Spacer member for hot runner molding, and molding apparatus

Abstract

To provide a spacer member for hot runner molding which has a high heat blocking effect between a stationary mold and a manifold, and which has high strength, and low risk of damage or the like, and to provide a molding apparatus having the spacer member.SOLUTION: A spacer member 30 for hot runner molding inserted between a stationary mold 3 and a manifold 12 has a metal member 31 and an insulation member 32. The metal member 31 has a columnar shape. A first bottom surface 31a comes into contact with the stationary mold 3, a second bottom surface 31b comes into contact with the insulation member 32, and a first through hole 31c is formed to communicate both bottom surfaces. The insulation member 32 has a columnar shape. Its external shape is approximately the same as that of the metal member 31. A third bottom surfaces 32a comes into contact with the metal member 31, a fourth bottom surface 32b comes into contact with the manifold 12, and a second through hole 32c is formed to communicate both bottom surfaces. A heat from the manifold 12 is transferred via the insulation member 32 and the metal member 31 to the stationary mold 3.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a spacer member for hot runner molding and a molding apparatus. [Background technology]

[0002] Plastic injection molding technology is used in a variety of industrial fields as a means of manufacturing and shaping products and parts, and is expanding into fields that require high precision. In such injection molding, molds play an important role along with molding machines.

[0003] In recent years, various attempts have been made in the field of injection molding to make more efficient use of resources, such as resource conservation and recycling. Among these, the hot runner (runnerless) molding method, which maintains the resin in the runner at a viscosity that allows it to be injected, has become widely adopted.

[0004] Conventionally, in hot runner molding, the position of the manifold relative to the fixed mold is maintained by a riser pad (see, for example, Patent Document 1). Molten resin, which serves as the molding material, passes through the manifold. Therefore, the manifold needs to be temperature-controlled at a high temperature, and it is desirable to thermally insulate the manifold and the fixed mold as much as possible. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-230370 Summary of the Invention [Problem to be solved by the invention]

[0006] However, conventional riser pads are often made of metal, and because metal has high thermal conductivity, it is not effective in insulating heat between the fixed mold and the manifold. Furthermore, when materials such as ceramic or zirconia are used as disclosed in Patent Document 1, there is a risk of damage such as chipping or cracking occurring when mounting with bolts or the like.

[0007] The present invention has been made in view of the above circumstances, and an exemplary object of the present invention is to provide a spacer member for hot runner molding that has a high thermal insulation effect between the fixed mold and the manifold, is strong, and has little risk of breakage, and a molding apparatus having the spacer member. [Means for solving the problem]

[0008] In order to solve the above problems, a spacer member for hot runner molding as an exemplary aspect of the present invention has the following configuration.

[0009] A spacer member for hot runner molding that is inserted between a fixed mold and a manifold and is arranged in contact with the fixed mold and the manifold, the spacer member has a first member made of metal and a second member made of a heat insulating material; the first member has a cylindrical or polygonal prism shape having a first height, one of both bottom surfaces of which contacts the fixed mold and the other of which contacts the second member, and a first through hole is formed in the approximate center of the first member and communicates with both bottom surfaces of the first member; the second member has a cylindrical or polygonal prism shape having a second height, one of both bottom surfaces of which contacts the first member and the other of which contacts the manifold, and a second through-hole is formed in the approximate center of the second member and communicates with both bottom surfaces of the second member; A spacer member for hot runner molding configured to transfer heat from the manifold to the fixed mold through the second member and the first member.

[0010] A molding apparatus according to another exemplary aspect of the present invention has the following configuration.

[0011] The fixed mold; the manifold; The spacer member for hot runner molding according to claim 1; a movable mold disposed opposite the fixed mold and clamped to the fixed mold; a press device for clamping the fixed mold and the movable mold together.

