Junction box cover injection mold easy to demold

Abstract

The utility model relates to the technical field of injection molds, in particular to a terminal box cover injection mold easy to demold, which comprises an upper mold base and a lower mold base, a fixed bottom plate is arranged at the bottom of the lower mold base, and injection molding hole pressing mold rods are arranged at four corners in the lower mold base. External threads are formed in the positions, located on the upper half sections, of the outer sides of the multiple sets of injection molding hole pressing mold rods, demolding sleeves are connected to the outer sides of the multiple sets of injection molding hole pressing mold rods in a sleeving mode, and internal threads used in cooperation with the external threads are formed in each set of demolding sleeves; the bottom ends of the multiple sets of injection molding hole pressing mold rods all extend into the fixed bottom plate and are connected with transmission belt wheels, and a transmission belt is connected between the two sets of transmission belt wheels on the front side and the rear side on the same side in a transmission mode. According to the injection mold, the cooled junction box cover can be quickly demolded after injection molding of the junction box cover is completed, the structure is simple, the operation is quick, the demolding effect is good, and the product quality is also obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a junction box cover which is easy to demould. Background Art

[0002] The junction box is one of the electrical auxiliary materials. The junction box is used as a transition at the joint of the wire. The wire tube is connected to the junction box, and the wires in the wire tube are connected in the junction box to protect and connect the wires. This is the junction box. The junction box generally consists of a junction box and a junction box cover. The junction box cover injection mold is a tool for producing the junction box cover. The existing junction box cover injection mold has low production efficiency. In order to improve production efficiency, save production costs, and increase the number of mold cavities, eight junction box cover plastic products can be molded at a time. Although the production cost is reduced, the demolding of the injection mold is inconvenient and the demolding effect is poor, resulting in a decrease in product quality.

[0003] Therefore, it is particularly important to design an easy-to-demold junction box cover injection mold to change the above-mentioned technical defects and improve overall practicality. Utility Model Content

[0004] The utility model aims to provide an easy-to-demold injection mold for a junction box cover, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A junction box cover injection mold that is easy to demold, comprises an upper mold base and a lower mold base, wherein a fixed bottom plate is arranged at the bottom of the lower mold base, injection hole die rods are arranged at the four corners inside the lower mold base, and external threads are provided on the outer sides of multiple groups of injection hole die rods and located in the upper half, and demolding sleeves are sleeved on the outer sides of multiple groups of injection hole die rods, and an internal thread used in conjunction with the external thread is provided inside each group of demolding sleeves, and the bottom ends of multiple groups of injection hole die rods extend to the inside of the fixed bottom plate and are connected to drive pulleys, and a drive belt is connected between the two groups of drive pulleys on the same front and rear sides, and a drive motor with a drive end facing upward is installed at the bottom of the two groups of drive pulleys located on the right side.

[0007] As a preferred solution of the utility model, a controller is arranged on the outer side of the upper mold base, wherein the controller and the driving motor are connected through a wire, and the connection method is electrical connection.

[0008] As a preferred solution of the utility model, the injection hole die rod and the demoulding sleeve are designed to be detachable, and the external structure size of the injection hole die rod is adapted to the internal structure size of the demoulding sleeve.

[0009] As a preferred solution of the utility model, the connection between the injection hole die rod and the demoulding sleeve is a threaded connection.

[0010] As a preferred solution of the utility model, the bottom of the injection hole die rod is connected to the transmission pulley through a rotating shaft rod, wherein the rotating shaft rod is rotatably connected to the bottom of the lower die seat through a bearing seat.

[0011] As a preferred solution of the utility model, a groove is provided inside the fixed base plate, and the drive motor is fixedly installed inside the groove by bolts.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, an easy-to-demold junction box cover injection mold is provided, and the structural cooperation of the injection hole mold pressing rod and the demoulding sleeve is utilized to realize rapid demoulding of the cooled junction box cover after the junction box cover is injection-molded. The utility model has the advantages of simple structure, fast operation, good demoulding effect, and significantly improved product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main view of the overall structure of the utility model;

[0015] Figure 2 This is the overall internal structure diagram of the utility model;

[0016] Figure 3 It is an enlarged schematic diagram of structure A of the utility model.

[0017] In the figure: 1, upper mold base; 2, lower mold base; 3, fixed base plate; 4, injection hole die rod; 401, external thread; 402, demoulding sleeve; 403, internal thread; 404, transmission pulley; 405, transmission belt; 406, driving motor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0020] An easy-to-demold junction box cover injection mold comprises an upper mold base 1 and a lower mold base 2. A fixed bottom plate 3 is arranged at the bottom of the lower mold base 2, and injection hole pressing rods 4 are arranged at the four corners inside the lower mold base 2.

