JP2017087476A - Mold device and method for manufacturing resin member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold device which reduces an amount of a waste to be generated with a simple structure, and can be taken out integrally with the waste.SOLUTION: A mold device 1 for molding a resin member 5 made from a thermosetting resin includes: a ground side mold 10 capable of supplying a softened thermosetting resin; an intermediate mold 20 that forms a runner 100 communicating with the inside of the ground side mold 10 between the intermediate mold and the ground side mold 10; and a top side mold 30 that forms a molding space 300 capable of molding the resin member 5 between the top side mold and the intermediate mold 20. In the mold device 1, mold release resistance between thermosetting resins 71, 72 and 73 of the runner 100 and the intermediate mold 20 is small compared to the mold release resistance between the thermosetting resins 71, 72 and 73 and the ground side mold 10. When the waste 7 is peeled from the mold, first, the intermediate mold 20 is moved in a direction apart from the ground side mold 10, and the thermosetting resins 71, 72 and 73 are peeled from the intermediate mold 20. Then, the thermosetting resins 71, 72 and 73 are peeled from the ground side mold 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mold apparatus and a method for producing a resin member made of a thermosetting resin.

  2. Description of the Related Art Conventionally, there has been known a mold apparatus that manufactures a resin member that is a member having a desired shape made of a thermosetting resin by filling a molding space with a thermosetting resin that has been softened by heating. The mold apparatus has two molds that form a molding space having a desired shape. For example, in Patent Document 1, a lower mold having a heating pot that can heat a thermosetting resin and a molding space that can be filled with a softened thermosetting resin are formed between the lower mold and the lower mold. A mold apparatus with an upper mold is described.

Japanese Patent Laid-Open No. 5-124069

  The mold apparatus described in Patent Document 1 has a so-called two-plate mold configuration. In a two-plate mold apparatus, resin is supplied to a molding space formed between two molds to mold a resin member. However, in a mold apparatus of a two-plate mold, when molding a resin member, a thermosetting resin that is softened via a runner and a gate formed between two molds is sent to the molding space. When the resin member is taken out, the waste material made of the thermosetting resin cured by the runner and the resin member are taken out integrally. For this reason, the process of isolate | separating a waste material and a resin member is needed separately. In addition, in the two-plate mold apparatus, since it is necessary to provide a gate at the end of the resin member, the degree of freedom in selecting the position of the gate selected for controlling the flow of the resin is low.

  On the other hand, apart from the two molds, a sleep rate mold mold apparatus including a mold for supplying a resin capable of supplying a softened thermosetting resin is known. The sleep rate mold apparatus includes, for example, a lower mold for resin supply, an intermediate mold adjacent to the lower mold, and an upper mold adjacent to the intermediate mold. In this mold apparatus, the runner formed between the lower mold and the intermediate mold, and the thermosetting resin that is softened through the sprue and gate of the intermediate mold are sent to the molding space. In the mold apparatus of the sleep rate mold, the lower mold, the intermediate mold, and the upper mold are relatively movable. Therefore, when the resin member is taken out, the thermosetting cured by a runner or a sprue is performed. The waste material made of a functional resin and the resin member can be taken out separately. Thereby, since the gate can be provided at an arbitrary position of the resin member, the degree of freedom in selecting the position of the gate is high.

  However, the intermediate mold included in the sleep rate mold apparatus needs to include an ejector pin for releasing the waste material of the runner in addition to the ejector pin for releasing the molded resin member from the intermediate mold. There is. For this reason, the physique of the mold apparatus becomes large and the configuration becomes complicated, which may increase the cost of the mold and cause problems such as defective ejection. Further, as the size of the mold apparatus increases, the volume of sprue increases and the amount of waste material generated at a time increases. On the other hand, if the ejector pin for taking out the waste material of the runner is removed from the intermediate mold, when the waste material is taken out, the waste material may stick to the intermediate mold, and the waste material may be separated due to defective release of the waste material. If the separated waste material remains in the mold apparatus, molding failure of the resin member may occur.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a mold apparatus that can reduce the amount of waste material generated by a simple configuration and can take out the waste material as a single body. is there.

The mold apparatus of the present invention includes a first mold (10, 11), a second mold (20), a third mold (30), and a control unit (40).
The first mold is provided so that the thermosetting resin can be heated inside, and has a plunger (12) that can extrude the thermosetting resin softened by heating to the outside, and can supply the softened thermosetting resin. Is provided.
The second mold has a first flow path (200) through which the softened thermosetting resin can flow, and a second flow path (100) communicating the inside of the first mold and the first flow path. It is formed between the side facing the first mold and the first mold, and is provided so as to be movable relative to the first mold.
The third mold is formed on the side facing the second mold so as to communicate the molding space (300) in which the resin member (5) having a desired shape made of a thermosetting resin can be molded with the first flow path. It is formed between the two molds and is provided so as to be movable relative to the second mold and the first mold.
The control unit controls driving of the plunger, the second mold, and the third mold.
In the mold apparatus of the present invention, the mold release resistance between the thermosetting resin (71, 72, 73) cured in the second flow path and the second mold is cured in the second flow path. It is smaller than the mold release resistance between the thermosetting resin and the first mold.

