Mold equipment

Abstract

To prevent grease from running out during molding and from galling and damage to a part.SOLUTION: There is provided a mold device 100 having a fixed part 101A and a movable part 101B with a grease supply structure, comprising: a guide bush provided on the movable part 101B; a guide pin 8 that is provided on the fixed part 101A, and that slides in a guide bush 7 through a mold opening operation of the mold device 100; and a grease tank 1 that stores grease in a sealed structure and has a grease inlet for pouring the grease into the guide bush 7. The mold device has a configuration in which grease is drawn from the grease tank 1 through a grease inlet 4 into the guide bush 7 and poured into the sliding portion between the guide pin 8 and the guide bush 7 by using negative pressure generated within the guide bush 7 when the guide pin 8 comes out from the guide bush 7 through the mold opening operation of the mold device 100.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a mold device having a grease supply structure.

Background Art

[0002] In a mold, there is a structure that uses guide pins and guide bushes for precise positioning in aligning the upper mold and the lower mold. In this alignment, since the clearance of the diameter is small and there is a possibility of jamming, a method of applying grease to the sliding parts of the guide pins and guide bushes to prevent jamming is adopted.

[0003] Also, a molding machine that effectively utilizes the decompression force in the decompression process when supplying grease to grease supply parts such as toggle link mechanisms that operate when opening and closing the mold has been proposed (Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional grease supply, it is sufficient to add and prepare it before molding during maintenance, etc. However, if grease runs out during molding, it may lead to jamming and damage to parts.

[0006] The present invention has been made in view of such a background, and an object thereof is to provide a mold device that utilizes an opening operation capable of preventing grease from running out during molding and preventing jamming and damage to parts.

Means for Solving the Problems

[0007] To solve the above-mentioned problems and achieve the above objectives, one embodiment of the present invention is a mold apparatus having a fixed part and a movable part, comprising: a guide bush provided on the movable part; a guide pin provided on the fixed part and sliding within the guide bush during the mold opening operation of the mold apparatus; and a grease tank having a sealed structure for storing grease and a grease intake port for flowing the grease into the guide bush, wherein when the guide pin is removed from the guide bush during the mold opening operation of the mold apparatus, the negative pressure generated within the guide bush draws the grease from the grease tank into the guide bush through the grease intake port and flows it into the sliding portion between the guide pin and the guide bush. [Effects of the Invention]

[0008] According to the present invention, in a mold apparatus, it is possible to prevent grease depletion during molding, thereby preventing galling and damage to parts. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing one example of the structure of a grease tank according to Embodiment 1 of the present invention. [Figure 2] This is a configuration diagram showing an example of a mold apparatus equipped with a grease tank according to this first embodiment. [Figure 3] This is a diagram showing the mold opening of a mold apparatus equipped with a grease tank according to this first embodiment. [Figure 4] This is a diagram showing the mold opening of a mold apparatus equipped with a grease tank according to this first embodiment. [Figure 5] This is a diagram showing the mold opening of a mold apparatus equipped with a grease tank according to this first embodiment. [Figure 6] This is a diagram showing a guide bushing with a headband shape according to this second embodiment. [Figure 7] This is a diagram showing the mold opening of a mold apparatus equipped with a grease tank according to this second embodiment. [Figure 8] This is a diagram showing an example of a grease supply section using a solenoid valve according to this third embodiment. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings. Note that the following description and drawings are merely illustrative examples for explaining the present invention, and have been omitted or simplified as appropriate for clarity of explanation. Furthermore, the present invention can be implemented in various other forms.

[0011] <Embodiment 1> Hereinafter, Embodiment 1 of the present invention will be described with reference to Figures 1 to 5. Figure 1 is a configuration diagram showing an example of the structure of a grease tank according to Embodiment 1, Figure 2 is a configuration diagram showing an example of a mold apparatus equipped with a grease tank according to Embodiment 1, and Figures 3, 4 and 5 are configuration diagrams showing the mold opening of the mold apparatus equipped with a grease tank according to Embodiment 1.

