High-density polyethylene (HDPE) pipe compression molding die

Abstract

The utility model provides an HDPE (high-density polyethylene) pipe compression molding die, which relates to the technical field of compression molding dies and comprises a base, and support plates are fixedly connected to two sides of the top of the base. The cooling machine is started through the external controller, cooling liquid with high temperature in the cooling tank is pumped out by the cooling machine through the input hose and flows into the cooling machine, and after the cooling liquid is cooled in the cooling machine, the cooling liquid is conveyed into the cooling tank again through the output hose to absorb heat and circulate, so that forming and solidification of the HDPE pipe are accelerated, and the production efficiency of the HDPE pipe is improved. The compression molding efficiency is improved; after the HDPE pipe is formed and solidified, the electric air cylinder is started through the external controller to contract and drive the pressing mold to move, the bidirectional motor is started through the external controller, the lead screw rotates along with the bidirectional motor, the push plate in threaded connection with the lead screw moves upwards, the extruded and formed HDPE pipe moves upwards, and demolding is completed. And the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compression molding dies, in particular to a compression molding die for HDPE pipes. Background Art

[0002] Compression molding (also known as press molding or compression molding) is the process of first placing powdered, granular or fibrous plastics into a mold cavity at molding temperature, and then closing the mold and pressurizing it to form and solidify it. Compression molding can be used for thermosetting plastics, thermoplastics and rubber materials, and has the advantages of small loss of raw materials, relatively stable mechanical properties, batch production, and relatively low prices. Polyetheretherketone (PEEK) is a new type of special engineering plastic with extremely excellent physical and mechanical properties. It can replace traditional materials such as metals and ceramics in many special fields, becoming one of the most popular high-performance engineering plastics today. PEEK has outstanding high temperature resistance and can be used for a long time at 260°C, and its instantaneous operating temperature can reach 315°C. It has high rigidity, high dimensional stability, and a small linear expansion coefficient. PEEK has good chemical stability and has strong corrosion resistance to almost all organic solvents such as acids and alkalis. It also has flame retardant and radiation resistance properties. PEEK has excellent resistance to sliding wear and fretting wear. PEEK is a special thermoplastic plastic. In production, different molding methods are used according to the needs of different customers. Common ones include injection molding, extrusion, and compression molding.

[0003] However, in the prior art, when using HDPE pipe compression molding dies to compression mold HDPE pipe raw materials, it is found that when the HDPE pipe compression molding dies cool the molten HDPE pipe, natural cooling is generally used, which leads to slow cooling and low compression molding efficiency; at the same time, some HDPE pipe compression molding dies require workers to manually demould, which increases the labor intensity of workers. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a HDPE pipe compression molding die, comprising: a base, support plates are fixedly connected to both sides of the top of the base, L-shaped support arms are fixedly connected to both sides of the top of the base, motor plates are fixedly connected to the tops of the two L-shaped support arms, bearing holes 1 are penetrated through the tops of the two L-shaped support arms, bearing holes 2 are opened on both sides of the top of the base, auxiliary demoulding components are arranged inside the two bearing holes 1 and the two bearing holes 2, and cooling components are arranged on one side of the two support plates.

[0006] As a preferred embodiment, two electric cylinders are fixedly connected to one side of the two support plates, and the four electric cylinders are grouped in pairs. The other ends of the two groups of electric cylinders are fixedly connected to a die, and a feed port is fixedly embedded in the top of the two dies. Cooling grooves are provided inside the two dies, and the top of the base is fixedly connected to an inner wall, and a plurality of heating rods are fixedly embedded inside the inner wall.

[0007] As a preferred embodiment, the auxiliary demolding assembly includes two screw rods, one end of each of the screw rods is connected to a bidirectional motor, the output ends of the two bidirectional motors are fixedly embedded in the center of one end of the two screw rods, and the surface threaded sleeves of the two screw rods are provided with push plates.

[0008] As a preferred embodiment, the cooling assembly includes a cooling machine, an input end of the cooling machine is fixedly connected to an input hose, and an output end of the cooling machine is fixedly connected to an output hose.

