Office table accessory mold

Abstract

The utility model discloses an office table accessory mold, which comprises an upper mold and a lower mold, a cavity formed after the upper mold and the lower mold are closed forms a shell of a product body, the upper mold is provided with a through hole communicated with the cavity, a screw rod penetrates into the through hole, one section with threads of the screw rod penetrates into the cavity, and the other section with threads of the screw rod penetrates into the lower mold. A through hole is formed in the upper die, one end of the threaded rod is connected to the upper die, the other end of the threaded rod is connected to a sleeve, the outer ring of the sleeve is connected to the through hole through threads, a gear is arranged on the outer ring of the sleeve, a hydraulic cylinder is arranged at the end of the upper die, a rack is fixed to a piston rod of the hydraulic cylinder, and the rack is matched with the gear.

Description

Technical Field

[0001] The utility model relates to a mould, in particular to a desk accessory mould. Background Art

[0002] Figure 1 An accessory for an office desk is shown in the figure, which includes a main body 1, a screw hole 11 is provided in the middle of the main body 1, two columns 12 are provided on the end surface of the main body 1, and through holes are provided in the columns 12.

[0003] This kind of product cannot be demoulded by conventional methods due to the presence of screw holes. The current method for screw hole molding is to directly fix a screw on the rotating shaft of the motor, the motor is fixed on one end of the mold, and the screw is inserted into the cavity. When in use, the cavity is filled with liquid, and then after cooling to solidify, the product is formed. The motor rotates to rotate the screw out of the product.

[0004] This method has the following problems: after the first liquid material cools into a solid, it sticks to the surface of the screw, and a lot of force is needed to turn the screw. However, if the motor needs a large torque, it needs to be matched with a reduction mechanism, which greatly increases the cost.

[0005] Secondly, a motor is installed on the mold. Since the mold is always at a high temperature during use, the environment in which the motor is used is harsh, heat dissipation is particularly difficult, and even demagnetization may occur. Therefore, it is necessary to make improvements. Summary of the invention

[0006] The utility model aims to provide a desk accessory mold, which does not use a motor to assist demoulding, greatly reduces the cost, and does not have the problem of heat dissipation.

[0007] To achieve the above purpose, the utility model provides the following technical solutions: a mold for office desk accessories, including an upper mold and a lower mold, the cavity formed by the upper mold and the lower mold after the mold is combined constitutes the outer shell of the product body, the upper mold is provided with a through hole connected to the cavity, a screw is inserted into the through hole, a threaded section of the screw is inserted into the cavity, the other end of the screw is connected to a sleeve, the outer ring of the sleeve is connected to the through hole by thread, the outer ring of the sleeve is provided with a gear, the end of the upper mold is provided with a hydraulic cylinder, a rack is fixed on the piston rod of the hydraulic cylinder, and the rack cooperates with the gear. When in use, the injection molding machine injects liquid into the cavity, after the liquid is cooled, the product is formed, and then the hydraulic cylinder is started, the hydraulic cylinder drives the rack to move, the rack drives the sleeve to rotate through the gear, the sleeve will move upward because it is threaded in the through hole, and in the process of upward movement, the screw is driven to rotate out of the product, so that demoulding is completed. This structure does not use motors to assist in demoulding, which greatly reduces costs and does not cause heat dissipation problems.

[0008] In the above technical solution, preferably, the upper mold includes a first mold core and a first mold frame, the first mold frame is arranged outside the first mold core, the first mold core forms the upper half of the cavity, and the through hole is arranged in the first mold frame.

[0009] In the above technical solution, preferably, the first mold frame includes an assembly part, the assembly part is fixed in the first mold frame, and the through hole is arranged in the assembly part.

[0010] In the above technical solution, preferably, a first clamping block is arranged above the first mold frame, an upper mold plate is arranged above the first clamping block, a bearing is fixed on the upper mold plate, and the top of the sleeve is rotatably connected to the bearing.

[0011] In the above technical solution, preferably, the lower mold includes a second mold core and a second mold frame, the second mold frame is arranged outside the second mold core, and the second mold core forms the lower half of the cavity.

[0012] In the above technical solution, preferably, a guide block is fixed on the end surface of the hydraulic cylinder, a slide groove is provided in the guide block, and the rack is slidably connected in the slide groove.

[0013] In the above technical solution, preferably, a protrusion is arranged above the slide groove, and two clamping bolts are arranged on the protrusion. The clamping bolts pass through the protrusion and then press against the rack.

[0014] The utility model has at least the following beneficial effects: when in use, the injection molding machine injects liquid into the mold cavity, waits for the liquid to cool, forms a product, and then starts the hydraulic cylinder, which drives the rack to move, and the rack drives the sleeve to rotate through the gear. The sleeve moves upward because it is threaded in the through hole, and in the process of moving upward, it drives the screw to rotate out of the product, thus completing demoulding. This structure does not use motor-assisted demoulding, greatly reduces costs, and does not have heat dissipation problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of office accessories.

