to a certain extent, the mold drying time is relatively long. In addition, for molds with complex cavity structures, it is difficult for high-pressure gas to completely blow out the residual moisture in the corners of the mold cavity. Summary of the invention

[0005] The present invention aims to provide an injection mold for medical consumables used in automated injection molding equipment, which can improve the removal efficiency of excess release agent and residual moisture in the injection mold and improve the production efficiency of the injection mold.

[0006] The present invention provides the following basic scheme: An injection mold for medical consumables used in automated injection molding equipment comprises a mold body, a flow channel is arranged in the mold body, a switch is connected to the flow channel mouth, a heating port and a cooling port are arranged on the switch, a heating agent flows into the heating port, and a coolant flows into the cooling port; The utility model also includes a controller, which is used for controlling the switch to connect the heating port and the flow channel after the release agent is sprayed, and controlling the heating agent to flow from the heating port into the flow channel.

[0007] Furthermore, the controller is preset with a preheating temperature, and the controller is also used to control the heating agent to heat the mold body according to the preheating temperature.

[0008] Furthermore, the flow channel includes a spiral pipe, a cavity is provided in the mold body, and the distance from the axis of the spiral pipe to the surface of the cavity is the same.

[0009] Furthermore, the controller is also used to control the switch to connect the cooling port and the flow channel after injection molding, and to control the coolant to flow from the cooling port into the flow channel.

[0010] Furthermore, the controller is also used to control the opening of the mold body and obtain a workpiece video of the mold body injection-molded workpiece after the mold opening; and is also used to perform image analysis based on the workpiece video to determine whether there are abnormal burrs on the injection-molded workpiece.

[0011] Furthermore, the controller is also used to collect infrared detection video of the injection molding process of the mold body after determining that an injection-molded workpiece has abnormal burrs; it is also used to analyze heat changes based on the infrared detection video and call a preset control strategy for the injection molding process of the mold body to determine whether the heat changes comply with the control strategy.

[0012] Furthermore, the controller is also used to generate a temporary control signal after determining that the heat change does not comply with the control strategy, and optimize the control strategy according to the heat change to generate a temporary control strategy, and control the injection process of the injection mold according to the temporary control strategy.

[0013] Furthermore, the controller is also used to call the workpiece video after determining that the heat change meets the control strategy, optimize the control strategy according to the workpiece video, and control the injection process of the injection mold according to the optimized control strategy.

[0014] Furthermore, the controller is also used to delete the temporary control strategy after obtaining the recovery signal uploaded by the staff, and call the preset control strategy to control the injection process of the injection mold.

[0015] Beneficial effects of the basic program: 1. In this solution, the switch is provided to switch the inlet connected to the flow channel, so as to introduce different substances into the flow channel to achieve different purposes. When a heating agent is introduced into the flow channel, the mold body is heated by the heating agent, so as to preheat the mold body before the molten plastic enters the cavity of the mold body. The flow rate of excess release agent is accelerated by preheating, and the residual moisture in the mold body is evaporated by preheating. When applied to mold bodies with complex structures, compared with air drying, heating evaporation can effectively remove residual moisture in every corner of the structure. Compared with the prior art method of using high-pressure gas for air drying, this solution effectively improves the removal efficiency of excess release agent and residual moisture in the injection mold, thereby improving the production efficiency of the injection mold.

[0016] 2. In this solution, the workpiece video is used to perform real-time image detection and analysis of the workpiece during the injection molding process, and abnormal burrs on the injection-molded workpiece are discovered in a timely manner, so as to solve the problems in the injection molding process in a timely manner. When abnormal burrs are discovered, the infrared detection video is triggered for thermal analysis. By matching the heat distribution changes in the injection mold during the injection molding process with the heat changes that should occur in the control strategy, it is determined whether there is an abnormality in the equipment execution, thereby assisting the staff in abnormal analysis and improving the production efficiency of the injection molding process.

[0017] 3. In this solution, when the heat change does not match the control strategy, a temporary control signal is generated to remind the staff that there is an abnormality in injection molding and to make timely improvements. At the same time, the control strategy is optimized based on the heat change to generate a temporary control strategy. During the period of abnormal injection molding, the injection molding process of the injection mold is controlled by the temporary control strategy to ensure the qualified production of the injection molded workpiece, thereby ensuring production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a mold body of an embodiment of a medical consumables injection mold applied to automated injection molding equipment according to the present invention; Figure 2 The present invention is a logic block diagram of a controller for an injection mold for medical consumables applied to automated injection molding equipment. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods: The reference numerals in the drawings of the specification include: a mold body 1 , an injection groove 2 , a spiral pipe 3 , a transverse pipe 4 , and a mouth 5 .

