JP2015085279A - Foreign matter removal apparatus and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foreign matter removal apparatus that can greatly reduce the fraction defective of products molded in a die.SOLUTION: A foreign matter removal apparatus 10 includes: a surrounding part 11 that is installed on a die surface 63 of a die 60 so as to surround a product molding part provided in the die surface 63 of the die 60; an air injection pipe 13 where an air injection port 19 facing the inside of the surrounding part 11 is oriented so that air injected from the air injection port 19 forms a circulation flow along a peripheral wall 15 of the surrounding part 11; and an air suction pipe 12 for sucking air inside the surrounding part 11 through an air suction port 18 opening in the peripheral wall 15 of the surrounding part 11.

Description

  The present invention relates to a foreign matter removing apparatus and a foreign matter removing method for removing foreign matter attached to a product forming portion provided on a mold surface of a mold.

  Patent Document 1 includes a suction nozzle and an air supply pipe communicating with the suction nozzle from the outside, and compressed air supplied through the air supply pipe is jetted toward the bottom of the processing hole of the workpiece, A cutting waste removing device is disclosed that makes it possible to remove the remaining cutting waste. The air supply pipe communicates with the injection nozzle, and the nozzle center extension line of the injection nozzle is positioned in a region with a radius of 30% centered on the radial center of the processing hole. Compressed air is injected.

JP 2006-224245 A

  Incidentally, for example, as shown in FIG. 6, when manufacturing the connector 70 in which the terminal fitting 90 is inserted into the housing 80, the process of setting the terminal fitting 90 in the mold 60 is a reference in FIG. 5. As shown, the terminal fitting 90 is inserted and held in the holding hole 62 provided in the bottom surface of the cavity 61 of the mold 60. When the terminal fitting 90 is inserted into the holding hole 62, the shavings 50 made of metal foreign matter may adhere to the inner surface of the cavity 61 due to sliding contact between the terminal fitting 90 and the mold 60. If the molten resin is injected into the cavity 61 with the shavings 50 left untreated and then the connector 70 as a product is taken out, the shavings 50 remain in the housing 80 and must be discarded as a defective product. There is a problem of not becoming.

  In view of this, even if an attempt is made to remove the shavings 50 from the cavity 61 of the mold 60 using an apparatus according to the conventional cutting waste removing apparatus, as shown in Comparative Example 5 in Table 1 of the embodiment described later, There is a situation in which the generation of defective products in which the shavings 50 remain in the housing 80 cannot be sufficiently suppressed.

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a foreign matter removing apparatus and a foreign matter removing method capable of greatly reducing the defect rate of a product molded with a mold. And

The present invention is a foreign matter removing device for removing foreign matter attached to a product molding portion provided on a mold surface of a mold, and is installed on the mold surface of the mold so as to surround the product molding portion. An air jet pipe formed by orienting the air jet port so that air ejected from the air jet port facing the enclosure portion flows along the peripheral wall of the enclosure portion, and And an air suction pipe for sucking the air in the enclosure through an air suction port opened in the peripheral wall.
The present invention is also a foreign matter removing method for removing foreign matter attached to a product molding portion provided on a mold surface of the mold, wherein the product molding portion is enclosed on the mold surface so as to surround the product molding portion. After the setting step of installing the portion and the setting step, air is supplied into the air jet pipe facing the inside of the enclosure, and the air flows from the air jet along the peripheral wall of the enclosure An air jetting step for jetting so as to be a circulatory flow, and an air suction step for sucking the air in the enclosure part through an air suction port opening in a peripheral wall of the enclosure part simultaneously with the air ejection process It has the characteristics.

  When an enclosure is installed on the mold surface of the mold, and air is ejected from the air outlet in the enclosure, air flows along the peripheral wall of the enclosure, and air is simultaneously ejected at the same time. Since the air in the enclosure can be sucked in through the air suction port that opens to the outside, the foreign matter attached to the product molding portion is effectively removed through the air suction port. As a result, the defect rate of a product molded with a mold can be greatly reduced, and the defect rate can be substantially reduced to zero under optimum conditions.

