Molding system

Abstract

The present invention provides a molding system that allows for easy replacement of the plunger tip and precise control of the tip temperature. [Solution] The molding system includes a plunger 21 and a heater 28 for heating the plunger 21. The plunger 21 has a base portion 22, a tip portion 23 separate from the base portion 22, and a coupling member 24 that detachably connects the upper end of the tip portion 23 to the lower end of the base portion 22. The tip portion 23 has a heater housing hole 23e extending from the upper end to the lower end of the tip portion 23. The coupling member 24 has a first cable hole 25a that opens on the outer surface of the coupling member 24 and leads to the heater housing hole 23e.

Description

Technical Field

[0001] The present invention relates to a molding system.

Background Art

[0002] Patent Document 1 discloses a conventional transfer molding machine. The transfer molding machine of Patent Document 1 is used to mold a product in which an insert part (work), which is a substrate on which a semiconductor chip is mounted, and a resin covering the semiconductor chip are integrated. The transfer molding machine has an upper mold, a lower mold, and a toggle link mechanism used for clamping the upper mold and the lower mold. The lower mold is provided with a cylindrical pot for loading a resin tablet. The resin tablet is melted in the pot and is pushed by a plunger to fill a space (cavity) formed between the upper mold and the insert part arranged in the lower mold.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a transfer molding machine, when the mold is changed, the shape of the pot may also be changed, and it is required to be able to easily replace the plunger that conforms to the shape of the pot. Further, in order to stabilize the quality of the molded product, it is required to control the temperature of the plunger. In order to achieve both of these, for example, (i) a male thread is provided at the tip portion of the plunger and a female thread is provided at the base end portion so that the tip portion and the base end portion can be detachably attached by a screw structure, and (ii) a heater is provided at the base end portion and the tip portion is heated by the heat transmitted from the base end portion. However, in this configuration, since the distance between the heater and the tip portion is relatively large, it is difficult to accurately control the temperature of the tip portion.

[0005] Therefore, the present invention aims to provide a molding system that allows for easy replacement of the plunger tip and precise control of the tip temperature. [Means for solving the problem]

[0006] To achieve the above objective, the molding system according to the present invention is a molding system comprising: a columnar plunger for pushing resin into a space formed between a fixed mold and a movable mold, or into a space formed in an insert part sandwiched between the fixed mold and the movable mold; and a heater for heating the plunger, wherein the plunger has a base portion, a tip portion separate from the base portion, and a coupling member that detachably connects one end of the tip portion to one end of the base portion, the tip portion has a heater housing hole extending from one end to the other end of the tip portion, and the coupling member has a first cable hole opening on the outer surface of the coupling member and leading to the heater housing hole. [Effects of the Invention]

[0007] According to the present invention, the tip portion of the plunger is detachably connected to the base portion by a connecting member. Therefore, the tip portion of the plunger can be easily replaced. Furthermore, a heater can be placed in a heater housing hole in the tip portion of the plunger, and a cable connected to the heater can be routed to the outside of the plunger through a first cable hole. Therefore, the heater is positioned inside the tip portion of the plunger, and the temperature of the tip portion of the plunger can be precisely controlled. [Brief explanation of the drawing]

[0008] [Figure 1] A side view of a molding system according to one embodiment of the present invention. [Figure 2] Figure 1 is a plan view of the molding system. [Figure 3] Figure 1 is a functional block diagram of the molding system. [Figure 4]This figure shows the plunger of the molding system shown in Figure 1. [Figure 5] Figure 4 is a side view of the plunger (with the connecting member separated). [Figure 6] Figure 4 shows the plunger, as well as the temperature sensor and heater housed within it, in an exploded view. [Figure 7] This figure shows the tip portion of the plunger shown in Figure 4. [Figure 8] This figure shows the products manufactured using the molding system shown in Figure 1. [Figure 9] Figure 8 is a perspective view showing the insert components and multiple magnets of the product. [Figure 10] This is a cross-sectional view (part 1) illustrating an example of the operation of the molding system shown in Figure 1. [Figure 11] This is a cross-sectional view (part 2) illustrating an example of the operation of the molding system shown in Figure 1. [Figure 12] This is a cross-sectional view illustrating an example of the operation of the molding system shown in Figure 1 (part 3). [Figure 13] This is a cross-sectional view illustrating an example of the operation of the molding system shown in Figure 1 (part 4). [Figure 14] This is a cross-sectional view illustrating an example of the operation of the molding system shown in Figure 1 (part 5). [Figure 15] This is a cross-sectional view illustrating an example of the operation of the molding system shown in Figure 1 (part 6). [Figure 16] This is a cross-sectional view illustrating an example of the operation of the molding system shown in Figure 1 (part 7). [Modes for carrying out the invention]

[0009] The configuration of a molding system according to one embodiment of the present invention will be described below with reference to Figures 1 to 16.