  In the mold apparatus of the present invention, when the resin member is manufactured, the softened thermosetting resin flows from the inside of the first mold into the molding space through the second flow path and the first flow path. Among these, the thermosetting resin cured in the second flow path and the thermosetting resin cured in the first flow path are taken out from the mold apparatus as waste materials. In the mold apparatus of the present invention, the mold release resistance between the thermosetting resin cured in the second flow path and the second mold is the same as that of the thermosetting resin cured in the second flow path and the first mold. The second mold and the first mold are provided so as to be smaller than the mold release resistance between the molds. Thereby, when taking out a waste material from the metal mold | die apparatus of this invention, the thermosetting resin hardened | cured in a 2nd flow path can be released from a 2nd metal mold | die before a 1st metal mold | die. Therefore, since the ejector pin for releasing the thermosetting resin cured in the second flow path from the second mold can be released from the second mold even if it is not in the second mold. The configuration of the second mold can be simplified.

Moreover, since the structure of a 2nd metal mold | die can be simplified, the physique of a 2nd metal mold | die can be made small. As a result, the length of the first flow path that connects the second flow path and the molding space can be shortened, so the amount of thermosetting resin that cures in the first flow path is reduced, and the amount of waste material generated is reduced. can do.
In addition, since the thermosetting resin cured in the second flow path can be released from the second mold prior to the release from the first mold, it is integrated while suppressing distortion of the waste material. The waste material can be taken out from the mold apparatus as it is.

It is a schematic diagram of the metal mold apparatus by one Embodiment of this invention. It is a schematic diagram of the waste material which generate | occur | produces in the metal mold | die apparatus by one Embodiment of this invention. It is the III section enlarged view of FIG. It is the IV section enlarged view of FIG. It is a flowchart of the manufacturing method of the resin member by one Embodiment of this invention. It is a schematic diagram explaining the effect | action of the metal mold | die apparatus in the manufacturing method of the resin member by one Embodiment of this invention. It is a schematic diagram explaining the effect | action of the metal mold apparatus in the manufacturing method of the resin member by one Embodiment of this invention, Comprising: It is a schematic diagram explaining the effect | action different from FIG. It is a schematic diagram explaining the effect | action of the metal mold apparatus in the manufacturing method of the resin member by one Embodiment of this invention, Comprising: It is a schematic diagram explaining the effect | action different from FIG. It is a fragmentary sectional view of the metallic mold apparatus by other embodiments of the present invention. FIG. 10 is a partial cross-sectional view of a mold apparatus according to another embodiment different from FIG. 9 of the present invention. It is a fragmentary sectional view of the metal mold apparatus by other embodiment different from FIG. 9, 10 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(One embodiment)
A mold apparatus according to an embodiment of the present invention will be described with reference to FIGS.
The schematic diagram of the metal mold apparatus 1 by one Embodiment is shown in FIG. The mold apparatus 1 can mold a resin member 5 which is a member having a desired shape made of a thermosetting resin. In the mold apparatus 1 shown in FIG. 1, it is possible to mold a composite member 8 in which a metal member 6 is inserted into a resin member 5. In addition, the mold apparatus 1 of FIG. 1 has shown the state with which the thermosetting resin softened by heating is filled.

  The mold apparatus 1 is a mold apparatus having a so-called sleep rate mold configuration, and includes a ground mold 10, a heating pot 11, a plunger 12, a runner lock pin 13, and an intermediate as a “second mold”. A mold 20, a top mold 30 as a “third mold”, and a control unit 40 are provided. Between the ground mold 10 and the intermediate mold 20, a runner 100 is formed as a “second flow passage” through which the softened thermosetting resin can flow. A molding space 300 filled with a thermosetting resin is formed between the intermediate mold 20 and the top mold 30. The runner 100 and the molding space 300 are communicated with each other through a sprue 200 as a “first flow path” of the intermediate mold 20. For convenience of explanation, the upper side of FIGS. 1, 3, 4, 6, 7, 8 will be described as the “top” side, and the lower side of FIGS. The ground side mold 10, the heating pot 11, and the plunger 12 correspond to the “first mold” described in the claims.

  The ground side mold 10 is a member formed from a metal located on the ground side of the mold apparatus 1. The ground side mold 10 has holes 101 and 102 that open to the intermediate mold 20 side. The hole 101 is formed with a constant inner diameter, for example. The hole 101 accommodates the heating pot 11 and the plunger 12. The hole 102 is formed so that the inner diameter on the ground side is larger than the inner diameter on the top side. That is, a step surface 103 is formed on the inner wall of the ground mold 10 that forms the hole 102. The hole 102 accommodates the runner lock pin 13 as an “engaging member”.