In the present invention, air is not sprayed in a straight line with the aim at the center of the product molding part, but it does not prohibit the air itself from being sprayed onto the product molding part.
In the present invention, the air circulation includes not only the case where the air flows on the same plane but also a spiral swirling flow such as an updraft.
In the present invention, the product molding portion refers to a portion of the mold surface of the mold where the product is molded, for example, a cavity or core of the mold. Furthermore, the case where an insert member such as a terminal fitting is assembled in the cavity as the product molding portion is included.

  In the present invention, the foreign matter means a fixed object remaining in the product to such an extent that the molded product is processed as a defective product. For this reason, the foreign matter includes dust and the like floating in the work place. However, if the foreign matter is a metallic foreign matter that is generated when the terminal fitting is set in the mold, the electrical reliability is impaired by leaving the metallic foreign matter in the connector housing as a product. The merit of realizing the removal of the metal foreign object by applying the invention is great.

In the foreign material removal apparatus of an Example, it is a perspective view which shows the state by which the enclosure part was spaced apart and arrange | positioned above the metal mold | die. It is a fracture | rupture side view which shows the structure in the enclosure part installed on the type | mold surface of a metal mold | die. It is a fracture | rupture side view which shows the structure in the enclosure part installed on the type | mold surface of a metal mold | die from the angle different from FIG. It is a fracture | rupture top view which shows the structure in the enclosure part installed on the type | mold surface of a metal mold | die. It is sectional drawing of the metal mold | die with which the terminal metal fitting was set. It is sectional drawing of the housing in which the terminal metal fitting was inserted.

Hereinafter, preferred embodiments of the present invention will be shown.
A cross section of the peripheral wall of the enclosure along the direction of air circulation is circular. Thereby, the air ejected from the air ejection port flows smoothly along the peripheral wall. The circular shape is not limited to a true circular shape, but includes an oval shape, an elliptical shape, an oval shape, and the like.

  The opening edge of the surrounding wall of the enclosure part is provided with a seal part that hermetically contacts the mold surface of the mold. The seal portion prevents inflow of air into the enclosure portion, so that foreign matters in the enclosure portion are more efficiently removed.

  A plurality of the air ejection pipes are provided in the enclosure so as to project at intervals in the air circulation direction, and the tip of each air ejection pipe is in a horizontal plane substantially parallel to the mold surface of the mold. On the other hand, it is inclined and extended from the air outlet, and the inclination angle is alternately changed in the air circulation direction. According to this, since the flow of air ejected from the air ejection ports of the respective air ejection pipes is combined and adjusted to a condition suitable for the removal of foreign matter, the foreign matter attached to the product forming part is more effectively removed. be able to.

  A plurality of the product forming portions are provided on the mold surface of the mold, and the surrounding portion has a surrounding space that collectively surrounds the plurality of product forming portions. According to this, since the foreign matters attached to the plurality of product forming portions can be removed at one time in one step of performing the ejection and suction of air, the working efficiency is excellent. Moreover, since the enclosure part should just have the enclosure space which encloses a some product shaping | molding part collectively, it can apply to a multiple types of metal mold | die, and is excellent in versatility.

<Example>
An embodiment of the present invention will be described with reference to FIGS. The foreign matter removing apparatus 10 of the embodiment is for removing foreign matter such as shavings 50 and the like that have entered the cavity 61 as a product forming portion provided on the mold surface 63 of the mold 60 shown in FIG. As shown in FIG. 1, a hood-shaped enclosure 11, a pipe-shaped air suction pipe 12, and an air ejection pipe 13 are provided.

