JP5673440B2 - Vacuum mold - Google Patents

Description

  The present specification discloses a reduced pressure molding die used in a reduced pressure molding method in which a molding space that has been decompressed is filled with a material and molded.

Using a first mold (for example, a movable mold) and a second mold (for example, a fixed mold) that can move relative to each other, a sealed molding space is created by closing the first mold and the second mold, and the molding space is decompressed. There is known a reduced pressure molding method in which a reduced pressure molding space is filled with a substance and the substance is cured in the molding space. When the material is cured and a molded product molded into the shape of the molding space is obtained, the molded product is removed from the molding space.
If a molten metal is used as the material to be filled, a cast product is formed, and if a molten resin is used, a plastic product is formed.

  In order to form a complicated shape, there is a case where a mold having a slide portion that is slidable with respect to the mold body is used. In the present specification, the side on which the slide portion is prepared is referred to as a first type. If the slide part is prepared in the movable mold, the movable mold is the first mold, and in this case, the fixed mold is the second mold. If the slide part is prepared in the fixed mold, the fixed mold is the first mold, and in this case, the movable mold is the second mold.

There may be a case where a plurality of slide portions that are slidable with respect to the mold body are prepared. When each slide part is advanced, adjacent slide parts may come into contact with each other to help seal the molding space. In this specification, the positional relationship in which adjacent slide portions abut each other is referred to as a forward position. When the first mold and the second mold in which each slide portion is in the forward position are brought into contact with each other, a molding space closed by the first mold body, the plurality of slide portions, and the second mold is completed. It is not limited to the process of completing a closed molding space. The closed molding space may be completed by abutting the first mold and the second mold with the slide portion in the forward position, or after the first mold body and the second mold abut, It may be advanced to complete the molding space.
When the first mold and the second mold are separated from each other, the molding space is released to the outside and the molded product can be taken out. The first mold and the second mold may be separated after the slide part is retracted, or the slide part may be retracted after the first mold and the second mold are separated.

  When the slide portion is provided, the slide portion is slidable with respect to the first mold main body and must be sealed between the two during advancement. Even abutting surfaces between adjacent slide parts can be abutted and separated, and at the time of abutting, the two must be sealed. The relationship between the slide portion and the second type is the same, and can be abutted and separated, and at the time of abutting, both must be sealed.

  Careful consideration is required in the arrangement of the seal member in order to obtain a sealed relationship between the surfaces that can be contacted and separated.

  Patent Document 1 discloses a technique for sealing a molding space with a first mold and a second mold each having a slide portion. The technique is schematically shown in FIG. FIG. 10 conceptually shows the technical idea of Patent Document 1, and is modified from Patent Document 1.

Reference numeral 10 is a fixed type, and corresponds to the second type in this specification. Reference numeral 20 is a movable type and includes a movable main body 22 and a slide portion 30. This corresponds to the first type in the present specification.
The movable body 22 is formed with a guide groove 23 that guides the slide portion 30 in a slidable manner. A flange portion 31 is formed at the outer mold end of the slide portion 30. The slide portion 30 can be advanced until the flange portion 31 abuts against the side surface of the movable body 22. If the movable mold 20 is moved toward the fixed mold 10 in a state where the collar portion 31 of the slide portion 30 has advanced until it contacts the side surface of the movable mold body 22, the molding space 70 is formed. . The molding space 70 is closed by the movable mold body 22, the slide portion 30, and the fixed mold 10.

  In order to improve the sealing degree of the molding space 70, a seamless seal member 18 is disposed on the lower surface of the fixed mold 10. FIG. 10 shows the position of the seal member 18 in a state where the fixed mold 10 is in contact with the movable mold main body 22. The seal member 18 traverses in contact with the upper surface of the slide portion 30, and makes a round of the guide groove 23 and the molding space 70.

A seal member 32 surrounding the slide portion 30 is disposed on the inner surface of the flange portion 31. The seal member 32 exposes the end surfaces 34 and 36 at the same height as the upper surface of the flange portion 31.
When the movable mold 20 and the fixed mold 10 are brought into contact with each other in a state where the collar portion 31 has advanced until it comes into contact with the side surface of the movable mold main body 22, the end surface 34 of the seal member 32 is brought into contact with the seal member 18 at a position indicated by reference numeral 14. The end surface 36 of the seal member 32 contacts the seal member 18 at a position indicated by reference numeral 16. The molding space 70 is sealed from the outside of the mold by the seal member 18 and the seal member 32 in contact with the seal member 18.

