Adjustable double elbow injection mold

Abstract

The present application belongs to the technical field of duplex elbow production and application, and particularly relates to an adjustable duplex elbow injection mold. The mold comprises a fixed mold and a movable mold arranged in cooperation, and the opposite surfaces of the fixed mold and the movable mold are provided with mold cores. The opposite surfaces of the fixed mold and the movable mold are provided with mold core cavities, the mold cores are arranged in the mold core cavities, the mold core comprises a mold core seat arranged in the middle of the mold core cavity, the mold core seat divides the mold core cavity into two cavities arranged on the left and right sides, the mold core seat is provided with a connecting body groove, the two sides of the mold core seat are provided with elbow seats, the elbow seats are provided with elbow grooves, and the elbow seats are slidingly arranged in the mold core cavities. The structure of the existing mold is adjusted, the traditional fixed structure is changed into an adjustable structure, the product specifications obtained by using the injection mold are diversified, and the problems caused by the existing fixed mold are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of double elbow production and application, and particularly relates to an adjustable double elbow injection mold. Background Technology

[0002] In piping systems, elbows are pipe fittings used to change the direction of pipelines. Based on angle, the three most common types are 45°, 90°, and 180°. Additionally, special angle elbows such as 60° are available depending on project requirements. Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals, and plastics. Elbows can be connected to pipes in various ways, including direct welding (the most common method), flange connection, hot-melt connection, electrofusion connection, threaded connection, and socket connection. According to manufacturing processes, elbows can be classified as welded elbows, stamped elbows, push-formed elbows, cast elbows, and butt-welded elbows. Double elbows are frequently used in plumbing installations.

[0003] Existing double elbows mainly consist of a long, strip-shaped connecting body and elbows fixed at both ends along the length of the connecting body. Currently, most plastic double elbows on the market are injection molded as a single unit. Common specifications for double elbows on the market include 100mm, 150mm, and other sizes (distance between the centers of the two elbows). However, the molds required for injection molding are generally of fixed specifications. Therefore, producing double elbows of different specifications requires different molds, which are very expensive. Purchasing new molds for small batches of special-specification double elbows would result in no profit margin, while increasing prices would reduce market competitiveness. Furthermore, mold making takes time, leading to high workload and low profit in this type of work. Therefore, it is crucial to develop adjustable molds to accommodate more specifications of double elbows, thereby increasing company profits and reducing workload. Summary of the Invention

[0004] This invention addresses the technical problems of existing injection molds required for the production of double elbows made of plastic materials, and proposes an adjustable double elbow injection mold that is reasonably designed, simple in structure, easy to process, and capable of adjusting the length of the finished double elbow.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides an adjustable double elbow injection mold, including a fixed mold and a moving mold arranged in a mutually cooperating manner. A mold core is provided on the opposite surfaces of the fixed mold and the moving mold, and a mold core cavity is provided on each opposite surface of the fixed mold and the moving mold. The mold core is disposed within the mold core cavity. The mold core includes a mold core seat disposed in the middle of the mold core cavity, and the mold core seat divides the mold core cavity into two chambers arranged on the left and right. A connecting groove is provided on the mold core seat. Elbow seats are provided on both sides of the mold core seat, and elbow seats are provided on the elbow seats. Elbow seats are slidably disposed within the mold core cavity. The elbow seats and the mold core seats... An auxiliary connecting body seat is also provided between them. The auxiliary connecting body seat is provided with an auxiliary connecting body groove. The connecting body groove, the auxiliary connecting body groove and the elbow groove together form the molding groove required for the injection molding of the double elbow. Several auxiliary connecting body seats are provided between the elbow seat and the mold core seat. The auxiliary connecting body seats are inserted into the mold core cavity. An elbow shaping mold core seat is also provided in the mold core cavity of the moving mold. An elbow shaping mold core is provided on the elbow shaping mold core seat. The elbow shaping mold core seat is located on one side of the elbow seat. The elbow shaping mold core seat is slidably located in the mold core cavity. The elbow shaping mold core is inserted and removed from the elbow shaping mold core seat.

[0006] Preferably, both the fixed mold and the moving mold are equipped with telescopic cylinders, which extend through the fixed mold / moving mold into the mold core cavity, and the power end of the telescopic cylinder is connected to the elbow seat.

