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Injection molding method for producing plastic box having integrated inspection window, plastic box and power tool comprising such plastic box

A technology for power tools and inspection windows, which is applied in the field of power tools and can solve problems such as limiting the visibility of fuel liquid levels

Pending Publication Date: 2022-05-03
HUSQVARNA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The downside of these limitations is that lighting conditions and the posture of the hand held power tool can limit the visibility of the fuel level

Method used

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  • Injection molding method for producing plastic box having integrated inspection window, plastic box and power tool comprising such plastic box
  • Injection molding method for producing plastic box having integrated inspection window, plastic box and power tool comprising such plastic box
  • Injection molding method for producing plastic box having integrated inspection window, plastic box and power tool comprising such plastic box

Examples

Experimental program
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Embodiment Construction

[0051] figure 1 A power tool embodied as a hand-held chainsaw 10 is shown. Chainsaw 10 includes an internal combustion engine 12 configured to rotate a saw chain 14 about a guide bar 16 . The fuel tank 18 of the chainsaw 10 is configured to hold fuel to be burned in the internal combustion engine 12 (which is typically a two-stroke engine), and the chain oil tank 20 is configured to hold saw chain oil for use as the saw chain 14 travels along the guide bar 16 Lubricate the saw chain. The fuel tank 18 is integrally formed with the rear handle 22 of the chainsaw 10 and includes two opaque plastic tank halves 18 a , 18 b fused together along a joint 24 . A first of the tank halves 18a, 18b 18a is provided with a transparent fuel inspection window 26 integrally formed with this tank half 18a in a manner which will be described in more detail below. The chainsaw 10 also includes a front handle 28 and the rear handle 22 is provided with a trigger 30 for controlling the internal c...

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Abstract

A method of producing a plastic box for a power tool, comprising: providing a molded tool comprising a transparent inspection window (26); injecting liquefied plastic onto the molding tool to form a tank wall (34), the liquefied plastic engaging with the inspection window (26) at the secondary molding joint; and allowing the injected plastic to cure to form a bond with the inspection window (26) wherein the inspection window (26) comprises at least one liquefied precursor ridge (44a, 44b, 64a, 64b) extending from a surface of the inspection window (26) along a secondary molding joint wherein the liquefied plastic is injected onto the secondary molding joint to at least partially liquefy the liquefied precursor ridge (44a, 44b, 64a, 64b).

Description

technical field [0001] The present invention relates to a method of producing a plastic case for a power tool, a plastic case, and a power tool comprising such a plastic case. Background technique [0002] Modern fuel tanks for hand-held power tools are made of plastic. There are many different requirements placed on fuel tanks. For example, they need to be mechanically robust and allow easy refilling and checking of the current fuel level. Fuel tanks also need to meet various safety standards; for example, they need to be leak-proof under high pressure. The gas pressure can differ significantly between the interior of the tank and the external ambient air pressure; in some cases the difference can be as high as 30-40 kPa. [0003] Typically, the current fuel level is communicated to the operator via a transparent fuel level inspection window. For mechanical strength, the tank is usually made of glass fiber or carbon fiber reinforced plastic, while the fuel window is mad...

Claims

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Application Information

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IPC IPC(8): B29C45/16B25F5/00
CPCB29C45/1615B25F5/00B29C2045/1659B29L2031/7172B25F5/02B29C45/162B29K2995/0026
Inventor 彼得·比约克曼乔尔·阿兰德尔
Owner HUSQVARNA AB
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