JP5347339B2 - Molding device - Google Patents

Description

  The present invention is not limited thereto, but particularly relates to a mold apparatus suitable for compression molding of a synthetic resin thin container having a relatively large depth with respect to the inner diameter.

As is well known, cup-shaped synthetic resin thin-walled containers having a relatively large depth with respect to the inner diameter are widely used as food containers. Such a thin-walled container is compressed or injection-molded using a mold member composed of a male member and a female member, as disclosed in Patent Document 1 below. In the case of compression molding, in the open state in which the male member and the female member are separated from each other, a soft or molten synthetic resin material is supplied to the male member or the female member, and then the male member And the female member are closed so as to define a molding cavity between them, thereby compressing and molding the synthetic resin material into the container. When the compression molded container is sufficiently cooled, the mold apparatus is opened and the molded container is taken out from the mold apparatus.
International Publication No. 2008/032841 Pamphlet

  However, according to the experiences of the present inventors, the following problems to be solved exist in the conventional mold apparatus. In particular, when the molded product is a cup-shaped synthetic resin thin container having a relatively large depth with respect to the inner diameter, the molded product closely adheres to a male member or a female member over a considerable area. Thus, it has been difficult to smoothly remove the molded product from the mold apparatus. In the case of compression molding, the male member and the female member are usually arranged facing each other in the vertical direction. However, when the molding device is opened after compression molding, If the molded product remains on the male member or female member, the synthetic resin material for the next compression molding is placed on the male member or female member after the molded product is detached from the male member or female member. It is necessary to supply, and the molding process efficiency is limited (if the molded product remains on the upper or lower female member when the molding device is opened, the upper part The molding efficiency can be improved by performing in parallel the detachment of the molded product from the female member or male member located in the position and the supply of the synthetic resin material to the male member or female member located below. it can).

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that the molded product is sufficiently smoothly from the mold apparatus even in the case of a synthetic resin thin-walled container having a relatively large depth with respect to the inner diameter. It is to provide a new and improved mold apparatus which makes it possible to take out a molded product.

  Another technical problem of the present invention is that, in addition to the achievement of the main technical problem, when the male member and the female member are arranged facing each other in the vertical direction, the mold apparatus is opened after the compression molding. In this state, the molded product is allowed to remain in the upper female member or the male member without causing a problem, so that the molded product is detached from the upper female member or the male member and lower. It is to provide a new and improved mold apparatus capable of increasing the molding efficiency by simultaneously performing the supply of the synthetic resin material to the male mold member or the female mold member located in the mold.

  According to one aspect of the present invention, the male member is composed of a central main member and an annular member disposed around the central main member, and the outer peripheral surface of the central main member of the male member and the annular member An annular gap allowing gas flow is formed between the inner peripheral surface and the male member is provided with pressurized gas supply means for supplying pressurized gas to the molding cavity through the annular gap. When the male member and the female member are moved to the open state from the state where the mold member and the female member are set in the closed state and the molded product is molded in the molding cavity, the pressurized gas supply means Starts the supply of pressurized gas, and as a result, the molded product can be separated from the male member together with the female member, thereby achieving the main technical problem.

  According to another aspect of the present invention, the female member is composed of a central main member and an annular member disposed around the central main member, and the outer peripheral surface of the front end portion of the central main member of the female member is An annular gap that allows gas flow is formed between the inner peripheral surface of the front end portion of the annular member, and a pressurized gas supply means for supplying pressurized gas to the forming cavity through the annular gap is attached to the female member. When the male member and the female member are moved to the open state from the state in which the male member and the female member are set in the closed state and the molded product is formed in the molding cavity, the addition is performed. The main technical problem is achieved by the pressurized gas supply means starting the supply of the pressurized gas, whereby the molded product can be separated from the female member together with the male member. The

That is, according to the first aspect of the present invention, the molding apparatus that achieves the main technical problem is composed of a male member and a female member, and the male member and the female member are relative to each other. The male member is moved between the central main member and the central main member, the closed state defining the molding cavity between the two and the open state spaced apart from each other. An annular member disposed, and the distal end surface of the central main member, the front end portion of the outer peripheral surface of the central main member, and the distal end surface of the annular member cooperate with the female member to define the molding cavity. In the mold apparatus to
An annular gap allowing gas flow is formed between the outer peripheral surface of the central main member of the male member and the inner peripheral surface of the annular member, and the annular gap is formed in the male member. A pressurized gas supply means for supplying pressurized gas to the molding cavity is provided, the male mold member and the female mold member are set in the closed state, and a molded product is molded in the molding cavity. When the male member and the female member are moved to the open state from the state of being present, the pressurized gas supply means starts to supply pressurized gas. There is provided a mold apparatus characterized in that it is separated from the male mold member together with the female mold member.

