A precision injection nozzle
A kind of injection and precision technology, applied in the field of precision injection molding of products, can solve the problems of inability to adjust, not suitable for precision injection molding, and the change of rubber volume affects the precision of injection control, and achieves the effect of ensuring precision and reducing errors.
Active Publication Date: 2019-10-11
GUANGZHOU TIANYUAN SILICONE MACHINE TECH
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Problems solved by technology
[0002] In the prior art, the nozzle hole of the injection nozzle is mostly sealed by a valve needle in the injection gap, that is, the nozzle hole is opened when the valve needle is pulled out from the nozzle hole, and the nozzle hole is closed after the valve needle is inserted into the nozzle hole. During the opening and closing process of the above-mentioned valve needle, due to the increase or decrease of the steps due to the entry and exit of the valve needle, the volume of the rubber material will change and affect the injection control accuracy. Moreover, the opening distance of the valve needle in the prior art It is fixed and cannot be adjusted, not suitable for precision injection molding
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[0018] refer to Figure 1 to Figure 3 , which shows the specific structure of the preferred embodiment of the present invention. The structural features of each element of the present invention will be described in detail below, and if there is a description of the direction (up, down, left, right, front and back), it is based on figure 1 The shown structure is a reference description, but the actual use direction of the present invention is not limited thereto.
[0019] The invention provides a precision injection nozzle, see figure 1 , including nozzle 1, injection mechanism connection block 2, valve needle 3 and valve needle driving mechanism, nozzle 1 is located at the front end, and injection mechanism connection block 2 is located at the rear end, which are used to connect nozzle 1 and the injection mechanism, The glue injection mechanism includes a barrel and the like. The nozzle 1 is provided with a nozzle inner chamber 11, the front end of the nozzle 1 is provided ...
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The invention discloses a precise glue-injecting nozzle, belonging to the technical field of precise injection molding of products. The precise glue-injecting nozzle comprises a nozzle, a glue-injecting mechanism connecting block, a valve needle and a valve needle driving mechanism, wherein an inner nozzle cavity is arranged in the nozzle; a nozzle hole is formed in the front end of the nozzle; the glue-injecting mechanism connecting block is provided with a raw material inlet; a channel allowing the inner nozzle cavity to be communicated with the raw material inlet is arranged in the valve needle; the front end of the valve needle is provided with a tip; and the valve needle driving mechanism can drive the valve needle to carry out reciprocating motion and to open or close the nozzle hole via the tip. Since the precise glue-injecting nozzle employs the valve needle with a hollow structure, a raw material can enter the inner nozzle cavity through the channel in the valve needle, and the raw material in the inner nozzle cavity is always communicated with the raw material in the raw material inlet, so the raw material in the inner nozzle cavity is always in a full state and is not changed in volume in a closing mode; thus, the precision of a glue injection amount is guaranteed, errors in output glue amounts are reduced, and the purpose of ultra-precise injection is achieved.
Description
technical field [0001] The invention is used in the technical field of product precision injection molding, and in particular relates to a precision injection nozzle. Background technique [0002] In the prior art, the nozzle hole of the injection nozzle is mostly sealed by a valve needle in the injection gap, that is, the nozzle hole is opened when the valve needle is pulled out from the nozzle hole, and the nozzle hole is closed after the valve needle is inserted into the nozzle hole. During the opening and closing process of the above-mentioned valve needle, due to the increase or decrease of the steps due to the entry and exit of the valve needle, the volume of the rubber material will change and affect the injection control accuracy. Moreover, the opening distance of the valve needle in the prior art It is fixed, cannot be adjusted, and is not suitable for precision injection molding. Contents of the invention [0003] In order to solve the above problems, the presen...
Claims
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IPC IPC(8): B29C45/23B29C45/74
Inventor 林叶承林焕东黄武雄
Owner GUANGZHOU TIANYUAN SILICONE MACHINE TECH