JP2011115980A - Mold, molding with skin, and method for producing molding with skin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold which does not need another member and can prevent the adhesion between a skin material on the outside of a cavity surface and a molding material, molding with a skin, and a method for producing the molding with the skin. <P>SOLUTION: The mold for molding the molding with the skin which has the skin material on the surface has a pinch-off part which forms a biting-off line by pushing the molding material of the molding and a separation part having a space for preventing the adhesion between the skin material and the molding material on the outside of the pinch-off part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a molded article with a skin having a skin material on the surface, a mold used for the production thereof, and a method for producing the molded article with a skin.

  The hollow molded article is manufactured by a method called blow molding. In blow molding, a molding material such as a resin is extruded between split molds, and then the molding material is sandwiched in a cavity of the split mold. Then, the split mold is clamped and blown from the inside of the molding material to expand the molding material and bring it into contact with the cavity surface. By contacting the cavity surface, the molding material is molded into the shape of the cavity and becomes a hollow body molded product. A so-called burr is formed in an excess portion of the extruded molding material protruding from the cavity. A part of the molding material is crushed by a pinch-off part provided on the outer periphery of the cavity so that the burr can be easily cut off, thereby forming a thin part in the molding material. And this burr | flash is cut off, for example after pulling out a hollow body molded product from a metal mold | die, or by cutting with a knife etc. by manual work.

  However, it is not preferable to manually remove burrs after taking them out of the mold because the number of man-hours increases. Therefore, for example, in Patent Document 1, a burr protrusion recess is provided so as to sandwich a burr on the outside of the pinch-off part, and the burr is removed from the pinch-off part by sliding the burr protrusion recess while the burr is sandwiched. Is disclosed.

  Further, Patent Document 2 discloses a technique in which a slide plate having an edge is provided outside the cavity surface, and the burr is cut from the pinch-off portion by hooking the burr with the edge and sliding the slide plate.

  As described above, when the burrs are torn off, there is a problem that a small amount of burrs remain in the molded product and it cannot be cut out cleanly, and the appearance near the pinch-off portion of the molded product is not good.

  By the way, for a molded product with a skin having a skin material on the surface of the hollow body, a skin material is set in advance on one or both sides of the divided mold, and after the molding material such as resin is extruded, the mold is clamped and blown, etc. The molding material is molded so as to be in contact with the cavity surface, so that the skin material and the molding material which are arranged in advance in the mold are bonded to each other.

  In the case of a molded product with a skin formed in this way, in order to solve the above problems, for example, as described in Patent Document 3, an insertion mold is used in addition to a pair of split molds. By providing a step with the same thickness as the skin material near the pinch-off part, and covering the pinch-off part with the skin material while storing it in the step, the burr is covered with the skin material without impairing the appearance. A method has been proposed. By doing in this way, the pinch-off part which is not good-looking can be hidden from the human eye, and further, the step between the skin material and the hollow body can be eliminated, and the appearance can be kept good.

  In Patent Document 4, a cutter frame having a knife edge formed along the cavity surface is provided between the skin material and the parison to prevent adhesion between the parison and the skin material outside the cavity surface. A technique for cutting a parison clamped with a knife edge is disclosed. With this technique, only the parison can be cut along the cavity surface at the same time as the molding, and the skin material can be taken larger than the parison cut portion, so that the parison cut portion can be covered with the skin material. In addition, since it is possible to prevent the molding material and the skin material from adhering outside the cavity surface, it is possible to reuse the burr that is the excess molding material that has been cut off.

JP-A-6-55620 US Pat. No. 6,685,873 JP-A-8-118459 JP 62-142625 A

  However, the technique described in Patent Document 4 has a problem that a cutter frame is required in addition to the divided mold, or the cutter frame has to be set after setting the skin material, and there are many molding processes.

  Therefore, the present invention has been made in view of the above problems, and does not require a separate member, and can prevent adhesion between the skin material outside the cavity surface and the molding material, a molded product with a skin, It aims at providing the manufacturing method of a molded article with a skin.

