JPH02162014A - Temperature controlling mechanism of frame of forming device equipped with cutting blade for trimming - Google Patents

Abstract

PURPOSE:To prevent the difference between the thermal expanded amounts of a first and a second cutting blades from developing by a constitution wherein temperature controlling water paths and trimming parts, in which temperature sensors to detect the temperatures of the paths are provided, are formed in respective forces and mounting members of the respective forces so as to control the environmental temperatures of the first and the second cutting blades by means of the respective temperature sensors. CONSTITUTION:Paths 51 and 52 are provided in a mold (or a bottom force 13 and a top force 24). Paths 53, 54 and 55 are provided also in a bottom base 7, a ram 8 and a top base 9, all of which compose a mounting member 10. Temperature sensors 51a 55a consisting of thermocouples are imbedded so as to bring close to the respective paths. Hoses are connected to the paths 51 and 52 of the bottom force 13 and top force 24 for the circulation of cooling water or hot water. Hoses are connected also to the paths 53 - 55 for the circulation of cooling water and hot water. The temperatures of the temperature sensors 51a - 55a are set to be 35 deg.C. Signal is emitted at said set temperature so as to stop the circulation of cooling water or hot water in the path. Thus, the optimum temperatures for holding the trimming accuracies of the first and the second cutting blades can be controlled.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a temperature adjustment mechanism for a molding machine frame equipped with a mold having a trimming blade, and the present invention relates to a temperature adjustment mechanism for a molding machine frame equipped with a mold having a trimming knife, and the present invention relates to a temperature adjustment mechanism for a molding machine frame equipped with a mold having a trimming knife, and the temperature adjustment mechanism controls not only the lower mold and the upper mold but also their mounting members to a certain temperature. The clearance accuracy suitable for trimming between the first cutting blade and the second cutting blade can be maintained by automatically adjusting the clearance.

(Prior art) A mold such as a lower mold having a ttS1 cutting blade at its mouth, and a mold 2 having a second cutting blade that works together with the first cutting blade to trim the 01 fat sheet. It is known to be used in a molding device that performs trimming at the same time as molding. But the first
The allowable press precision clearance between the cutting blade and the second cutting blade is very small, and if the press precision is not good, the installation of these cutting blades has the drawback of making the mold unusable early.

However, these molds are affected by the heat of the resin sheet, and the lower mold and upper mold are not affected by the same degree of heat, so cooling is applied to each mold to keep the coefficient of thermal expansion almost constant. The temperature is adjusted by passing water or hot water so that the temperature is the same especially around the PJ1 cutting blade and the second cutting blade, but the temperature of the mold mounting parts and the molding equipment frame is not adjusted to 33I, so the mold and frame creating a thermal expansion difference between the sides,
It has the disadvantage of shortening the useful life of the mold.

(Problem to be solved by the invention/objective of the invention) Molding and trimming are done in the same way in a molding device! What I do is
0 (This is to prevent slippage, breakage, or cracking if trimming is performed after cooling depending on the material of the fat sheet.

However, when we investigated the cause of the early failure of precision despite taking measures to maintain the press precision of the first and second cutting blades as described above, we found that the In the middle direction, the difference between the internal temperature of the frame and the temperature of the lower mold and the upper mold becomes large, causing a difference in thermal expansion of different rates between the first cutting blade and the second cutting blade, and the automatic temperature control device is activated. It was found that this did not work as expected, regardless of whether it was set up or not. Based on this knowledge, the present invention has been developed by fixing both ends of the lower mold and upper mold to the frame in order to attach the knockout members important for molding (1 ton), or by attaching the mounting members provided so as to be able to slide freely. The first purpose is to provide a device that makes the fjS2 substantially constant, and to prevent a difference in thermal expansion between the fjS2 cutting blades.

(Means for Solving the Problems) The present invention meets the above objects, and includes a mold having a first cutting blade at its mouth, and a resin sheet that is trimmed together with the first cutting blade. In a resin sheet molding device, a mold having a second cutting blade and a mounting member for respectively supporting the mold are fixedly or slidably provided on the molding device frame,
Each mold and the mounting member of each mold constitute a trimming section in which a temperature-controlled water passage and a temperature sensor for detecting the temperature of the passage are installed, and the environmental temperature of the first and second cutting blades is detected by each temperature sensor. A temperature adjustment mechanism for a molding device frame equipped with a mold having a trimming cutting blade, characterized in that the temperature adjustment mechanism is controlled by the following: to prevent a difference in thermal expansion between the trimming portion of the molding device frame and the first and second cutting blades. Accordingly, the sharpness of trimming is maintained for a long time, and the useful life of the mold pair is extended.

(Example) A preferred embodiment of the invention will now be described.

Figure #4 shows an example of the resin sheet molding machine 1 for carrying out the present invention, which includes a resin sheet extrusion block 1, a molding device (■),
The stack device (1) is arranged on a line.

For extrusion of 0I fat sheet, ■ sends the raw material 0I fat from the hopper 2 to the extrusion cylinder 3 equipped with a screw and heating VTR 11, extrudes the required resin sheet C from the T die 4, passes through the cooling roll device 5, and sends it to the molding device (■). send.

The edge of the resin sheet C is clamped with a known crumb chain and sent to the molding device (2). ! (not shown), followed by placing a lower base 7 and a ram 8 on the lower side of the resin sheet C, and placing an upper base 9 on the upper side of the resin sheet C, thereby using the mounting member of the present invention. 10 constitutes a trimming section 12.

