JP2003039437A - Molding mold with passage for fluid for adjusting temperature and its production method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding mold with a passage for fluid for adjusting temperature which can form the fluid circuit of an optimum pattern at a low cost corresponding to a molding and a method for producing the molding mold. SOLUTION: The molding mold 10 has at least two members 20 and 30 arranged coaxially inside and outside to overlap each other and end members 40 and 50 which are arranged adjacently to both ends of the two members and joined to the end faces of the members. A channel 25 for forming fluid passage for passing fluid is formed at least in one of the outside surface of the inside member and the inside surface of the outside member. At least one of an inlet 26 and outlet 26' each communicating with the channel is formed at least in one of the end members. The members and the end members, after being bonded provisionally to each other by a pulse voltage application welding method, are heat-treated to be joined completely. At least one of molding cores 60 and 70 for partitioning the cavity of the molding mold is inserted attachably/ detachably into an axial hole formed in the inside member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die having a temperature adjusting fluid passage and a method of manufacturing the same, and more specifically, a molding die having a passage through which a heating fluid or a cooling fluid flows and a method of manufacturing the same. The present invention relates to a combination of such a mold and a mold base material that houses the mold.

A fluid passage is formed in the body of the molding die for controlling the temperature of the molding die such as a plastic molding die, a rubber molding die, a glass molding die or a die casting die, and a cooling fluid or heating is provided in the fluid passage. Flowing fluid is known in the art. In such a known molding die and manufacturing method thereof, as shown in FIG. 15, a fluid passage is formed in the main body 2 of the molding die 1 from the outer peripheral surface so as to intersect a plurality of through holes 3 with each other, and Some of the openings on the outer peripheral surface are blocked with plugs 4, and the rest are inlet port 5 and outlet port 6.
The cooling liquid or the heating liquid is caused to flow in the fluid passage defined by the plurality of through holes to adjust the temperature of the molding die 1. The fluid may be liquid or gas.

[Problems to be Solved by the Invention]

However, in such a conventional molding die,
Since the fluid passage is composed of a combination of multiple straight through holes, the shape of the fluid circuit is limited, and it is extremely difficult to form the fluid circuit with the optimum pattern according to the molded product. However, there is also a problem that the number of manufacturing steps increases and the cost increases. Further, in the conventional molding die with a fluid passage, a through hole is provided at the center of the molding die, and at least one molding core that defines the cavity of the molding die is removably inserted into the through hole. In the mold, it is difficult to form a cooling passage in itself, so that
, A plurality of through holes 3a connected to each other are linearly formed in a rectangular mold base material 7a defining a cavity Cv into which a molding die is inserted, and a part of the through holes 3a is plugged. 4a
It was closed with a passage. For this reason, it is difficult to control the heating and cooling temperature accurately by bringing the molding die close to the shape at a position near the molded product. There was a limitation.

One problem to be solved by the present invention is
A conventional molding die using a joining technique (called pulse energization joining method) to which pulse energization sintering method (pulse energization pressure sintering method) such as spark plasma sintering, spark sintering, and plasma activated sintering method is applied. It is an object of the present invention to provide a novel mold with a fluid passage for temperature control which eliminates the drawbacks of the manufacturing method and a manufacturing method thereof. Another problem to be solved by the present invention is to provide a mold with a temperature control fluid passage and a method of manufacturing the same, in which the circuit pattern of the temperature control fluid passage can be designed by expanding the degree of freedom to any pattern. is there. Another problem to be solved by the present invention is to provide a mold with a temperature control fluid passage and a method for manufacturing the same, which is capable of forming a temperature control fluid passage circuit over a plurality of layers at low cost. Still another problem to be solved by the present invention is to provide a novel combination of a mold having a temperature controlling fluid passage and a mold base material defining a cavity for accommodating such a mold. Is.

[0005]

One of the inventions of the present application is to provide a molding die having a temperature adjusting fluid passage, in which a temperature can be adjusted by flowing a fluid, with at least two members arranged substantially coaxially inside and outside. An end member that is disposed adjacent to both ends of the two members and is joined at the end faces of the members, and the fluid is provided between the outer peripheral surface of the inner member and the inner peripheral surface of the outer member. Is formed, and at least one of the end members has at least one of an inlet port and an outlet port communicating with the fluid passage, and at least the member and the end member are formed. After temporary joining by the pulse current joining method, heat treatment is performed to complete the joining, and in the shaft hole formed in the inner member, a cavity for the molding die is defined within the shaft hole. One of the molding core is constituted by removably inserted also. In one embodiment of the molding die, the facing surfaces of the members stacked inside and outside and the member and the end member may be temporarily joined by a pulse current joining method, and the shaft A hole is a through hole that penetrates in the axial direction, the molding core is composed of a plurality of core members that cooperate to define the cavity, and at least one of the core members is removably inserted into the shaft hole; Is also good. In another embodiment of the above mold, the inlet port and the outlet port are formed in one of the end members, and the passage is formed in at least one of an outer peripheral surface of the inner member and an inner peripheral surface of the outer member. Is formed by a plurality of annular grooves extending in the circumferential direction and separated in the axial direction, and the annular groove is provided on at least one of the outer peripheral surface of the inner member and the inner peripheral surface of the outer member. A first axial passage that communicates with the inlet port is formed, and at least one of an outer peripheral surface of the inner member and an inner peripheral surface of the outer member has a circumferential direction with the first axial passage. Even if a second axial passage that communicates the annular groove and the outlet port is formed at different positions, the passage is formed on at least the outer peripheral surface of the inner member and the inner peripheral surface of the outer member. Little formed on one side Both of the inner member and the outer member are formed with a first axial passage that communicates one end of the spiral groove with the inlet port. At least one of the member and the outer member is formed with a second axial passage that communicates the other end of the spiral groove with the outlet port at a position circumferentially different from the first axial passage. Alternatively, the passage is formed on at least one of the outer peripheral surface of the inner member and the inner peripheral surface of the outer member, and extends in the axial direction and is divided into a plurality of axial directions. A groove is formed, and a passage communicating with the axial groove is formed in the both end members, one of the passages can communicate with the inlet port, and the other of the passages can communicate with the outlet port. Good to have .

