JPH0362655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive support device for a mold, and in particular, it transports heat-softened glass to be formed between upper and lower molds, and transports the glass to be molded through the upper and lower molds. The present invention relates to a drive support device for a mold in a glass lens molding apparatus that molds lenses by pressing.

[Prior Art] A driving support device for a mold of this type has conventionally been constructed as shown in FIG. 5. That is, in the figure, 1 indicates the device base, and this device base 1
A cover 3 that defines a molding chamber 2 is erected above, and an upper plate 4 is fixed to the upper surface of the cover 3.
A fixed mold part (upper mold part) 5 is fixed to the lower surface of the upper plate 4 (ie, the ceiling surface of the molding chamber 2). The fixed mold part 5 has a fixed base 6 fixed to the lower surface of the upper plate 4.
, an upper mold 8 that fits into a tapered fitting part 7 formed on the lower surface of the fixed base 6, a retaining ring 9 for fixing the upper mold 8 to the fixed base 6, and a retaining ring 9 for fixing the upper mold 8 to the fixed base 6. It is composed of a heater 10 for heating the mold 8. A lower mold 11 paired with the upper mold 8 is disposed at a lower position on the axis of the upper mold 8,
This lower mold 11, like the upper mold 8, is fixed via a retaining ring 12 to a movable base 13 for supporting the lower mold. Reference numeral 14 indicates a heater for heating the lower mold 11, and the lower mold 11, retaining ring 12, movable table 13, and heater 14 constitute a movable mold part (lower mold part) 15. It's summery. The movable mold part 15 is fixed to the upper end of a cylindrical movable mold holding shaft 18 that is fitted into the housing part 16 of the base 1 via a ball retainer 17 so as to be slidable in the vertical direction. , is configured to be freely movable in the vertical direction, that is, in the direction toward and away from the fixed mold part 5, through the sliding movement of the movable mold holding shaft 18. A rotary actuator 20 equipped with a cam roller 19 is disposed inside the base 1.
9, the movable mold holding shaft 18 can be slidably driven in the vertical direction.

An opening 21 is formed in the side surface of the cover 3 forming the molding chamber 2, and a transport arm 23 carrying a glass 22 to be molded thereon can go in and out through the opening 21. 24 is the carrier. The transport arm 23 carries the glass to be formed 2
A cylinder (not shown) in a transfer arm drive unit 25 fixed on the base 1 is used to transfer the carrier 24 on which the mold 2 is placed between the upper and lower molds 8 and 11 in the molding chamber 2. It is now possible to move forward and backward through the .

According to the above configuration, the glass 22 to be formed is transported between the upper and lower molds 8 and 11 in the molding chamber 2 via the carrier arm 23, and the glass 22 to be molded is transferred to the lens of a predetermined shape via the upper and lower molds 8 and 11. It can be press-molded.

[Problems to be Solved by the Invention] However, the above conventional configuration has the following problems.

That is, during the molding process, the upper and lower molding dies 8, 11 are heated to around the transition point temperature of the glass via the heaters 10, 14, so the temperature inside the molding chamber 2 rises to around the temperature that deforms the glass 22 to be molded. ing. For this reason, the upper part of the movable mold holding shaft 18 that fixedly holds the movable mold part 15 is heated, and the upper part of the movable mold holding shaft 18 is deformed due to thermal expansion.
Due to this thermal deformation, the sliding resistance of the ball retainer 17 becomes extremely large, which prevents the movable mold holding shaft 18 from smoothly sliding, thereby preventing smooth operation in the molding operation. In this case, a configuration has been considered in which the thermal expansion during molding is predicted and the sliding part is given play in advance. There were problems such as misalignment with respect to the mold 8 and falling of the ball retainer 17. Therefore, in the above conventional configuration, the upper and lower molds 8, 1
It has been extremely difficult to always smoothly slide the movable mold holding shaft 18 without causing any misalignment.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to prevent misalignment between the upper and lower molds at both low and high temperatures, and to enable smooth operation of the movable mold at all times. An object of the present invention is to provide a driving support device for a molding die.

