At present, the holding brake mechanism of two plate injection molding machine is mostly open and close type holding brake mechanism. The so-called opening and closing type holding brake mechanism includes holding brake cylinder and holding brake nut. The holding brake cylinder provides power for the holding brake nut to hold the pull rod. The holding nut is divided into holding nut and fixed nut along the axial direction. The lock nut is connected to the piston rod of the holding brake cylinder, which can be far away from or locked by the power of the holding brake cylinder Pull rod, a complete injection molding machine includes four holding brake oil cylinders and four holding brake nuts, each holding brake cylinder corresponds to a holding brake nut. In the long-term use of this structure, the holding brake mechanism has the following disadvantages: the four holding brake mechanisms can not hold the brake synchronously and accurately, or even deform due to poor coordination, which seriously affects the reliability of the holding brake mechanism.
Contents of utility model
The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art, and to provide a new type of two plate injection molding machine holding brake mechanism with simple structure and accurate and consistent action.
Compared with the prior art, the utility model has the following beneficial effects: the overall structure is simple and compact, the cost is low, the operation is easy, the holding brake is accurate, the action is fast and consistent, the repeated positioning accuracy is high, the utility model is safe and reliable, and the adverse effects caused by the inconsistent holding brake are effectively eliminated.
In order to understand the utility model more clearly, the specific implementation mode of the utility model will be described in combination with the attached drawings.
Description of drawings
Fig. 1 is a structural diagram of the utility model.
Specific implementation mode
As shown in Fig. 1, the holding brake mechanism of the new-type two plate injection molding machine comprises a pull rod 1 and a piston 2, a travel switch 3 and a straight line Displacement sensor 4. The screw thread section 11 of the pull rod 1 is correspondingly provided with a holding brake nut 5, and the travel switch 3 is close to the holding brake nut 5 and corresponds to the screw thread section 11 of the pull rod 1, which is in a straight line Displacement sensor 4 is located on the other side of the pull rod relative to the travel switch 3 and against the piston 2.
The working principle of the utility model is as follows: the travel switch senses the position point signal of the screw tooth section of the pull rod, and then feeds the signal back to the control system. According to the signal, the control system drives the piston and the pull rod to move synchronously through the hydraulic system, and the linear displacement sensor feeds back the position size to ensure that the actual movement positions of the four pull rods and the piston are consistent, which is finally realized Synchronous precise brake.