Another aspect of the present invention is a method for producing a molding die having a temperature controlling fluid passage capable of controlling a temperature by flowing a fluid, which has both end faces and is arranged substantially coaxially inside and outside. Preparing at least two members and two end members joined to the both end faces; forming the fluid passage between the faces facing each other when being stacked inside and outside; Forming at least one of an inlet port and an outlet port respectively communicating with the passage in at least one end member, and bringing the end surface of the member and one surface of the end member into contact with each other,
At least the end face and the face of the end member are temporarily joined by a pulse current joining method, and then heat treated to complete the joining to form a base material, and the base material is machined to insert a core member. The method includes forming an axial hole and inserting at least one core member that defines a cavity of a mold into the hole. In one embodiment of the above manufacturing method, the joint surface may be processed into a mirror surface. Further, in another embodiment, the heat treatment may be performed in a vacuum atmosphere in a temperature range of 55 to 85% of a melting temperature of the material of the block.

Another invention of the present application is a combination of a molding die having a temperature controlling fluid passage for controlling a temperature by flowing a fluid, and a mold base material defining an accommodating space for accommodating the molding die, The molding die includes at least two members that are arranged substantially coaxially inside and outside, and end members that are arranged adjacent to both ends of the two members and that are joined at the end faces of the members, A fluid passage for flowing the fluid is formed between the outer peripheral surface of the inner member and the inner peripheral surface of the outer member, and at least one of the end members communicates with the fluid passage. At least one of the inlet port and the outlet port is formed, and at least the member and the end member are provisionally joined by the pulse current joining method and then heat-treated to complete the joining, which is formed on the inner member. At least one molding core that defines a cavity of the molding die in the shaft hole is detachably inserted into the hole, and a heat insulating layer is provided between the mold base material and the molding die. It is configured. In the above combination, the heat insulating layer may be at least one of a heat insulating space layer and a heat insulating material layer.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, in FIG. 1 to FIG. 6, one embodiment of a molding die and a manufacturing method thereof according to the present invention is shown as a plastic gear molding die and a manufacturing method thereof. A plurality of (in this example, four) members divided in advance to form a fluid passage for flowing a cooling liquid such as water or oil is prepared in the molding die of this embodiment.
After forming fluid passages in one piece or two pieces, these members are joined by a joining method (pulse energization joining method) applying a pulse energization sintering method such as spark plasma sintering, spark sintering, and plasma activated sintering method. Then, it is integrated as a base material 11 for the forming die, and then the base material is subjected to a mechanic or the like and then a core member is attached to form a plastic gear forming die 10. The base material 11 for the mold is a material suitable as a material for the mold, for example, SUS420J2 (stainless steel).
And two tubular members 20 and 30 which are made of the above-mentioned material and which are arranged coaxially and overlapped with each other, and two annular end members 40 and 50 which are arranged at both ends of these members. The members 20 and 30 have the same axial length (vertical direction in FIGS. 1 and 3). One surface (upper surface in FIG. 2) 41 of the lower end member 40 (in FIG. 1) is processed into a flat surface (preferably a mirror surface). Both end surfaces 21 and 31 (upper end surface in FIG. 2) and 22 and 32 (lower end surface in FIG. 2) of the inner and outer members 20 and 30 are also processed into flat surfaces (preferably mirror surfaces). Further, the lower surface (in FIG. 2) 52 of the upper end member 50 (in FIG. 1) is also processed into a flat surface (preferably a mirror surface). Further, the surfaces of the members 20 and 30 facing each other, that is, the outer peripheral surface 24 of the member 20 and the inner peripheral surface 33 of the member 30 are also mirror-finished. The numerical range of the mirror surface is not necessarily clear, but here it means a surface-processed state having a smoothness of Ra 0.3 or less (the smaller the value, the higher the smoothness). On the outer peripheral surface 24 of the inner member 20, the annular groove 2 extending in the circumferential direction over the entire circumference.
A plurality of (5 in this embodiment) 5 are axially separated from each other. The outer diameter of the inner member 20 and the diameter (inner diameter) of the inner peripheral surface 33 of the outer member 30 are such that the member 20 fits snugly into the shaft hole of the member 30 without a gap (for example, the inner diameter of the outer member). And the dimensional difference between the outer shape of the inner member and 2
To 50 μm). The outer peripheral surface 24 of the member 20 is further provided with two diametrically spaced axial grooves 26, 26 'extending axially from one end surface (upper end surface in FIG. 2) to an annular groove 25 furthest from the end surface. Is formed. The axial grooves 26, 26 'form an axial passage. The annular groove and the axial groove may be formed by machining such as lathe processing, milling processing or the like, or may be formed by casting. In this embodiment, the diameter (inner diameter) of the inner peripheral surface 23 of the inner member 20 and the inner peripheral surface of the end members 40 and 50 (inner diameter) are formed to be the same, and the outer member 30 The diameter (outer diameter) of the outer peripheral surface 34 and the diameter (outer diameter) of the outer peripheral surfaces of the end members 40 and 50 are formed to be the same. The outer shape of the end member may be made larger than the outer shape of the outer member, and the dimensions may be adjusted later by machining if necessary. Further, the end faces of the members 20 and 30 and the faces of the end members that abut against the end faces do not necessarily need to be flat, and may be curved as long as they have the same curvature.