[0010] Figs. 1 and 2 are side and plan views of a molding system according to an embodiment of the present invention. Fig. 3 is a functional block diagram of the molding system of Fig. 1. Figs. 4A and 4B are front and side views of a plunger included in the molding system of Fig. 1. Fig. 5 is a side view of the plunger of Fig. 4. In Fig. 5, the coupling member of the plunger is split. Fig. 6 is an exploded view of the plunger of Fig. 4, as well as a temperature sensor and a heater housed in the plunger. In Fig. 6, the coupling member of the plunger is omitted. Figs. 7A, 7B, and 7C are front, side, and plan views of a tip portion of the plunger of Fig. 4. Fig. 7D is a cross-sectional view taken along line D-D of Fig. 7B. Fig. 7E is a cross-sectional view taken along line E-E of Fig. 7C. Fig. 8A is a plan view of a product produced by the molding system of Fig. 1, and Fig. 8B is a cross-sectional view taken along line B-B of Fig. 8A. Fig. 9 is a perspective view showing an insert part and a plurality of magnets included in the product of Fig. 8. Figs. 10 to 16 are cross-sectional views for explaining an operation example of the molding system of Fig. 1.

[0011] The molding system of this embodiment includes a vertical molding machine that opens and closes a fixed mold and a movable mold in the vertical direction. The present invention is also applicable to a horizontal molding machine that opens and closes a fixed mold and a movable mold in the horizontal direction.

[0012] The molding system 1 according to this embodiment is used to produce a product 200, which is a molded product, by filling a resin into a space formed in an insert part 100. Note that the molding system 1 may be configured to fill a resin into a space (cavity) formed between a fixed mold and a movable mold.

[0013] First, the product 200 will be described with reference to Figs. 8 and 9.

[0014] The product 200 is, for example, a rotor used in a motor of an electric vehicle. As shown in Figs. 8 and 9, the product 200 has an insert part 100, a plurality of magnets 110, and a plurality of resin parts 120.

[0015] The insert component 100 has a cylindrical shape. The insert component 100 has a plurality of magnet holes 105 extending from one end face 100a to the other end face 100b. The shape of the magnet holes 105 when viewed from the direction of the central axis L is trapezoidal. The plurality of magnet holes 105 are arranged in a circumferential direction. The direction of the central axis L is the thickness direction of the insert component 100. The insert component 100 is made by stacking a plurality of annular electromagnetic steel sheets 101 in the direction of the central axis L. The insert component 100 may be obtained, for example, by machining a cylindrical metal workpiece.

[0016] Multiple magnets 110 have a rod shape. When viewed from the direction of the central axis L, the shape of the magnet 110 is trapezoidal. The radial length of the magnet 110 (height of the trapezoid) is shorter than the radial length of the magnet hole 105. Multiple magnets 110 are inserted into multiple magnet holes 105. The magnets 110 are positioned towards the radially outer side of the magnet hole 105.

[0017] Multiple resin parts 120 are formed into rod shapes by solidifying an adhesive 300 containing a thermosetting resin that is filled into the radially inward portion (space 107) of the magnet hole 105. The shape of the resin part 120 when viewed from the direction of the central axis L is trapezoidal. The resin part 120 fills the gap between the inner circumferential surface of the magnet hole 105 and the magnet 110, thereby joining the insert part 100 and the magnet 110. Note that the resin part 120 may contain a thermoplastic resin instead of a thermosetting resin.

[0018] Next, the molding system 1 will be described with reference to Figures 1 to 7 and Figure 13.

[0019] As shown in Figures 1 to 3, the molding system 1 includes an automatic machine 5, a conveyor 6, and a transfer molding machine 7.

