CN204546852U - A kind of injection mold clamping magnetic suction disc - Google Patents

Abstract

The utility model relates to the technical field of injection molding, in particular to a magnetic sucker clamped by an injection mold, which is provided with a disc body, and a plurality of magnetic poles, high coercive force magnetic strips, excitation coil components, low coercive force The magnetic force unit composed of magnetic blocks is characterized in that the magnetic poles are set in the disk body and connected with the disk body through bolts. The magnetic poles are separated by high-coercivity magnetic strips. The upper end of the high-coercivity magnetic strips is equipped with Hall sensors. The sensor is connected to the MCU through wires, and the MCU is connected to the alarm and the liquid crystal display through the output circuit respectively. There is a low coercivity magnetic block under the magnetic pole, and an excitation coil assembly is set around the low coercive force magnetic block. The magnetic pole, high coercive force magnetic block A sealant layer is filled between the force magnetic strip, the low coercive force magnetic block, the excitation coil assembly and the sucker. The utility model has the advantages of convenient operation, reliable operation, and detection of the effective area of the magnetic force.

Description

An injection mold clamping magnetic sucker

technical field

The utility model relates to the technical field of injection molding, in particular to an injection mold clamping magnetic sucker which is convenient to operate, reliable in operation and capable of detecting the effective area of magnetic force.

Background technique

As we all know, when using mechanical or hydraulic traditional fixtures to clamp injection molds, it is necessary to carry out processes such as centering, alignment and fastening, which have the disadvantages of complicated operations, long loading and unloading time, and low work efficiency; in addition, due to mechanical or hydraulic fixtures The hydraulic clamps are all "point" clamping. The contact area between the injection mold and the clamp is small, and there is no clamp holding point at the central stress area (center point) of the injection mold. Therefore, during injection molding production, due to frequent Compression and pulling operations can easily cause mold deformation and damage, and often require maintenance or even replacement of the mold, which affects normal production.

In recent years, people have invented electro-permanent magnetic suction cups to position and connect injection molds. The conversion of the polarity of the magnetic pole of the low-coercivity magnetic material and the superposition and cancellation of the magnetic field of the high-coercivity magnetic material realize quick clamping or quick disassembly of the injection mold. Its structure is to install electro-permanent magnetic suction cups on the fixed wallboard and movable wallboard of the injection molding machine respectively, and realize quick clamping, loosening and disassembly of the injection mold through magnetization and demagnetization. In addition, this mechanism makes the injection molding machine There is no traditional loading and unloading fixture for the back plate, which expands the application range of the mold and the applicability of the injection molding machine, and improves the use ability of the injection molding machine to a certain extent. It can realize the installation of molds of various sizes on one injection molding machine, especially It is suitable for multi-variety and small-batch production, and solves the heavy manpower operation of clamping and unloading during injection molding production, greatly reducing the loading and unloading time, and is easy to operate. The working state of the electro-permanent magnetic chuck in the magnetic chuck clamped by the injection mold needs to be controlled by an electric control system. The existing electro-permanent magnetic chuck electric control system does not have a corresponding chuck magnetic detection device and a sucker mold position detection device. After the electronic control system is magnetized, it cannot detect whether the magnetic force of the magnetic chuck meets the requirements and whether the mold slips during the production process. If the magnetic force of the electro-permanent magnetic chuck is insufficient, the mold may fall off, equipment damage or even casualties may occur. , if the electro-permanent magnetic chuck is displaced, the mold may be damaged during the mold clamping process.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a magnetic suction cup for clamping an injection mold with the function of detecting the mold size, reliable operation and convenient operation.

In order to achieve the above object, the utility model can be achieved through the following measures:

A magnetic suction cup clamped by an injection mold is provided with a disc body, and a plurality of magnetic units composed of magnetic poles, high coercive force magnetic strips, excitation coil components, and low coercive force magnetic blocks are arranged in the disc body, and is characterized in that the magnetic poles are set The magnetic poles are separated by high-coercivity magnetic strips. Hall sensors are installed on the top of the high-coercivity magnetic strips. The Hall sensors are connected to the MCU through wires, and the MCUs output The circuit is connected with the alarm and the liquid crystal display, so that the data can be displayed on the liquid crystal display synchronously, which is convenient for observation; the adsorption size displayed by clamping the magnetic suction cup through the injection mold is compared with the actual size of the mold back plate. If the error is large, the MCU will also It can send a signal to the alarm through the output circuit to make the alarm alarm. There is a low coercivity magnetic block under the magnetic pole, and an excitation coil assembly is arranged around the low coercive force magnetic block. The magnetic pole, high coercive force magnetic strip, and low coercive force magnetic strip A sealant layer is filled between the force magnetic block, the excitation coil assembly and the sucker.

The magnetic pole described in the utility model is provided with a low-coercive force magnetic block whose peripheral size is smaller than the magnetic pole, and an excitation coil assembly is provided around the low-coercive force magnetic block, the magnetic pole and the high-coercive force magnetic strip to make full use of the magnetic chuck The inner space increases the magnetic force of the magnetic sucker per unit area.