One end member (upper end member in FIGS. 1 and 2) 50 has one end opening to the lower surface (in FIGS. 1 and 2) 52 of the end member 50 and the other end opening to the outer peripheral surface 54. Two ports 56 and 56 'are formed. One of the ports functions as an inlet port and the other as an outlet port. The radial positions of the lower open ends of the two ports 56 and 56 'are aligned with the axial grooves 26 and 26' formed in the inner member 20 described above. Positioning holes 27 for a pair of positioning pins are formed in both end faces 21 and 22 of the member 20 so as to be separated from each other in the diametrical direction. Further, a pair of positioning holes 57 that are aligned with the positioning holes 27 are formed on the lower surface 52 of the end member 50 that contacts the end surface 21, and the end member 4 that contacts the end surface 22.
A pair of positioning holes 47 that are aligned with the positioning holes 27 are formed on the upper surface 41 of the No. 0.

Member 20 pre-machined as described above
The member 30 is attached to the outer side of the member, and the end members 40 and 50 are arranged at both ends of the members 20 and 30. And the member 20
And the end members 40 and 50 are provided with positioning holes 27, 47 and 5
Positioning is carried out by the positioning pin inserted in 7.
In this state, the lower surface side opening ends of the pair of ports 46 and 46 'formed in the end member 40 are aligned with the opening ends of the upper surfaces 21 of the axial grooves 26 and 26' formed in the member 20. Therefore, in this embodiment, the upper surface 2 of the member 20 is
1 and the upper surface 31 of the member 30 and the lower surface 42 of the end member 40 are joined to each other, and the lower surface 22 of the member 20 and the lower surface 32 of the member 30 and the upper surface 52 of the end member 50.
And become a pair of joint surfaces to be joined to each other. In this state, a pulse current welding apparatus 10 to which a pulse current sintering method such as a spark plasma sintering method is applied as shown in FIG.
It is arranged between a pair of 0 current-carrying electrodes, and the pulse current-carrying welding device joins the blocks between the pair of joining surfaces to integrate them to form the base material 11.

The pulse current joining apparatus 100 is provided with, for example, a current joining section 110 and a heat treatment section 120. The current-carrying joint part 110 is formed on the table 111 via an insulating member by a known method so as to be electrically insulated and fixed to the table, and the lower current-carrying electrode 113, which is arranged above the table 111 and is known to the table. The fixed fluid pressure cylinder 114 and the piston rod 1 of the fluid pressure cylinder 114 are connected to the tip (lower end in the figure) of the piston rod 115 via an insulating member by a known method.
15 and an upper conducting electrode 116 electrically insulated and fixed. The fluid pressure cylinder functions as a pressure device that presses the materials to be joined. As the pressurizing device, the upper energizing electrode may be moved up and down by an electric motor and a screw mechanism instead of the fluid pressure cylinder. The upper and lower energizing electrodes are electrically connected to the power supply device 117. The power supply device can supply a DC pulse current. Power supply 11
Reference numeral 7 has a built-in switch mechanism (not shown) for electrically connecting and disconnecting the power source and the energizing electrode. The power that can be supplied by the power supply device is a high-current power having a voltage of 100 V or less and a current of 2000 to 8000 A, for example. In the above example, the lower energizing electrode is fixed and the upper energizing electrode is moved, but the opposite may be done, or both may be moved. The heat treatment unit 120 may be a vacuum heat treatment furnace having a known structure capable of heat treatment in a vacuum atmosphere or a gas atmosphere furnace capable of heat treatment in an inert gas atmosphere. Also, the pulse current welding device 1
10 and the heat treatment unit 120 are integrally structured and a product transfer robot device is arranged between them, and a structure is adopted in which a plurality of temporarily joined base materials are collectively heat treated, or they are separately arranged. You may. In the above embodiment, the upper energizing electrode is fixed by, for example, a plurality of columns (not shown), a pressurizing device such as a fluid pressure cylinder is arranged on the base 111, and the lower energizing electrode is used by the pressurizing device. You may make it move up and down.