[0020] The automated machine 5 has a transport arm and is used to move the insert part 100, multiple magnets 110, product 200, and adhesive 300. The automated machine 5 is located near the conveyor 6 and the transfer molding machine 7. The insert part 100 is heated while being transported by the conveyor 6 to a suitable temperature for filling with adhesive 300.

[0021] The transfer molding machine 7 includes a mold clamping device 10, an injection device 20, a temperature control device 26, and a control device 30.

[0022] The die clamping device 10 includes a rotary table 11, a movable die plate 12, a tailstock 13, a plurality of tie bars 14, a rotary drive mechanism 15, an adjustment device 16, and a toggle link mechanism 17.

[0023] The rotary table 11 has a disc shape and is rotatably mounted on a base 9 supported by a frame 8. Two fixed-side molds 3 are mounted on the rotary table 11 at 180-degree intervals. The rotary table 11 is rotated by a rotary drive mechanism 15, alternately positioning the two fixed-side molds 3 at the first station S1 (left position in Figures 1 and 2) and the second station S2 (right position in Figures 1 and 2). The base 9 and the rotary table 11 are fixed die plates.

[0024] The movable die plate 12 is positioned above the rotary table 11. The movable die plate 12 is movable in the vertical direction. The vertical direction is the clamping direction. The movable die plate 12 is provided with a pot 12a, which is a circular hole. A cylindrical solid adhesive 300 is fed into the pot 12a by an automatic machine 5.

[0025] The movable die plate 12 is fitted with the movable mold 4. The movable mold 4 has an upper mold 4a and a lower mold 4b that are separable in the vertical direction. The movable mold 4 is provided with a runner and a gate that lead to the pot 12a. The movable mold 4 faces the fixed mold 3 located at the second station S2 in the vertical direction.

[0026] The tailstock 13 is positioned below the base 9 so as to be movable in the vertical direction. Multiple tie bars 14 extend vertically through the base 9 and connect the movable die plate 12 and the tailstock 13. The vertical distance between the movable die plate 12 and the tailstock 13 can be adjusted by an adjustment device 16.

[0027] The toggle link mechanism 17 is located between the base 9 and the tailstock 13. The toggle link mechanism 17 bends as shown in Figures 13 and 16, and extends as shown in Figures 14 and 15.

[0028] When the toggle link mechanism 17 bends, the distance between the base 9 and the tailstock 13 decreases, and the distance between the rotary table 11 and the movable die plate 12, which are positioned on the base 9, increases, causing the movable mold 4 to move away from the fixed mold 3. The fixed mold 3 and the movable mold 4 become separated. At this time, the upper mold 4a and the lower mold 4b of the movable mold 4 separate in the vertical direction.

[0029] As the toggle link mechanism 17 extends, the distance between the base 9 and the tailstock 13 increases, and the distance between the rotary table 11 and the movable die plate 12, which are positioned on the base 9, decreases, bringing the movable mold 4 closer to the fixed mold 3. The fixed mold 3 and the movable mold 4 then clamp the insert part 100. At this time, the upper mold 4a and the lower mold 4b of the movable mold 4 come into contact, and the runner of the movable mold 4 communicates with the pot 12a.

[0030] The injection device 20 is positioned above the movable die plate 12. The injection device 20 has a plunger 21 which is cylindrical in shape overall. The plunger 21 is movable in the vertical direction. The temperature control device 26 has a temperature sensor 27 and a heater 28 which are housed in the plunger 21.

[0031] The plunger 21, temperature sensor 27, and heater 28 will be described with reference to Figures 4 to 7.

[0032] The plunger 21 has a base portion 22, a tip portion 23, and a connecting member 24. The base portion 22, the connecting member 24, and the tip portion 23 each have their central axes coincide with the central axis K and are arranged in order from top to bottom.

[0033] The base portion 22 integrally comprises a base body 22a, a base neck 22b, and a base head 22c, which are connected in order from top to bottom. The base body 22a, base neck 22b, and base head 22c are all cylindrical in shape and are arranged coaxially. The diameter of the base body 22a is larger than the diameter of the base head 22c. The diameter of the base head 22c is larger than the diameter of the base neck 22b. The base neck 22b and the base head 22c are located at the lower end (one end) of the base portion 22. The upper end of the base portion 22 is connected to the injection mechanism (not shown) of the injection device 20, which moves the plunger 21 in the vertical direction.

