Plastic mold device

Abstract

The utility model relates to a plastic mould device, which belongs to the technical field of injection moulds and comprises a threaded shaft, a tooth socket, a transmission device and a driving device, the tooth socket is spirally sleeved at the lower end of the threaded shaft, and the upper end of the threaded shaft is screwed in an internal thread of an injection product. By the adoption of the structure, the threaded shaft can be driven to rotate under the condition that a mold is not opened, the positions of the injection molding product and the tooth sleeve are fixed, the threaded shaft is made to move downwards, and therefore the purpose that threaded connection between the upper end of the threaded shaft and the injection molding product is disengaged is achieved; the device is not influenced by the size and shape complexity of injection molding products, can efficiently release threads under the demolding or non-demolding condition, and is suitable for releasing various internal thread injection molding products.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and particularly relates to a plastic mold device. Background Art

[0002] Injection molding is a method for producing industrial products. For products with internal threads, the current methods are: 1. Use an inward-retracting structure. The inward-retracting structure is generally suitable for products with large internal threads, and there is enough space to ensure the strength of the inward-retracting inserts and the adequacy of the movement space. The advantage of this solution is that it is easy to process, but the disadvantage is that it generally requires a push plate to eject the whole thing because the inward-retracting structure occupies a relatively large space under the internal thread. Generally, the ejector cannot be placed, which may increase the mold cost. If there is a slider structure on the outside of the product, it is not conducive to the production of products with multiple mold cavities. 2. Use a motor to drive the tooth shaft to rotate in place, and the push plate pushes the product forward. A spring is added behind the push plate to give the product the force to move forward. The product moves with the movement of the thread. The advantage of this solution is that the product needs to move at the same time as the extrusion of the push plate and the shedding of the thread. It is generally suitable for smaller circular regular products. The above two methods are not ideal in efficiency and flexibility for some special-shaped products that need to remove internal threads.

[0003] Therefore, a plastic mold device for spiral core pulling with high efficiency and flexibility is in urgent need of appearance. Utility Model Content

[0004] The utility model provides a plastic mold device, which is used to solve the technical problems of low efficiency and low flexibility in disengaging internal threads of injection molded products in the prior art.

[0005] The utility model is realized through the following technical scheme: a plastic mold device, comprising a threaded shaft, a toothed sleeve, a transmission device and a driving device, wherein the toothed sleeve is spirally sleeved on the lower end of the threaded shaft, the upper end of the threaded shaft is screwed into the internal thread of the injection molded product, and the driving device drives the threaded shaft to rotate through the transmission device to withdraw from the internal thread of the injection molded product.

[0006] In order to better realize the utility model, further optimization is made in the above structure. The transmission device includes a gear shaft, a first gear and a second gear. A spur gear is provided at the lower part of the gear shaft. The first gear is fixed on the upper part of the gear shaft, and the second gear is fixed on the middle part of the threaded shaft. The first gear is meshed with the second gear for transmission.

[0007] In order to better realize the utility model, further optimization is made in the above structure. Two annular grooves are spaced apart on the upper part of the gear shaft. A retaining spring is clamped in each of the annular grooves. The first gear is located between the two retaining springs.

[0008] In order to better realize the utility model, further optimization is made in the above structure. A flat key is provided on the upper part of the gear shaft. The flat key is located between two retaining springs. The inner wall of the first gear is provided with a keyway matching the flat key.

[0009] In order to better realize the utility model, further optimization is made in the above structure, and the bottom and the top of the gear shaft are provided with bearings for connecting to the workbench.

[0010] In order to better implement the present invention, further optimization is made in the above structure, where the second gear and the threaded shaft are an integrated structural component.

[0011] In order to better realize the utility model, further optimization is made in the above structure, the driving device includes a linear rack and a rack driver driving the linear rack to move linearly, and the linear rack is meshed with the spur gear of the gear shaft for transmission.

[0012] In order to better realize the utility model, the above structure is further optimized to further include a lubricating sleeve, which is sleeved on the threaded shaft and located above the second gear.