The heating pot 11 is a substantially cylindrical member made of metal. The heating pot 11 is provided so as not to move relative to the ground mold 10. In the heating pot 11, a thermosetting resin that is heated and softened can be stored. In one embodiment, the top end surface 111 of the heating pot 11 is located on the same plane as the top end surface 105 of the ground mold 10.
The plunger 12 is accommodated in the heating pot 11. The plunger 12 can reciprocate in the vertical direction while sliding on the inner wall of the heating pot 11. The plunger 12 can push the thermosetting resin heated and softened in the space on the top side of the plunger 12 in the heating pot 11 to the runner 100.

  The runner lock pin 13 is accommodated so as to be reciprocally movable in the vertical direction. The runner lock pin 13 is provided so that the top end 131 can protrude from the end face 105 of the ground mold 10 to the top. The runner lock pin 13 has a step surface 132 that can be engaged with the step surface 103 of the ground mold 10.

  The intermediate mold 20 is a member formed from a metal located on the top side of the ground mold 10. The intermediate mold 20 is provided so as to be movable in the top-to-bottom direction with respect to the ground-side mold 10, and can contact the end surface 105 of the ground-side mold 10 and the top-side mold 30. The intermediate mold 20 includes a ground-side concave portion 21, a sprue 200 as a “second flow path”, a top-side concave portion 22, and a ground-side ejector portion 23.

  The ground side recess 21 is located on the ground side of the intermediate mold 20 and has a space opened to the ground side. The space of the ground side recess 21 is formed so as to correspond to the holes 101 and 102 of the ground side mold 10. Specifically, as shown in FIG. 3, a substantially cylindrical space 211 is formed at a position corresponding to the hole 101. The space 211 communicates with the space on the top side of the plunger 12 in the heating pot 11. A substantially cylindrical space 212 having an inner diameter smaller than that of the space 211 is formed at a position corresponding to the hole 102. The ground side recess 21 has a space 213 that communicates the space 211 and the space 212. The spaces 211, 212, and 213 form the runner 100.

  The sprue 200 is formed so as to extend in the vertical direction, and communicates the space 212 and the molding space 300. The inner diameter of the sprue 200 decreases from the ground side toward the top side. The sprue 200 can distribute the softened thermosetting resin.

  The top recess 22 is located on the top side of the intermediate mold 20. The top recess 22 has a space that opens to the top. The space of the top recess 22 communicates with the sprue 200.

  The ground-side ejector portion 23 includes a plurality of ejector pins 231, a connecting member 232 that connects the plurality of ejector pins 231, a biasing member 233 that can bias the connecting member 232 to the top side, and the intermediate mold 20 and the top side It is composed of a regulating member 234 that regulates the movement of the connecting member 232 to the top side when the mold 30 is in contact. The plurality of ejector pins 231 are provided so as to protrude from the inner wall of the top recess 22 to the top. Thereby, the ground side ejector part 23 can push out the composite member 8 formed between the intermediate mold 20 and the top mold 30 to the top.

  The top mold 30 is a member formed from a metal located on the top side of the intermediate mold 20. The top mold 30 is provided so as to be movable in the top and bottom direction with respect to the intermediate mold 20 and the ground mold 10, and can contact the intermediate mold 20. The top side mold 30 has a ground side concave portion 31 and a top side ejector portion 32.

  The ground side recess 31 is located on the ground side of the top mold 30. The ground side recessed part 31 has the space opened to the ground side. The ground side concave portion 31 forms a molding space 300 and a mounting space 301 in which the metal member 6 is set before molding the resin member 5 together with the top side concave portion 22.

  The top ejector portion 32 includes a plurality of ejector pins 321, a connecting member 322 that connects the plurality of ejector pins 321, a biasing member 323 that can bias the connecting member 322 to the top, and the intermediate mold 20 and the top side. It comprises a regulating member 324 that regulates the movement of the connecting member 322 to the ground side when it is in contact with the mold 30. The plurality of ejector pins 321 are provided so as to protrude from the inner wall of the ground side recess 31 to the ground side. Thereby, the top side ejector part 32 can push out the composite member 8 formed between the intermediate mold 20 and the top mold 30 to the ground side.

  The control unit 40 includes a microcomputer having a CPU, RAM, ROM, and the like. The control unit 40 controls driving of the plunger 12, the intermediate mold 20, and the top mold 30 based on a program input in advance. In one embodiment, the intermediate mold 20 is driven to interlock with the top mold 30.

  Next, the shape of the waste material 7 formed when the composite member 8 is manufactured in the mold apparatus 1 will be described with reference to FIGS. FIG. 2 is a schematic view of the waste material 7 as seen from the direction of the top mold 30. The waste material 7 includes a first runner portion 71, a second runner portion 72, a third runner portion 73, a sprue portion 74 as “thermosetting resin cured in the first flow path”, and “cured in the first mold”. Cull portion 75 as the “thermosetting resin”. 2 and 3, the boundary lines of the first runner portion 71, the second runner portion 72, the third runner portion 73, the sprue portion 74, and the cull portion 75 are shown for convenience. The first runner portion 71, the second runner portion 72, and the third runner portion 73 correspond to “thermosetting resin cured in the second flow path” recited in the claims.