[0034] The tip portion 23 integrally comprises a tip body portion 23a, a tip neck portion 23b, and a tip head portion 23c, connected in order from bottom to top. The tip body portion 23a, tip neck portion 23b, and tip head portion 23c are all cylindrical in shape and are arranged coaxially. The diameter of the tip body portion 23a is larger than the diameter of the tip head portion 23c. The diameter of the tip head portion 23c is larger than the diameter of the tip neck portion 23b. The tip neck portion 23b and the tip head portion 23c are located at the upper end (one end) of the tip portion 23. The upper end of the tip portion 23 is connected to the lower end of the base portion 22 using a connecting member 24. The lower end (other end) of the tip portion 23 is inserted into the pot 12a.

[0035] The tip portion 23 has a lateral groove 23d, a heater housing hole 23e, and two sensor housing holes 23f.

[0036] The transverse groove 23d is provided on the upper end surface of the tip head 23c and extends in a direction perpendicular to the central axis K (lateral direction).

[0037] The heater housing hole 23e opens to the bottom surface of the horizontal groove 23d, passes through the tip neck portion 23b, and extends along the central axis K to near the lower end of the tip body portion 23a. The central axis of the heater housing hole 23e coincides with the central axis K. The heater 28 is an electric heater that generates heat when energized. The heater 28 has a rod-shaped heating element 28a and a connecting element 28b connected to the upper end of the heating element 28a, with a connector (receptacle) facing laterally. The heating element 28a is positioned in the heater housing hole 23e. The connecting element 28b is positioned across the horizontal groove 23d and the heater housing hole 23e. The connector of the connecting element 28b is directed toward one end of the horizontal groove 23d.

[0038] The two sensor housing holes 23f open to the bottom surface of the lateral groove 23d, pass through the tip neck portion 23b, and extend along the central axis K to near the lower end of the tip body portion 23a. The two sensor housing holes 23f are shorter and narrower than the heater housing hole 23e. The two sensor housing holes 23f are arranged so as to sandwich the heater housing hole 23e between them. A temperature sensor 27 is placed in one of the two sensor housing holes 23f. The temperature sensor 27 has a sensor cable 27a and a sensor element (e.g., a thermocouple) (not shown) placed at the end of the sensor cable 27a.

[0039] The connecting member 24 has a cylindrical shape. The connecting member 24 has a first part 24a and a second part 24b. Each of the first part 24a and the second part 24b has a shape (semi-cylinder) obtained by dividing the connecting member 24 (cylinder) in two along the central axis K.

[0040] The first portion 24a has a dividing surface 24a1 along the central axis K. The dividing surface 24a1 is provided with a first recess 24a2 extending from the upper end surface to the lower end surface of the first portion 24a. The first portion 24a has notches at the four corners when viewed from the front, and through holes 24a3 are provided extending from the notches to the dividing surface 24a1.

[0041] The second portion 24b has a dividing surface 24b1 along the central axis K. The dividing surface 24b1 is provided with a second recess 24b2 extending from the upper end surface to the lower end surface of the second portion 24b. The second portion 24b has notches at the four corners when viewed from the back, and female threads 24b3 are provided extending from the notches to the dividing surface 24b1.

[0042] The first part 24a and the second part 24b are fastened together by a bolt 24c having a male thread, which is inserted through a through hole 24a3 from the front side and screwed into a female thread 24b3, with the dividing surface 24a1 and the dividing surface 24b1 in contact. The bolt 24c is a fastening member. The first recess 24a2 and the second recess 24b2 form an inner space 24d extending from the upper end surface to the lower end surface of the connecting member 24. The upper half of the inner space 24d is a space having the same shape as the outer shape of the base neck portion 22b and the base head portion 22c. The lower half of the inner space 24d is a space having the same shape as the outer shape of the tip neck portion 23b and the tip head portion 23c (specifically, the tip head portion 23c before the lateral groove 23d is provided). "Same shape" includes strictly identical shapes and substantially identical shapes.

[0043] The base neck portion 22b and base head portion 22c are positioned in the upper half of the inner space 24d, and the tip neck portion 23b and tip head portion 23c are positioned in the lower half of the inner space 24d. As a result, the base portion 22 and the tip portion 23 are joined by the connecting member 24. In the inner space 24d, the lower end surface of the base head portion 22c and the upper end surface of the tip head portion 23c are in contact. The upper end surface of the connecting member 24 is in contact with the lower end surface of the base body portion 22a, and the lower end surface of the connecting member 24 is in contact with the upper end surface of the tip body portion 23a.

