An injection mold cavity arc-bending inclined lifter core-pulling mechanism

Abstract

The present invention discloses a curved, inclined ejection core-pulling mechanism for an injection mold cavity. The mechanism comprises a track slot block, a connecting rod, and a special-shaped ejection block. The track slot block is fixedly mounted on the movable mold of the injection mold. One end of the connecting rod slides in a slot of the track slot block via a track pin, while the other end passes through the inclined ejection block in the injection mold and connects to the special-shaped ejection block. The special-shaped ejection block is positioned at the curved portion of the plastic molded product. The curved, inclined ejection core-pulling mechanism for an injection mold cavity of the present invention utilizes the forward and reverse guide grooves of the track block to guide the connecting rod inward and outward movement to solve the molding problem of plastic products that cannot be ejected from the mold at the curved portion of the cavity, thereby shortening the product development cycle and reducing the product design and manufacturing costs.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an arc-bent inclined top core-pulling mechanism for an injection mold cavity. Background Art

[0002] In existing injection molding methods, the main approaches to addressing the problem of arc-bend plastic parts failing to release from the mold involve modifying the outer arc-bend clamping structure of the plastic part or replacing the material with sheet metal. These methods require redesigning the product structure, compromising quality requirements, or increasing manufacturing costs, leading to longer development cycles and increased manufacturing costs. Summary of the Invention

[0003] The purpose of the present invention is to provide an injection mold cavity arc-curved inclined top core pulling mechanism to solve the molding problem of plastic products that cannot be demolded at the outer arc-curved cavity, thereby shortening the product development cycle and reducing the product design and manufacturing costs.

[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides an arc-bend inclined ejector core pulling mechanism for an injection mold cavity, comprising a track groove block, a connecting rod and a special-shaped push block. The track groove block is fixedly mounted on the movable mold of the injection mold, one end of the connecting rod is slidably fitted in the slide groove of the track groove block through a track shaft pin, and the other end passes through the inclined ejector block in the injection mold and is connected to the special-shaped push block; the special-shaped push block is located at the arc bend of the plastic molded product.

[0005] Preferably, a positive guide groove and a negative guide groove are provided on the track groove block, and the positive guide groove and the negative guide groove are connected to each other to form a V-shaped groove, the lower section of the V-shaped groove is the positive guide groove, and the upper section of the V-shaped groove is the negative guide groove, and the connection point of the positive guide groove and the negative guide groove is the track reversal point.

[0006] Preferably, with the vertical axis of the injection mold as a reference, the positive guide groove is inclined toward a direction close to the vertical axis, and the reverse guide groove is inclined toward a direction away from the vertical axis.

[0007] Preferably, the track slot block is fixedly mounted on the movable mold of the injection mold by means of bolts, and the special-shaped push block is fixed to the other end of the connecting rod by means of bolts.

[0008] Preferably, a guide sleeve is provided on the connecting rod, and the guide sleeve is slidably matched with the through hole on the inclined ejector block.

[0009] Preferably, the bottom of the inclined ejector block is connected to a inclined ejector rod, and the other end of the inclined ejector rod passes through the movable mold and is hinged to the top plate of the injection mold.

[0010] Preferably, a guide sleeve is provided on the inclined ejector rod, and the guide sleeve is slidably matched with the through hole on the movable mold; a inclined ejector slide is provided on the top plate of the injection mold, and the other end of the inclined ejector rod is hinged on the inclined ejector slide.

