A belt clamping action detection device

Abstract

A belt-locking mold action detection device, characterized by comprising a long, straight plate horizontally mounted on a frame along the direction of movement of a crosshead. The straight plate divides the distance between the maximum and minimum positions of the crosshead into several equal segments. The crosshead is provided with a sensor that generates an inductive pulse for each segment. The sensor output signal is connected to a processor for counting and comparison. Thus, when the mold is opening and closing, the sensor determines whether there is a deviation between the mold opening and closing position displayed by the system and the actual mold opening and closing position by generating inductive pulses for each segment of the crosshead. The present invention has a simple structure, convenient and accurate detection, effectively improves the accuracy of the mold opening and closing action, reduces position errors, protects auxiliary equipment, and has strong practical performance.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding machine production and relates to a belt mold locking action detection device of an injection molding machine. Background Art

[0002] With the development of industrial technology, the application fields of plastic products are becoming wider and wider, and the injection precision of plastic products by injection molding machines is also getting higher and higher. In order to ensure the precision of injection, it is very important to detect the belt clamping action of the injection molding machine. The clamping components of the injection molding machine are composed of pulleys, screws, nuts, vises, etc. When the mold opening and closing actions are performed without a belt clamping action detection device, once a situation such as belt derailment occurs, the mold opening and closing positions displayed by the system deviate from the actual positions reached. At this time, the system self-tests that the mold has been opened to the maximum, and the auxiliary machine robot will perform the next action at this time. This may cause direct interference between the robot and the template, resulting in damage to the auxiliary machine; if the belt derailment occurs during the mold closing action, and the system fails to detect the problem, it may cause the movable template position to lose control and damage the mold.

[0003] Upon investigation, the existing Chinese patent number 201810593378.5, "A Clamping Force Monitoring System for Injection Molding Machines Based on Wireless Transmission Technology," features multiple wireless clamping force sensors, a monitoring device, and a wireless router. The wireless clamping force sensors are equipped with a WiFi communication module, a central processing unit, an analog input module, and a strain detection circuit. This monitoring device detects real-time deformation data using wireless clamping force sensors to monitor clamping force, but does not monitor the clamping action of the belt, making it unable to promptly detect pulley debonding or other conditions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a belt clamping action detection device with simple structure, convenient and accurate detection.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a belt clamping action detection device, characterized in that: it includes a long straight plate, the straight plate is horizontally arranged on the frame along the moving direction of the crosshead, and the distance between the maximum position and the minimum position of the crosshead is evenly divided into several sections on the straight plate. A sensor is provided on the crosshead to generate an induction pulse for each section, and the output signal of the sensor is connected to the processor for counting and comparison. In this way, when the mold opening and closing action is performed, the sensor judges whether there is a deviation between the mold opening and closing position displayed by the system and the actual mold opening and closing position through the induction pulse generated by the crosshead passing through each position.

[0006] As an improvement, the evenly divided into several sections means that U-shaped grooves are evenly spaced on one side of the straight plate to form a serrated concave-convex structure on one side of the straight plate, and the width of the U-shaped grooves is consistent with the width of the convex portion.

[0007] Furthermore, mounting holes are respectively provided at both ends of the straight plate, and the two ends of the straight plate are fixed to the rear template by screws.

[0008] Furthermore, the crosshead is mounted on the switch mold cylinder through a mounting bracket, the position of the straight plate is close to the crosshead, and the position of the U-shaped groove on the straight plate is consistent with the height of the crosshead.

[0009] Preferably, the straight plate is parallel to the guide rod of the crosshead. The sensor is a proximity switch.

[0010] Finally, the processor is connected to an alarm system to prompt an alarm and avoid direct interference between the robot and the template.