[0044] The connecting member 24 has a first cable hole 25a. The first cable hole 25a opens to the front on the outer surface of the first portion 24a and is connected to the location where the tip head 23c is positioned in the inner space 24d (first recess 24a2). The first cable hole 25a is connected to one end of the lateral groove 23d and leads to the heater housing hole 23e via the lateral groove 23d. The connector of the heater 28 is visible through the first cable hole 25a and the lateral groove 23d. The heater cable 29 is inserted into the first cable hole 25a and the lateral groove 23d, and the connector (plug) of the heater cable 29 is connected to the connector of the heater 28.

[0045] The coupling member 24 has a second cable hole 25b. The second cable hole 25b opens toward the rear on the outer surface of the second portion 24b and is connected to the location where the tip head 23c is positioned in the inner space 24d (second recess 24b2). The second cable hole 25b is connected to the other end of the lateral groove 23d and leads to the sensor housing hole 23f via the lateral groove 23d. The sensor cable 27a of the temperature sensor 27 located in the sensor housing hole 23f is pulled out to the outside of the coupling member 24 through the lateral groove 23d and the second cable hole 25b.

[0046] The control device 30 controls the operation of the entire molding system 1. The control device 30 has a microcomputer. The control device 30 controls the automatic machine 5, the conveyor 6, the clamping device 10 (rotary drive mechanism 15, adjustment device 16, toggle link mechanism 17), the injection device 20, and the temperature control device 26 (temperature sensor 27, heater 28).

[0047] An example of the operation for producing product 200 in the molding system 1 (control device 30) will be explained with reference to Figures 10 to 16.

[0048] (1) The control device 30 controls the automatic machine 5 to move the insert part 100 from the conveyor 6 and place it on the fixed mold 3 positioned at the first station S1 (Figure 10). The insert part 100 is placed on the fixed mold 3 so that its central axis L is aligned in the vertical direction.

[0049] (2) The control device 30 controls the automatic machine 5 to insert multiple magnets 110 into multiple magnet holes 105 of the insert part 100 (Figure 11).

[0050] (3) When the control device 30 confirms that the toggle link mechanism 17 is bent (i.e., the fixed mold 3 and the movable mold 4 located at the second station S2 are in an open state), it controls the rotary drive mechanism 15 to rotate the rotary table 11 by 180 degrees. As a result, the fixed mold 3 on which the insert part 100 is placed moves from the first station S1 to the second station S2, and the fixed mold 3 on which the product 200 is placed moves from the second station S2 to the first station S1 (Figures 12 and 13).

[0051] (4) When the product 200 is placed on the fixed mold 3 located at the first station S1, the control device 30 controls the automatic machine 5 to move the product 200 from the fixed mold 3 and place it in a predetermined product storage area (Figure 12).

[0052] (5) The control device 30 starts controlling the power supply to the heater 28 so that the temperature of the plunger 21 (tip portion 23) measured by the temperature sensor 27 becomes a temperature suitable for filling with adhesive 300.

[0053] (6) The control device 30 controls the toggle link mechanism 17 to extend it and clamp the fixed mold 3 and the movable mold 4, which are positioned at the second station S2 (Figure 14). As a result, the upper mold 4a and the lower mold 4b of the movable mold 4 come into contact, the insert part 100 is held between the fixed mold 3 and the movable mold 4, and the pot 12a communicates with the space 107 of the insert part 100 (a location closer to the radially inward side of the magnet hole 105) via the runner and gate of the movable mold 4. An appropriate clamping force is applied to the insert part 100.

[0054] (7) The control device 30 controls the automatic machine 5 to pour the adhesive 300 into the pot 12a (Figure 14). At this time, the fixed mold 3 and the movable mold 4, as well as the plunger 21, are heated to a temperature suitable for filling with adhesive 300. The adhesive 300 poured into the pot 12a begins to melt.

[0055] (8) The control device 30 controls the injection device 20 to move the plunger 21 downward (Figure 15). This allows the adhesive 300 to pass through the runner and gate of the movable mold 4 and fill the space 107 of the insert part 100.

