Elbow die for pipe forming
By designing elbow molds with movable modules, the problems of high injection molding cost and low secondary processing efficiency in the prior art are solved, efficient molding and convenient mold release are achieved, and the production efficiency and product quality of plastic pipe molding are improved.
Patent Information
- Application Number
- CN202420930998.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In the existing plastic pipe molding technology, the injection molding method is costly and is not suitable for large diameter and super large elbow production, while the secondary processing method after extrusion is inefficient and has large labor and energy consumption.
An elbow mold for pipe forming is designed, including two main mold cores connected by snap-ons. The mold consists of upper, lower, left and right modules. The modules can be moved independently or in concert to achieve molding and demolding states. Switch.
The mold can efficiently mold pipes with curved shapes, reduce labor consumption, improve production efficiency, and ensure molding accuracy and mold release convenience through flexible movement of the module.
Smart Images
Figure CN222451333U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic pipe molding, and in particular relates to an elbow mold used for pipe molding. Background Art
[0002] In the process of plastic pipe forming, the molten material strip extruded by the extruder passes through the die and then extrudes the pipe outward. There are two traditional ways to form elbow pipes:
[0003] 1. One-time injection molding:
[0004] This method is suitable for manufacturing small-caliber plastic elbows. Through a dedicated injection molding machine and a precisely designed injection mold, the molten plastic is directly injected into the mold to form a plastic pipe containing an elbow structure in one step. Although this method can directly produce complex elbow shapes, the development and manufacturing costs of the injection mold are high, and it is limited by the pressure of the injection molding machine and the size of the mold. It is not suitable for the production of large-caliber and super-large elbows.
[0005] 2. Secondary processing and molding after extrusion:
[0006] In this method, a continuous straight plastic pipe is first extruded through an extruder, and then the extruded straight pipe is reheated or bent with the help of mechanical force to form the required elbow angle. This method has the problems of relatively low efficiency and high labor and energy consumption. Utility Model Content
[0007] The utility model aims at the above problems existing in the prior art and proposes an elbow mould which can form elbow pipes and is convenient for demoulding the pipes.
[0008] The utility model can be realized through the following technical solutions:
[0009] An elbow die for forming a pipe, comprising:
[0010] The main mold core is provided with two, and the two main mold cores are connected by a buckle, and after being connected, they are spliced into an elbow mold with an arc-shaped bending surface and used for winding the material strip;
[0011] The main mold core is composed of an upper module, a lower module, a left module and a right module, wherein:
[0012] The lower module can move up and down independently, the left module and the right module can move left and right independently, and the lower module, the left module and the right module can move up and down synchronously. Through the movement of the lower module, the left module and the right module, the elbow mold can be switched between a forming state and a demolding state.
[0013] As a further improvement of the utility model, when the elbow mold is in a forming state, the lower module, the left module, and the right module are all in an expanded state, and at this time, the cross-section of any point of the main mold core is a circular structure.
[0014] As a further improvement of the present invention, when the elbow mold is in a demoulding state, the lower module, the left module, and the right module are all in a retracted state.
[0015] As a further improvement of the present invention, a fixing plate is provided in the cavity of the main mold core, and the fixing plate is connected to the upper module.
[0016] As a further improvement of the utility model, a movable support is further provided in the cavity of the main mold core, a main lifting cylinder is provided on the fixed plate, and the movable support is connected to the cylinder shaft of the main lifting cylinder.
[0017] As a further improvement of the utility model, a lower module lifting cylinder is provided on the movable support, and a cylinder shaft of the lower module lifting cylinder is connected to the lower module.
[0018] As a further improvement of the utility model, a left module telescopic cylinder and a right module telescopic cylinder are also provided on the movable support, the cylinder shaft of the left module telescopic cylinder is connected to the left module, and the cylinder shaft of the right module telescopic cylinder is connected to the right module.
[0019] As a further improvement of the present invention, a plurality of guide rods are provided between the fixed plate and the movable support.
[0020] As a further improvement of the present utility model, a plurality of guide rods are respectively provided between the movable support and the lower module, the left module and the right module.
[0021] As a further improvement of the present invention, the joints of the two main mold cores are connected by snap-fits, wherein the snap-fit structure is arranged on the inner walls of the left module and the right module, and when the left module and the right module of one of the main mold cores retract inwardly, the snap-fit structure is automatically unlocked.
