Preforming blank making machine for tubular blanks

Abstract

The preforming blank making machine comprises a bottom plate, a material cylinder is fixed on the bottom plate, a core rod capable of moving up and down is arranged in the center of the material cylinder, a blank cavity is formed between the core rod and the material cylinder, a sealing ring is fixed at the lower end of the core rod, the upper end of the material cylinder is connected with a sealing plate, and the lower end of the material cylinder is connected with the sealing plate. A core rod groove matched with the core rod is formed in the sealing plate, the core rod moves upwards along the core rod groove, the pressing ring is used for extruding a blank so that the pressing ring and the sealing plate can be kept sealed, a driving cylinder is fixed to the lower end of the material cylinder, the telescopic end of the driving cylinder is connected with the core rod, and the core rod is driven to move up and down. The tubular blank making machine solves the problem that an existing blank making machine cannot produce tubular blanks, the core rod is arranged in the center of the material cylinder, the driving cylinder is used for driving the core rod to move up and down, the blanks are extruded by the sealing plate and formed into tubular blanks through movement of the core rod and the sealing ring, and the use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of blank making machines, in particular to a preforming blank making machine for tubular blanks. Background Art

[0002] During production, the pipe extruder usually puts the rod-shaped blank directly into the material cylinder, softens the blank, and then puts the mandrel into the material cylinder to shape the blank in the material cylinder. In this way, in the molding process of each product, the mandrel needs to be removed to make way for the blank, so that the rod-shaped blank can be filled into the material cylinder. The removal and installation of the mandrel greatly reduces the production efficiency;

[0003] Therefore, in order to shorten the filling time of the blank and avoid the removal of the mandrel rod, a tubular blank is designed. By placing the mandrel rod into the center of the tubular blank, the removal of the mandrel rod is avoided. However, the existing blank making machines can only produce rod-shaped blanks and cannot meet the production needs of tubular blanks. Utility Model Content

[0004] The utility model aims to provide a preforming machine for tubular blanks. A core rod is arranged at the center of a material cylinder, and a driving cylinder is used to drive the core rod to move up and down. Through the movement of the core rod and a sealing ring, the blank is squeezed by a sealing plate and formed into a tubular shape to meet the use requirements.

[0005] The utility model provides the following technical solutions: a preforming blank making machine for tubular blanks, comprising a bottom plate, a material cylinder being fixed on the bottom plate, and characterized in that a core rod which can move up and down is arranged at the center of the material cylinder, a blank cavity is formed between the core rod and the material cylinder, a sealing ring is fixed on the lower end of the core rod, a sealing plate is connected to the upper end of the material cylinder, a core rod groove which matches with the core rod is opened on the sealing plate, the core rod moves upward along the core rod groove, a pressure ring is sleeved on the upper end of the core rod, a driving cylinder is fixed to the lower end of the material cylinder, the telescopic end of the driving cylinder is connected to the core rod, and drives the core rod to move up and down.

[0006] In order to improve the installation efficiency of the sealing plate, a sealing plate flange is fixed on the material cylinder, and the sealing plate is connected to the sealing plate flange by bolts, and the sealing plate rotates around the bolts.

[0007] In order to facilitate fixing the sealing plate and aligning the core rod groove with the core rod, a connecting hole is also opened on the side of the sealing plate. The connecting hole and the core rod groove are both waist-shaped grooves, and the diameter of the pressure ring is larger than the width of the waist-shaped groove.

[0008] In order to compact the blank and prevent bubbles or voids in the blank, a vibrator is fixed on the side of the material cylinder.

[0009] In order to improve the connection strength of the cylinder, a bracket is fixed on the bottom plate, and the upper part of the cylinder is fixed on the bracket through a flange.

[0010] In order to conveniently check the pressure of the driving cylinder, a display is also fixed on the bracket.

[0011] In order to guide the materials, a detachable feed hopper is also connected to the sealing plate flange.

[0012] In order to guide the installation of the feed hopper, a positioning step is formed at the lower end of the feed hopper, and the positioning step cooperates with the sealing plate flange.

[0013] In order to prevent the material from impacting the mandrel during feeding and causing the mandrel to deviate, the center of the feed hopper is connected to a mandrel positioning ring through a connecting rod, and the mandrel positioning ring cooperates with the mandrel.