[0011] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0012] The arc-curved inclined ejection core pulling mechanism of the injection mold cavity of the present invention adopts the positive and negative guide grooves of the track block to guide the connecting rod to perform the inner pulling and ejection movements to solve the molding problem of the outer arc-curved cavity of the plastic product that cannot be ejected from the mold, thereby shortening the product development cycle and reducing the design and manufacturing costs of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention 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 of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of a plastic molding product;

[0015] Figure 2 for Figure 1 A partial enlarged view of point D in the middle;

[0016] Figure 3 This is the structural composition diagram of the cavity arc bending inclined top core pulling mechanism;

[0017] Figure 4 This is the installation diagram of the cavity arc bending inclined top core pulling mechanism;

[0018] Figure 5 Operation of the arc bending and inclined top core pulling mechanism of the cavity Figure 1 ;

[0019] Figure 6 Operation of the arc bending and inclined top core pulling mechanism of the cavity Figure 2 ;

[0020] Figure 7 Operation of the arc bending and inclined top core pulling mechanism of the cavity Figure 3 ;

[0021] Among them, 1 clamp line; 2 outer arc bend; 3 inner arc bend; 4 track groove block; 5 reverse guide groove; 6 track reversal point; 7 positive guide groove; 8 bolt; 9 track shaft pin; 10 connecting rod; 11 guide sleeve; 12 special-shaped push block; 13 movable mold insert; 14 inclined ejector block; 15 ejector pin; 16 inclined ejector slide; 17 cavity; 18 movable mold; 19 guide sleeve; 20 inclined ejector pin; 21 upper ejector plate; 22 lower ejector plate; 23 bottom plate; 24 ejector block; 25 gate plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide an injection mold cavity arc-curved inclined top core pulling mechanism to solve the molding problem of plastic products that cannot be demolded at the outer arc-curved cavity, thereby shortening the product development cycle and reducing the product design and manufacturing costs.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1-7 As shown, this embodiment provides an injection mold cavity arc bend inclined ejection core pulling mechanism, including a track slot block 4, a connecting rod 10, and a special-shaped push block 12. The track slot block 4 is fixedly mounted on the movable mold 18 of the injection mold. One end of the connecting rod 10 slides into the slide groove of the track slot block 4 via a track shaft pin 9, and the other end passes through the inclined ejection block 14 in the injection mold and connects to the special-shaped ejection block 12; the special-shaped ejection block 12 is located at the arc bend of the plastic molded product. This mechanism is installed in two parts. One group is to install the track slot block 4 in the movable mold 18 of the injection mold through bolts 8, and the other group is to install the connecting rod 10, special-shaped ejection block 12 and guide sleeve 11 in the inclined ejection block 14. The track shaft pin 9 is used to connect the two parts to perform inward and outward pulling movements.

[0026] In this embodiment, the track groove block 4 is provided with a positive guide groove 7 and a negative guide groove 5. The positive guide groove 7 and the negative guide groove 5 are interconnected to form a V-shaped groove. The lower section of the V-shaped groove is the positive guide groove 7, and the upper section of the V-shaped groove is the negative guide groove 5. The connection between the positive guide groove 7 and the negative guide groove 5 is the track reversal point 6. With respect to the axis of the injection mold as a reference, the positive guide groove 7 is tilted toward the axis, while the negative guide groove 5 is tilted away from the axis. A track pin 9 at one end of the connecting rod 10 is slidable within the guide groove formed by the positive guide groove 7 and the negative guide groove 5.

[0027] To achieve the connection and installation of the various components of the injection mold cavity arc-bending inclined ejector core-pulling mechanism, in this embodiment, the track slot block 4 is fixed to the movable mold 18 of the injection mold by bolts 8, and the special-shaped ejector block 12 is fixed to the other end of the connecting rod 10 by bolts 8. The guide sleeve 11 provided on the connecting rod 10 is slidably engaged with the through hole of the inclined ejector block 14.

[0028] Furthermore, a lift rod 20 is connected to the bottom of the lift block 14. The other end of the lift rod 20 passes through the movable mold 18 and is hingedly connected to the upper plate 21 of the injection mold top plate. A guide sleeve 19 is provided on the lift rod 20, which slidably engages with a through hole in the movable mold 18. The upper plate 21 of the injection mold is provided with a lift slide 16, to which the other end of the lift rod 20 is hingedly connected.

