Injection molding machine heating device

Abstract

The present application relates to the field of injection molding machines, and in particular to a heating device for an injection molding machine, comprising a shell and a heating structure, wherein the shell is sleeved on the outside of a conveying pipe of the injection molding machine, and the heating structure comprises a resistance rod, which is arranged inside the shell, and a sliding sleeve is slidably connected to the resistance rod, and the sliding sleeve is a sliding structure made of a conductive material, and one end of the resistance rod and the sliding structure are respectively connected to two poles of a power supply, thereby achieving the effect of reducing the waste of heat in the heating device of the injection molding machine.

Description

Technical Field

[0001] The present application relates to the field of injection molding machines, and in particular to a heating device for injection molding machines. Background Art

[0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal, and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold cavity.

[0003] The existing injection molding machine can be divided into two parts: one is the power part, and the other is the heating part. The plastic material enters the injection molding machine from the hopper and is transported forward by the rotation of the screw. During the forward movement, the material is heated by the barrel, sheared and compressed by the screw to melt the material, thus achieving the change between the three states of glass state, high elastic state and viscous flow state. Under the condition of pressurization, the material in the viscous flow state passes through a die with a certain shape, and then becomes a continuum with a cross section similar to the die shape according to the die, and then cools and shapes to form a glass state, thereby obtaining the required processed parts.

[0004] The above-mentioned prior art solutions have the following defects: most of the existing heating devices of injection molding machines are fixed and can only perform heating at a fixed temperature and length, and the heating temperature and length cannot be adjusted. When heating some injection molding materials with a lower melting point, excessive heating may cause energy waste. Summary of the invention

[0005] In order to reduce the heat waste of the heating device of the injection molding machine, the present application provides a heating device for the injection molding machine.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A heating device for an injection molding machine comprises a shell and a heating structure. The shell is sleeved on the outside of a conveying pipe of the injection molding machine. The heating structure comprises a resistance rod, which is arranged inside the shell. A sliding sleeve is slidably connected to the resistance rod. The sliding sleeve is a sliding structure made of a conductive material. One end of the resistance rod and the sliding structure are respectively connected to two poles of a power supply.

[0008] By adopting the above scheme, when the melting point of the injection molding material is low, the sliding structure is slid to reduce the resistance of the resistor rod connected to the circuit, thereby reducing the heat generated by the resistor rod. At the same time, the length of the resistor rod that generates heat is reduced, so that the heat generated by the heating device is just enough to melt the injection molding material, thereby avoiding overheating and reducing heat waste in the heating device of the injection molding machine.

[0009] Optionally, the sliding structure includes a sliding sleeve, and the sliding sleeve is arranged on the outside of the resistance rod.

[0010] By adopting the above technical solution, the sliding sleeve is arranged on the outside of the resistance rod, strengthening the connection between the sliding structure and the resistance rod, so that the sliding sleeve can only slide along the resistance rod, thereby preventing the sliding sleeve from falling off the resistance rod and causing device failure.

[0011] Optionally, the heating structure is provided in multiple groups, and the multiple groups of heating structures are arranged in a circular array inside the shell.

[0012] By adopting the above technical solution, the multiple groups of heating structures can make the conveying pipe of the injection molding machine heated more evenly, so that the raw materials in the conveying pipe can be heated more evenly, so that the raw materials can be melted more completely.

[0013] Optionally, a heat-insulating layer for heat preservation is arranged inside the shell, and the heat-insulating layer is sleeved on the outside of the heating structure.

[0014] By adopting the above technical solution, a heat-insulating layer is provided to reduce the loss of heat generated by the heating structure, thereby further reducing the waste of heat in the heating device of the injection molding machine.

[0015] Optionally, a conductive rod is disposed inside the shell, the conductive rod is disposed parallel to the resistance rod, the sliding sleeve is slidably connected to the conductive rod, and one end of the conductive rod and one end of the resistance rod are respectively connected to two poles of a power supply.

[0016] By adopting the above technical solution, the conductive rod is connected to the power supply, thereby preventing the sliding sleeve from being disconnected from the power supply during the movement, thereby preventing the heating device from malfunctioning.

[0017] Optionally, the insulation layer and the circumferential surface of the shell are provided with long sliding rails, the sliding rails are parallel to the resistance rods, the sliding sleeve is connected with an insulating sliding rod, and the sliding rod passes through the sliding rails to reach the outside of the shell.

[0018] By adopting the above technical solution, the sliding sleeve is driven to slide on the resistance rod by toggling the sliding rod, so that the operator can adjust the heating structure conveniently.

[0019] Optionally, soft rubber strips for preventing heat loss are provided on both sides of the slide rail.

[0020] By adopting the above technical solution, the heat generated by the resistance rod and lost in the slide rail is reduced, thereby further reducing the heat waste of the heating device.