  As shown in FIG. 3, although not shown in detail, the foreign matter removing apparatus 10 includes an automatic lifting mechanism that lifts and lowers the enclosure 11 in a direction approaching and separating from the mold 60, and compressed air in the air ejection pipe 13. An air supply mechanism that sends out air (hereinafter referred to as air) and an air suction mechanism that sucks air in the enclosure 11 through the air suction pipe 12 are attached. The air suction mechanism is also provided with a dust collection mechanism that collects foreign matter sucked together with air.

  As shown in FIGS. 1 and 4, the mold 60 is formed by recessing a plurality of cavities 61 in a flat mold surface 63 as a whole, and the plurality of cavities 61 are formed in the front-rear direction (in FIG. 4). X direction) and left and right direction (Y direction in FIG. 4) are aligned. The metal mold 60 is assembled with an L-shaped terminal fitting 90 as an insert member. As shown in FIG. 5, a holding hole 62 into which the lower end portion of the terminal fitting 90 is inserted is provided on the bottom surface of the cavity 61, and a positioning groove in which the front end portion of the terminal fitting 90 is positioned on the upper end front surface of the cavity 61. 64 is provided extending forward. Accordingly, the terminal fitting 90 is set in the mold 60 while being held in the holding hole 62 and the positioning groove 64. When the terminal fitting 90 is set on the mold 60, the lower end portion of the terminal fitting 90 scrapes the bottom surface of the cavity 61 and the hole surface of the holding hole 62, so that the metal is attached to the sliding contact portion between the terminal fitting 90 and the mold 60. The shavings 50 which consist of a foreign material may arise, and in the case of an Example, it is possible to remove such the shavings 50 with the foreign material removal apparatus 10. FIG.

  The mold 60 is a lower mold, and the mold surface 63 is configured as an upper surface. At the time of molding, the upper surface (not shown) is brought into contact with the mold surface 63 of the mold 60 and the mold is closed, and then a molten resin is injected and filled between the cavity 61 of the mold 60 and the cavity 61 of the upper mold. After the resin is cured, the mold is removed and the product connector 70 is taken out.

  Thus, the connector 70 is in a form in which the terminal fitting 90 is inserted into the housing 80. As shown in FIG. 6, the bent portion of the terminal fitting 90 is covered with the housing 80, and the lower end portion and the front end portion of the terminal fitting 90 are disposed so as to be exposed to the outside of the housing 80. The connector 70 is configured as a primary molded product, and becomes a secondary molded product (final product) by further resin molding.

The foreign matter removing apparatus 10 is operated on the mold surface 63 of the mold 60 in a state where the terminal fitting 90 is set in the mold 60 before the mold is closed. Hereinafter, a specific structure will be described in the order of the enclosure part 11, the air suction pipe 12, and the air ejection pipe 13.
As shown in FIGS. 1 to 3, the enclosure 11 has a cylindrical shape as a whole, and includes a disk-shaped ceiling wall 14 and a peripheral wall 15 depending from the outer periphery of the ceiling wall 14. The inner peripheral surface of the peripheral wall 15 is formed in a circular shape in plan view so as to follow the air circulation described later. The lower end of the peripheral wall 15 is an opening edge that is circular in a bottom view, and a seal portion 16 is provided at the opening edge of the peripheral wall 15. The seal portion 16 is composed of an annular rubber ring, and is provided on the opening edge of the peripheral wall 15 over the entire circumference.

  Here, the enclosure part 11 is based on the raising / lowering operation by the automatic raising / lowering mechanism, and a standby position (see FIG. 1) that is separated from the mold 60 and a working position that approaches the mold 60 (see FIGS. ) And can be displaced. As shown in FIGS. 2 and 3, in the working position, the enclosure portion 11 is placed on the mold surface 63 of the mold 60, and the seal portion 16 is elastic with respect to the mold surface 63 of the mold 60 over the entire circumference. In addition, the enclosure 11 surrounds the plurality of cavities 61 together. The inside of the enclosure portion 11 is an enclosure space 17 and surrounds the plurality of cavities 61, and is configured with a volume sufficient to allow air flow to be described later.