[0056] (9) After the adhesive 300 filling the space 107 has solidified and become the resin portion 120, the control device 30 controls the toggle link mechanism 17 to bend the toggle link mechanism 17 and open the fixed mold 3 and the movable mold 4 located at the second station S2 (Figure 16). As a result, the upper mold 4a and lower mold 4b of the movable mold 4 open, the runner resin 310 between them is removed, and the movable mold 4 separates from the product 200. The control device 30 stops the power supply control of the heater 28. The control device 30 may also keep the power supply control of the heater 28 on at all times during the operation to manufacture the product 200.

[0057] Thereafter, the control device 30 repeats the operations (1) to (9) described above.

[0058] As described above, the molding system 1 includes a plunger 21 and a heater 28 for heating the plunger 21. The plunger 21 has a cylindrical shape and pushes resin into a space 107 formed in an insert part 100 sandwiched between a fixed mold 3 and a movable mold 4. The plunger 21 has a base portion 22, a tip portion 23 separate from the base portion 22, and a connecting member 24 that removably connects the upper end of the tip portion 23 to the lower end of the base portion 22. The tip portion 23 has a heater housing hole 23e extending from the upper end to the lower end of the tip portion 23. The connecting member 24 has a first cable hole 25a that opens on the outer surface of the connecting member 24 and leads to the heater housing hole 23e. As a result, the tip portion 23 of the plunger 21 is detachably connected to the base portion 22 by the connecting member 24. Therefore, the tip portion 23 of the plunger 21 can be easily replaced. In addition, a heater 28 is placed in the heater housing hole 23e of the tip portion 23 of the plunger 21, and a heater cable 29 connected to the heater 28 can be pulled out to the outside of the plunger 21 through the first cable hole 25a. Therefore, the heater 28 is positioned inside the tip portion 23 of the plunger 21, and the temperature of the tip portion 23 of the plunger 21 can be precisely controlled.

[0059] Furthermore, the molding system 1 has a temperature sensor 27 for measuring the temperature of the plunger 21. The tip portion 23 has a sensor housing hole 23f extending from the upper end to the lower end of the tip portion 23. The connecting member 24 has a second cable hole 25b that opens on the outer surface of the connecting member 24 and leads to the sensor housing hole 23f. As a result, the temperature sensor 27 can be placed in the sensor housing hole 23f of the tip portion 23 of the plunger 21, and the sensor cable 27a of the temperature sensor 27 can be routed out to the outside of the plunger 21 through the second cable hole 25b. Therefore, the temperature sensor 27 is positioned inside the tip portion 23 of the plunger 21, and the temperature of the tip portion 23 of the plunger 21 can be accurately controlled based on the temperature measured by the temperature sensor 27.

[0060] Furthermore, the base portion 22 integrally comprises a cylindrical base body portion 22a, a cylindrical base neck portion 22b, and a cylindrical base head portion 22c, which are connected coaxially in sequence. The diameter of the base head portion 22c is larger than the diameter of the base neck portion 22b. The base neck portion 22b and the base head portion 22c are positioned at the lower end of the base portion 22. The tip portion 23 integrally comprises a cylindrical tip body portion 23a, a cylindrical tip neck portion 23b, and a cylindrical tip head portion 23c, which are connected coaxially in sequence. The diameter of the tip head portion 23c is larger than the diameter of the tip neck portion 23b. The tip neck portion 23b and the tip head portion 23c are positioned at the upper end of the tip portion 23. The tip head 23c has a radially extending transverse groove 23d. The heater housing hole 23e opens into the bottom surface of the horizontal groove 23d, passes through the tip neck portion 23b, and extends to the tip body portion 23a. The first cable hole 25a is connected to one end of the horizontal groove 23d. The connecting member 24 has a first portion 24a and a second portion 24b. The first portion 24a and the second portion 24b each have a dividing surface 24a1 and a dividing surface 24b1 along the central axis K. The first portion 24a and the second portion 24b are fastened together by bolts 24c with the dividing surfaces 24a1 and 24b1 in contact. An inner space 24d is formed between the first portion 24a and the second portion 24b. The upper half of the inner space 24d is a space having the same shape as the outer shape of the base neck portion 22b and the base head portion 22c, and the lower half is a space having the same shape as the outer shape of the tip neck portion 23b and the tip head portion 23c. In this way, the base portion 22 and the tip portion 23 can be joined using a relatively simple connecting member 24.