[0013] In order to better implement the present invention, further optimization is made in the above structure, and the thickness of the first gear is greater than the thickness of the second gear.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The plastic mold device provided by the utility model comprises a threaded shaft, a toothed sleeve, a transmission device and a driving device. The toothed sleeve is spirally sleeved on the lower end of the threaded shaft, and the upper end of the threaded shaft is screwed into the internal thread of the injection molded product. The driving device drives the threaded shaft to rotate through the transmission device to withdraw from the internal thread of the injection molded product. With this structure, the threaded shaft can be driven to rotate without opening the mold, and the positions of the injection molded product and the toothed sleeve are fixed, so that the threaded shaft moves downward, thereby achieving the purpose of disengaging the threaded connection between the upper end of the threaded shaft and the injection molded product. It is not affected by the size and complexity of the shape of the injection molded product, and the thread can be efficiently disengaged under demolding or non-demolding conditions. It is suitable for the shedding of various types of internally threaded injection molded products, making the utility model more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 or the description of the prior art 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.

[0017] Figure 1 It is a three-dimensional diagram of the plastic mold device in the utility model;

[0018] Figure 2 It is an exploded view of the plastic mold device in the utility model;

[0019] In the figure:

[0020] 1-threaded shaft; 2-threaded sleeve; 3-gear shaft; 4-first gear; 5-second gear; 6-spur gear; 7-circlip; 8-flat key; 9-bearing; 10-linear rack; 11-lubricating sleeve. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0022] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] Embodiment 1:

[0025] In this embodiment, a plastic mold device, such as Figure 1As shown, it includes a threaded shaft 1, a toothed sleeve 2, a transmission device and a driving device. Specifically, the toothed sleeve 2 is spirally sleeved on the lower end of the threaded shaft 1, the toothed sleeve 2 has an internal threaded hole and passes through from top to bottom, the upper end of the threaded shaft 1 is screwed into the internal thread of the injection molded product, and during injection molding, the threaded shaft 1 is used to form the internal threaded hole of the injection molded product, the injection molded product is fixed by a mold, the toothed sleeve 2 is fixed on an operating table, and the driving device drives the threaded shaft 1 to rotate through the transmission device to withdraw from the internal thread of the injection molded product.

[0026] By adopting this structure, the threaded shaft 1 can be driven to rotate without opening the mold, and the positions of the injection molded product and the brace 2 are fixed, so that the threaded shaft 1 can be moved downward, thereby achieving the purpose of disengaging the threaded connection between the upper end of the threaded shaft 1 and the injection molded product. It is not affected by the size and complexity of the shape of the injection molded product, and the thread can be efficiently disengaged under demolding or non-demolding conditions. It is suitable for the disengagement of various types of internal thread injection molded products, making the practicality of the utility model stronger.

[0027] According to a preferred embodiment, Figure 1 and Figure 2 As shown, the transmission device includes a gear shaft 3, a first gear 4 and a second gear 5. A spur gear 6 is provided at the lower portion of the gear shaft 3. The spur gear 6 is used for transmission connection to the power output end of the driving device. The first gear 4 is sleeved on the upper portion of the gear shaft 3 through a keyway structure, so that the first gear 4 and the gear shaft 3 rotate synchronously. The second gear 5 is sleeved on the middle portion of the threaded shaft 1. The second gear 5 and the threaded shaft 1 are an integrated structure. The first gear 4 is meshed with the second gear 5 for transmission, thereby driving the threaded shaft 1 to rotate. Since the braces 2 and the injection molded product are both fixed in position, the threaded shaft 1 gradually moves downward during rotation, so that the upper end of the threaded shaft 1 gradually disengages from the internal thread of the injection molded product.

[0028] In this embodiment, Figure 2 As shown, two annular grooves are provided at intervals on the upper part of the above-mentioned gear shaft 3, and retaining springs 7 are clamped in the above-mentioned annular grooves. The above-mentioned first gear 4 is located between the two above-mentioned retaining springs 7, and the above-mentioned gear shaft 3 is clamped from the upper and lower ends by the above-mentioned retaining springs 7 to prevent the above-mentioned gear shaft 3 from moving up and down. Furthermore, a flat key 8 is provided on the upper part of the above-mentioned gear shaft 3, and the above-mentioned flat key 8 is located between the two above-mentioned retaining springs 7, and the inner wall of the above-mentioned first gear 4 is provided with a keyway matching the above-mentioned flat key 8, and the above-mentioned flat key 8 cooperates with the keyway to drive the above-mentioned first gear 4 to rotate.