A plurality of members 20, 30, 40 and 50, which are superposed and positioned on each other, are connected to the joining device 10 described above.
After being set between the pair of current-carrying electrodes 113 and 116 of 0, the volume and cross-sectional area of the article to be bonded are pressurized with a predetermined pressure by a pressure device, for example, a pressure in the range of 0 to 50 megapascals. When a direct current pulse current of a predetermined current is passed between the energized electrodes at a predetermined voltage according to the material, shape, size, etc.,
The contact interface portion with high contact resistance is heated to a high temperature by Joule heating. Further, the entire material is Joule heated by the resistance value of the material itself. Further, a high pressure is generated at the contact interface of the members that are stacked inside and outside due to the plastic deformation and the thermal expansion due to the vertical uniaxial pressure. Further, an electric field is generated along the direction of the flow of the on-off pulse current, and electric field diffusion occurs. It is considered that this electric field diffusion effect and the mechanical pressure of the above-mentioned thermal diffusion contribute to the solid-phase diffusion bonding to obtain the orientation of the metal crystal structure. For this reason, these members are provided between the joining surfaces of the pair, that is, between the abutting contact surfaces of the members 20 and 30, and between the members 20 and 3.
The upper surfaces 21 and 31 of 0 and the lower surface 52 of the member 50, and the lower surfaces 22 and 32 and the upper surface 41 of the member 40 are joined to each other. It is known from the joining experiment result that this joining has a higher densification rate than the conventional hot press sintering method.
As a result, the junction between adjacent blocks in this state is not perfect in terms of energy quantity because the diffusion layer is shallow and in terms of junction strength, but the arrangement state of the metal lattice at the junction interface is more diffuse. It is considered that they are aligned in an easy direction. Therefore, this joined state is called temporary joining, and the temporarily joined member is called a temporary joined body. The temporary bonded body constituted by the temporarily bonded members 20, 30, 40 and 50 is then subjected to the heat treatment section 120.
The heat treatment is performed in the heat treatment furnace. Since the temporary joining process and the heat treatment are performed as described above, the method is referred to as a two-step process here. Although the heat treatment temperature and time differ depending on the material and size of the member, the heat treatment temperature and time are greatly reduced to 1/10 to 1/20 as compared with the time required for solid phase diffusion bonding only by conventional heat treatment. By performing this heat treatment, the joining between the joining surfaces, which were temporarily joined, becomes complete in a short time due to the high time of the densification diffusion rate, and becomes a complete joined body.
The joining strength of the joined body has a value comparable to the strength of the material of the member. This completes the manufacture of the base material 11. The pressure applied by the pulse current welding, the voltage and current of the pulse current, the heat treatment temperature and time, etc. differ depending on the material and size of the block, but as the material of the member, SUS420J
2, the inner diameter of the member 20 is 40 mm, the outer diameter is 70 m
m, the inner diameter of the member 30 is 70 mm, the outer diameter is 110 mm, and the axial length of both is 30 mm.
The inner diameter of 0 and 50 is 40 mm, the outer diameter is 110 mm,
Further, the thickness of the end members 40 and 50 is 5 mm and 2 respectively.
When the pressure is 5 mm, the pressure is 30 MPa, the voltage is 3 to 10 V, the current value is 5000 to 6000 amps, and the vacuum heat treatment temperature and time are 950 to 1100 ° C. and 60 to 120 minutes, respectively. To obtain In addition, at the time of heating, the member 20
When the outer peripheral surface of the member tries to expand outward from the central axis, the member 3
The outer circumference with 0 expands outward from the central axis, and the inner peripheral surface tries to expand in the central axis direction. As a result, the member 20 becomes the member 3
Even if they are not fitted into each other by means of an interference fit, the clearance ring between the contact surfaces of the two becomes smaller. Further, since the member 30 is first cooled during cooling and the member 20 is further tightened due to contraction, the state is the same as the state in which pressure is applied from the outside during energization joining, and the joining is more complete. The inner peripheral surface of the member 30 may expand outward depending on the shape, but the wall thicknesses of both members are set so that the difference from the outer thermal expansion of the outer peripheral surface of the member 20 acts in the direction of reducing the gap. It is preferable to make the gap range and the wall thickness of the member that eliminate the gap due to thermal expansion and contraction.