[0012] Figures 1(a), (b), and (c) are three-view drawings of the grease tank. The grease tank 1 is provided with a grease filling groove 3, into which grease is pre-filled. The O-ring 2 is placed on the outer circumference of the grease filling groove 3, and the grease filling cover 6 is bolted over it. This seals the inside of the grease tank 1.

[0013] A grease inlet 4 is provided, connecting the grease input groove 3 to the outside, allowing grease to be drawn out of the grease tank 1 by negative pressure from the outside. The grease tank 1 is attached to the mold by mold mounting bolts 5.

[0014] Furthermore, as long as the material of grease tank 1 does not have any issues with strength or chemical resistance, the material can be freely selected.

[0015] Figure 2 shows the basic structure of the mold device and the installation state of the grease tank 1. The mold device 100 of the first embodiment is divided into a fixed part 101A and a movable part 101B. The fixed part 101A is composed of a fixed-side mounting plate 9 and a fixed mold plate 10, and the movable part 101B is composed of a movable mold plate 11, a spacer block 12, a movable-side mounting plate 13, a protruding plate (upper) 14, and a protruding plate (lower) 15.

[0016] As shown in FIGS. 1 and 2, the grease tank 1 is attached to the movable part 101B of the mold device, and its bottom surface has a structure inclined downward toward the grease inlet 4. There is a guide pin 8 from the fixed mold plate 10, and the corresponding side thereof is a guide bush 7 incorporated in the movable mold plate 11. The guide bush 7 and the guide pin 8 are responsible for the main operation of the first embodiment. When the mold device 100 starts to open the mold, as shown in FIG. 3, the guide pin 8 comes out of the guide bush 7, and at this time, a negative pressure is generated in the guide bush 7, and the grease is drawn into the sliding part in the guide bush 7 from the grease tank 1 through the grease inlet 4.

[0017] After that, the mold device 100 continues to open the mold, and as shown in FIG. 5 from the state of FIG. 4, the molded product 16 is taken out, and the mold device 100 returns to the closed state of FIG. 2 again. At this time, due to the guide pin 8, the mold is closed by stretching the grease drawn into the guide bush 7, so that by repeating the molding, the grease is drawn in and the grease is extended so as to conform to the whole. Thereby, molding can be performed without causing grease breakage.

[0018] As described above, according to the first embodiment, by utilizing the negative pressure in the guide bush generated during the mold opening operation of the mold forming operation, the grease is automatically added to the sliding part, so that even during molding, the grease can be drawn from the grease tank attached to the side surface of the mold to maintain a state where the grease does not run out.

[0019] According to this grease non-breaking structure, even if the mold opening operation is repeated, the grease is automatically applied continuously in the guide bush and to the guide pin, so that it is possible to prevent biting and damage to the parts. In particular, in a mold device, the guide pin and the guide bush are in highly accurate alignment, and such a prevention structure is beneficial in the mold. Also, by preventing damage to the parts, there is no occurrence of repair costs, the quality of the mold device is maintained, production itself does not stop, and the reliability of production operation is ensured.

[0020] Furthermore, in a mold device, the guide pin and the guide bush are in highly accurate alignment. If grease breakage occurs during molding, it will lead to biting and part damage. When biting and part damage occur, not only does production stop, but repair costs also occur.

[0021] <Embodiment 2> Hereinafter, Embodiment 2 of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a configuration diagram showing a guide bush with a bandage shape according to Embodiment 2, and FIG. 7 is a configuration diagram showing the mold opening of a mold device equipped with a grease tank according to Embodiment 2.

[0022] FIG. 6(a) shows an example of a configuration seen obliquely from above the guide bush, and FIG. 6(b) shows an example of a configuration of the side surface of the guide bush. Further, FIG. 6(c) shows an immediate cross-section of the guide bush. The guide bush 30 shown in FIG. 6 is provided in a cylindrical shape and has a bandage groove 17 provided in a bandage shape with an oil groove around it.