[0021] Optionally, a plurality of the sliding rods are connected to the same sliding ring at one outer end.

[0022] By adopting the above technical solution, multiple connecting rods can be slid simultaneously by sliding the sliding ring, thereby driving multiple sliding sleeves to slide on the resistance rods, thereby adjusting multiple heating structures at the same time.

[0023] Optionally, the outer side of the sliding ring is provided with a rubber sleeve for heat insulation.

[0024] By adopting the above technical solution, when the operator slides the sliding ring, the sliding ring is prevented from being overheated and causing burns to the operator.

[0025] In summary, this application has the following technical effects:

[0026] 1. The heat generated by the heating device is adjusted by setting a resistance rod and a sliding structure, thereby reducing the waste of heat generated by overheating of the heating device of the injection molding machine;

[0027] 2. The conductive rod is provided to prevent the sliding sleeve from being disconnected from the power supply during the sliding process;

[0028] 3. The sliding rod is provided to make it more convenient for the operator to adjust the heating structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the overall structure diagram of this application;

[0030] Figure 2 is an overall cross-sectional view of the present application;

[0031] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0032] In the figure, 1, shell; 11, heating chamber; 12, slide rail; 121, rubber strip; 2, heating structure; 21, resistance rod; 22, sliding sleeve; 3, conductive rod; 4, insulation layer; 5, sliding rod; 6, sliding ring; 61, rubber sleeve; 7, conveying pipe; 8, electric wire. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings.

[0034] Reference Figure 2 and Figure 3, a heating device for an injection molding machine, comprising a housing 1 and a heating structure 2, wherein the housing 1 is sleeved on the outside of a delivery pipe 7 of the injection molding machine, and the heating structure 2 is arranged inside the housing 1, and the heating structure 2 comprises a resistance rod 21 and a sliding sleeve 22, wherein the resistance rod 21 is fixed inside the housing 1, and the sliding sleeve 22 is slidably connected to the resistance rod 21, and one end of the resistance rod 21 and the sliding sleeve 22 are respectively connected to two poles of a power source. When the melting point of the injection molding material to be heated is low, the sliding sleeve 22 is slid to reduce the resistance of the resistance rod 21 connected to the circuit, and then the power is turned on to make the resistance of the part of the resistance rod 21 connected to the circuit generate heat, and the heat generated by the resistance heats the delivery pipe 7 of the injection molding machine, thereby reducing the injection molding material in the delivery pipe 7, and since the resistance of the resistance rod 21 connected to the circuit is small, the heat energy generated by the resistance rod 21 is also reduced, thereby reducing the energy waste caused by excessive heating of the raw material.

[0035] refer to Figure 2 and Figure 3 The shell 1 is a cylinder with a circular cross section. The inner wall of the shell 1 is provided with a circular heating chamber 11. A heat preservation layer 4 for heat preservation and heat insulation is fixedly arranged in the heating chamber 11. The material of the heat preservation layer 4 has insulation and heat insulation properties, such as glass fiber or asbestos. A resistance rod 21 is arranged in the heating chamber 11. Both ends of the resistance rod 21 are fixed to both ends of the shell 1. A plurality of resistance rods 21 are arranged in the heating chamber 11. The plurality of resistance rods 21 are distributed in the heating chamber 11 in a circular array. A plurality of resistance rods 21 are arranged in the heating chamber 11. The plurality of resistance rods 21 heat the delivery pipe 7 of the injection molding machine at the same time, so that the heating of the delivery pipe 7 is more uniform, thereby making the injection molding raw materials heated more uniformly.

[0036] refer to Figure 2 and Figure 3 A conductive rod 3 is arranged inside the heating chamber 11. There are multiple conductive rods 3. Each conductive rod 3 is arranged near the resistance rod 21. The conductive rod 3 is parallel to the resistance rod 21. Both ends of the conductive rod 3 are fixed to both ends of the housing 1. The sliding sleeve 22 is slidably connected to the conductive rod 3. One end of the conductive rod 3 and one end of the resistance rod 21 are respectively connected to the two poles of the power supply through the wire 8. When adjusting the heat of the heating device, the sliding sleeve 22 can be moved to slide on the conductive rod 3 and the resistance rod 21, so as to prevent the sliding sleeve 22 from being separated from the electrode of the power supply when sliding on the resistance rod 21, resulting in circuit disconnection, and then causing the heating device to malfunction.