The base material 11 for the molding tool thus produced is provided with a temperature control fluid defined by a plurality of annular grooves 25 and axial grooves 26, 26 'formed in the member 20. A flowing fluid passage is formed. And one port 46 communicating with the axial groove 26 is used as an inlet port,
When the port 46 'communicating with the axial groove 26' is used as an outlet port, the fluid flows from the axial groove 26 in the plurality of annular grooves 25 in parallel, and the fluid flows through the axial groove 26 'through the outlet port 46'.
Drained from. In addition, since the mirror surfaces are preliminarily processed between the pair of joint surfaces, a tight joint is performed, and the fluid does not flow out from the fluid passage through the joint surfaces. In the subsequent machining process, the base material 11 has a central portion (a position radially inward of the circular groove that does not interfere with the groove) shown in FIG.
A through hole 12 is formed as shown in FIG. 1 and is built up in the main body 11 'of the mold. In this embodiment, the through hole 12 includes a portion 13 having a circular cross section with a diameter D1 and a diameter D2.
A portion 14 having a circular cross section (D2> D1) and a portion 13
There is a part 15 in the middle of which is provided with a large number of irregularities in the form of splines in the middle. The unevenness formed on the inner circumference of the portion 15 is a portion for forming a plurality of teeth of the plastic gear that is a molded product, and therefore is formed according to the shape and size of the plastic gear. When a tubular member is used as the inner member 20 and an annular member is used as the end member as in the above embodiment,
It is necessary to use materials whose inner diameters are smaller than the smallest diameter of the part processed as described above. By using a tubular member and an annular end member in advance, it is possible to reduce the time and effort for the machining as described above, but a solid cylindrical body is used as the member 20 and a disc-shaped member is used as the end member. May be. In addition, when the teeth of the plastic gear are helical gears instead of straight tooth gears, it goes without saying that the concavities and convexities formed in the portion 15 have a shape corresponding to the helical gear.

On the other hand, the core member defining the cavity (cavity into which the plastic material is poured) necessary for molding the plastic in the through hole is manufactured by another manufacturing process. The core member of this embodiment is composed of two core members 60 and 70 shown in FIGS. One core member 60
Has a large-diameter portion 63 having an outer diameter closely fitted to the diameter D1 portion of the through hole 12 formed in the body 11 ', and an annular portion in cooperation with the portion 15 of the body 11 in the through hole 12. A small diameter portion 64 having a diameter d1 that defines a cavity is formed. The axis O-O of the core member 60 has one surface (see FIG. 4).
Is the upper surface and is the inner surface of the through hole 12 of the main body) 6
A stepped core hole 65 penetrating from 1 to the other surface 62 is formed. A circular recess 6 having a diameter d2 is formed at the center of the surface 61.
6 is formed. Further, the core member 60 has an axis O-
A plurality of through holes 67 and 68 are formed at positions on the circumference of O with radii r1 and r2 and are circumferentially separated. Extrusion pins 82 for extruding a molded product are provided in these through holes.
83 is inserted. The other core member 70 is the main body 11
A large-diameter portion 73 having an outer diameter closely fitted in a portion of the through hole 12 having a diameter D2 formed therein, and a diameter d1 that cooperates with the main body 11 in the through hole 12 to define an annular cavity. A small diameter portion 74 is formed. Further, the core member 70 is provided with a molding material injection port 75 penetrating from one surface (the upper surface in FIG. 5, which is the inner surface of the through hole 12 of the main body) 71 to the other surface 72. A circular recess 76 having a diameter d2 is formed at the center of the surface 71. The core members 60 and 70 as described above may be used as shown in FIG.
The molding die 10 is made by inserting the shaft 81 into the through hole 12 of 1 '. The through hole portion 14 may be a tapered hole that widens toward the outside of the main body. In that case, the outer periphery of the portion 73 of the core member 70 is also tapered.

In the above embodiment, the annular groove 25 is formed in the outer peripheral surface 24 of the inner member 20 of the two members arranged inside and outside to form the fluid passage. An annular groove is formed on the peripheral surface 33 to form a fluid passage, or (2) an annular groove that is aligned with the outer peripheral surface of the member 20 and an inner peripheral surface of the member 30 is formed, and the fluid passage is formed by these annular grooves. May be configured. In the case of (1), the axial groove is formed on the inner peripheral surface 33 of the member 30, and in the case of (2), the axial groove is formed on both the outer peripheral surface of the member 20 and the inner peripheral surface of the member 30. Is preferred. Further, the circumferentially extending groove is not an annular groove but a spiral groove 2 formed on the outer peripheral surface 24a of the inner member 20a as shown in FIG.
5a or the spiral groove 35b formed on the inner peripheral surface 33b of the outer member 30b, and one end of the spiral groove (upper end in FIG. 8)
The end members 50a, 5 through the axial passages 26a, 26b.
0b, one of the ports 56a, 56b is connected to the other end (lower end in FIG. 8) of the axial passages 26a ', 26b.
It may be connected to the other port 56a ', 56b' via b '. Further, the spiral groove may be formed in plural lines instead of one line so that the fluids can flow separately. Furthermore, a fluid passage formed between two members that are arranged inside and outside is
As shown in FIG. 9, the outer periphery 24c of the inner member 20c
A plurality of axial grooves 25c extending in the axial direction over the entire length
May be formed so as to be separated in the circumferential direction like a spline, and may be constituted by the axial groove. of course,
Although not shown, the axial groove may be formed on the inner peripheral surface of the outer member to form the fluid passage. When the fluid passage is formed by the axial passage, as shown in FIG. 10, the upper surface 41c of the end member 40c and the end member 50c are formed.
The lower surface 52c of each of the circular holes 47c and 57c, which communicate with the axial grooves, are provided, the groove 57c is connected to the port 56c, and the groove 47c is formed in the inner member 20c.
It may be connected to another port 57c 'via 6c.

