Rapid grinding device for plastic mold

Abstract

The utility model relates to the technical field of plastic mold polishing, in particular to a rapid plastic mold polishing device which comprises an operation table, a polishing mechanism and a limiting mechanism for limiting the polishing depth. The limiting mechanism is composed of a limiting disc, a grinding disc, a bolt and a nut. A bolt is fixedly connected to the grinding disc; and the bolt penetrates through the limiting disc and is in threaded connection with the nut. According to the rapid grinding device for the plastic mold, the limiting mechanism is arranged, when the grinding disc grinds the plastic mold to the set depth, the limiting disc can extrude a plastic grinding piece so that the grinding disc can not continue to move downwards, and meanwhile a pressure sensor sends feedback to the PLC; the PLC controls the air cylinder to move upwards; meanwhile, the 555 timer is controlled to stop timing; therefore, different polishing depths can be adjusted according to different polishing requirements, and meanwhile, a 555 timer is used for timing according to the duration of each polishing piece; and a production plan can be effectively planned.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic mold grinding, in particular to a plastic mold rapid grinding device. Background Art

[0002] The main reason why plastic molds need to be polished is to improve the appearance and quality of the product, remove burrs and surface defects, extend the service life of the mold, and meet the requirements of injection molding. Grinding can reduce the roughness of the mold surface, correct the defects and uneven parts of the mold surface, and make the plastic parts have a smoother surface and more accurate size after demolding.

[0003] Patent application number CN202123269672.7 relates to a plastic mold grinding device, including a base plate, the top of the base plate is fixedly connected to an adjusting base, the top of the base plate is fixedly connected to a lifting and adjusting mechanism, and is located on the outside of the adjusting base, so as to prevent iron filings splashing during the grinding process from injuring the staff watching nearby, and the protection is greatly improved. The mold can be displaced on the top side of the adjusting base, and the burrs on the left and right sides of the mold can be comprehensively polished. The staff does not need to manually push the mold, which greatly improves the efficiency of the mold grinding process, and effectively avoids the situation where the mold is offset due to the vibration generated by the grinding. At the same time, there is no need to support the mold with both hands during the grinding process, which further improves the safety of the grinding operation, and the installation box can be quickly assembled and replaced. At the same time, the distance between the installation boxes can be adjusted in time according to the length of the mold, further improving the scope of application of the overall grinding device.

[0004] However, this patent cannot adjust the grinding depth according to different grinding requirements; at the same time, it cannot control the grinding time well and cannot complete the effective planning of production plan.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the utility model is to provide a plastic mold rapid grinding device which can effectively solve the above technical problems.

[0007] In order to achieve the purpose of this utility model, the following technical solutions are adopted:

[0008] A plastic mold rapid grinding device, comprising: an operating table, a grinding mechanism, and a limiting mechanism for limiting the grinding depth;

[0009] The limiting mechanism is composed of a limiting plate, a grinding plate, a bolt and a nut; the grinding plate is fixedly connected with a bolt; the bolt passes through the limiting plate and is threadedly connected with the nut.

[0010] Furthermore, a scale bar is fixedly installed on one side of the bolt.

[0011] Furthermore, the grinding mechanism is composed of a motor that drives the limit plate and the grinding plate to rotate, and a cylinder that drives the motor to move up and down; the output shaft of the motor is fixedly connected to the limit plate; and the telescopic rod of the cylinder is fixedly connected to the motor.

[0012] Furthermore, a pressure sensor is provided on the limit plate; a 555 timer is provided inside the workbench, and a PLC controller for controlling the timing of the 555 timer; the pressure sensor is electrically connected to the PLC controller; and the PLC controller is electrically connected to the 555 timer.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a plastic mold rapid grinding device by setting a limit mechanism. When the grinding disc grinds the plastic mold to a set depth, the limit disc will squeeze the plastic grinding piece so that the grinding disc cannot continue to move downward, and at the same time the pressure sensor sends feedback to the PLC controller; the PLC controller controls the cylinder to move upward; at the same time, it controls the timer to stop timing; thereby, different grinding depths can be adjusted according to different grinding requirements, and at the same time the timer counts according to the duration of each grinding piece; this helps to effectively plan the production plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0015] Figure 1 This is a structural schematic diagram of a plastic mold rapid grinding device of the utility model;

[0016] Figure 2 This is a front view of a plastic mold rapid grinding device of the utility model;

[0017] Figure 3 It is a schematic diagram of the limiting mechanism in the utility model;

[0018] Figure 4 It is a cross-sectional view of the limiting mechanism in the utility model.

[0019] In the figure: 1. operating table; 2. grinding mechanism; 3. limiting mechanism; 31. limiting plate; 32. grinding plate; 33. bolt; 34. nut; 35. scale bar; 21. motor; 22. cylinder. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the utility model, rather than all embodiments.