[0029] In this embodiment, the bottom and top of the gear shaft 3 are both provided with bearings 9 for connecting to a workbench, so that the position of the gear shaft 3 is fixed and the circumferential rotation is performed without jamming.

[0030] As a specific implementation of this embodiment, Figure 1 As shown, the driving device includes a linear rack 10 and a rack driver for driving the linear rack 10 to move linearly. The linear rack 10 is meshed with the spur gear 6 of the gear shaft 3 for transmission. The linear motion of the linear rack 10 transmits power to the threaded shaft 1 through the gear shaft 3, so that the threaded shaft 1 rotates and disengages from the internal thread of the injection molded product. In this way, a plurality of transmission devices can be arranged along the length direction of the linear rack 10, and each transmission device corresponds to a group of threaded shafts 1 and injection molded products, respectively, so that the thread disengagement operation of multiple injection molded products can be completed simultaneously, thereby improving production efficiency.

[0031] In this embodiment, Figure 1 As shown, it also includes a lubricating sleeve 11, which is sleeved on the threaded shaft 1 and located above the second gear 5. The lubricating sleeve 11 is fixed to the workbench. The lubricating sleeve 11 is used to align the threaded shaft 1 to prevent the threaded shaft 1 from deflecting or tilting, which may cause the second gear 5 to disengage from the first gear 4. At the same time, the lubricating sleeve 11 also plays a role in reducing friction and lubricating, so that the threaded shaft 1 can move downward without getting stuck.

[0032] In this embodiment, the thickness of the first gear 4 is greater than that of the second gear 5, ensuring that the second gear 5 always remains in meshing with the first gear 4 during the movement of the threaded shaft 1, thereby preventing the first gear 4 and the second gear 5 from disengaging.

[0033] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A plastic mold device, characterized in that: It comprises a threaded shaft (1), a toothed sleeve (2), a transmission device and a driving device, wherein the toothed sleeve (2) is spirally sleeved on the lower end of the threaded shaft (1), the upper end of the threaded shaft (1) is screwed into the internal thread of the injection-molded product, and the driving device drives the threaded shaft (1) to rotate through the transmission device so as to withdraw from the internal thread of the injection-molded product; The transmission device comprises a gear shaft (3), a first gear (4) and a second gear (5); a spur gear (6) is provided at the lower part of the gear shaft (3); the first gear (4) is sleeved on the upper part of the gear shaft (3); the second gear (5) is sleeved on the middle part of the threaded shaft (1); the first gear (4) and the second gear (5) are meshed for transmission; Two annular grooves are arranged at intervals on the upper part of the gear shaft (3), and a retaining spring (7) is clamped in each of the annular grooves, and the first gear (4) is located between the two retaining springs (7); A flat key (8) is provided on the upper part of the gear shaft (3), and the flat key (8) is located between two retaining rings (7). A keyway matching the flat key (8) is provided on the inner wall of the first gear (4).

2. A plastic mold device according to claim 1, characterized in that: The bottom and top of the gear shaft (3) are both provided with bearings (9) for connecting to a workbench.

3. A plastic mold device according to claim 1, characterized in that: The second gear (5) and the threaded shaft (1) are an integral structural component.

4. A plastic mold device according to claim 1, characterized in that: The driving device comprises a linear rack (10) and a rack driver for driving the linear rack (10) to move linearly, and the linear rack (10) is meshed with a spur gear (6) of a gear shaft (3) for transmission.

5. A plastic mold device according to claim 1, characterized in that: It also comprises a lubricating sleeve (11), which is sleeved on the threaded shaft (1) and is located above the second gear (5).

6. A plastic mold device according to claim 1, characterized in that: The thickness of the first gear (4) is greater than the thickness of the second gear (5).

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