JPH0667011U - Shutter device for vacuum press - Google Patents

Abstract

(57) [Abstract] [Purpose] By providing a new shutter device that can reliably hold the vacuum state inside the chamber and can automatically open and close depending on the temperature, the laminated product after vacuum release The high temperature hot air inside the chamber of the vacuum press due to the pressing and heating of the main body is eliminated, damage to the equipment inside the main body is prevented, and the set temperature inside the main body is easily maintained. [Structure] Chamber 23 having heating press device 1 inside
A shutter body 39 for opening and closing the opening 31 formed in the top cover 23a, a driving means 2 for opening and closing the shutter body 39, and a temperature detecting means 3 for detecting a predetermined temperature range provided in the chamber 23. The drive means 2 is opened and closed by a detection signal from the temperature detection means 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vacuum press used for manufacturing a multilayer printed circuit board or the like, and more particularly to a shutter device for letting out hot air inside the vacuum press to the outside.

[0002]

[Prior art]

 In general, the shutter device of a vacuum press is installed in front of the vacuum press chamber to open the chamber when loading and unloading the laminated product on the hot plate and to close the chamber when the laminated product is clamped. Therefore, it is operated by a pneumatic device or the like.

By the way, the conventional vacuum press is operated as shown in the schematic graph of FIG. In this graph, the horizontal axis T indicates the passage of time, the vertical axis S indicates the start of pressing, and the vacuum degree, the pressure, and the temperature are plotted, and the polygonal line a indicates the vacuum degree inside the vacuum press chamber. The polygonal line b shows the pressure on the laminate, and the polygonal line c shows the temperature of the hot plate on the laminate. When the vacuum press starts operating, the vacuum is first drawn. When the internal degree of vacuum reaches a predetermined degree of vacuum, the pressing of the laminated product is started simultaneously with the heating of the laminated product by the hot plate. After a predetermined time, the vacuum is released, and then the pressing and heating are continued until the laminated product is completed. During this time, the chamber is sealed by a shutter device, and the inside of the chamber is filled with high-temperature hot air due to heating of the air and the gas released from the laminate. This high-temperature hot air may damage equipment installed inside the chamber, and may easily cause the internal temperature of the main unit to rise above the set temperature, causing problems such as adversely affecting laminated products. It was

[0004]

[Problems to be solved by the device]

 Therefore, an object of the present invention is to provide a new shutter device that can reliably maintain the vacuum state inside the chamber and can automatically open and close depending on the temperature. The purpose of this is to eliminate the filling of high temperature hot air inside the chamber of the vacuum press due to clamping and heating, to prevent damage to the equipment inside the main body, and to easily maintain the set temperature inside the main body.

[0005]

[Means for Solving the Problems]

 To achieve the above object, a vacuum press shutter device according to the present invention has a shutter body for opening and closing an opening formed in a top cover of a chamber having a heating press device therein, and a shutter body for opening and closing the shutter body. The driving means and the temperature detecting means for detecting a predetermined temperature range provided in the chamber are provided, and the driving means can be opened / closed by a detection signal of the temperature detecting means.

[0006]

[Action]

 With the above configuration, when the vacuum in the chamber of the vacuum press is evacuated and the pressing and heating of the laminated products are started, the shutter main body is driven by the driving means to open the opening formed on the top cover of the chamber. Close your mouth.

Further, when high temperature hot air is filled by pressing and heating the laminated product and the inside of the chamber of the vacuum press rises to a predetermined temperature or higher, the driving means is switched by the detection signal of the temperature detection means and the shutter body is opened. Driven to open the opening and release hot hot air.

When the opening port is opened to release high temperature hot air and the temperature in the chamber drops to a predetermined temperature or lower, the driving unit is freed by the detection signal of the temperature detection unit, and the shutter body closes the opening port.