The mounting member 1° consisting of the lower base 7 and the upper base 9 has both ends fixed to pillars 11 on both the left and right sides of the frame 6, and the mounting member 10 consisting of the ram 8 has both ends slidable up and down on the pillars 11. to fit.

A lower die 13 is attached to the ram 8. In this embodiment, the lower mold 13 is a female mold for molding a cup-shaped product P, and a first cutting blade 14 is provided on the outer periphery of the mouth, and the center of the lower mold is directed toward the lower base 7 below the ram 8. The knockout rod 15 is fixed. The lower mold 13 is provided with a knock-out mold 16 that forms a bottom mold when raised to the molding device together with the ram 8,
A knockout bottle 17 is projected downward from the knockout mold 16 and comes into contact with the knockout rod 15.

A downward cylinder 21 is attached to the upper base 9, an assist plug 23 protruding toward the lower die 13 is fixed to the rod 22 of the cylinder, and an upper die 24 of a cylindrical channel type is attached around the plug 23. The upper die 24 is provided with a second cutting blade 25 which cooperates with the first cutting blade 14 to trim the resin sheet C by a slight fit.

31 is a suction vtra, and when the lower die 13, which has been formed and trimmed, descends together with the ram 8 and knocks out the Kenppin P upward, the discharge position f! The product P is moved from f(i) to the trimming position (ii), and the product P is sucked by the suction port 32 provided on the lower surface.

The stacking device (2) has an inlet 42 with a radius less than one and a half times the outer diameter of the product P, and an L-shaped shooter.
A partition plate 45 is arranged parallel to the running direction of the belt 44 with a slight gap between the conveyor belt 44 running horizontally, and a step 46 is provided between the outlet 43 of the shooter 41 and the conveyor belt 44. will be established.

The present invention provides the molds (lower mold 13, upper mold 24) with passages 51, 52 for passing cooling water or hot water, and also provides the mounting member 10.
The same passages 53, 54, 55 as described above are provided in the lower base 7, the ram 8, and the upper base 9 which constitute the above as shown in Fig. 1.2, and a temperature sensor 51 consisting of a thermocouple is installed close to the multiple passages.
a, 52 a, 53 a, 54 a, 55 a Embed and insert as shown in Figure 3.

Of the above, hoses are connected to the passages 51 and 52 of the lower mold 13 and the upper mold 24, respectively, to pass cooling water (or hot water).

A hose for passing cooling water or hot water is also connected to the passages 53 to 55 described above.

No hoses are shown.

The temperature sensors 51a to 55a are set at a temperature of 35° C., and a signal is generated at the set temperature to stop the flow of cooling water or hot water to the corresponding passage. However, the set temperature is not the environmental temperature, and the environmental temperature is slightly higher.

(Function) The present invention adjusts the environmental temperature within the frame 6 of the molding device (1) of the mold 13 containing the first cutting blade 14 and the mold 24 containing the $2 cutting blade 25, not only in the mold pair but also in the molding machine. Temperature 5 is also measured by each temperature sensor on the mounting member 10 to which a mold pair, knockout rod, etc. are attached as necessary. l! ! Conventionally, the mold containing the first cutting blade 14 (
a lower mold 13), and a mold including a second cutting blade 25 (lower mold 24);
), which would be impossible due to the temperature of the mounting member 10, the present invention makes it possible to maintain the temperature of the first and second cutting blades at a substantially constant temperature. The temperature can be controlled to the optimum temperature to maintain accuracy.

(Effect) The present invention provides a mold including the first cutting blade 14 and a V second cutting blade 25.
Not only the temperature of the mold 24 including the mold 24 but also the temperature of the mounting member 10 which forms the trimming environment! It has a configuration that makes 4 adjustments,
Molded r! 1. Minimizes the temperature difference related to thermal expansion between the frame side and the mold, and performs resin sheet molding at the same time as trimming the sheet. Extremely good clearance accuracy for mold trimming. It has an effect that can be maintained.

[Brief explanation of the drawing]

The attached drawings show embodiments of the present invention, and FIG.
FIG. 3 is a cross-sectional view illustrating the embedding of a temperature sensor, and FIG. 4 is a side view showing two sides of a resin sheet molding machine to which the present invention is applied. 6 → Frame 7 → Lower base 8 → Ram 9 → Upper base
10 → Mounting member 11 → Pillar material 12 → Trimming part 13
→ Mold (lower mold) 14 → First cutting blade 24 → Mold (upper mold)
25-PtrJ2 cutting blade 51-55 → passage 51a~5
5a → Temperature sensor

Claims (1)

[Scope of Claims] A mounting member that respectively supports a mold having a first cutting blade at its mouth and a mold having a second cutting blade that trims the resin sheet in cooperation with the first cutting blade. In a resin sheet molding device that is fixedly attached to or freely slidable on a molding device frame, trimming is provided in which each of the molds and the mounting member of each mold is provided with a temperature-controlled water passage and a temperature sensor that detects the temperature of the passage. Trimming characterized in that the environmental temperature of the first and second cutting blades is controlled by each temperature sensor to prevent a difference in thermal expansion between the forming device frame and the first and second cutting blades. Temperature adjustment mechanism for a molding device frame equipped with a mold having a cutting blade.