JP2014201049A - Vacuum molding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum molding apparatus capable of molding, favorably and integrally, a resin product equipped with ribs.SOLUTION: The provided vacuum molding apparatus 1 furnished with a molding mold 2 and capable of integrally molding a resin product equipped with a base portion and ribs configured uprightly on the base portion additionally possesses: a preform rib molding means for configuring, by suctioning a moldable resin sheet S onto the suction surface of the molding mold 2, preform ribs S2 each having a width greater than a specified rib width uprightly atop a preform base portion S1; and a slide means 14 mobile along the width direction of the preform ribs S2 and capable of forming ribs having the desired width by pressing the preform ribs S2 along the width direction thereof.

Description

  The present invention relates to a vacuum forming apparatus.

  A vacuum forming apparatus is known as an apparatus for integrally molding a resin product (see Patent Document 1). The vacuum forming apparatus is an apparatus for forming by adsorbing a resin sheet to a forming die.

  Here, a case where a resin product having a base portion and a rib standing on the base portion is integrally formed using a vacuum forming apparatus will be considered. FIG. 11 is a schematic view showing a case of manufacturing a resin product using a conventional vacuum forming apparatus, where (a) shows before molding and (b) shows after molding. Here, a case where a rib having a small width (plate thickness) and a large height is formed is illustrated.

  As shown in FIG. 11A, the conventional vacuum forming apparatus 100 is mainly composed of a plug 101, a forming die 111, and a vacuum pump (not shown). The plug 101 includes an erecting portion 102 that erects perpendicularly to the plug 101. The molding die 111 is formed with a concave groove portion 112 having a rectangular cross section and a plurality of suction holes 113 connected to a vacuum pump. When the resin of the resin sheet S enters the recessed groove portion 112, a rib is formed.

JP 2009-39862 A

  When a rib having a small width and a large height is formed, the width of the concave groove portion 112 is elongated accordingly. Therefore, it is difficult to adsorb the resin sheet S on the surface of the concave groove portion 112 only by suction of the vacuum pump. It becomes. Therefore, for example, it is conceivable to push the resin sheet S by the standing portion 102 of the plug 101 and feed the resin into the concave groove portion 112. However, as shown in FIG. There is a possibility that the resin sheet is pulled between the installation part 102 and the resin sheet S is broken. Even if the groove 112 can be sucked, there is a problem in that a space leading to the outside is formed as the standing portion 102 is retracted.

  The present invention has been created to solve such problems, and an object of the present invention is to provide a vacuum forming apparatus capable of suitably integrally forming a resin product having a rib.

  In order to solve the above-mentioned problems, the present invention is a vacuum forming apparatus including a molding die, which can integrally mold a resin product including a base and a rib standing on the base, and is a moldable resin By sucking the sheet to the suction surface of the mold, a preliminary rib forming means for standing on the preliminary base and forming a preliminary rib having a width larger than the desired width of the rib; and in the width direction of the preliminary rib And a slide means for forming the rib having a desired width by pressing the preliminary rib from the width direction.

  According to this structure, after forming the preliminary | backup rib larger than a desired rib, a rib can be formed by pressing the said preliminary | backup rib to the width direction using a slide means. Thereby, the resin product provided with the rib of the desired width can be easily integrally formed. Since the spare rib is wider than the desired rib, it is easy to mold, and breakage of the resin sheet during molding can be avoided. In addition, by pressing the preliminary rib in the width direction, it is possible to avoid the formation of a gap communicating with the outside in the rib.

  Further, the preliminary rib forming means includes a concave groove portion formed to be larger than a desired rib width in a part of the suction surface, and sucks the resin sheet to the groove surface of the concave groove portion and the suction surface. It is preferable to form the preliminary rib.

