JP3393664B2 - Nozzle body for cleaning workpieces such as IC molds - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle body for cleaning a work such as an IC mold used when cleaning a work such as an IC mold.

[0002]

2. Description of the Related Art Pressurized water mixed with abrasive grains is jetted to an IC mold formed by arranging IC packages with leads protruding to the outer peripheral edge side by side in a frame, and the IC mold, particularly the leads and the IC package, are continuously installed. A work cleaning device for cleaning (burring) a part has been proposed (such a cleaning method is generally called a wet blast method or a shot blast method).

By the way, various types of nozzles used in such a cleaning apparatus, that is, nozzles for injecting pressurized water mixed with abrasive grains have been proposed.

For example, there is a nozzle as disclosed in JP-A-4-82668. This nozzle is
As shown in Fig. 3, a nozzle tube having a nozzle portion 31 at the tip.
Insert the air supply pipe 33 into the main body 32 provided with 35,
With a structure in which an introduction pipe 34 for introducing pressurized water mixed with abrasive grains into the main body 32 is connected to the side portion of 32, the pressurized water mixed with abrasive grains introduced into the main body 32 from the introduction pipe 34 is supplied by air. It is accelerated by pressurized air from the tube 33 and jetted from the nozzle portion 31 of the main body 32, and the IC mold is cleaned by pressurized water mixed with the abrasive grains.

[0005]

As a result of various studies, the applicant has confirmed that this conventional example has the following drawbacks.

Introduction of air from the air supply pipe 33 and the introduction pipe
It is very difficult to maintain a good balance with the introduction of pressurized water mixed with abrasive grains from 34, and the balance is often broken, and the ejection from the nozzle part 31 often does not become a clean continuous state. That is, the injection state from the nozzle portion 31 depends on both the pressure of the air from the air supply pipe 33 and the pressure of the pressurized water introduced from the introduction pipe 34. Therefore, when the introduction pressure from the introduction pipe 34 becomes higher than the air pressure from the flow pipe 33 and the pressurized water mixed with excessive abrasive grains is introduced into the nozzle pipe 35, a so-called clogged state occurs, and the nozzle pipe 35 The injection from is intermittent. In order to prevent this intermittent injection, the pressure at the dividing portion a where the base end of the nozzle pipe 35 and the tip of the air supply pipe 33 do not exist (air pressure from the air supply pipe 33, introduction pressure from the introduction pipe 34). The amount of pressurized water mixed with abrasive grains) should be appropriately controlled so that the pressurized water mixed with abrasive grains introduced from the introduction pipe 34 to the nozzle portion 31 does not become excessive. However, it is very difficult to properly control the pressure at the dividing portion a.

The reason why it is difficult to control the pressure in the dividing portion a is that the air is jetted from the air supply pipe 33 and is jetted from the nozzle portion 31 together with the pressurized water containing the abrasive grains as it is.

The present invention is an IC which solves such drawbacks.
It is an object to provide a nozzle body for cleaning a work such as a mold.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

A nozzle body 1 attached to a cleaning device for spraying pressurized water mixed with abrasive grains onto a work such as an IC mold to clean the work, and a space 9 capable of holding the inside at a constant pressure. In the space 9 of the flow pipe 3, the main body 2 is provided, the flow pipe 3 is provided in the space 9, the nozzle part 4 is provided at the tip of the flow pipe 3, and the pressurized air supply part 5 is provided at the base end. Introducing portion 6 which is provided with a communication hole 8 at a predetermined position and introduces and draws out pressurized water of a predetermined pressure mixed with abrasive grains into space 9
And a lead-out portion 7 are provided to keep the pressure of the pressurized water mixed with the abrasive grains in the space 9 constant, and the pressurized water mixed with the abrasive grains kept at the constant pressure in the space 9 is used as the flow pipe 3 The present invention relates to a nozzle body for cleaning a work such as an IC mold, which is constructed so as to be sucked and introduced into the flow pipe 3 through the communication hole 8.