  In order to solve the above-mentioned problems, a mold according to the present invention is a mold for molding a molded article with a skin having a skin material on the surface, and a pinch-off portion that forms a cutting line by pressing the molding material of the molded article. The separation part which has the space which prevents adhesion of the skin material and the molding material is provided on the outside of the pinch-off part.

  Moreover, the metal mold | die in this invention may be made to equip the location where the said pinch-off part forms the corner | angular part of the said molded article.

Further, in the mold according to the present invention, the separation portion has a space for storing the skin material,
And a space for storing the molding material.

  Moreover, the metal mold | die in this invention may make it the said isolation | separation part have a space more than the total thickness of the thickness of the said skin material, and the thickness of the said molding material at least.

  Moreover, the metal mold | die in this invention WHEREIN: You may make it the said isolation | separation part have a holding means which maintains the position of the said skin material by hooking the said skin material.

  Moreover, the metal mold | die in this invention may make it the said isolation | separation part have an air blowing means which blows gas in the said space.

  Further, the mold in the present invention may have a deburring means for cutting only the molding material separated from the skin material outside the cutting line.

  The molded article with a skin according to the present invention is characterized in that a part of the skin material molded using the mold according to the present invention is not bonded to the molding material, and is bonded to the molding material.

  Further, in the method for producing a molded article with a skin according to the present invention, the step of arranging the skin material on one of the molds according to the present invention, and the method of forming the space by spraying a gas onto the molten molding material And a step of attaching the molding material to the depression of the mold.

  In addition, the method for manufacturing a molded article with a skin according to the present invention may further include a step of cutting only the molding material outside the cutting line by the deburring means at the pinch-off portion after fitting the mold. good.

  According to the present invention, it is possible to prevent adhesion between the skin material outside the cavity surface and the molding material without requiring a separate member.

It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the molded article with a skin which concerns on embodiment of this invention. It is a figure which shows the cross section of the molded article with a skin which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the molded article with a skin which concerns on embodiment of this invention. It is a figure which shows the cross section of the molded article with a skin which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the molded article with a skin which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention. It is a figure which shows the cross section of the metal mold | die which concerns on embodiment of this invention.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  By manufacturing a molded product with a skin using the mold according to the present invention, it is possible to prevent the skin material and the molding material arranged outside the cavity surface from adhering, and only the molding material can be easily pinched off. Therefore, it is possible to reuse the burrs that are excess molding material. Furthermore, since the skin material can be left longer than the pinch-off part, it becomes possible to wrap the molded product so as to cover the pinch-off part of the molded product with the skin material, and to obtain a molded product with a skin having excellent design properties. it can.

(First embodiment)
FIG. 1 is a view showing a cross section of a mold according to an embodiment of the present invention. As shown in FIG. 1, the mold 1 includes a first mold 2 and a second mold 3. In the mold 1, the cavity 4 is formed by combining the first mold 2 and the second mold 3. A molding material such as resin is sandwiched between the cavities 4, and the molding material is molded into the shape of the cavities 4 to form a molded product. That is, the shape of the cavity 4 is determined by the shape of the molded product to be manufactured, and the shape of the cavity 4 of the mold according to this embodiment is not limited to the shape shown in FIG. obtain. In addition, here, the two molds 2 and 3 are described as the split molds, but the present invention is not limited to this, and when it is desired to obtain a molded product having a complicated shape, etc. For example, you may comprise with three or more metal mold | dies.

  Excess molding material that protrudes from the cavity 4 when the molding material is sandwiched between the cavities 4 forms so-called burrs 5. Therefore, the mold 1 is pinched off to form a cut line by crushing between the molding material molding part and the excess part so that the burr 5 can be easily cut from the molded product 6 molded in the cavity 4. The part 7 is provided on the outer periphery of the cavity 4. Further, when the first mold 2 and the second mold 3 are combined, a space 8 that is closed at least by the pinch-off section 7 is formed outside the pinch-off section 7 of the mold 1. It is like that.

