JPH075716U - Back side mold - Google Patents

Abstract

(57) [Abstract] [Purpose] In a back-molding die for Styrofoam molding, steam smoothly flows from the inner frame of the product to the outer frame of the product, causing foaming unevenness of the material in the molding chamber. To be a good quality product. [Structure] The top plate 1 of the concave-side box frame 2 is provided with a frame part 3 forming the inside of the product and a frame part 4 forming the outside side surface of the product. An inner space (i) is formed on the inner side of the surface of the frame portion 3 which constitutes the inner side of the product. Convex side box frame 1
The frame portion 15 constituting the outer bottom surface of the product is attached to the top plate 17 of 6. A frame portion 15 surface which is separated from the inner space a and constitutes the outer bottom surface of the product, and a frame portion 4 which constitutes the outer side surface of the product.
An outer space (b) is formed on the convex side box frame side by the frame portion surface that constitutes the outer side of the product made of surfaces.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a styrofoam-molded back trimming die.

[0002]

[Prior art]

 As shown in FIG. 2, a conventional back-faced metal mold forms a space C of the concave-side box frame by a frame surface A forming the outside of the product and a frame surface B forming the inside of the product. , Had a steam room.

[0003]

[Problems to be solved by the device]

 The quality of the product molded with the Styrofoam mold depends on the uniform foaming of the material, and in order for the foaming to be good, steam must pass smoothly from the surface forming the inside of the product to the surface forming the outside. . In the conventional back-face mold, when steam is introduced into the space C of the concave-side box frame, the pressure in the space C of the concave-side box frame becomes the same. Then, the steam penetrates into the molding chamber E through the small holes of the frame surface B forming the inside of the product, and the space D of the box frame on the convex side from the small holes of the frame A forming the outside of the product. The material in the molding chamber E is foamed by flowing out into the space C of the inside and the concave side box frame.

At this time, the outflow of steam from the molding chamber E into the space D of the convex side box frame has a negative pressure in the space D of the convex side box frame than in the space C of the concave side box frame. Therefore, out of the frame A that constitutes the outside of the product, the steam flows out smoothly from the frame (the convex surface in the drawing) of the mold that faces the space D of the convex side box frame. In the frame portion facing the space C of the concave-side box frame, that is, the frame portion forming the outer side surface of the product, the space C of the concave-side box frame has the same pressure and thus constitutes the inside of the product. It becomes difficult for the steam to flow from the frame portion B. That is, foaming is good at the bottom part of the product, but foaming is incomplete at the peripheral wall part of the outer side surface, resulting in a poor product.

In view of this, the present invention provides a backside mold capable of producing a high-quality product in which steam is smoothly circulated from the inner frame portion of the product to the outer frame portion of the product to prevent foaming unevenness. It is the one we are trying to provide.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is characterized in that an outer space formed by a frame surface forming the outside of the product and an inner space formed by a frame surface forming the inside of the product are separated. It is what

[0007]

[Action]

 To explain the operation of the present invention, when steam is introduced into the inner space formed by the frame surface that constitutes the inside of the product from the steam introduction port of the concave side box frame through the ventilation passage, the inside space becomes It becomes the same pressure. The steam in the inner space penetrates into the molding chamber through the small holes in the frame that forms the inside of the product, and this time, the outside of the product enters the outside space formed by the frame surface that forms the outside of the product from the molding chamber. Although the steam flows out from the small holes in the frame that makes up the outer space, the outer space is separated from the inner space, so the overall pressure is lower than that in the inner space, and the steam from the inner space is smoother than in the molding chamber. Distribute to the outer space. Therefore, the steam smoothly flows from the frame portion on the inner side of the product to the frame portion on the outer side of the product, and there is no foaming unevenness of the material in the molding chamber, resulting in a high quality product.

[0008]

【Example】

 An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a vertical cross-sectional side view of a rear side picking die of the present invention, and FIG. 2 is a vertical side view of a conventional rear side picking die. 1 is a top plate of the concave side box frame 2, to which the frame portion 3 which constitutes the inner side of the product and the frame portion 4 which constitutes the outer side surface of the product are fixed. . Reference numeral 5 denotes a mounting wall formed by bending the inner wall of the concave-side box frame 2 on the steam inlet 6 side and the inner wall on the steam outlet 7 side along the respective inner walls at a constant distance. The plate 8 is detachably attached by bolts and nuts 9, respectively. Reference numeral 10 denotes an air passage that is detachably provided between the partition plates 8 with bolts and nuts 11 and has a gutter shape with an open upper surface.

Further, a ventilation port 12 is opened in a partition plate 8 part to which both ends of the ventilation passage 10 are attached, and an upper surface of the ventilation passage 10 is detachably fixed to the top plate 1 by bolts and nuts. It Further, a long hole 14 having the same width as that of the ventilation passage 10 is formed in the top plate portion corresponding to the back side of the frame portion 3 which constitutes the inside of the product, and the vapor portion which constitutes the inside of the product from the ventilation passage 10 is formed. It is introduced into the inner space a formed by three surfaces.

Reference numeral 15 denotes a frame portion that constitutes an outer bottom surface of the product attached to the top plate 17 of the convex-side box frame 16 by a connecting member 18, and the frame portion 15 that constitutes the outer bottom surface of the product and the outside of the product. The outer side of the product is constituted by the frame portion 4 constituting the side surface, and the outer space b is formed by the frame portion 4 surface constituting the outer side surface of the product and the frame portion 15 constituting the outer bottom surface of the product. ing. In the figure, 19 is a small hole formed in the frame portion 3 forming the inside of the product, 20 is a hole formed in the frame portion 4 forming the outer side surface of the product and the frame portion 15 forming the outer bottom surface of the product. The small hole 21 provided is a molding chamber.

[0011]

[Effect of device]

 According to the present invention, since the outer space formed by the frame surface forming the outer side of the product and the inner space formed by the frame surface forming the inner side of the product are separated, steam is generated inside the product. Since it smoothly flows from the frame part to the frame part outside the product, it is a useful idea that there is no foaming unevenness of the material in the molding chamber and a good quality product can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing an embodiment of a back side mold of the present invention.

FIG. 2 is a vertical cross-sectional side view showing an example of a conventional back surface cutting mold.

[Explanation of symbols] 1 Top plate 2 Concave side box frame 3 Frame part that constitutes the inside of the product 4 Frame part that constitutes the outer side surface of the product 15 Frame part that constitutes the outside bottom surface of the product 16 Convex side box frame 17 Top Plate 19 Small hole 20 Small hole b Inner space b Outside space

Claims (1)

[Scope of utility model registration request] 1. A back surface metallurgical part, characterized in that an outer space formed by a frame part surface forming the outside of the product and an inner space formed by a frame part surface forming the inside of the product are separated. Type.