Plastic powder melting briquetting device

Abstract

The utility model relates to the technical field of powder forming, in particular to a plastic powder melting briquetting device which comprises a rack, a mold unit, a pressure applying unit and a demolding unit, the mold unit comprises a mold body, a through cavity is formed in the mold body, and an upper pressing head and a lower pressing head are installed in the through cavity in a sliding mode. The bottom face of the upper pressing head, the top face of the lower pressing head and the cavity wall of the through cavity define a cavity used for containing powder for pressing, the pressure applying unit is used for pushing the mold unit containing the powder to move upwards so that the mold unit can be clamped between the mold unit and an upper cross beam of the rack, and pressure is continuously applied to the mold unit. The demolding unit comprises a demolding hole formed in the rack; the mold unit composed of the upper pressing head, the lower pressing head and the mold body can serve as a pressing mold and can also serve as a movable container to contain powder, pressing and demolding are achieved in combination with the upper cross beam and the demolding hole of the rack, the overall structure is simple, cost is low, and the requirement for experimental sample preparation is completely met.

Description

Technical Field

[0001] The utility model relates to the technical field of powder molding, in particular to a plastic powder melting and briquetting device. Background Art

[0002] Plastic powder pressing is the process of converting plastic powder solid into molten liquid, and then converting it into blocks after cooling, pressing and compacting.

[0003] The Chinese patent application number CN201720672697.6 discloses a fully automatic powder particle pressing and molding machine, including a base, a lower fixed beam plate is installed above the base, a first hydraulic cylinder is installed on the lower fixed beam plate, a lower punch is installed at the center position of the top surface of the lower fixed beam plate, a die barrel is installed above the lower punch, a push plate is installed on one side of the die barrel, a feeding box is installed on the other side of the die barrel, a second hydraulic cylinder is installed on one side of the feeding box, and an upper punch is provided above the die barrel; when working, the push plate is driven by the second hydraulic cylinder to move freely back and forth to add material into the feeding box. After the filling is completed, the first hydraulic cylinder, the third fast hydraulic cylinder and the fourth boost hydraulic cylinder are started at the same time, and the lower punch and the upper punch simultaneously press the material in the die barrel. After extrusion molding, the product can be ejected vertically by the guidance of the guide column. However, the application structure is complex and the cost is high, and it is not suitable for small-demand scenarios such as experimental sample preparation. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the compression molding machine in the prior art has a complex structure and high cost and is not suitable for small-demand scenarios such as experimental sample preparation, a plastic powder melting and briquetting device is now provided.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a plastic powder melting and briquetting device, comprising:

[0006] frame;

[0007] The mold unit comprises a mold body of a cylindrical structure, wherein a through cavity is formed inside the mold body and an upper punch and a lower punch are slidably mounted in the through cavity along the axial direction thereof, wherein the bottom surface of the upper punch, the top surface of the lower punch and the wall of the through cavity enclose a cavity for accommodating powder for pressing;

[0008] a pressure unit, configured to push the mold unit containing the powder upward to clamp the mold unit between the mold unit and the upper crossbeam of the frame, and continuously apply pressure to the mold unit to press the powder in the mold cavity into shape;

[0009] and a demoulding unit, which includes a demoulding hole arranged on the frame, wherein the demoulding hole allows the pressed finished product to pass through but prohibits the mold body from passing through.

[0010] Furthermore, the axial extension length of the lower ram is smaller than the axial extension length of the mold body, and the axial extension length of the upper ram is not smaller than the axial extension length of the mold body.

[0011] Furthermore, the cross-sectional area of ​​the demoulding hole is larger than the cross-sectional area of ​​the cavity and smaller than the outer cross-sectional area of ​​the mold body.

[0012] Furthermore, a carrier is installed at the output end of the pressure unit, a slot for inserting the mold body is provided inside the carrier, and a handle is provided on the outer peripheral wall of the carrier.

[0013] Furthermore, the bottom end of the lower pressure head protrudes along its radial direction to form a lower limit portion, and the top end of the upper pressure head protrudes along its radial direction to form an upper limit portion.

[0014] Furthermore, the pressure-applying unit is a jack or a hydraulic press, and a pressure gauge is installed thereon.

[0015] Furthermore, the frame includes a lower crossbeam for supporting the pressure unit, the upper crossbeam and a plurality of pillars supported therebetween.

[0016] Furthermore, the frame mold body, the upper pressing block and the lower pressing block are all made of steel.