[0037] Reference Figure 1 and Figure 3A plurality of long strip slide rails 12 facing the resistance rod 21 are provided on the circumferential surface of the shell 1 and the insulation layer 4. The slide rails 12 are parallel to the resistance rod 21. The slide rails 12 connect the outer side of the shell 1 with the heating chamber 11. A slide rod 5 is fixedly connected to the slide sleeve 22. The slide rod 5 is insulating. One end of the slide rod 5 is fixedly connected to the slide sleeve 22. The other end of the slide rod 5 passes through the slide rail 12 to reach the outside of the shell 1. A plurality of slide rods 5 are simultaneously fixedly connected to the same slide ring 6 at one end of the outer side of the shell 1. A slide sleeve 22 is provided on the outer side of the slide ring 6 to prevent the operator from being scalded. When the operator adjusts the heating device, he only needs to slide the sliding ring 6 to drive the multiple sliding rods 5 to slide together, thereby driving the multiple sliding sleeves 22 to slide on the resistance rods 21, so as to simultaneously adjust the heat generated by the multiple resistance rods 21, which is convenient for the operator to operate. Soft rubber strips 121 are respectively arranged on both sides of the inner side of the slide rail 12. The rubber strips 121 reduce the outflow of hot air in the heating chamber 11 in the slide rail 12, thereby reducing heat waste and preventing the hot air in the heating chamber 11 from spraying out in the slide rail 12 to cause burns to the operator.

[0038] The specific implementation principle of this embodiment is: when the heating device is used, when the temperature generated by the heating device is greater than the heat required for the injection molding raw material to melt, the excess heat will be wasted. In order to reduce the waste, the injection molding machine is first stopped, and the sliding ring 6 is adjusted so that the sliding ring 6 drives the sliding rod 5 to slide, thereby driving the sliding sleeve 22 to slide on the resistor rod 21, so that the length of the resistor rod 21 connected to the circuit is reduced, thereby reducing the temperature of the resistor rod 21 heating, thereby reducing energy waste, and at the same time, the thermal insulation layer 4 reduces the heat loss, further reducing energy waste. When the temperature generated by the heating device is not enough to melt the injection molding raw material, the sliding rod 5 is adjusted so that the sliding ring 6 drives the sliding rod 5 to slide, thereby driving the sliding sleeve 22 to slide on the resistor rod 21, thereby increasing the length of the resistor rod 21 connected to the circuit, thereby increasing the temperature generated by the heating of the resistor rod 21, and thus enabling the raw material to melt. Compared with the existing injection molding machine heating device, the injection molding machine heating device can change the temperature generated by the heating of the resistor rod 21 by adjusting the position of the sliding sleeve 22 on the resistor rod 21, thereby adjusting the temperature generated by the heating device.

[0039] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A heating device for an injection molding machine, characterized in that: The invention comprises a shell (1) and a heating structure (2), wherein the shell (1) is sleeved on the outside of a conveying pipe (7) of an injection molding machine, and the heating structure (2) comprises a resistance rod (21), which is arranged inside the shell (1), and a sliding sleeve (22) is slidably connected to the resistance rod (21), and the sliding sleeve (22) is a sliding structure made of a conductive material, and one end of the resistance rod (21) and the sliding structure are respectively connected to two poles of a power source.

2. The heating device for an injection molding machine according to claim 1, characterized in that: The sliding structure comprises a sliding sleeve (22), and the sliding sleeve (22) is sleeved on the outside of the resistance rod (21).

3. The heating device for an injection molding machine according to claim 2, characterized in that: The heating structures (2) are provided in multiple groups, and the multiple groups of heating structures (2) are arranged in a circular array inside the housing (1).

4. The heating device for an injection molding machine according to claim 1, characterized in that: A heat-insulating layer (4) for heat preservation is arranged inside the outer shell (1), and the heat-insulating layer (4) is sleeved on the outside of the heating structure (2).

5. The heating device for an injection molding machine according to claim 2, characterized in that: A conductive rod (3) is arranged inside the housing (1), the conductive rod (3) and the resistance rod (21) are arranged in parallel, the sliding sleeve (22) is slidably connected to the conductive rod (3), and one end of the conductive rod (3) and one end of the resistance rod (21) are respectively connected to two poles of a power source.

6. The heating device for an injection molding machine according to claim 4, characterized in that: The insulating layer (4) and the outer shell (1) are provided with a long strip of sliding rails (12) on their circumferential surfaces. The sliding rails (12) are parallel to the resistance rods (21). The sliding sleeve (22) is connected to an insulating sliding rod (5). The sliding rod (5) passes through the sliding rails (12) and reaches the outside of the outer shell (1).

7. The heating device for an injection molding machine according to claim 6, characterized in that: Soft rubber strips (121) for preventing heat loss are arranged on both sides of the slide rail (12).

8. The heating device for an injection molding machine according to claim 6, characterized in that: The plurality of sliding rods (5) are connected to the same sliding ring (6) at one outer end.

9. The heating device for an injection molding machine according to claim 8, characterized in that: The outer side of the sliding ring (6) is provided with a rubber sleeve (61) for heat insulation.

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