JP-A-2005-219918

  The seal member 32 used in the prior art is not seamless and extends from the end surface 34 to the end surface 36. When the seal member 32 is not seamless, the length of the seal member 32 is shortened due to a change with time. In a relatively short period of time, the end surface 34 of the seal member 32 does not contact the seal member 18, and the end surface 36 of the seal member 32 does not contact the seal member 18. In the prior art, the sealing degree of the molding space 70 decreases in a short period of time, and the sealing member 32 must be frequently replaced.

  The present specification discloses a technique for improving the sealing degree of a molding space closed by a first mold body, a plurality of slide portions, and a second mold by using a seamless seal member.

The present specification discloses a reduced-pressure mold for filling a molding space that has been decompressed with a substance. The decompression mold includes a first mold and a second mold. The first mold is provided with a plurality of slide portions that are slidable with respect to the first mold body, and is set in such a relationship that adjacent slide portions abut each other when each slide portion is advanced. The first mold and the second mold can be moved relative to each other. When the first mold and the second mold are brought into contact with each other, the first mold body, the plurality of slide sections, and the second mold are in contact with each other. A molding space closed by the mold is completed. When the first mold and the second mold are separated from each other, the molding space is released to the outside and the molded product can be taken out. As described above, the side on which the slide portion is prepared is referred to as a first mold. If the slide part is prepared in the movable mold, the movable mold is the first mold, and if the slide part is prepared in the fixed mold, the fixed mold is the first mold.
In the decompression mold disclosed in the present specification, a seamless seal that makes a round of contact between the contact surface of the first mold body and the contact surface of the adjacent slide portion and the contact surface of the second mold is provided on each slide portion. The member is arranged. When each slide part is in the forward movement position, the seal members arranged on the contact surface with the adjacent slide part come into contact with each other.

  A seamless seal member is disposed on each slide portion so as to go around the contact surface between the contact surface with the first mold body and the adjacent slide portion and the contact surface with the second mold. When the positional relationship is established in which the seal members arranged on the contact surface with the adjacent slide portion come into contact with each other when the head moves forward, the first die body, the plurality of slide portions at the forward movement position, and the second die The gap between the closed molding spaces, that is, the gap between the slide part and the first mold body, the gap between the adjacent slide parts, and the gap between the slide part and the second mold are seal members. Sealed. As a result, the sealing degree of the molding space is greatly improved. Moreover, each seal member is seamless, and the length of the seal member does not shrink during use, and there is no gap between the seal member and the seal member. The sealing degree of the molding space is improved and the maintenance burden is reduced.

  It is preferable that the contact surfaces of the slide portions are inclined in a direction that becomes narrower toward the tip. In this case, when the adjacent slide parts are brought into contact with each other, the degree to which the seal members arranged on the contact surfaces rub can be reduced, and the life of the seal member can be prolonged.

The seal member disclosed in the present specification continuously extends from the contact surface with the adjacent slide portion to the contact surface with the second mold. Therefore, the seal member bends at a position where the contact surface moves from the contact surface to the contact surface, and a curve is generated on the seal surface of the seal member (so-called R is generated). The curve may become a gap and impair the sealing degree.
In order to obtain a further degree of sealing, it is preferable that a protrusion that follows a curve generated when the seal member is bent is formed on the second mold at a position corresponding to the transition position in each slide portion.
If the protrusion is formed on the second mold, the second mold is closely attached to the curved sealing surface of the seal member without gap when the molding space is closed by the second mold. The sealing degree of the molding space is further increased.