  Preferably, the annular member of the male member moves relative to the central main member between a defined position for defining the molding cavity and a discharge position advanced from the defined position. A pressure receiving space is defined between the central main member and the annular member, and the pressurized gas supply means supplies pressurized gas to the annular gap through the pressure receiving space; When the pressurized gas is supplied, the annular member is advanced from the defined position to the discharge position. The outer peripheral surface of the central main member of the male member has a frustum-shaped defining portion continuing from the tip surface and a columnar continuation portion following the defining portion, and the annular member is located at the defined position. The annular member is preferably located around the continuation of the central main member when it is fastened. It is preferable that an annular shoulder surface facing the female member side is formed in the continuation portion of the male member, and the pressure receiving space is defined between the annular shoulder surface and the annular member. The male member and the female member are advantageously arranged so as to face each other in the vertical direction with the male member downward and the female member upward.

According to the second aspect of the present invention, the mold apparatus for achieving the main technical problem is composed of a male member and a female member, and the male member and the female member are relatively The female mold member is disposed around the central main member and the central main member. The closed state defines the molding cavity between the two and the open state separated from each other. A molding device in which a recess formed in a central portion of the central main member defines the molding cavity in cooperation with the male mold member,
Between the outer peripheral surface of the front end portion of the central main member of the female mold member and the inner peripheral surface of the front end portion of the annular member, an annular gap that allows gas flow is formed. Pressurized gas supply means for supplying pressurized gas to the molding cavity through an annular gap is attached, the male mold member and the female mold member are set in the closed state, and a molded product is molded in the molding cavity. When the male member and the female member are moved to the open state from the state of being pressed, the pressurized gas supply means starts supplying pressurized gas, and the molding is caused by this. A mold apparatus is provided wherein the article is spaced apart from the female mold member with the male mold member.

  Preferably, the annular member of the female member is advanced relative to the central main member and a defined position located when the male member and the female member are in the closed state and the defined position. A pressure receiving space is defined between the central main member and the annular member, and the pressurized gas supply means is connected to the annular via the pressure receiving space. Pressurized gas is supplied to the gap and the annular member is advanced from the defined position to the discharge position by supplying the pressurized gas. An annular shoulder surface facing the male member is formed on the outer peripheral surface of the female member, and the pressure receiving space is preferably defined between the annular shoulder surface and the annular member. . Conveniently, the male member and the female member are disposed facing each other in the vertical direction with the female member facing downward and the male member facing upward.

  In the mold apparatus of the present invention, the release of the molded product from the male member or the female member is promoted by the action of the pressurized gas supplied to the molding cavity through the annular gap, and thus the molded product is in relation to the inner diameter. Even in the case of a synthetic resin thin-walled container having a relatively large depth, the molded product can be taken out sufficiently smoothly from the mold apparatus. In addition, when a male member or a female member having an annular gap to which pressurized gas is supplied is positioned below and the male member and the female member are disposed corresponding to the vertical direction, the molding is performed after the molding. When the mold apparatus is opened, the molded product is allowed to remain in the upper female member or male member without causing a problem, and thus the molded product from the upper female member or male member. The molding efficiency can be increased by performing the separation of the resin and the supply of the synthetic resin material to the male member or the female member positioned below in parallel.

  Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a mold apparatus constructed according to the present invention will be described in more detail.

  FIGS. 1-3 illustrate a first preferred embodiment of a mold apparatus constructed in accordance with the present invention. The mold apparatus is composed of a male mold member 2 and a female mold member 4. In the illustrated embodiment, the male member 2 and the female member 4 are arranged to face each other in the vertical direction, and the male member 2 is positioned below and the female member 4 is positioned above. The female mold member 4 is moved in the vertical direction between the lowered position shown in FIG. 1 and the raised position shown in FIG. When the female member 4 is positioned at the lowered position shown in FIG. 1, the mold apparatus is closed, and the male member 2 and the female member 4 cooperate to define a molding cavity (in FIG. 1). Is a molded product 6 which is compression-molded in the molding cavity). When the female mold member 4 is positioned at the raised position shown in FIG. 3, the mold apparatus is opened and the female mold member 4 is separated from the male mold member 2. Instead of moving the female mold member 4 up and down, or in addition to this, the male mold member 2 can be moved up and down to open and close the mold apparatus.