  As shown in FIG. 1, in the mold according to the embodiment of the present invention, the presence of this space 8 allows adhesion between the end portion 9 of the skin material protruding from the cavity 4 and the protruding molding material, ie, the burr 5. Can be prevented. For this reason, it becomes easy to cut out only the burr 5 from the molded product 6. Further, since the skin material can be largely left in the molded product from the pinch-off portion 7, the pinch-off portion 7 can be covered and a molded product excellent in design can be obtained.

  As shown in FIG. 1, the space 8 has at least a total thickness of the thickness of the skin material and the thickness of the molding material. In addition, it is preferable in order to prevent adhesion | attachment that it is sufficiently wider than the total thickness of both materials. By doing in this way, adhesion with the edge part 9 and the burr | flash 5 of a skin material can be prevented reliably. In FIG. 1, the space 8 is formed by providing depressions in both the first mold 2 and the second mold 3, but the first mold 2 and the second mold 3 Only one of them may have a recess to form the space 8. In this case, it is preferable to provide a depression in the mold on the side where the skin material is not disposed. As a result, the skin material can be put on the mold on one side and the burr 5 can be put on the recess easily.

  Next, a method for manufacturing a molded article with a skin according to an embodiment of the present invention will be described with reference to FIGS. First, as shown in FIG. 2, the skin material 11 is arranged on the cavity surface 10 side of the first mold 2. At this time, as shown in FIG. 2, the skin material 11 is arranged so that the end portion 9 protrudes from the pinch-off portion 7. Then, a parison 12 such as a resin in a molten state is extruded between the first mold 2 and the second mold 3. At this time, the parison 12 may be extruded as a parison having a plurality of layers, for example, or may be in the form of at least two sheets. After extruding the parison 12 as much as necessary to obtain the desired molded product, the first mold 2 and the second mold 3 are fitted together and clamped, so that the skin material 11 and the parison 12 is sandwiched between the first mold 2 and the second mold 3. In this state, by blowing a gas such as air near the center of the parison, the parison expands along the cavity surface to form a hollow body in the shape of the cavity 4, and the contact portion between the skin material 11 and the parison is pressure-bonded. Then, the skin material 11 and the parison are bonded to each other, and the molded product 6 with the skin having the skin material on a part of the surface is molded. After cooling, the mold 1 is opened and the molded product 6 is taken out. The obtained molded product 6 has a very thin portion corresponding to the pinch-off portion 7, and the burr 5 can be easily removed by tearing or cutting with a knife. The step of removing the burrs may be performed when the mold 1 is fitted, or may be performed after the molded product 6 is taken out from the mold 1. When the burrs are cut in a state in which the mold 1 is fitted, the molded product 6 is removed from the mold 1 by providing the mold 1 with means for cutting the burrs as will be described in detail below. It is no longer necessary to perform deburring manually after that, and the number of manual labor can be reduced. Further, when removing the burrs when the mold 1 is fitted, the process of cutting the burrs may be performed at any time as long as the mold 1 is fitted. For example, the process of inflating the parison It may be performed before or after the molded product is molded from the parison. After removing the burrs from the molded product, the end 9 of the skin material is folded to the exposed side of the molding material, and bonded to cover the burrs slightly left on the pinch-off portion of the molded product, thereby improving design. An excellent molded product can be obtained.

  In the mold 1 according to the embodiment of the present invention, as shown in FIG. 1, when the first mold 2 and the second mold 3 are engaged, a space 8 is formed outside the pinch-off portion 7. It has come to be. In the method for manufacturing a molded article with a skin according to the embodiment of the present invention, the skin material 11 is arranged in the first mold 2 so that the end 9 protrudes outward from the cavity 4 as shown in FIG. To do. At this time, it is preferable that the length of the end portion 9 is a length that can sufficiently hide the portion where the burr is cut from the molded product. In addition, the end 9 is bent so that the length of the end 9 can be kept straight by its own tension, or the end 9 is kept straight by using a splint or the like. It is possible to suppress sticking to 5. Further, the burr 5 that is an extra molding material extruded from the cavity 4 is stuck to the recess 12 provided in the second mold 3 that forms the space 8, so that the end of the skin material can be secured more reliably. Adhesion between the portion 9 and the burr 5 can be suppressed. If the end portion 9 has sufficient tension, the burr 5 sticks to the recess 13 and the end portion 9 of the skin material separates from the burr 5 by its own tension before it hardens. Therefore, when the burr 5 sticks to the recess 13, the end portion 9 of the skin material and the burr 5 are separated, and adhesion between the end portion 9 of the skin material and the burr 5 can be prevented.