  According to this configuration, the resin sheet is adsorbed to the concave groove portion, and the preliminary rib can be formed. Since the concave groove has a width larger than the desired width of the rib, the resin sheet can be easily adsorbed on the groove surface of the concave groove. Moreover, since the width | variety of a recessed groove part is large, the fracture | rupture of a resin sheet can be avoided.

  Further, the preliminary rib forming means includes an insertion member facing the mold and entering the concave groove portion, and using the insertion member, the resin sheet is guided to the concave groove portion to form the preliminary rib. It is preferable to do.

  According to this configuration, the resin sheet can be easily adsorbed to the recessed groove portion.

  In addition, the preliminary rib forming means includes a base including the insertion member and an opposing surface that faces the suction surface, and the insertion member can protrude or be stored with respect to the opposing surface. The resin sheet is guided to the concave groove while the insertion member protrudes from the opposing surface, and the mold and the opposing surface are used to store the insertion member in the opposing surface. It is preferable to mold the resin sheet.

  When pressing the preliminary rib with the sliding means, there is a possibility that a built-up portion may be formed on the back surface of the base (the surface of the base opposite to the surface on which the rib is formed). It is possible to avoid the build-up portion from being formed on the back surface of the base portion by providing the base and the insertion member that protrudes or accommodates from the facing surface.

  The preliminary rib forming means includes an insertion member protruding from the adsorption surface of the mold, and forms the preliminary rib by adsorbing the resin sheet to the outer surface and the adsorption surface of the insertion member, It is preferable that the sliding means is disposed at a position facing the molding die and presses the preliminary rib from the width direction after the insertion member is retracted from the preliminary rib.

  According to this configuration, the spare rib can be easily formed by adsorbing the resin sheet to the outer surface of the protruding insertion member and the adsorption surface of the mold. In addition, since the auxiliary rib is pressed from both sides in the width direction after the insertion member is retracted, it is possible to avoid a gap that leads to the outside from the rib.

  The slide means is preferably provided with a temperature adjusting means. According to this configuration, the moldability can be improved by adjusting the temperature of the resin sheet.

  According to the vacuum forming apparatus according to the present invention, a resin product having a rib can be suitably integrally formed.

It is a schematic sectional drawing of the vacuum forming apparatus which concerns on 1st embodiment of this invention. It is a perspective view of the resin product which concerns on 1st embodiment. It is a manufacturing method of the resin product which concerns on 1st embodiment, Comprising: (a), (b) shows a preliminary | backup rib shaping | molding process, (c) shows a slide process. It is a schematic sectional drawing of the vacuum forming apparatus which concerns on 2nd embodiment of this invention. It is a manufacturing method of the resin product which concerns on 2nd embodiment, Comprising: (a), (b) shows a preliminary | backup rib formation process, (c) shows a slide process. It is a schematic sectional drawing of the vacuum forming apparatus which concerns on 3rd embodiment of this invention. It is a perspective view of the resin product which concerns on 3rd embodiment. It is a manufacturing method of the resin product which concerns on 3rd embodiment, Comprising: (a) shows a resin sheet arrangement | positioning process, (b), (c) shows a preliminary | backup rib shaping | molding process. It is a manufacturing method of the resin product which concerns on 3rd embodiment, Comprising: (a) shows a preliminary | backup rib shaping | molding process, (b) shows a slide process. It is a figure which shows the modification of a resin product, Comprising: (a) is a perspective view, (b) is II sectional drawing of (a). It is the schematic which shows the case where a resin product is manufactured using the conventional vacuum forming apparatus, Comprising: (a) shows before mold clamping and (b) shows after mold clamping.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the vacuum forming apparatus 1 according to the present embodiment is mainly composed of a forming die 2 and a plug 3. The vacuum forming apparatus 1 is an apparatus that integrally molds the resin product J shown in FIG.

  The resin product J is composed of a base portion J1 and a rib J2. The base J1 is a part that exhibits a plate shape. The rib J2 has a plate shape and is erected substantially perpendicular to the surface J1a of the base portion J1. The “width” of the rib in the claims means the plate thickness W of the rib J2. The resin product molded by the vacuum forming apparatus 1 is not limited to the resin product J, and may have other shapes as long as it has a base and a rib standing on the base.

