Oil cylinder piston structure for hot runner system
A technology of hot runners and oil cylinders, applied in the direction of pistons, cylindrical pistons, plungers, etc., can solve the problems of increased hydraulic oil viscosity, affecting the performance of the hot runner system, and small space between the upper and lower cavity, and achieve the effect of reducing the viscosity
Inactive Publication Date: 2015-05-20
YUDO SUZHOU HOT RUNNER SYST
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Problems solved by technology
[0003] In the hot runner system, the upper and lower cavity spaces of the cylinder connected with the Teflon tube are small. When the Teflon tube connected to the cylinder block is long, only the hydraulic pressure in the Teflon tube is used when the hydraulic oil enters and exits. The oil participates in the whole action, and the hydraulic oil in the entire oil circuit does not participate in the circulation. In this case, the viscosity of this part of the hydraulic oil will increase under the condition of high temperature and long-term movement of the piston, which will affect the piston pressure of the oil cylinder, and then affect the entire hydraulic pressure. Performance of hot runner system
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[0014] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0015] see figure 1 , 2 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time,...
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The invention provides an oil cylinder piston structure for a hot runner system. The oil cylinder piston structure for the hot runner system comprises an oil cylinder body, wherein a big piston is arranged inside the oil cylinder body and provided with a step through hole; the step through hole is divided into a first chamber and a second chamber; the first chamber is close to a lower cavity, and the second chamber is close to an upper cavity; the step through hole is internally provided with a small piston; the small piston is in seal fit with the first chamber; and a gap is reserved between the small piston and the second chamber. When oil flows into the lower cavity of the cylinder body, the small piston enters into the second chamber of the step through hole, hydraulic oil in the lower cavity enters into the upper cavity of the oil cylinder body due to the gap between the small piston and the second chamber and then original hydraulic oil in the upper cavity and the oil entered from the lower cavity enter into a hydraulic station together via a teflon tube so that hydraulic oil of a whole loop is recycled to ensure that the hydraulic oil in the oil cylinder is diluted and viscosity is reduced.
Description
technical field [0001] The invention relates to a hot runner system, in particular to an oil cylinder piston structure for the hot runner system. Background technique [0002] A hot runner is a collection of heating components used in injection molds to inject molten plastic into the cavity of the mold. The hot runner system generally consists of several parts such as hot nozzles, manifolds, temperature control boxes and accessories. The form of the hot nozzle directly determines the selection of the hot runner system and the manufacture of the mold, so the hot runner system is often divided into an open hot runner system and a needle valve hot runner system. Needle valve runner system is divided into pneumatic drive needle valve hot runner system and hydraulic drive needle valve hot runner system. [0003] In the hot runner system, the upper and lower cavity spaces of the cylinder connected with the Teflon tube are small. When the Teflon tube connected to the cylinder blo...
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Patent Timeline
Login to View More IPC IPC(8): B29C45/27F16J1/00F15B15/14
CPCB29C45/281B29C45/27F15B15/1447F15B15/1452
Inventor 李象烈
Owner YUDO SUZHOU HOT RUNNER SYST