Die for producing rubber sealing gasket of plate heat exchanger

Abstract

The utility model discloses a die for producing a rubber sealing gasket of a plate heat exchanger, which comprises an upper die and a lower die, and the upper die and the lower die are respectively provided with an upper cavity and a lower cavity which jointly define the rubber sealing gasket of the plate heat exchanger; the two sides of the width of the upper cavity are respectively provided with an upper inclined surface which is inclined upwards and outwards, and the two sides of the lower cavity are respectively provided with a lower inclined surface which is inclined upwards and outwards; the bottom end of the upper slope is connected with the upper cavity, the top end of the upper slope is connected with the parting surface of the upper die, the bottom end of the lower slope is connected with the lower cavity, and the top end of the lower slope is connected with the parting surface of the lower die; and when the corresponding parting surfaces of the upper mold and the lower mold are contacted, the upper inclined surface is attached to the lower inclined surface. The molded surface shape of a traditional mold is changed, the upper inclined surface and the lower inclined surface are additionally arranged between the corresponding mold cavity and the parting surface of the horizontal plane, and the two inclined surfaces are consistent in shape, so that the effect that the mold cavity is fully filled with a sizing material is facilitated, and in addition, the redundant sizing material is separated from the two sides of the two ends of a product after processing is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of producing rubber sealing gaskets for plate type heat exchangers, in particular to a mould for producing rubber sealing gaskets for plate type heat exchangers. Background Art

[0002] Plate heat exchanger gaskets are primarily used to seal between stacked plates in plate heat exchangers. They are formed in a mold using raw rubber. Current plate heat exchanger gaskets are typically irregularly shaped, with a wide center width and narrower widths at the upper and lower ends. The upper and lower molds each have an upper or lower cavity that matches the shape of the plate heat exchanger gasket. The lower cavity, in particular, is typically a trapezoidal shape, wide at the top and narrow at the bottom, with parting surfaces located at the trapezoid's endpoints. The following describes the issues associated with such molds.

[0003] For example, the Chinese utility model patent application number is CN202321328250.9, the application date is May 29, 2023, and the application name is "A plate heat exchanger sealing gasket mold integrating injection and forming". After the upper mold and the lower mold are closed, a glue injection channel is formed inside, and the glue injection channel is connected to the glue injection mold cavity. Or Figure 1 The schematic diagram of a traditional mold for plate heat exchanger gasket production shows that the horizontal parting surface between the upper and lower molds directly connects to the upper and lower cavities, with the parting surface located at the widest point of the product. This results in flash on both sides of the product after processing, making it difficult to remove from the product.

[0004] Therefore, a mold for producing rubber sealing gaskets for plate heat exchangers that is conducive to tearing edges is needed. Utility Model Content

[0005] The utility model aims to provide a mould for producing rubber sealing gaskets for plate heat exchangers which is convenient for tearing edges.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A mold for producing a rubber sealing gasket for a plate heat exchanger, comprising an upper mold and a lower mold, wherein the upper mold and the lower mold are respectively provided with an upper cavity and a lower cavity which together enclose the rubber sealing gasket for the plate heat exchanger;

[0008] The width of the upper cavity is provided with upper inclined surfaces that are inclined upward and outward, so that both ends of the upper cavity have bulges, and the width of the lower cavity is provided with lower inclined surfaces that are inclined upward and outward, respectively.

[0009] The bottom end of the upper inclined surface is connected to the upper cavity, the top end of the upper inclined surface is connected to the parting surface of the upper mold, the bottom end of the lower inclined surface is connected to the lower cavity, and the top end of the lower inclined surface is connected to the parting surface of the lower mold;

[0010] When the corresponding parting surfaces of the upper mold and the lower mold are in contact, the upper inclined surface is in contact with the lower inclined surface.

[0011] Furthermore, the height of the upper slope is 2-3 mm, and the height of the lower slope is 2-3 mm.

[0012] Furthermore, it also includes an upper tearing edge groove and a lower tearing edge groove respectively arranged at corresponding positions on the upper cavity and the lower cavity, the two upper tearing edge grooves are respectively arranged on the outside of the two sides of the width of the upper cavity, and the two lower tearing edge grooves are respectively arranged on the outside of the two sides of the width of the lower cavity.

[0013] Furthermore, the cross-sections of the upper tearing edge groove and the lower tearing edge groove are semicircular.

[0014] Furthermore, it also includes two residual material grooves arranged outside the width of both sides of the lower mold, and the residual material grooves are arranged on the outside of the lower tearing edge groove.

[0015] In the above technical solution, the utility model has the following beneficial effects:

[0016] This new type changes the surface shape of the traditional mold. Corresponding upper and lower inclined surfaces are added between the parting surface of the upper cavity and the horizontal surface, and between the parting surface of the lower cavity and the horizontal surface. The inclination angles of these two inclined surfaces are consistent, which is conducive to the full filling of the rubber into the cavity. It is also conducive to separating the excess rubber from the width sides of the product after processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural diagram of the upper mold and the lower mold of the prior art;

[0019] Figure 2 This is a schematic structural diagram of the mold splitting disclosed in the utility model.