  As shown in FIG. 1, the mold 2 mainly includes a frame 11, a mold body 12, suction means 13, slide means 14, and temperature adjustment means 15. The frame 11 is a member that constitutes the outline of the mold 2. The frame 11 includes a first frame 21 disposed horizontally, and a second frame 22 and a third frame 23 disposed perpendicular to the first frame 21 and spaced apart from each other.

  The mold main body 12 is a member constituting the main body portion of the mold 2 and is fixed to the frame 11. The mold body 12 includes a base portion 12a fixed to the second frame 22, and an extending portion 12b that extends horizontally from the base portion 12a. One end of the extended portion 12 b is continuous with the base portion 12 a, and the other end is fixed to the third frame 23.

  A plurality of suction holes P1, P2,... Are formed in the base portion 12a and the extending portion 12b, respectively. The suction holes P1, P2 are extended in the height direction. The suction hole P2 is disposed so as to communicate with a concave groove portion 41 described later.

  The suction means 13 depressurizes the suction chamber 26 surrounded by the frame 11 and the mold body 12. The suction means 13 is constituted by a vacuum pump in this embodiment.

  The slide means 14 is configured to be slidable with respect to the mold body 12 and presses a preliminary rib described later. The slide means 14 includes a slide piece 31, a slide shaft 32, and a drive means 33. The slide piece 31 has a substantially rectangular cross section. The sum of the height of the slide piece 31 and the height of the extending portion 12b is substantially equal to the height of the base portion 12a. Thereby, the opposing surface K1 which opposes the resin sheet S among the mold main bodies 12, and the opposing surface K3 which opposes the resin sheet S among the slide pieces 31 are located on the same plane.

  The slide shaft 32 is substantially perpendicular to the slide piece 31 on the side surface of the slide piece 31. The slide shaft 32 is connected to drive means 33 constituted by a cylinder or the like. The slide piece 31 is configured to be close to or away from the base portion 12a by driving the driving means 33.

  In the center of the mold 2, a concave groove 41 is formed that is recessed upward (on the frame 11 side). The concave groove portion 41 has a rectangular cross section. The recessed groove portion 41 includes an opposing surface K4 that faces the resin sheet S in the extended portion 12b, a side surface K5 of the base portion 12a, and a side surface K6 of the slide piece 31. An “adsorption surface” on which the resin sheet S is adsorbed is formed by the opposing surfaces K1, K3, K4 and the side surfaces K5, K6. Suction hole P1. One end side of P2 opens to the suction chamber 26, and the other end side opens to the opposing surfaces K1 and K4, respectively. In the present embodiment, chamfering is performed on the corner portions of the facing surface K1 and the side surface K5 and the corner portions of the facing surface K3 and the side surface K6. The width dimension of the concave groove portion 41 is such a dimension that the resin sheet S can be drawn into the concave groove portion 41 without being broken by evacuation from the suction hole P2 and wrap around the opposing surface K4, the side surfaces K5, K6. Yes, it is larger than the width of the rib J2 of the final shape.

  The temperature adjusting means 15 is disposed in the vicinity of the recessed groove portion 41 inside the base portion 12 a and the slide piece 31. The temperature adjusting means 15 includes a heater or the like, and can adjust the temperature around the concave groove portion 41 of the mold body 12.

  The plug 3 is disposed on the opposite side of the mold 2 with the resin sheet S interposed therebetween. The plug 3 includes a base 51 and an insertion member 52 erected on the base 51. The plug 3 is movable in a direction approaching or separating from the mold 2. The facing surface 51a facing the resin sheet S in the base 51 is flat. The insertion member 52 has a plate shape with a rectangular cross section. The insertion member 52 has a function of guiding the resin sheet S into the recessed groove portion 41 until the resin sheet S is evacuated by the suction hole P2. The width of the insertion member 52 is smaller than the width of the recessed groove portion 41. Further, the length of the insertion member 52 is smaller than the height (depth) of the recessed groove portion 41.