(Second Embodiment)
Various methods of attaching the burr 5 to the recess 13 can be considered. For example, as shown in FIG. 3, when the bonding surface of the mold 1, that is, the surface where the first mold 2 and the second mold 3 are combined is in the horizontal direction, the burr 5 extends from the pinch-off portion 7 in the horizontal direction. Stick out. In such a case, the burr 5 can stick to the recess 13 by its own weight, and the adhesion between the skin material and the burr can be effectively suppressed. In the mold shown in FIG. 4, the bonding surface is in the vertical direction, but the space 8 extends from the pinch-off portion 7 in the horizontal direction. Therefore, by using such a mold, the burr 5 can be stuck to the recess 13 by its own weight, and the adhesion between the skin material and the burr can be effectively suppressed.

(Third embodiment)
Further, for example, an air blowing means for blowing a gas such as air into the space 8 may be provided so that the gas is blown to the burr 5 so that the burr 5 sticks to the recess 13. By doing so, unlike the mold shown in FIG. 1, unlike FIG. 3, the joining surface is in the vertical direction, the space 8 is provided in the vertical direction, and the burr 5 does not come under the skin material. In addition, the burr 5 can be stuck to the recess 13. At this time, it is preferable to blow in warm air so that the burr 5 does not quickly cool and harden. In addition, it is necessary to arrange | position the edge part 9 so that gas may not reach the edge part 9 at this time. Further, for example, gas may be sucked from the burr 5 side so that the burr 5 is stuck to the recess 13 together with the gas. As shown in FIG. 5, the mold 1 may include air blowing means 14.

  The step of blowing the gas into the space 8 is preferably performed during extrusion of the parison, or after extruding the parison and before fitting the mold. Before fitting the mold, the parison and skin material are not yet in contact. For this reason, it is easy to attach only the parison to the depression 13 of the mold. Further, before the mold is fitted, the parison is in a molten state and easily deforms, so that it is easy to stick to the recess 13. Moreover, you may perform the process of blowing gas in the space 8 before taking out a molded article after fitting a metal mold | die. By doing in this way, adhesion with a skin material and a burr | flash can be suppressed more reliably. At that time, it is preferable to adjust the temperature of the portion of the recess 13 of the mold 1 different from the other portions. For example, in the step of blowing gas into the space 8, it is preferable to keep the temperature of the recess 13 at a temperature at which burrs are easily deformed. By doing in this way, a burr | flash becomes easy to stick to the hollow 13, and adhesion | attachment of a skin material and a burr | flash can be suppressed more reliably.

(Fourth embodiment)
Further, the space 8 is not limited to one large space. For example, as shown in FIG. 6, the space 8 may be divided into a space 8A in which only the end portion 9 of the skin material is accommodated and a space 8B in which only the burr is accommodated. By doing in this way, it becomes possible to prevent adhesion between the end portion 9 of the skin material and the burr 5 more reliably. Each of the spaces 8A and 8B only needs to have a width and a space in which the skin material and the burr are sufficiently accommodated. The space 8A in which the end portion 9 of the skin material is accommodated preferably has a width substantially the same as the thickness of the end portion 9 of the skin material. Further, it is preferable to provide a valve for preventing the molding material from entering in the vicinity of the entrance of the space 8A in which the end portion 9 of the skin material is accommodated so that the molding material does not enter. For example, the prevention valve is bent at the upper part and can accommodate the skin material, but it is preferable that the prevention valve has a strength that prevents the molding material from entering.