[0020] Reference numerals:

[0021] Upper die 1, lower die 2, upper inclined surface 3, lower inclined surface 4, lower tearing edge groove 5, and residual material groove 6. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] It should be noted that the terms "above", "one end", "upper", etc. used in this article indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Similar expressions are only for illustrative purposes, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "one part", "two parts", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] like Figure 2 The mold shown is for producing rubber sealing gaskets for plate heat exchangers, comprising an upper mold 1 and a lower mold 2. The upper mold 1 and the lower mold 2 are respectively provided with an upper cavity and a lower cavity which together enclose the rubber sealing gaskets for the plate heat exchanger.

[0025] Upper inclined surfaces 3 slanting upward and outward are respectively provided on both sides of the width of the upper cavity so that there are bulges at both ends of the width of the upper cavity, and lower inclined surfaces 4 slanting upward and outward are respectively provided on both sides of the lower cavity; because the upper cavity is narrow at the top and wide at the bottom, the two upper inclined surfaces 3 make the two ends of the width of the upper cavity have two downward pointed bulges.

[0026] The bottom end of upper bevel 3 connects to the upper cavity, the top end of upper bevel 3 connects to the parting surface of upper mold 1, the bottom end of lower bevel 4 connects to the lower cavity, and the top end of lower bevel 4 connects to the parting surface of lower mold 2. The upper cavity does not directly connect to the horizontal parting surface. Instead, the two lowest width ends of the upper cavity extend directly upward and outward to form the upper bevel, and the two highest width ends of the lower cavity extend directly outward and upward to form the lower bevel. However, the shapes of the upper and lower cavities are not changed.

[0027] When the corresponding parting surfaces of upper mold 1 and lower mold 2 come into contact, upper bevel 3 abuts lower bevel 4. This maintains the shape of the molded product, but creates a height difference between the widest sides of the product and the flash on either side. The raised surfaces create a V-shaped fold line between the flash and the product, further facilitating separation. Furthermore, the presence of the upper and lower bevels enhances the sealing properties of the mold cavity, allowing the rubber compound to fully fill the cavity during molding, improving vulcanization and enhancing product density.

[0028] Preferably, the height of the upper bevel 3 is 2-3 mm, and the height of the lower bevel 4 is 2-3 mm. If the height is too small, the ability to separate the flash is weakened. If the height is too large, it is difficult to process the mold and the excess material flows out of the cavity slowly.

[0029] Preferably, the mold further includes corresponding upper and lower tear-off grooves 5, one on each side of the upper cavity and one on each side of the lower cavity. Excess adhesive can flow into the tear-off grooves. On the horizontal parting surface, the upper and lower tear-off grooves 5 are spaced 0.5 mm from the upper and lower slopes, respectively.

[0030] Preferably, the cross section of the upper tearing groove and the lower tearing groove 5 is semicircular, and the upper tearing groove and the lower tearing groove 5 are combined into a circle. This shape is easy to tear off and has little waste.

[0031] Preferably, it further comprises two excess material grooves 6 arranged on the outside of the width of both sides of the lower mold 2, and the excess material grooves 6 are arranged on the outside of the lower tearing groove 5. The excess rubber material passes through the lower inclined surface and the lower tearing groove 5 in sequence and reaches the excess material groove 6.

[0032] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mold for producing rubber sealing gaskets for plate heat exchangers, characterized in that: It comprises an upper mold (1) and a lower mold (2), wherein the upper mold (1) and the lower mold (2) are respectively provided with an upper mold cavity and a lower mold cavity which together enclose a rubber sealing gasket of a plate heat exchanger; Upper inclined surfaces (3) inclined upward and outward are respectively provided on both sides of the width of the upper cavity so that both ends of the upper cavity have bulges, and lower inclined surfaces (4) inclined upward and outward are respectively provided on both sides of the lower cavity; The bottom end of the upper inclined surface (3) is connected to the upper cavity, the top end of the upper inclined surface (3) is connected to the parting surface of the upper mold (1), the bottom end of the lower inclined surface (4) is connected to the lower cavity, and the top end of the lower inclined surface (4) is connected to the parting surface of the lower mold (2); When the corresponding parting surfaces of the upper mold (1) and the lower mold (2) are in contact, the upper inclined surface (3) is in contact with the lower inclined surface (4).

2. A mold for producing rubber sealing gaskets for plate heat exchangers according to claim 1, characterized in that: The height of the upper inclined surface (3) is 2-3 mm, and the height of the lower inclined surface (4) is 2-3 mm.

3. The mold for producing rubber sealing gaskets for plate heat exchangers according to claim 1, characterized in that: It also includes an upper tearing edge groove and a lower tearing edge groove (5) respectively arranged at corresponding positions on the upper cavity and the lower cavity, the two upper tearing edge grooves respectively arranged outside the width of both sides of the upper cavity, and the two lower tearing edge grooves (5) respectively arranged outside the width of both sides of the lower cavity.

4. The mold for producing rubber sealing gaskets for plate heat exchangers according to claim 3, characterized in that: The cross sections of the upper tearing edge groove and the lower tearing edge groove (5) are semicircular.

5. The mold for producing rubber sealing gaskets for plate heat exchangers according to claim 4, characterized in that: It also includes two residual material grooves (6) arranged outside the width of both sides of the lower mold (2), and the residual material grooves (6) are arranged outside the lower tearing edge groove (5).

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