  In the present embodiment, the concave groove portion 41 of the mold 2, the plug 3, and the suction means 13 constitute “preliminary rib forming means” in the claims.

  Next, the manufacturing method of the resin product which concerns on 1st embodiment of this invention is demonstrated. Here, the case where the resin product J is manufactured using the vacuum forming apparatus 1 is illustrated. In the method for manufacturing a resin product according to the present embodiment, a sheet arranging process, a preliminary rib forming process, and a sliding process are performed.

  As shown in FIG. 1, in the sheet arranging step, a resin sheet S is arranged between the mold 2 and the plug 3. The resin sheet S uses a thermoplastic resin such as polyethylene or polypropylene. Moreover, since the resin sheet S is heated in advance at a predetermined temperature, it is ready for molding. Then, the temperature of the mold 2 is adjusted by the temperature adjusting means 15.

  As shown in FIGS. 3A and 3B, in the preliminary rib forming step, the resin sheet S is adsorbed on the adsorption surface of the mold 2 to form the preliminary base S1 and the preliminary rib S2. In the preliminary rib forming step, first, the suction means 13 is driven to generate a negative pressure around the suction surface of the mold 2. Then, the plug 3 is moved relative to the mold 2 side, and the resin sheet S is pushed into the concave groove portion 41 and guided. Thereby, the resin sheet S is adsorbed along the shape of the adsorption surface (opposing surfaces K1, K3, K4, side surfaces K5, K6) of the mold 2. In the present embodiment, the insertion member 52 is inserted to a depth that is about half of the groove 41.

  Then, as shown in FIG. 3B, the plug 3 is relatively moved in a direction away from the mold 2, and the insertion member 52 is positioned outside the groove 41. Thereby, the preliminary base S1 and the preliminary rib S2 are formed on the resin sheet S.

  The spare rib S2 is erected vertically to the spare base S1. The spare rib S2 includes side wall portions S2a and S2a and an upper wall portion S2b that connects the side wall portions S2a. A hollow portion S3 is formed inside the spare rib S2. The width of the spare rib S2 (the distance between the outer surfaces of the side wall portions S2a and S2a) is larger than the width of the desired rib J2 (see FIG. 2).

  As shown in FIGS. 3B and 3C, in the sliding step, the slide piece 31 is moved to press the spare rib S2. In the slide process, the suction of the resin sheet S is maintained following the preliminary rib forming process. In the sliding step, the slide piece 31 is moved to the base portion 12a side of the first mold body 24, and the side wall portions S2a and S2a are pressed in the width direction. As a result, the hollow portion S3 of the spare rib S2 is closed, and an integrated rib J2 is formed. At this time, the surplus at the time of forming the rib J2 bulges to the back surface side of the base portion J1, and the build-up portion J3 is formed.

  Alternatively, after pressing the preliminary rib S2 in the sliding step, the temperature of the molding die 2 may be lowered by the temperature adjusting means 15 to accelerate the curing of the resin.

  According to the vacuum forming apparatus 1 according to the present embodiment described above, after forming the preliminary rib S2 having a width larger than the desired rib J2, the preliminary rib S2 is pressed in the width direction by using the slide means 14. The rib J2 can be formed. Accordingly, even if the rib J2 having a small width and a large height is formed, the resin product J can be easily integrally formed.

  Further, since the width of the spare rib S2 is made larger than the desired rib J2, the width of the concave groove portion 41 is also set to be wide. Thereby, it can prevent that the resin sheet S is pulled by the corner | angular part of the ditch | groove part 41, and fractures | ruptures in the preliminary | backup rib shaping | molding process. Further, in the present embodiment, the chamfering process is applied to the corner portions of the facing surface K1 and the side surface K5 and the corner portions of the facing surface K3 and the side surface K6, so that the resin sheet S can be prevented from being broken.