The molding die 10 manufactured as described above is inserted into a cavity for mounting the die base material. In this case, as shown in FIG. 11, the die base material 200 is vertically penetrated. In the hollow 201, a heat insulating space Ic is formed between the outer circumference of the member 30d on the outer side of the molding die 10d and the inner circumference of the hollow. For this reason, like the molding die 10d, the inner diameter of the cavity 201 is made larger than the outer diameter of the member 30d so that a heat insulating space is formed between them, and at the same time, the end member 40 is formed.
The outer diameters of d and 50d are set to fit within the cavity (for example, the dimensional difference between the inner diameter of the outer member and the outer shape of the inner member is 2 to 50 μm). Instead of increasing the outer diameter of the end member, the end member having the same outer diameter as the outer diameter of the member 30d may be fitted with a ring made of a heat insulating material to perform heat insulation. Also,
As shown in FIG. 12, the sleeve 80 is fitted to the outside of the end members 40e and 50e of the molding die 10e having the increased outer diameter, and fixed by welding or the like.
Vacuum cavity Vc held in a vacuum state (negative pressure state) between
May be provided, thereby enhancing the heat insulating effect. Reference numeral 81 is a reinforcing rib. Further, as shown in FIG. 13, the outer diameter of the end members 40f and 50f of the molding die 10f is made larger than the outer diameter of the member 30f, and the heat insulating sleeve 85 is fixed to the outer side of the end member to form a heat insulating sleeve. A mold may be inserted. As described above, by forming the heat insulating layer by at least one of the heat insulating space and the heat insulating material between the molding die and the die base material, the temperature control of the molding die can be performed more easily and efficiently, and at a high temperature. Molding with a resin material (for example, 300 ° C. or higher) that requires molding is possible.

In FIG. 14, yet another embodiment of the mold of the present application is shown. In the previous embodiment, the example in which there are two members that are stacked inside and outside is shown, but in this embodiment, 3
The individual regions are heated or cooled to control the temperature. In the figure, another tubular member 90g is disposed between the two tubular members 20g and 30g that are coaxially stacked inside and outside. The members have the same axial length and end members 40g at both ends.
And 50 g are arranged. In addition, in FIG.
The description of the same parts as those of the embodiment of FIG. 6 will be omitted. The outer peripheral surface 24g of the member 20g is formed with a plurality of (six in this embodiment) annular grooves 25g that extend in the circumferential direction over the entire circumference and are separated in the axial direction. The outer peripheral surface 24g of the member 20g further has one end surface (upper end surface in FIG. 2).
Two axial grooves 26 extending axially from one end face to the other end face
g and 26g 'are formed so as to be separated in the diametrical direction. The axial grooves 26g and 26g 'form an axial passage. The outer peripheral surface 94g of the member 90g is formed with a plurality of (three in this embodiment) annular grooves 95g that extend in the circumferential direction over the entire circumference in the axial center portion of the member 90g so as to be separated in the axial direction. The outer peripheral surface 94g of the member 90g further includes an axial groove 96g extending axially from one end surface (upper end surface in FIG. 14) to an annular groove 95g furthest from the end surface, and the other end surface (upper end in FIG. 14). An axial groove 96g 'extending in the axial direction from the end surface) to an annular groove 95g furthest from the end surface is formed at a diametrical distance. Axial groove 96g, 96
g'defines an axial passage. When the axial grooves 26g, 26g 'formed in the member 2 and the axial grooves 96g, 96g' formed in the member 90 are integrally joined with the members 20, 90, 30 and the end members 40, 50. Causes the axial grooves 26g, 26g 'and 96g, 96g' to be circumferentially offset by 90 degrees.

One end member (upper end member in FIGS. 1 and 2) 50g has two pairs of ports 56g and 56g ', one end of which opens on the lower surface 52g of the end member 50g and the other end of which opens on the outer peripheral surface 54. 59g and 59g 'are formed. One of the ports functions as an inlet port and the other as an outlet port. Two ports 56g and 56
It is formed diametrically (180 ° in the circumferential direction) apart from each other, and similarly, the two ports 59g and 59g 'are also formed diametrically apart from each other. The radial position of the open end on the lower surface side of the port 56g is a position aligned with the axial groove 26 formed in the inner member 20 as shown in FIG. 14B, and the port 56g ' The radial position of the open end on the lower surface side of the passage 36g 'is formed so as to penetrate the member 30 in the axial direction and communicates with the other axial groove 26g' through the groove 46g formed in the end member. It is a position that matches with. The radial position of the opening end on the lower surface side of the port 59g is a position aligned with the axial groove 96g formed in the inner member 90g as shown in FIG. 14B, and the port 59g ' The radial position of the opening end on the lower surface side of the passage 39g 'which is formed so as to penetrate the member 30 in the axial direction and communicates with the other axial groove 59g' through the groove 49g formed in the end member. It is a position that matches with. By providing the three tubular members in this way, two different fluid passages are provided, and by making the positions different, the heating and cooling ranges can be adjusted. In the above embodiment, at least one of the outer peripheral surface of the inner member and the inner peripheral surface of the outer member, further, an example of forming a groove on at least one of the inner peripheral surface and the outer peripheral surface of the intermediate member, No grooves are formed on the inner and outer peripheral surfaces of the members, and a gap is provided between the surfaces of the members that are stacked inside and outside to allow the fluid to flow (thus, the members that are stacked inside and outside are not joined). Alternatively, a temperature adjusting fluid may be flowed there.