The first runner portion 71 is a thermosetting resin cured in the space 211. The first runner portion 71 is formed in a substantially truncated cone shape. The first runner portion 71 is formed so that the inner diameter becomes smaller toward the top.
The second runner portion 72 is a thermosetting resin cured in the space 212. The second runner portion 72 is formed in a columnar shape having a smaller outer diameter than the first runner portion 71. The second runner portion 72 has a size with which the runner lock pin 13 can be engaged. The third runner portion 73 is a thermosetting resin cured in the space 213. The third runner portion 73 is a substantially rod-like portion formed so as to extend from the radially outer side of the first runner portion 71 in the radially outward direction. The third runner portion 73 is formed to connect the first runner portion 71 and the second runner portion 72.
The sprue portion 74 is a substantially conical portion formed on the top side of the second runner portion 72. The top side of the sprue portion 74 is connected to the resin member 5 located in the molding space 300.
The cull portion 75 is a thermosetting resin cured in the space on the top side of the plunger 12 in the heating pot 11. The cull portion 75 is formed in a substantially cylindrical shape on the ground side of the first runner portion 71.

  The mold apparatus 1 is characterized by the relationship between the shape of the ground mold 10, the heating pot 11, and the plunger 12 and the shape of the intermediate mold 20. Here, the runner 100 will be described with reference to FIGS. 3 and 4 showing a state when the thermosetting resin is cured.

  As shown in FIG. 3, the thermosetting resin cured in the runner 100 is in contact with the inner walls forming the spaces 211, 212, and 213 in the ground side recess 21 of the intermediate mold 20. Further, the thermosetting resin cured in the runner 100 forms a space on the top side of the end surface 105 of the ground side mold 10, the end surface 111 of the heating pot 11, and the plunger 12 in the heating pot 11. The inner wall 112 as the “inner wall of the mold” and the end surface 121 of the plunger 12 are in contact with each other. In the mold apparatus 1, the contact area between the inner wall of the ground-side recess 21 and the waste material 7 is smaller than the contact area between the end surface 105, the end surface 111, the inner wall 112, and the end surface 121 and the waste material 7. In FIG. 3, the part which the inner wall of the ground side recessed part 21 and the waste material 7 contact is shown with the dashed-two dotted line S20. Moreover, the part which the end surface 105 of the ground side metal mold | die 10, the end surface 111 and the inner wall 112 of the heating pot 11, and the end surface 121 of the plunger 12 and the waste material 7 are contacting is shown with the dashed-dotted line S10.

In the mold apparatus 1, the draft of the inner wall formed along the top-to-bottom direction of the inner wall of the ground-side recess 21 is the draft of the inner wall formed along the top-and-bottom direction of the inner wall of the heating pot 11. The intermediate mold 20 and the heating pot 11 are formed to be larger.
Here, the “draft angle” refers to an angle formed by the direction in which the mold moves when the molded member is released from the mold and the surface where the mold and the member are in contact. In particular, it refers to an angle formed by a surface formed so as to extend in a direction relatively close to a direction in which the mold moves among surfaces where the mold and the member are in contact with each other.

  Specifically, of the inner walls of the ground-side recess 21, the inner walls excluding the top-side inner wall are “inner walls formed along the top-and-bottom direction of the inner walls of the ground-side recess 21”. For example, the inner wall 214 as the “inner wall of the second mold” of the ground-side recess 21 that contacts the radially outer side wall 711 of the first runner portion 71 is formed so as to follow the top-to-bottom direction of the inner wall of the ground-side recess 21. It corresponds to the “inner wall”. Therefore, the angle α formed by the inner wall 214 and the top-to-bottom direction corresponds to “the draft angle of the inner wall formed along the top-to-bottom direction among the inner walls of the ground-side recess 21”.

As shown in FIG. 4, the “inner wall formed along the top-and-bottom direction among the inner walls of the heating pot 11” refers to the inner wall 112 of the heating pot 11 that contacts the radially outer side wall 751 of the cull portion 75. Hit. Therefore, the angle formed by the inner wall 112 and the top / bottom direction corresponds to “the draft angle of the inner wall formed along the top / bottom direction of the inner wall of the heating pot 11”. In the mold apparatus 1, the angle formed between the inner wall 112 and the top-and-bottom direction is approximately 0 degrees.
In the mold apparatus 1, the intermediate mold 20 and the heating pot 11 are formed so that the angle α is larger than the angle formed by the inner wall 112 and the vertical direction.

  Next, a method for manufacturing a resin member in the mold apparatus 1 will be described with reference to FIGS.