[0014] Compared with the prior art, the beneficial effect achieved by the utility model is as follows: by arranging a core rod in the material cylinder, the core rod is driven up and down by the driving cylinder, and the blank on the side of the core rod moves upward through the movement of the core rod and the sealing ring, the upper end of the blank is squeezed by the pressure ring, and the lower end is squeezed by the sealing ring, and the whole is formed into a tube, which meets the use requirements of the pipe extruder, avoids the disassembly of the forming core rod inside the extruder, and improves the production efficiency of the extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 This utility model Figure 2 A partial enlarged schematic diagram of the middle A area;

[0019] Figure 4 This utility model Figure 2 A partial enlarged schematic diagram of the middle B area;

[0020] Figure 5 It is a structural diagram of the sealing plate of the utility model;

[0021] Figure 6 It is a structural diagram of the feed hopper of the utility model;

[0022] In the figure: 1. driving cylinder; 2. material cylinder; 21. connecting head; 22. sealing ring; 23. core rod; 24. pressing ring; 3. bottom plate; 4. bracket; 5. sealing plate flange; 6. sealing plate; 61. core rod groove; 62. connecting hole; 7. vibrator; 8. feed hopper; 81. positioning step; 82. connecting rod; 83. core rod positioning ring; 9. display. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example

[0025] See also Figures 1 to 4 The utility model provides a technical solution: a preforming machine for tubular blanks, including a bottom plate 3, a material cylinder 2 is fixed on the bottom plate 3, a core rod 23 that can move up and down is arranged at the center of the material cylinder 2, a blank cavity is formed between the core rod 23 and the material cylinder 2, so that the blank is formed into a tube, which is convenient for the blank to be sleeved on the mold inside the extruder, avoiding the disassembly of the mold inside the extruder, a sealing ring 22 is fixed on the lower end of the core rod 23, the sealing ring 22 is used to seal the lower end of the blank cavity, and the sealing ring 22 is fixed between the core rod 23 and the material cylinder 2, and can position the core rod 23, the upper end of the material cylinder 2 is connected to a sealing plate 6, the sealing plate 6 is used to seal the upper end of the blank cavity, and a core rod groove 61 that matches the core rod 23 is opened on the sealing plate 6 , the core rod 23 moves upward along the core rod groove 61, and a driving cylinder 1 is fixed at the lower end of the material cylinder 2. The driving cylinder 1 is an air cylinder or an oil cylinder. The telescopic end of the driving cylinder 1 is connected to the core rod 23 through a connecting head 1 to drive the core rod 23 to move up and down. The core rod 23 is controlled to rise by the telescopic end of the driving cylinder 1. A pressure ring 24 is sleeved on the upper end of the core rod 23. After the core rod 23 rises, it will drive the blank to rise, and further drive the pressure ring 24 upward to resist the sealing plate 6, which is equivalent to the pressure ring 24 squeezing the blank. At this time, the continuous rise of the driving cylinder 1 will drive the core rod 23 to pass through the core rod groove 61 and extend to the top of the sealing plate 6. At the same time, under the pressure of the driving cylinder 1, the blank will be squeezed by the sealing ring 22 and the pressure ring 24, so that the blank is compacted and the molding is more stable.

[0026] A sealing plate flange 5 is fixed on the material cylinder 2, and a sealing plate 6 is connected to the sealing plate flange 5 by bolts. The sealing plate 6 rotates around the bolts, so that the sealing plate 6 is more convenient to open and close.

[0027] like Figure 5As shown, a connecting hole 62 is further provided on the side of the closing plate 6. The connecting hole 62 and the core rod groove 61 are both waist-shaped grooves. The position of the core rod groove 61 is adjusted by rotating the closing plate 6 so that the core rod groove 61 is aligned with the core rod 23. The diameter of the pressure ring 24 is larger than the width of the waist-shaped groove, so that when the core rod 23 and the blank rise together, only the core rod 23 can extend from the core rod groove 61, and the blank is squeezed by the pressure ring 24 to compact the blank.

[0028] A vibrator 7 is fixed to the side of the material cylinder 2. The vibrator 7 is provided to vibrate the material cylinder 2 so that the material in the material cylinder 2 is tightly formed without bubbles and gaps.