[0020] Example The medical consumables injection mold used in automated injection molding equipment comprises a mold body 1, as shown in the attached Figure 1 As shown, a flow channel is provided in the mold body 1. Specifically: the mold body 1 includes a movable mold and a fixed mold, and an injection groove 2 matching the injection molding workpiece is opened on the opposite side of the movable mold and the fixed mold. After the movable mold and the fixed mold are molded together, the injection groove 2 forms a cavity (that is, a cavity is provided in the mold body 1), and the cavity is the position of the injection molding workpiece after injection molding. Flow channels are opened on both the movable mold and the fixed mold, and the flow channels include a spiral pipe 3. The distance from the axis of the spiral pipe 3 to the surface of the cavity is the same, that is, the distance from the axis of the spiral pipe 3 to the bottom of the injection groove 2 is the same.

[0021] There are two spiral pipes 3 on both the movable mold and the fixed mold. The two spiral pipes 3 are arranged in parallel. One end of the two spiral pipes 3 is connected through a transverse pipe 4 , and the other end is connected through another transverse pipe 4 .

[0022] The flow channel mouth 5 is connected to a switch, and a heating port and a cooling port are provided on the switch. The heating port is for the heating agent to flow in, and the cooling port is for the coolant to flow in. Specifically: the flow channel mouth 5 is connected to a switch, and the switch is divided into an inlet switch and an outlet switch. The inlet switch has two inlets and one outlet. The two inlets of the inlet switch are the heating port and the cooling port respectively. The outlet of the inlet switch is connected to the flow channel, that is, connected to a horizontal pipe 4. The outlet switch has one inlet and two outlets. The inlet of the outlet switch is connected to the flow channel, that is, connected to another horizontal pipe 4. The two outlets of the outlet switch are for the heating agent and the coolant to flow out respectively.

[0023] The heating agent is hot water or steam, and the coolant is cold water. The heating agent and the coolant can be recycled, so switches are provided at both mouths 5 of the flow channel to ensure the flow separation of the heating agent and the coolant.

[0024] The injection mold includes an injection molding machine and a mold body 1 installed on the injection molding machine, and also includes a controller, which is loaded on the injection molding machine. Figure 2 As shown, the controller includes a storage module, a mold opening and closing control module, a preheating module, an injection molding module, a cooling module, an image analysis module, a heat detection module, a control module and an intelligent optimization module. The controller is preset with a preheating temperature, that is, the storage module stores the preheating temperature and the control strategy. The preheating temperature is calculated based on the temperature required for preheating the mold body 1 and the temperature simulation of the heat loss. The control strategy is a strategy for controlling the injection molding process of the mold body 1, including the injection pressure and the injection molding time corresponding to the injection pressure.

[0025] The controller is used to control the switcher to connect the heating port and the runner after spraying the release agent, and control the heating agent to flow from the heating port into the runner. The controller is also used to control the heating agent to heat the mold body 1 according to the preheating temperature. Specifically: the mold opening and closing control module controls the mold body 1 to open after injection molding. After the mold body 1 is opened, the mold body 1 is sprayed with a release agent, that is, the injection grooves 2 of the fixed mold and the movable mold are sprayed with a release agent. The preheating module is used to control the inlet switcher to connect the heating port and the runner after spraying the release agent, and control the outlet of the switcher to connect the runner and the outlet of the heating agent; it is also used to control the heating agent to flow from the heating port into the runner. The mold opening and closing control module is also used to control the mold body 1 to close after the heating agent flows into the runner for a specified time. The specified time is the length of time it takes for the mold body 1 to be preheated to the required temperature, which is calculated through simulation.

[0026] During the preheating process, the temperature of the mold body 1 rises, and the flow rate of the excess release agent is accelerated by preheating, and the residual moisture in the mold body 1 is evaporated by preheating. When applied to a mold body 1 with a complex structure, compared with air drying, the temperature-raising evaporation can effectively remove the residual moisture in every corner of the structure.

[0027] The controller is also used to control the switch to connect the cooling port and the flow channel after injection molding, and to control the coolant to flow from the cooling port into the flow channel. Specifically: the injection molding module is used to call the control strategy after the mold body 1 is closed, and the mold body 1 is injected according to the control strategy. The cooling module is used to control the inlet switch to connect the cooling port and the flow channel after injection molding, and to control the outlet switch to connect the flow channel and the outlet where the coolant flows out; it is also used to control the coolant to flow from the cooling port into the flow channel.

