A mechanical and hydraulic combined extruder for extrusion molding of plastic materials

Abstract

The present invention discloses a mechanical hydraulic combined extruder for plastic material extrusion molding, including a bracket, an extrusion working cylinder and a screw feeder. The extrusion working cylinder includes a main hydraulic oil cylinder and a material cylinder. A push piston is arranged in the material cylinder, and the push piston is connected to the piston rod of the main hydraulic cylinder. Two hollow shaft heads are symmetrically arranged on the outside of the material cylinder. The material cylinder is rotatably connected to the brackets on both sides through the hollow shaft heads. Small hydraulic cylinders I for driving the extrusion working cylinder to rotate are hinged on both sides of the material cylinder. Two screw feeders are respectively arranged on both sides of the extrusion working cylinder. The screw feeder is driven by the small hydraulic cylinder II to move on the guide rail. The discharge end of the screw feeder is provided with a conveying pipeline that can pass through the center hole in the hollow shaft head and extend into the material cylinder. The present invention combines mechanical screw feeding with hydraulic extrusion molding, which not only realizes rapid feeding, but also meets the requirements for extrusion pressure during plastic material extrusion molding, thereby improving work efficiency and product molding effect.

Description

Technical Field

[0001] The invention relates to the field of extrusion machinery, in particular to a mechanical and hydraulic combined extruder used for extrusion molding of plastic materials. Background Art

[0002] At present, plate-shaped building materials are a product with high consumption, mainly used for exterior wall hangings, indoor floors, and countertop decorations. The main materials are natural stone plates, ceramic plates, and artificial stone plates. Natural stone plates are formed by mechanical cutting of recovered stones, ceramic plates are mainly formed by pressing powder and then calcining, and artificial stone plates are formed by mixing pulverized stone with powder and resin, injecting it into a mold, and then drying it.

[0003] The finished products of the above three types of panels are very exquisite and are widely used in the construction industry. However, due to the increasingly depleted resources of natural stone panels, there are conditions that limit the mining; the cost of ceramic panels is too high, especially the energy consumption is high; artificial stone panels consume more than 10% of resin and have poor thermal vibration resistance. The traditional molding process has the disadvantages of high labor intensity and low efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages and provide an extrusion molding equipment which is efficient, energy-saving and reduces social labor intensity.

[0005] To achieve the above technical objectives, the technical solution of the present invention is: a mechanical hydraulic combined extruder for extrusion molding of plastic materials, comprising a pair of brackets, an extrusion working cylinder and two screw feeders;

[0006] The extrusion working cylinder includes a main hydraulic oil cylinder and a material cylinder connected thereto, a pushing piston is arranged in the material cylinder, the pushing piston is connected to the piston rod of the main hydraulic cylinder, two hollow shaft heads are symmetrically arranged outside the material cylinder, the center hole in the hollow shaft head is communicated with the inner cavity of the material cylinder, a vacuum pump for evacuating the inner cavity of the material cylinder is connected to the material cylinder, a forming mold is installed at the discharge end of the material cylinder, the material cylinder is rotatably connected to the brackets on both sides through the two hollow shaft heads, and a small hydraulic cylinder I for driving the extrusion working cylinder to rotate is hinged on both sides of the material cylinder;

[0007] The two screw feeders are respectively arranged on both sides of the extrusion working cylinder. The screw feeders are placed on the guide rails on the workbench through sliders. A small hydraulic cylinder II is arranged on the workbench to drive the screw feeders to move along the guide rails. The discharge ends of the two screw feeders are located close to the side of the extrusion working cylinder and are provided with a conveying pipe. The conveying pipe can pass through the center hole in the hollow shaft head and extend into the material cylinder.

[0008] Furthermore, a pin shaft is provided on each side of the material cylinder, which is parallel to the hollow shaft head and has a certain distance from the hollow shaft head, and the piston rod end of the small hydraulic cylinder I is hinged to the pin shaft.

[0009] Furthermore, the maximum rotation range of the extrusion working cylinder is 90°.

[0010] Furthermore, the pin shaft is arranged on a side close to the discharge end of the material cylinder.