The utility model is designed according to the principle that the air reluctance is much greater than the reluctance of the mold. When working, the magnetic force line starts from the N magnetic pole, passes through the air circulation to the S magnetic pole in the area not covered by the mold back plate, and the magnetic force line passes through the Huo pole. Hall sensor, the Hall sensor sends a signal to the MCU through the output circuit; in the area covered by the mold back plate, the magnetic force line starts from the N magnetic pole, passes through the mold back plate and circulates to the S magnetic pole to form a loop, and the magnetic force line does not pass through the Hall sensor , the Hall sensor has no signal output. When installing the injection mold or if the mold clamping is not firm or the mold slides and shifts during the production process of the installed mold, the signal status of each Hall sensor can be collected through the MCU. , the size of the mold backplane can be calculated, and then compared with the actual size of the mold backplane for comparison and analysis. The comparison data will be displayed on the LCD through the output circuit. If the error is large, the MCU will send a signal to the alarm through the output circuit. The alarm has the advantages of convenient operation, reliable operation, and detection of the effective area of the magnetic force.

Description of drawings

Fig. 1 is a schematic diagram of the adsorption end face of the present invention.

FIG. 2 is a sectional view of FIG. 1 .

Fig. 3 is a schematic view of the internal structure of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

A magnetic suction cup clamped by an injection mold, which is provided with a disk body 1. The shape of the suction cup can be set according to processing requirements, and can be square, circular, or irregular. The upper end of the disk body can be provided with a positioning installation hole to facilitate the positioning of the mold. The disk body 1 is provided with a plurality of magnetic units composed of magnetic poles 2, high coercive force magnetic strips 3, excitation coil assemblies 5, and low coercive force magnetic blocks 4. It is characterized in that the magnetic poles 2 are arranged in the disk body 1 and passed through The bolts are connected with the disk body 1, and the magnetic pole 2 is preferably set in the central area of the disk body 1, and the magnetic pole 2 can also be arranged in other positions according to the needs. The upper end of the force magnetic strip 3 is provided with a Hall sensor 6, and the Hall sensor 6 is connected to the MCU through a wire, and the MCU is respectively connected to the alarm and the liquid crystal display through an output circuit, so that the data can be synchronously displayed on the liquid crystal display for easy observation; Compare the adsorption size displayed by the injection mold clamping magnetic chuck with the actual size of the mold back plate. If the error is large, the MCU can also send a signal to the alarm through the output circuit to make the alarm alarm. There is a low coercive force magnet under the pole 2. block 4, an excitation coil assembly 5 is arranged around the low coercivity magnetic block 4, and a sealant layer is filled between the magnetic pole 2, the high coercivity magnetic strip 3, the low coercivity magnetic block 4, the excitation coil assembly 5 and the sucker, To fill the gap between the magnetic pole 2, the high coercive force magnetic strip 3, the low coercive force magnetic block 4, the exciting coil assembly 5 and the sucker 1.

The magnetic pole described in the utility model is provided with a low-coercive force magnetic block whose peripheral size is smaller than the magnetic pole, and an excitation coil assembly is provided around the low-coercive force magnetic block, the magnetic pole and the high-coercive force magnetic strip to make full use of the magnetic chuck The inner space increases the magnetic force of the magnetic sucker per unit area.

The utility model is designed according to the principle that the magnetic resistance of the air is much greater than that of the ferromagnetic material. The mold of the injection molding machine is usually made of ferromagnetic material. When working, the magnetic force line starts from the N magnetic pole and passes through the air circulation in the area not covered by the mold back plate. A loop is formed to the S magnetic pole, the magnetic force line passes through the Hall sensor, and the Hall sensor sends a signal to the MCU through the output circuit; in the area covered by the mold back plate, the magnetic force line starts from the N magnetic pole and circulates through the mold back plate to the S magnetic pole to form circuit, the magnetic line of force does not pass through the Hall sensor, and the Hall sensor has no signal output. When the injection mold is installed or the installed mold is in the production process, if the mold clamping is not firm, the mold slides and shifts, etc., it can be passed. The MCU collects the signal status of each Hall sensor to calculate the size of the mold backplane, and then compares and analyzes it with the actual size of the mold backplane. The comparison data is displayed on the LCD through the output line. If the error is large, the MCU passes The output circuit sends a signal to the alarm. The alarm sends out an alarm, which has the advantages of convenient operation, reliable work, and detection of the effective area of the magnetic force.

Claims (2)

1. an injection mold clamping magnetic suction disc, be provided with disk body, be provided with multiple by magnetic pole in disk body, high-coercive force magnetic stripe, field coil assembly, the magnetic force unit of low-coercivity magnetic patch composition, it is characterized in that magnetic pole to be located in disk body and to be connected with disk body through bolt, isolated by high-coercive force magnetic stripe between magnetic pole, high-coercive force magnetic stripe upper end is provided with Hall element, Hall element is connected with MCU through wire, MCU is connected with alarm or liquid crystal display by output circuit, low-coercivity magnetic patch is provided with below magnetic pole, low-coercivity magnetic patch periphery is provided with field coil assembly, magnetic pole, high-coercive force magnetic stripe, low-coercivity magnetic patch, field coil assembly and interambulacrum are filled with sealant layer.

2. a kind of injection mold clamping magnetic suction disc according to claim 1, it is characterized in that being provided with below magnetic pole the low-coercivity magnetic patch that peripheral size is less than magnetic pole, low-coercivity magnetic patch periphery, magnetic pole and high-coercive force magnetic stripe have field coil assembly.