Injection mold for plastic product production

Abstract

The utility model discloses an injection mold for producing plastic products, which comprises a fixed mold and a movable mold, the top surface of the fixed mold is fixedly connected with a top frame through a guide rod, the movable mold is arranged between the top frame and the fixed mold, the guide rod penetrates through the movable mold and is connected with the movable mold in a sliding manner, the top surface of the fixed mold is provided with a lower mold cavity, and the bottom surface of the movable mold is provided with an upper mold cavity. And electric cylinders are fixedly mounted on the top surface of the movable mold and the bottom surface of the fixed mold. The high-temperature-resistant rubber sheet and the embedded groove are adopted, the high-temperature-resistant rubber sheet is adhered to the interior of the embedded groove through the adhesive layer, the outer surface of the high-temperature-resistant rubber sheet is flush with the opening of the embedded groove, and the diameter of the high-temperature-resistant rubber sheet is equal to the inner diameter of the embedded groove, so that gaps are avoided, and the service life of the high-temperature-resistant rubber sheet is prolonged. Therefore, a boss is prevented from being formed on the surface of the plastic product after injection molding, the surface quality and the yield are improved, the allowable error between the ejector rod and the channel is increased, and the manufacturing is not required to be too fine, so that the process requirement is reduced, and the convenience of production and use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for producing plastic products. Background Art

[0002] Although the structure of the injection mold may vary due to the different types and properties of plastics, the shape and structure of plastic products, and the type of injection molding machine, the basic structure is the same. The mold is mainly composed of a pouring system, a temperature control system, molding parts, and structural parts. The pouring system and molding parts are the parts that are in direct contact with the plastic and change with the plastic and the product. They are the most complex and most variable parts of the mold, and require the highest processing finish and precision. The injection mold consists of a movable mold and a fixed mold. The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine.

[0003] After searching, it was found that the publication number is CN216658794U, and the name is an injection mold for the production of plastic products. The application proposes that when plastic products are injection molded, the existing mold usually has an ejection mechanism in the lower mold to facilitate the demolding of the product. However, during the mold opening process, the cooled and molded product may adhere to the upper mold cavity, resulting in an unsmooth demolding process and affecting the demolding efficiency. By utilizing the setting method in which the ejector block and the demolding device are coordinated, when the upper mold slides through the ejector block, the ejector block pushes the slide rod, so that the slide rod pushes the push rod, so that the push rod pushes the molded product attached to the upper mold cavity, thereby improving the demolding process and improving the demolding efficiency. At the same time, the setting method in which the cylinder, the push plate and the ejector rod are coordinated can automatically eject the product under normal demolding conditions, saving manpower and improving production efficiency. The invention improves production efficiency, avoids the inconvenience of manual product removal and the disadvantage of causing damage to the product, and is provided with a fixing frame, so that the connection between the cylinder and the base is stable, the loading and unloading efficiency is high, the operation is convenient, and it is more convenient to maintain. However, in actual use, the push rod needs to have a through hole for movement, and the push rod and the through hole need to be closely matched. Otherwise, during injection molding, the liquid plastic will flow into the gap, resulting in convex marks, affecting the apparent quality. The close fit between the push rod and the through hole has extremely high dimensional requirements, high processing precision, and high production cost. As the push rod continues to move, wear increases, and the size will also change. It needs to be replaced frequently, and the cost is also high. At the same time, the ejector in this application also faces the same problem, and further improvements can be made. In addition, the ejector can only push the molded product to a certain height, and it is still not convenient for the staff to take it, and further improvements can be made.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides an injection mold for producing plastic products, which has the advantages of improving surface quality and convenience of unloading, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above advantages of improving surface quality and convenience of unloading, the specific technical solutions adopted by the utility model are as follows:

[0009] A plastic product production injection mold comprises a fixed mold and a movable mold, wherein the top surface of the fixed mold is fixedly connected to an ejector frame via a guide rod, and a movable mold is arranged between the ejector frame and the fixed mold, and the guide rod passes through the movable mold and is slidably connected to the movable mold, the top surface of the fixed mold is provided with a lower mold cavity, the bottom surface of the movable mold is provided with an upper mold cavity, and both the top surface of the movable mold and the bottom surface of the fixed mold are fixedly mounted with electric cylinders, and the output ends of the electric cylinders are fixedly connected with ejector rods, the top surface of the movable mold passes through the upper mold cavity and the bottom surface of the fixed mold passes through the lower mold cavity, and channels are provided on the top surface of the movable mold, which passes through the upper mold cavity, and the bottom surface of the fixed mold passes through the lower mold cavity, and one end of the channel is respectively located on the top surface of the upper mold cavity and the bottom surface of the lower mold cavity, and both have embedded grooves, and high-temperature resistant rubber sheets are fixedly bonded to the inside of the embedded grooves via an adhesive layer, and the ejector rod extends through the inside of the channel and abuts against the inner surface of the high-temperature resistant rubber sheet.

[0010] Furthermore, the outer surface of the high temperature resistant rubber sheet is flush with the opening of the embedded groove, and the diameter of the high temperature resistant rubber sheet is equal to the inner diameter of the embedded groove.

[0011] Furthermore, an injection tube is fixedly connected through one end of the fixed mold, and the injection tube is connected through the lower mold cavity.

[0012] Furthermore, a base is fixedly mounted on the bottom surface of the fixed mold, and the height of the base is greater than the height of the electric cylinder.

[0013] Furthermore, a cylinder is fixedly mounted on the top surface of the top frame, and the bottom surface of the piston rod of the cylinder is fixedly connected to the top surface of the movable mold.

[0014] Furthermore, the electric cylinders are arranged in multiple groups, and the electric cylinders are used in conjunction with a controller.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides an injection mold for producing plastic products, which has the following beneficial effects:

[0017] (1) The utility model adopts a high temperature resistant rubber sheet and an embedded groove. The high temperature resistant rubber sheet is adhered to the inside of the embedded groove by an adhesive layer. The outer surface of the high temperature resistant rubber sheet is flush with the opening of the embedded groove, and the diameter of the high temperature resistant rubber sheet is equal to the inner diameter of the embedded groove, thereby avoiding the generation of gaps and thus avoiding the presence of bosses on the surface of the plastic product after injection molding, thereby improving the surface quality and yield rate, increasing the allowable error between the ejector pin and the channel, and eliminating the need for overly fine manufacturing, thereby reducing process requirements and improving the convenience of production and use.

[0018] (2) The utility model adopts electric cylinders distributed up and down. When the plastic product is injected, the cylinder pushes the movable mold to move down and close with the fixed mold. Then, the injection molding is carried out through the injection tube. After cooling and molding, the electric cylinder located at the bottom first extends. At the same time, the cylinder shortens. The electric cylinder located at the bottom pushes the push rod located at the bottom to move up, and pushes the center position of the high-temperature resistant rubber sheet located at the bottom to move up and deform, so that the molded plastic product is separated from the lower mold cavity. The plastic product moves up with the movable mold. Then, the electric cylinder located at the top extends, pushes the push rod located at the top to move down, and pushes the center position of the high-temperature resistant rubber sheet located at the top to move down, and pushes the plastic product out of the upper mold cavity. Demolding is completed. The staff can reach their hands under the movable mold to catch the fallen plastic products, and unloading is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the external structure of an injection mold for producing plastic products proposed by the utility model;

[0021] Figure 2 It is a structural schematic diagram of the fixed mold proposed by the utility model;

[0022] Figure 3 It is a structural schematic diagram of the movable mold proposed by the utility model;

[0023] Figure 4 The utility model discloses an internal structure schematic diagram of an injection mold for producing plastic products.

[0024] In the figure:

[0025] 1. Fixed mold; 2. Moving mold; 3. Ejector frame; 4. Cylinder; 5. Guide rod; 6. Electric cylinder; 7. Upper mold cavity; 8. Channel; 9. Ejector rod; 10. High temperature resistant rubber sheet; 11. Embedded groove; 12. Adhesive layer; 13. Injection tube; 14. Base; 15. Lower mold cavity. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the utility model, an injection mold for producing plastic products is provided.

