Basic structure of the mold，guide post ，guide pins
The most important molds for stamping processing are convex and concave molds. Next is the discharge plate. The structure of the mold is mainly composed of these three elements as the center. (Figure 1)
Basic structure of the mold:
The content of Figure 1 is mainly classified based on the following two conditions.
1. Position of convex and concave molds
convex mold on top and convex mold on bottom (formal installation); convex mold on bottom and convex mold on top (reverse installation)
2. Is there a discharge plate and its arrangement
Is it on the convex mold or concave mold side, movable or fixed
(1)Structure of Formal installation without discharge plate
Used for processing that does not require edge pressing and the material will not be embedded in the punch. Used for multiple purposes. For example, V-shaped bending molds, deep drawing and punching molds that do not require wrinkle resistant pressure plates, etc.
(2) Structure of formal installation with fixed discharge plate
The discharge plate is located on the side of the concave mold and fixed to the structure of the concave mold. The representative use is the blanking die. Used when there is no need for edge pressing but the material is easily embedded in the convex mold. It is also often used for progressive dies for bending or drawing. Although the structure is simple and easy to use, the material may be obstructed by the discharge plate and the processing area cannot be observed. Therefore, it is necessary to cut off the excess part of the discharge plate to facilitate the observation of the processing area.
(3) Structure of formal installation with movable discharge plate structure
Usually referred to as a movable discharge plate structure, it is a well-known structural form. The discharge plate is located on the side of the convex mold and adopts a movable form. This structure is used when edge pressing is required and the material will be embedded in the convex mold. Mainly used for punching or progressive dies. Commonly used in precision machining molds. In precision machining molds, the guide post (pins) of the discharge plate are used to guide and limit the movement of the discharge plate. Then, the discharge plate is used to guide the front end of the convex mold, improving the fit between the convex mold and the concave mold.
(4) Structure of formal installation with movable discharge plate for the lower mold
The discharge plate is located on the side of the concave mold and adopts a movable structure. This structure is often used when bending and other processes do not require edge pressing, but when it is desired to remove parts attached to the concave mold. Because movable discharge plates can be used to create a space for inserting materials into the interior of the mold. It is also used for progressive processing of deep drawing.
(5) Reverse loading without discharge plate structur structure of reverse installation without discharge plate
The structure is a convex mold on the bottom and a concave mold on the top. The reverse installation structure must have an ejection device installed inside the concave mold. The ejection device is used to discharge the parts entering the concave mold from the concave mold. This structure without a discharge plate is often used for trimming dies of deep drawing parts.
(6) Structure of reverse installation with movable discharge plate
The structural form is installing a movable discharge plate on the convex mold side below. It is used for processing that requires edge pressing. In addition, due to the material sliding over the upper surface of the discharge plate, this surface is sometimes used as a material guide. Due to the fact that the ejection device can also be used as a edge pressing device, it is often used in molds for machining and deep drawing that require flatness.
Even with the same processing, changing the mold structure can result in a change in quality. For example, when edge pressing is required but not performed, etc. On the contrary, if the material is compressed without the need for edge pressing, it will lead to an increase in mold cost, so more attention needs to be paid.
The structure should be designed in conjunction with the functions required for processing.
Basic structure of the mold:
The content of Figure 1 is mainly classified based on the following two conditions.
1. Position of convex and concave molds
convex mold on top and convex mold on bottom (formal installation); convex mold on bottom and convex mold on top (reverse installation)
2. Is there a discharge plate and its arrangement
Is it on the convex mold or concave mold side, movable or fixed
(1)Structure of Formal installation without discharge plate
Used for processing that does not require edge pressing and the material will not be embedded in the punch. Used for multiple purposes. For example, V-shaped bending molds, deep drawing and punching molds that do not require wrinkle resistant pressure plates, etc.
(2) Structure of formal installation with fixed discharge plate
The discharge plate is located on the side of the concave mold and fixed to the structure of the concave mold. The representative use is the blanking die. Used when there is no need for edge pressing but the material is easily embedded in the convex mold. It is also often used for progressive dies for bending or drawing. Although the structure is simple and easy to use, the material may be obstructed by the discharge plate and the processing area cannot be observed. Therefore, it is necessary to cut off the excess part of the discharge plate to facilitate the observation of the processing area.
(3) Structure of formal installation with movable discharge plate structure
Usually referred to as a movable discharge plate structure, it is a well-known structural form. The discharge plate is located on the side of the convex mold and adopts a movable form. This structure is used when edge pressing is required and the material will be embedded in the convex mold. Mainly used for punching or progressive dies. Commonly used in precision machining molds. In precision machining molds, the guide post (pins) of the discharge plate are used to guide and limit the movement of the discharge plate. Then, the discharge plate is used to guide the front end of the convex mold, improving the fit between the convex mold and the concave mold.
(4) Structure of formal installation with movable discharge plate for the lower mold
The discharge plate is located on the side of the concave mold and adopts a movable structure. This structure is often used when bending and other processes do not require edge pressing, but when it is desired to remove parts attached to the concave mold. Because movable discharge plates can be used to create a space for inserting materials into the interior of the mold. It is also used for progressive processing of deep drawing.
(5) Reverse loading without discharge plate structur structure of reverse installation without discharge plate
The structure is a convex mold on the bottom and a concave mold on the top. The reverse installation structure must have an ejection device installed inside the concave mold. The ejection device is used to discharge the parts entering the concave mold from the concave mold. This structure without a discharge plate is often used for trimming dies of deep drawing parts.
(6) Structure of reverse installation with movable discharge plate
The structural form is installing a movable discharge plate on the convex mold side below. It is used for processing that requires edge pressing. In addition, due to the material sliding over the upper surface of the discharge plate, this surface is sometimes used as a material guide. Due to the fact that the ejection device can also be used as a edge pressing device, it is often used in molds for machining and deep drawing that require flatness.
Even with the same processing, changing the mold structure can result in a change in quality. For example, when edge pressing is required but not performed, etc. On the contrary, if the material is compressed without the need for edge pressing, it will lead to an increase in mold cost, so more attention needs to be paid.
The structure should be designed in conjunction with the functions required for processing.
