Device for extrusion traction forming

Abstract

The utility model discloses a device for extrusion traction molding, which relates to the technical field of plastic molding, and comprises two groups of pincer bodies in cross distribution, the two groups of pincer bodies are movably connected through a common shaft point, the two pincer bodies are delimited by the shaft point to respectively form two pincer handle parts and two pincer blade parts, and when the two pincer handle parts are in a holding state and are connected with a traction rope, the two pincer handle parts are connected with the traction rope. And the two clamp blade parts are meshed on the blank. According to the utility model, the two groups of crossed clamp bodies are movably connected through the common axial point to form the clamp handle part and the clamp blade part, so that the clamp handle part and the clamp blade part can be efficiently connected and occluded on a parison through the traction rope in a holding state, the extrusion traction forming is realized, and the operation flexibility and the forming efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic forming, and particularly relates to a device for extrusion traction forming. BACKGROUND

[0002] The existing extrusion traction operation process is as follows: an operator first uses a tool to lengthen and thin the parison at the outlet of the die head, then bends the end of the parison into a hook shape. Next, the rope sleeve of the traction rope is sleeved on the end of the hook-shaped parison, and the hook-shaped end is hardened through water cooling. Finally, under the action of the traction machine, the traction rope is pulled until the parison reaches the traction machine, completing the entire traction process.

[0003] However, this traction method is mainly suitable for profiles with large cavities. For profiles with smaller cavities, traction can only be completed with the die head opened. Specifically, when a profile with a small cavity is being pulled, the volume of the bent end of the parison may increase due to manual operation of the tool. After being hardened through water cooling, the end of the parison is prone to being stuck in the inner cavity of the fixed block of the die head or the cooling water tank when passing through the die head or the cooling water tank, resulting in die blockage and thus traction failure. This not only affects production efficiency, but also causes waste of raw materials and energy.

[0004] Therefore, the utility model provides a device for extrusion traction forming, which can realize traction connection without bending the end of the parison. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at: in order to solve the problem in the prior art, and propose a kind of device for extrusion traction forming, the device is designed by two jaw bodies, not only can the quick detachable connection between traction rope and parison, and two jaw bodies and parison are connected in occlusion state, parison end volume will not be made larger, ensure that parison can smoothly pass through traction path.

[0006] To solve the above problems, the utility model provides the following technical scheme:

[0007] A device for extrusion traction forming includes two groups of jaw bodies distributed in cross, and the two groups of jaw bodies are movably connected through a common shaft point, the two jaw bodies are divided into two jaw handle parts and two jaw blade parts by the shaft point, when the two jaw handle parts are in the closed state and connected with the traction rope, the two jaw blade parts are occluded on the parison.

[0008] As a further scheme of the utility model: the device further includes an adapter for connecting the traction rope and the two jaw handle parts, the adapter includes a traction block, one end of the traction block is fixedly connected with the traction rope, the other end is detachably connected with the two jaw handle parts, and the two jaw bodies and the traction block jointly form a towing whole.

[0009] As a further scheme of the utility model: two handle parts are provided with connecting blocks, the traction block end is provided with a limiting slot for the two connecting blocks to movably insert, and the insertion direction is perpendicular to the length direction of the pliers body.

[0010] As a further scheme of the utility model: when the two handle parts are in the closed state, the whole formed by the two connecting blocks is dovetail-shaped, and the limiting slot is dovetail-shaped and matched with the whole.

[0011] As a further scheme of the utility model: the limiting slot is provided as a blind hole slot.

[0012] As a further scheme of the utility model: when the two handle parts are in the closed state, the gap for clamping and accommodating the parison is formed between the two blade parts.

[0013] As a further scheme of the utility model: the similar sides of the two blade parts are provided with engaging tooth groups, and the area between the two engaging tooth groups constitutes the gap.

[0014] As a further scheme of the utility model: the engaging tooth groups are provided as multiple groups and are arranged in parallel on the blade part.