  Further, in the present embodiment, since the resin sheet S is guided to the concave groove portion 41 using the insertion member 52 in the preliminary rib forming step, the resin sheet S can be easily adsorbed to the adsorption surface. Moreover, since the suction hole P <b> 2 is provided also in the concave groove portion 41, the resin sheet S can be reliably adsorbed also in the concave groove portion 41. Note that suction holes may be provided on the side surfaces K5 and K6.

  Moreover, since the temperature control means 15 is provided in this embodiment, hardening of the resin sheet S after shaping | molding can be accelerated | stimulated by cooling (reducing temperature). Thereby, a moldability can be improved.

[Second Embodiment]
Next, a vacuum forming apparatus according to the second embodiment of the present invention will be described. As shown in FIG. 4, the vacuum forming apparatus 1A according to the second embodiment is mainly composed of a forming die 2 and a plug 3A. Since the vacuum forming apparatus 1A is different from the first embodiment in the configuration of the plug 3A, the difference will be mainly described.

  The plug 3 </ b> A includes a base 51, an insertion member 52, and an elevating means 53. The plug 3 </ b> A is formed so as to be movable in a direction approaching or separating from the mold 2. The facing surface 51a facing the resin sheet S in the base 51 is flat. The insertion member 52 has a plate shape with a rectangular cross section. The width of the insertion member 52 is smaller than the width of the recessed groove portion 41. Further, the length of the insertion member 52 is smaller than the length of the concave groove portion 41.

  An insertion member passage 51 b through which the insertion member 52 is inserted is formed inside the base 51. The insertion member passage 51b is larger than the width and length of the insertion member 52, respectively. Further, an elevating means 53 for elevating the insertion member 52 inside the insertion member passage 51b is formed inside the base 51. For example, a cylinder can be used as the elevating / lowering means 53. The insertion member 52 is completely stored inside the facing surface 51a by being lowered, and protrudes from the facing surface 51a by being lifted.

  In this embodiment, the “preliminary rib forming means” in the claims is defined by the plug 3A and the suction means 13 provided with the insertion groove 52 that can be moved up and down with respect to the concave groove portion 41 of the mold 2 and the base 51. It is composed.

  Next, the manufacturing method of the resin product which concerns on 2nd embodiment of this invention is demonstrated. Here, the case where a resin product is manufactured using the vacuum forming apparatus 1A is illustrated. In the method for manufacturing a resin product according to the present embodiment, a sheet arranging process, a preliminary rib forming process, and a sliding process are performed. Since the sheet arrangement process is the same as that of the first embodiment, description thereof is omitted.

  As shown in FIGS. 5A and 5B, in the preliminary rib molding step, the resin sheet S is adsorbed on the adsorption surface of the mold 2 to form the preliminary base S1 and the preliminary rib S2. First, in the preliminary rib forming step, the suction means 13 is driven to generate a negative pressure around the suction surface of the mold 2 and the lifting / lowering means 53 of the plug 3A is driven to enter the insertion member 52 from the facing surface 51a. To protrude. Then, the plug 3 </ b> A is moved relatively to the mold 2 side, and the resin sheet S is pushed into the concave groove portion 41 and guided. Thereby, the resin sheet S is adsorbed along the shape of the adsorption surface (opposing surfaces K1, K3, K4, side surfaces K5, K6) of the mold 2.

  At this time, the insertion member 52 is inserted to a depth of about half of the groove 41, and the resin sheet S is held between the opposing surfaces K1, K3 and the opposing surface 51a of the plug 3A.

  Then, as shown in FIG. 5B, the elevating means 53 is driven to retract the insertion member 52 from the facing surface 51 a, and the insertion member 52 is completely stored inside the base 51.