[0012] Further objects and other features of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a spacer member for hot runner molding that has a high thermal insulation effect between the fixed mold and the manifold, is strong, and has little risk of breakage, and a molding apparatus having the spacer member. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an overall configuration diagram of an injection molding machine according to a first embodiment of the present invention. [Figure 2] 1A and 1B are explanatory views of a spacer member according to a first embodiment of the present invention, in which FIG. 1A is a vertical cross-sectional view of the spacer member, and FIG. 1B is a plan view of the spacer member. [Figure 3] 10 is a vertical cross section of a spacer member according to a second embodiment of the present invention. [Figure 4] 10 is a vertical cross section of a spacer member according to a third embodiment of the present invention. [Figure 5] 10 is a vertical cross section of a spacer member according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] [Embodiment 1] <Injection molding machine 1> Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a diagram showing the overall configuration of an injection molding machine (molding apparatus) 1 according to the first embodiment. The injection molding machine 1 is a molding apparatus for performing hot runner molding (also called hot runner molding or runnerless molding).

[0016] Injection molding machine 1 has a press device 2 and is configured to be able to attach a fixed mold (hot runner molding mold) 3 and a movable mold 4. In this embodiment 1, injection molding machine 1 has a manifold 12 and a spacer member 30, which will be described later, in addition to the press device 2, fixed mold 3, and movable mold 4. It should be noted that the molding apparatus of the present invention is not necessarily limited to injection molding machines for runnerless molding. The present invention is preferably applied to a hot runner type molding apparatus, but can of course also be applied to molding apparatuses other than the hot runner type.

[0017] <Fixed mold 3> The fixed mold 3 is clamped together with the movable mold 4 to form a cavity 10 for a resin molded product. The fixed mold 3 is the side that is not moved by the press device 2, that is, the mold that does not move when the press device 2 clamps the mold. A spacer member 30 is held between the fixed mold 3 and the manifold 12.

[0018] 1, a bushing 1b is provided in the fixed mold 3. The bushing 1b is connectable to a dispenser (supply device) 5 and is adapted to receive a resin material 6 supplied from a resin material tank (not shown) through a nozzle 1a of the dispenser 5. The bushing 1b has a through-hole and communicates with a resin flow path 22 of the manifold 12, and is adapted to send the resin material 6 supplied from the dispenser 5 toward the resin flow path 22.

[0019] The resin material 6 that has flowed inside the resin flow path 22 is injected (discharged) through a gate (injection port) 21 into a space 10 defined by the fixed mold 3 and the movable mold 4. In this specification, since injection molding is described, the terms discharge and injection are used as substantially the same meaning.

[0020] <Movable mold 4> The movable mold 4 can be moved relative to the fixed mold 3 by the press device 2. With the movable mold 4 moved so that it is in close contact with the fixed mold 3 and clamped, a resin material 6 is injected into a gap (inside the mold) 10 formed between the two molds, and a resin molded product is produced according to the shape of the gap 10. The press device 2 is composed of an actuator such as a hydraulic cylinder or a servo motor, and clamps the molds with a press pressure of several 10 to several 100 tons.

[0021] The other components of the injection molding machine, such as the resin material tank, are well known and therefore will not be illustrated or described here. The hot runner resin molding process is also well known and therefore will not be described here in detail.

[0022] <Manifold 12> The manifold 12 defines a resin flow path 22 therein, and guides the resin material 6 flowing in the resin flow path 22 to the gate 21. In the hot runner molding process using the injection molding machine 1, it is necessary to maintain the resin material 6 in the resin flow path 22 at a high temperature. For this reason, the manifold 12 is heated by a heater (not shown).

[0023] The manifold 12 is positioned and held relative to the fixed mold by a spacer member 30. The gap between the fixed mold 3 and the manifold 12 is approximately the same as the height dimension of the spacer member 30 (of the cylindrical or polygonal prism shape). When the manifold is heated, it thermally expands, narrowing the gap with the fixed mold 3. This increases the stress applied to the spacer member 30, and the manifold 12 is firmly positioned and held relative to the fixed mold 3.

[0024] In order to reduce the temperature change of the resin material 6 and to maintain the stress applied to the spacer member 30, it is necessary to reduce the heat transfer from the manifold 12 to the fixed mold 3 as much as possible. Therefore, the spacer member 30 is expected to exhibit a heat insulating effect between the fixed mold 3 and the manifold 12. The spacer member 30 of the present embodiment 1 exhibits a high heat insulating effect while preventing damage and the like when attached to the manifold 12.