According to the decompression molding apparatus disclosed in the present specification, since the seamless seal member is used, the length of the seal member is not shortened and a gap is not generated between the seal members, and the maintenance load of the seal member is reduced. Is reduced. In addition, no seal member is disposed on the first mold body or the second mold, and the seal member is disposed only on the slide portion. Each slide part is small and easy to handle, and the replacement work of the seal member is facilitated. According to the reduced pressure molding apparatus disclosed in the present specification, the degree of sealing of the molding space is high, and a gas entrainment phenomenon that occurs during molding can be suppressed. The quality of the molded product is also improved.
If the abutting surfaces of the slide portions are inclined in a direction that narrows toward the tip, the life of the seal member can be prolonged.
Further, if the second mold is formed with a projection that follows R of the seal member, the sealing degree of the molding space is further improved, and the quality of the molded product is further improved.

The pressure-reduction shaping | molding die of Example 1 of a state which has a slide part in an advance position and the 1st type | mold and 2nd type | mold are in the position which left | separated is shown typically. The 1st type | mold of the state which extracted the slide part from the 1st type | mold main body is shown typically. The positional relationship of a 1st type | mold main body, molding space, and a sealing member is shown typically. The curve which arises in the sealing member continuously extended from the contact surface with an adjacent slide part to the contact surface with a 2nd type | mold is shown typically. The relationship between the curve which arises in a sealing member and the protrusion currently formed in the 2nd type is shown. The position of the protrusion formed in the second mold is shown. The 1st type | mold of Example 2 which has a slide part in an advance position is shown typically. The position of the protrusion currently formed in the 2nd type | mold of Example 2 is shown. The slide part is extracted from a 1st type | mold main body, and the pressure reduction shaping | molding die of Example 3 in the state which exists in the position which the 1st type | mold and the 2nd type | mold separated is shown typically. The conventional pressure-reduction mold is typically shown.

The main features of the embodiments shown below are listed.
(Feature 1) The molten metal is filled in the molding space. It is a vacuum casting mold.
(Characteristic 2) At the tip portion of the slide surface of the slide portion with the first type main body, the slide portion is inclined so as to become narrower toward the tip.
(Characteristic 3) The inclined surface which contacts the inclined surface of the characteristic 2 is provided in the 1st type | mold main body of the position corresponding to the front-end | tip of the slide part in an advance position.
(Feature 4) A seal member is disposed on the inclined contact surface of Feature 2.
(Feature 5) The seal member arranged on the slide surface of the slide portion with the first type main body does not contact the first type main body when the slide portion slides.

  FIG. 1 shows a movable mold (first mold embodiment) 20 in which slide portions 30, 40, 50, 60 are in an advanced position with respect to a movable mold body (first mold body embodiment) 22, and a fixed mold (first embodiment). A second example 10) is schematically shown. When the movable mold 20 is brought into contact with the fixed mold 10, the movable mold main body 22, the slide portions 30, 40, 50, 60 and the molding space 70 closed by the fixed mold 10 are obtained. The fixed mold 10 is provided with a cylinder 12, and the cylinder 12 communicates with the molding space 70.

  With the molding space 70 closed, the molding space 70 is depressurized from the cylinder 12 to remove the gas remaining in the molding space 70. The molten metal is filled into the molding space 70 in a decompressed state from the cylinder 12. The metal filled in the molding space 70 is cooled and hardened to become a cast product. The vacuum mold of FIG. 1 is a vacuum casting mold.

  FIG. 1 is illustrated in such a manner that the stationary mold 10 is disposed above the movable mold 20 for clarity of illustration. Actually, the fixed mold 10 and the movable mold 20 may be arranged on the left and right, or the fixed mold 10 may be arranged below the movable mold 20. The arrangement relationship between the fixed mold 10 and the movable mold 20 is not limited.

FIG. 2 schematically shows the movable mold 20 in a state where the slide portions 30, 40, 50, 60 are extracted from the movable mold body 22.
The movable body 22 is provided with a groove 23 that guides the slide portion 30 in a slidable manner. Similarly, a groove 24 for slidably guiding the slide part 40, a groove 25 for slidably guiding the slide part 50, and a groove 26 for slidably guiding the slide part 60 are formed.
The slide portion 30 is guided by the guide groove 23 and moves forward to the advance position shown in FIG. 1, the slide portion 40 is guided by the guide groove 24 and moves forward to the advance position shown in FIG. When guided and advanced to the advanced position shown in FIG. 1 and the slide portion 60 is guided by the guide groove 26 and advanced to the advanced position shown in FIG. 1, the bottom surface is closed by the movable body 22, and the four side surfaces are the slide portions 30. , 40, 50, 60, a closed space 70 is formed. In this state, when the movable mold 20 and the fixed mold 10 come into contact with each other, the upper surface of the space 70 is closed by the fixed mold 10. Inside the movable mold 20 and the fixed mold 10, a movable mold main body 22, slide parts 30, 40, 50, 60 and a molding space 70 closed by the fixed mold 10 are secured.