  The air suction pipe 12 is a pipe connecting the peripheral wall 15 of the enclosure 11 and the air suction mechanism. As shown in FIG. 3, one end in the length direction communicates with the peripheral wall 15 and the other end in the length direction is It is configured to communicate with an air suction mechanism. As shown in FIG. 2, one end in the length direction of the air suction pipe 12 is configured as a circular air suction port 18 that opens in the peripheral wall 15 and faces the enclosure portion 11. The air suction port 18 is provided at a position facing the air circulation direction, which will be described later, in the enclosure 11 in the middle of the peripheral wall 15 in the height direction (vertical direction). The air suction tube 12 extends from the air suction port 18 toward the air suction mechanism substantially in parallel with the mold surface 63 of the mold 60.

  The air ejection pipe 13 is a pipe that is attached across the inside and outside of the enclosure 11, and as shown in FIG. 3, the length of one end of the air ejection pipe 13 faces downward in the enclosure 11 by protruding into the enclosure 11. It is configured as a small circular air outlet 19, and the other end in the length direction is configured to communicate with the air supply mechanism. The inner diameter of the air ejection pipe 13 is generally smaller than the inner diameter of the air suction pipe 12.

  Specifically, as shown in FIG. 2, the air ejection pipe 13 includes a cylindrical pipe body 21 that extends through the ceiling wall 14 and extends in the up-down direction, and a lower end of the pipe body 21 toward the air ejection port 19. Thus, it has a distal end portion 22 that extends with an acute inclination angle with respect to a horizontal plane 40 substantially parallel to the mold surface 63 of the mold 60. A substantially conical tapered nozzle portion 23 is provided at the distal end portion 22 of the air ejection pipe 13, and the tapered distal end opening of the tapered nozzle portion 23 serves as an air ejection port 19.

  Further, as shown in FIG. 4, a plurality of air ejection pipes 13 are provided at intervals in the circumferential direction substantially centering on the radial center of the enclosure 11 so as to correspond to the respective cavities 61. The air jets 19 of the respective air ejection pipes 13 flow from the air jets 19 so as to graze the respective cavities 61, and as a whole, form a circulation along the inner peripheral surface of the peripheral wall 15 of the enclosure 11. Direction (see the arrow direction in FIG. 4).

  In addition, the air ejection pipes 13 are arranged so that the inclination angles of the distal end portions 22 are alternately changed with respect to the circumferential direction (which is also the air circulation direction) as the arrangement direction thereof. Specifically, as shown in FIGS. 1 to 3, each air ejection pipe 13 includes a gently-inclined air ejection pipe 13 </ b> A in which the inclination angle (α in the figure) of the front end portion 22 is 15 degrees, and the front end portion 22. Is formed of a steeply inclined air jet pipe 13B having a slant angle (β in the figure) of 30 degrees, and a slowly inclined air jet pipe 13A and a steeply inclined air jet pipe 13B are arranged in the circumferential direction. They are arranged alternately.

  Of these, the gently-inclined air ejection pipe 13 </ b> A mainly has a configuration in which the air ejection port 19 is oriented in a direction in which air circulates along the inner peripheral surface of the peripheral wall 15. On the other hand, the steeply inclined air ejection pipe 13B has a configuration in which the air ejection port 19 is oriented in a direction slightly deviating from the air circulation direction toward the cavity 61. However, the height positions of the air outlets 19 are not substantially different between the gently-inclined air ejection pipe 13A and the steep-inclined air ejection pipe 13B, and are almost at the same position.