[0025] <Spacer member 30> FIG. 2 is an explanatory diagram of the spacer member 30 of the first embodiment. FIG. 2(a) is a longitudinal cross-sectional view of the spacer member 30 (a cross-sectional view cut along the cylindrical axis direction), and FIG. 2(b) is a plan view of the spacer member 30. The spacer member 30 is attached to the manifold 12 when in use, and positions and holds the manifold 12 relative to the fixed mold 3. The spacer member 30 is called a riser pad. The spacer member 30 is a component for hot runner molding, and is inserted between the fixed mold 3 and the manifold 12, and is arranged in contact with the fixed mold 3 and the manifold 12. Because the spacer member 30 is a component that comes into contact with the manifold 12 and the fixed mold 3, it is necessary for the spacer member 30 to exhibit a high heat insulating effect so as to minimize the transfer of heat from the manifold 12 to the fixed mold 3 side.

[0026] 1, the spacer member 30 can be placed at an appropriate position between the manifold 12 and the fixed mold 3. For example, as shown in Fig. 1, the spacer member 30 can be placed at a position (position A) near the end of the manifold 12, a position (position B) near the valve pin 23 that opens and closes the gate 21, or a position (position C) near the center of the manifold 12 and near the shaft 24 that is arranged to position the fixed mold 3 and the manifold 12. The spacer member 30 has a metal member (first member) 31 and a heat insulating member (second member) 32.

[0027] <Metallic member 31> The metal member 31 has a substantially cylindrical or polygonal prism shape and has a predetermined height (first height) H1 in the height direction. In the first embodiment, the metal member 31 has a cylindrical outer shape together with the heat insulating member 32 described below. Any suitable metal material can be selected as the material for the metal member 31. For example, high-strength metal materials such as iron, stainless steel, and titanium can be selected as the material for the metal member 31.

[0028] The metal member 31 has a cylindrical shape and has bottom surfaces at both ends. One of the bottom surfaces is a first bottom surface 31a, which contacts the fixed mold 3. The other of the bottom surfaces is a second bottom surface 31b, which contacts the heat insulating member 32. A first through hole 31c is formed in approximately the center of the metal member 31, communicating with both bottom surfaces 31a, 31b. In the first embodiment, the first through hole 31c is a stepped through hole, and has a stepped portion 31d midway.

[0029] 2(b), the metal member 31 may have a honeycomb structure 31e extending along the axial direction of the cylinder. By having the honeycomb structure 31e in the metal member 31, the buckling strength of the metal member 31 in the axial direction is increased, and the metal member 31 is prevented from buckling even when the mold is clamped during resin molding.

[0030] Furthermore, since the metal member 31 has the honeycomb structure 31e, the contact areas of the bottom surfaces 31a and 31b of the metal member 31 with the fixed mold 3 and the heat insulating member 32 can be reduced. This reduces heat conduction between the heat insulating member 32 and the fixed mold 3 via the metal member 31. In other words, the adoption of the honeycomb structure 31e can improve the heat insulating effect of the spacer member 30.

[0031] <Thermal insulation member 32> The heat insulating member 32 is roughly cylindrical or polygonal prism-shaped and has a predetermined height (second height) H2 in the height direction. It is preferable that the metal member 31 and the heat insulating member 32 have roughly the same outer shape. That is, if the metal member 31 is cylindrical, it is preferable that the heat insulating member 32 is also cylindrical and has roughly the same diameter. If the metal member 31 is rectangular or hexagonal prism-shaped, it is preferable that the heat insulating member 32 is also rectangular or hexagonal prism-shaped and has roughly the same dimensions.

[0032] Of course, the outer shape of the metal member 31 and the outer shape of the heat insulating member 32 do not necessarily have to match. Two identical cylindrical shapes or two identical polygonal prism shapes may have different radii or circumferential dimensions, or one of the metal member 31 and the heat insulating member 32 may be a different columnar shape (for example, one may be a cylindrical shape and the other a polygonal prism shape).

[0033] Any suitable material with high thermal insulation properties (i.e., low thermal conductivity) can be selected as the material for the heat insulating member 32. For example, non-metallic materials such as glass epoxy laminated board and ceramic can be selected as the material for the heat insulating member 32. It is also possible to select resin, glass fiber reinforced resin, carbon fiber reinforced resin, silicone resin, rubber, wood, etc. as the material for the heat insulating member 32.