  The fixed die 10 is formed with a cylinder 12 that communicates with the molding space 70. When the molding space 70 is closed by the movable mold body 22, the slide portions 30, 40, 50, 60 and the fixed mold 10, when the suction is performed from the cylinder 12, the molding space 70 is decompressed and exists in the molding space 70. Gas or the like is removed from the molding space 70. In this state, the molding space 70 is filled with molten metal. Since gas or the like is removed from the molding space 70 before filling, gas or the like is not caught in the molten metal filling the molding space 70. A cast product with few defects can be formed.

  In order to sufficiently depressurize the molding space 70, it is necessary to increase the sealing degree of the molding space 70. In the molding space 70, there are gaps between the slide parts 30, 40, 50, 60 and the movable mold body 22, gaps between the slide parts 30, 40, 50, 60 and the fixed mold 10, slide parts 30, 40, 50. , 60 communicate with each other, and in order to increase the sealing degree of the molding space 70, it is necessary to seal these gaps with a seal member.

  In order to seal the periphery of the molding space 70, a seal member 39 is disposed on the slide portion 30, a seal member 49 is disposed on the slide portion 40, and a seal member 59 is disposed on the slide portion 50. A seal member 69 is disposed on the slide portion 60.

  The seal member 39 disposed on the slide portion 30 extends over the four side surfaces on the distal end side of the slide portion 30. That is, the portion 32 of the slide portion 30 that crosses the contact surface 31 with the fixed mold 10, the portion 34 that crosses the contact surface 33 of the slide portion 60, and the contact of the movable mold body 22. A portion 36 (shown in FIG. 3 to be described later) traversing the surface 35 (not shown in FIG. 2) and a contact surface 37 (not shown in FIG. 2) with the slide portion 40 are traversed. Part 38 (shown in FIG. 3 to be described later). The seal member 39 includes a portion 32 crossing the contact surface 31 with the fixed mold 10, a portion 34 crossing the contact surface 33 with the slide portion 60, and a contact surface with the movable mold body 22. A portion 36 that crosses 35 and a portion 38 that crosses the contact surface 37 with the slide portion 40 are continuous and seamless. The seamless seal member 39 makes a round over the four side surfaces on the distal end side of the slide portion 30.

  The seal member 59 disposed on the slide portion 50 is similar to the seal member 39. The seal member 59 also crosses a portion 52 that crosses the contact surface 51 of the slide portion 50 with the fixed mold 10 and a contact surface 53 (not shown in FIG. 2) of the slide portion 40. A portion 54 (shown in FIG. 3 to be described later), a portion 56 (shown in FIG. 3 to be described later) crossing a contact surface 55 (not shown in FIG. 2) with the movable mold body 22, and a slide portion A portion 58 is provided that crosses the abutment surface 57 with 60. The seal member 59 includes a portion 52 that crosses the contact surface 51 with the fixed mold 10, a portion 54 that crosses the contact surface 53 with the slide portion 40, and a contact surface with the movable mold body 22. A portion 56 crossing 55 and a portion 58 crossing the contact surface 57 with the slide portion 60 are continuous and seamless. The seamless seal member 59 makes a round over the four side surfaces on the distal end side of the slide portion 50.