[0007] Preferably, the auxiliary connector seat includes a cuboid body and insertion protrusions on both sides of the body. The mold core cavity is provided with an insertion groove that mates with the connecting protrusions. The top of the body near the mold core seat has a connecting protrusion. The mold core seat has a connecting inclined surface that mates with the connecting protrusion. The top of the body away from the mold core seat has an auxiliary inclined surface. The elbow seat has an auxiliary protrusion that mates with the auxiliary inclined surface on the side near the body.

[0008] Preferably, the bottom of the mold core cavity is provided with a placement groove for placing the auxiliary connector seat.

[0009] Preferably, the moving mold is also provided with an adjusting cylinder, which extends through the moving mold into the mold core cavity, and the power end of the adjusting cylinder is connected to the elbow shaping mold core seat.

[0010] Preferably, both the connecting inclined surface and the auxiliary inclined surface are provided with liquid storage tanks.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0012] 1. This invention provides an adjustable double elbow injection mold. By adjusting the structure of the existing mold, the traditional fixed structure is changed to an adjustable structure, thereby making the product specifications obtained by using this injection mold more diverse and solving the problems caused by the existing fixed mold. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the adjustable double elbow injection mold provided in Example 1;

[0015] Figure 2 This is a structural schematic diagram of another angle of the adjustable double elbow injection mold provided in Example 1;

[0016] Figure 3 This is a schematic diagram of the structure between the moving mold and the mold core provided in Example 1;

[0017] Figure 4 This is a schematic diagram of the structure of the moving mold provided in Example 1;

[0018] Figure 5 This is a schematic diagram of the auxiliary connector seat provided in Example 1;

[0019] Figure 6 This is a structural schematic diagram of the auxiliary connector seat provided in Embodiment 1 from another angle;

[0020] Figure 7 A schematic diagram of the elbow seat provided in Example 1;

[0021] In the above figures, 1. Fixed mold; 2. Moving mold; 21. Mold core cavity; 22. Insertion groove; 23. Placement groove; 3. Mold core; 31. Mold core seat; 311. Connecting body groove; 312. Connecting inclined surface; 32. Elbow seat; 321. Elbow groove; 322. Auxiliary protrusion; 33. Auxiliary connecting body seat; 331. Auxiliary connecting body groove; 332. Insertion protrusion; 333. Connecting protrusion; 334. Auxiliary inclined surface; 335. Liquid storage tank; 34. Elbow shaping mold core seat; 341. Elbow shaping mold core; 4. Telescopic cylinder; 5. Adjusting cylinder. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Example 1, as Figures 1 to 7 As shown, this embodiment aims to provide an injection mold capable of producing double elbows of different specifications, thereby solving the problem that existing injection molds can only produce a single specification. This addresses the technical issues of high workload and high mold cost due to short production cycles when producing small batches of double elbows of specific specifications. To this end, the adjustable double elbow injection mold provided in this embodiment is similar to traditional injection molds, including a fixed mold 1 and a moving mold 2 that cooperate with each other. A mold core 3 is provided on the opposite surface of the fixed mold 1 and the moving mold 2. Unlike traditional mold cores where the mold core 3 is fixed on the opposite surface of the fixed mold 1 and the moving mold 2, in this embodiment, a mold core cavity 21 is provided on the opposite surface of both the fixed mold 1 and the moving mold 2. The mold core 3 is disposed in the mold core cavity 21, the purpose of which is to allow the mold core 3 to move within the mold core cavity 21 to achieve length adjustment.

[0025] To achieve the above objectives, in this embodiment, the mold core 3 includes a mold core seat 31 disposed in the middle of the mold core cavity 21. The mold core seat 31 is rectangular in shape and is integrally machined with the fixed mold 1 and the moving mold 2. The mold core seat 31 divides the mold core cavity 21 into two chambers arranged on the left and right sides, thus placing the mold core seat 31 in the middle part of the double elbow. A connecting body groove 311 is provided on the mold core seat 31, and the shape of the connecting body groove 311 is the middle part of the connecting body of the double elbow.