[0019]

[Effect] According to the present invention, the following effects can be obtained. (A) A joining method in which a groove for defining a fluid passage is formed on the outer periphery of a cylindrical member or a columnar member or the inner periphery of a cylindrical member, and the pulse energization sintering method is applied to the member (pulse energization joining method). )
Since it is joined by the conventional brazing method and welding method, it is possible to join a large area of the joining interface over the entire area with no gaps and with a high quality without leaks. The circuit pattern of the temperature control fluid passage can be accurately formed inside the mold, and the temperature control efficiency of the mold can be improved. (B) Since the block having the groove defining the fluid passage on the surface is joined by the joining method applying the pulse current sintering method, the conventional method of providing the O-ring groove and sealing between the blocks with the O-ring is used. It is not necessary, you can easily create the circuit pattern of the desired fluid passage, and you can design a structure that is almost approximate to the result of the heat distribution simulation by the finite element method based on the thermal conductivity. It has a cooling and heating structure and can reduce the manufacturing cost. (C) Since a plurality of fluid passages can be defined, it is possible to partially control the temperature and improve the quality of the molded product. (D) By the same idea, a fluid passage can be defined inside the convex mold, and more detailed temperature control can be performed. (E) The temperature of the molding die can be controlled easily and more precisely.

[Brief description of drawings]

FIG. 1 is a perspective view of a base material used in an embodiment of a mold with a temperature control passage according to the present invention.

2 is a perspective view showing each member of the molding die of FIG. 1 in an exploded state, and is a view showing an arrangement relationship of grooves, positioning holes and the like formed in each member. FIG.

FIG. 3 is a cross-sectional view of a main body of a mold made by machining the base material of FIG.

4 is a perspective view of one core member inserted into the main body of FIG. 3. FIG.

FIG. 5 is a perspective view of the other core member inserted into the main body of FIG. .

FIG. 6 is a cross-sectional view of a molding die.

FIG. 7 is a diagram showing a schematic configuration of a pulse current joining device.

FIG. 8 is a cross-sectional view showing a modified example of the groove formed in the member.

FIG. 9 is a cross-sectional view showing another modified example of the groove formed in the member.

10 is a cross-sectional view illustrating a method of connecting the groove and the port in the base material having the groove of FIG.

FIG. 11 is a diagram illustrating a mounting state of a molding die in a cavity of a die base material.

FIG. 12 is a diagram illustrating another mounting state of the mold base material in the cavity of the molding die.

FIG. 13 is a view for explaining still another mounting state of the molding die into the cavity of the die base material.

FIG. 14 is a sectional view of still another embodiment of the molding die of the present invention.

FIG. 15 is a view showing an example of a conventional mold with a fluid passage.

FIG. 16 is a diagram showing an example of a conventional die base material with a fluid passage.

[Explanation of symbols]

10, 10a, 10d, 10e, 10f Molds 11, 11a, 11b, 11c, 11g Base material 12 Through holes 20, 20a, 20b, 20c Members 30, 30a, 30b, 30c, 30d, 30e, 30
f, members 40, 40a, 40b, 40c, 40d, 40e, 40
f, end members 50, 50a, 50b, 50c, 50d, 50e, 50
f, member 24, 24a, 24b, 24c outer circumference 25, 25a, 25c groove 35b groove 56, 56 ', 56a, 56a', 56b, 56b ',
56c, 56c 'port 60, 70 core member 90g member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masao Tokita             Sumitomo Stone, 3-20-4, Nishishimbashi, Minato-ku, Tokyo             Coal Mining Co., Ltd. (72) Inventor Hitoshi Karasawa             4750 Nakasu, Suwa City, Nagano Prefecture 11 Suwa Heat             Industry Co., Ltd. (72) Inventor Fumitake Nishiyama             4750 Nakasu, Suwa City, Nagano Prefecture 11 Suwa Heat             Industry Co., Ltd. F term (reference) 4F202 CA30 CK42 CN01 CN05 CN14                       CN21

Claims (12)

