Search

CN-224210425-U - Pull rod combination used on injection molding machine

CN224210425UCN 224210425 UCN224210425 UCN 224210425UCN-224210425-U

Abstract

The utility model discloses a pull rod combination used on an injection molding machine, which has the technical scheme that the pull rod combination comprises a rod body with external threads at two ends, nuts are connected at two ends of the rod body, one end of the rod body is provided with a positioning shoulder protruding outwards, the side surface of the other end of the rod body is provided with a sliding hole, a positioning block is slid in the sliding hole, an elastic piece for ejecting the positioning block is arranged in the sliding hole, the end of the other end of the rod body is provided with a connecting hole communicated with the sliding hole, the connecting hole is in threaded connection with a blocking rod, a pull rope is arranged between the blocking rod and the positioning block, when the blocking rod is screwed into the connecting hole, the positioning block protrudes out of the side surface of the rod body, and the positioning shoulder is matched with the movable positioning block, so that a template and the pull rod can be rapidly positioned and installed.

Inventors

  • DONG FUKANG
  • LIU WENLIANG
  • Ge Yifu
  • Chai Xueyang
  • DING GUOFU
  • LI XUEWEI
  • DONG BO
  • ZHANG HAICHUN

Assignees

  • 宁波市北仑永帝机械制造有限公司

Dates

Publication Date
20260508
Application Date
20250609

Claims (8)

  1. 1. A pull rod combination used on an injection molding machine comprises a rod body (1) with external threads (11) at two ends, nuts (12) are connected to two ends of the rod body (1), and the pull rod combination is characterized in that one end of the rod body (1) is provided with a positioning shoulder (2) protruding outwards, the side face of the other end of the rod body (1) is provided with a sliding hole (5), a positioning block (3) slides in the sliding hole (5), the sliding hole (5) is provided with an elastic piece (4) for ejecting the positioning block (3), the end of the other end of the rod body (1) is provided with a connecting hole (6) communicated with the sliding hole (5), the connecting hole (6) is connected with a blocking rod (7) in a threaded mode, a pull rope (8) is arranged between the blocking rod (7) and the positioning block (3), and when the blocking rod (7) is screwed into the bottom of the connecting hole (6), the positioning block (3) protrudes out of the side face of the rod body (1).
  2. 2. The pull rod assembly used on the injection molding machine according to claim 1 is characterized in that threads matched with nuts (12) are arranged on the upper surface of the positioning block (3), and when the surface of the positioning block (3) and the surface of the rod body (1) are located on the same arc surface, the threads of the positioning block (3) are connected with external threads (11) on the surface of the rod body (1).
  3. 3. A pull rod assembly for use in an injection molding machine according to claim 1, wherein the elastic member (4) is a spring, and the pull rope (8) is fixed to the positioning block (3) through the spring.
  4. 4. A tie rod assembly for use in an injection molding machine according to claim 1, wherein a gap is provided between the blocking rod (7) and the connecting hole (6).
  5. 5. A tie rod assembly for use in an injection molding machine according to claim 4, wherein the gap between the plug rod (7) and the connecting hole (6) is provided with an oil layer (9).
  6. 6. A tie rod assembly for use in an injection molding machine according to claim 1, wherein the connecting hole (6) is provided at the center of the rod body (1).
  7. 7. A pull rod assembly for use in an injection molding machine according to claim 6, wherein the end face of the knob of the closure rod (7) is provided with a screwing groove (71).
  8. 8. A pull rod assembly for use in an injection molding machine as claimed in claim 1, wherein the rod body (1) is 645 high quality alloy steel rod.

Description

Pull rod combination used on injection molding machine Technical Field The present utility model relates to a component of an injection molding machine, and more particularly, to a tie rod assembly for use on an injection molding machine. Background The tie bars are main components of a horizontal injection molding machine, such as a Chinese patent document with the publication number of CN207224524U in the prior art, the patent name of the tie bars is a horizontal injection molding machine, referring to fig. 1 of the drawings, four tie bars 24 are fixed with a rear template 21 and a front template 23, and a movable template 22 slides on the tie bars 24; in the existing injection molding machine, when a pull rod is installed, a rear template and a front template are usually arranged in a threaded manner at two ends of the pull rod, one template is clamped by two nuts for installation, then the installation is defective, and after the nuts are screwed into a pull rod shore and the positions of the nuts on the pull rod are measured each time the pull rod is installed, the templates are installed. The pull rod is assembled in a hoisting mode due to the fact that the size is large in the installation process, the pull rod collides with the templates in the hoisting process to enable the nuts to move, the positioning positions of the nuts need to be adjusted continuously in the actual installation process, and the positioning installation of the templates at the two ends and the pull rod is quite inconvenient. Disclosure of utility model The utility model aims to provide a pull rod combination used on an injection molding machine, which adopts the cooperation of a positioning shoulder and a movable positioning block, so that a template and the pull rod can be rapidly positioned and installed. The technical aim of the utility model is realized by the following technical scheme: A pull rod assembly used on an injection molding machine comprises a rod body with external threads at two ends, nuts are connected to two ends of the rod body, one end of the rod body is provided with a positioning shoulder protruding outwards, the other end of the rod body is provided with a sliding hole on the side face of the rod body, a positioning block slides in the sliding hole, an elastic piece for ejecting the positioning block is arranged in the sliding hole, a connecting hole communicated with the sliding hole is formed in the end of the other end of the rod body, a blocking rod is connected to the connecting hole in a threaded mode, a pull rope is arranged between the blocking rod and the positioning block, and when the blocking rod is screwed into the bottom of the connecting hole, the positioning block protrudes out of the side face of the rod body. Preferably, the upper surface of the positioning block is provided with screw threads matched with nuts, and when the surface of the positioning block and the surface of the rod body are positioned on the same arc surface, the screw threads of the positioning block are connected with the external screw threads of the surface of the rod body. Preferably, the elastic piece is a spring, and the pull rope passes through the spring and is fixed on the positioning block. Preferably, a gap is formed between the blocking rod and the connecting hole. Preferably, the gap between the blocking rod and the connecting hole is provided with an oil layer. Preferably, the connecting hole is formed at the center of the rod body. Preferably, the knob end face of the blocking rod is provided with a screwing groove. Preferably, the rod body is 645 high-quality alloy steel rod. In summary, the utility model has at least one of the following advantages: (1) The shaft shoulder is formed by cutting a small shaft body at the position of the pull rod instead of the shaft shoulder which is protruded from the pull rod, so that the purpose is to ensure that the rod diameter of the pull rod is not reduced, and the structural strength of the pull rod is ensured. (2) The shaft shoulder and the telescopic positioning block are fixed because the protruding positions of the positioning block and the shaft shoulder are kept fixed, and the rapid, convenient and accurate installation of the templates at the two ends on the pull rod can be met. (3) The blocking rod can control the pull rope so as to facilitate retraction of the positioning block, which is convenient for removing the blocking function of the positioning block when the nut on the other side is screwed, and the blocking function of the positioning block also needs to be removed when the middle sliding template is installed on the pull rod. (4) After the nut is installed, the top function of the positioning block has a certain locking performance on the nut, and the stability of the nut installation is improved. (5) The connecting hole is filled with oil and the blocking rod, so that the inside of the pull rod is filled, and when the pull rod is subjected