The above is the configuration of the foreign matter removing apparatus 10 according to the embodiment and the parts related thereto. Next, a foreign matter removing method using the foreign matter removing apparatus 10 will be described. In this foreign matter removing method, a setting process, an air ejection process, and an air suction process are executed.
[Set process]
As shown in FIG. 1, the terminal fitting 90 is set on the mold 60, and in this state, the enclosure portion 11 is spaced apart from the mold 60 and the enclosure portion 11 is placed at the standby position. Next, the enclosure portion 11 is lowered to the working position, and the seal portion 16 of the peripheral wall 15 is brought into close contact with the mold surface 63 of the mold 60 as shown in FIGS. Thereby, the enclosed space 17 of the enclosure part 11 is airtightly sealed from air | atmosphere.

[Air ejection process]
Subsequently, air is sent from the air supply mechanism to each air ejection pipe 13, and air is ejected from the air ejection port 19 of each air ejection pipe 13. Then, air is ejected from each air ejection port 19 with an ejection angle corresponding to each inclination angle (15 degrees or 30 degrees) in the enclosed space 17 of the enclosure portion 11, and then along the inner circumference of the peripheral wall 15. It flows around the respective cavities 61 and forms a circular flow along the circumferential direction with the center in the radial direction of the surrounding portion 11 as a center. Then, the shavings 50 adhering to the bottom surface of each cavity 61 of the mold 60 is wound on the circulating air.

[Air suction process]
Further, at the same time as the air supply mechanism is operated, the air suction mechanism is also operated. For this reason, the shavings 50 wound up are sucked toward the air suction port 18 and sucked by the air suction mechanism from the air suction port 18 through the air suction tube 12.

  Thus, the shavings 50 are discharged from the enclosed space 17 of the enclosure 11, and the entire foreign matter including the shavings 50 is removed from the mold surface 63 of the mold 60. In the case of the embodiment, since the flow of air ejected from the air ejection port 19 of each air ejection pipe 13 is adjusted so as to circulate along the inner peripheral surface of the peripheral wall 15, foreign matter hardly remains in the cavity 61. . In addition, since the air suction port 18 of the air suction pipe 12 is opened to the peripheral wall 15 instead of the ceiling wall 14, the air circulation along the inner peripheral surface of the peripheral wall 15 does not change suddenly, and the air is supplied to the air suction port. The air suction mechanism is quickly sucked from 18 through the air suction pipe 12.

  In particular, in the case of the embodiment, the air jet pipe 13A having a gentle inclination with a relatively gentle inclination angle of the front end portion 22 and the air jet pipe 13B having a steep inclination with a relatively steep inclination angle of the front end portion 22 are provided in the circumferential direction. Since they are arranged alternately, the air flow ejected from each air ejection pipe 13 acts in a composite manner on the cavity 61 of the mold 60, and foreign matter such as shavings 50 remains in the cavity 61. It has a difficult structure. In this regard, the foreign matter removal apparatuses 10 of Examples 1 to 3 and Comparative Examples 1 to 5 were manufactured below, and the foreign matter removal conditions of the respective foreign matter removal apparatuses 10 were evaluated.

[Example 1]
Example 1 is the foreign matter removing apparatus 10 described above. That is, the air jet pipe 13A having a gentle inclination with the inclination angle of the tip end portion 22 and the air injection pipe 13B having a steep inclination with the inclination angle of the tip end portion 22 arranged alternately in the circumferential direction, respectively. The air jet port 19 is oriented so that the air jetted from the air jet port 19 of the air jet pipe 13 is circulated along the peripheral wall 15 of the surrounding portion 11, and the air suction port is the peripheral wall 15 of the surrounding portion 11. The foreign matter removing apparatus 10 has a structure in which the air suction pipe extends substantially horizontally.

[Example 2]
In the foreign matter removing apparatus according to the second embodiment, a gently inclined air jet pipe having a tip inclination angle of 15 degrees and a steeply inclined air jet pipe having a tip inclination angle of 45 degrees are alternately arranged in the circumferential direction. Other parts are the same as those in the first embodiment.

[Example 3]
In the foreign matter removing apparatus of the third embodiment, the air ejection pipes whose inclination angles of the tip portions are all 15 degrees are arranged side by side in the circumferential direction, and the other portions have the same structure as the first embodiment.