[0034] In the first embodiment, the heat insulating member 32 has a cylindrical shape and has bottom surfaces at both ends. One of the bottom surfaces is a third bottom surface 32a, which contacts the metal member 31. The other of the bottom surfaces is a fourth bottom surface 32b, which contacts the manifold 12. A second through-hole 32c is formed in approximately the center of the heat insulating member 32, communicating with both bottom surfaces 32a, 32b.

[0035] In the first embodiment, the spacer member 30 is attached to the manifold 12 by a bolt 33. The bolt 33 passes through the first through hole 31c and the second through hole 32c and is screwed into a screw hole (not shown) of the manifold 12 to fasten the spacer member 30. When the bolt 33 is screwed, the head 33a of the bolt 33 is engaged with the stepped portion 31d of the first through hole 31c. The stepped portion 31d is made of a metal material and therefore has high strength. Therefore, even if stress concentration occurs due to the screwing of the bolt 33, the stepped portion 31d is less likely to be damaged, such as chipped or cracked.

[0036] Furthermore, when the mold is clamped during resin molding, a large load is applied in the buckling direction (axial direction of the cylinder) to the spacer member 30 inserted between the fixed mold 3 and the manifold 12. However, since the metal member 31 is made of a metal material, there is little risk of the spacer member 30 buckling or breaking.

[0037] Similarly, a large load is applied to the heat insulating member 32 in the buckling direction. However, as shown in FIG. 2, the heat insulating member 32 has a simple cylindrical shape (disk shape), and the load in the buckling direction is borne by both bottom surfaces 32a, 32b as a whole. The second through hole 32c does not have a stepped portion, and there is no location where stress concentration can occur. Therefore, the heat insulating member 32 is very unlikely to be damaged, such as by chipping or cracking. If the heat insulating member 32 is made of resin, rubber, or the like, its elasticity can more effectively contribute to reducing stress concentration in the metal member 31 and preventing damage.

[0038] A spacer member 30 is inserted between the fixed mold 3 and the manifold 12, and is configured to transfer heat from the manifold 12 to the fixed mold 3 via a heat insulating member 32 and a metal member 31. As described above, the spacer member 30 of the first embodiment is less likely to break than a riser pad made of a material such as ceramic or zirconia, and has a higher heat insulating effect than a riser pad made only of a metal material.

[0039] [Embodiment 2] 3 is a vertical cross section of a spacer member 40 according to embodiment 2. The spacer member 40 may be inserted at any position between the fixed mold 3 and the manifold 12, but is preferably inserted and used primarily at position B. Note that in the spacer member 40, the same components as those of the spacer member 30 according to embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.

[0040] The spacer member 40 is configured to include a metal member 31 and a heat insulating member 32. The first through hole 31c formed in the metal member 31 does not have a stepped portion 31d and has a uniform inner diameter. A protrusion 31f that partially protrudes is formed on the second bottom surface 31b side of the metal member 31 of the spacer member 40. This protrusion 31f is adapted to fit into and engage with a positioning recess 12a (see FIG. 1) formed on the surface of the manifold 12.

[0041] The heat insulating member 32 is disposed so as to surround the periphery of the protrusion 31f. The heat insulating member 32 is annular, and its third bottom surface 32a contacts the second bottom surface 31b of the metal member 31, and its fourth bottom surface 32b contacts the manifold 12. The first bottom surface 31a of the metal member 31 contacts the fixed mold 3.

[0042] The engagement between the protrusion 31f and the recess 12a allows the spacer member 40 to be positioned with high precision relative to the manifold 12. The first through-hole 31c is adapted to receive the valve pin 23. The spacer member 40 is not fixed to the manifold 12 using the bolt 33 as in the first embodiment.

[0043] [Embodiment 3] FIG. 4 is a longitudinal cross-sectional view of a spacer member 50 according to a third embodiment. The spacer member 50 may be inserted at any position between the fixed mold 3 and the manifold 12, but is preferably inserted at position C for use. In the spacer member 50, the same components as those of the spacer member 30 according to the first embodiment are denoted by the same reference numerals, and their description will be omitted. As shown in FIG. 1, at position C, the positional relationship (vertical positions) between the fixed mold 3 and the manifold 12 is reversed from that in positions A and B. Therefore, the vertical direction in FIG. 4 is opposite to the vertical direction in FIG. 1. In the third embodiment, too, the first bottom surface 31a of the metal member 31 contacts the fixed mold 3, the second bottom surface 31b contacts the heat insulating member 32, the third bottom surface 32a of the heat insulating member 32 contacts the metal member 31, and the fourth bottom surface 32b contacts the manifold 12.