The temperature detecting means is protected from the radiant heat of the heating press device by being covered with the heat insulating material and provided on the lower surface of the top cover, and detects the temperature of the atmosphere convection in the chamber to detect this detection signal. The drive means can be opened and closed by switching.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. First, the configuration of the heating press device 1 will be briefly described. In FIG. 4, 10 is a bed, on which a cylinder plate 12 of a cylinder unit 11 is fixed, and an upper plate 13 is arranged above the cylinder plate 12. The cylinder plate 12 and the upper plate 13 are connected by four tie rods 14. Further, the cylinder unit 11 is provided with a ram 15 which is vertically expandable and contractable, and a movable plate 16 is mounted on the ram 15. A heat plate 18 is integrally fixed to the movable plate 16 with an insulating material 17 sandwiched therebetween, and a plurality of heat plates 19 are provided above the heat plate 18 on a locking tool not shown in the drawing. The part is placed and locked. Further, just under the upper plate 13, the insulating material 20 and the heating plate 21 are integrally locked like the other heating plates 19. Reference numeral 22 denotes a heat medium manifold for supplying / discharging the heat medium to / from a passage formed in the heat plate via a flexible tube not shown in the drawing.

As shown in FIG. 3, the above-mentioned components except the manifold 22 are vacuum-pressed with the periphery thereof being shielded by the chamber 23. In addition, a front opening of the chamber 23 is provided for loading and unloading laminated products, and a shutter device 24 that can be opened and closed is provided in this opening. In this shutter device 24, a retractable tip portion 27 of an air cylinder 26 is fixed to the central portion of a shutter body 25, and the left and right ends of the shutter body 25 are guided by guide members 28 and 28, respectively. The shutter device 24 shown in FIG. 3 shows a state in which the chamber 23 is opened. To close the chamber 23, the air cylinder 26 is extended and the shutter body 25 is guided upward by the guide members 28, 28. Done. Reference numeral 29 is a viewing window, and reference numeral 30 is an upper shutter device for discharging high temperature hot air in the chamber described later to the outside.

The upper shutter device 30 will be described with reference to FIGS. 1 and 2. The top cover 23a of the chamber 23 has a generally square opening 31. A base plate 32 is fixed on the top cover 23a adjacent to one side of the opening 31. At the center of the base plate 32, an L-shaped bracket 33 for supporting the drive means 2 is erected. The length of each side of the L-shaped bracket 33 is set equal to the width of the base plate 32, and one side of the L-shaped bracket 33 is fixed so as to match the long side of the base plate 31 on the opening side. .

Further, a first mounting member 34 is fixed to the opening side of the upper portion of the L-shaped bracket 33, and a base portion 36 of a cylinder 35 as a driving means 2 is swingably attached to the first mounting member 34. A second mounting member 38 is swingably attached to the rod tip portion 37 of the cylinder 35, and an upper shutter body 39 is fixed to the second mounting member 38. Further, two loose fitting members 40, 40 are arranged so as to be bridged from the upper shutter body 39 to both longitudinal ends of the base plate 32. At this time, the portions 40a, 40a of the loose fitting members 40, 40 on the upper shutter body 39 are fixed to the upper shutter body 39, and the other portions, that is, the portions 40b extending from the upper shutter body 39 to the base plate 32 side. , 40b is in an unfixed state. Further, long holes 41 that are long in the vertical direction are formed in the non-fixed portions 40b, 40b of the loose fitting members 40, 40, respectively.

Further, the holding members 42, 42 are erected at both ends in the longitudinal direction of the base plate 32 so as to contact the non-fixed portions 40b, 40b of the loose fitting members 40, 40, and the loose fitting members 40, 40 are held. The bolts 43, 43 protruding from the shafts 42, 42 are loosely fitted to the outer peripheries of the elongated holes 41, 41 in a state where the bolts 43, 43 are allowed to move only vertically. In this case, the holding members 42, 42 and the L-shaped bracket 33 are formed as separate bodies, but they may be formed as one body.

A flange member 23b is provided on the top cover 23a along the opening 31, and the lower surface of the upper shutter body 39 is in contact with the upper end of the flange member 23b. Further, the packing 45 is arranged over the entire outer circumference of the collar member 23b. The thickness of the packing 45 under no load is set to be about 30% larger than the height of the collar member 23b extending upward from the upper surface of the top cover 23a. Therefore, when the lower surface of the upper shutter main body 39 comes into contact with the upper end of the collar member 23b, about 30% of the thickness of the packing 45 under no load is crushed, so that the space between the upper shutter main body 39 and the top cover 23a is crushed. Can be reliably sealed.

