Injection mold for roller group

Abstract

The utility model provides an injection mold for a roller set, and relates to the technical field of injection molds, the injection mold comprises a fixed mold, a movable mold and a back plate, a mounting cavity and a plurality of forming cavities are formed in the fixed mold, an injection main pipe is arranged in the mounting cavity, the injection main pipe is communicated with an injection nozzle, and the injection main pipe is connected with a plurality of injection branch pipes located in the mounting cavity; the ejection branch pipes are communicated with the forming cavities and located in the center areas of the forming cavities, and a plurality of forming bases corresponding to the forming cavities one to one are arranged on the movable mold; according to the device, injection molding and automatic demolding of a plurality of rollers can be achieved at a time, demolding is achieved without manual intervention, the operation difficulty and labor intensity of demolding are greatly reduced, the injection molding efficiency is improved, in addition, water cooling is matched, the cooling time is further shortened, and the production efficiency is improved. When the temperature of the cooling water rises, the cooler works to ensure that the temperature of the water is effectively reduced, and the water can be reused.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a roller assembly. Background Art

[0002] An injection mold is a tool for producing plastic products. It is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by an injection molding machine. After cooling and solidification, a molded product is obtained. Injection molds are divided into two types according to their molding characteristics: thermosetting plastic molds and thermoplastic plastic molds.

[0003] Rollers specifically refer to ball bearings. Roller bearings are very commonly used parts in the mechanical field. Their production is completed using injection mold processing. The injection mold includes a fixed mold and a movable mold. The movable mold is connected to a back plate, and the back plate is connected to a driving component to realize the movement of the movable mold to the fixed mold and thus complete the mold closing and injection molding process.

[0004] As injection molds are gradually formed, the number of molds used in factories is increasing. Today's injection molds cannot effectively and quickly remove the molds after condensation, resulting in a long time to remove the molds each time.

[0005] Announcement No. CN212666557U proposes an injection mold structure that is convenient for mold removal. The device allows the support column to eject the mold that has been injected inside the mold frame, solving the problem that it is cumbersome to remove the injected mold, resulting in a long time to remove the mold; however, the device can only realize the injection and demolding of one workpiece at a time, and the injection efficiency needs to be improved. In addition, the cooling time after the molten plastic particles are injected into the injection mold is long, and the cooling time needs to be further shortened. Utility Model Content

[0006] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose an injection mold for a roller assembly.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A roller assembly injection mold comprises a fixed mold, a movable mold and a back plate. A mounting cavity and a plurality of molding cavities are formed in the fixed mold. An injection main pipe is arranged in the mounting cavity. The injection main pipe is connected to a nozzle and is connected to a plurality of injection branch pipes in the mounting cavity. The injection branch pipes correspond to the molding cavities one by one and are connected and are located in the central area of ​​the molding cavities. A plurality of molding seats corresponding to the molding cavities one by one are arranged on the movable mold. Each molding seat is provided with a through hole. An ejection assembly fixed on the back plate is matched in the through hole. A conveying assembly is arranged on the back plate and is connected to the ejection assembly. A cooler is arranged in the ejection assembly.

[0009] This device can realize injection molding and automatic demoulding of multiple rollers at one time, and does not require manual intervention to achieve demoulding, which greatly reduces the difficulty and labor intensity of demoulding operation, improves the efficiency of injection molding, and further shortens the cooling time with water cooling. When the cooling water temperature rises, the cooler works to ensure that the water temperature is effectively reduced so that it can be reused.

[0010] Furthermore, the ejection assembly includes a cylinder and an ejection roller. A plurality of cylinders corresponding to the forming seats are arranged on the back plate. The cylinders are connected to the ejection rollers which move along the through holes and are matched with the through holes.

[0011] The above scheme realizes synchronous automatic demoulding of a plurality of rollers after one injection molding is completed through the ejection assembly.

[0012] Furthermore, the conveying assembly includes a suction pump, a cooling main pipe and a hose. The suction pump and the cooling main pipe are arranged on the back plate. The suction pump is connected to the cooling main pipe. The cooling main pipe is connected to a plurality of hoses corresponding to the ejection rollers one by one. A cooling cavity connected to the hoses is formed in the ejection roller, and a cooler is arranged in the cooling cavity.