[0015] As a further scheme of the utility model: the engaging tooth groups include multiple engaging teeth arranged along the length direction of the blade part, and the multiple engaging teeth on the two engaging tooth groups are arranged in a staggered state.

[0016] As a further scheme of the utility model: the cantilever end of the engaging tooth is provided with a chamfered surface.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The device has the advantages that the innovative pliers body design is connected movably through two groups of cross-distributed pliers bodies with a common shaft point, forms a handle part and a blade part, can be connected by a traction rope and clamped on a parison in a closed state, realizes extrusion traction forming, and improves the operation flexibility and forming efficiency.

[0019] 2. The device realizes flexible and stable detachable connection of the traction rope and the handle part by introducing an adapter, so that the whole device forms a whole convenient to drag, and the convenience and adaptability of use are improved.

[0020] 3. The design of the connecting block and the limiting slot makes the connection between the handle part and the traction block more stable, and the movable insertion mode allows the pliers body to move freely in a specific direction while maintaining the connection with the traction block, thereby improving the stability and operation flexibility of the device.

[0021] 4. When the clamp handle is in the gripping state, the dovetail-shaped integral of the connecting blocks and the matching design of the limiting groove not only enhance the connection strength, but also ensure the stability of the clamp body under force, further optimizing the reliability and durability of the device.

[0022] 5. The limiting groove is designed as a blind hole groove, which effectively prevents the connecting block from accidentally falling off, improves the safety of the device, and simplifies the structure, making it easier to maintain and operate.

[0023] 6. The gap design between the clamping blades is specifically designed to clamp and accommodate the blank, ensuring clamping stability and improving product quality.

[0024] 7. The design incorporates a set of meshing teeth on the cutting edge of the clamps, which enhances the clamping force of the clamps on the blank. At the same time, the area between the meshing teeth forms a gap, which ensures the clamping effect while avoiding excessive squeezing, demonstrating the precision and practicality of the design.

[0025] 8. Multiple sets of meshing teeth are arranged in parallel on the clamping edge, which further enhances the clamping force and stability, ensures uniform force during the molding process, and improves the molding accuracy of the product.

[0026] 9. The multiple meshing teeth on the meshing tooth assembly are arranged in an interlaced manner. This design not only improves the clamping effect, but also enhances the adaptability of the clamping blade to the blank, making the molding process more flexible and efficient.

[0027] 10. The beveled surface at the cantilever end of the meshing tooth helps to reduce resistance during meshing and improve meshing efficiency. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the two clamps in this utility model;

[0030] Figure 2 This is a three-dimensional structural diagram of the two clamps and the traction block in this utility model;

[0031] Figure 3 This is a three-dimensional structural diagram of the traction block in this utility model;

[0032] Figure 4 This is a front view schematic diagram of the two clamps and the traction block in this utility model;

[0033] Figure 5 This is a front view schematic diagram of the two clamps and the preform in this utility model.

[0034] In the diagram: 1. Pliers body; 101. Pliers handle; 102. Pliers blade; 2. Axis point; 3. Traction block; 4. Connecting block; 5. Limiting groove; 6. Gap; 7. Meshing teeth; 8. Beveled surface; a. Traction rope; b. Preform; c. Extrusion die. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figures 1-5 As shown, a device for extrusion traction molding includes two sets of clamps 1, which are arranged crosswise and connected by a common pivot point 2 (preferably a riveted structure, but other conventional connection structures in the prior art can also be used). Figure 1 From a visual perspective, using axis point 2 as the boundary, the two clamp bodies 1 can be divided into two clamp handles 101 on the left and two clamp blades 102 on the right. When the two clamp handles 101 move relative to each other, they can drive the two clamp blades 102 to perform corresponding clamping actions. Before traction, the two clamp handles 101 are used to connect with the traction rope a, and the two clamp blades 102 are used to clamp and engage with the preform b. The extrusion die c continuously outputs the preform b. This state can be achieved by... Figure 5 This is illustrated below. When traction is required, the traction rope a drives the two clamp handles 101 to move to the left. Since the two clamp blades 102 engage with the blank b, the blank b can be pulled to the left. Compared to the prior art, which requires bending the end of the blank b to allow the traction rope a to be looped, this application can achieve a good connection between the traction rope a and the blank b by setting two clamp bodies 1, without changing the shape of the end of the blank b. The end of the blank b remains in its original shape, meaning that the volume of the end of the blank b will not increase and prevent it from passing through the mold or cooling water tank.