As shown in FIG. 1, on the lower surface of the upper shutter body 39, a heat insulating material 48 is provided as a temperature detecting means 3 via a heat insulating material supporting member 48 a, and the heat insulating material 48 covers the upper surface of the upper insulating body 48. A thermometer with a contact 49, which sets the temperature and the lower limit temperature, is provided. The upper and lower limit temperatures can be set arbitrarily. When the upper limit contact of the contact thermometer 49 turns on, the energization of the solenoid valve 50 is automatically cut off and compressed air is supplied to the head side of the cylinder 35, and at the same time, the air on the rod side is discharged to the atmosphere and the air cylinder Extends and closes the upper shutter body 39. On the contrary, when the lower limit contact is turned on, the solenoid valve 50 is automatically energized to supply the compressed air to the rod side 37 of the air cylinder 35 and simultaneously release the compressed air on the head side to the atmosphere. Therefore, the air cylinder 35 retracts to open the upper shutter body 39. The upper shutter body 39 is normally closed in the normal state and is opened only when the upper limit contact is on. Also, in the normal state, compressed air is always supplied to the 35 head side of the air cylinder, and the shutter main body 39 is firmly brought into close contact with the opening 31 to prevent vacuum decompression failure (it is not decompressed if there is a small gap at the beginning). is doing. A filter 52, a regulator 53, and a luplicator 54 are provided between the air pressure source 51 and the solenoid valve 50, and a flow control valve 55 with a check valve is provided between the solenoid valve 50 and the air cylinder 35. It is installed. The contact thermometer 49 is protected from radiant heat from the hot plates 18, 19, 20 and the like of the heating press device 1 by being covered with the heat insulating material 48, detects the temperature of the atmosphere convection in the chamber 23, and detects the solenoid. The valve 50 switches extension / retraction of the air cylinder 35 of the drive means 2.

Next, the operation of the vacuum press configured as described above will be briefly described. First, as shown in FIG. 3, with the shutter main body 25 of the shutter device 24 lowered and the chamber 23 opened, for example, by a loader, the laminated product is placed on each of the heating plates 18 and 19. Next, the air cylinder 26 of the shutter device 24 is extended, the shutter main body 25 is guided by the guide members 28, 28 and ascends, and the chamber 23 is closed. Then, a vacuum motor (not shown) is operated to raise the degree of vacuum inside the chamber 23 to a predetermined level. Next, the heat medium is supplied to the passages in the respective heating plates 18, 19, 21 via the manifold 22 to heat the respective heating plates. At the same time, the cylinder device 11 is operated, the ram 15 is extended, the movable plate 16 is raised, and the laminated products are clamped by the respective heat plates 18, 19, 21. As described above, the vacuum is opened after a predetermined time, the supply of the heat medium is stopped, the pressing of the laminated product is stopped, and the heating plates 18 and 19 are moved to the positions shown in FIGS. To return. Then, the shutter main body 25 is lowered to open the chamber 23, and the stacked product is taken out by an unloader or the like, and a series of operations is completed.

When the vacuum press is started to evacuate the chamber to press and heat the laminated material, the opening port provided in the top cover of the chamber is closed as follows. When the rod of the cylinder 35 is extended from the state shown by the broken line in FIG. 1, the shutter body 39 is projected from the holding members 42, 42 and the long holes 41, 41 of the loose fitting members 40, 40 are removed. With the piercing bolts 43, 43 as the fulcrum, the free end of the bolts 43, 43 rotates in the counterclockwise direction in FIG. 1 and contacts the upper end of the collar member 23b of the top cover 23a. At this time, although the free end of the upper shutter main body 39 is in contact with the flange member 23b, the pressing force of the cylinder 35 concentrates on the free end side of the upper shutter main body 39, so the holding member 42 of the upper shutter main body 39, The side of 42 is lifted, and a slight gap is formed between it and the collar member 23b.

When the cylinder 35 is further extended in this state, the free end of the upper shutter body 39 is already in contact with the upper end of the collar member 23b, and the loose fitting member 40 on the opposite side of the free end. Since the lateral movements of 40, 40 are restricted by the bolts 43, 43, the upper shutter body 39 rotates clockwise in FIG. 1 with this abutting portion as a fulcrum. Therefore, the long hole 41 moves downward with respect to the bolt 43, and the upper shutter body 39 on the holding member 42 side also contacts the upper end of the collar member 23b. In this way, the entire upper shutter main body 39 is uniformly pressed against the upper end of the flange member 23b of the top cover 23a, and, together with the function of the packing 45, the opening 31 is surely secured as shown by the solid line in FIG. Can be sealed in.

