Plastic mold flat top positioning device for preventing product from being pulled by inclined top

Abstract

The utility model belongs to the technical field of injection molds, and particularly discloses a plastic mold flat top positioning device for preventing a product from being pulled by an inclined top, which comprises an inclined top structure, a flat top, a rear mold core and an ejector pin fixing plate, and the inclined top structure comprises the inclined top and an inclined top supporting column; the inclined ejector structure is located on the outer side of the flat ejector, the rear mold core comprises an inclined ejector limiting hole and a flat ejector guide hole, the top end face of the flat ejector is a first rubber position face and a second rubber position face which are of a step-shaped structure, the first rubber position face and the second rubber position face are consistent with the inclined face angle of an outlet of the flat ejector guide hole of the rear mold core, and the bottom end of the flat ejector is movably connected with the ejector pin fixing plate. In order to solve the manufacturing problems of various products with complex structures, the top of the flat top is designed into a step-shaped inclined surface structure, so that the stress area of the flat top surface to the product is increased, the product is in more contact with the flat top, the pulling of the inclined top to the product is reduced, and the problem that the product is difficult to take out or is damaged due to excessive clasping of the surface of the inclined top is avoided; and the output of defective products is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a device for positioning a flat top of a plastic mold to prevent a product from being pulled by an inclined top. Background Art

[0002] In the mold design for the production of various plastic products with complex shapes, the inclined ejector is a type of ejection structure in the mold system. When the product design has internal structures such as buckles, bosses or deep recesses, the inclined ejector mechanism becomes a more suitable choice because it can effectively solve these parts that are difficult to demold directly. During the use of the injection mold, when all the inclined ejectors of a product move in the same direction, and the inclined ejector ejects the product during the molding process, there is a high probability that the product will hold the inclined ejector tightly due to its own material properties. The product holding the inclined ejector tightly causes the product to move with the inclined ejector, resulting in difficulty in removing the product or causing product damage. In severe cases, it may also cause damage to the mold and the product, affecting the product molding quality and the service life of the mold, and reducing production efficiency.

[0003] To solve this problem, a Chinese utility model patent publication number CN216914740U, entitled "A mold for preventing products from sticking to a slanted top structure," was published. The invention mainly involves providing a flat top. During demoulding, the slanted top rod rotates inwards to drive the slanted top block away from the product. Due to a certain degree of stickiness between the product and the slanted top block, both sides of the product will also be displaced inwards. When the product moves a certain distance, the flat top will block the product, preventing it from always sticking to the slanted top block and preventing deformation caused by excessive inward displacement of both sides of the product, thereby completing demoulding well. However, this patented technology cannot solve the problem of complex-shaped products in the injection molding process. When the product has multiple slant surfaces, the top of the flat top is flat and does not match the slanted shape of the product. The contact area between the mold and the product is small, and the force per unit area is large and concentrated, which may damage the product. It cannot solve the problem of the product holding the slanted top tightly during demoulding, causing the product to move with the slanted top, making it difficult to remove the product or causing damage to the product, thereby affecting production efficiency and product quality. Therefore, we propose a newly designed flat top positioning device for plastic molds to prevent products from being pulled by the inclined top. Utility Model Content

[0004] The purpose of the utility model is to provide a device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top. In response to the production and manufacturing needs of various plastic products with complex shapes, the mold structure design is improved in many aspects to enable it to support new processes. The top of the flat top is designed as a stepped inclined surface structure to increase the force area of ​​the flat top on the product, so that the product has more contact with the flat top, reduce the pulling of the inclined top on the product, and avoid the difficulty of removing or straining caused by the product holding the inclined top too tightly, so as to achieve the purpose of solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A device for positioning a flat top of a plastic mold to prevent a product from being pulled by a slanted top comprises a slanted top structure, a flat top, a product, a rear mold core, and an ejector pin fixing plate, and is characterized in that: the slanted top structure comprises a slanted top and a slanted top support column; the slanted top structure is located on the outside of the flat top, the rear mold core comprises a slanted top limiting hole and a flat top guide hole, the top end surface of the flat top comprises a glue position surface 1 and a glue position surface 2 in a stepped structure; the glue position surface 1 and the glue position surface 2 are consistent in angle with the inclined surface of the flat top guide hole outlet of the rear mold core, and the bottom end of the flat top is movably connected to the ejector pin fixing plate.

[0007] Preferably, the inclined top support column is fixed to the ejector fixing plate by screws, an inclined top slide rail is laterally provided at the upper end of the inclined top support column, and the bottom end of the inclined top is movably connected to the inclined top slide rail by an insert.

[0008] Preferably, the flat tops are movable through the rear mold core through the flat top guide holes, and the flat tops are distributed on the left and right sides with the long center axis of the rear mold core as the axis of symmetry.

[0009] Preferably, the inclined top is movable through the rear mold core through the inclined top limiting hole, and the inclined top is distributed on the left and right sides with the long center axis of the rear mold core as the symmetry axis.

