CN209738205U - A molded product release structure - Google Patents

Abstract

The utility model provides a demoulding structure for a molded product, which can perform mold demoulding operation on the molded product without damage, and has a high yield rate of the product. It includes an outer mold, a forming inner core, and a forming spiral cavity, and also includes a discharge push tube, and the forming spiral cavity is surrounded by the external mold, the forming inner core, and the discharge push tube. The unloading push tube is set on the outside of the forming inner core, and there is a clearance fit between the two. The bottom of the unloading push tube is installed on the ejection structure, and the top end of the unloading push tube is a forming spiral At the bottom of the cavity, the ejection stroke of the unloading push tube matches the height of the product formed in the forming spiral cavity; the outer mold is connected to a rotary drive device.

Description

A molded product release structure

technical field

The utility model relates to the technical field of injection molds, in particular to a demoulding structure for molded products.

Background technique

The electric drive worm is a relatively common part. The worm is divided into an inner helix and an outer helix. According to different uses, there are different product structures. During injection molding, the corresponding cavity can be used. After the screw with external helical thread is injection molded, the molded product needs to be demolded. In the prior art, most of the molded products are ejected with ejector pins. This hard demoulding method will damage the outer surface of the worm. thread, leading to a high product reject rate.

Contents of the invention

In order to solve the problem in the prior art that the product is damaged when the molded product is demoulded, resulting in a high reject rate, the utility model provides a molded product demoulding structure, which can perform demoulding operation on the molded product without damage, and the product is of good quality. The rate is higher.

The structure of the utility model is as follows: it includes an outer mold, a forming inner core, and a forming spiral cavity; The inner mold core and the discharge push tube are enclosed, and the discharge push tube is set on the outside of the forming inner core, and there is a clearance fit between the two, and the bottom of the discharge push tube is installed on the ejection structure. The top end of the unloading push tube is the bottom of the forming spiral cavity, and the ejection stroke of the unloading push tube matches the height of the product formed by the forming spiral cavity; the outer mold is connected to a rotating drive device.

It is further characterized by:

The rotary driving device includes a rack, a main gear, and a slave gear meshed with the master gear, the slave gear is sleeved on the outer wall of the outer mold, and the tooth surface of the rack is in contact with the The rotating shaft of the main gear meshes, and the rack is driven by the cylinder to make a linear motion;

The ejection structure is a push plate.

The utility model provides a molding product demoulding structure. The product is located on the upper end surface of the unloading push tube between the molding inner core and the molding spiral cavity. When unloading, the rotating device drives the molding spiral cavity along the axial direction. Rotate downward until the product is completely exposed, and the ejector device pushes the discharge push tube to slide upward, and the product is ejected upward until it falls from the upper end of the inner core; during the whole process, the demoulding structure will not affect the formed product No hard operation occurs on the outer surface, that is, no damage will be caused to the outer surface of the product, which improves the yield of the product.

Description of drawings

Fig. 1 is the overall structure schematic diagram of demoulding structure;

Fig. 2 is a schematic diagram of the cross-sectional structure at A before demoulding;

Fig. 3 is the sectional structure schematic diagram of place A in demoulding;

Fig. 4 is a schematic diagram of a cross-sectional structure at A after demoulding.

Detailed ways

As shown in Figures 1 to 4, the utility model includes an outer mold 2 and a molding inner core 7, the outer mold 2 is provided with a support sleeve 3, and the forming spiral cavity is composed of the outer mold 2 and the molding inner core. 7. Surrounded by a discharge push tube 8, the discharge push tube 8 is set on the outside of the forming inner core 7, and there is a gap between the two, and the bottom of the discharge push tube 8 is installed on the ejection structure , the top end of the discharge push tube 8 is the bottom of the forming spiral cavity, and the ejection stroke of the discharge push tube 8 matches the height of the product 1 formed by the forming spiral cavity; the outer mold 2 Connect the rotary drive device; the unloading push tube 8 slides upward in the axial direction under the drive of the ejector device; the bottom end of the forming inner core 7 is fixed, and the outer mold 2 rotates in the axial direction under the drive of the rotary drive device; The driving device includes a rack 6, the rack 6 is installed on the base 11 through the rack support part 10, the main gear 5 is installed on the base 11 through a transmission shaft and a bearing, and it also includes a slave gear 4 meshing with the main gear 5, and the slave gear 4 is socketed on the outer wall of the outer mold 2, the slave gear 4 and the outer mold 2 are installed on the base 11 through the support seat, the tooth surface of the rack 6 meshes with the rotating shaft of the main gear 5, and the rack 6 is driven by the cylinder to make a linear motion; The ejector is a push plate (not marked in the accompanying drawings), and the push plate is installed at the bottom of the discharge push tube 8.

As shown in FIG. 2 , the formed product 1 is located in the forming spiral cavity surrounded by the outer mold 2 , the forming inner core 7 and the unloading push tube 8 . When the mold is opened, the cylinder drives the rack 6 to move in a straight line, the rack 6 drives the driving wheel 5 to rotate, and then drives the driven wheel 4 to rotate, because the driven wheel 4 is fixedly connected to the outer surface of the forming spiral cavity 2, so the forming spiral The cavity 2 will rotate accordingly; the bottom end of the forming inner core 7 is fixed, and the bottom end of the discharge push tube 8 is fixed on the mold push plate, so when the mold is opened, the forming spiral cavity 2 is driven by the rotating rotating device in the direction of the rotating shaft. Axial downward movement, when the thread of the outer mold 2 is completely separated from the outer surface of the product 1, the cylinder 7 stops, as shown in Figure 3; at this time, the push plate moves upward, pushing the unloading push tube 8 upward, and the product 1 also moves upwards thereupon until the product 1 is completely separated from the molding inner core 7, as shown in Figure 4, and the demoulding operation is completed.

After using the technical solution of the utility model, the demoulding structure drives the forming spiral cavity 2 to rotate through the rotating rotating device, so that the forming spiral cavity 2 is separated from the product, and the ejector pin pushes the unloading push tube 8 and then pushes the bottom end of the product 1, The product 1 is separated from the molding inner core 7. During the whole process, no damage will be caused to the helix on the outer surface of the product, which ensures the accuracy of the product and improves the rate of good products. Moreover, the demoulding structure has a simple structure and is suitable for industrial applications.

Claims (3)

1. A molded product demoulding structure, which comprises an outer mold, a molding inner core, and a molding spiral cavity, characterized in that: it also includes a discharge push tube, and the molding spiral cavity is formed by the outer mold, Forming the inner core and the discharge push tube, the discharge push tube is set on the outside of the forming inner core, and there is a clearance fit between the two, the bottom of the discharge push tube is installed on the ejection structure, The top end of the unloading push tube is the bottom of the forming spiral cavity, and the ejection stroke of the unloading push tube matches the height of the product formed by the forming spiral cavity; the outer mold is connected to a rotating drive device. 2. A molded product demoulding structure according to claim 1, characterized in that: said rotary driving device includes a rack and a master gear, and also includes a slave gear meshed with said master gear, said slave gear sleeve Connected to the outer wall of the outer mold, the tooth surface of the rack meshes with the rotation shaft of the main gear, and the rack is driven by a cylinder to move linearly. 3. The molded product demoulding structure according to claim 1, wherein the ejection structure is a push plate.