When the degree of vacuum inside the chamber reaches a predetermined degree of vacuum, the heating and pressing and heating of the laminated product are started, and after a predetermined time elapses, the vacuum is released and the pressing and heating are continued until the completion of the laminated product. . When these vacuum presses are repeatedly performed, the air and the gas released from the laminated product are heated in the chamber, and a high temperature hot air is filled. When the temperature inside the chamber exceeds the set upper limit temperature, the solenoid valve is switched by the thermometer with contacts and the air cylinder retracts, opening the shutter body in the reverse order of the closing procedure described above. The high temperature hot air is discharged from the opening, and the temperature inside the chamber drops.

When the temperature inside the chamber 23 falls below a predetermined lower limit temperature due to the opening of the opening, an electric signal is automatically output to turn off the solenoid valve 50 so that the air on the rod side of the air cylinder 35 is cut off. Is released into the atmosphere. At the same time, by supplying compressed air to the head side of the air cylinder 35, the rod tip of the cylinder 35 advances, and the shutter body 39 with the rod tip axially supported moves the bolt 43 of the loose fitting member 40. The opening 31 is closed by rotating the opening 31 as a fulcrum. Incidentally, the opening port 31, the laminate is closed by an upper shutter device 30 before you supplied into the chamber 23, at a vacuum opening ends during heating, it is open at the time indicated by O ₁ of FIG. 6, for example, O ₂ It is held until the time indicated by.

As described above, since the opening port 31 is formed in the top cover 23a of the chamber 23 and the opening and closing of the opening port 31 can be performed arbitrarily by the upper shutter device 30, the high temperature hot air inside the chamber 23 is prevented. This can be easily performed to the outside, and a reliable seal can be maintained even when the chamber 23 is in vacuum.

The opening size can be freely set by changing the stroke of the cylinder 35. It is also possible to provide reed switches at both ends of the cylinder 35 to check the position of the upper shutter main body, and to take an interlock such as preventing the vacuum pump from starting when the shutter main body is opened. Further, in the above embodiment, only one opening is formed in the top cover of the chamber and only one set of the upper shutter device is provided.However, in the case of a large vacuum press, a plurality of opening is formed. It is possible to effectively eliminate the high temperature hot air filling inside the chamber by providing the upper shutter devices in the number corresponding to the above. Therefore, it is possible to prevent damage to the devices and the like provided inside the chamber due to heat. In addition, it is especially effective to apply the above-mentioned opening and upper shutter device to a vacuum press dedicated to heating.

[0024]

[Effect of device]

 As is clear from the above description, the shutter device for a vacuum press is provided with temperature detecting means for detecting a predetermined temperature range in the chamber, and the shutter body is opened / closed by a signal from the temperature detecting means. Therefore, it is possible to easily and automatically eliminate the filling of high temperature hot air inside the chamber due to the pressing and heating of the laminated products after the vacuum inside the chamber is released, and it is possible to prevent damage to the equipment inside the main body. The set temperature inside the main body can be easily maintained.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of that of FIG.

FIG. 3 is a front view of a vacuum press.

FIG. 4 is an explanatory view showing the vacuum press of FIG. 3, particularly the inside thereof.

FIG. 5 is a schematic system diagram of the present invention.

FIG. 6 is a graph showing changes in vacuum degree of vacuum press, temperature, and pressure applied to a laminated product.

[Explanation of reference numerals] 1 heating press device 2 driving means 3 temperature detecting means 23 chamber 23a top cover 30 upper shutter device 32 base plate 33 bracket 35 air cylinder 39 upper shutter body 40 loose fitting member 41 long hole 42 holding member 43 bolt 45 packing 49 Thermometer with contacts 50 Solenoid valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29L 31:34

Claims (1)

[Scope of utility model registration request] 1. A shutter main body for opening and closing an opening formed in a top cover of a chamber having a heating press device therein, and a drive means for opening and closing the shutter main body.
A shutter device for a vacuum press, comprising: a temperature detection unit provided in a chamber for detecting a predetermined temperature range, and the drive unit being opened and closed by a detection signal of the temperature detection unit.