[0028] After injection molding, that is, after the molten plastic completely fills the cavity, the heating agent is stopped and switched to the coolant through the switch. At this time, the mold body 1 is cooled to achieve injection molding of the workpiece. In the early stage of injection molding, the mold body 1 reaches a certain temperature, and the temperature difference between the mold body 1 and the molten plastic is reduced, so as to avoid the expansion or contraction of the molten plastic caused by sudden temperature changes, generate ripples, and affect the surface quality of the injection molded workpiece. Compared with the prior art, the yield rate of the injection molded workpiece is improved.

[0029] The controller is also used to control the mold body 1 to open the mold, and obtain the workpiece video of the mold body 1 injection-molded workpiece after the mold is opened; it is also used to perform image analysis based on the workpiece video to determine whether there are abnormal burrs in the injection-molded workpiece. Specifically: the storage module is also used to store the workpiece video, and the workpiece video is collected by a camera set in the injection molding machine. The workpiece video is a workpiece video of the injection-molded workpiece collected after the mold body 1 is opened, and the workpiece video contains the injection-molded workpiece. Burrs are some parts of the workpiece that do not meet the design requirements, such as edges, flash, sharp corners, and splashes, which appear on the workpiece after injection molding.

[0030] The image analysis module is used to split the workpiece video to obtain continuous video frames, extract frames at intervals, perform image recognition on the extracted video frames, mark the workpiece in the video frame, and mark the edge of the workpiece when marking; it is also used to perform image analysis based on the workpiece mark, and identify whether there are abnormal burrs on the injection molded workpiece based on the marked edge. In this solution, the workpiece video is used to perform real-time image detection and analysis of the workpiece during the injection molding process, so as to promptly detect abnormal burrs on the injection molded workpiece, thereby promptly solving problems in the injection molding process.

[0031] The controller is also used to collect infrared detection video of the injection molding process of the mold body 1 after determining that there are abnormal burrs on the injection molding workpiece; it is also used to analyze the heat change according to the infrared detection video, and call the preset control strategy of the injection molding process of the mold body 1 to determine whether the heat change complies with the control strategy. Specifically: the heat detection module is used to generate an infrared detection signal and collect infrared detection video of the injection molding process of the mold body 1 after determining that there are abnormal burrs on the injection molding workpiece. The infrared detection video is collected by an infrared thermal imager set in the injection molding machine. The infrared thermal imager is started when the heat detection module generates an infrared detection signal to collect the infrared detection video.

[0032] The heat detection module is also used to analyze heat changes based on the infrared detection video. The heat changes include injection heat and the heat duration corresponding to the injection heat. A heat change trend graph is generated based on the injection heat and the corresponding heat duration. The heat detection module is also used to call the control strategy in the storage module and generate an injection change trend graph based on the injection pressure and the corresponding injection duration. The heat detection module is also used to match the heat change trend graph with the injection change trend graph. When the change trends of the two are consistent, it is determined that the heat change complies with the control strategy; otherwise, it is determined that the heat change does not comply with the control strategy.

[0033] In this solution, when an abnormal burr is found, the infrared detection video is triggered for thermal analysis. First, the triggering time of infrared detection is set to effectively utilize the processing resources of the controller and reduce production costs. Second, by matching the heat distribution changes in the injection mold during the injection molding process with the heat changes that should occur in the control strategy, it is possible to determine whether there is an abnormality in the equipment execution.

[0034] The controller is also used to generate a temporary control signal after determining that the heat change does not conform to the control strategy, and optimize the control strategy according to the heat change to generate a temporary control strategy, and control the injection process of the injection mold according to the temporary control strategy. Specifically: The temporary control module is used to generate a temporary control signal after determining that the heat change does not conform to the control strategy, and send the temporary control signal to the client of the staff. In this way, the staff is reminded that there is an abnormality in the execution of the equipment, thereby assisting the staff in abnormal analysis and improving the production efficiency of the injection molding process.

[0035] The temporary control module is also used to call the control strategy when generating the temporary control signal, optimize the control strategy according to the heat change, and generate the temporary control strategy. Specifically, the temporary control module is also used to determine the injection control hysteresis when the change trend of the heat change trend graph is later than the change trend of the injection change trend graph, and calculate the hysteresis duration according to the change trends of the heat change trend graph and the injection change trend graph; it is also used to call the control strategy, adjust the injection duration according to the hysteresis duration, optimize the control strategy according to the adjusted injection duration, and generate the temporary control strategy. The temporary control module is also used to determine the injection control advance when the change trend of the heat change trend graph is earlier than the change trend of the injection change trend graph, and calculate the advance duration according to the change trends of the heat change trend graph and the injection change trend graph; it is also used to call the control strategy, adjust the injection duration according to the advance duration, optimize the control strategy according to the adjusted injection duration, and generate the temporary control strategy. The storage module is also used to store the temporary control strategy after generating it. The injection molding module is also used to control the injection molding process of the injection mold according to the temporary control strategy after generating the temporary control signal.

