Liquid adhesive dispensing system

Patent metadata

Field	Value
Publication number	US-10500604-B2
Application number	US-201815893353-A
Country	US
Kind code	B2
Filing date	Feb 9, 2018
Priority date	Feb 9, 2018
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A dispenser for dispensing a liquid onto a substrate is disclosed. The dispenser includes a dispenser module including a nozzle body having an inlet, an outlet, a chamber for receiving a liquid, and a central valve body attached to the nozzle body. The central valve body defines a piston chamber. The dispenser module also includes a valve member having a piston portion disposed within the piston chamber of the central valve body and a needle portion extending form the piston portion into the chamber of the nozzle body. The dispenser also includes a heater block for heating the nozzle body, where the heater block defines a liquid passage for transporting liquid from the liquid supply to the dispenser. A first surface of the heater block directly contacts the nozzle body, and the entirety of the central valve body is spaced from the heater block. The dispenser also includes a stroke adjustment assembly comprising an adjustment rod configured to contact the valve member and a locking collar configured to alternate between an unlocked and a locked configuration.

First claim

What is claimed is:

1. A liquid dispenser module, comprising:
a housing including an inlet, an outlet, and a chamber in communication with the inlet and the outlet for receiving a liquid;
a valve member configured to be actuated from a first position to a second position so as to jet an amount of the liquid from the chamber through the outlet, wherein the first and second positions are separated by a stroke length; and
a stroke adjustment assembly comprising:
an adjustment rod that includes external threads and is configured to contact the valve member; and
a locking collar that includes internal threads and is configured to alternate between an unlocked and a locked configuration, wherein 1) when the locking collar is expanded into the unlocked configuration, the adjustment rod is movable relative to the locking collar to adjust the stroke length, and 2) when the locking collar is compressed into the locked configuration, the internal threads of the locking collar apply a locking force to the external threads of the adjustment rod so as to prevent the adjustment rod from moving relative to the locking collar.

2. The liquid dispenser module of claim 1 , wherein each of the external threads of the adjustment rod has an upper surface and a lower surface, wherein the internal threads of the locking collar are configured to apply a force to the upper and lower surfaces of the external threads when the locking collar is in the locked configuration.

3. The liquid dispenser module of claim 1 , wherein the adjustment rod is rotatable relative to the locking collar when the locking collar is in the unlocked configuration so as to adjust the stroke length.

4. The liquid dispenser module of claim 1 , wherein the housing defines an adjustment chamber, wherein the locking collar and a portion of the adjustment rod are disposed in the adjustment chamber.

5. The liquid dispenser module of claim 4 , wherein the stroke adjustment assembly further comprises a locking screw coupled to the locking collar, wherein actuation of the locking screw alternates the locking collar between the unlocked configuration and the locked configuration.

6. The liquid dispenser module of claim 5 , wherein the locking screw extends from a threaded portion that engages the locking collar and is disposed within the adjustment chamber to a shaft portion disposed external to the adjustment chamber.

7. The liquid dispenser module of claim 4 , wherein the stroke adjustment assembly further comprises a Belleville spring disposed within the adjustment chamber for imparting a force on an upper end of the locking collar.

8. The liquid dispenser module of claim 1 , wherein an upper end of the adjustment rod includes a hex recess for receiving a hex tool, wherein the hex tool is configured to engage the hex recess to move the adjustment rod relative to the locking collar to adjust the stroke length when the locking collar is in the unlocked configuration.

9. The liquid dispenser module of claim 8 , wherein the stroke adjustment assembly further comprises a knurled rod disposed around the upper end of the adjustment rod, wherein an upper surface of the housing has a plurality of markings and the knurled rod has a visual indicator, such that a relation between the plurality of markings and the visual indicator is indicative of the stroke length.

10. The liquid dispenser module of claim 1 , wherein:
the valve member is configured to be actuated from the first position to the second position along a vertical direction; and
the locking collar defines a fixed position along the vertical direction.

11. The liquid dispensing module of claim 5 , wherein the locking screw is configured to rotate in a first rotational direction so as to compress the locking collar into the locked configuration, and rotate in a second rotational direction that is opposite the first rotational direction so as to expand the locking collar into the unlocked configuration.

Assignees

• Nordson Corp

Inventors

• Levins Matthew P
• Ganzer Charles P

Classifications

• B05C11/1034

  specially designed for conducting intermittent application of small quantities, e.g. drops, of coating material (B05C5/0225, B05C11/1026 take precedence) · CPC title

• B05C5/001 Primary

  incorporating means for heating or cooling the liquid or other fluent material (B05C11/1042 takes precedence) · CPC title

• B05C11/1042

  provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus · CPC title

• B05C5/0225

  characterised by flow controlling means, e.g. valves, located proximate the outlet (B05C5/0258, B05C5/0275 take precedence; supply valves upstream the coating head B05C11/1036) · CPC title

• F16K1/523

  for limiting the maximum flow rate, using a stop · CPC title