[Claims] 1. A molding die having a temperature-adjusting fluid passage capable of flowing a fluid to adjust the temperature, wherein at least two members are arranged substantially coaxially inside and outside and adjacent to both ends of the two members. An end member that is arranged and joined at the end surface of the member, and a fluid passage for flowing the fluid is formed between the outer peripheral surface of the inner member and the inner peripheral surface of the outer member, At least one of the inlet port and the outlet port, which communicates with the fluid passage, is formed in at least one of the end members, and at least the member and the end member are temporarily joined by a pulse current joining method and then heat treated. And the joining is completed, and at least one molding core defining a mold cavity in the shaft hole is detachably inserted into the shaft hole formed in the inner member. Mold with temperature control fluid passage. 2. The mold with temperature control fluid passage according to claim 1, wherein the facing surfaces of the members stacked inside and outside and the member and the end member are temporarily bonded by a pulse current bonding method. Molds with temperature control channels. 3. The mold with temperature control fluid passage according to claim 1, wherein the shaft hole is a through hole that penetrates in the axial direction, and the molding core cooperates to define the cavity. A mold comprising a plurality of core members, and at least one of the core members being removably inserted into the shaft hole. 4. The mold with temperature control fluid passage according to claim 1, 2 or 3, wherein the inlet port and the outlet port are formed in one of the end members, and the passage is formed in the inner member. The outer peripheral surface and the inner peripheral surface of the outer member are formed on at least one of the outer peripheral surface, and the outer peripheral surface of the inner member and the outer surface are formed by a plurality of annular grooves extending in the circumferential direction and separated in the axial direction. A first axial passage that communicates the annular groove with the inlet port is formed on at least one of the inner peripheral surfaces of the inner member, and at least the outer peripheral surface of the inner member and the inner peripheral surface of the outer member. A molding die having a second axial passage that communicates the annular groove and the outlet port with each other at a position circumferentially different from the first axial passage. 5. The mold with temperature control fluid passage according to claim 1, 2 or 3, wherein the passage is formed on at least one of an outer peripheral surface of the inner member and an inner peripheral surface of the outer member. A first axial passage that connects one end of the spiral groove and the inlet port is formed in at least one of the inner member and the outer member. A second axial passage that connects the other end of the spiral groove and the outlet port is formed in at least one of the inner member and the outer member at a position that is circumferentially different from the first axial passage. Mold that is used. 6. The mold with temperature control fluid passage according to claim 1, 2 or 3, wherein the passage is formed on at least one of an outer peripheral surface of the inner member and an inner peripheral surface of the outer member. A plurality of axial grooves extending in the axial direction and circumferentially separated from each other, a passage communicating with the axial groove is formed in the both end members, and one of the passages and the inlet port are formed. A mold capable of communicating with the other of the passages and the outlet port. 7. A method of manufacturing a mold having a temperature-adjusting fluid passage capable of adjusting a temperature by flowing a fluid, comprising: at least two members having both end faces and arranged substantially coaxially inside and outside. Preparing two end members to be joined to the both end surfaces; forming the fluid passage between the surfaces facing each other when stacked inside and outside, and at least one end member of the end members Forming at least one of an inlet port and an outlet port respectively communicating with the passage, and bringing the end face of the member and one face of the end member into contact with each other, and at least the end face and the end member of the end member. The surface is temporarily joined by a pulse current joining method, and then heat treatment is performed to complete the joining to form a base material, and the base material is machined to form a shaft hole for inserting a core member. When, a method of manufacturing the mold comprising, and inserting at least one core member mold cavity image Narusuru in the bore. 8. The method for manufacturing a mold with a fluid passage for temperature control according to claim 6, wherein the end face and the face of the end member and the facing faces of the members laminated inside and outside are pulsed. A manufacturing method in which temporary joining is performed by a current joining method. 9. The method of manufacturing a mold with a fluid passage for temperature control according to claim 7 or 8, wherein the facing surface of the member and the end surface of the member and the surface of the end member are mirror-finished. Mold manufacturing method. 10. The method of manufacturing a mold with a temperature controlling fluid passage according to claim 6, 7 or 8, wherein the heat treatment is performed in a desired atmosphere at 55 to 85% of a melting temperature of a material of the block. A method for manufacturing a molding die in a temperature range. 11. A combination of a molding die having a temperature-adjusting fluid passage capable of flowing a fluid to regulate the temperature, and a mold base material defining an accommodation space for accommodating the molding die, wherein the molding die comprises: An outer periphery of an inner member, which includes at least two members that are arranged substantially coaxially inside and outside and are overlapped with each other, and end members that are arranged adjacent to both ends of the two members and joined at end faces of the members. A fluid passage for flowing the fluid is formed between the surface and the inner peripheral surface of the outer member, and at least one of the end members has an inlet port and an outlet port that communicate with the fluid passage. At least one of which is formed, and at least the member and the end member are provisionally joined by a pulse current joining method and then heat-treated to complete the joining, and in the shaft hole formed in the inner member, At least one molding core that defines a cavity of the molding die is detachably inserted in the axial hole, and a heat insulating layer is provided between the mold base material and the molding die. A combination of a mold with a temperature control fluid passage and a mold base material. 12. The combination according to claim 11, wherein the heat insulating layer is at least one of a layer of a heat insulating space and a layer of a heat insulating material.