[0009] As a preferred embodiment, the two ends of the two screw rods are embedded in the two bearing holes one and the two bearing holes two through bearings, one side of the two bidirectional motors is fixedly connected to the surface of the two motor plates, and the internal movable sleeve of the push plate is arranged on the surface of the inner wall.

[0010] As a preferred embodiment, the surface of one end of the two input hoses is fixedly embedded in the interior of one end of the two cooling grooves, the surface of one end of the two output hoses is fixedly embedded in the interior of the other end of the two cooling grooves, the surfaces of the two input hoses and the two output hoses are embedded in the interior of the two support plates, and one side of the two coolers is fixedly connected to the surface of the two support plates.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] 1. The utility model connects the mold with an external power supply device, which provides power to the electric cylinder, the bidirectional motor, the heating rod and the cooling machine. The external controller is electrically connected to the electric cylinder, the bidirectional motor, the heating rod and the cooling machine and is controlled in association. In the initial state, the top and bottom of the two die are close to the two sides of the top and bottom of the support plate, so that the two die and the inner wall form a cavity for injecting raw materials. The push plate is movably sleeved on the bottom surface of the inner wall. The raw materials for making HDPE pipes by workers are put into the cavity from the feed inlet, and the external power supply device is controlled by the external controller to supply power to the heating rod. The heating rod heats the raw materials inside the cavity and melts them. When the appropriate time comes, the external power supply device is stopped from supplying power to the heating rod. The cooling machine is started by the external controller. The cooling machine draws out the coolant with a higher temperature in the cooling tank through the input hose and flows into the cooling machine. After the cooling of the interior of the cooling machine, the coolant is re-delivered to the interior of the cooling tank by the output hose to absorb heat and repeat the cycle. This design accelerates the forming and solidification of the HDPE pipe and improves the efficiency of the die forming.

[0013] 2. In the utility model, after the HDPE pipe is formed and solidified, the electric cylinder is started to contract through the external controller to drive the die to move, and then the bidirectional motor is started through the external controller. The screw follows the rotation of the bidirectional motor to make the push plate threadedly connected with the screw move upward, and the extruded HDPE pipe is formed and moves upward to complete demoulding. This design avoids manual demoulding and reduces the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An overview schematic diagram of a HDPE pipe compression molding die provided by the utility model;

[0015] Figure 2 A side plan view of a HDPE pipe compression molding die provided by the utility model;

[0016] Figure 3 A side sectional view of a HDPE pipe compression molding die provided by the utility model;

[0017] Figure 4 The utility model provides a perspective view of a compression mold of a HDPE pipe compression molding die.

[0018] Legend:

[0019] 1. Base; 101. Support plate; 102. L-shaped support arm; 103. Bearing hole one; 104. Bearing hole two; 105. Motor plate; 106. Electric cylinder; 107. Pressing die; 108. Feeding port; 109. Cooling trough; 110. Inner wall; 111. Heating rod; 2. Auxiliary demoulding assembly; 201. Screw rod; 202. Bidirectional motor; 203. Push plate; 3. Cooling assembly; 301. Cooling machine; 302. Input hose; 303. Output hose. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-4 The utility model provides a technical solution: a HDPE pipe compression molding die, comprising: a base 1, support plates 101 are fixedly connected to both sides of the top of the base 1, L-shaped support arms 102 are fixedly connected to both sides of the top of the base 1, motor plates 105 are fixedly connected to the tops of the two L-shaped support arms 102, bearing holes 103 are penetrated through the tops of the two L-shaped support arms 102, bearing holes 104 are opened on both sides of the top of the base 1, auxiliary demoulding components 2 are arranged inside the two bearing holes 103 and the two bearing holes 104, and cooling components 3 are arranged on one side of the two support plates 101.

[0022] Specifically: the cooling machine 301 is started by an external controller, and the cooling machine 301 draws the coolant with a higher temperature in the cooling tank 109 through the input hose 302 and flows into the cooling machine 301. After the interior of the cooling machine 301 is cooled down, the coolant is transported to the interior of the cooling tank 109 again by the output hose 303, absorbs heat, and circulates repeatedly. This design accelerates the forming and solidification of the HDPE pipe and improves the efficiency of the die forming. After the HDPE pipe is formed and solidified, the electric cylinder 106 is started to contract by the external controller to drive the die 107 to move, and the bidirectional motor 202 is started by the external controller. The screw 201 rotates with the bidirectional motor 202, so that the push plate 203 threadedly connected to the screw 201 moves upward, and the extruded HDPE pipe moves upward to complete the demolding. This design avoids manual demolding and reduces the labor intensity of workers.