Further, in the nozzle body for cleaning a work such as an IC mold according to claim 1, a part of the pressurized water mixed with the abrasive grains introduced from the introduction part 6 is led out from the lead-out part 7 and a part thereof. It is decompressed by being sucked and introduced into the flow pipe 3 through the communication hole 8, and the depressurized water containing the abrasive grains in the space 9 is set to be kept at a constant pressure. The present invention relates to a characteristic nozzle body for cleaning a work such as an IC mold.

Further, in the nozzle body for cleaning a work such as an IC mold according to any one of claims 1 and 2, a nozzle tube 10 is attached to the tip of the main body 2 in a state of communicating with the space 9. A hollow pipe 11 is continuously connected to the base end of the nozzle pipe 10, the base end of the hollow pipe 11 is connected to the base end of the main body 2, and the base end of the main body 2 is pressurized air. The present invention relates to a nozzle body for cleaning a work such as an IC mold, which is connected to the supply unit 5 and has a communication hole 8 formed in the hollow tube 11.

[0013]

The pressurized water mixed with abrasive grains is held at a constant pressure in the space 9 of the main body 2 by the introduction section 6 and the derivation section 7.
Pressurized water of a constant pressure mixed with abrasive grains in the main body 2 is sucked and introduced into the flow pipe 3 through the communication hole 8 by the suction force of the air passing through the flow pipe 3, and thus is jetted from the nozzle portion 4. Is not intermittent.

That is, unlike the conventional example, due to the existence of the introduction part 6 and the extraction part 7, the pressurized water mixed with the abrasive grains in the space 9 held at a predetermined pressure in good balance is sucked from the communication hole 8. As such, the injections will not be intermittent.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show one embodiment of the present invention.
This will be described below.

A nozzle tube 10 (inner diameter of about 1 mm) provided with a nozzle portion 4 at its tip is attached to the tip of a main body 2 having a space 9 therein so as to communicate with the space 9, and the base of this nozzle tube 10 is attached. A middle pipe 11 (inner diameter of about 1 mm) is continuously provided at the end, and the base end of the middle pipe 11 is continuously provided at the base end of the main body 2. The base end portion of the main body 2 is connected to the pressurized air supply portion 5 via the port 12.

A communication hole 8 is bored in the middle of the middle pipe 11, and a tubular introduction portion 6 and a discharge portion 7 for introducing pressurized water mixed with abrasive grains are communicated with a predetermined location on the outer periphery of the main body 2. It is lined up.

Since this embodiment has the above-mentioned structure, pressurized water (pressure 1.0 to 2.0 kg / cm ² ) in which a proper amount of abrasive grains (diameter of about 50 μm or less) is mixed into the space 9 through the introduction portion 6. And introducing the pressurized water to the outside of the space 9 via the outlet 7. Eventually, the pressurized water is depressurized by being led out from the lead-out portion 7, and is kept at a constant pressure (0.5-1.0 kg /
It means that it is circulating while holding cm ² ). In this state, pressurized air (pressure 0.5 to 4.0) is applied from the port 12 to the middle pipe 11.
(kg / cm ² ) is introduced, the pressurized air sucks the pressurized water mixed with the abrasive grains in the space 9 through the communication hole 8, and the pressurized water is accelerated by the air in the middle pipe 11 and the nozzle pipe 10, jetted from the nozzle unit 4 to the outside. In the space 9, pressurized water mixed with abrasive grains is circulated by the introduction section 6 and the derivation section 7,
The inside of the space 9 is kept at a constant pressure (hence,
Even if the pressurized water is sucked into the middle pipe 11 via the communication hole 8, the pressure in the space 9 does not change. ).

Therefore, according to this embodiment, the following effects can be obtained.