[0011] Compared with existing technologies, the present invention has the following advantages: a straight plate is installed between the maximum and minimum positions of the crosshead. The straight plate is evenly divided into several sections, generating an equal number of induction pulses. A pulse is generated for each section of distance the crosshead passes, thereby detecting whether there is a deviation between the mold opening and closing positions and the actual mold opening and closing positions, thereby determining whether there is a mold locking fault. The present invention has a simple structure, convenient and accurate detection, effectively improves the accuracy of mold opening and closing operations, reduces position errors, protects auxiliary equipment, and has strong practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a straight plate structure according to an embodiment of the present invention;

[0013] Figure 2 Schematic diagram of the structure of a detection device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0014] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0015] like Figures 1-2 As shown, a belt clamping action detection device includes a long straight plate 1, which is horizontally arranged on the frame along the moving direction of the crosshead, generally fixed on the rear template 5, and usually parallel to the guide rod 4 of the crosshead 2. The straight plate 1 divides the distance between the maximum position and the minimum position of the crosshead 2 into several sections evenly and equally, and a sensor 3 is provided on the crosshead 2 to generate an induction pulse for each section. The sensor 3 can preferably adopt a proximity switch, and the output signal of the sensor 3 is connected to the processor for counting and comparison. In this way, when the mold opening and closing action is performed, the sensor 3 determines whether there is a deviation between the mold opening and closing position displayed by the system and the actual mold opening and closing position by generating an induction pulse when the crosshead 2 passes through each position.

[0016] The term "uniformly divided into several sections" refers to the following: U-shaped grooves 11 are evenly spaced along one side of the straight plate 1, forming a jagged, concave-convex structure. The width of the U-shaped grooves 11 matches the width of the protrusions 12. Mounting holes 13 are provided at each end of the straight plate 1, which is secured to the rear mold plate 5 with screws. The crosshead 2 is mounted on the mold opening and closing cylinder via a mounting bracket. The straight plate 1 is positioned close to the crosshead, and the U-shaped grooves 11 on the straight plate 1 are aligned with the height of the crosshead 2.

[0017] The working principle is as follows: during mold opening and closing, crosshead 2 moves, causing sensor 3 to generate an induction pulse each time crosshead 2 passes a certain distance across straight plate 1. This ensures that each change in the mold opening and closing position displayed on the system panel matches the actual mold opening and closing action. If the belt is not dislodged, the actual mold opening and closing position of the crosshead detected by the straight plate and sensor should be consistent with the original mold opening and closing position displayed by the system. However, if the belt is dislodged, the actual mold opening and closing position of the crosshead detected by the straight plate and sensor will be inconsistent with the original mold opening and closing position displayed by the system. This deviation can trigger an alarm through the alarm system to avoid direct interference between the robot and the template, which may cause damage to the auxiliary equipment.

[0018] The belt mold locking action detection device of this embodiment effectively improves the accuracy of mold opening and closing actions, reduces position errors, and protects auxiliary machines.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A belt clamping action detection device, characterized in that: The system includes a long straight plate, which is horizontally arranged on the frame along the moving direction of the crosshead. The straight plate divides the distance between the maximum and minimum positions of the crosshead into several equal sections. The crosshead is provided with a sensor that generates an induction pulse for each section. The sensor output signal is connected to the processor for counting and comparison. In this way, when the mold is opened and closed, the sensor determines whether there is a deviation between the mold opening and closing position displayed by the system and the actual mold opening and closing position by generating an induction pulse when the crosshead passes through each section. The term "evenly divided into several sections" means that U-shaped grooves are evenly spaced on one side of the straight plate, forming a sawtooth-like concave-convex structure on one side of the straight plate, and the width of the U-shaped grooves is consistent with the width of the convex portion; The position of the U-shaped groove on the straight plate is consistent with the height of the crosshead, and the straight plate is parallel to the guide rod of the crosshead; The sensor adopts a proximity switch.

2. The belt clamping action detection device according to claim 1, characterized in that: Mounting holes are respectively provided at both ends of the straight plate, and the two ends of the straight plate are fixed to the rear template by screws.

3. The belt clamping action detection device according to claim 1, characterized in that: The cross head is mounted on the switch mold oil cylinder through a mounting bracket, and the straight plate is located close to the cross head.

4. The belt clamping action detection device according to claim 1, characterized in that: The processor is connected to an alarm system to prompt an alarm and avoid direct interference between the manipulator and the template.

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