A multi-section temperature control heating system for a mold

Abstract

The utility model is suitable for heating equipment technical field provides a kind of mould with multistage temperature control heating system, this system is provided with multistage temperature control heating pipe in mould template side, at least three independent control heating pipes are contained in each multistage temperature control heating pipe, each section is equipped with special heating resistance wire and temperature sensor to realize independent heating control, while the two ends wire of heating resistance wire and temperature sensor in each heating pipe are connected with the independent terminal connection of heating pipe wiring port respectively through the independent passage of different heating hole, temperature sensing hole and wire hole, complete insulation is realized between each workpiece, avoid the mutual interference of each component, reduce equipment failure rate and maintenance cost.

Description

Technical Field

[0001] This utility model applies to the field of heating equipment technology and provides a multi-segment temperature control heating system for molds. Background Technology

[0002] Hot pressing is a common processing method in the plastics industry. It involves molding or solidifying thermoplastic materials into the desired shape under high temperature and pressure. The heating system typically involves adding a heating mechanism to the mold template. The conventional approach is to create a hole in the side of the mold template and insert a heating rod into it to heat the entire template to the required temperature. However, in actual use, because the heating rod usually heats uniformly along the axial direction, its individual heating power is constant at various locations. But the heat dissipation rate of the template varies across different locations during production. Normally, the heat dissipation rate is faster at the outer edges of the template than in the center. Under these circumstances, the uniformly heated heating rod, during prolonged and repeated heating and cooling, can cause temperature deviations at different locations within the template. This makes precise temperature control during mold production impossible, resulting in poor product molding quality. Furthermore, in many processing scenarios, more precise temperature control of the mold is desired, which traditional heating rods cannot achieve. Utility Model Content

[0003] Therefore, this utility model provides a multi-segment temperature control heating system for molds. Several multi-segment temperature control heating tubes are inserted into the side of the mold template to realize the heating function of the mold template. Each multi-segment temperature control heating tube is equipped with multiple heating tubes, and each heating tube is equipped with an independent heating resistance wire and a temperature sensor. This allows the multi-segment temperature control heating tube to achieve different heating powers in multiple segments along the axial direction, thus realizing independent temperature control function for multiple positions of the template.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-segment temperature-controlled heating system for molds, comprising a mold template, wherein several heating tube mounting holes are opened from top to bottom on the side of the mold template, and a multi-segment temperature-controlled heating tube is inserted into each heating tube mounting hole. The multi-segment temperature-controlled heating tube includes a mounting tube body, and a heating tube wiring port is fixedly provided on the side of the mounting tube body near the opening of the heating tube mounting hole. At least three heating tubes are sequentially arranged inside the mounting tube body, and each heating tube is provided with a heating resistance wire and a temperature sensor. Several wiring terminals are provided in the heating tube wiring port, and the heating resistance wire and temperature sensor in each heating tube are electrically connected to the wiring terminals in the heating tube wiring port.

[0005] Furthermore, there are three heating tubes, which are sequentially named heating tube A, heating tube B, and heating tube C, starting from the side of the heating tube mounting hole closest to the heating tube wiring port. The heating resistance wire and temperature sensor installed in heating tube A are respectively named heating resistance wire A and temperature sensor A. The heating resistance wire and temperature sensor installed in heating tube B are respectively named heating resistance wire B and temperature sensor B. The heating resistance wire and temperature sensor installed in heating tube C are respectively named heating resistance wire C and temperature sensor C. The wiring terminals in the heating tube wiring port are respectively: heating positive terminal A, heating negative terminal A, temperature sensing positive terminal A, temperature sensing negative terminal A, heating positive terminal B, heating negative terminal B, temperature sensing positive terminal B, temperature sensing negative terminal B, and heating tube C. The heating element consists of a C-section heating positive terminal, a C-section heating negative terminal, a C-section temperature sensing positive terminal, and a C-section temperature sensing negative terminal. The two ends of the A-section heating resistance wire are connected to the A-section heating positive terminal and the A-section heating negative terminal, respectively. The two ends of the A-section temperature sensor are connected to the A-section temperature sensing positive terminal and the A-section temperature sensing negative terminal, respectively. The two ends of the B-section heating resistance wire pass through the A-section heating tube and are connected to the B-section heating positive terminal and the B-section heating negative terminal, respectively. The two ends of the B-section temperature sensor pass through the A-section heating tube and are connected to the B-section temperature sensing positive terminal and the B-section temperature sensing negative terminal, respectively. The two ends of the C-section heating resistance wire pass through the B-section heating tube and the A-section heating tube, respectively, and are connected to the C-section heating positive terminal and the C-section temperature sensing negative terminal, respectively.