[0021] In the description of the present utility model, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present utility model. When a mechanism is referred to as being "fixed to" another mechanism, it may be directly on the other mechanism or there may also be a centered mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a centered mechanism at the same time. When a mechanism is considered to be "set on" another mechanism, it may be directly set on the other mechanism or there may be a centered mechanism at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] like Figures 1 to 4 As shown, the utility model is a plastic mold rapid grinding device, comprising: an operating table 1, a grinding mechanism 2, and a limiting mechanism 3 for limiting the grinding depth;

[0023] The limiting mechanism 3 is composed of a limiting plate 31, a grinding plate 32, a bolt 33, and a nut 34; the grinding plate 32 is fixedly connected with a bolt 33; the bolt 33 passes through the limiting plate 31 and is threadedly connected to the nut 34. When the grinding depth needs to be adjusted through the above mechanism, the nut 34 is rotated. Since the bolt 33 passes through the limiting plate 31 and is threadedly connected to the nut 34, and since the grinding plate 32 is fixedly connected with the bolt 33, when the nut 34 is rotated, the distance of the grinding plate 32 in the limiting plate 31 can be adjusted.

[0024] It should be noted here that a scale bar 35 is fixedly installed on one side of the bolt 33. By fixing the scale bar 35 on one side of the bolt 33, it can be used as a reference for the operator to more accurately adjust the required distance.

[0025] The grinding mechanism 2 is composed of a motor 21 that drives a limit plate 31 and a grinding plate 32 to rotate, and a cylinder 22 that drives the motor 21 to move up and down; the output shaft of the motor 21 is fixedly connected to the limit plate 31; the telescopic rod of the cylinder 22 is fixedly connected to the motor 21. When the plastic parts are polished through the above mechanism, the motor 21 drives the grinding plate 32 to rotate, and the cylinder 22 drives the grinding plate 32 and the motor 21 to move up and down.

[0026] It also includes: a pressure sensor is provided on the limit plate 31; a 555 timer is provided inside the workbench, and a PLC controller that controls the timing of the 555 timer; the pressure sensor is electrically connected to the PLC controller; the PLC controller is electrically connected to the 555 timer.

[0027] When the grinding disc 32 is grinding the workpiece, the 555 timer starts timing. When the grinding depth of the grinding disc 32 exceeds the set depth of the limit plate 31, the limit plate 31 contacts the workpiece to be polished, and the pressure sensor fixedly installed on the limit plate 31 is subjected to the pressure value and sends an electrical signal to the PLC controller. After receiving the command, the PLC controller sends a control command to control the cylinder 22 to retract the telescopic rod; and controls the timer to stop timing; by recording the grinding time of multiple groups of identical plastic molds and taking the average value, the production volume of the work can be roughly calculated, which is helpful for the factory's enterprise allocation.

[0028] The pressure sensor model mentioned in this patent is: XYZ-123.

[0029] Working principle: the staff rotates the nut 34 according to the grinding depth required by the product. Since the bolt 33 passes through the limit plate 31 and is threadedly connected to the nut 34, and since the bolt 33 is fixedly connected to the grinding plate 32, when the nut 34 is rotated, the distance of the grinding plate 32 in the limit plate 31 can be adjusted; when the grinding plate 32 grinds the workpiece, the 555 timer starts timing. When the grinding depth of the grinding plate 32 exceeds the set depth of the limit plate 31, the limit plate 31 contacts the workpiece to be polished, and the pressure sensor fixedly installed on the limit plate 31 is subjected to the pressure value and sends an electrical signal to the PLC controller. After receiving the command, the PLC controller sends a control command to control the cylinder 22 to retract the telescopic rod; and controls the 555 timer to stop timing; by recording the grinding time of multiple groups of identical plastic molds and taking the average value, the production volume of the work can be roughly calculated, which is helpful for the enterprise allocation of the factory.

[0030] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0031] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A plastic mold rapid polishing device, characterized in that: include: Operating table, grinding mechanism, and limiting mechanism for limiting grinding depth; The limiting mechanism is composed of a limiting plate, a grinding plate, a bolt and a nut; the grinding plate is fixedly connected with a bolt; the bolt passes through the limiting plate and is threadedly connected with the nut.

2. A plastic mold rapid polishing device as claimed in claim 1, characterized in that: A scale bar is fixedly mounted on one side of the bolt.

3. A plastic mold rapid polishing device as claimed in claim 2, characterized in that: The grinding mechanism is composed of a motor that drives the limit plate and the grinding plate to rotate, and a cylinder that drives the motor to move up and down; the output shaft of the motor is fixedly connected to the limit plate; and the telescopic rod of the cylinder is fixedly connected to the motor.

4. A plastic mold rapid polishing device as claimed in claim 3, characterized in that: The limit plate is provided with a pressure sensor; a 555 timer is provided inside the workbench, and a PLC controller for controlling the timing of the 555 timer is provided; the pressure sensor is electrically connected to the PLC controller; and the PLC controller is electrically connected to the 555 timer.

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