The utility model relates to the field of mold injection nozzles, in particular to a injection nozzle mechanism to prevent the backflow of materials, including a injection nozzle arranged on the mold, a injection gun connected with the injection nozzle, and a steel ball. The injection nozzle is provided with a injection channel arranged through the injection nozzle, and the injection nozzle is provided with a feed inlet connected with the injection channel. The injection channel includes a main material channel and a side material channel, and the side material channel is arranged on one side of the main material channel, And the side material channel is connected with the main material channel, and the diameter of the main material channel is larger than the diameter of the feed inlet; The inner wall of the main material channel is provided with a limit boss, the steel ball is arranged in the main material channel, and the steel ball can move up and down is arranged between the feed port and the limit boss. In the injection state, the raw material passes through the feed port through the gun and pushes the steel ball to move down, and the raw material flows out of the side material channel to the mold; When the shooting gun is left, the steel ball moves upward under the action of high pressure in the mold to block the feeding port. Move up to block the feeding port. Move up to block the feeding port< br/>
【技术实现步骤摘要】
一种防止物料倒流的射料咀机构
[0001]本技术涉及模具射料咀领域,特别涉及一种防止物料倒流的射料咀机构。
技术介绍
[0002]在注塑成型工艺中,现有往模具注塑工作中,往往会采用射料咀来与射枪进行连接,让材料通过射料咀进入模具内,避免了由于材料的流量或行进速度的变化而导致出料量不均匀,而现有射料咀的结构较为简单,在射枪完成射料动作后退出射料咀时材料会往外返流导致模具内的材料溢出,导致模具内的出料量不足或不均匀。
技术实现思路
[0003]为克服现有技术中的不足,本技术提供一种利用模具内产生的高压来防止物料倒流的射料咀机构。
[0004]为实现上述目的,本技术采用的技术方案如下:一种防止物料倒流的射料咀机构,包括设于模具上的射料咀、与射料咀连接的射枪,还包括钢球,所述射料咀内设有贯穿射料咀设置的射料通道,所述射料咀上设有与射料通道连接的进料口,所述射料通道包括主料道、侧料道,所述侧料道设于主料道一侧,且侧料道与主料道相通,所述主料道直径大于进料口直径;所述主料道内壁设有限位凸块,所述钢球设于主料道内,且钢球可上下移动的设于进料口与限位凸块之间,注射状态下原材料通过所述射枪经过进料口并推动钢球向下移动,且原材料从侧料道流出至模具;所述射枪离开状态下所述钢球受模具内高压作用下向上移动至堵住进料口。
[0005]进一步的,所述主料道孔径大于侧料道孔径,且侧料道部分重叠设置与主料道一侧,使主料道与侧料道相通。
[0006]进一步的,还包括压盖,所述射料咀顶部设有向下凹陷形成的凹槽,所述压盖
【技术保护点】
【技术特征摘要】
1.一种防止物料倒流的射料咀机构,包括设于模具上的射料咀、与射料咀连接的射枪,其特征在于:还包括钢球,所述射料咀内设有贯穿射料咀设置的射料通道,所述射料咀上设有与射料通道连接的进料口,所述射料通道包括主料道、侧料道,所述侧料道设于主料道一侧,且侧料道与主料道相通,所述主料道直径大于进料口直径;所述主料道内壁设有限位凸块,所述钢球设于主料道内,且钢球可上下移动的设于进料口与限位凸块之间,注射状态下原材料通过所述射枪经过进料口并推动钢球向下移动,且原材料从侧料道流出至模具;所述射枪离开状态下所述钢球受模具内高压作用下向上移动至堵住进料口。2.根据权利要求1所述一种防止物料倒流的射料咀机构,其特征在于:所述主料道孔径大于侧料道孔径,且侧料道部分重叠设置与主料道一侧,使主料道与侧料道相通。3.根据权利要求1所述一种防止物料倒流的射料咀机构,其特征在于:还包括压盖,所述射料咀顶部设有向下凹陷形成的凹槽,所述压盖嵌设于凹槽内。4.根据权利要求3所述一种防止物料倒流的射料咀机构,其特征在于:...
【专利技术属性】
技术研发人员:苏义阳,潘文祥,郑长春,许文添,张国升,
申请(专利权)人:晋江市凯嘉机器制造有限公司,
类型:新型
国别省市:
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