  As shown in FIGS. 5B and 5C, in the sliding step, the slide piece 31 is moved to press the spare rib S2. In the sliding step, in a state where the resin sheet S is sandwiched between the facing surfaces K1 and K3 and the facing surface 51a of the plug 3A, the slide piece 31 is moved to the base portion 12a side of the first mold body 24, The side wall portions S2a and S2a are pressed in the width direction. As a result, the hollow portion S3 of the preliminary rib S2 is closed, and the rib J2 is formed.

  Alternatively, after pressing the preliminary rib S2 in the sliding step, the temperature of the molding die 2 may be lowered by the temperature adjusting means 15 to accelerate the curing of the resin.

  The vacuum forming apparatus 1A according to the present embodiment described above can achieve substantially the same effect as that of the first embodiment. Moreover, in the sliding process of this embodiment, since it shape | molds in the state which pinched | interposed the resin sheet S between the opposing surfaces K1 and K3 and the opposing surface 51a of the plug 3A, a built-up part (on the back surface J1b of the base part J1) It is possible to prevent the formation of the built-up portion J3 in FIG. Thereby, the back surface J1b can be flattened.

  Although the first embodiment and the second embodiment of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the first embodiment and the second embodiment, the mold 2 is disposed on the upper side and the plug 3 is disposed on the lower side. However, the mold 2 may be disposed on the lower side and the plug 3 may be disposed on the upper side.

  Further, for example, the width of the groove 41 may be set as appropriate according to the desired rib width of the resin product to be molded, the viscosity of the resin sheet S, and the like. Further, the width and length of the insertion member 52 may be appropriately set according to the width of the concave groove portion 41, the viscosity of the resin sheet S, and the like.

  Moreover, although the case where the insertion member 52 was used in this embodiment was illustrated, the insertion member 52 is abbreviate | omitted according to the width | variety and depth of the concave groove part 41, and a preliminary | backup rib with the suction means 13 and the concave groove part 41 is shown. You may comprise a shaping | molding means. Moreover, although the opposing surface 51a of the base 51 is made to contact a part of back surface J1b of the base part J1, you may make it contact the whole back surface J1b of the base part J1.

[Third embodiment]
Next, a vacuum forming apparatus according to the third embodiment of the present invention will be described. As shown in FIG. 6, the vacuum forming apparatus 1 </ b> B according to the third embodiment is mainly configured by a forming die 62, a moving die 63, and a slide means 64. The vacuum forming apparatus 1B is an apparatus for forming a resin product L as shown in FIG. The resin product L is configured to include a base L1 and a rib L2 that stands vertically to the base L1.

  As shown in FIG. 6, the molding die 62 is a die that has a substantially rectangular parallelepiped shape, and is formed with an insertion member passage 71 that communicates in the height direction. One end side of the suction holes P4 and P5 is opened in the facing surface K7 facing the resin sheet S in the mold 62. The other ends of the suction holes P4 and P5 are connected to a suction means (not shown). By driving the suction means, a negative pressure is generated in the vicinity of the opposing surface K7 of the mold 61, and the resin sheet S is adsorbed on the opposing surface (adsorption surface) K7.

  The movable die 63 includes a movable body 72 and an insertion member 73. The moving body 72 can be moved up and down relatively with respect to the mold 62. The insertion member 73 is inserted through the insertion member passage 71, one end side is a free end, and the other end side is fixed to the moving body 72. When the movable body 72 moves up with respect to the mold 62 (state shown in FIG. 6), the insertion member 73 protrudes from the facing surface K7. On the other hand, when the moving body descends with respect to the mold 62, the insertion member 73 is accommodated inside the facing surface K7.

  The slide means 64 is located on the opposite side of the mold 62 with the resin sheet S interposed therebetween. The sliding means 64 is mainly composed of a first pressing part 81, a second pressing part 82, and a temperature adjusting means 83.

