Thread demoulding mechanism with water-cooling temperature adjusting function

Abstract

The utility model discloses a thread demoulding mechanism with a water-cooling temperature adjusting function, which is characterized in that the mechanism comprises a rack, the top end of the rack is fixedly connected with a fixed template, the rack is meshed with a first tooth-shaped part on a compound gear, the compound gear is rotatably supported on a sliding block, the sliding block is connected with a movable template in a sliding manner, and the movable template is fixedly connected with the compound gear. A threaded insert is further rotationally supported on the sliding block, in the mold closing state, a thread forming part located at the end of the threaded insert is located in the mold cavity and forms a part of the mold cavity, external threads are arranged on the outer wall of the threaded insert, a second tooth-shaped part on the compound gear is meshed with the external threads on the threaded insert, and a second tooth-shaped part on the compound gear is meshed with the second tooth-shaped part on the compound gear. A first supporting block is arranged on the sliding block, a threaded sleeve is arranged on the first supporting block, the threaded sleeve is in threaded connection with a threaded driving part arranged at the tail end of the threaded insert, and the thread pitch of the threaded driving part is the same as that of the threaded forming part.

Description

Technical Field

[0001] The utility model relates to the field of injection molding, in particular to a thread stripping mechanism with a water cooling and temperature regulating function. Background Art

[0002] When using injection molds to produce plastic products, some plastic products have inner holes with threads. This structure is essentially an undercut structure. Traditional core pulling actions and core pulling mechanisms cannot achieve the demoulding action (i.e., thread removal action) of such threaded inner holes. Therefore, it is necessary to design a demoulding mechanism specifically for thread removal.

[0003] However, the rubber used in some products has a high melting point, which means that the temperature of the mold needs to be between 95-105°C. Under such relatively high temperature working conditions, heat collection will occur in the rotating structure of the thread stripping mechanism, resulting in defects in the threads of the final product, affecting the quality of the product and also increasing the defective rate of the product.

[0004] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0005] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a thread removing mechanism with water cooling and temperature regulating function which has simple structure, ingenious design, reasonable layout, can reduce the temperature of the thread structure on the product and ensure the quality of the product.

[0006] The technical solution of the utility model is: a thread stripping mechanism with water cooling and temperature regulating function, characterized in that: the mechanism includes a rack 1 with a top end fixedly connected to a fixed template, the rack 1 meshes with a first toothed portion 3 on a composite gear 2, the composite gear 2 is rotatably supported on a slider 4, the slider 4 is slidably connected to a movable template, a threaded insert 5 is also rotatably supported on the slider 4, in a mold closing state, a threaded forming portion 6 located at the end of the threaded insert 5 is located in the mold cavity and forms a part of the mold cavity, a third toothed portion is provided on the outer wall of the threaded insert 5, a second toothed portion 7 on the composite gear 2 meshes with the third toothed portion on the threaded insert 5,

[0007] The slider 4 is provided with a first support block 8, and the first support block 8 is provided with a thread sleeve 9, and the thread sleeve 9 is threadedly connected with a thread drive part 10 provided at the tail end of the thread insert 5, and the thread drive part 10 has the same pitch as the thread forming part 6.

[0008] The slider 4 is also provided with a second support block 11, which is fixedly connected to one end of a central support tube 12, and the central support tube 12 is movably inserted into the inner cavity of the threaded sleeve 9. A pin-type cooling tube 13 is also provided in the central support tube 12, and the tail end of the pin-type cooling tube 13 is connected to a cooling water circulation system through a pipeline.

[0009] The movable platen is also provided with a driving cylinder 14 , and a working end of the driving cylinder 14 is connected to the slider 4 .

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] This type of structural form of the thread-removing mechanism with water-cooling and temperature-regulating function has a simple structure, ingenious design, and reasonable layout. It is designed to address the actual situation that the traditional thread-removing mechanism is easily affected by the heat collection problem and affects the product quality. First, it uses a set of gear rack mechanisms to drive the threaded inserts. This set of driving mechanisms will automatically run with the mold opening action and drive the threaded inserts to rotate. No additional driving mechanism is required, which can save space and cost. At the same time, it sets a needle cooling tube inside the threaded insert. The needle cooling tube is connected to the cooling water circulation system through a pipeline. The cold water flowing in the needle cooling tube can cool the threaded part to ensure that it is always within the normal temperature range, thereby ensuring the quality of the product and the yield of the product. At the same time, the manufacturing process of this thread-removing mechanism is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the rack and compound gear part in the embodiment of the utility model.