[0021] In this embodiment, please refer to Figure 2 and Figure 3 , the outer sides of the multiple groups of injection hole die rods 4 and the upper sections are provided with external threads 401, the outer sides of the multiple groups of injection hole die rods 4 are sleeved with demoulding sleeves 402, the interior of each group of demoulding sleeves 402 is provided with internal threads 403 used in conjunction with the external threads 401, the bottom ends of the multiple groups of injection hole die rods 4 are extended to the interior of the fixed bottom plate 3 and are connected with drive pulleys 404, the two groups of drive pulleys 404 on the same side are connected with drive belts 405, and the bottoms of the two groups of drive pulleys 404 on the right side are both installed with drive motors 406 with the drive ends facing upward;

[0022] A controller is provided on the outer side of the upper mold base 1, wherein the controller and the drive motor 406 are connected by a wire, and the connection method is electrical connection. The injection hole mold rod 4 and the demolding sleeve 402 are designed to be detachable, and the external structure size of the injection hole mold rod 4 is adapted to the internal structure size of the demolding sleeve 402. The connection method between the injection hole mold rod 4 and the demolding sleeve 402 is threaded connection, and the bottom of the injection hole mold rod 4 is connected to the transmission pulley 404 through a rotating shaft, wherein the rotating shaft is rotatably connected to the bottom of the lower mold base 2 through a bearing seat, a groove is opened inside the fixed base plate 3, and the drive motor 406 is fixedly installed inside the groove by bolts.

[0023] The working process of the utility model is as follows: when using the junction box cover injection mold, the demoulding sleeve 402 is screwed on the upper end of the outer side of the injection hole die rod 4, and then the junction box cover is injection molded. At this time, four groups of injection hole die rods 4 distributed at four corners respectively form the assembly reserved inner holes of the junction box cover. When the injection molding is completed and ready for demoulding, the driving motor 406 is started by the controller, and with the cooperation of the transmission belt 405, the driving motor 406 drives the two groups of transmission pulleys 404 to rotate, so that each group of injection hole die rods 4 rotates. During the rotation, the injection hole die rods 4 rotate. The external thread of the rod 4 and the internal thread 403 of the demoulding sleeve 402 form a reaction force, and the junction box cover is slowly and gradually moved upwards under the drive of the thread, so that the demoulding sleeve 402 is completely separated from the injection hole molding rod 4. At this time, the staff can demould the junction box cover, and after demoulding, the demoulding sleeve 402 inside the reserved inner hole can be pulled out. By utilizing the structural cooperation of the injection hole molding rod 4 and the demoulding sleeve 402, the cooled junction box cover can be quickly demoulded after the injection molding of the junction box cover is completed. The structure is simple, the operation is fast, the demoulding effect is good, and the product quality is also significantly improved.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An easy-to-demold junction box cover injection mold, comprising an upper mold base (1) and a lower mold base (2), characterized in that: A fixed bottom plate (3) is arranged at the bottom of the lower mold base (2), and injection hole die rods (4) are arranged at the four corners inside the lower mold base (2). External threads (401) are provided on the outer sides of multiple groups of the injection hole die rods (4) and located in the upper half. Demolding sleeves (402) are sleeved on the outer sides of multiple groups of the injection hole die rods (4), and internal threads (403) used in conjunction with the external threads (401) are provided inside each group of the demoulding sleeves (402). The bottom ends of multiple groups of the injection hole die rods (4) extend to the inside of the fixed bottom plate (3) and are connected to drive pulleys (404). A drive belt (405) is connected between the two groups of the drive pulleys (404) on the same side, and a drive motor (406) with a drive end facing upward is installed at the bottom of the two groups of the drive pulleys (404) located on the right side.

2. The easy-to-release junction box cover injection mold according to claim 1, characterized in that: A controller is arranged on the outer side of the upper die seat (1), wherein the controller is connected to the driving motor (406) via a wire, and the connection is in an electrical manner.

3. The easy-to-release junction box cover injection mold according to claim 1, characterized in that: The injection hole die rod (4) and the demoulding sleeve (402) are designed to be detachable, and the external structure size of the injection hole die rod (4) is matched with the internal structure size of the demoulding sleeve (402).

4. The easy-to-release junction box cover injection mold according to claim 1, characterized in that: The connection between the injection hole die rod (4) and the demoulding sleeve (402) is a threaded connection.

5. The easy-to-release junction box cover injection mold according to claim 1, characterized in that: The bottom of the injection hole die rod (4) is connected to the driving pulley (404) via a rotating shaft, wherein the rotating shaft is rotatably connected to the bottom of the lower die seat (2) via a bearing seat.

6. The easy-to-release junction box cover injection mold according to claim 1, characterized in that: A groove is provided inside the fixed base plate (3), and the drive motor (406) is fixedly installed inside the groove by means of bolts.

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