  The male member 2 is composed of a central main member 8 and an annular member 10. The illustrated central main member 8 includes a base 12, a main body 14 and an annular piece 16. The base 12 has a disk shape and is fixed to an appropriate stationary support structure (not shown). The main body 14 located on the base 12 includes a truncated cone-shaped defining portion 20 that follows the circular tip surface (that is, the upper surface) 18, a cylindrical continuation portion 22 that follows the defining portion 20, and a cylindrical lower portion 24. A slight bulging portion 21 (FIG. 3) is formed at the lower end portion of the defining portion 20. An annular flange 26 is formed at the lower end of the lower portion 24. A concave recess is formed at the center of the distal end surface 18. The outer diameter of the continuation portion 22 is substantially the same as the outer diameter of the lower end of the defining portion 20. The outer diameter of the lower portion 22 is larger than the outer diameter of the continuation portion 20, and an annular shoulder surface 28 facing upward (that is, facing the female member 4 side) is formed at the boundary between the continuation portion 22 and the lower portion 24. Yes. The main body 14 is fixed on the base 12 by an appropriate fixing means (not shown) such as a fastening bolt screwed to the base 12 through an annular flange 26, for example. The annular piece 16 has an upper portion 30 having a relatively small outer diameter and a lower portion 32 having a relatively large outer diameter, and an annular shoulder surface 35 facing upward is formed at the boundary between the upper portion 30 and the lower portion 32. Yes. The inner diameter of the upper portion 30 corresponds to the outer diameter of the lower portion 24 of the main body 14, and the inner diameter of the lower portion 32 corresponds to the outer diameter of the flange 26 of the main body 14. The annular piece 16 is also fixed on the base 12 by appropriate fixing means (not shown) such as a fastening bolt that is screwed to the base 12 through the lower portion 32 thereof. The upper surface of the annular piece 16 is flush with the annular shoulder surface 28 of the main body 14 and forms an extended surface of the annular shoulder surface 28.

  The annular member 10 in the male member 2 is composed of a first annular piece 34 and a second annular piece 36. The first annular piece 34 has an inner diameter corresponding to the outer diameter of the continuation portion 22 of the main body 14. On the upper surface of the first annular piece 34, an annular ridge 38 protruding upward from the inner peripheral edge is formed. A slight annular recess 39 (FIG. 3) is formed on the inner peripheral edge of the annular protrusion 38. The annular recess 39 also defines a forming cavity in cooperation with the defining portion 20 of the main body 14. An annular protrusion 40 is formed on the inner peripheral edge of the lower surface of the first annular piece 34. The second annular piece 36 has a substantially short cylindrical shape, the upper inner diameter thereof corresponds to the outer diameter of the annular protrusion 40 formed on the lower surface of the first annular piece 34, and the lower inner diameter thereof is that of the annular piece 16. This corresponds to the outer diameter of the upper portion 30. The second annular piece 36 has an inner peripheral surface upper portion brought into close contact with the outer peripheral surface of the annular protrusion 40 of the first annular piece 34 and an upper surface thereof brought into close contact with the lower surface of the first annular piece 34, and appropriate fixing means. It is fixed to the first annular piece 34 (not shown). The annular member 10 composed of the first annular piece 34 and the second annular piece 36 fixed to each other is shown in the prescribed position shown in FIGS. It is combined with the main body 14 so as to be movable between the discharge positions.