[0037] like Figures 2-4As shown, to facilitate a quick connection between the two clamp handles 101 and the traction rope a, this application also includes an adapter for connecting the traction rope a and the two clamp handles 101. The adapter includes a traction block 3, one end of which is fixedly connected to the traction rope a, and the other end is detachably connected to the two clamp handles 101. Before use, the traction block 3 is not connected to the two clamp handles 101. Subsequently, the two clamp blades 102 are first engaged on the blank b, and then the clamp handles 101 in the gripping state are connected to the traction block 3, so that the two clamp bodies 1 and the traction block 3 together form a dragging unit for pulling the blank b. It should be noted that the fixed connection between the traction block 3 and the traction rope a can be: opening a hole at the end of the traction block 3, and tying the traction rope a to the hole. The detachable connection between the traction block 3 and the two clamp handles 101 can be: snap-fit ​​or latching, etc.

[0038] like Figures 4-5 As shown, specifically, this application designs the detachable connection between the traction block 3 and the two clamp handles 101 as follows: A connecting block 4 is provided on each of the two clamp handles 101, and a limiting groove 5 is provided at the end of the traction block 3 for the two connecting blocks 4 to be movably inserted, with the insertion direction perpendicular to the length direction of the clamp body 1. During installation, with... Figure 4 As can be seen, when the two connecting blocks 4 are positioned opposite the limiting groove 5, they can be moved inwards towards the paper and inserted into the limiting groove 5. This inward-facing insertion direction is perpendicular to the horizontal direction. The installed state can be determined by... Figure 2 To represent it.

[0039] like Figure 4 As shown, to ensure a secure installation between the two connecting blocks 4 and the limiting groove 5, the shape of the two connecting blocks 4 when the two clamp handles 101 are in the gripping state can be defined. For example, the two connecting blocks 4 can be dovetail-shaped when the two clamp handles 101 are in the gripping state. Correspondingly, the limiting groove 5 is also set to a dovetail shape. Therefore, based on this wedge-shaped design of the two connecting blocks 4 and the limiting groove 5, a secure connection can be made between the two clamp handles 101 and the traction block 3. Figure 3 As shown, preferably, the limiting groove 5 is configured as a blind hole groove, so that the two connecting blocks 4 will not experience bidirectional positional displacement within the limiting groove 5. It should be noted that, in this application, the two connecting blocks 4 and the limiting groove 5 are preferably shaped like dovetails so that they can generate a connecting force along the traction direction. If other shapes in the prior art can also achieve the above-mentioned effects, they are also applicable to this application.

[0040] For example Figures 4-5As shown, based on the design of the two jaw blade parts 102 occlusion type embryo b in the present application, in order to prevent the two jaw blade parts 102 occlusion too large and cause the embryo b fracture, the present application will be two jaw handle part 101 in the grip state, design two jaw blade parts 102 between the gap 6 for clamping and accommodating embryo b, that is, when the two jaw blade parts 102 in the open state of the clamping action, the inner side of the two jaw blade parts 102 will first with embryo b, clamping action continues, the two jaw blade parts 102 will be on the embryo b pressure causes the embryo b deformation, until the two jaw handle part 101 in the grip state for clamping action, the two jaw blade parts 102 will keep clamping state, because there is a gap 6 between the two jaw blade parts 102, so that the embryo b clamping contained in the gap 6 will not be all clamped off.