[0011] Furthermore, it also includes a support frame, and when the extrusion working cylinder is in a horizontal state, one end of the main hydraulic cylinder of the extrusion working cylinder is placed on the support frame.

[0012] Furthermore, a matching automatic cutting machine is provided on one side of the discharge end of the extrusion working cylinder.

[0013] The beneficial effects of the present invention are:

[0014] (1) The present invention combines mechanical spiral feeding with hydraulic extrusion molding, which can not only achieve rapid feeding, but also meet the requirements of extrusion pressure during plastic material extrusion molding, thereby improving work efficiency and product molding effect;

[0015] (2) The small hydraulic cylinder II pushes the screw feeder to move toward the extrusion working cylinder, so that the conveying pipe passes through the center hole in the hollow shaft head and extends into the middle of the material cylinder for feeding, which can prevent the material from sticking to the wall of the material cylinder;

[0016] (3) When feeding, the small hydraulic cylinder I drives the extrusion working cylinder to be in an upright state. The material enters through the conveying pipe extending into the middle of the material cylinder and then falls freely to the mold, which can make the material distribution in the material cylinder more uniform and dense;

[0017] (4) An automatic cutting machine is installed at the discharge end of the extrusion cylinder to realize the fully automatic production of materials such as plates, which has a wide range of applications and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0020] Figure 3 It is a side structural schematic diagram of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the extrusion working cylinder of the present invention. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0023] like Figure 1 — Figure 4 As shown, the mechanical-hydraulic combined extruder for plastic material extrusion molding of this embodiment includes a pair of brackets 1, an extrusion working cylinder 2 and two screw feeders 3.

[0024] The extrusion working cylinder 2 includes a main hydraulic oil cylinder 201 and a material cylinder 205 connected thereto, a pushing piston 203 is arranged in the material cylinder 205, and the pushing piston 203 is connected to the main hydraulic cylinder piston rod 202, and two hollow shaft heads 204 are symmetrically arranged on the outside of the material cylinder 205, and the center hole in the hollow shaft head 204 is communicated with the inner cavity of the material cylinder 205, and a vacuum pump for evacuating the inner cavity of the material cylinder 205 is connected to the material cylinder 205, and a forming mold 9 is installed at the discharge end of the material cylinder 205, and the material cylinder 205 is rotatably connected to the brackets 1 on both sides through the two hollow shaft heads 204, and two pin shafts 8 are symmetrically arranged on the outside near the discharge end of the material cylinder 205. The pin shafts 8 are parallel to the hollow shaft head 204 and are a certain distance away from the hollow shaft head 204, and a small hydraulic cylinder Ⅰ6 for driving the extrusion working cylinder 2 to rotate is hinged on the two pin shafts 8, and the maximum rotation range of the extrusion working cylinder 2 is 90°. To leave space for the extrusion cylinder to rotate to the upright state, a foundation pit 7 is provided under the extrusion cylinder 2. Preferably, a support frame 10 is further included, and one end of the main hydraulic cylinder 201 of the extrusion cylinder 2 is placed on the support frame 10 when the extrusion cylinder 2 is in a horizontal state.

[0025] The two screw feeders 3 are respectively arranged on both sides of the extrusion working cylinder 2. The screw feeders 3 are placed on the guide rails 5 on the workbench through the sliders. A small hydraulic cylinder II 4 is arranged on the workbench to drive the screw feeders 3 to move along the guide rails 5. The discharge ends of the two screw feeders 3 are both located near the side of the extrusion working cylinder 2 and are provided with a conveying pipeline, which can pass through the center hole in the hollow shaft head 204 and extend into the material cylinder 205. A matching automatic cutting machine (not shown in the figure) is also arranged on one side of the discharge end of the extrusion working cylinder.