  The first pressing portion 81 has a rectangular parallelepiped shape, and includes a facing surface K8 that faces the resin sheet S and a side surface K9 that faces the second pressing portion 82.

  The second pressing portion 82 has a rectangular parallelepiped shape, and includes a facing surface K10 that faces the resin sheet S and a side surface K11 that faces the first pressing portion 81. Inside the second pressing portion 82, temperature adjusting means 83 is formed. The temperature adjusting means 83 includes a heater and the like, and the temperature of the opposing surface K10 and the side surface K11 of the second pressing portion 82 can be adjusted.

  The slide means 64 includes a drive means such as a motor, and is movable in a direction close to or away from the mold 62. Further, the second pressing portion 82 is movable in a direction approaching or separating from the first pressing portion 81.

  In the present embodiment, the forming die 62, the moving die 63, and the suction means constitute the “preliminary rib forming means” recited in the claims.

  Next, the manufacturing method of the resin product which concerns on 3rd embodiment of this invention is demonstrated. Here, the case where the resin product L is manufactured using the vacuum forming apparatus 1B is illustrated. In the method for manufacturing a resin product according to the present embodiment, a sheet arranging process, a preliminary rib forming process, and a sliding process are performed.

  First, as shown in FIG. 8A, the slide means 64 is positioned at a position separated from the mold 62. Further, the movable die 63 is raised so that the insertion member 73 protrudes from the facing surface K 7 of the molding die 62. Further, the temperature of the facing surface K10 and the side surface K11 is raised by the temperature adjusting means 83. In the sheet arranging step, the resin sheet S is arranged on the protruding insertion member 73.

  As shown in FIGS. 8A and 8B, in the preliminary rib forming step, the preliminary rib S2 having a width larger than the desired rib is formed. First, in the preliminary rib forming step, a suction means that does not resin is operated to generate a negative pressure in the vicinity of the facing surface K 7, and the resin sheet S is adsorbed on the facing surface K 7 and the outer surface of the insertion member 73. Thereby, the preliminary | backup base part S1 and the preliminary | backup rib S2 provided with side wall part S2a, S2a are formed.

  As shown in FIG. 8C, the slide means 64 is moved in the direction of the mold 62, and the resin sheet S is sandwiched between the facing surface K7 of the mold 62 and the facing surfaces K8, K10 of the slide means 64. Then, as shown in FIG. 9A, the movable body 72 is lowered with respect to the mold 62, and the insertion member 73 is completely retracted from the spare rib S2. As a result, a hollow portion S3 is formed in the spare rib S2.

  As shown in FIG. 9B, in the sliding step, the second pressing portion 82 is relatively moved in the direction approaching the first pressing portion 81 to close the hollow portion S3 of the spare rib S2, and the side wall portion S2a. , S2a are integrated. Thereby, the resin product L is formed.

  Alternatively, after pressing the preliminary rib S2 in the sliding step, the temperature of the molding die 2 may be lowered by the temperature adjusting means 15 to accelerate the curing of the resin.

  According to the vacuum forming apparatus 1B according to the third embodiment described above, after the preliminary rib S2 having a width larger than the desired rib L2 is formed, the preliminary rib S2 is pressed in the width direction using the slide means 64. Thus, the rib L2 can be formed. Thereby, even if it is a case where the rib L2 with a small width and a large height is formed, the resin product L can be easily integrally formed.

  Further, the preliminary rib S2 can be easily formed by adsorbing the resin sheet S to the outer surface of the insertion member 73 and the opposing surface K7. Further, since the resin sheet S is not forcibly pulled during the preliminary rib forming step, the resin sheet S can be prevented from being broken.

  In addition, since the temperature adjusting means 83 is provided in the present embodiment, the resin sheet S before being molded can be prevented from being cured by heating, and the resin sheet after being molded by cooling (reducing the temperature). Curing of S can be promoted. Thereby, a moldability can be improved. Moreover, according to 3rd embodiment, the vacuum forming apparatus 1B can be simplified comparatively.