[Means for Solving the Problems] The present invention provides four bearings each in at least the upper and lower portions of a housing fixedly held on a device base, and also measures the dimensions between the bearing surfaces of each of the four bearings. A movable mold is fixed to one end of a movable mold holding shaft which is configured to be adjustable and is slidably supported in the axial direction via the bearing, and the movable mold holding shaft is formed hollow; The structure is such that a cooling medium can be supplied into and discharged from the hollow portion.

[Function] In the above configuration, when the cooling medium is supplied into the hollow portion, the movable mold holding shaft is cooled. Furthermore, by adjusting the dimensions between the corresponding bearing surfaces, it is possible to eliminate misalignment of the movable mold with respect to the fixed mold.

[Example] Hereinafter, an example of the present invention will be described in detail using the drawings. In addition, in the following explanation, the fifth
The same members as those shown in the figures are given the same reference numerals, and their explanations will be omitted.

FIG. 1 is a front view showing a mold drive support device 30 according to the present invention, and FIG. 2 is a front sectional view of the main part of FIG. 1. As shown in the figure, the drive support device 30 for the movable mold section 15 includes a movable mold holding shaft 31 that fixedly supports the movable mold section 15, and a movable mold holding shaft 31 that fixedly supports the movable mold section 15.
A cooling medium (e.g., tap water) is supplied and discharged into a housing 33 that supports the housing 33 so as to be slidable in the axial direction via a bearing (rolling bearing) 32, and a hollow part (cavity part) 34 of the movable mold holding shaft 31. It is composed of a cooling medium supply and discharge device 35, etc.

As shown in FIG. 3, the housing 33 is a housing forming member 3 having a dogleg-shaped cross section (L-shape).
3a and 33b are joined as a pair and formed into a substantially rectangular cross section, and a spacer 36 is interposed at each joint surface. housing 3
A flange portion 33c is formed on the upper surface of the housing 3, and the housing 33 is fixedly held in a suspended state from the base 1 via the flange portion 33c. The axial center of the housing 33 is set to be the same as the axial center of the upper mold 8, and the movable mold holding shaft 31 is inserted into the housing 33.

Four bearings 32 are disposed on at least the upper and lower surfaces of the inner surface of the housing 33, respectively. As shown in FIG. 3, each of the four bearings 32 has a rectangular cross section (square tubular shape) inserted into the housing 33.
The bearings 32 and
One of the bearings 32 is configured so that the dimension between mutually opposing bearing surfaces can be adjusted.
That is, the bearing 32 on one side of the mutually opposing bearings 32, 32 is fixed to the mounting seat 39 of the housing 33 via the two adjustment members 37, 38, and the adjustment members 37, 38 have a shape. Tapered surface 37
The adjustment members 37 and 38 are slid by the actions of the a and 38a to adjust the dimension between the mutually opposing bearing surfaces. Reference numeral 40 indicates holes for disposing the adjustment members 37 and 38, reference numeral 41 indicates a fixing screw, and reference numeral 42 indicates a long hole as an adjustment allowance.

The movable mold holding shaft 31 is supported so as to be slidable in the axial direction via four bearings 32 arranged on the upper and lower inner surfaces of the housing 33, and the shaft center portion thereof is formed hollow. be. The hollow part 34 is formed up to the vicinity of the support surface of the movable mold part 15, and the hollow part 34
4 is configured so that a cooling medium is supplied through a supply port 43. Further, a discharge tube 44 having an open upper part is inserted into the hollow part 34, and is configured to discharge the cooling medium in the hollow part 34. Each supply port 43, discharge tube 4
4 is connected to a cooling medium supply and discharge device 35, and the hollow part 34 is connected to the cooling medium supply and discharge device 35 through this supply and discharge device 35.
The structure is such that a cooling medium can be supplied and discharged from the inside.

Near the middle part of the housing 33 in the vertical direction,
A rotation regulating mechanism section 45 is provided for regulating the rotation of the movable mold holding shaft 31 when the lower mold 11 is replaced. The rotation regulating mechanism section 45 is connected to the movable mold holding shaft 3
1, two (not limited to two) cam followers 47, 47 installed on the fixing member 46, and each cam follower 47, 47.
cam follower 47, 47 and rails 48, 48 for guiding and supporting the cam follower 47, 47
Rotation of the movable mold holding shaft 31 is regulated by the cooperative action of 8 and 48.

Next, the operation based on the above configuration will be explained.