  The seal member 49 disposed on the slide portion 40 extends over four surfaces that come into contact with other mold members. That is, a portion 42 that crosses the contact surface 41 with the fixed mold 10, a portion 44 that crosses the contact surface 43 with the slide portion 30, and a contact surface 45 (see FIG. 2 (not shown in FIG. 2), and a portion 48 that crosses the contact surface 47 with the slide portion 50. The seal member 49 includes a portion 42 crossing the contact surface 41 with the fixed mold 10, a portion 44 crossing the contact surface 43 with the slide portion 30, and a contact surface with the movable mold body 22. The portion 46 crossing 45 and the portion 48 crossing the contact surface 47 with the slide portion 50 are continuous and seamless. The seamless seal member 49 makes a round over the four surfaces on the distal end side of the slide portion 40. The slide portion 40 abuts the fixed mold 10 at the upper surface 41, abuts the slide portion 30 at the distal end surface 43, abuts the movable mold body 22 at the lower surface 45, and abuts the slide portion 50 at the distal end surface 47. The seal member 49 returns from the upper surface 41 of the slide portion 40 to the upper surface 41 through the distal end surface 43, the lower surface 45, and the distal end surface 47.

The seal member 69 disposed on the slide portion 60 is the same as the seal member 49. The seal member 69 also includes a portion 62 that crosses the contact surface 61 with the fixed mold 10 and a portion 64 that crosses the contact surface 63 (not shown in FIG. 2) with the slide portion 50 (not shown in FIG. 2). 3), a portion 66 (shown in FIG. 3) crossing a contact surface 65 (not shown in FIG. 2) with the movable body 22, and a contact surface 67 with the slide portion 30. A transverse portion 68 (shown in FIG. 3) is provided. The seal member 69 includes a portion 62 that crosses the contact surface 61 with the fixed mold 10, a portion 64 that crosses the contact surface 63 with the slide portion 50, and a contact surface with the movable mold body 22. A portion 66 crossing 65 and a portion 68 crossing the contact surface 67 with the slide portion 30 are continuous and seamless. The seamless seal member 69 makes a round over the four surfaces on the distal end side of the slide portion 60. The slide portion 60 abuts the fixed mold 10 at the upper surface 61, abuts the slide portion 50 at the tip surface 63, abuts the movable mold body 22 at the bottom surface 65, and abuts the slide portion 30 at the tip surface 67. The seal member 69 returns from the upper surface 61 of the slide portion 60 to the upper surface 61 around the distal end surface 63, the lower surface 65 and the distal end surface 67.
Although not shown, each of the seal members 39, 49, 59, 69 is a rubber material having a circular cross section, and the seal members 39, 49, 59, 69 follow the slide portions 30, 40, 50, 60. A groove having a square cross section is formed along the path. A path along which the seal members 39, 49, 59, and 69 extend is managed by the groove.

  FIG. 3 shows the positional relationship between the molding space 70 and the seal members 39, 49, 59, and 69 when the molding die is closed. It can be seen that there is a positional relationship in which the seal portions arranged on the surface where the slide portions come into contact with each other. That is, the seal portion 34 contacts the seal portion 68, the seal portion 64 contacts the seal portion 58, the seal portion 54 contacts the seal portion 48, and the seal portion 44 contacts the seal portion 38.

  As apparent from FIG. 3, the periphery of the molding space 70 is completely closed by the seal members 39, 49, 59 and 69. That is, in the molding space 70, the gap between the fixed mold 10 and the movable mold body 22, the gap between the slide parts 30, 40, 50, 60 and the movable mold body 22, the slide parts 30, 40, 50, 60 and When the gap between the fixed molds 10 and the gap between the slide portions 30, 40, 50, 60 communicate with each other, the seal members 39, 49, 59, 69 seal all of these gaps. Yes. The sealing members 39, 49, 59, and 69 greatly enhance the sealing degree of the molding space 70.

The seal member has a property that its length shrinks due to aging. Since the seal members 39, 49, 59, and 69 are seamless, the length does not shrink and a gap is not generated. The lifetime of the sealing members 39, 49, 59, 69 is long.
In the present embodiment, no seal member is required for the movable mold body 22 and the fixed mold 10. Seal members 39, 49, 59, 69 are arranged on the slide portions 30, 40, 50, 60. The slide portions 30, 40, 50, 60 can be taken out from the movable main body 22. With the slide portions 30, 40, 50, 60 removed from the movable body 22, the replacement work of the seal members 39, 49, 59, 69 can be performed. The replacement work of the seal members 39, 49, 59, 69 is simplified.