[0044] The spacer member 50 is configured to include a metal member 31 and a heat insulating member 32. The first through hole 31c formed in the metal member 31 does not have a stepped portion 31d, and like the second through hole 32c, its inner diameter is uniform. The metal member 31 in the spacer member 50 has a simple cylindrical shape (disc shape), and the heat insulating member 32 also has a simple cylindrical shape (disc shape).

[0045] In the spacer member 50, the metal member 31 and the heat insulating member 32 are bonded together with an adhesive 34. That is, the adhesive 34 is applied to the second bottom surface 31b of the metal member 31 and the third bottom surface 32a of the heat insulating member 32, bonding the two members together. Various types of adhesive 34 can be used, and an adhesive with high heat resistance and heat insulating performance is particularly preferred. This enables the metal member 31 and the heat insulating member 32 to be joined together without using bolts 33. The adhesive 34 may also be applied to the fourth bottom surface 32b of the heat insulating member 32, thereby bonding the heat insulating member 32 to the manifold 12. Of course, the adhesive 34 may be applied only between the metal member 31 and the heat insulating member 32 or between the heat insulating member 32 and the fourth bottom surface 32b.

[0046] [Embodiment 4] 5 is a vertical cross section of a spacer member 60 according to embodiment 4. The spacer member 60 may be inserted at any position between the fixed mold 3 and the manifold 12. Note that in the spacer member 60, the same components as those of the spacer member 30 according to embodiment 1 are denoted by the same reference numerals, and the description thereof will be omitted.

[0047] The spacer member 60 is configured to include a metal member 31 and a heat insulating member 32. The first through hole 31c formed in the metal member 31 does not have a stepped portion 31d and has a uniform inner diameter. The metal member 31 in the spacer member 60 has a simple cylindrical shape (disk shape).

[0048] 5, the heat insulating member 32 of the spacer member 60 is formed with a fitting portion 32e. The fitting portion 32e is a protruding portion formed to protrude toward the third bottom surface 32a of the heat insulating member 32, and its outer periphery approximately matches the inner diameter of the first through hole 31c. The fitting portion 32e can be fitted into the first through hole 31c.

[0049] A second through hole 32c is formed within the fitting portion 32e. A stepped portion 32f is formed midway through the second through hole 32c. When the spacer member 60 is fastened to the manifold 12 with a bolt 33, the head 33a of the bolt 33 is engaged with the stepped portion 32f. In this fourth embodiment, the stepped portion 32f, on which the head 33a of the bolt 33 is engaged, is part of the heat insulating member 32, and is therefore made of a heat insulating material rather than a metal material. When strong fastening is not required when fastening with the bolt 33, the spacer member 60 according to the fourth embodiment can be preferably applied.

[0050] [Variations] In the above-described first embodiment, an example has been described in which the spacer member 30 is fixed to the manifold 12, the metal member 31 of the spacer member 30 is located on the fixed mold 3 side, and the heat insulating member 32 is located on the manifold 12 side. However, this does not have to be limited to this. For example, the spacer member 30 may be fixed to the fixed mold 3 side with bolts 33, adhesive 34, or the like, the heat insulating member 32 of the spacer member 30 may be located on the fixed mold 3 side, and the metal member 31 may be located on the manifold 12 side.

[0051] By using metal member 31 on the side that is not fixed by bolts 33, adhesive 34, etc. (the manifold 12 side in this modified example; in embodiment 1, the fixed mold 3 side), damage such as chipping or cracking of spacer member 30 can be prevented even if shear force (lateral displacement) occurs in spacer member 30 due to stress caused by thermal expansion, etc.

[0052] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these and various modifications and changes are possible within the scope of the gist of the present invention. For example, the present invention includes the following aims.