[0026] To achieve injection molding of the bends at both ends of the double elbow, in this embodiment, elbow seats 32 are provided on both sides of the mold core seat 31, and elbow grooves 321 are provided on the elbow seats 32. The elbow grooves 321 correspond to the bends of the double elbow. Since the length of the entire double elbow needs to be adjusted, in this embodiment, the elbow seats 32 are slidably disposed in the mold core cavity 21. Specifically, telescopic cylinders 4 are provided on the fixed mold 1 and the moving mold 2. The telescopic cylinders 4 penetrate the fixed mold 1 / moving mold 2 and extend into the mold core cavity 21. The power end of the telescopic cylinders 4 is connected to the elbow seats 32. A sliding groove is provided on the side wall of the mold core cavity 21, and a protrusion that cooperates with the sliding groove is provided on the side wall of the elbow seats 32. In this way, the elbow seats 32 can move left and right relative to the mold core seat 31, thereby adjusting the distance between the two.

[0027] Since the distance between the elbow seat 32 and the mold core seat 31 has been adjusted, the gap between them needs to be filled. Therefore, an auxiliary connecting body seat 33 is provided between the elbow seat 32 and the mold core seat 31. The auxiliary connecting body seat 33 is provided with an auxiliary connecting body groove 331. The connecting body groove 311, the auxiliary connecting body groove 331, and the elbow groove 321 together form the molding groove required for the injection molding of the double elbow. Several auxiliary connecting body seats 33 are provided between the elbow seat 32 and the mold core seat 31. In this embodiment, the specification of each auxiliary connecting body seat 33 is 10mm. When there is no auxiliary connecting body seat 33 between the elbow seat 32 and the mold core seat 31, the specification of the double elbow that can be achieved is 100mm.

[0028] Considering that injection molds are not like other equipment, requiring frequent adjustments to the distance between the elbow seat 32 and the mold core seat 31, and that a batch of double elbows generally needs to be completed after the setting, the auxiliary connecting body seat 33 does not need to be always set in the mold core cavity 21. Therefore, in this embodiment, the auxiliary connecting body seat 33 is inserted into the mold core cavity 21. Specifically, the auxiliary connecting body seat 33 includes a cuboid body and insertion protrusions 332 on both sides of the body. The mold core cavity 21 is provided with insertion grooves 22 that cooperate with the connecting protrusions 333. It should be noted that, since one side of the auxiliary connector seat 33 cannot contact the side wall of the mold core cavity 21, in this embodiment, a placement groove 23 for placing the auxiliary connector seat 33 is provided at the bottom of the mold core cavity 21. The placement groove 23 has two purposes. The first purpose is to make the auxiliary connector seat 33 more stable in the mold core cavity 21. The second purpose is to provide the insertion groove 22 on the other side of the auxiliary connector seat 33. This also makes the height of the connecting protrusions 333 on both sides of the auxiliary connector seat 33 different.

[0029] Because the bend of the double elbow is a tubular structure, a bend-forming mold core 341 is needed to fill the bend portion and ensure that the molded product has a bend. Therefore, a bend-forming mold core seat 34 is also provided inside the mold core cavity 21 of the moving mold 2, and the bend-forming mold core 341 is mounted on the bend-forming mold core seat 34. Since the bend-forming mold core 341 cannot be made in half, the bend-forming mold core seat 34 is only provided inside the mold cavity of the moving mold 2. However, the mold core cavity 21 of the fixed mold 1 also needs to be reserved. The only difference between the fixed mold 1 and the moving mold 2 is the setting of the elbow shaping mold core seat 34. Since the elbow shaping mold core 341 is set to fit the elbow part, the elbow shaping mold core seat 34 is set on one side of the elbow seat 32. The elbow shaping mold core seat 34 is slidably set in the mold core cavity 21. In this embodiment, the moving mold 2 is also equipped with an adjusting cylinder 5, which extends through the moving mold 2 into the mold core cavity 21. The power end of the adjusting cylinder 5 is connected to the elbow shaping mold core seat 34. Of course, since the travel distance of the elbow seat 32 and the elbow shaping mold core seat 34 must be the same, the adjusting cylinder 5 and the telescopic cylinder 4 can be a single double-rod cylinder.