[0017] The beneficial effects of the utility model are as follows: the mold unit composed of the upper pressure head, the lower pressure head and the mold body of the utility model can not only be used as a pressing mold, but also as a movable container to hold powder, and is combined with the upper crossbeam and the demoulding hole of the frame to realize pressing and demoulding. The overall structure is simple and the cost is low, which fully meets the requirements of experimental sample preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0020] Figure 2 It is a three-dimensional schematic diagram of the mold unit;

[0021] Figure 3 This is a cross-sectional view of the mold unit. Figure 1 ;

[0022] Figure 4 This is a cross-sectional view of the mold unit. Figure 2 ;

[0023] In the picture:

[0024] 1. Frame; 101. Upper beam; 102. Lower beam; 103. Support; 104. Demolding hole;

[0025] 2. Mold unit; 201. Mold body; 202. Upper pressure head; 2021. Upper limit portion; 203. Lower pressure head; 2031. Lower limit portion; 204. Cavity;

[0026] 3. Pressure unit; 301. Pressure gauge;

[0027] 4. Carrier; 401. Slot; 402. Handle. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention only in a schematic manner. Therefore, they only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) may be used solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0029] like Figure 1-Figure 3 As shown, a plastic powder melting and briquetting device comprises:

[0030] Rack 1;

[0031] The mold unit 2 includes a cylindrical mold body 201. The mold body 201 has an axially extending through cavity formed therein. An upper punch 202 and a lower punch 203 are axially mounted in the cavity. The upper punch 202 and the lower punch 203 are coaxially arranged. The bottom surface of the upper punch 202, the top surface of the lower punch 203, and the cavity wall enclose a cavity 204 for accommodating powder for pressing.

[0032] The pressure unit 3 is used to push the mold unit 2 containing the powder upward to clamp the mold unit 2 between the pressure unit 3 and the upper crossbeam 101 of the frame 1, and continuously apply pressure to the mold unit 2 to press the powder in the mold cavity 204 into shape;

[0033] And a demoulding unit, which includes a demoulding hole 104 set on the frame 1, and the demoulding hole 104 allows the pressed finished product to pass through but prohibits the mold body 201 from passing through.

[0034] First, place the lower pressing head 203 into the cavity of the mold body 201, weigh a certain amount of plastic powder and pour it into the cavity, then insert the upper pressing head 202 into the cavity from top to bottom to confine the plastic powder in the cavity 204 to form the mold unit 2. Figure 2 and Figure 3As shown. The upright mold unit 2 is placed in a high-temperature heating furnace chamber at a set temperature to heat the plastic powder into a molten state. After heating is completed, wear heat-resistant gloves to remove the mold unit 2 and place it on top of the pressure unit 3. The pressure unit 3 drives the mold unit 2 up until it contacts the upper crossbeam 101 and continues to apply pressure. At this time, the upper pressure head 202 gradually moves downward under the action of the upper crossbeam 101 to press. During the pressing process, cold water is sprayed around the mold unit 2 to evenly cool it. After the pressing is completed and cooling is complete, the mold unit 2 is removed and placed vertically on the demoulding hole 104 of the frame 1. A heavy hammer is used to strike the upper pressure head 202 to eject the pressed product in the cavity 204 to obtain a pressed sample. The mold unit 2 composed of the upper pressing head 202, the lower pressing head 203 and the mold body 201 of this device can not only be used as a pressing mold, but also as a movable container to hold powder, and is combined with the upper crossbeam 101 and the demoulding hole 104 of the frame 1 to achieve pressing and demoulding. The overall structure is simple and the cost is low, which fully meets the requirements of experimental sample preparation.

[0035] In some examples, the axial extension length of the lower punch 203 is smaller than the axial extension length of the mold body 201, so that there is space to accommodate powder after the lower punch 203 is installed in the cavity 204. The axial extension length of the upper punch 202 is not smaller than the axial extension length of the mold body 201, so that the pressed finished product can be ejected during demolding. However, the sum of the axial extension lengths of the lower punch 203 and the upper punch 202 should not be too large to avoid the upper punch 202 extending too much from the mold body 201, which may cause instability when the upper beam 101 presses the upper punch 202. Therefore, the axial extension length of the upper punch 202 can be made much larger than the axial extension length of the lower punch 203 to improve the stability of the pressing process.

[0036] In some examples, the cross-sectional area of ​​the demolding hole 104 is larger than the cross-sectional area of ​​the cavity 204 and smaller than the outer cross-sectional area of ​​the mold body 201; the mold unit 2 is placed on the demolding hole 104 of the upper beam 101, and the upper pressure head 202 is struck by external force, so that the upper pressure head 202 moves downward to push the finished product in the cavity 204 downward, ejecting it from the mold body 201, causing it to fall from the demolding hole 104 to achieve demolding.