[Comparative Example 1]
In the foreign matter removing apparatus of Comparative Example 1, the air suction port opens on the top wall of the enclosure, and the air suction tube extends vertically upward from the edge of the air suction port. The structure is the same.

[Comparative Example 2]
In the foreign matter removing apparatus of Comparative Example 2, the air suction port opens on the top wall of the enclosure, the air suction tube extends substantially vertically upward from the edge of the air suction port, and a plurality of air ejection tubes are disposed in the enclosure. Are arranged so as to extend substantially vertically in the vertical direction, the air outlets of the respective air outlet pipes are positioned so as to face the corresponding cavities, and other parts are the same as in the first embodiment. It is supposed to be.

[Comparative Example 3]
In the foreign matter removing apparatus of Comparative Example 3, the air suction port opens in the ceiling wall of the enclosure, and the air suction tube extends vertically from the edge of the air suction port, and among the plurality of air ejection tubes, Some of the air ejection pipes are arranged with the air jet outlets opened downward at the extension ends of the air jet pipes in the vertical direction, and the other air jet pipes are extended almost horizontally in the front-rear direction. Arranged with the air outlets opened laterally at the extended end, the air outlets of the air outlet pipes are positioned so as to face the corresponding cavities, and the other parts are the same as in the first embodiment. It is assumed that the structure.

[Comparative Example 4]
In the foreign matter removing apparatus of Comparative Example 4, the air suction port is opened in the ceiling wall of the enclosure, and the air suction tube extends substantially vertically upward from the edge of the air suction port. It is arranged in a state extending obliquely downward toward the air outlet in the enclosure, and the air outlet of each air outlet pipe is positioned so as to face the corresponding cavity, and the other parts are the same as in the first embodiment. The structure is the same.

[Comparative Example 5]
The foreign matter removing apparatus of Comparative Example 5 is a handy type air blow suction machine that substantially includes the main configuration of the apparatus described in Japanese Patent Laid-Open No. 2006-224245 shown in the background art, and is different from the above examples. , It does not have a portion corresponding to an enclosure that collectively surrounds the plurality of cavities.

[Evaluation]
For Examples 1 to 3 and Comparative Examples 1 to 5, the number of defective products in the own process was evaluated. Specifically, a case in which foreign matter such as shavings 50 is mixed in the housing 80 is regarded as a defective product, and the number of defective products in 15,000 samples was examined. The results are shown in Table 1.

  As is clear from Table 1, in Examples 1 to 3, in which the suction position of the air suction port is set on the peripheral wall and the flow of air ejected from the air ejection port is in a recirculating shape, the number of defective products is significantly reduced. Was. In addition, Embodiments 1 and 2 in which the gently inclined air ejection pipe and the steeply inclined air ejection pipe are alternately arranged in the range where the tip inclination angle (the inclination angle of the tip of the air ejection pipe with respect to the horizontal plane) is 45 degrees or less. Also in Comparative Example 1, the number of defective products was significantly reduced. Of course, in the case of the comparative example 1, since the suction position of the air suction port is set on the ceiling wall, the work time for removing the foreign matter takes as long as 10 seconds. In that respect, in Examples 1 to 3 in which the suction position of the air suction port was set on the peripheral wall, the work time could be completed in 2 seconds.