[0016] Figure 2 It is a three-dimensional schematic diagram of the utility model.

[0017] Figure 3 It is a schematic diagram (partial) of the top of the utility model.

[0018] Figure 4 for Figure 3 Section view along AA.

[0019] Figure 5for Figure 4 This is a schematic diagram of the utility model after removing the upper template.

[0020] Figure 6 for Figure 5 A partial enlarged schematic diagram of .

[0021] Figure 7 It is a schematic diagram of the hydraulic cylinder. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 2-7 A mold for office desk accessories includes an upper mold 2 and a lower mold 3. The cavity 100 formed by the upper mold 2 and the lower mold 3 after the mold is closed constitutes the outer shell of the product body. The upper mold 2 is provided with a through hole 2a connected with the cavity 100. A screw 4 is inserted into the through hole 2a. The screw 4 is inserted into the cavity 100 with a threaded section. The other end of the screw 4 is connected to a sleeve 5. The outer ring of the sleeve 5 is connected to the through hole 2a by a thread. The outer ring of the sleeve 5 is provided with a gear 51. A hydraulic cylinder 6 is provided at the end of the upper mold 2. A rack 61 is fixed on the piston rod of the hydraulic cylinder 6, and the rack 61 cooperates with the gear 51.

[0024] The upper mold 2 includes a first mold core 21 and a first mold frame 22. The first mold frame 22 is arranged outside the first mold core 21. The first mold core 21 forms the upper half of the cavity 100. The first mold frame 22 includes an assembly part 221. The assembly part 221 is fixed in the first mold frame 22. The through hole 2a is arranged in the assembly part 221.

[0025] A first pressing block 7 is disposed above the first mold frame 2 , and an upper mold plate 8 is disposed above the first pressing block 7 . A bearing 81 is fixed to the upper mold plate 8 , and the top of the sleeve 5 is rotatably connected to the bearing 81 .

[0026] The lower mold 3 includes a second mold core 31 and a second mold frame 32 . The second mold frame 32 is disposed outside the second mold core 31 . The second mold core 31 forms the lower half of the mold cavity 100 .

[0027] A guide block 62 is fixed on the end surface of the hydraulic cylinder 6, and a slide groove 621 is provided in the guide block 62, and the rack 61 is slidably connected in the slide groove 621. A convex block 622 is provided above the slide groove 621, and two clamping bolts 623 are provided on the convex block 622, and the clamping bolts are pressed against the rack after passing through the convex block.

[0028] When in use, the injection molding machine injects liquid into the cavity, waits for the liquid to cool, forms a product, and then starts the hydraulic cylinder, which drives the rack to move, and the rack drives the sleeve to rotate through the gear. The sleeve moves upward because it is threaded in the through hole. During the upward movement, it drives the screw to rotate out of the product, thus completing the demoulding. This structure does not use motor-assisted demoulding, greatly reduces costs, and does not have heat dissipation problems.

[0029] 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. A mold for office desk accessories, comprising an upper mold and a lower mold, wherein the mold cavity formed by the upper mold and the lower mold after being molded together constitutes the outer shell of the product body, the upper mold is provided with a through hole communicating with the mold cavity, a screw rod is inserted into the through hole, a threaded section of the screw rod is inserted into the mold cavity, the other end of the screw rod is connected to a sleeve, the outer ring of the sleeve is connected to the through hole by a thread, and the characteristics are: The outer ring of the sleeve is provided with a gear, the end of the upper die is provided with a hydraulic cylinder, a rack is fixed on the piston rod of the hydraulic cylinder, and the rack matches the gear.

2. The office desk accessory mold according to claim 1, characterized in that: The upper mold includes a first mold core and a first mold frame, the first mold frame is arranged outside the first mold core, the first mold core forms the upper half of the cavity, and the through hole is arranged in the first mold frame.

3. The office desk accessory mold according to claim 2, characterized in that: The first mold frame includes an assembly part, the assembly part is fixed in the first mold frame, and the through hole is arranged in the assembly part.

4. The office desk accessory mold according to claim 3, characterized in that: A first pressing block is arranged above the first mold frame, an upper mold plate is arranged above the first pressing block, a bearing is fixed on the upper mold plate, and the top of the sleeve is rotatably connected to the bearing.

5. The office desk accessory mold according to claim 1, characterized in that: The lower mold includes a second mold core and a second mold frame, the second mold frame is arranged outside the second mold core, and the second mold core forms the lower half of the mold cavity.

6. The office desk accessory mold according to claim 1, characterized in that: A guide block is fixed on the end surface of the hydraulic cylinder. A slide groove is provided in the guide block, and the rack is slidably connected in the slide groove.

7. The office desk accessory mold according to claim 6, characterized in that: A convex block is arranged above the slide groove, and two clamping bolts are arranged on the convex block. The clamping bolts pass through the convex block and then press against the rack.

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