  First, in step (hereinafter simply referred to as “S”) 11, the resin member 5 is molded as a molding process. In S <b> 11, the thermosetting resin tablet charged in the heating pot 11 is heated and softened to have fluidity, and the metal member 6 is set in the mounting space 301. After the base mold 10 and the intermediate mold 20 and the intermediate mold 20 and the top mold 30 are brought into contact with each other, the softened thermosetting resin is pushed out from the heating pot 11 by the plunger 12, The molding space 300 is press-fitted through the runner 100 and the sprue 200. Thereafter, when the thermosetting resin filled in the runner 100, the sprue 200 and the molding space 300 is cured, the composite member 8 having the resin member 5 and the waste material 7 are formed in the mold apparatus 1. At this time, the thermosetting resin in the space 212 is cured while being engaged with the end 131 of the runner lock pin 13.

  Next, in S <b> 12, the first runner portion 71 and the third runner portion 73 of the thermosetting resin cured in the runner 100 are released from the intermediate mold 20 as the first release step. In S <b> 12, the control unit 40 moves the intermediate mold 20 and the top mold 30 in the top direction while keeping the intermediate mold 20 and the top mold 30 in contact with each other and separates them from the ground mold 10. In one embodiment, the distance that the intermediate mold 20 and the top mold 30 move in the top direction in the first mold release step is the maximum thickness d7 of the thermosetting resin cured in the runner 100. The distance is shorter than twice. Thereby, as shown in FIG. 6, the first runner portion 71 and the third runner portion 73 are released from the intermediate mold 20. At this time, the ground side of the first runner portion 71 remains in close contact with the end surface 111 of the heating pot 11. Further, the cull portion 75 remains in close contact with the heating pot 11 and the plunger 12. Further, the sprue portion 74 connected to the second runner portion 72 remains in close contact with the inner wall of the intermediate mold 20 that forms the sprue 200.

  Next, in S <b> 13, the cull portion 75 is released from the plunger 12 as a second release step. In S13, the control unit 40 moves the plunger 12 in the ground direction. As a result, the cull portion 75 is released from the plunger 12, as shown in FIG.

  Next, in S14, the first runner portion 71 is released from the heating pot 11 as a third release step. In S14, the intermediate mold 20 and the top mold 30 are further moved in the top direction while the intermediate mold 20 and the top mold 30 are kept in contact with each other. As a result, the sprue portion 74 that remains in close contact with the inner wall of the intermediate mold 20 that forms the sprue 200 moves in the celestial direction by the intermediate mold 20 that moves in the celestial direction. At this time, since the second runner portion 72 connected to the sprue portion 74 also moves in the upward direction in the same manner as the sprue portion 74, the runner lock pin 13 engaged with the second runner portion 72 is also moved to the second runner portion. It moves to the celestial direction together with the unit 72.

  In S14, the control unit 40 moves the plunger 12 in the upward direction so as to follow the movement of the runner lock pin 13 that moves in the upward direction. When the plunger 12 moving in the top direction moves in the top direction even after contacting the ground end face 752 of the cull portion 75, the cull portion 75 is released from the close contact with the heating pot 11 and moves in the top direction. Thereby, the first runner portion 71 can be released from the heating pot 11.

  In S <b> 14, the control unit 40 moves the plunger 12 in the upward direction so as to follow the movement of the runner lock pin 13 even after the first runner unit 71 is released from the heating pot 11. This prevents the second runner portion 72 and the first runner portion 7110 moving in the top direction together with the sprue portion 74 from being separated.

  Next, in S15, the resin member 5 and the sprue portion 74 are cut as a gate cutting step. In S <b> 14, the first runner portion 71, the second runner portion 72, the third runner portion 73, and the cull portion 75 are pushed upward in the upward direction by the plunger 12 while the sprue portion 74 moves in the upward direction together with the intermediate mold 20. Yes. When the step surface 132 of the runner lock pin 13 moving in the top direction is engaged with the step surface 103 of the ground mold 10, the movement of the third runner portion 73 and the sprue portion 74 in the top direction is restricted. Thereby, the site | part which the resin member 5 and the sprue part 74 are connected is cut | disconnected. Almost simultaneously with the separation of the resin member 5 and the sprue portion 74, the sprue portion 74 is released from the intermediate mold 20, and the waste material 7 is released from the mold apparatus 1.

  Finally, in S16, only the top mold 30 is moved in the top direction as a taking-out process. At this time, the regulating member 234 that has been in contact with the end surface on the ground side of the top mold 30 can move in the top direction, and the ejector pin 231 protrudes in the top direction. Further, the regulating member 324 that has been in contact with the top end face of the intermediate mold 20 can move in the ground direction, and the ejector pin 321 projects in the ground direction. Thus, the composite member 8 is released from the intermediate mold 20 and the top mold 30 and is taken out from the mold apparatus 1.