[0013] The above scheme realizes the injection of water into the cooling chambers inside several ejector rollers at the same time through the conveying component, and then cools with the cooler to accelerate the cooling time of the rollers and realize the recycling of cooling water.

[0014] Furthermore, the back plate is provided with distance sensors corresponding to the ejection rollers one-to-one, and the distance sensors correspond to the cylinders one-to-one and are electrically connected.

[0015] The above scheme can more accurately calculate the real-time movement position of the ejector roller through the distance sensor, thereby better completing the injection molding and subsequent ejection and demoulding processes.

[0016] Furthermore, a temperature sensor electrically connected to the cooler is arranged in the cooling cavity.

[0017] In the above scheme, when the temperature of the cooling water rises, the temperature sensor immediately feeds back a signal to the controller, and then the controller controls the cooler to work again to ensure that the temperature of the water is effectively reduced so that it can be reused.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] Compared with the existing technology, this device can realize injection molding and automatic demolding of multiple rollers at a time, and does not require manual intervention to achieve demolding, which greatly reduces the operational difficulty and labor intensity of demolding, and improves the efficiency of injection molding. In addition, water cooling further shortens the cooling time. When the cooling water temperature rises, the temperature sensor immediately feeds back the signal to the controller, and then the controller controls the cooler to work again to ensure that the water temperature is effectively reduced so that it can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 Schematic diagram for installation of cooler and temperature sensor;

[0022] Reference numerals:

[0023] 1. Fixed mold; 101. Nozzle; 11. Mounting cavity; 12. Injection main pipe; 13. Injection branch pipe; 14. Molding cavity; 2. Moving mold; 21. Molding seat; 22. Through hole; 23. Ejector roller; 24. Cylinder; 3. Back plate; 31. Cooling main pipe; 32. Hose; 33. Suction pump; 4. Cooler; 5. Temperature sensor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0025] like Figure 1 and Figure 2 As shown, an injection mold for a roller assembly includes a fixed mold 1, a movable mold 2 and a back plate 3. An installation cavity 11 and a plurality of molding cavities 14 are formed in the fixed mold 1. An injection main pipe 12 is arranged in the installation cavity 11. The injection main pipe 12 is connected to a nozzle 101 and is connected to a plurality of injection branch pipes 13 in the installation cavity 11. The injection branch pipes 13 correspond to the molding cavities 14 one by one and are connected and are located in the central area of ​​the molding cavity 14. A plurality of molding seats 21 corresponding to the molding cavities 14 one by one are arranged on the movable mold 2. Each molding seat 21 is provided with a through hole 22. An ejection assembly fixed on the back plate 3 is matched in the through hole 22. A conveying assembly is arranged on the back plate 3 and the conveying assembly is connected to the ejection assembly. A cooler 4 is arranged in the ejection assembly.

[0026] Further refinement of the embodiment of the present utility model is as follows: Figure 1 As shown, the ejection assembly includes a cylinder 24 and an ejection roller 23. The back plate 3 is provided with a plurality of cylinders 24 corresponding to the forming seats 21 one by one. The cylinders 24 are connected to the ejection rollers 23 that move along the through holes 22 and are adapted to the through holes 22.

[0027] Further refinement of the embodiment of the present utility model is as follows: Figure 1 and Figure 2 As shown, the conveying assembly includes a suction pump 33, a cooling main pipe 31 and a hose 32. The suction pump 33 and the cooling main pipe 31 are provided on the back plate 3. One end of the suction pump 33 is connected to the water tank through the hose 32. The water tank is not shown in the figure. The other end of the suction pump 33 is connected to the cooling main pipe 31. The cooling main pipe 31 is connected to a plurality of hoses 32 corresponding to the ejection rollers 23. A cooling cavity connected to the hose 32 is formed in the ejection roller 23. A cooler 4 is provided in the cooling cavity.

[0028] For further optimization, a temperature sensor 5 electrically connected to the cooler 4 is also provided in the cooling chamber.

[0029] It should be noted that the cylinder 24, the suction pump 33, the cooler 4 and the temperature sensor 5 are all electrically connected to the controller, which is not shown in the figure.