[0010] Preferably, the inclined top glue surface, the first glue surface and the second glue surface are in contact with the product.

[0011] Preferably, the angle of the inclined top glue surface is consistent with the inclined surface of the inclined top limiting hole outlet of the rear mold core.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top provided by the utility model is designed to meet the production and manufacturing needs of various plastic products with complex shapes. Through various improvements in structural design, it is able to support new processes. According to the appearance shape of multiple inclined surfaces of the product, the top of the flat top is designed to be a stepped rubber surface inclined surface structure, thereby increasing the force area of ​​the flat top on the injection molded product; through the combination of structural design and optimized process, the injection molded product has more contact with the flat top, reducing the pulling of the inclined top on the injection molded product, avoiding the difficulty in removing or straining the injection molded product caused by too tight holding of the inclined top during molding, and can be widely applied to the production and manufacturing of various plastic products with complex shapes.

[0014] 2. The utility model sets a flat top and designs the top of the flat top to be composed of a glue surface 1 and a glue surface 2 with a stepped structure. On the one hand, it can increase the force area of ​​the flat top on the product, so that the product has more contact with the flat top. On the other hand, it can also reduce the pulling of the inclined top on the product. During demoulding, the product is directly ejected during the upward movement of the flat top, preventing various plastic products with complex shapes from sticking to the inclined top all the time, and avoiding the difficulty in removing or straining caused by the product holding the inclined top too tightly and being pulled by the inclined top, thereby completing demoulding well, greatly reducing the generation of defective products, and reducing production costs.

[0015] 3. The utility model solves the problem that when all the inclined ejectors of a complex structure product move in the same direction and the inclined ejector is ejected during the molding process, the product hugs the inclined ejector, causing the product to move with the inclined ejector, making it difficult to remove the product or causing the product to be stretched, affecting production efficiency and product quality; the bone position or groove in the inclined direction of the inclined ejector is flattened or the ejection is quickly blocked to prevent the product from being pulled by the inclined ejector and moving with the inclined ejector, thereby reducing the defective rate and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional external structure of the inclined ejection pulling device in the ejection state according to an embodiment of the utility model;

[0017] Figure 2 This is a schematic top view of the structure of the inclined ejection pulling device in the ejection state according to an embodiment of the utility model;

[0018] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the middle edge BB;

[0019] Figure 4 This is a schematic diagram of the three-dimensional appearance structure of the inclined ejection pulling device in the non-ejected state according to an embodiment of the utility model;

[0020] Figure 5 This is a schematic top view of the structure of the inclined ejection pulling device in the non-ejected state according to an embodiment of the utility model;

[0021] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the middle edge CC;

[0022] Figure 7 This is a schematic diagram of the three-dimensional appearance structure of the rear mold core of the inclined top pulling device according to an embodiment of the utility model;

[0023] Figure 8 This is a schematic top view of the rear mold core of the inclined top pulling device according to an embodiment of the utility model;

[0024] Figure 9 for Figure 8Schematic diagram of the cross-sectional structure along the middle line AA;

[0025] Figure 10 This is a schematic diagram of the main structure of the flat top of the inclined top pulling device according to an embodiment of the utility model;

[0026] Figure 11 This is a schematic diagram of the three-dimensional appearance structure of the flat top of the inclined top pulling device according to an embodiment of the utility model;

[0027] Figure 12 This is a schematic diagram of the main structure of the inclined roof structure of the inclined roof pulling device according to an embodiment of the utility model;

[0028] Figure 13 for Figure 12 Schematic diagram of the cross-sectional structure along the middle edge DD.

[0029] In the figure: 1. Slanted top structure; 101. Slanted top; 102. Slanted top support column; 103. Slanted top slide rail; 2. Flat top; 201. Glue surface one; 202. Glue surface two; 3. Product; 4. Back mold core; 401. Slanted top limit hole; 402. Flat top guide hole; 5. Ejector pin fixing plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0031] See also Figure 1-13 Aiming at the production and manufacturing needs of various plastic products with complex shapes, the utility model provides a plastic mold flat top positioning and prevention device for preventing the product from being pulled by the inclined top, comprising an inclined top structure 1, a flat top 2, a product 3, a rear mold core 4, and an ejector pin fixing plate 5; the inclined top structure 1 comprises an inclined top 101 and an inclined top support column 102; the inclined top structure 1 is located on the outside of the flat top 2, the rear mold core 4 comprises an inclined top limiting hole 401 and a flat top guide hole 402, the top surface of the flat top 2 is a step-shaped glue position surface 1 201 and a glue position surface 202; the glue position surface 1 201 and the glue position surface 202 are consistent with the outlet inclined surface angle of the flat top guide hole 402 of the rear mold core 4, and the bottom end of the flat top 2 is movably connected to the ejector pin fixing plate 5.