[0061] Furthermore, the lower end surface of the base head 22c and the upper end surface of the tip head 23c are in contact in the inner space 24d of the connecting member 24. This configuration ensures that the base portion 22 can reliably push the tip portion 23 downwards.

[0062] In the molding system 1, the fixed mold 3 is placed on the rotary table 11. However, instead of the rotary table 11, for example, a slide table that slides horizontally in Figure 1 may be provided, and the fixed mold 3 may be placed on the slide table to position the fixed mold 3 at the first station S1 and the second station S2. Alternatively, a fixed die plate may be provided that faces the movable die plate 12 in the vertical direction, and the fixed mold 3 may be placed on the fixed die plate so that the fixed mold 3 always faces the movable mold 4 in the vertical direction.

[0063] Although embodiments of the present invention have been described above, the present invention is not limited to these examples. For example, the present invention may be applied to molding systems having molding machines other than transfer molding machines, and additions, deletions, and design modifications of components to the above embodiments as appropriate by those skilled in the art, or combinations of features of the embodiments as appropriate, are also included in the scope of the present invention, as long as they do not contradict the spirit of the present invention. [Explanation of Symbols]

[0064] 1... Molding system, 3... Fixed mold, 4... Movable mold, 4a... Upper mold, 4b... Lower mold 5...Automatic machine, 6...Conveyor, 7...Transfer molding machine, 8...Frame, 9...Base, 10…Clip clamping device, 11…Rotary table, 12…Movable die plate, 13...Tailstock, 14...Tie bar, 15...Rotating drive mechanism, 16...Adjustment device, 17...Toggle link mechanism, 20...Injection device, 21...plunger, 22...base portion, 23...tip portion, 23d...lateral groove, 23e...heater housing hole, 23f...sensor housing hole, 24...connecting member, 25a...first cable hole, 25b...second cable hole, 26...Temperature control device, 27...Temperature sensor, 28...Heater, 30...Control device, 100... Insert component, 105... Magnet hole, 107... Space, 110...Magnet, 120...Resin part, 200...Product, 300...Adhesive

Claims

1. A molding system comprising a columnar plunger for pushing resin into a space formed between a fixed mold and a movable mold, or into a space formed in an insert part sandwiched between the fixed mold and the movable mold, and a heater for heating the plunger, The plunger comprises a base portion, a tip portion separate from the base portion, and a connecting member that detachably connects one end of the tip portion to one end of the base portion. The aforementioned tip portion has a heater housing hole extending from one end to the other end of the tip portion, A molding system characterized in that the connecting member has a first cable hole that opens on the outer surface of the connecting member and leads to the heater housing hole.

2. The molding system has a temperature sensor for measuring the temperature of the plunger, The aforementioned tip portion has a sensor housing hole extending from one end to the other end of the tip portion, The molding system according to claim 1, wherein the connecting member has a second cable hole that opens on the outer surface of the connecting member and leads to the sensor housing hole.

3. The aforementioned tip portion integrally comprises a cylindrical tip body, a cylindrical tip neck, and a cylindrical tip head, which are connected coaxially in sequence. The diameter of the tip portion is larger than the diameter of the neck portion of the tip. The tip neck portion and the tip head portion are arranged at one end of the tip portion. The aforementioned tip portion has a transverse groove extending in the radial direction, The heater housing hole opens to the bottom surface of the horizontal groove, passes through the tip neck portion, and extends to the tip body portion. The molding system according to claim 1, wherein the first cable hole is connected to one end of the lateral groove.

4. The connecting member has a first portion and a second portion, Each of the first and second portions has a dividing surface along the central axis of the tip portion, The first part and the second part are fastened together by a fastening member with their respective dividing surfaces in contact. The molding system according to claim 3, wherein a space having the same shape as the outer shape of the tip neck and the tip head is formed between the first part and the second part.

5. The aforementioned base portion integrally comprises a cylindrical base body, a cylindrical base neck, and a cylindrical base head, which are connected coaxially in sequence. The diameter of the base head is larger than the diameter of the base neck. The base neck portion and the base head portion are arranged at one end of the base portion. The molding system according to claim 4, wherein a space having the same shape as the outer shape of the base neck portion and the base head portion is formed between the first portion and the second portion.

6. The molding system according to claim 1, wherein one end of the base portion and one end of the tip portion are in contact on the inside of the connecting member.

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