  In the male member 2, the gas is allowed to flow between the outer peripheral edge of the continuous portion 22 of the main body 14 and the inner peripheral edge of the first annular piece 34 of the annular member 10, but the inflow of the synthetic resin material is prevented. It is important that an annular gap 42 of the size is created. The gap dimension of such an annular gap may be about 0.01 to 0.03 mm. Further, in the illustrated embodiment, the annular shoulder surface 28 of the main body 14 and the upper surface of the annular piece 16 forming the extended surface of the annular shoulder surface 28 and the lower surface of the first annular piece 34 of the annular member 10 are interposed. The pressure receiving space 44 (FIG. 2) is defined (as will be further described later, pressurized gas is allowed to flow into the pressure receiving space 44). The second annular piece 36 of the annular member 10 is formed with a flow path 46 that extends in the radial direction and has an inner end connected to the pressure receiving space 44. A pressurized gas supply source 48, which may be pressurized air, is connected to the flow path 46 via an open / close control valve 50. The flow path 46, the supply source 48, and the open / close control valve 50 constitute a pressurized gas supply means. Between the inner peripheral surface of the second annular piece 36 of the annular member 10 and the outer peripheral surface of the upper portion 30 of the annular piece 16, an annular packing 52 is provided for maintaining an airtight state therebetween. As will be further described later, the pressurized gas supplied to the flow path 46 is caused to flow into the annular gap 42 through the pressure receiving space 44. If necessary, grooves (not shown) are formed in the lower surface of the first annular piece 34 or the upper surface of the annular piece 16 and the annular shoulder surface 28 so as to be aligned with the flow path 46, and the pressure receiving space 44 from the flow path 46. Inflow of pressurized gas into the can be facilitated.

  1 to 3, the illustrated female member 4 is also composed of a central main member 54 and an annular member 56. The central main member 54 includes a substrate 58, a main body 60 and an annular piece 62. The substrate 58 is fixed to a movable structure (not shown) that can be moved up and down. The main body 60 has a truncated cone-shaped lower portion 66, a columnar intermediate portion 68, and a columnar upper portion 70 that follow a circular tip surface (ie, lower surface) 64. An annular flange 72 is formed at the upper end of the upper portion 70. Formed on the distal end surface 64 is a molding recess 74 that defines a molding space. The outer diameter of the intermediate portion 68 is larger than the outer diameter of the upper end of the lower portion 66, and an annular shoulder surface 76 facing downward is formed at the boundary between the lower portion 66 and the intermediate portion 68. The outer diameter of the upper part 70 is larger than the outer diameter of the intermediate part 68, and an annular shoulder surface 78 facing downward is also formed at the boundary between the intermediate part 68 and the upper part 70. Such a main body 60 is fixed to the substrate 58 by appropriate fixing means (not shown) such as a fastening bolt screwed to the substrate 58 through an annular flange 72, for example. The annular piece 62 has a lower portion 80 having a relatively small inner diameter and an upper portion 82 having a relatively large inner diameter, and an annular shoulder surface 84 facing upward is formed at the boundary between the lower portion 80 and the upper portion 82. The inner diameter of the lower portion 80 of the annular piece 62 corresponds to the outer diameter of the upper portion 70 of the main body 60, and the inner diameter of the upper portion 82 corresponds to the outer diameter of the annular flange 72 of the main body 60. The annular piece 62 is also fixed to the substrate 58 by appropriate fixing means (not shown) such as a fastening bolt that passes through the annular piece 62 and is screwed to the substrate 58.

  The annular member 56 includes a first annular piece 86 and a second annular piece 88. The first annular piece 86 has a lower portion 90 having a frustoconical inner peripheral surface corresponding to the outer shape of the lower portion 66 of the main body 60 and a cylindrical inner peripheral surface having an inner diameter corresponding to the outer diameter of the intermediate portion 68 of the main body 60. And an upper portion 92. An annular recess 94 is formed on the inner peripheral edge of the lower surface of the first annular piece 86. The bottom surface of the annular recess 94 is flush with the front end surface of the main body 60. As will be further described later, the inner peripheral edge of the bottom surface of the annular concave surface 94 cooperates with the front end surface 64 of the main body 60 and the molding recess 74. Define the forming cavity. The second annular piece 88 has a short cylindrical shape having an inner diameter corresponding to the outer diameter of the intermediate portion 68 of the main body 60. An annular recess 96 having an inner diameter corresponding to the outer diameter of the first annular piece 86 is formed on the lower surface of the second annular piece 88. The second annular piece 88 is in a state in which the upper end portion of the first annular piece 86 is accommodated in an annular recess 96 formed on the lower surface thereof, and is fixed by an appropriate fixing means (not shown). It is fixed to. The annular member 56 composed of the first annular piece 86 and the second annular piece 88 is somewhat displaced downward from the prescribed position shown in FIGS. 1 to 3 and the prescribed position with respect to the central main member 54. Appropriate moving means (not shown) such as a fluid pressure cylinder mechanism is disposed between the central main member 54 and the annular member 56.

