CN-115122591-B - Hot runner assembly in injection molding machine

Abstract

The invention discloses a hot runner assembly in an injection molding machine, which comprises a support and a runner body, wherein the runner body comprises a first runner body, a second runner body, a third runner body and a fourth runner body which are sequentially connected, and a nozzle arranged on the fourth runner body, the runner body is provided with a valve needle linkage connecting rod mechanism comprising a hinge mounting seat, a linkage rod, a first cross rod, a second cross rod and a pair of first, second and third connecting rods, a reset spring is arranged between the hinge mounting seat and the second runner body, the corresponding end of the third runner body is provided with a first valve needle and a first cross rod arranging long hole, the first cross rod is arranged in the first cross rod arranging long hole in a penetrating manner and is vertically connected with the first valve needle, the fourth runner body is provided with a second cross rod arranging long hole, the second cross rod is arranged in the second cross rod arranging long hole in a penetrating manner, two ends of the second cross rod are respectively connected with the middle part of the corresponding second connecting rod, and the second cross rod is vertically connected with a second valve needle arranged in the nozzle. The hot runner assembly provided by the invention can be applied to various injection molding machines.

Inventors

• YANG JIAN
• LI GANG

Assignees

• 苏州塑之美智能装备有限公司

Dates

Publication Date

20260508

Application Date

20220624

Claims (7)

1. 1. A hot runner assembly in an injection molding machine comprises a support, a runner body and a heater arranged on the runner body, and is characterized in that the runner body comprises a first runner body penetrating through the support, a second runner body connected with the first runner body, a third runner body connected with the second runner body, a fourth runner body connected with the third runner body and a nozzle arranged on the fourth runner body, wherein the runner body is provided with a valve needle linkage connecting rod mechanism, the valve needle linkage connecting rod mechanism comprises a first pair of linkage rods which are arranged on one end of the second runner body close to the first runner body through a hinge mounting seat, a first connecting rod, a second connecting rod and a third connecting rod which are in one-to-one correspondence with the linkage rods, and a second cross rod which is movably hinged with the corresponding end of a first pair of third connecting rods, one end of the linkage rods is movably hinged with the hinge mounting seat, the other end of the linkage rods is movably hinged with the corresponding end of the first connecting rod, the other end of the first connecting rod is movably connected with the corresponding end of the first connecting rod, the other end of the first connecting rod is movably hinged with the second connecting rod, a reset nut is arranged in the second end of the second connecting rod, which is arranged in the second connecting rod is close to the second runner, a first end of the first adjusting nut is movably arranged in the second connecting rod is in the second connecting rod, a first end of the second connecting rod is close to the first adjusting nut is arranged in the first end of the second connecting rod, which is in the first adjusting nut is in close to the first connecting channel, which is in close to the first adjusting hole, and is arranged in the first adjusting nut which is in close to the first adjusting nut, the valve seat is provided with a valve plug matched with the inner hole in the annular valve needle seat, the third runner body is further provided with a first cross rod arranging long hole which is vertically communicated with the first valve needle mounting hole and penetrates through the third runner body, the first cross rod is movably arranged in the first cross rod arranging long hole in a penetrating mode, the corresponding end of the first valve needle is connected with the middle part of the first cross rod, the other end of the third runner body is provided with a central runner, a plurality of eccentric runners which are communicated with the central runners in the second runner body and the third runner body are arranged around the valve needle mounting hole in the corresponding end of the third runner body, the fourth runner body is sequentially provided with a hinged support and a second cross rod arranging long hole which transversely penetrates through the fourth runner body along the discharging direction, the second cross rod is movably arranged in the second cross rod arranging long hole in a penetrating mode, the middle part of the second connecting rod is movably hinged on the hinged support, the corresponding end of the fourth runner body is also provided with a second cross rod communicating with the second long hole, the second runner body is provided with the corresponding end of the second cross rod is provided with a plunger piston, and the plunger is arranged in the corresponding runner body and is at least connected with the second runner, and the corresponding plunger piston is arranged in the second runner body.
2. 2. The hot runner assembly of claim 1, wherein the fourth runner body has an annular flow guiding boss at an end near the perforation.
3. 3. The hot runner assembly in an injection molding machine as set forth in claim 2, wherein the side of the annular guide boss is curved.
4. 4. A hot runner assembly in an injection molding machine as claimed in claim 1, wherein a plunger tip of said second valve needle is provided with a tapered guide head.
5. 5. The hot runner assembly in an injection molding machine as set forth in claim 1, wherein said stop step is tapered.
6. 6. The hot runner assembly in an injection molding machine as set forth in claim 5, wherein a top portion of said nozzle is tapered with a taper greater than a taper of said step stop.
7. 7. A hot runner assembly in an injection molding machine as set forth in any one of claims 1 to 6 wherein said second runner body has a corresponding end inserted into said first runner body, said third runner body has a corresponding end inserted into said second runner body, said fourth runner body has a corresponding end inserted into said third runner body, and said fourth runner body has a corresponding end inserted into said nozzle.