[0026] The working principle of the present invention is as follows: when the small hydraulic cylinder I6 pulls the extrusion working cylinder 2 to stand upright, the piston rod 202 of the main hydraulic cylinder returns to the upper position, and the pushing piston 203 returns to the upper position at the same time. The piston rod of the small hydraulic cylinder Ⅱ4 pushes the conveying pipe of the screw feeder 3 into the middle range of the material cylinder 205 to start feeding the material. After the material enters, it falls freely to the mold until it fills the material cylinder. The degree of filling is determined by the production demand; after the feeding is completed, the piston rod of the small hydraulic cylinder Ⅱ4 retracts to pull the screw feeder 3 back to its original position. After the return action is completed, the pushing piston 203 covers the material entering the cylinder under the push of the main hydraulic cylinder piston rod 202. The piston rod of the small hydraulic cylinder Ⅰ6 begins to extend and pushes the extrusion working cylinder 2 to a horizontal state. At this time, the main hydraulic cylinder piston rod 202 moves forward and pressurizes the material through the pushing piston 203 until the material is squeezed out from the mold mouth; the material cylinder is equipped with a vacuum pump. The first extrusion makes the material block the channel for air entering from the mold mouth. The second feeding starts to extract the air, so that the material is in a vacuum state. The required product is formed when it is extruded again, and the automatic cutting machine cuts the extruded product.

[0027] The invention can extrude the mixed plastic of cement, crushed stone and water into regular plate-shaped building materials, and can also be used for extrusion molding of other refractory materials, ceramics and other raw materials.

[0028] With the aid of the teachings presented in the foregoing description and the associated drawings, many modifications and other embodiments of the present invention will occur to those skilled in the art to which the present invention pertains. Therefore, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and modifications and other embodiments are considered to be included within the scope of the appended claims. Although specific terms are used herein, they are used in a generic and descriptive sense only and not for limitation.

Claims

1. A mechanical and hydraulic combined extruder for extrusion molding of plastic materials, characterized in that: It includes a pair of brackets, an extrusion working cylinder and two screw feeders; The extrusion working cylinder includes a main hydraulic oil cylinder and a material cylinder connected thereto, a pushing piston is arranged in the material cylinder, the pushing piston is connected to the piston rod of the main hydraulic cylinder, two hollow shaft heads are symmetrically arranged outside the material cylinder, the center hole in the hollow shaft head is communicated with the inner cavity of the material cylinder, a vacuum pump for evacuating the inner cavity of the material cylinder is connected to the material cylinder, a forming mold is installed at the discharge end of the material cylinder, the material cylinder is rotatably connected to the brackets on both sides through the two hollow shaft heads, and a small hydraulic cylinder I for driving the extrusion working cylinder to rotate is hinged on both sides of the material cylinder; The two screw feeders are respectively arranged on both sides of the extrusion working cylinder. The screw feeders are placed on the guide rails on the workbench through sliders. A small hydraulic cylinder II is arranged on the workbench to drive the screw feeders to move along the guide rails. The discharge ends of the two screw feeders are located close to the side of the extrusion working cylinder and are provided with a conveying pipe. The conveying pipe can pass through the center hole in the hollow shaft head and extend into the material cylinder.

2. A mechanical-hydraulic combined extruder for plastic material extrusion molding as claimed in claim 1, characterized in that: A pin shaft is provided on both sides of the material cylinder, which is parallel to the hollow shaft head and has a certain distance from the hollow shaft head. The piston rod end of the small hydraulic cylinder I is hinged to the pin shaft.

3. A mechanical-hydraulic combined extruder for plastic material extrusion molding as claimed in claim 1, characterized in that: The maximum rotation range of the extrusion working cylinder is 90°.

4. A mechanical-hydraulic combined extruder for plastic material extrusion molding as claimed in claim 2, characterized in that: The pin shaft is arranged on a side close to the discharge end of the material cylinder.

5. A mechanical-hydraulic combined extruder for plastic material extrusion molding as claimed in claim 1, characterized in that: It also includes a support frame. When the extrusion working cylinder is in a horizontal state, one end of the main hydraulic oil cylinder of the extrusion working cylinder is placed on the support frame.

6. A mechanical-hydraulic combined extruder for plastic material extrusion molding as claimed in any one of claims 1 to 5, characterized in that: A matching automatic cutting machine is also provided on one side of the discharge end of the extrusion working cylinder.

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