Method and device for making silicone rubber cupping appliance

A method for producing a silicone rubber cupping appliance using a device, the device comprising:

• a nozzle;
• an internal mould core;
• a separable slide comprising at least two separable slide blocks;
• and
• a blowing-demoulding unit;
• wherein a mould cavity used for moulding the silicone rubber cupping appliance is formed between the slide and the internal mould core;
• wherein one end of the nozzle is connected to a channel that transfers liquid silicone rubber material, another end of the nozzle is connected to the mould cavity;
• and
• wherein the blowing-demoulding unit is connected to the mould cavity through a blow duct opening which is set at a contact surface of the internal mould core and the mould cavity;
• the method comprising the following steps:
• 1) heating the moulding zone which is at least formed by the slide, internal mould core and the mould cavity;
• at the same time cooling the channel that the liquid silicone rubber material must pass by and/or a zone surrounding the channel;
• 2) injecting liquid silicone rubber material into the mould cavity;
• 3) stopping adding material and keeping heat preserving for a duration of time;
• and
• 4) separating the separable slide, at the same time opening the blow duct opening, and blowing the moulded silicone rubber cupping appliance in the mould cavity by the blowing-demoulding unit for demoulding;
• wherein the step 4) further comprises:
• 4.1) separating the separable slide at two sides along a direction lying vertical or approximately vertical to an axial of the mould cavity, causing an external mould surface of the silicone rubber cupping appliance in the mould cavity to be exposed in air;
• 4.2) opening the blow duct opening in the blowing-demoulding unit, causing the blow duct opening of the blowing-demoulding unit to be connected to the mould cavity;
• and
• 4.3) letting the high pressure gas enter between the internal mould surface of the mould cavity and a solidified silicone rubber cupping appliance through the blow duct opening, and blowing away the solidified silicone rubber cupping appliance from the internal mould surface;
• and
• the method further comprises:
• repeating steps 2) to 4);
• wherein the channel that transfers liquid silicone rubber material comprises a cold flowing channel adapted to be cooled by cooled water from a cooled water channel;
• the blowing-demoulding unit comprises a blow duct and a blow needle;
• the blow duct opening is at an end of the blow duct and connects to the mould cavity;
• and the blow needle is located within the blow duct and controls opening and closing of the blow duct opening;
• the blow duct comprises a conical stand hole adjacent to the blow duct opening;
• a cross-sectional diameter of the conical stand hole in proximity to the blow duct opening is less than that of the conical stand hole distal from the blow duct opening;
• wherein the blow needle comprises a rod section and a top section in proximity to the blow duct opening;
• the top section is a conical stand with a same conical angle as the conical stand hole of the blow duct;
• and the top section adapts to engage tightly with the conical stand hole of the blow duct;
• and
• wherein during demoulding the separable slide separates, the blow needle departs from the mould cavity along the blow duct, thereby causing the blow duct opening to open and allowing high pressure gas to enter the mould cavity through the blow duct.