  In the mold apparatus 1, the intermediate mold 20 is configured such that the contact area between the inner wall of the ground-side recess 21 and the waste material 7 is smaller than the contact area between the end surface 105, the end surface 111, the inner wall 112, and the end surface 121 and the waste material 7. A ground side mold 10, a heating pot 11, and a plunger 12 are formed. Further, the intermediate metal is formed such that the draft angle of the inner wall formed along the top-to-bottom direction of the inner wall of the ground-side recess 21 is larger than the draft angle of the inner wall formed along the top-to-bottom direction of the inner wall of the heating pot 11. A mold 20 and a heating pot 11 are formed. Thereby, the mold release resistance between the thermosetting resin cured in the runner 100 and the intermediate mold 20 is such that the thermosetting resin cured in the runner 100, the ground mold 10, the heating pot 11, and It becomes smaller than the mold release resistance between the plunger 12. Due to this difference in mold release resistance, when the waste material 7 is taken out from the mold apparatus 1, the thermosetting resin cured in the runner 100 may be released from the intermediate mold 20 before the ground mold 10 or the like. it can. Accordingly, the ejector pin for releasing the thermosetting resin cured in the runner 100 from the intermediate mold 20 can be released from the intermediate mold 20 without the intermediate mold 20. The configuration of the mold 20 can be simplified.

Since ejector pins can be reduced from the intermediate mold 20, the size of the intermediate mold 20 can be reduced. Thereby, since the length of the sprue 200 that communicates the runner 100 and the molding space 300 can be shortened, the amount of the thermosetting resin that is cured in the runner 100 is reduced, and the generation amount of the waste material 7 is reduced. Can do.
Moreover, since the physique of the intermediate mold 20 can be reduced, the physique of the mold apparatus 1 can be reduced, and the equipment cost of the mold apparatus 1 can be reduced.

  Since the thermosetting resin cured in the sprue 200 can be released from the intermediate mold 20 before the ground mold 10 and the like, the mold apparatus remains integrated while suppressing distortion of the waste material 7. The waste material 7 can be taken out from 1.

  Moreover, since the structure of the intermediate mold 20 can be simplified, the structure of the mold apparatus 1 is simplified, and the reliability of the mold apparatus 1 can be improved.

Since the ejector pin for releasing the waste material 7 from the intermediate mold 20 is not necessary, the operation of the mold apparatus 1 can be prevented from being stopped due to the malfunction of the ejector pin.
Moreover, when the ejector pin for releasing the waste material 7 is provided, the softened thermosetting resin enters the hole through which the ejector pin slides, and the waste material is likely to generate burrs. However, the intermediate mold 20 provided in the mold apparatus 1 does not require an ejector pin for separating the waste material 7 from the mold, so that the generation of burrs can be suppressed.

  In the method for producing a thermosetting resin using the mold apparatus 1, the first mold release step uses the difference in mold release resistance to cure the intermediate mold 20 to the runner 100 prior to the ground mold 10 and the like. Separate the thermosetting resin. Next, the thermosetting resin cured in the runner 100 and the heating pot 11 is released from the heating pot 11 and the plunger 12 by using the driving of the plunger 12 in the second releasing process and the third releasing process. . Thus, in the manufacturing method of the thermosetting resin using the mold apparatus 1, the runner 100 and the heating are performed by sequentially releasing the waste material 7 from a specific side so that the waste material 7 is not simultaneously subjected to a force from a plurality of directions. The thermosetting resin cured in the pot 11 is released. Thereby, the waste material 7 can be taken out with the cull part 75 to the sprue part 74 integrated. Therefore, since it becomes easy to collect the waste material 7, the collected thermosetting resin can be used effectively. Further, it is possible to prevent a part of the waste material 7 from being scattered outside the mold apparatus 1 and to keep the environment of the resin member manufacturing site in the mold apparatus 1 clean.

  In addition, since the waste material 7 is taken out from the mold apparatus 1 while being integrated, a part of the waste material 7 remains inside the mold apparatus 1 by managing the shape of the waste material 7 taken out from the mold apparatus 1. To prevent. Thereby, generation | occurrence | production of the defect in the process of manufacturing the following resin member can be prevented with a part of remaining waste material 7. FIG.

(Other embodiments)
In the above-described embodiment, the release resistance for the thermosetting resin cured in the runner is made different depending on the size of the contact area and the draft. However, the structure which makes mold release resistance different is not limited to this. Either the size of the contact area or the size of the draft angle may be used. Also, the mold release resistance between the thermosetting resin cured in the runner and the intermediate mold is the mold release resistance between the thermosetting resin cured in the runner and the ground side mold, the heating pot and the plunger. A surface treatment such as plating may be performed on the surface in contact with the thermosetting resin cured in the runner so as to be smaller than the resistance.

  In the above-described embodiment, in the first mold releasing step, the distance that the intermediate mold and the top mold move in the top direction is a distance that is at most shorter than twice the thickness of the runner waste material in the top and bottom direction. . However, the distance that the intermediate mold and the top mold move in the top direction is not limited to this.