(Fifth embodiment)
For example, as shown in FIG. 7, a holding means such as a hook 15 that maintains the position of the end portion 9 of the skin material may be attached to the mold 1. By doing in this way, when the burr 5 sticks to the dent 13 due to its own weight or the gas blown by the air blowing means, the end portion 9 of the skin material is bent together with the burrs 5 toward the dent 13 side. , It can be prevented from adhering to the burr 5. Therefore, by attaching holding means such as the hook 15 to the first mold 1, the end portion 9 of the skin material and the burr 5 are more reliably separated.

(Sixth embodiment)
Further, for example, the skin material and the mold may be attached via an adhesive or the like. The adhesive only needs to be strong enough that the skin material does not peel from the mold due to the influence of the burr 5, and is preferably peeled off easily after molding. At this time, an adhesive may be attached in the vicinity of the outermost end of the end portion 9, and then the portion may be cut off.

  Thus, by providing the space 8 and sticking the burr 5 to the recess 13 provided in the second mold 3 that forms the space 8, the end portion 9 of the skin material and the burr 5 are separated. Can be made. Then, by pulling the burr 5 separated from the skin material or cutting it off with a knife or the like, only the burr 5 can be separated from the molded product 6 with the skin. Since the skin material is not adhered to the burr thus separated, it can be reused by crushing. Furthermore, since the skin material can be left longer than the pinch-off part, it becomes possible to wrap the molded product so as to cover the pinch-off part of the molded product with the skin material, and to obtain a molded product with a skin having excellent design properties. it can.

  8 and 9 are views showing a cross section of a molded product with a skin according to an embodiment of the present invention. FIG. 8 is a view showing the molded product 6 after the burr 5 is cut off. As shown in FIG. 8, in the molded product 6, only the burr 5 is cut off, and the end portion 9 of the skin material remains without being cut off. As shown in FIG. 9, the end portion 9 of the skin material is folded back to the back side, so that the portion where the burr 5 is cut out is covered with the skin material and cannot be seen. For example, if the burr 5 is cut off, a slight burr remains when the burr is torn off. By doing so, the remaining burr can be covered, and the design is excellent. It becomes possible to produce a molded product with a skin. Further, by folding the end portion 9 of the skin material to the back side in this way, the end portion 9 of the skin material is also invisible from the front. The end portion 9 of the skin material may be frayed or the like, and if the end portion 9 of the skin material is visible from the surface, the design of the molded product may be deteriorated. Therefore, by folding back the end portion 9 of the skin material to the back side and making the end portion 9 of the skin material invisible from the surface, it is possible to manufacture a molded product with a skin having excellent design.

(Seventh embodiment)
FIG. 10 is a view showing a cross section of a mold according to the embodiment of the present invention. The mold shown in FIG. 1 has a parting line formed substantially at the center of the molded product, and the cavity surface of the mold 3 includes a side surface portion of the molded product and a back surface portion 16 on which no skin material is disposed. It is comprised by the shape to form, and the part which forms the pinch-off part 7 is convex shape. On the other hand, in the mold shown in FIG. 10, a parting line is formed at the corner of the molded product, and the cavity surface of the mold 3 has a shape that forms only the back surface 16 of the molded product on which the skin material is not disposed. It does not have a shape that forms the side surface. That is, in the mold 3, the pinch-off part 7 and the cavity surface form a plane in the vicinity of the pinch-off part. By using the mold shown in FIG. 10, it becomes possible to manufacture a molded article with a skin material having excellent design properties.