[0029] A bracket 4 is fixed on the bottom plate 3, and the upper part of the cylinder 2 is fixed on the bracket 4 through a flange. The upper end of the cylinder 2 is located above the bracket 4, which further enhances the connection strength and rigidity of the cylinder 2 and avoids connection failure of the cylinder 2 under the action of the vibrator.

[0030] A display 9 is also fixed on the bracket 4, through which various parameters of the equipment during operation, such as pressure, temperature, etc., can be viewed.

[0031] A detachable feed hopper 8 is also connected to the sealing flange 5, and the material is guided by the feed hopper 8, thereby reducing material leakage.

[0032] like Figure 6 As shown, a positioning step 81 is formed at the lower end of the feed hopper 8, and the positioning step 81 cooperates with the sealing flange 5. The feed hopper 8 is positioned and installed by inserting the positioning step 81 into the center hole of the sealing flange 5 and rotating it.

[0033] The center of the feed hopper 8 is connected to a core rod positioning ring 83 via a connecting rod 82. The core rod positioning ring 83 cooperates with the core rod 23. By raising the core rod 23 during feeding, the core rod 23 is inserted into the core rod positioning ring 83 to prevent the material from impacting the side of the core rod 23 and causing the core rod 23 to deflect.

[0034] Blank making process: before use, open the sealing plate first, install the feed hopper on the sealing plate flange, guide the material through the feed hopper to make the material fall into the material cylinder, turn on the vibrator while feeding, so that the materials are closer together to avoid bubbles or gaps in the formed blanks. After the material is filled, put the pressure ring on the core rod, remove the hopper, turn off the vibrator, and seal the material cylinder through the sealing plate;

[0035] Start the driving cylinder and use it to drive the core rod to move upward. The movement of the core rod will drive the sealing ring and the pressure ring to move upward. When the core rod moves upward, the core rod will pass through the core rod groove on the sealing plate and extend above the sealing plate. At this time, the blank between the pressure ring and the sealing ring will be subjected to the pressure of the pressure ring, which will compact the blank and make the blank forming stable. Then close the driving cylinder, open the sealing plate, take out the pressure ring and the blank, and complete the production of the blank.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A preforming machine for tubular blanks, comprising a bottom plate, a material cylinder being fixed on the bottom plate, characterized in that: A mandrel that can move up and down is provided at the center of the material cylinder, and a blank cavity is formed between the mandrel and the material cylinder, a sealing ring is fixed on the lower end of the mandrel, and a sealing plate is connected to the upper end of the material cylinder, and a mandrel groove matching the mandrel is opened on the sealing plate, and the mandrel moves upward along the mandrel groove, and a pressure ring is sleeved on the upper end of the mandrel, and a driving cylinder is fixed to the lower end of the material cylinder, and the telescopic end of the driving cylinder is connected to the mandrel to drive the mandrel to move up and down.

2. The preforming machine for tubular blanks according to claim 1, characterized in that: A sealing plate flange is fixed on the material cylinder, and the sealing plate is connected to the sealing plate flange by bolts, and the sealing plate rotates around the bolts.

3. The preforming machine for tubular blanks according to claim 2, characterized in that: A connecting hole is also provided on the side of the sealing plate. Both the connecting hole and the core rod groove are waist-shaped grooves. The diameter of the pressure ring is larger than the width of the waist-shaped groove.

4. The preforming machine for tubular blanks according to claim 1, characterized in that: A vibrator is fixed on the side of the material cylinder.

5. The preforming machine for tubular blanks according to claim 1, characterized in that: A bracket is fixed on the bottom plate, and the upper part of the material cylinder is fixed on the bracket through a flange.

6. The preforming machine for tubular blanks according to claim 5, characterized in that: A display is also fixed on the bracket.

7. The preforming machine for tubular blanks according to claim 2, characterized in that: The sealing plate flange is also connected with a detachable feed hopper.

8. The preforming machine for tubular blanks according to claim 7, characterized in that: A positioning step is formed at the lower end of the feed hopper, and the positioning step cooperates with the sealing plate flange.

9. The preforming machine for tubular blanks according to claim 8, characterized in that: The center of the feed hopper is connected with a core rod positioning ring through a connecting rod, and the core rod positioning ring cooperates with the core rod.

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