In the above-described embodiment, the waste material has a cull portion that is a thermosetting resin cured in the heating pot. However, the “thermosetting resin cured in the first mold” may not be present. When there is no cull portion, in the resin member manufacturing method in the mold apparatus, in the second mold release step, the control unit moves the plunger in the ground direction so that the thermosetting resin cured in the runner is removed from the plunger. Release.
In FIG. 9, sectional drawing of the metal mold | die apparatus 2 as other embodiment is shown. In the mold apparatus 2, when forming the resin member 5, the plunger 12 reciprocates so that the top end surface 121 is flush with the end surface 111 of the heating pot 11. For this reason, the waste material 7 which does not have the cull part which is the thermosetting resin hardened | cured in the space of the top side of the plunger 12 in the heating pot 11 is formed. In this case, in the mold apparatus 2, the contact area between the inner wall of the ground-side recess 21 and the waste material 7 is smaller than the contact area between the end surface 105, the end surface 111, and the end surface 121 and the waste material 7. Thereby, the mold release resistance between the waste material 7 and the intermediate mold 20 is smaller than the mold release resistance between the waste material 7 and the ground side mold 10, the heating pot 11 and the plunger 12. Therefore, in the first release step, the first runner portion 71 and the third runner portion 73 can be released from the intermediate die 20 before the ground side die 10.

  In the above-described embodiment, the draft of the waste material on the ground side is the draft of the inner wall formed along the top-and-bottom direction of the inner wall of the heating pot. However, the draft on the ground side of the waste material is not limited to this.

  In FIG. 10, sectional drawing of the metal mold | die apparatus 3 as other embodiment is shown. In the mold apparatus 3, when molding the resin member 5, the plunger 12 reciprocates so that the top end surface 121 is flush with the end surface 111 of the heating pot 11. In this case, in the mold apparatus 3, the top end surface 111 of the heating pot 11 is formed on the ground side compared to the end surface 105 of the ground side mold 10. Thereby, the draft angle on the ground side of the waste material 7 becomes an angle formed between the inner wall 104 as the “inner wall of the first mold” of the ground side mold 10 contacting the side wall 753 of the cull portion 75 and the top and bottom direction. . In the mold apparatus 2, the intermediate mold 20 and the ground side mold 10 may be formed so that the angle α is larger than the angle formed by the inner wall 104 and the vertical direction.

Moreover, in FIG. 11, sectional drawing of the metal mold | die apparatus 4 as other embodiment different from FIG. 10 is shown. In the mold apparatus 4, the end surface 111 of the heating pot 11 is formed on the top side as compared to the end surface 105 of the ground mold 10. In this case, the draft on the ground side of the waste material 7 is not only the angle formed by the inner wall 112 and the top-and-bottom direction shown in the embodiment, but also the heating pot 11 in contact with the ground-side side wall 713 of the first runner portion 71. The angle formed by the outer wall 113 as the “wall surface of the first mold that forms the second flow passage” on the radially outer side and the vertical direction is also included. In the mold apparatus 4, the angle α may be formed so as to be larger than the angle formed between the inner wall 112 and the vertical direction or the angle formed between the outer wall 113 and the vertical direction.
In FIG. 11, the plunger 12 may move to a position where the end surface 121 of the plunger 12 is flush with the end surface 111 of the heating pot 11 formed on the top side of the end surface 105 of the ground mold 10. . In this case, the draft angle on the ground side of the waste material 7 is “the wall surface of the first mold that forms the second flow passage” on the radially outer side of the heating pot 11 that contacts the ground side wall 713 of the first runner portion 71. Only the angle formed by the outer wall 113 and the top-and-bottom direction.

  In the above-described embodiment, the distance that the intermediate mold and the top mold move in the top direction in the first mold releasing step is more than twice the thickness in the top and bottom direction of the thermosetting resin cured in the runner. It was a short distance. However, the distance that the intermediate mold and the top mold move in the top direction in the first mold release step is not limited to this.

  In the above-described embodiment, in the third mold releasing step, the control unit moves the plunger in the upward direction so as to follow the movement of the runner lock pin that moves in the upward direction. The control unit may not move the plunger so as to follow the movement of the runner lock pin.

  As mentioned above, this invention is not limited to such embodiment, It can implement with a various form in the range which does not deviate from the summary.

1, 2, 3, 4 ... mold apparatus 10 ... ground side mold (first mold)
11 ... Heating pot (first mold)
12 ... Plunger (first mold)
20 ... Intermediate mold (second mold)
30 ... Top mold (third mold)
40: Control unit 100: Runner (second flow passage)
200 ・ ・ ・ Sprue (first passage)
300 ... molding space

Claims (12)