[0013] Figure 2 It is a cross-sectional view of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figure 1 , Figure 2 As shown: a thread-removing mechanism with water-cooling and temperature-regulating function, which comprises a rack 1 whose top end is fixedly connected to a fixed template, the rack 1 meshes with a first tooth-shaped portion 3 on a composite gear 2, the composite gear 2 is rotatably supported on a slider 4, the slider 4 is slidably connected to a movable template, a threaded insert 5 is also rotatably supported on the slider 4, in a mold-closing state, a threaded forming portion 6 located at the end of the threaded insert 5 is located in the mold cavity and forms a part of the mold cavity, a third tooth-shaped portion is arranged on the outer wall of the threaded insert 5, a second tooth-shaped portion 7 on the composite gear 2 meshes with the third tooth-shaped portion on the threaded insert 5,

[0015] The slider 4 is provided with a first support block 8, and the first support block 8 is provided with a thread sleeve 9, and the thread sleeve 9 is threadedly connected with a thread drive part 10 provided at the tail end of the thread insert 5, and the thread drive part 10 has the same pitch as the thread forming part 6.

[0016] The slider 4 is also provided with a second support block 11, which is fixedly connected to one end of a central support tube 12, and the central support tube 12 is movably inserted into the inner cavity of the threaded sleeve 9. A pin-type cooling tube 13 is also provided in the central support tube 12, and the tail end of the pin-type cooling tube 13 is connected to a cooling water circulation system through a pipeline.

[0017] The movable platen is also provided with a driving cylinder 14 , and a working end of the driving cylinder 14 is connected to the slider 4 .

[0018] The working process of the thread stripping mechanism with water cooling and temperature regulating function of the embodiment of the utility model is as follows: in the mold closing state, the slider 4 is located near the mold cavity, and the thread forming part 6 at the end of the thread insert 5 is located in the mold cavity and occupies a position to form a part of the mold cavity; the molding machine injects the molten material into the mold cavity, and the material is cooled to form a product 15, and a threaded hole is formed at the position corresponding to the thread forming part 6;

[0019] When the mold is opened, the movable mold part moves away from the fixed mold part, and the rack 1 moves linearly relative to the compound gear 2, thereby driving the compound gear 2 to rotate. When the compound gear 2 rotates, it drives the threaded insert 5 meshing with it to rotate;

[0020] Since the threaded drive part 10 provided at the rear end of the threaded insert 5 is threadedly connected to the threaded sleeve 9, and the threaded sleeve 9 is immovable relative to the slider 4, when the threaded insert 5 rotates, under the action of the threaded sleeve 9, the threaded insert 5 will withdraw from the threaded hole on the product 15 while rotating, thereby realizing the action of thread removal;

[0021] Since the thread drive portion 10 and the thread forming portion 6 have the same pitch, when the thread insert 5 rotates, the thread forming portion 6 at the front end thereof can be smoothly removed from the threaded hole on the product 15;

[0022] In the above process, the cooling water circulation system drives the cooling water to circulate in the needle cooling tube 13. Since the needle cooling tube 13 is sleeved in the central support tube 12, and the central support tube 12 is movably connected in the inner cavity of the threaded sleeve 9, this structure can cool the threaded sleeve 9 (including the thread forming part 6) to prevent heat collection at the thread forming part 6, thereby ensuring the quality of the product.

Claims

1. A thread-removing mechanism with water-cooling and temperature-regulating function, characterized in that: The mechanism comprises a rack (1) whose top end is fixedly connected to a fixed mold plate, the rack (1) meshing with a first toothed portion (3) on a composite gear (2), the composite gear (2) being rotatably supported on a slider (4), the slider (4) being slidably connected to a movable mold plate, the slider (4) also rotatably supporting a threaded insert (5), in a mold closing state, a threaded forming portion (6) located at an end of the threaded insert (5) being located in the mold cavity and forming a part of the mold cavity, a third toothed portion being arranged on an outer wall of the threaded insert (5), the second toothed portion (7) on the composite gear (2) meshing with the third toothed portion on the threaded insert (5), The slider (4) is provided with a first support block (8), the first support block (8) is provided with a threaded sleeve (9), the threaded sleeve (9) is threadedly connected to a threaded drive portion (10) provided at the rear end of the threaded insert (5), and the threaded drive portion (10) has the same thread pitch as the thread forming portion (6). The slider (4) is also provided with a second support block (11), the second support block (11) is fixedly connected to one end of a central support tube (12), the central support tube (12) is movably inserted into the inner cavity of the threaded sleeve (9), and a needle-type cooling tube (13) is also provided in the central support tube (12), the tail end of the needle-type cooling tube (13) is connected to a cooling water circulation system via a pipeline. A driving cylinder (14) is also provided on the movable platen, and a working end of the driving cylinder (14) is connected to the slider (4).

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