[0029] The working principle of the injection mold cavity arc bending inclined top core pulling mechanism in the present invention is as follows:

[0030] When the injection molding of the mold is completed, the injection molding machine ejects the ejector block 24 at the bottom plate 23, and the ejector block 24 pushes the lower ejector plate 22 and the upper ejector plate 21 as well as the cavity 17 to open the mold and make Z-direction movement together; at this time, the inclined ejector rod 20 pushes the inclined ejector block 14 to move upward, so that the connecting rod 10 will move in the positive guide groove 7 of the track groove block 4 along with the track shaft pin 9 (as shown in FIG. Figure 3 ), then the inner arc bend 3 of the plastic part will adhere to the inclined ejector block 14 and as the inclined ejector moves, the plastic part will produce elastic deformation and break away from the outer arc bend 2 of the cavity (such as Figure 5 ), when the track reversal point 6 is reached, the ejection stops, and the cavity 17 continues to open the mold to separate from the plastic product (such as Figure 6 ).

[0031] When the mold opening of the cavity 17 is completed, the injection molding machine continues to eject the ejector block 24, pushing the top plate upward, and the connecting rod 10 will follow the track shaft pin 9 to enter the reverse guide groove 5 at the track reversal point 6 of the track groove block 4, and the special-shaped push block 12 will perform the cavity arc bend inclined ejection core pulling ejection movement. At this time, the plastic part adhered to the inclined ejector block 14 will be ejected and separated from the inclined ejector block 14 along with the special-shaped push block 12 until the ejection is completed and the plastic part product is molded and ejected (such as Figure 6 When closing the mold, it remains in the original position and returns to the original path without causing interference or collision.

[0032] The arc-bend inclined top core-pulling mechanism of the injection mold cavity of the present invention is applied to arc-bend products without clipping lines 1, products requiring secondary processing (electroplating or spraying), and other plastic products with high appearance and quality requirements. It is widely used in home appliances and automobile injection molds.

[0033] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An injection mold cavity arc bending inclined top core pulling mechanism, characterized by: It includes a track groove block, a connecting rod and a special-shaped push block. The track groove block is fixedly installed on the movable mold of the injection mold. One end of the connecting rod is slidably fitted in the slide groove of the track groove block through a track shaft pin, and the other end passes through the inclined ejector block in the injection mold and is connected to the special-shaped push block. A guide sleeve is provided on the connecting rod, and the guide sleeve is slidably fitted in the through hole of the inclined ejector block. The special-shaped push block is located at the arc bend of the plastic molded product. The track groove block is provided with a positive guide groove and a negative guide groove, and the positive guide groove and the negative guide groove are connected to each other to form a V-shaped groove, the lower section of the V-shaped groove is the positive guide groove, and the upper section of the V-shaped groove is the negative guide groove, and the connection point of the positive guide groove and the negative guide groove is the track reversal point; with the vertical axis of the injection mold as a reference, the positive guide groove is inclined in the direction close to the vertical axis, and the negative guide groove is inclined in the direction away from the vertical axis.

2. The injection mold cavity arc bending inclined top core pulling mechanism according to claim 1, characterized in that: The track slot block is fixedly mounted on the movable mold of the injection mold by means of bolts, and the special-shaped push block is fixed to the other end of the connecting rod by means of bolts.

3. The injection mold cavity arc bending inclined top core pulling mechanism according to claim 1, characterized in that: The bottom of the inclined ejector block is connected with an inclined ejector rod, and the other end of the inclined ejector rod passes through the movable mold and is hinged to the top plate of the injection mold.

4. The injection mold cavity arc bending inclined top core pulling mechanism according to claim 3, characterized in that: A guide sleeve is provided on the inclined ejector rod, and the guide sleeve is slidably matched with the through hole on the movable mold; an inclined ejector slide is provided on the top plate of the injection mold, and the other end of the inclined ejector rod is hinged on the inclined ejector slide.

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