In each of the above examples, in Example 1 in which the gently inclined air ejection pipes 13A and the steeply inclined air ejection pipes 13B are alternately arranged in a range where the tip inclination angle is 30 degrees or less, the number of defective products is zero. Succeeded in doing.
As described above, by using the foreign matter removing apparatus according to the first to third embodiments, the foreign matter attached to the cavity 61 provided on the mold surface 63 of the mold 60 can be effectively removed. (Incidence rate) can be greatly reduced.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following aspects are also included in the technical scope of the present invention.
(1) Only one air ejection pipe may be provided in the foreign matter removing apparatus. However, when a plurality of product forming portions (cavities) are provided on the mold surface of the mold, it is preferable that at least two air ejection pipes are provided in the foreign matter removing apparatus.
(2) The air ejection pipe may have a configuration in which the air ejection port at one end in the length direction faces the inside of the enclosure by penetrating the peripheral wall instead of the ceiling wall. In this case, the air ejection pipe may be configured such that the entire portion including the tip portion in the enclosure is inclined with respect to a horizontal plane substantially parallel to the mold surface of the mold.
(3) Similarly to the air suction pipe, the air ejection pipe may have a configuration in which one end in the length direction communicates with the peripheral wall and the air ejection opening opens in the peripheral wall and faces the enclosure.
(4) The air suction pipe has a portion that protrudes into the enclosure, as in the case of the air ejection pipe, and is arranged so that one end in the length direction of this protrusion faces the enclosure as an air suction port. Also good.
(5) The inclination angle of the tip of the air ejection pipe may be different for each air ejection pipe.
(6) The distal end portion of the air ejection pipe may not be extended linearly at a constant inclination angle but may be extended in a curved shape while changing the inclination angle.

DESCRIPTION OF SYMBOLS 10 ... Foreign substance removal apparatus 11 ... Enclosure 12 ... Air suction pipe 13 ... Air ejection pipe 13A ... Slowly inclined air ejection pipe 13B ... Steeply inclined air ejection pipe 14 ... Ceiling wall 15 ... Peripheral wall 16 ... Sealing part 17 ... Surrounding space DESCRIPTION OF SYMBOLS 18 ... Air suction port 19 ... Air ejection port 22 ... Tip part (of an air ejection pipe) 40 ... Horizontal surface 60 ... Mold 61 ... Cavity (product molding part)
80 ... Housing 90 ... Terminal fitting (insert member)

Claims (7)

A foreign matter removing device for removing foreign matter attached to a product molding portion provided on a mold surface of a mold,
An enclosure installed on the mold surface of the mold so as to surround the product molding part;
An air ejection pipe that orients the air ejection port so that the air ejected from the air ejection port that faces the enclosure portion flows along the peripheral wall of the enclosure portion;
A foreign matter removing apparatus comprising: an air suction pipe for sucking the air in the enclosure through an air suction port that opens in a peripheral wall of the enclosure.   The foreign matter removing apparatus according to claim 1, wherein a cross section of the peripheral wall of the enclosure portion along the air circulation direction is circular.   The foreign matter removing apparatus according to claim 1, wherein a seal portion that is in airtight contact with a mold surface of the mold is provided at an opening edge of the peripheral wall of the enclosure portion. The air ejection pipes are provided in the enclosure so as to protrude in a plurality with an interval in the air circulation direction.
The tip of each of the air ejection pipes extends with an inclination from the air ejection outlet with respect to a horizontal plane substantially parallel to the mold surface of the mold, and the inclination angle changes alternately in the air circulation direction. The foreign matter removing device according to claim 1, wherein the foreign matter removing device is disposed on the outside.   The product molding part is provided in a plurality on the mold surface of the mold, and the surrounding part has a surrounding space that collectively surrounds the plurality of product molding parts. The foreign matter removing apparatus according to any one of 4. A foreign matter removal method for removing foreign matter attached to a product molding portion provided on a mold surface of a mold,
A setting step of installing a surrounding part on a mold surface of the mold so as to surround the product molding part;
Subsequent to the setting step, air is supplied into an air jet pipe facing the inside of the enclosure, and the air is ejected from the air jet so as to form a circulating flow along the peripheral wall of the enclosure. An air ejection process;
A foreign matter removing method comprising: an air suction step of sucking the air in the enclosure portion through an air suction port opening in a peripheral wall of the enclosure portion simultaneously with the air ejection step.   The foreign matter removal method according to claim 6, wherein the foreign matter is a metallic foreign matter that is generated when a terminal fitting is set in the mold.

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