[0030] Since the elbow shaping mold core 341 is located inside the double elbow, in order to facilitate the removal of the double elbow from the mold, the elbow shaping mold core 341 is inserted and pulled onto the elbow shaping mold core seat 34. At the same time, the elbow shaping mold core 341 is also an insert structure (composed of two pillars).

[0031] Considering that gaps between the auxiliary connecting body seat 33, the mold core seat 31, and the elbow seat 32 are unavoidable during the injection molding process of the double elbow formed by the spliced ​​structure, in order to reduce subsequent processing, in this embodiment, a connecting protrusion 333 is provided on the top of the end of the main body near the mold core seat 31, and a connecting inclined surface 312 that mates with the connecting protrusion 333 is provided on the mold core seat 31. The bottom surface of the connecting protrusion 333 is also inclined. An auxiliary inclined surface 334 is provided on the top of the end of the main body away from the mold core seat 31, and an auxiliary protrusion 322 that mates with the auxiliary inclined surface 334 is provided on the side of the elbow seat 32 near the main body. At the same time, liquid storage grooves 335 are provided on both the connecting inclined surface 312 and the auxiliary inclined surface 334. The inclined contact method effectively reduces the penetration of molten plastic, thereby reducing subsequent processing steps. At the same time, the inclined design makes it easier to fill the gaps, and the inclined structure also makes it less likely to move with the double elbow, further reducing subsequent processing.

[0032] With the above settings, different numbers of auxiliary connecting body seats 33 can be inserted as needed. In this embodiment, in order to enable the mold to produce more at once, two mold core cavities 21 are provided on both the fixed mold 1 and the moving mold 2.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An adjustable double elbow injection mold, comprising a fixed mold and a moving mold arranged in a mutually cooperating manner, wherein a mold core is provided on the opposite surfaces of the fixed mold and the moving mold, characterized in that, Both the fixed mold and the moving mold have core cavities on their opposite surfaces. The mold core is disposed within the core cavity. The mold core includes a core seat disposed in the middle of the core cavity, which divides the core cavity into two chambers, one on the left and one on the right. The core seat has a connecting groove. Elbow seats are disposed on both sides of the core seat, each with an elbow groove. The elbow seats are slidably disposed within the core cavity. An auxiliary connecting seat is also disposed between the elbow seats and the core seat, with an auxiliary connecting groove. The main body groove, auxiliary connecting body groove, and elbow groove constitute the molding groove required for injection molding of double elbows. Several auxiliary connecting body seats are provided between the elbow seat and the mold core seat. The auxiliary connecting body seats are inserted into the mold core cavity. An elbow shaping mold core seat is also provided in the mold core cavity of the moving mold. An elbow shaping mold core is provided on the elbow shaping mold core seat. The elbow shaping mold core seat is located on one side of the elbow seat. The elbow shaping mold core seat is slidably disposed in the mold core cavity. The elbow shaping mold core is inserted and removed from the elbow shaping mold core seat.

2. The adjustable double elbow injection mold according to claim 1, characterized in that, Both the fixed mold and the moving mold are equipped with telescopic cylinders, which extend into the mold core cavity. The power end of the telescopic cylinder is connected to the elbow seat.

3. The adjustable double elbow injection mold according to claim 2, characterized in that, The auxiliary connector seat includes a rectangular body and insertion protrusions on both sides of the body. The mold core cavity is provided with an insertion groove that mates with the insertion protrusions. The top of the body near the mold core seat has a connecting protrusion. The mold core seat has a connecting inclined surface that mates with the connecting protrusions. The top of the body away from the mold core seat has an auxiliary inclined surface. The elbow seat has an auxiliary protrusion that mates with the auxiliary inclined surface on the side near the body.

4. The adjustable double elbow injection mold according to claim 3, characterized in that, The bottom of the mold core cavity is provided with a placement groove for placing the auxiliary connector seat.

5. The adjustable double elbow injection mold according to claim 4, characterized in that, The moving mold is also equipped with an adjusting cylinder, which extends through the moving mold into the mold core cavity, and the power end of the adjusting cylinder is connected to the elbow shaping mold core seat.

6. The adjustable double elbow injection mold according to claim 5, characterized in that, Liquid storage tanks are provided on both the connecting inclined surface and the auxiliary inclined surface.

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