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1. (WO2018022192) ENSEMBLE BUSE D'ENTRÉE LATÉRALE AVEC UNE RONDELLE FAITE D'UN ALLIAGE À MÉMOIRE DE FORME
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A side gate nozzle assembly for a hot runner apparatus, the side gate nozzle

assembly positioned between a cavity member of a mold plate, and a nozzle body of a manifold, the side gate nozzle assembly comprising:

a generally disc shaped base body;

a probe member extending forward from the base body, wherein the probe comprises a probe channel along the length of the probe to allow passage of a molten molding material, wherein the molten molding material is received through a melt channel of the nozzle body, and allowed to pass through the probe channel to transfer the molten molding material to a cavity of the cavity member;

a sealing insulator positioned proximal to the distal end of the probe member; and

a shape memory alloy washer inserted along the probe member, and positioned between the base body and the sealing insulator, wherein the shape memory alloy washer distorts linearly to push the sealing insulator and the probe member apart as a response to the rise in temperature due to the transfer of the molten molding material from the melt channel to the cavity of the cavity member via the probe channel, thereby preventing leakage of the molten molding material from the melt channel, and the probe channel.

2. The side gate nozzle assembly of claim 1 , wherein the shape memory alloy

washer further allows sliding engagement between the nozzle body and the cavity member by expanding linearly to generate a linear motion as response to the rise in temperature due to the transfer of the molten molding material from the melt channel to the cavity of the cavity member via the probe channel.

3. The side gate nozzle assembly of claim 2, wherein the shape memory alloy washer is made from a mixture of nickel and titanium, thereby causing a phase change between an martensite phase and an austenite phase of crystal structure causing a deformation of the shape memory alloy washer, which generates the linear motion to allow sliding engagement between the nozzle body and the cavity member.

4. The side gate nozzle assembly of claim 1 , wherein the shape memory alloy

washer is fastened in a gap between a manifold plate and a backing plate of the hot runner apparatus via a fastener, wherein the shape memory alloy washer deforms due to the heating up of the hot runner apparatus, thereby providing movement and force to seal the manifold against the nozzle body.

5. The side gate nozzle assembly of claim 1, wherein the side gate nozzle assembly is inserted between the cavity member and the nozzle body in one or more configurations, wherein each configuration comprises the insertion of the side gate nozzle assembly from one of a single side, opposing sides, and from four sides of the cavity member.

6. The side gate nozzle assembly of claim 5, wherein the shape memory alloy

washer of the side gate nozzle assembly in each configuration, expand and close the gap between the cavity member and the nozzle body to allow the flow of the molten molding material through the melt channel and the probe channel.

7. The side gate nozzle assembly of claim 5, wherein the shape memory alloy

washer of variable thickness is selected for different pressure requirements and pressure differences across different applications of the hot runner apparatus.

8. The side gate nozzle assembly of claim 1, wherein when the molten molding material is allowed to flow into the cavity of the cavity member, the side gate nozzle assembly expands to create a preloaded seal between the cavity member and the nozzle body.

9. The side gate nozzle assembly of claim 1, wherein more than one shape memory alloy washer is stacked over each other, wherein an amount of warping of each shape memory alloy washer is multiplied by the total number of shape memory alloy washers.

10. The side gate nozzle assembly of claim 1, wherein the shape memory alloy

washer is configured to deflect within a predefined distance at a predefined phase change temperature.