In FIG. 4, the seal member 49 arranged on the slide portion 40 extends from the portion 42 extending along the contact surface 41 with the fixed mold 10 along the contact surface 43 with the slide portion 30. The part which transfers to the part 44 which has been shown is shown. Further, the seal member 39 disposed on the slide portion 30 extends from the portion 32 extending along the contact surface 31 with the fixed mold 10 along the contact surface 37 with the slide portion 40. The part which transfers to 38 is shown. For clarity of illustration, the slide portion 30 is not shown.
Since the seal member is seamless, it is bent at a position where the seal member moves from surface to surface, and the seal surface is curved. Therefore, as shown in FIG. 5, when the slide portion 40 and the slide portion 30 are brought into contact with each other, a valley-like recess 90 is formed at the boundary between the seal member 49 and the seal member 39. In order to improve the sealing degree of the molding space 70, it is preferable to close the recess 90.
In the present embodiment, a protrusion 19 having a shape following the recess 90 is formed on the lower surface of the fixed mold 10. Since the projection 19 closes the valley-like depression 90 generated at the boundary between the seal member 49 and the seal member 39, the sealing degree of the molding space 70 is further improved.

  The valley-like depression 90 occurs at the boundary between the seal portions 34 and 68, the boundary between the seal portions 64 and 58, the boundary between the seal portions 54 and 48, and the boundary between the seal portions 44 and 38. As shown in FIG. 6, the protrusion 19 that closes the recess 90 is formed at the position of the four boundaries.

  In the boundary between the seal portions 34 and 68, the boundary between the seal portions 64 and 58, the boundary between the seal portions 54 and 48, and the boundary between the seal portions 44 and 38, a dent is generated on the side in contact with the movable body 22. The movable body 22 is preferably formed with protrusions for closing the recesses at the positions of the four boundaries.

  FIG. 7 shows another embodiment of the slide portions 30, 40, 50, 60. An inclined surface is formed at the boundary between the front end surface and the side surface of each of the slide portions 30, 40, 50, 60 and is inclined in a direction that narrows toward the front end. The inclined surfaces are in contact with each other. The inclined surface is a contact surface. Each seal member returns from the upper surface to the upper surface following the right inclined surface, the lower surface, and the left inclined surface. Also in this embodiment, each of the seal members 39, 49, 59, 69 is seamless.

  When the seal members 39, 49, 59, and 69 follow the right inclined surface and the left inclined surface of the slide portions 30, 40, 50, and 60, the slide portions 30, 40, 50, and 60 are sliding. The sealing members 39, 49, 59, and 69 are not rubbed against the movable body 22. If the right side surface and the left side surface of the slide parts 30, 40, 50, 60 are not inclined, the seal members 39, 49, 59, 69 are used while the slide parts 30, 40, 50, 60 are sliding. In FIG. 7, the side surface of the movable main body 22 that is hatched is rubbed and consumed. Further, when the seal members 39, 49, 59, 69 follow the right inclined surface and the left inclined surface of the slide portions 30, 40, 50, 60, the seal members 39 and 49, 49 and 59, 59 and 69, Neither 69 nor 39 rub. When the slide portions 30, 40, 50, 60 reach the advanced position, the seal members 39 and 49, 49 and 59, 59 and 69, and 69 and 39 are compressed. The lifetime of the seal members 39, 49, 59, 69 is further extended.

  An inclined surface that is inclined in a direction that narrows toward the tip may be formed at the boundary between the tip surface and the bottom surface (slide surface with the movable main body 22) of each slide portion 30, 40, 50, 60. . In this case, the movable main body 22 at a position corresponding to the inclined surface of the slide portions 30, 40, 50, 60 at the forward movement position is provided with an inclined surface that contacts the inclined surface of the slide portions 30, 40, 50, 60. Keep it. Further, the seal members 39, 49, 59, and 69 are arranged at positions that cross the inclined surfaces. In this case, since the seal members 39, 49, 59, and 69 are disposed on the inclined surfaces, the seal members 39, 49, 59, and 69 do not contact the movable main body 22 while the slide portions 30, 40, 50, and 60 are sliding. When the slide portions 30, 40, 50, 60 reach the advanced position, the seal members 39, 49, 59, 69 are pressed against the inclined surface on the movable body 22 side and compressed. The lifetime of the seal members 39, 49, 59, 69 is further extended.