  In the resin product manufacturing method according to the third embodiment, in the resin sheet arranging step, the resin sheet S is arranged after the insertion member 73 protrudes from the facing surface K7, but the insertion member 73 is retracted. After the resin sheet S is disposed on the facing surface K7, the insertion member 73 may be raised.

[Modification]
FIG. 10 is a view showing a modification of the resin product, in which (a) is a perspective view and (b) is a cross-sectional view taken along the line II of (a). The resin product M according to the modified example includes a base M1 and ribs M2 that stand vertically to the base M1. At both ends in the length direction of the rib M2, gaps M3 and M3 extending in the height direction are formed. The gap M3 is hollow. In the slide process of the above-described embodiment, the ribs are formed by pressing the entire preliminary ribs. However, in the modification, the outer peripheral edge of the preliminary ribs is not pressed, and the portions other than the outer peripheral edge are pressed. Thereby, the rib M2 provided with the space | gap part M3, M3 can be formed.

  By forming the gaps M3 and M3 at both ends in the length direction of the rib M2, the strength and rigidity of the rib M2 can be increased. Further, a portion of the spare rib that is not pressed in the sliding step may be further provided, and for example, a plurality of gaps may be formed in the height direction of the rib M2 to increase the strength and rigidity. In the modification, the gap M3 is provided, but it may be solid rather than hollow. That is, you may make it provide a thick part in a part of rib M2.

  Although the embodiments and modifications of the present invention have been described above, design changes can be made as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Vacuum forming apparatus 2 Mold 3 Plug 11 Frame 12 Mold main body 13 Suction means 14 Slide means 31 Slide piece 32 Slide shaft 41 Concave groove part 51 Base 51a Opposing surface 52 Insertion member 73 Insertion member J Resin product J1 Base J2 Rib J3 Overlaying part S Resin sheet S1 Preliminary base S2 Preliminary rib S3 Hollow part P1 Suction hole P2 Suction hole

Claims (6)

A resin product including a base and a rib standing on the base can be integrally formed, and is a vacuum forming apparatus including a mold,
By preliminarily forming a preliminary rib having a width larger than the width of the desired rib while standing on the preliminary base by sucking a moldable resin sheet to the suction surface of the mold,
A vacuum forming apparatus comprising: a slide means configured to be movable in a width direction of the preliminary rib and to form the rib having a desired width by pressing the preliminary rib from the width direction. The preliminary rib forming means includes a recessed groove formed in a part of the adsorption surface larger than a desired rib width,
2. The vacuum forming apparatus according to claim 1, wherein the preliminary rib is formed by sucking the resin sheet to the groove surface and the suction surface of the concave groove portion. The preliminary rib forming means includes an insertion member that faces the forming die and enters the concave groove portion,
The vacuum forming apparatus according to claim 2, wherein the preliminary rib is formed by guiding the resin sheet to the concave groove portion using the insertion member. The preliminary rib forming means includes a base that includes the insertion member and an opposing surface that faces the suction surface, and the insertion member can be protruded or stored with respect to the opposing surface. ,
Guiding the resin sheet to the concave groove while causing the insertion member to protrude from the facing surface;
The vacuum forming apparatus according to claim 3, wherein the resin sheet is sandwiched between the mold and the facing surface while the insertion member is housed in the facing surface. The preliminary rib forming means includes an insertion member protruding from the adsorption surface of the mold, and forms the preliminary rib by adsorbing the resin sheet to an outer surface of the insertion member and the adsorption surface,
The said slide means is arrange | positioned in the position facing the said shaping | molding die, The said rib is pressed from the width direction, after retracting the said insertion member from the said spare rib, The Claim 1 characterized by the above-mentioned. Vacuum forming equipment.   The vacuum forming apparatus according to any one of claims 1 to 5, wherein the slide means is provided with temperature adjusting means.

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