[0037] In some examples, such as Figure 1 As shown, the output end of the pressure unit 3 is detachably mounted with a carrier 4, and a slot 401 is provided inside the carrier 4 for inserting the mold body 201. During pressing, the mold unit 2 filled with molten powder is inserted into the slot 401 of the carrier 4 for positioning. A handle 402 is provided on the outer wall of the carrier 4 to facilitate the installation and disassembly of the carrier 4.

[0038] In some examples, such as Figure 4As shown, the bottom end of the lower press head 203 protrudes along its radial direction to form a lower limit portion 2031, and the lower limit portion 2031 abuts against the mold body 201. On the one hand, it can limit the lower press head 203, and on the other hand, it can seal the bottom of the cavity 204. The cross-sectional area of ​​the lower limit portion 2031 is equal to that of the mold body 201, so that the mold unit 2 can be stably placed in the slot 401 of the carrier 4. The top end of the upper press head 202 protrudes along its radial direction to form an upper limit portion 2021, so as to avoid the upper press head 202 from entering the through cavity of the mold unit 2 and being more troublesome to take out.

[0039] In some examples, the pressure unit 3 is a jack or a hydraulic press, and a pressure gauge 301 is installed thereon to display the pressing pressure.

[0040] In some examples, such as Figure 1 As shown, the frame 1 includes a lower beam 102 for supporting the pressure unit 3 , the upper beam 101 and a plurality of pillars 103 supported therebetween, and a demoulding hole 104 is provided on the upper beam 101 .

[0041] In some examples, the mold body 201 , the upper punch 202 , and the lower punch 203 are all made of steel to have sufficient strength to meet high temperature and pressure requirements.

[0042] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A plastic powder melting and briquetting device, characterized in that: include: Rack (1); The mold unit (2) comprises a mold body (201) of a cylindrical structure, wherein a through cavity is formed inside the mold body (201) and axially penetrates the mold body, an upper pressing head (202) and a lower pressing head (203) are axially slidably mounted in the through cavity, and a mold cavity (204) for accommodating powder is formed between the bottom surface of the upper pressing head (202), the top surface of the lower pressing head (203) and the wall of the through cavity; A pressure unit (3) is used to push the mold unit (2) containing powder upward to clamp the mold unit (2) between the mold unit (2) and the upper crossbeam (101) of the frame (1), and continuously apply pressure to the mold unit (2) to press the powder in the mold cavity (204) into shape; and a demoulding unit, which comprises a demoulding hole (104) arranged on the frame (1), wherein the demoulding hole (104) allows the pressed finished product to pass through but prohibits the mold body (201) from passing through.

2. A plastic powder melting and briquetting device according to claim 1, characterized in that: The axial extension length of the lower pressing head (203) is smaller than the axial extension length of the mold body (201), and the axial extension length of the upper pressing head (202) is not smaller than the axial extension length of the mold body (201).

3. The plastic powder melting and briquetting device according to claim 1, characterized in that: The cross-sectional area of ​​the demoulding hole (104) is larger than the cross-sectional area of ​​the cavity (204) and smaller than the outer cross-sectional area of ​​the mold body (201).

4. The plastic powder melting and briquetting device according to claim 1, characterized in that: The output end of the pressure unit (3) is provided with a carrier (4), a slot (401) for inserting the mold body (201) is provided inside the carrier (4), and a handle (402) is provided on the outer peripheral wall of the carrier (4).

5. The plastic powder melting and briquetting device according to claim 1, characterized in that: The bottom end of the lower pressing head (203) protrudes along its radial direction to form a lower limit portion, and the top end of the upper pressing head (202) protrudes along its radial direction to form an upper limit portion.

6. The plastic powder melting and briquetting device according to claim 1, characterized in that: The pressure applying unit (3) is a jack or a hydraulic press, and a pressure gauge (301) is installed on it.

7. The plastic powder melting and briquetting device according to claim 1, characterized in that: The frame (1) comprises a lower crossbeam (102) for carrying the pressure unit (3), the upper crossbeam (101) and a plurality of pillars (103) supported between the lower crossbeam and the upper crossbeam.

8. The plastic powder melting and briquetting device according to claim 1, characterized in that: The mold body (201), the upper pressing head (202) and the lower pressing head (203) are all made of steel.

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