[0028] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4As shown, according to an embodiment of the utility model, an injection mold for producing plastic products comprises a fixed mold 1 and a movable mold 2, the top surface of the fixed mold 1 is fixedly connected to a top frame 3 through a guide rod 5, and a movable mold 2 is arranged between the top frame 3 and the fixed mold 1, and the guide rod 5 penetrates the movable mold 2 and is slidably connected to the movable mold 2, and the guide rod 5 guides the lifting of the movable mold 2, and a lower mold cavity 15 is provided on the top surface of the fixed mold 1, and an upper mold cavity 7 is provided on the bottom surface of the movable mold 2, and an electric cylinder 6 is fixedly installed on the top surface of the movable mold 2 and the bottom surface of the fixed mold 1, and the output end of the electric cylinder 6 is fixedly connected to a push rod 9, and the top of the movable mold 2 A channel 8 is provided on the upper mold surface through the upper mold cavity 7 and the bottom surface of the fixed mold 1 through the lower mold cavity 15, and one end of the channel 8 is respectively located at the top surface of the upper mold cavity 7 and the bottom surface of the lower mold cavity 15, and an embedded groove 11 is provided, and a high-temperature resistant rubber sheet 10 is fixedly bonded to the inside of the embedded groove 11 through an adhesive layer 12, and a push rod 9 extends through the inside of the channel 8 and abuts against the inner surface of the high-temperature resistant rubber sheet 10. The push rod 9 provides support for the high-temperature resistant rubber sheet 10 during injection molding, wherein the outer surface of the high-temperature resistant rubber sheet 10 is flush with the opening of the embedded groove 11, and the high-temperature resistant rubber sheet The diameter of 10 is equal to the inner diameter of the embedded groove 11, which avoids the generation of gaps, thereby avoiding the presence of bosses on the surface of the plastic product after injection molding, improving the surface quality and yield rate, and the allowable error between the ejector 9 and the channel 8 becomes larger, and the manufacturing does not need to be too fine, thereby reducing the process requirements and improving the convenience of production and use. At the same time, when the plastic product is injected, the cylinder 4 pushes the movable mold 2 to move down and close the mold with the fixed mold 1, and then the injection molding is carried out through the injection tube 13. After cooling and molding, the electric cylinder 6 located below first extends, and at the same time, the cylinder 4 shortens The electric cylinder 6 located at the bottom pushes the push rod 9 located at the bottom to move upward, and pushes the center position of the high-temperature resistant rubber sheet 10 located at the bottom to move upward and deform, so that the molded plastic product is separated from the lower mold cavity 15, and the plastic product moves upward with the movable mold 2. Subsequently, the electric cylinder 6 located at the top extends, pushing the push rod 9 located at the top to move downward, pushing the center position of the high-temperature resistant rubber sheet 10 located at the top to move downward, and pushing the plastic product out of the upper mold cavity 7, and demolding is completed. The staff can reach their hands under the movable mold 2 to catch the fallen plastic products, and unloading is more convenient and quick.

[0029] In one embodiment, an injection tube 13 is fixedly connected through one end of the fixed mold 1, and the injection tube 13 is connected through the lower mold cavity 15, which is a common injection molding structure and will not be described in detail here.

[0030] In one embodiment, a base 14 is fixedly mounted on the bottom surface of the fixed mold 1, and the height of the base 14 is greater than the height of the electric cylinder 6. The base 14 is convenient for placement and installation, and at the same time, protects the electric cylinder 6 located below.

[0031] In one embodiment, a cylinder 4 is fixedly mounted on the top surface of the top frame 3, and the bottom surface of the piston rod of the cylinder 4 is fixedly connected to the top surface of the movable mold 2, which is a common structure in the art.

[0032] In one embodiment, the electric cylinders 6 are arranged in multiple groups, and the electric cylinders 6 are used in conjunction with a controller to facilitate operation by staff.