[0036] The controller is also used to delete the temporary control strategy after obtaining the recovery signal uploaded by the staff, and call the preset control strategy to control the injection process of the injection mold. Specifically: the recovery signal is the signal uploaded by the staff through the client after the injection mold and the injection molding machine are inspected and repaired. The storage module is also used to delete the temporary control strategy after obtaining the recovery signal. The injection molding module is also used to control the injection process of the injection mold according to the preset control strategy after obtaining the recovery signal.

[0037] In this solution, when the heat change does not match the control strategy, a temporary control signal is generated to remind the staff that there is an abnormality in injection molding and make timely improvements. At the same time, the control strategy is optimized based on the heat change to generate a temporary control strategy. During the period of injection abnormality, the injection process of the injection mold is controlled by the temporary control strategy to ensure the qualified production of the injection molded workpiece, thereby ensuring production efficiency.

[0038] The controller is also used to determine that the heat change meets the control strategy, call the workpiece video, optimize the control strategy according to the workpiece video, and control the injection molding process of the injection mold according to the optimized control strategy. Specifically: the intelligent optimization module is preset with a neural network model, the input of the neural network model is a workpiece video with burrs, and the input of the neural network model is the strategy parameter. The intelligent optimization module is used to determine that the heat change meets the control strategy, call the workpiece video, and obtain the strategy parameters output by the neural network module according to the workpiece video; it is also used to call the control strategy and adjust the control strategy according to the strategy parameters, that is, to optimize the control strategy. The storage module is used to update according to the optimized control strategy, that is, to replace the original control strategy in the storage module. The injection molding module is also used to control the injection molding process of the injection mold according to the optimized control strategy.

[0039] In this solution, when the heat change is consistent with the control strategy, it means that there is no problem in the execution of the injection molding control. At this time, the control strategy for controlling the injection molding process is optimized to improve the accuracy of the injection molding control, thereby reducing or even removing the burr phenomenon of the injection molded workpiece.

[0040] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Medical consumables injection mold used in automated injection molding equipment, characterized by: The mold body comprises a flow channel, a switch is connected to the flow channel mouth, a heating port and a cooling port are provided on the switch, the heating port is for a heating agent to flow in, and the cooling port is for a coolant to flow in; The utility model also includes a controller, which is used for controlling the switch to connect the heating port and the flow channel after the release agent is sprayed, and controlling the heating agent to flow from the heating port into the flow channel.

2. The medical consumables injection mold for automated injection molding equipment according to claim 1, characterized in that: The controller is preset with a preheating temperature, and the controller is also used to control the heating agent to heat the mold body according to the preheating temperature.

3. The medical consumables injection mold for automated injection molding equipment according to claim 2, characterized in that: The flow channel comprises a spiral pipe, a cavity is arranged in the mold body, and the distances from the axis of the spiral pipe to the surface of the cavity are the same.

4. The medical consumables injection mold for automated injection molding equipment according to claim 3, characterized in that: The controller is also used to control the switch to connect the cooling port and the flow channel after injection molding, and to control the coolant to flow from the cooling port into the flow channel.

5. The medical consumables injection mold for automated injection molding equipment according to claim 4, characterized in that: The controller is also used to control the opening of the mold body and obtain a workpiece video of the mold body injection-molded workpiece after the mold opening; and is also used to perform image analysis based on the workpiece video to determine whether there are abnormal burrs in the injection-molded workpiece.

6. The medical consumables injection mold for automated injection molding equipment according to claim 5, characterized in that: The controller is also used to collect infrared detection video of the injection molding process of the mold body when it is determined that an injection molded workpiece has abnormal burrs; it is also used to analyze heat changes based on the infrared detection video and call the preset control strategy of the mold body injection molding process to determine whether the heat changes comply with the control strategy.

7. The medical consumables injection mold for automated injection molding equipment according to claim 6, characterized in that: The controller is also used to generate a temporary control signal after determining that the heat change does not conform to the control strategy, optimize the control strategy according to the heat change, generate a temporary control strategy, and control the injection process of the injection mold according to the temporary control strategy.

8. The medical consumables injection mold for automated injection molding equipment according to claim 7, characterized in that: The controller is also used to determine that the heat change meets the control strategy, call the workpiece video, optimize the control strategy according to the workpiece video, and control the injection process of the injection mold according to the optimized control strategy.

9. The medical consumables injection mold for automated injection molding equipment according to claim 8, characterized in that: The controller is also used to obtain the recovery signal uploaded by the staff, delete the temporary control strategy, and call the preset control strategy to control the injection process of the injection mold.

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