[0030] The workflow of this utility model:

[0031] First, the driving component drives the back plate 3 and the movable mold 2 to move, and then the movable mold 2 and the fixed mold 1 are closed. At the same time, the controller controls the suction pump 33 to work to draw water from the water tank and inject it into several cooling chambers at the same time with the help of the conveying component. After the cold water is injected, the controller controls several coolers 4 to work synchronously to achieve rapid cooling of the water. After the water source is completely cooled, the molten plastic particles are injected into the injection main pipe 12 through the nozzle 101. Then the molten plastic particles continue to move along the injection branch pipe 13 and are finally injected into several molding cavities 14 at the same time. The present application adopts a single-point center feeding of the molding cavity 14 to make the product feeding more uniform. After the raw material injection is completed, the cooling process can be started. The mold in the application has added water cooling on the basis of natural cooling, so that the cooling time of the roller is further shortened, and the injection molding of several rollers is realized at the same time. After all the rollers are cooled, the driving component immediately drives the movable mold 2 to cooperate with the back plate 3 away from the fixed mold 1. At this time, the molded roller will adhere to the molding seat 21 of the movable mold 2, and then the controller controls several cylinders 24 to work synchronously, so that several ejection rollers 23 move synchronously to the right and extend to the outside of the molding seat 21 (in the initial state, the cylinder 24 drives the right side of the ejection roller 23 to be flush with the surface of the molding seat 21), and then the batch ejection and demolding of the workpiece can be realized. After the rollers are collected after a round of processing, a new round of roller injection molding process can be started;

[0032] Compared with the prior art, the device can realize injection molding and automatic demolding of multiple rollers at one time, and does not require manual intervention to achieve demolding, which greatly reduces the operational difficulty and labor intensity of demolding, and improves the efficiency of injection molding. In addition, water cooling further shortens the cooling time. When the cooling water temperature rises, the temperature sensor 5 immediately feeds back the signal to the controller, and then the controller controls the cooler 4 to work again to ensure that the water temperature is effectively reduced so that it can be reused.

[0033] In some embodiments, a distance sensor corresponding to the ejection roller 23 is provided on the back plate 3, and the distance sensor corresponds to the cylinder 24 one by one and is electrically connected. The distance sensor is not shown in the figure; this embodiment can more accurately calculate the real-time movement position of the ejection roller 23 through the distance sensor, thereby better completing the injection molding and subsequent ejection and demolding processes.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. An injection mold for a roller assembly, comprising a fixed mold (1), a movable mold (2) and a back plate (3), characterized in that: The fixed mold (1) is formed with a mounting cavity (11) and a plurality of molding cavities (14). The mounting cavity (11) is provided with an injection main pipe (12). The injection main pipe (12) is connected to a nozzle (101) and is connected to a plurality of injection branch pipes (13) located in the mounting cavity (11). The injection branch pipes (13) correspond to the molding cavities (14) one by one and are connected and located in the central area of ​​the molding cavities (14). The movable mold (2) is provided with a plurality of molding seats (21) corresponding to the molding cavities (14) one by one. Each molding seat (21) is provided with a through hole (22). An ejection assembly fixedly mounted on a back plate (3) is matched in the through hole (22). A conveying assembly is provided on the back plate (3) and is connected to the ejection assembly. A cooler (4) is provided in the ejection assembly.

2. The roller assembly injection mold according to claim 1, characterized in that: The ejection assembly comprises a cylinder (24) and an ejection roller (23); a plurality of cylinders (24) corresponding one to one with the forming seats (21) are arranged on the back plate (3); the cylinders (24) are connected to the ejection rollers (23) which move along the through holes (22) and are matched with the through holes (22).

3. The roller assembly injection mold according to claim 1, characterized in that: The conveying assembly comprises a suction pump (33), a cooling main pipe (31) and a hose (32); the suction pump (33) and the cooling main pipe (31) are arranged on the back plate (3); the suction pump (33) is connected to the cooling main pipe (31); the cooling main pipe (31) is connected to a plurality of hoses (32) corresponding to the ejection rollers (23) in a one-to-one manner; a cooling cavity connected to the hoses (32) is formed in the ejection roller (23); a cooler (4) is arranged in the cooling cavity.

4. The roller assembly injection mold according to claim 2, characterized in that: The back plate (3) is provided with a distance sensor corresponding one-to-one to the ejection roller (23); the distance sensor corresponds one-to-one to the cylinder (24) and is electrically connected.

5. The roller assembly injection mold according to claim 3, characterized in that: A temperature sensor (5) electrically connected to the cooler (4) is arranged in the cooling chamber.

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