A first mold (provided with a plunger (12) capable of extruding the thermosetting resin softened by heating, provided with a thermosetting resin inside) and capable of supplying the softened thermosetting resin ( 10, 11, 12),
A first flow path (200) through which the softened thermosetting resin can flow is provided, and a second flow path (100) communicating the inside of the first mold and the first flow path is defined as the first metal A second mold (20) formed between the side facing the mold and the first mold and movable relative to the first mold;
The side facing the second mold and the second mold so that a molding space (300) capable of molding a resin member (5) of a desired shape made of a thermosetting resin communicates with the first flow path. And a third mold (30) movable between the first mold and the second mold,
A control unit (40) for controlling the driving of the plunger, the second mold, and the third mold;
With
The mold release resistance between the thermosetting resin (71, 72, 73) cured in the second flow path and the second mold is the thermosetting resin cured in the second flow path. And a mold apparatus having a smaller mold release resistance than the first mold.   The contact area between the thermosetting resin cured in the second flow path and the second mold is the contact area between the thermosetting resin cured in the second flow path and the first mold. The mold apparatus according to claim 1, which is smaller than the mold apparatus.   The draft (α) of the inner wall (214) of the second mold forming the second flow passage is larger than the draft of the wall surface (113) of the first mold forming the second flow passage. Item 3. The mold apparatus according to Item 1 or 2.   The mold release resistance between the thermosetting resin cured in the second flow path and the second mold is such that the thermosetting resin cured in the second flow path and the first mold 2. The mold according to claim 1, wherein the mold release resistance between the first mold and the mold release resistance between the first mold and the thermosetting resin (75) cured in the first mold is small. Mold device.   The contact area between the thermosetting resin cured in the second flow path and the second mold is cured in the thermosetting resin cured in the second flow path and the first mold. The mold apparatus according to claim 4, wherein the mold area is smaller than a contact area between the thermosetting resin and the first mold.   The draft angle (α) of the inner wall (214) of the second mold forming the second flow path forms the draft angle of the inner wall (104, 112) of the first mold or the second flow path. The mold apparatus according to claim 4 or 5, wherein the mold apparatus is larger than a draft angle of the wall surface of the first mold. An engagement member (13) provided inside the first mold so as to be reciprocally movable and engageable with a thermosetting resin cured in the second flow path;
The mold apparatus according to claim 1, wherein the control unit moves the plunger so as to follow the movement of the engagement member. The first mold (10, 11) that can heat the thermosetting resin is softened by heating in the first mold (10, 11), and the second mold (20) has the first flow path (200) through the first flow path (200). A thermosetting resin filled in a molding space (300) formed between the third mold (30) located on the opposite side of the two molds from the first mold and the second mold. A resin member manufacturing method for forming a resin member (5) having a desired shape comprising:
A first thermoset resin softened in the first mold by movement of the plunger (12) of the first mold is formed between the second mold and the first mold. A molding step of molding the resin member by filling the second flow passage (100) communicating with the mold, the first flow passage, and the molding space;
After the molding step, the resin is cured in the second flow passage as compared with the mold release resistance between the thermosetting resin (71, 72, 73) cured in the second flow passage and the first mold. The second mold and the third mold so that the thermosetting resin cured in the second flow path is released from the second mold having a small release resistance between the thermosetting resin and the second mold. A first release step of moving the mold in a direction away from the first mold;
After the first release step, a second release step of moving the plunger in a direction away from the second mold so that the thermosetting resin cured in the second flow path is released from the plunger. When,
After the second mold release step, the third moves the plunger in a direction approaching the second mold so that the thermosetting resin cured in the second flow path is released from the first mold. A mold release process;
The manufacturing method of the resin member containing this. The first mold (10, 11) that can heat the thermosetting resin is softened by heating in the first mold (10, 11), and the second mold (20) has the first flow path (200) through the first flow path (200). A thermosetting resin filled in a molding space (300) formed between the third mold (30) located on the opposite side of the two molds from the first mold and the second mold. A resin member manufacturing method for forming a resin member (5) having a desired shape comprising:
A first thermoset resin softened in the first mold by movement of the plunger (12) of the first mold is formed between the second mold and the first mold. A molding step of molding the resin member by filling the second flow passage (100) communicating with the mold, the first flow passage, and the molding space;
After the molding step, the mold release resistance between the thermosetting resin (71, 72, 73) cured in the second flow path and the first mold and the mold is cured in the first mold. The mold release resistance between the thermosetting resin cured in the second flow path is smaller than the total mold release resistance between the thermosetting resin (75) and the first mold. A first moving the second mold and the third mold away from the first mold so that the thermosetting resin cured in the second flow path is released from the second mold. A mold release process;
After the first mold release step, the second mold release moves the plunger in a direction away from the second mold so that the thermosetting resin cured in the first mold releases from the plunger. Process,
After the second mold release step, the third moves the plunger in a direction approaching the second mold so that the thermosetting resin cured in the second flow path is released from the first mold. A mold release process;
The manufacturing method of the resin member containing this.   In the first mold releasing step, the distance that the second mold and the third mold move is such that the second mold and the third mold of the thermosetting resin cured in the second flow path. The method for producing a resin member according to claim 8 or 9, wherein the distance is shorter than twice the length (d7) in the moving direction of the mold.   In the third release step, the engaging member (13) that can be engaged with the thermosetting resin hardened in the second flow passage is related to the thermosetting resin hardened in the second flow passage. The second mold and the third mold are further moved away from the first mold while being combined, and the thermosetting resin (74) cured in the first flow path is removed from the second mold. The method for producing a resin member according to any one of claims 8 to 10, which is released from the mold.   The method for manufacturing a resin member according to claim 11, wherein the plunger is moved so as to follow the movement of the engagement member in the third release step.

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