[0023] In one embodiment, two electric cylinders 106 are fixedly connected to one side of the two support plates 101, and four electric cylinders 106 are grouped in pairs. The other ends of the two groups of electric cylinders 106 are fixedly connected to a die 107, and a feed port 108 is fixedly embedded on the top of the two die dies 107. Cooling grooves 109 are opened inside the two die dies 107. The top of the base 1 is fixedly connected to an inner wall 110, and a plurality of heating rods 111 are fixedly embedded inside the inner wall 110.

[0024] Specifically: in the initial state, the top and bottom of the two dies 107 are in close contact with the top and bottom sides of the support plate 101, so that the two dies 107 and the inner wall 110 form a cavity for injecting raw materials. Workers put the raw materials for making HDPE pipes into the cavity from the feed port 108, and control the external power supply equipment through the external controller to supply power to the heating rod 111. The heating rod 111 is heated to melt the raw materials inside the cavity.

[0025] In one embodiment, the auxiliary demolding assembly 2 includes two screw rods 201, one end of each screw rod 201 is connected to a bidirectional motor 202, the output ends of the two bidirectional motors 202 are fixedly embedded in the center of one end of the two screw rods 201, and the surface threads of the two screw rods 201 are provided with a push plate 203.

[0026] Specifically: after the HDPE pipe is formed and solidified, the electric cylinder 106 is started to contract through the external controller, driving the die 107 to move, and then the bidirectional motor 202 is started through the external controller. The screw rod 201 rotates following the bidirectional motor 202, so that the push plate 203 threadedly connected to the screw rod 201 moves upward, and the extruded HDPE pipe is formed and moves upward to complete demoulding. This design avoids manual demoulding and reduces the labor intensity of workers.

[0027] In one embodiment, the cooling assembly 3 includes a cooling machine 301 , an input end of the cooling machine 301 is fixedly connected to an input hose 302 , and an output end of the cooling machine 301 is fixedly connected to an output hose 303 .

[0028] Specifically: the cooler 301 is started by an external controller, and the cooler 301 draws the coolant with a higher temperature in the cooling tank 109 through the input hose 302 and flows into the cooler 301. After the cooler 301 is cooled down inside, the coolant is transported to the inside of the cooling tank 109 again by the output hose 303, absorbs heat, and the cycle repeats. This design accelerates the forming and solidification of the HDPE pipe and improves the efficiency of the compression molding. The cooler 301 is an existing cooling technology, and the specific structure is not repeated here.

[0029] In one embodiment, the two ends of the two screw rods 201 are embedded in the two bearing holes 103 and the two bearing holes 104 through bearings, one side of the two bidirectional motors 202 is fixedly connected to the surface of the two motor plates 105, and the internal movable sleeve of the output push plate 203 is arranged on the surface of the inner wall 110.

[0030] Specifically, the upward movement of the output hose 303 can push the HDPE pipe sleeved on the surface of the support plate 101 and solidified to move upward, thereby avoiding manual demoulding and reducing the labor intensity of workers.

[0031] In one embodiment, the surface of one end of the two input hoses 302 is fixedly embedded in the interior of one end of the two cooling grooves 109, the surface of one end of the two output hoses 303 is fixedly embedded in the interior of the other end of the two cooling grooves 109, the surfaces of the two input hoses 302 and the two output hoses 303 are embedded in the interior of the two support plates 101, and one side of the two coolers 301 is fixedly connected to the surface of the two support plates 101.

[0032] Specifically, the cooling machine 301 is fixedly connected to the support plate 101 to prevent the cooling machine 301 from shaking during operation, thereby preventing the normal use of the mold from being affected.