[0022] Compared with the prior art, the utility model has the following beneficial effects:
[0023] 1. The two main mold cores are spliced to form an elbow mold. By winding the material strip around the elbow mold, an elbow pipe with a curved surface can be formed. There is no need to bend the straight pipe by manual or mechanical means, which greatly improves work efficiency and reduces manpower expenditure;
[0024] 2. The independent and coordinated movement mechanism of the lower module, left module and right module gives the elbow mold great flexibility and adaptability. During the molding stage, the modules can fit tightly to ensure that the molten material strip is evenly compressed in the mold to form a precise elbow shape; after the molding is completed, the flexible movement between the modules can help to easily demold and reduce the damage or deformation that may be suffered by the pipe during the demolding process;
[0025] 3. Under normal working conditions, the two main mold cores are tightly spliced together by buckles to form a complete elbow mold structure, ensuring the sealing and stability of the mold during the molding process, so that the molten material can accurately cool and solidify into the required elbow pipe according to the shape of the mold; when the mold needs to be disassembled or adjusted, just retract the left and right modules of a main mold core inward, and the buckle structure will automatically unlock during the module retraction process, without additional tools or cumbersome operating steps, the two main mold cores can be easily separated. This design fully considers the ease of use and maintenance of the mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of an elbow die for pipe forming of the utility model;
[0027] Figure 2 It is a schematic diagram of the internal structure of the main mold core of the utility model;
[0028] Figure 3 The utility model Figure 2 The structural diagram on the back;
[0029] Figure 4 It is a structural schematic diagram of the buckle positions of two main body mold cores of the utility model.
[0030] In the figure, 100, main body mold core; 110, buckle; 120, upper module; 130, lower module; 140, left module; 150, right module; 160, fixed plate; 161, main lifting cylinder; 170, movable support; 171, lower module lifting cylinder; 172, left module telescopic cylinder; 173, right module telescopic cylinder; 180, guide rod. DETAILED DESCRIPTION
[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.
[0032] like Figure 1-4 As shown, the utility model provides an elbow mold for pipe forming, comprising:
[0033] The main mold core 100 is provided with two, and the two main mold cores 100 are connected by a buckle 110, and after being connected, they are spliced into an elbow mold with an arc-shaped bending surface and used for winding the material strip;
[0034] The main mold core 100 is composed of an upper module 120, a lower module 130, a left module 140 and a right module 150, wherein:
[0035] The lower module 130 can move up and down independently, the left module 140 and the right module 150 can move left and right independently, and the lower module 130, the left module 140 and the right module 150 can move up and down synchronously. Through the movement of the lower module 130, the left module 140 and the right module 150, the elbow mold can be switched between the molding state and the demolding state.
[0036] That is to say, the two main mold cores 100 are spliced together to form an elbow mold. By winding the material strip around the elbow mold, an elbow pipe with an arc-shaped bend can be formed. There is no need to bend the straight pipe through manual or mechanical assistance, which greatly improves work efficiency and reduces manpower expenses.
[0037] It is also worth mentioning that it is precisely because of the sophisticated design of the main mold core 100 in this embodiment, especially the independent and coordinated movement mechanism of the lower module 130, the left module 140 and the right module 150, that the elbow mold is endowed with great flexibility and adaptability. In the molding stage, each module can fit tightly to ensure that the molten material strip is evenly compressed in the mold to form a precise elbow shape; and after the molding is completed, the flexible movement between the modules can help to easily demold and reduce the damage or deformation that may be suffered by the pipe during the demolding process.
[0038] This design optimizes the entire production process and achieves seamless connection from molding to demolding, which not only ensures product quality, but also greatly improves the degree of production automation and overall efficiency, and effectively solves various problems existing in traditional manual pipe bending methods. It is undoubtedly an important innovation in the plastic pipe molding process.
[0039] Preferably, when the elbow mold is in the forming state, the lower module 130, the left module 140, and the right module 150 are all in the expanded state. The "expanded" here does not mean that they are completely separated, but means that each module is adjusted to a corresponding position around a common central axis to adapt to the envelopment and forming of the material strip while maintaining matching with the elbow profile;
[0040] When the elbow mold is ready to receive and mold the material strip, the various components of the main mold core 100 cooperate closely to jointly construct a cavity consistent with the target elbow size, so that the molten plastic material strip can be accurately cooled and solidified according to the predetermined curvature and shape when passing through the mold.
[0041] Preferably, when the elbow mold is in the demolding state, the lower module 130, the left module 140, and the right module 150 are all in the retracted state. In this way, the arc-shaped bending surface formed will open a sufficient gap so that the pipe can easily be separated from the inside of the mold and enter the next production link.
[0042] Preferably, a fixing plate 160 is provided in the cavity of the main mold core 100 , and the fixing plate 160 is connected to the upper mold block 120 .
[0043] Preferably, a movable support 170 is further provided in the cavity of the main mold core 100, a main lifting cylinder 161 is provided on the fixed plate 160, the movable support 170 is connected to the cylinder shaft of the main lifting cylinder 161, and the movable support 170 is driven to move up and down by the main lifting cylinder 161.
[0044] Preferably, a lower module lifting cylinder 171 is provided on the movable support 170 , and a cylinder shaft of the lower module lifting cylinder 171 is connected to the lower module 130 .
[0045] Similarly, a left module telescopic cylinder 172 and a right module telescopic cylinder 173 are also provided on the movable support 170 . The cylinder shaft of the left module telescopic cylinder 172 is connected to the left module 140 , and the cylinder shaft of the right module telescopic cylinder 173 is connected to the right module 150 .
[0046] That is, the lifting function of the lower module 130 is realized by the lower module lifting cylinder 171, the lateral movement functions of the left module 140 and the right module 150 are respectively realized by the left module telescopic cylinder 172 and the right module telescopic cylinder 173, and the synchronous lifting function of the lower module 130, the left module 140 and the right module 150 is realized by the main lifting cylinder 161, so that the elbow mold can realize the switching between the molding state and the demolding state.