[0032] The inclined top support column 102 is fixed to the ejector pin fixing plate 5 by screws, and an inclined top slide rail 103 is horizontally provided at the upper end of the inclined top support column 102. The bottom end of the inclined top 101 is movably connected to the inclined top slide rail 103 by an insert. The flat top 2 is movable through the rear mold core 4 through the flat top guide hole 402, and the flat top 2 is distributed on the left and right sides with the long central axis of the rear mold core 4 as the axis of symmetry. The inclined top 101 is movable through the rear mold core 4 through the inclined top limiting hole 401, and the inclined top 101 is distributed on the left and right sides with the long central axis of the rear mold core 4 as the axis of symmetry. The glue surface of the inclined top 101, the glue surface one 201 and the glue surface two 202 are in contact with the product 3, and the glue surface of the inclined top 101 is consistent with the outlet bevel angle of the inclined top limiting hole 401 of the rear mold core 4.

[0033] The working principle of this utility model is:

[0034] The top surface of the flat top is designed to be a glue surface 1 and a glue surface 2 with a stepped structure. When the mold of various complex-shaped plastic products is completed and cooled and formed, when the mold is ejected, the ejector fixing plate 5 pushes the inclined top structure 1 and the flat top 2 on both sides, passes through the inclined top limiting hole 401 and the flat top guide hole 402 of the rear mold core 4, and at the same time supports the product 3 to move in the mold opening direction. After moving a certain distance, since the inclined top limiting hole 401 has been stuck with the inclined top 101, the inclined top 101 will slowly move obliquely in the opposite direction of the undercut. At this time, the stepped top of the flat top 2 will fix the product 3, and the glue surface 1 201 and the glue surface 2 202 of the flat top 2 02 is in full contact with product 3, with a large force-bearing area, and continues to move in the mold opening direction under the action of the flat top guide hole 402, preventing product 3 from moving outward with the inclined top 101, so that the inclined top 101 is separated from the adhesion of product 3, completing the separation action, and the product demoulding is completed. The product can be ejected smoothly without causing strain or sticking to the inclined top. By setting the top shape of the flat top to a stepped top, the force-bearing area of ​​the flat top on the product is increased, so that the product has more contact with the flat top, reducing the pulling of the inclined top on the product, avoiding the difficulty of taking out or strain caused by the product being too sticky to the inclined top, thereby reducing the output of defective products and improving production efficiency.

[0035] The utility model has been tested under confidentiality conditions, and the results show that it can better solve the problem that all the inclined tops of complex structure products move in the same direction, and when the inclined top is ejected during the molding process, the product hugs the inclined top, causing the product to move with the inclined top, making it difficult to remove the product or the product is stretched, affecting production efficiency and product quality. The top is flattened or the ejection is quickly blocked at the bone position or groove in the inclined direction of the inclined top to prevent the product from being pulled by the inclined top and moving with the inclined top, thereby reducing the defective rate, improving production efficiency and reducing production costs.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top, characterized by: The invention comprises an inclined top structure (1), a flat top (2), a product (3), a rear mold core (4), and an ejector pin fixing plate (5); the inclined top structure (1) comprises an inclined top (101) and an inclined top support column (102); the inclined top structure (1) is located on the outside of the flat top (2); the rear mold core (4) comprises an inclined top limiting hole (401) and a flat top guide hole (402); the top end surface of the flat top (2) is a glue position surface 1 (201) and a glue position surface 2 (202) in a stepped inclined surface structure; the glue position surface 1 (201) and the glue position surface 2 (202) are consistent with the outlet inclined surface angle of the flat top guide hole (402) of the rear mold core (4); the bottom end of the flat top (2) is movably connected to the ejector pin fixing plate (5).

2. The device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top according to claim 1, characterized in that: The inclined top support column (102) is fixed to the ejector pin fixing plate (5) by screws, and an inclined top slide rail (103) is transversely provided at the upper end of the inclined top support column (102), and the bottom end of the inclined top (101) is movably connected to the inclined top slide rail (103) by a plug.

3. The device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top according to claim 1, characterized in that: The flat top (2) moves through the rear mold core (4) through the flat top guide hole (402), and the flat top (2) is distributed on the left and right sides with the long center axis of the rear mold core (4) as the symmetry axis.

4. The device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top according to claim 1, characterized in that: The inclined top (101) moves through the rear mold core (4) through the inclined top limiting hole (401), and the inclined top (101) is distributed on the left and right sides with the long central axis of the rear mold core (4) as the symmetry axis.

5. The device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top according to claim 1, characterized in that: The glue surface of the inclined top (101), the glue surface one (201) and the glue surface two (202) are in contact with the product (3).

6. The device for positioning the flat top of a plastic mold to prevent the product from being pulled by the inclined top according to claim 1, characterized in that: The glue position surface of the inclined top (101) is consistent with the angle of the outlet inclined surface of the inclined top limiting hole (401) of the rear mold core (4).

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