  For example, even if the end portion 9 of the skin material is folded back to cover the part from which the burrs have been cut off, small burrs may remain in the molded product 6 and the molded product may protrude. That is, even when the mold shown in FIG. 1 is used, even if a small burr 17 remains on the side surface of the molded product 6 and the molded product 6 is covered with the remaining end portion 9 of the skin material, as shown in FIG. In some cases, a protrusion 18 due to a small burr 17 may occur. However, when the mold shown in FIG. 10 is used, the small burrs 17 are formed at the corners of the molded product, and even if the small burrs 17 remain, the small burrs 17 are continuous with the surface on the back side of the molded product 6. It happens as you do. Therefore, as shown in FIG. 12, when the molded product 6 is covered with the remaining end portion 9 of the skin material, a small burr 17 wraps around the back side of the molded product. In this way, by using the mold shown in FIG. 10, even if the protrusion 18 due to the small burr 17 is generated, it will be generated on the back surface of the molded product 6, and molding with a skin material having excellent design properties The product can be manufactured. In order to obtain such an effect, it is only necessary to provide parting lines at the corners that form the side surface and the back surface of the molded product, and the other parts are recessed according to the shape of the desired molded product. You may be there and it may be exciting. Further, when the mold shown in FIG. 10 is used, since the skin material is adhered not only to the surface of the molded product but also to the entire side surface, the portion of the skin material to be folded back may be short. For this reason, the length of the end portion of the skin material that protrudes outside the pinch-off portion 7 may be short, and the end portion of the skin material is easily kept straight by its own tension. Also, when the position of the end portion of the skin material is maintained by a holding means such as a hook, if the length of the end portion of the skin material is short, the position of the end portion of the skin material is easily maintained.

(Eighth embodiment)
In the pinch-off portion, the skin material and the molding material are thinly bonded, and a protrusion tends to occur when the skin material is wound around a molded product. Further, when a small burr can be formed as described above, a large protrusion is formed on the molded product after the skin material is wound. In such a case, it is preferable to use the mold shown in FIG. That is, the mold 3 shown in FIG. 13 has a convex portion in the vicinity of the pinch-off portion 7 so that the molded product has a concave portion. As shown in FIG. 14, a recess 19 is formed in the molded product 6 molded by the mold according to the present embodiment. For this reason, when the molded product 6 is covered with the surplus end portion 9 of the skin material, the small burrs 17 are accommodated in the recesses 19, so that protrusions due to the small burrs 17 can be avoided, and the skin material with excellent design is attached. It becomes possible to manufacture a molded article. In addition, when the parting line is formed at substantially the center of the molded product as shown in FIG. 1, for example, a concave portion may be formed in the molded product so that burrs can be accommodated by using a slide mold.

(Ninth embodiment)
FIG. 15 is a view showing a cross section of a mold according to the embodiment of the present invention. Unlike the mold shown in FIG. 1, the mold shown in FIG. 15 includes a slide plate 20 as means for cutting burrs outside the space 8. For example, as shown in FIG. 15, the slide plate 20 has a shape to hook the burr 5. When using the mold shown in FIG. 15 to manufacture a molded product with a skin material, the skin material is arranged so that the end portion 9 of the skin material is within the space 8 as shown in FIG. The parison is pushed out so that 5 is placed on the slide plate 20. By doing so, for example, when the slide plate 20 is moved in the direction of arrow A in FIG. 15, only the burr 5 is pulled by the slide plate 20 and only the burr 5 is cut off from the molded product 6. Become. Here, the slide plate 20 should just be the shape which hooks the burr | flash 5, and is not restricted to the shape shown in FIG.

  Further, as shown in FIG. 15, the slide plate 20 may be provided on the second mold 3 side, the first mold 2 side, or the first and second molds. Both molds may be provided. When the first mold 2 includes the slide plate 20, the slide plate 20 can cut the burr 5 while pressing the burr 5 against the second mold 3. That is, since the burr 5 is pressed in a direction away from the end portion 9 of the skin material, it is possible to further suppress adhesion between the end portion 9 of the skin material and the burr 5. When both the first and second molds are provided with the slide plate 20, the burr 5 can be more reliably hooked and the burr 5 can be cut more reliably.

