Insert molding method and device
AssigneeHonda Motor Co., Ltd.
InventorsMasatoshi KOBAYASHI, Shunichi Yorozuya
Life of this patent
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Abstract
An insert molding method and device that does not require secondary injection of molten resin uses a metallic mold which forms a cavity 5 between a front cavity 3 and a rear cavity 4, and is provided with a process of retaining an inserted object 2 inside the cavity 5 by a retaining pin 8, a process of flowing a molten resin inside the cavity 5, a process of detecting a positional relationship between a flow front of the molten resin and the retaining pin 8, and a process of retreating the retaining pin 8 when it is detected that the flow front is at a predetermined position. The device is provided with the front cavity 3, the rear cavity 4, the retaining pin 8, a retaining pin controlling means 10, and a flow front position detecting means 11.
Claims14
An insert molding method, comprising:
- a process of retaining, in a metallic mold which forms a cavity between a front cavity and a rear cavity, an inserted object to a predetermined position in the cavity, by advancing into the cavity a retaining pin provided so as to freely advance into and retreat from the cavity;
- a process of making a molten resin flow inside the cavity, in the state where the inserted object is retained by the retaining pin;
- a process of detecting a positional relationship between a flow front of the molten resin within the cavity and the retaining pin;
- and
- a process of retreating the retaining pin from within the cavity, when it is detected that the flow front is at the position within a predetermined range with respect to the retaining pin.
An insert molding device equipped with a metallic mold which forms a cavity between a front cavity and a rear cavity, and a retaining pin provided so as to freely advance into and retreat from the cavity for retaining an inserted object to a predetermined position of the cavity by advancing into the cavity, comprising;
- a flow front position detecting means which is provided so as to be capable of detecting a positional relationship between a flow front of a molten resin flowing inside the cavity and the retaining pin;
- and
- an advance/retreat controlling means which controls advancing and retreating of the retaining pin into and from the cavity, and which retreats the retaining pin from within the cavity, when it is detected by the flow front position detecting means that the flow front is at a position within a predetermined range with respect to the retaining pin.
Dependencies are inferred from the claim text.