  Also in this embodiment, a recess is formed between the seal members at the boundary between the slide portions 30 and 40, the boundary between the slide portions 40 and 50, the boundary between the slide portions 50 and 60, and the boundary between the slide portions 60 and 30. Also in the present embodiment, as shown in FIG. 8, a protrusion 19 is formed on the inner surface of the fixed mold 10 to close the dent generated between the seal members. In the case of the present embodiment, the valley streaks formed between the seal members extend in the diagonal direction of the molding space 70. In order to cope with this, the ridgeline of the protrusion 19 extends in the diagonal direction of the molding space 70.

  FIG. 9 shows an embodiment of a mold comprising two slide parts 30, 50. Also in this embodiment, the sealing member 59 disposed on the slide portion 50 extends along the contact surface 53 with the fixed mold 10 and the contact surface 53 with the slide portion 30. Between the sliding portion 30 and the portion 56 (not shown in FIG. 9) crossing the contact surface 55 (not shown in FIG. 9) of the movable portion 22 A portion 58 extending along the surface 57 is provided. Similarly, the seal member 39 disposed on the slide portion 30 includes a portion 32 extending along the contact surface 31 with the fixed mold 10 and a contact surface 33 (shown in FIG. 9) with the slide portion 50. A portion 34 extending along (not shown), a portion 36 (not shown in FIG. 9) traversing a contact surface 35 (not shown in FIG. 9) with the movable body 22; A portion 38 (not shown in FIG. 9) extending along the contact surface 37 (not shown in FIG. 9) with the slide portion 30 is provided. Seal portion 58 contacts seal portion 33 and seal portion 54 contacts seal portion 38. Also in this embodiment, the slide portion 30 is brought into contact with the slide portion 50 from the contact surface 31 with the fixed mold 10 to the contact surface 33 with the other slide portion 50, the contact surface 35 with the movable body 22. A seamless sealing member 39 that makes a round of the surface 37 is used. Further, on the slide portion 50, a contact surface 53 with the other slide portion 30, a contact surface 55 with the movable body 22, and a contact surface 57 with the slide portion 30 are provided. A seamless sealing member 59 is used. Thereby, the sealing degree of the molding space 70 is increased.

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

10: Fixed type (second type)
12: Tube 19: Protrusion 20: Movable type (first type)
22: Movable mold body 23, 24, 25, 26: Guide grooves 30, 40, 50, 60: Slide portions 39, 49, 59, 69: Seal member 70: Molding spaces 31, 41, 51, 61: Fixed mold Contact surfaces 32, 42, 52, 62: seal portions 33, 37, 43, 47, 53, 57, 63, 67 extending along the contact surface with the fixed mold: contact surfaces 34 with the slide portion, 38, 44, 48, 54, 58, 64, 68: Seal portions 35, 45, 55, 65 extending along the contact surface with the slide portion: Contact surfaces 36, 46, 56, 66 with the movable body : Sealing part 90 extending along the contact surface with the movable body 90: Indentation

Claims (3)

It is a reduced pressure mold for filling a molding space that has been decompressed with a substance,
It has a first mold and a second mold,
The first mold is provided with a plurality of slide parts that are slidable relative to the first mold body, and when each slide part is advanced, adjacent slide parts come into contact with each other,
The first and second molds are relatively movable,
When the first mold and the second mold in which each slide part is in the forward position are brought into contact with each other, a molding space closed by the first mold body, the plurality of slide parts, and the second mold is completed,
When the first mold and the second mold are separated, the molding space is released to the outside and the molded product can be taken out.
A seamless seal member is disposed on each slide portion so as to go around the contact surface between the contact surface with the first mold body and the adjacent slide portion and the contact surface with the second mold. A pressure-reducing mold characterized in that seal members arranged on contact surfaces with adjacent slide portions come into contact with each other when in the forward position.   2. The pressure-reducing mold according to claim 1, wherein the abutting surfaces of the slide portions are inclined in a direction of becoming narrower toward the tip.   A curve generated when the seal member is bent to the second mold at the position corresponding to the position of transition from the contact surface with the adjacent slide portion to the contact surface with the second mold in each slide portion at the forward movement position. 3. A reduced pressure molding die according to claim 1 or 2, wherein a copying projection is formed.

Images