  The slide plate 20 may be moved as long as the burr 5 is pulled. For example, as shown in FIG. 16, the slide plate 20 is divided into four parts, and the directions of the arrows shown in FIG. The slide plate 20 may be moved away from the pinch-off portion 7. Thus, by pulling the burr 5 in the same direction at all positions, the state of the cut-out portion of the burr 5 becomes uniform. Also, as shown in FIG. 17, the slide plate 20 may be divided into two parts and moved in the direction of the arrow shown in FIG. By doing so, it is possible to reduce the number of devices that drive the slide plate 20. As shown in FIG. 18, it may be one that rotates in the direction of the arrow around the axis. By pulling and cutting the burr by rotational movement in this way, the burr can be cut more cleanly than simply pulling in parallel. The slide plate 20 may be moved in the direction in which the burr 5 is pulled, and is limited to those divided into four as shown in FIGS. 16 and 18 and those divided into two as shown in FIG. It is not a thing. 16-18 is a figure which shows the cross section of a metal mold | die when a metal mold | die is cut by a surface horizontal to a joining surface.

  In the mold 1 shown in FIG. 15, the space 8 is a closed space. Therefore, as shown in FIG. 15, the mold 1 may be provided with an air blowing port 21 in order to blow gas into the space 8 by the air blowing means. By blowing gas through the air blowing port 21 and blowing gas to the burr 5, even when the mold 1 shown in FIG. 15 is used, the burr 5 sticks to the recess 13, and the end 9 of the skin material Bonding with the burr 5 can be suppressed.

  When the burr 5 is cut from the molded product 6, as described above, the burr 5 and the end portion 9 of the skin material are separated from each other, so that the end portion 9 of the skin material is pulled by moving the slide plate 20. No burr 5 is pulled. For this reason, it is possible to cut only the burr 5 from the molded product 6 without cutting the end portion 9 of the skin material from the molded product 6. Therefore, the skin material 11 is not bonded to the cut burr 5. For this reason, this burr | flash 5 can be reused by grind | pulverizing. Further, the end portion 9 of the remaining skin material can be folded back to the back side of the molded product 6, and a molded product with a skin having excellent design can be manufactured. In addition, it is not necessary to perform deburring manually after taking out the molded product from the mold, and the number of man-hours can be reduced.

  The present invention has been described above by the preferred embodiments of the present invention. While the invention has been described with reference to specific embodiments thereof, various modifications and changes can be made to these embodiments without departing from the broader spirit and scope of the invention as defined in the claims. is there.

DESCRIPTION OF SYMBOLS 1 Metal mold | die 2 1st metal mold | die 3 2nd metal mold | die 4 Cavity 5 Burr 6 Molded product 7 Pinch-off part 8 Space 9 End of skin material 10 Cavity surface 11 Skin material 12 Parison 13 Indentation 14 Air blowing means 15 Hook 17 Small burrs 18 Protrusion 19 Recess 20 Slide plate 21 Air inlet

Claims (10)

A mold for molding a molded article with a skin having a skin material on the surface,
A pinch-off portion that presses the molding material of the molded product to form a cutting line; and
A mold comprising: a separation part having a space for preventing adhesion between the skin material and the molding material outside the pinch-off part.   The mold according to claim 1, wherein the pinch-off portion is provided at a location where a corner portion of the molded product is formed. The separation part has a space for storing the skin material;
The mold according to claim 1, further comprising a space for storing the molding material.   3. The mold according to claim 1, wherein the separation part has a space at least equal to or greater than a total thickness of a thickness of the skin material and a thickness of the molding material.   The mold according to claim 4, wherein the separation unit has holding means for maintaining the position of the skin material by hooking the skin material.   The mold according to claim 4 or 5, wherein the separation part has air blowing means for blowing gas into the space.   7. The mold according to claim 1, further comprising a deburring unit that cuts only the molding material separated from the skin material outside the cutting line.   A molded article with a skin, wherein a portion of the skin material molded using the mold according to any one of claims 1 to 7 that is not adhered to the molding material is adhered to the molding material. . A step of arranging a skin material on one of the molds according to any one of claims 1 to 7;
A method of producing a molded article with a skin, comprising: blowing a gas onto a molding material in a molten state to attach the molding material to a depression of the mold that forms the space.   10. The method for manufacturing a molded article with a skin according to claim 9, further comprising a step of cutting only the molding material outside the cutting line by the deburring means in the pinch-off portion after fitting the mold.

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