The pressurized water mixed with abrasive grains is sucked by passing a constant pressure of air from a space 9 of a constant pressure in which the pressured water is sealed, and the separation between the nozzle pipe 35 and the air supply pipe 33 as in the conventional example is performed. Since the portion a does not exist, the state of excess abrasive grains that occurs in the case of the conventional example does not occur, and the suction pressure sucked through the communication hole 8 is maintained in a well-balanced manner, so that the sprayed abrasive grains are mixed. The pressurized water is not intermittently ejected, is smoothly and continuously ejected, and the abrasive content in the pressurized water ejected from the nozzle portion 4 is constant because the abrasive suction amount from the communication hole 8 is constant, and is uniform. It becomes possible to wash.

Therefore, the diameter of the nozzle portion 4 can be made as small as possible by appropriately adjusting the suction force to the middle pipe 11 through the communication hole 8 by adjusting the air pressure. The part can be cleaned so accurately. In order to perform accurate cleaning, it is desirable to make the diameter of the nozzle portion 4 small, but in the structure of the conventional example, the smaller the nozzle diameter, the more the intermittent injection state occurs. It was This problem will be solved according to this conventional example.

In this embodiment, as a result of experiments, even if the diameter of the nozzle portion 4 was small (about 1 mm in diameter), the injection could be continuously performed without being intermittent.

Since the passage of the pressurized air can be set longer than that of the conventional example (in the conventional example, the passage of the pressurized air is the nozzle pipe 35, and the length of the passage of the pressurized air is this nozzle). It means the length of the tube 35.)
The accelerating length of the air becomes long, so that the jetting speed from the nozzle portion 4 can be made high without increasing the air supply pressure so much, and the cleaning effect can be enhanced.

This means that the air is sufficiently expanded in the long air passage and the air rectifying function is improved. The spread of the pressurized water (spreading radially) at the time of jetting from the nozzle portion 4 (Spreading) becomes smaller accordingly, so that it becomes possible to wash the part to be washed more accurately, and the spread when jetting from the nozzle part 4 becomes smaller means that the noise generated when spreading is increased. It means that it is possible to suppress.

[0025]

As described above, the present invention provides a nozzle body for cleaning a work such as an IC mold which enables extremely effective cleaning.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of a conventional example.

FIG. 2 is an explanatory cross section of the present embodiment.

FIG. 3 is a sectional view of the present embodiment.

[Explanation of symbols]

1 nozzle body 2 body 3 distribution pipes 4 nozzle 5 Pressurized air supply unit 6 Introduction 7 Derivation part 8 communication holes 9 space 10 nozzle tube 11 hollow tube

Claims (3)

(57) [Claims] 1. A nozzle body attached to a cleaning device for spraying pressurized water containing abrasive grains onto a work such as an IC mold to clean the work, the space having a constant pressure inside. A main body is provided, a flow pipe is provided in this space, a nozzle portion is provided at the tip of the flow pipe, a pressurized air supply portion is provided at the base end, and a communication hole is provided at a predetermined position in the space of the flow pipe. An inlet and an outlet for introducing and discharging pressurized water of a predetermined pressure mixed with abrasive grains are provided in the space to keep the pressure of the pressurized water mixed with the abrasive grains constant in the space and keep it at a constant pressure in the space. A nozzle body for washing a work such as an IC mold, characterized in that the pressurized water mixed with the abrasive grains can be sucked and introduced into the flow pipe through a communication hole of the flow pipe. 2. The nozzle body for cleaning a work such as an IC mold according to claim 1, wherein the pressurized water mixed with the abrasive grains introduced from the introduction part is partially extracted from the extraction part and part is a communication hole. It is decompressed by being introduced by suction into the flow pipe through the IC pipe, and the IC mold characterized by being set so that the pressurized water mixed with the abrasive grains in the space is kept at a constant pressure by this decompression. Nozzle body for cleaning the workpiece. 3. The IC according to claim 1,
In a nozzle body for cleaning a work such as a mold, a nozzle tube is attached to a tip of a main body in a state of communicating with the space, and a hollow tube is provided in continuous communication with a base end of the nozzle tube. The base end of the main body is connected to the base end of the main body, the base end of the main body is connected to the pressurized air supply portion, and a communication hole is bored in the hollow tube. Nozzle body for cleaning works such as molds.