[0047] Preferably, a plurality of guide rods 180 are provided between the fixed plate 160 and the movable support 170, and a plurality of guide rods 180 are provided between the movable support 170 and the lower module 130, the left module 140, and the right module 150, respectively. The existence of the guide rods 180 ensures that the movement trajectory of the movable support 170, the lower module 130, the left module 140, and the right module 150 always remains stable to prevent deviation or shaking, thereby ensuring the accuracy and stability of the movable support 170 and each module during movement.
[0048] Preferably, the joints of the two main mold cores 100 are connected by a buckle 110, wherein the buckle 110 structure is arranged on the inner wall of the left module 140 and the right module 150;
[0049] Under normal working conditions, the two main mold cores 100 are tightly spliced together by the buckle 110 to form a complete elbow mold structure, ensuring the sealing and stability of the mold during the molding process, so that the molten material strip can be accurately cooled and solidified into the required elbow pipe according to the shape of the mold;
[0050] When the mold needs to be disassembled or adjusted, the left module 140 and the right module 150 of a main mold core 100 only need to be retracted inwards. At this time, the buckle 110 structure will be automatically unlocked during the module retraction process. No additional tools or cumbersome operation steps are required, and the two main mold cores 100 can be easily separated. This design fully considers the ease of use and maintenance of the mold.
[0051] To better illustrate the demoulding principle, the specific steps of demoulding are as follows:
[0052] 1. The lower module 130 of the main mold core 100A retracts upward;
[0053] 2. The left module 140 and the right module 150 of the main mold core 100A are retracted inward at the same time, and the connecting buckle 110 between the main mold core 100A and the main mold core 100B is unlocked, and the main mold core 100A and the main mold core 100B are disconnected;
[0054] 3. The movable support 170 of the main mold core 100A moves upward (toward the direction of the fixed plate 160), driving the lower module 130, the left module 140 and the right module 150 to retract upward at the same time. At this time, the main mold core 100A can be removed from the elbow pipe;
[0055] 4. The left module 140 and the right module 150 of the main mold core 100B retract inwards at the same time;
[0056] 5. The movable support 170 of the main mold core 100B moves upward (toward the direction of the fixed plate 160), driving the lower module 130, the left module 140 and the right module 150 to retract upward at the same time. At this time, the main mold core 100B can be removed from the elbow pipe.
[0057] The technical means disclosed in the scheme of the utility model are not limited to the technical means disclosed by the above technical means, but also include technical solutions composed of any combination of the above technical features. The above is a specific implementation method of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.
[0058] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0059] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0060] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0061] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
Claims
1. An elbow mold for pipe forming, characterized in that: include: The main mold core is provided with two, and the two main mold cores are connected by a buckle, and after being connected, they are spliced into an elbow mold with an arc-shaped bending surface and used for winding the material strip; The main mold core is composed of an upper module, a lower module, a left module and a right module, wherein: The lower module can move up and down independently, the left module and the right module can move left and right independently, and the lower module, the left module and the right module can move up and down synchronously. Through the movement of the lower module, the left module and the right module, the elbow mold can be switched between a forming state and a demolding state.
2. The elbow mold for pipe forming according to claim 1, characterized in that: When the elbow mold is in a forming state, the lower module, the left module, and the right module are all in an expanded state, and at this time, the cross section of any point of the main mold core is a circular structure.
3. The elbow mold for pipe forming according to claim 1, characterized in that: When the elbow mold is in a demoulding state, the lower module, the left module, and the right module are all in a retracted state.
4. The elbow mold for pipe forming according to claim 1, characterized in that: A fixing plate is arranged in the cavity of the main mold core, and the fixing plate is connected to the upper mold block.
5. The elbow mold for pipe forming according to claim 4, characterized in that: A movable support is also provided in the cavity of the main mold core, a main lifting cylinder is provided on the fixed plate, and the movable support is connected to the cylinder shaft of the main lifting cylinder.
6. The elbow mold for pipe forming according to claim 5, characterized in that: The movable support is provided with a lower module lifting cylinder, and the cylinder shaft of the lower module lifting cylinder is connected to the lower module.
7. The elbow mold for pipe forming according to claim 5, characterized in that: The movable support is also provided with a left module telescopic cylinder and a right module telescopic cylinder, the cylinder shaft of the left module telescopic cylinder is connected to the left module, and the cylinder shaft of the right module telescopic cylinder is connected to the right module.
8. The elbow mold for pipe forming according to claim 5, characterized in that: A plurality of guide rods are arranged between the fixed plate and the movable support.
9. The elbow mold for pipe forming according to claim 5, characterized in that: A plurality of guide rods are respectively arranged between the movable support and the lower module, the left module and the right module.
10. The elbow mold for pipe forming according to claim 1, characterized in that: The joints of the two main mold cores are connected by snap-fitting, wherein the snap-fitting structure is arranged on the inner walls of the left module and the right module, and when the left module and the right module of one of the main mold cores retract inwardly, the snap-fitting structure is automatically unlocked.