[0033] Working principle: connect this mold to an external power supply device, the external power supply device provides power to the electric cylinder 106, the bidirectional motor 202, the heating rod 111 and the cooler 301, and the external controller is electrically connected to the electric cylinder 106, the bidirectional motor 202, the heating rod 111 and the cooler 301 and controls them in association; in the initial state, the top and bottom of the two dies 107 are close to the top and bottom sides of the support plate 101, so that the two dies 107 and the inner wall 110 form a cavity for injecting raw materials, and the push plate 203 is movably sleeved on the bottom surface of the inner wall 110. The worker puts the raw materials for making HDPE pipes into the cavity from the feed port 108, and controls the external power supply device to supply power to the heating rod 111 through the external controller. The heating rod 111 heats the raw materials inside the cavity and melts them. When the appropriate time comes, stop the external power supply device from supplying power to the heating rod 111. The cooling machine 301 is started by an external controller, and the cooling machine 301 draws the coolant with a higher temperature in the cooling tank 109 through the input hose 302 and flows into the cooling machine 301. After the interior of the cooling machine 301 is cooled down, the coolant is transported back to the interior of the cooling tank 109 by the output hose 303 to absorb heat and repeat the cycle. This design accelerates the forming and solidification of the HDPE pipe and improves the efficiency of the die forming. After the HDPE pipe is formed and solidified, the electric cylinder 106 is started to contract by the external controller to drive the die 107 to move, and then the bidirectional motor 202 is started by the external controller, and the screw rod 201 rotates with the bidirectional motor 202, so that the push plate 203 threadedly connected to the screw rod 201 moves upward, and the extruded HDPE pipe moves upward to complete the demoulding. This design avoids manual demoulding and reduces the labor intensity of workers.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A HDPE pipe compression molding die, characterized in that: include: A base (1) is provided, wherein both sides of the top of the base (1) are fixedly connected to support plates (101), both sides of the top of the base (1) are fixedly connected to L-shaped support arms (102), the tops of the two L-shaped support arms (102) are fixedly connected to motor plates (105), the tops of the two L-shaped support arms (102) are both penetrated by a first bearing hole (103), both sides of the top of the base (1) are provided with a second bearing hole (104), auxiliary demoulding components (2) are provided inside the two first bearing holes (103) and the two second bearing holes (104), and a cooling component (3) is provided on one side of the two support plates (101).

2. The HDPE pipe compression molding die according to claim 1, characterized in that: Two electric cylinders (106) are fixedly connected to one side of the two support plates (101), and the four electric cylinders (106) are grouped in pairs. The other ends of the two groups of electric cylinders (106) are fixedly connected to a die (107), and the tops of the two dies (107) are fixedly embedded with a feed port (108). The insides of the two dies (107) are provided with a cooling groove (109). The top of the base (1) is fixedly connected to an inner wall (110), and the inside of the inner wall (110) is fixedly embedded with a plurality of heating rods (111).

3. The HDPE pipe compression molding die according to claim 1, characterized in that: The auxiliary demoulding component (2) comprises two screw rods (201), one end of each of the two screw rods (201) is connected to a bidirectional motor (202), the output ends of the two bidirectional motors (202) are fixedly embedded in the center of one end of the two screw rods (201), and the surfaces of the two screw rods (201) are threadedly sleeved with push plates (203).

4. The HDPE pipe compression molding die according to claim 1, characterized in that: The cooling assembly (3) comprises a cooling machine (301), an input end of the cooling machine (301) is fixedly connected to an input hose (302), and an output end of the cooling machine (301) is fixedly connected to an output hose (303).

5. The HDPE pipe compression molding die according to claim 3, characterized in that: The two ends of the two screw rods (201) are embedded in the two bearing holes (103) and the two bearing holes (104) through bearings, one side of the two bidirectional motors (202) is fixedly connected to the surfaces of the two motor plates (105), and the inner movability of the push plate (203) is sleeved on the surface of the inner wall (110).

6. The HDPE pipe compression molding die according to claim 4, characterized in that: The surfaces of one end of the two input hoses (302) are fixedly embedded in the interior of one end of the two cooling grooves (109), the surfaces of one end of the two output hoses (303) are fixedly embedded in the interior of the other end of the two cooling grooves (109), the surfaces of the two input hoses (302) and the two output hoses (303) are embedded in the interior of the two support plates (101), and one side of the two cooling machines (301) is fixedly connected to the surfaces of the two support plates (101).

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