The glass to be formed 22 carried between the upper and lower forming molds 8 and 11 via the transfer arm 23 is transferred to the heater 10,
The upper and lower molds 8 and 1 are heated through the
1 into a predetermined shape. During molding, the lower mold 11 is connected to the rotary actuator 20.
It is moved upward via a movable mold holding shaft 31 which is moved up and down via a cam roller 19, and performs molding in cooperation with the upper mold 8. Movable mold holding shaft 31
Since it is held via a bearing 32 provided in the housing 33, smooth vertical movement is achieved. Also, during molding, the upper part of the movable mold holding shaft 31 is heated, but the hollow part 3 of the movable mold holding shaft 31
Since a cooling medium is supplied into the movable mold holding shaft 31, the movable mold holding shaft 31 will not undergo thermal expansion. Therefore, there is no situation in which the movable mold holding shaft 31 does not operate smoothly due to thermal expansion, unlike in the prior art, and smooth operation is always ensured.

Further, since the dimensions between the mutually opposing bearing surfaces of the bearings 32 that support the movable mold holding shaft 31 can be adjusted, the sliding state of the movable mold holding shaft 31 can be adjusted to the smoothest state. In addition, bearings 32 are installed at two locations, upper and lower.
The optical center (axis center) will not go out of alignment.

Further, as described above, even if the atmosphere near the upper part of the movable mold holding shaft 31 rises to around the transition point temperature of the glass, the bearing 32 and the holding shaft 31 will not be affected by the action of the cooling medium in the hollow part 34. Since thermal expansion is limited as much as possible, good sliding action is always ensured even if conditions such as the type of glass and molding temperature change.

In the above configuration, the movable mold holding shaft 31 and the housing 33 are formed to have a rectangular cross section, but the configuration is not limited to this, and for example, each corner may be formed with roundness. Of course, they may be configured in the same manner.

[Effects of the Invention] As described above, according to the present invention, the movable mold can always be operated smoothly without being affected by the glass molding temperature in the glass molding apparatus, and the upper and lower molds 8 and 11 can be operated smoothly. It is possible to maintain the axes concentrically, and the molding conditions can be made extremely good.

[Brief explanation of drawings]

Fig. 1 is a front view of the device according to the present invention, Fig. 2 is a front sectional view of the main part thereof, Figs. FIG. 2 is a partially cutaway front view showing the configuration. DESCRIPTION OF SYMBOLS 1...Base, 8...Upper mold, 11...Lower mold, 31...Movable mold holding shaft, 32...Bearing, 3
3...Housing, 34...Hollow part, 35...Cooling medium supply and discharge device.

Claims (1)

[Scope of Claims] 1. Four bearings are provided in at least the upper and lower parts of the housing fixedly held on the device base, and the dimensions between the bearing surfaces of each of the four bearings are adjustable, and the A movable mold is fixedly mounted on one end of a movable mold holding shaft that is slidably supported in the axial direction via a bearing, and the movable mold holding shaft is formed hollow, and a cooling medium is provided in the hollow portion. supply,
A driving support device for a mold, characterized in that it is configured to be able to be discharged. 2. Claim 1, wherein the housing includes a pair of flange forming members each having a dogleg shape in cross section, and a spacer interposed at a joint portion of the pair of flange forming members. A drive support device for the mold described in Section 1. 3. The mechanism for adjusting the dimension between the bearing surfaces of the bearing is composed of two pieces of bearing support members each having a tapered surface that can freely slide on each other,
2. The mold drive support device according to claim 1, wherein the dimension between the bearing surfaces can be adjusted by sliding the tapered surfaces of the two bearing support members. 4. The movable mold holding shaft has a cam follower that engages with the fixed part of the housing, and rotation of the movable mold holding shaft is regulated through engagement between the cam follower and the housing fixed part. 2. The mold drive support device according to claim 1, wherein the mold drive support device is configured to 5. Claim 1, characterized in that the hollow part of the movable mold holding shaft has a cooling medium supply port in its lower part, and a discharge tube having an opening in its upper part is inserted therein. A drive support device for the mold as described. 6. The mold drive support device according to claim 5, wherein the cooling medium supply port and discharge tube are connected to a cooling medium supply and discharge device.