Description

Hot runner assembly in injection molding machine Technical Field The invention relates to an injection molding machine, in particular to a hot runner assembly in the injection molding machine. Background At present, a valve control device arranged at an outlet of a hot runner assembly in an injection molding machine can be closed under the action of external force. When in actual use, the valve control device cannot sense the change of the materials in the flow channel, and the outlet of the hot runner assembly cannot be closed at the optimal time of the material change, so that the material leakage phenomenon is caused, and moreover, the material leakage is blocked at the outlet, so that the normal use of the valve control device is further influenced. Disclosure of Invention The invention aims to solve the technical problem of providing a hot runner assembly in an injection molding machine capable of closing an outlet without external force. The technical scheme includes that the hot runner assembly in the injection molding machine comprises a support, runner bodies and a heater arranged on the runner bodies, wherein the runner bodies comprise first runner bodies penetrating through the support, second runner bodies connected with the first runner bodies, third runner bodies connected with the second runner bodies, fourth runner bodies connected with the third runner bodies and injection nozzles arranged on the fourth runner bodies, the runner bodies are provided with valve needle linkage connecting rod mechanisms, the valve needle linkage connecting rod mechanisms comprise a first pair of linkage rods arranged at one end of the second runner bodies close to the first runner bodies through a hinge mounting seat, first connecting rods, second connecting rods and third connecting rods which are in one-to-one correspondence with the linkage rods, and second cross rods movably hinged with corresponding ends of a pair of third connecting rods, one ends of the linkage rods are movably hinged to the hinge mounting seat, the other ends of the linkage rods are movably hinged with corresponding ends of the first connecting rods, the other ends of the second connecting rods are movably hinged with corresponding ends of the first connecting rods, the second connecting rods are movably hinged with the second connecting rods, a reset nut is arranged at one end of the second runner, which is close to the second adjusting nut is arranged in the second runner, the other end of the second connecting rod is in the second runner is provided with the second adjusting nut, the second connecting rod is in the second adjusting nut is in the second runner, the second connecting rod is in the second adjusting nut is in the first threaded manner, the second connecting rod is in the second threaded state, and the second nut is in the second threaded state, and the second nut is in the adjusting nut is in the second threaded state, and the second nut is in the nut, the valve seat is provided with a valve plug matched with the inner hole in the annular valve needle seat, the third runner body is also provided with a first cross rod positioning long hole which is vertically communicated with the first valve needle mounting hole and penetrates through the third runner body, the first cross rod is movably arranged in the first cross rod positioning long hole in a penetrating way, the corresponding end of the first valve needle is connected with the middle part of the first cross rod, the other end of the third runner body is provided with a central runner, a plurality of eccentric runners which are communicated with the central runners in the second runner body and the third runner body are arranged around the valve needle mounting hole in the corresponding end of the third runner body, the fourth runner body is sequentially provided with a hinging support and a second cross rod positioning long hole which transversely penetrates through the fourth runner body along the discharging direction, the middle part of the second cross rod is movably hinged on the hinging support, the corresponding end of the fourth runner body is also provided with a corresponding step, the corresponding end of the fourth runner body is further provided with a second cross rod, the valve plug is communicated with the corresponding end of the second runner body in the second runner body, and the valve plug is arranged in the corresponding end of the fourth runner body, and the valve plug is communicated with the second runner body. In one preferable scheme, in the hot runner assembly in the injection molding machine, the fourth runner body is provided with an annular flow guiding boss which is gradually smaller at one end close to the perforation. In one preferable mode, in the hot runner assembly in the injection molding machine, a side surface of the annular flow guiding boss is an arc-shaped curved surface. In one preferred embodiment, in the hot runner assem