[0033] Working principle:

[0034] The outer surface of the high temperature resistant rubber sheet 10 is flush with the opening of the embedded groove 11, and the diameter of the high temperature resistant rubber sheet 10 is equal to the inner diameter of the embedded groove 11, which avoids the generation of gaps, thereby avoiding the presence of bosses on the surface of the plastic product after injection molding, improving the surface quality and yield rate, and the allowable error between the ejector 9 and the channel 8 becomes larger, and the manufacturing does not need to be too fine, thereby reducing the process requirements and improving the convenience of production and use. At the same time, when the plastic product is injected, the cylinder 4 pushes the movable mold 2 to move down and close the mold with the fixed mold 1, and then the injection molding is carried out through the injection molding tube 13. After cooling and molding, the electric cylinder 6 located below First, it extends. At the same time, the cylinder 4 shortens, and the electric cylinder 6 located at the bottom pushes the push rod 9 located at the bottom to move upward, and pushes the center position of the high-temperature resistant rubber sheet 10 located at the bottom to move upward and deform, so that the molded plastic product is separated from the lower mold cavity 15, and the plastic product moves upward with the movable mold 2. Subsequently, the electric cylinder 6 located at the top extends, pushing the push rod 9 located at the top to move downward, and pushes the center position of the high-temperature resistant rubber sheet 10 located at the top to move downward, and pushes the plastic product out of the upper mold cavity 7, and demolding is completed. The staff can reach their hands under the movable mold 2 to catch the fallen plastic products, and unloading is more convenient and quick.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold for producing plastic products, characterized in that: The invention comprises a fixed mold (1) and a movable mold (2), wherein the top surface of the fixed mold (1) is fixedly connected to a top frame (3) via a guide rod (5), and a movable mold (2) is arranged between the top frame (3) and the fixed mold (1), and the guide rod (5) penetrates the movable mold (2) and is slidably connected to the movable mold (2), a lower mold cavity (15) is provided on the top surface of the fixed mold (1), an upper mold cavity (7) is provided on the bottom surface of the movable mold (2), and an electric cylinder (6) is fixedly installed on the top surface of the movable mold (2) and the bottom surface of the fixed mold (1), and the output end of the electric cylinder (6) is fixedly connected to the movable mold (2) and the output end of the electric cylinder (6) is fixedly connected to the movable mold (2) and the top surface of the movable mold (2) and the bottom surface of the fixed mold (1). A push rod (9) is connected, and a channel (8) is provided on the top surface of the movable mold (2) and penetrates the upper mold cavity (7) and the bottom surface of the fixed mold (1) and penetrates the lower mold cavity (15), and one end of the channel (8) is respectively located on the top surface of the upper mold cavity (7) and the bottom surface of the lower mold cavity (15), and an embedded groove (11) is provided, and a high-temperature resistant rubber sheet (10) is fixedly bonded inside the embedded groove (11) through an adhesive layer (12), and the push rod (9) extends through the inside of the channel (8) and abuts against the inner surface of the high-temperature resistant rubber sheet (10).

2. An injection mold for producing plastic products according to claim 1, characterized in that: The outer surface of the high temperature resistant rubber sheet (10) is flush with the opening of the embedded groove (11), and the diameter of the high temperature resistant rubber sheet (10) is equal to the inner diameter of the embedded groove (11).

3. The injection mold for producing plastic products according to claim 1, characterized in that: An injection tube (13) is fixedly connected through one end of the fixed mold (1), and the injection tube (13) is connected through the lower mold cavity (15).

4. The injection mold for producing plastic products according to claim 1, characterized in that: A base (14) is fixedly mounted on the bottom surface of the fixed mold (1), and the height of the base (14) is greater than the height of the electric cylinder (6).

5. The injection mold for producing plastic products according to claim 1, characterized in that: A cylinder (4) is fixedly mounted on the top surface of the top frame (3), and the bottom surface of the piston rod of the cylinder (4) is fixedly connected to the top surface of the movable mold (2).

6. The injection mold for producing plastic products according to claim 1, characterized in that: The electric cylinders (6) are arranged in multiple groups, and the electric cylinders (6) are used in conjunction with a controller.

Images