  The operation of the mold apparatus as described above is as follows. In FIG. 1, the female member 4 is lowered and the male member 2 and the female member 4 are in a closed state. A molded product (synthetic resin thin-walled container 6) having a relatively large depth with respect to the inner diameter is present in the molding cavity. When the molded product 6 is sufficiently cooled and reaches a temperature at which it can be taken out, the female member 4 starts to rise as shown in FIG. In the mold apparatus constructed according to the present invention, pressurized gas, which is compressed air, is supplied to the flow path 46 at the same time as the female mold member 4 rises or slightly before this. The pressurized gas flows from the flow path 46 into the pressure receiving space 44 and flows into the annular gap 42 through the pressure receiving space 44. The pressurized gas flowing into the pressure receiving space 44 moves the annular member 8 of the male member 2 from the specified position shown in FIG. 1 to the discharge position shown in FIG. Therefore, the annular recess 39 (FIG. 3) formed on the front end surface of the first annular piece 34 of the annular member 8 acts on the annular flange 98 (FIG. 3) formed on the lower end of the molded product 6. The molded product 6 is forced upward and is forcibly separated from the main body 14 of the male member 2, more specifically, the front end surface 18 and the outer peripheral surface of the defining portion 20. At the same time, the pressurized air flowing into the annular gap 42 flows into the molding cavity, more specifically, between the defining portion 20 and the front end surface 18 of the main body 14 of the male mold member 2 and the molded product 6. The molded product 6 is forcibly detached from the main body 14. Thus, even when the molded product 6 is a synthetic resin thin-walled container having a relatively large depth with respect to the inner diameter, the molded product 6 can be separated from the male member 2 sufficiently smoothly and attached to the female member 4. Raised.

  When the female member 4 and the molded product 6 are sufficiently raised, the supply of pressurized gas to the flow path 46 is stopped, and the annular member 10 in the male member 2 is defined as shown in FIG. Return to position. When the female member 4 is raised to the open position shown in FIG. 3, the annular member 56 of the female member 4 is displaced somewhat downward by the moving means (not shown), and the annular flange of the molded product 6 is 98 is forced downward, whereby the molded product 6 is detached from the main body 60 of the female member 4 and the molded product 6 is taken out. During the removal of such a molded product 6, the inside of the concave recess formed on the front end surface 18 of the main body 14 of the male member 2 by a known synthetic resin material supply means (not shown). In addition, a softened or molten synthetic resin material for the next molded product compression molding can be supplied. Thereafter, the female member 4 is lowered to the closed position shown in FIG. 1, and the synthetic resin material is compression-molded.

  4 to 6 illustrate a second preferred embodiment of a mold apparatus constructed in accordance with the present invention. In the second embodiment, the female member 104 is positioned downward and the male member 102 is positioned upward, and the female member 104 and the male member 102 are arranged facing each other in the vertical direction.

  The substrate 158 of the female member 104 is fixed to an appropriate stationary support structure (not shown). Gas flow is allowed between the outer peripheral surface of the truncated cone-shaped upper portion 166 of the main body 160 of the central main member 154 and the inner peripheral surface of the first annular piece 186 of the annular member 156 in the female member 104. An annular gap 142 for preventing the inflow of the synthetic resin material is generated. A pressure receiving space 144 (FIG. 5) is defined between the annular shoulder surface 196 (facing the male member 102 side) of the main body 154 and the lower surface of the first annular piece 186. The first annular piece 186 is formed with a flow path 146 that extends through in the radial direction and has an inner end connected to the pressure receiving space 144. A pressurized gas supply source 148, which may be pressurized air, is connected to the flow path 146 via an open / close control valve 150. The flow path 146, the supply source 148, and the open / close control valve 150 constitute a pressurized gas supply means. Between the inner peripheral surface of the second annular piece 188 and the outer peripheral surface of the intermediate portion 168 of the main body 160, an annular packing 152 is provided for maintaining an airtight state therebetween. If necessary, a groove (not shown) is formed on the lower surface of the first annular piece 186 or the upper surface of the annular shoulder surface 196 of the main body 160 so as to be aligned with the channel 146, and from the channel 146 to the pressure receiving space 144. Inflow of pressurized gas can be promoted.