[0023] In Embodiment 2, as shown in FIGS. 6 and 7, after the grease is drawn in from the grease drawing-in port 4 by the mold opening of the mold device 200, the grease flows into the guide bush 30 through the bandage groove 17 of the guide bush 30 and through the conical holes 31 opened at arbitrary positions. In Embodiment 2 (FIGS. 6 and 7), four conical holes 31 are provided every 90°, but the angular intervals can be arbitrarily set, whether they are equally spaced or otherwise.

[0024] Even with this configuration, the grease is spread in by repeatedly opening and closing the mold, but because a conical hole 31 is provided, the grease can be drawn in from all directions, making it possible to spread the grease in the headband-shaped grease groove.

[0025] As described above, according to this embodiment 2, in a structure in which grease is spread by repeatedly opening and closing the mold device 200, the grease can be spread through the headband-shaped groove, making it possible to draw in grease from all directions.

[0026] <Example 3> Embodiment 3 of the present invention will be described below with reference to Figure 8. Figure 8 is a configuration diagram showing an example of a grease supply section using a solenoid valve according to Embodiment 3.

[0027] In this third embodiment, as shown in Figure 8, a solenoid valve 18 is installed in the movable part 101B of the mold device 300. The mold device 300 adjusts the vacuum state inside the guide bush by opening and closing the vacuum adjustment hole 19 in accordance with the mold opening operation under the control of the solenoid valve 18, thereby adjusting the amount of grease drawn in by negative pressure. This makes it easy to adjust the amount of grease drawn in, and also makes it possible to adjust it so that grease is drawn in only once every few times.

[0028] As explained above, according to this embodiment 3, not only can the amount of grease drawn in be easily adjusted, but it is also possible to adjust it so that grease is drawn in only once every few times.

[0029] According to the embodiments described above, the method can be applied to supplying grease to, for example, ball screw mechanisms provided in injection units and mold closing units, and toggle pins of toggle link mechanisms that operate when opening and closing molds, and is suitable for use in parts that require periodic grease supply. [Explanation of symbols]

[0030] 1 Grease Tank 2 O-rings 3. Grease injection groove 4. Grease intake 5. Bolts for mounting the mold 6. Grease dispenser cover 7 Guide bush 8 guide pins 9 Fixed mounting plate 10 Fixed template 11 Movable formwork 12 Spacer Blocks 13. Movable side mounting plate 14. Protruding plate (top) 15. Protruding plate (bottom) 16 Molded products 17 Headband groove 18 Solenoid valve 19 Vacuum adjustment hole 30 Guide bushings 31 Cone-shaped hole 100 mold equipment 101A Fixed part 101B Moving part 200 mold equipment 300 mold equipment

Claims

1. A mold apparatus having a fixed part and a movable part, A guide bushing provided on the movable part, A guide pin is provided in the fixed part and slides within the guide bush during the mold opening operation of the mold device, A grease tank having a sealed structure for storing grease and a grease intake port for supplying the grease to the guide bush, Equipped with, A mold apparatus having a structure that, when the guide pin is removed from the guide bush in conjunction with the mold opening operation of the mold apparatus, the negative pressure generated inside the guide bush draws the grease from the sealed grease tank through the grease intake port into the guide bush and flows it into the sliding portion between the guide pin and the guide bush.

2. A mold apparatus according to claim 1, characterized in that the bottom surface of the grease tank is inclined downward toward the grease intake port.

3. A mold apparatus according to claim 1, characterized in that the grease tank is attached to the movable part.

4. A mold apparatus according to claim 1, characterized in that the guide bush has a headband groove on its outer circumference and a plurality of holes in the headband groove.

5. A mold apparatus according to claim 4, characterized in that each hole provided in the headband groove is arranged in a conical shape.

6. The mold apparatus according to claim 4, characterized in that the plurality of holes provided in the headband groove are arranged at equal intervals along the outer circumference of the guide bush.

7. A mold apparatus according to claim 1, characterized in that a solenoid valve is provided in the movable part, a vacuum adjustment hole is provided between the solenoid valve and the guide bush, and the solenoid valve controls the negative pressure inside the guide bush using the vacuum adjustment hole.

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