[0041] As shown in the figure, Figures 1-2 And as shown in the figure, Figures 4-5 In order to increase the horizontal drag force of the jaw blade part 102 after clamping the embryo b, to ensure that the traction process is stable, the present application is provided with a set of engagement teeth on the side of the two jaw blade parts 102, and the area between the two sets of engagement teeth constitutes the above-mentioned gap 6. During the clamping action of the two jaw blade parts 102, the engagement teeth set will be used to achieve clamping and occlusion. The existence of the engagement teeth set will make the jaw blade part 102 and the embryo b be connected in an embedded manner, so that the horizontal drag force between the jaw blade part 102 and the embryo b will be improved under this connection mode.

[0042] Specifically, the engagement teeth set includes a plurality of engagement teeth 7 arranged along the length direction of the jaw blade part 102, and the plurality of engagement teeth 7 on the two engagement teeth sets are arranged in an interlaced state. The engagement teeth 7 arranged in an interlaced state can achieve uniform embedding of the embryo b, so that the embryo b is uniformly subjected to the action of the engagement teeth 7. In order to further smoothly embed the engagement teeth 7 into the embryo b, a chamfer 8 can be provided on the cantilever end of the engagement teeth 7. During the clamping and occlusion action of the two jaw blade parts 102, the chamfer 8 will first contact the embryo b, so that the engagement teeth 7 can be smoothly embedded in the embryo b during the subsequent gradual gripping process. Preferably, the engagement teeth set is provided with a plurality of sets and arranged in parallel on the jaw blade part 102. Figure 1 The figure shows the case of providing two sets of engagement teeth on the inner side of the jaw blade part 102. Of course, during actual use, the number of engagement teeth sets can be designed according to the type and size of the embryo b.

[0043] The above describes one embodiment of the present application in detail, but the content described above is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A device for extrusion draw forming, characterized in that, The device comprises two sets of cross-distributed pincer bodies (1), and the two sets of pincer bodies (1) are movably connected through a common shaft point (2), and the two pincer bodies (1) are divided into two pincer handle parts (101) and two pincer blade parts (102) by the shaft point (2), when the two pincer handle parts (101) are in a clamping state and connected with the traction rope (a), the two pincer blade parts (102) are clamped on the parison (b).

2. A device for extrusion draw forming according to claim 1, characterised in that, The device further comprises an adapter for connecting the traction rope (a) and the two pincer handle parts (101), the adapter comprises a traction block (3), one end of the traction block (3) is fixedly connected with the traction rope (a), and the other end is detachably connected with the two pincer handle parts (101), and the two pincer bodies (1) and the traction block (3) jointly form a dragging whole.

3. A device for extrusion draw forming according to claim 2, characterised in that, The two pincer handle parts (101) are each provided with a connecting block (4), and the traction block (3) is provided with a limiting groove (5) for movably embedding the two connecting blocks (4), and the embedding direction is perpendicular to the length direction of the pincer body (1).

4. A device for extrusion draw forming according to claim 3, characterised in that, When the two pincer handle parts (101) are in a clamping state, the whole formed by the two connecting blocks (4) is dovetail-shaped, and the limiting groove (5) is dovetail-shaped matched with the whole.

5. A device for extrusion draw forming according to claim 3 or 4, characterised in that, The limiting groove (5) is provided as a blind hole groove.

6. A device for extrusion draw forming according to any one of claims 1 to 4, characterised in that, When the two pincer handle parts (101) are in a clamping state, a gap (6) for clamping and accommodating the parison (b) is formed between the two pincer blade parts (102).

7. A device for extrusion draw forming according to claim 6, characterised in that, The proximal sides of the two pincer blade parts (102) are each provided with an engaging tooth group, and the area between the two engaging tooth groups constitutes the gap (6).

8. A device for extrusion draw forming according to claim 7, characterised in that, The engaging tooth group is provided as multiple groups and arranged in parallel on the pincer blade part (102).

9. A device for extrusion draw forming according to claim 7, characterised in that, The engaging tooth group comprises multiple engaging teeth (7) arranged along the length direction of the pincer blade part (102), and the multiple engaging teeth (7) on the two engaging tooth groups are arranged in a mutually staggered state.

10. A device for extrusion draw forming according to claim 9, characterised in that, The cantilever end of the engaging tooth (7) is provided with a chamfered surface (8).

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