  The substrate 112 of the male member 102 is fixed to a movable structure (not shown) that can be moved up and down. The annular member 110 of the male member 102 is movable between a specified position shown in FIGS. 4 to 6 with respect to the central main member 108 and a discharge position slightly displaced downward from the specified position. A suitable moving means (not shown) such as a cylinder mechanism is disposed between the central main member 108 and the annular member 110. In the embodiment shown in FIGS. 102 is not provided with the annular gap 42, the pressure receiving space 44, and the flow path 46 in the embodiment shown in FIGS. 1 to 3.

  Configurations other than the above-described configuration in the second embodiment illustrated in FIGS. 4 to 6 are substantially the same as the configurations of the first embodiment illustrated in FIGS. Therefore, the description about these structures is abbreviate | omitted.

  The operation of the mold apparatus shown in FIGS. 4 to 6 is as follows. In FIG. 4, the male member 102 is lowered and the female member 104 and the male member 102 are in a closed state. A molded product 106 (a synthetic resin thin-walled container having a relatively large depth relative to the inner diameter) 106 exists in the molding cavity. When the molded product 106 is sufficiently cooled to reach a temperature at which it can be taken out, the male member 102 starts to rise as shown in FIG. Pressurized gas, which may be compressed air, is supplied to the flow path 146 at the same time or slightly before the ascent of the male member 102. The pressurized gas flows into the pressure receiving space 144 from the flow path 146 and flows into the annular gap 142 through the pressure receiving space 144. The pressurized gas flowing into the pressure receiving space 144 moves the annular member 156 of the female member 104 from the specified position shown in FIG. 4 to the discharge position shown in FIG. Accordingly, the inner peripheral edge of the front end face of the first annular piece 186 of the annular member 156 acts on the annular flange 198 (FIG. 6) formed at the upper end of the molded product 106 to force the molded product 106 upward. The female member 104 is forcibly removed from the main body 160, more specifically, the molding recess 174. At the same time, the pressurized air that has flowed into the annular gap 142 flows into the molding cavity, more specifically, between the molding recess 174 and the molded product 106 in the main body 160 of the female mold member 104, and molding from the main body 160 of the female mold member 104. The product 106 is forcibly removed. Thus, even when the molded product 106 is a synthetic resin thin-walled container having a relatively large depth with respect to the inner diameter, the molded product 106 is sufficiently smoothly detached from the female mold member 104 and attached to the male mold member 102. Raised.

  When the male member 102 and the molded product 106 are sufficiently raised, the supply of pressurized gas to the flow path 140 is stopped, and the annular member 156 in the female member 104 is defined as shown in FIG. Return to position. When the male member 4 is raised to the open position shown in FIG. 6, the annular member 110 in the male member 102 is displaced somewhat downward by the moving means (not shown), and the annular flange of the molded product 6 is 98 is forced downward, whereby the molded product 106 is detached from the main body 114 of the male mold member 102 and the molded product 106 is taken out. While the molded product 106 is being taken out, the next molded product compression molding is performed in the molding recess 174 of the main body 160 of the female member 104 by a known synthetic resin material supply means (not shown). It is possible to supply a softened or molten synthetic resin material. Thereafter, the male member 102 is lowered to the closed position shown in FIG. 4, and the synthetic resin material is compression-molded.

  The preferred embodiments of the mold apparatus constructed according to the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to such embodiments and departs from the scope of the present invention. It is not necessary to say variously that various modifications and corrections are possible. For example, the mold apparatus of the present invention has been described in relation to compression molding of a synthetic resin thin-walled container having a relatively large depth relative to the inner diameter, but the mold apparatus of the present invention is not limited to compression molding. The present invention can also be applied to injection molding, and can also be applied to molding of other forms of synthetic resin containers or molded articles other than synthetic resin containers.

Sectional drawing which shows 1st suitable embodiment of the shaping | molding die apparatus comprised according to this invention in a closed state with a male mold member and a female mold member. Sectional drawing which shows the shaping | molding die apparatus shown in FIG. 1 in the state immediately after the raising of a female-type member was started. Sectional drawing which shows the shaping | molding die apparatus shown in FIG. 1 in the state by which the female-type member was raised to the open position. Sectional drawing which shows 2nd preferable embodiment of the shaping | molding die apparatus comprised according to this invention in a closed state with a female mold member and a male mold member. Sectional drawing which shows the shaping | molding die apparatus shown in FIG. 4 in the state immediately after the raising of a male mold member was started. Sectional drawing which shows the shaping | molding die apparatus shown in FIG. 3 in the state by which the male mold member was raised to the open position.