[0053] (Objective 1) A spacer member for hot runner molding that is inserted between a fixed mold and a manifold and is arranged in contact with the fixed mold and the manifold, the spacer member has a first member made of metal and a second member made of a heat insulating material; the first member has a cylindrical or polygonal prism shape having a first height, one of both bottom surfaces of which contacts the fixed mold and the other of which contacts the second member, and a first through hole is formed in the approximate center of the first member and communicates with both bottom surfaces of the first member; the second member has a cylindrical or polygonal prism shape having a second height, one of both bottom surfaces of which contacts the first member and the other of which contacts the manifold, and a second through-hole is formed in the approximate center of the second member and communicates with both bottom surfaces of the second member; A spacer member for hot runner molding configured to transfer heat from the manifold to the fixed mold through the second member and the first member.

[0054] (Objective 2) An adhesive may be disposed between the first member and the second member, and / or an adhesive may be disposed between the second member and the manifold.

[0055] (Objective 3) The second member may be a non-metallic material.

[0056] (Objective 4) The other bottom surface of the second member may be formed with a protrusion that engages with a positioning recess formed on a surface of the manifold.

[0057] (Objective 5) The first through hole may be a stepped through hole formed by a plurality of holes having different diameters.

[0058] (Objective 6) The second member may have a fitting portion formed on the one bottom surface side thereof that fits into the first through hole.

[0059] (Objective 7) The first member may have a honeycomb structure.

[0060] (Objective 8) The fixed mold; the manifold; The spacer member for hot runner molding, a movable mold disposed opposite the fixed mold and clamped to the fixed mold; a press device for clamping the fixed mold and the movable mold together. [Explanation of symbols]

[0061] A~C:Position H1: Height (first height) H2: Height (second height) 1: Injection molding machine (molding equipment) 1a: Nozzle 1b: Bush 2: Press equipment 3: Fixed mold (hot runner mold) 4: Movable mold 5: Dispenser (supply device) 6: Resin material 10:Void (inside the mold) 12: Manifold 12a: Recess 21: Gate (exit) 22: Resin flow path 23: Valve pin 24: Shaft 30, 40, 50, 60: Spacer member (riser pad) 31: Metal member (first member) 31a: First bottom surface (one of the bottom surfaces) 31b: Second bottom surface (other bottom surface) 31c: 1st through hole 31d: Stepped part 31e:Honeycomb structure 31f:Protrusion 32: Heat insulating member (second member) 32a: Third bottom surface (one of the bottom surfaces) 32b: 4th bottom surface (other bottom surface) 32c: 2nd through hole 32e: Inset part 32f: stepped section 33: Bolt 33a:Head 34: Adhesive

Claims

1. A spacer member for hot runner molding that is inserted between a fixed mold and a manifold and is arranged in contact with the fixed mold and the manifold, the spacer member has a first member made of metal and a second member made of a heat insulating material; the first member has a cylindrical or polygonal prism shape having a first height, one of both bottom surfaces of which contacts the fixed mold and the other of which contacts the second member, and a first through hole is formed in the approximate center of the first member and communicates with both bottom surfaces of the first member; the second member has a cylindrical or polygonal prism shape having a second height, one of both bottom surfaces of which contacts the first member and the other of which contacts the manifold, and a second through-hole is formed in the approximate center of the second member and communicates with both bottom surfaces of the second member; A spacer member for hot runner molding configured to transfer heat from the manifold to the fixed mold through the second member and the first member.

2. 2. The spacer member for hot runner molding according to claim 1, wherein an adhesive is disposed between the first member and the second member, and / or an adhesive is disposed between the second member and the manifold.

3. The spacer member for hot runner molding according to claim 1 , wherein the second member is a non-metallic material.

4. 2. The spacer member for hot runner molding according to claim 1, wherein a protrusion is formed on the other bottom surface of the second member to engage with a positioning recess formed on the surface of the manifold.

5. 2. The spacer member for hot runner molding according to claim 1, wherein the first through hole is a stepped through hole formed by a plurality of holes having different diameters.

6. 2. The spacer member for hot runner molding according to claim 1, wherein a fitting portion that fits into the first through hole is formed on the bottom surface side of the second member.

7. The spacer member for hot runner molding according to claim 1 , wherein the first member has a honeycomb structure.

8. The fixed mold; the manifold; The spacer member for hot runner molding according to claim 1; a movable mold disposed opposite the fixed mold and clamped to the fixed mold; a press device for clamping the fixed mold and the movable mold together.

Images