Explanation of symbols

2: male member 4: female member 6: molded product 8: central main member of male member 10: annular member of male member 42: annular gap 44: pressure receiving space 46: flow path 54: center of female member Main member 56: annular member of female member 102: male member 104: female member 106: molded product 110: annular member of male member 142: annular gap 144: pressure receiving space 146: flow path
154: Central main member of female member 156: Annular member of female member

Claims (9)

A male member and a female member are configured, and the male member and the female member are moved in a relatively approaching and separating direction so as to define a molding cavity therebetween and spaced apart from each other. The male member includes a central main member and an annular member disposed around the central main member. The front end surface of the central main member and the front end of the outer peripheral surface of the central main member In a mold apparatus in which the distal end surface of the portion and the annular member cooperates with the female mold member to define the mold cavity,
An annular gap allowing gas flow is formed between the outer peripheral surface of the central main member of the male member and the inner peripheral surface of the annular member, and the annular gap is formed in the male member. A pressurized gas supply means for supplying pressurized gas to the molding cavity is provided, the male mold member and the female mold member are set in the closed state, and a molded product is molded in the molding cavity. When the male member and the female member are moved to the open state from the state of being present, the pressurized gas supply means starts to supply pressurized gas. A molding apparatus characterized by being separated from the male mold member together with the female mold member.   The annular member of the male member is movable relative to the central main member between a defined position for defining the molding cavity and a discharge position advanced from the defined position. A pressure receiving space is defined between the central main member and the annular member, and the pressurized gas supply means supplies the pressurized gas to the annular gap through the pressure receiving space, and the pressurized gas. The mold apparatus according to claim 1, wherein the annular member is advanced from the defined position to the discharge position by being supplied.   The outer peripheral surface of the central main member of the male member has a frustum-shaped defining portion continuing from the tip surface and a columnar continuation portion following the defining portion, and the annular member is located at the defined position. The mold apparatus according to claim 2, wherein the annular member is positioned around the continuation portion of the central main member when being fastened.   4. An annular shoulder surface facing the female member side is formed in the continuation portion of the male member, and the pressure receiving space is defined between the annular shoulder surface and the annular member. Mold equipment.   The molding according to any one of claims 1 to 4, wherein the male member and the female member are disposed so as to face each other in the vertical direction with the male member facing downward and the female member facing upward. Mold device. A male member and a female member are configured, and the male member and the female member are moved in a relatively approaching and separating direction so as to define a molding cavity therebetween and spaced apart from each other. The female member includes a central main member and an annular member disposed around the central main member, and a recess formed in the central portion of the central main member is the male member. In a mold apparatus for defining the mold cavity in cooperation with a mold member,
Between the outer peripheral surface of the front end portion of the central main member of the female mold member and the inner peripheral surface of the front end portion of the annular member, an annular gap that allows gas flow is formed. Pressurized gas supply means for supplying pressurized gas to the molding cavity through an annular gap is attached, the male mold member and the female mold member are set in the closed state, and a molded product is molded in the molding cavity. When the male member and the female member are moved to the open state from the state of being pressed, the pressurized gas supply means starts supplying pressurized gas, and the molding is caused by this. A mold apparatus characterized in that the product is separated from the female mold member together with the male mold member.   The annular member of the female member is advanced relative to the central main member from a prescribed position and a prescribed position that are located when the male member and the female member are in the closed state. A pressure receiving space is defined between the central main member and the annular member, and the pressurized gas supply means is added to the annular gap via the pressure receiving space. The mold apparatus according to claim 6, wherein a pressurized gas is supplied, and the annular member is advanced from the specified position to the discharge position by supplying the pressurized gas.   8. An annular shoulder surface facing the male member is formed on the outer peripheral surface of the female member, and the pressure receiving space is defined between the annular shoulder surface and the annular member. Mold equipment.   The molding according to any one of claims 6 to 8, wherein the male member and the female member are disposed so as to face each other in the vertical direction with the female member facing downward and the male member facing upward. Mold device.

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