[0006] Furthermore, the A-segment heating tube has two A-segment heating holes, two A-segment temperature sensing holes, and eight A-segment wire holes extending axially; the B-segment heating tube has two B-segment heating holes, two B-segment temperature sensing holes, and four B-segment wire holes extending axially; and the C-segment heating tube has two C-segment heating holes and two C-segment temperature sensing holes extending axially. The A-segment heating resistance wire, B-segment heating resistance wire, and C-segment heating resistance wire all have a "U"-shaped structure. The A-segment heating resistance wire is installed in the two A-segment heating holes, and the wires at both ends of the A-segment heating resistance wire are led out from the openings of the two A-segment heating holes and connected to the positive and negative terminals of the A-segment heating resistance wire, respectively. The A-segment temperature sensor is installed in the two A-segment temperature sensing holes, and the wires at both ends of the A-segment temperature sensor are led out from the openings of the two A-segment temperature sensing holes and connected to the positive and negative terminals of the A-segment temperature sensing resistance wire, respectively. The B-segment heating resistance wire is installed in the two B-segment heating holes, and the wires at both ends of the B-segment heating resistance wire... The wires are led out from the openings of the two B-segment heating holes and pass through the two A-segment wire holes, respectively, and are connected to the positive and negative terminals of the B-segment heating. The B-segment temperature sensor is installed in the two B-segment temperature sensing holes. The wires at both ends of the B-segment temperature sensor are led out from the openings of the two B-segment temperature sensing holes and pass through the two A-segment wire holes, respectively, and are connected to the positive and negative terminals of the B-segment temperature sensing. The C-segment heating resistance wire is installed in the two C-segment heating holes. The wires at both ends of the C-segment heating resistance wire are led out from the openings of the two C-segment heating holes and pass through the two B-segment wire holes and the two A-segment wire holes, respectively, and are connected to the positive and negative terminals of the C-segment heating. The C-segment temperature sensor is installed in the two C-segment temperature sensing holes. The wires at both ends of the C-segment temperature sensor are led out from the openings of the two C-segment temperature sensing holes and pass through the two B-segment wire holes and the two A-segment wire holes, respectively, and are connected to the positive and negative terminals of the C-segment temperature sensing.

[0007] Furthermore, the two C-segment heating holes and the two C-segment temperature sensing holes are coaxially arranged in a one-to-one correspondence with the four B-segment wire holes, and the two C-segment heating holes and the two C-segment temperature sensing holes are also coaxially arranged in a one-to-one correspondence with the four A-segment wire holes, and the two B-segment heating holes and the two B-segment temperature sensing holes are coaxially arranged in a one-to-one correspondence with the four A-segment wire holes.

[0008] Furthermore, an insulating heat insulation plate is provided between the heating tube in section A and the wiring port of the heating tube.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. In the solution of this utility model, multiple heating tubes are sequentially arranged in a multi-segment temperature-controlled heating tube. Each heating tube achieves independent heating control through an independently set heating resistance wire and a temperature sensor. In this way, the same heating tube can achieve different heating power at multiple positions. In view of the problem that the outer part of the hot pressing mold template dissipates heat faster than the middle part during the production process, different heating strategies are set for each area to achieve consistent temperature in each area. For example, after reaching the predetermined temperature, the heating tubes at both ends, A and C, continuously heat the mold template to ensure that the outer part of the mold template has the same temperature as the middle part. This solves the problem that the outer part of the mold template cools down faster than the middle part. On the other hand, it can also achieve more precise temperature control in each area and flexibly adjust the temperature of each area according to some special production needs.

[0011] 2. The power supply and control wires of the heating resistors and temperature sensors of multiple heating elements are all run to the heating element wiring port. An integrated interface is used to achieve a unified connection, making the structure simpler. At the same time, the heating resistors and temperature sensors of the rear heating elements are routed separately through multiple wire holes set in the front heating element. The heating resistors and temperature sensors of multiple heating elements are isolated from each other, reducing the probability of interference and short circuits. This also better protects each component, preventing the failure of a single component from affecting other components, and also reduces maintenance costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a multi-segment temperature control heating system for molds mentioned in this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the multi-segment temperature-controlled heating tube mentioned in this utility model;

[0014] Figure 3 for Figure 2 A schematic diagram of the structure of the multi-segment temperature-controlled heating tube after removing the mounting tube body;

[0015] Figure 4 for Figure 2 A disassembly diagram of the multi-segment temperature-controlled heating element mentioned in the text;

[0016] Figure 5 for Figure 2 The front view of the multi-segment temperature-controlled heating element mentioned in the text;

[0017] Figure 6 for Figure 5 A cross-sectional view of the multi-segment temperature-controlled heating element in the DD direction;

[0018] Figure 7 for Figure 5 A cross-sectional view of the multi-segment temperature-controlled heating element in the EE direction;

[0019] Figure 8 for Figure 5 A cross-sectional view of the multi-segment temperature-controlled heating element in the FF direction;

[0020] Figure 9 This is a schematic diagram of the structure of the heating tube in section A mentioned in this utility model;

[0021] Figure 10 This is a schematic diagram of the structure of the heating tube in section B mentioned in this utility model;

[0022] Figure 11 This is a schematic diagram of the structure of the C-segment heating tube mentioned in this utility model.

[0023] In the picture:

[0024] 100. Mold templates;

[0025] 200. Multi-segment temperature-controlled heating element; 210. Mounting tube body; 220. Heating element wiring port; 230. Segment A heating element; 231. Segment A heating resistance wire; 232. Segment A temperature sensor; 240. Segment B heating element; 241. Segment B heating resistance wire; 242. Segment B temperature sensor; 250. Segment C heating element; 251. Segment C heating resistance wire; 252. Segment C temperature sensor; 260. Insulating heat insulation board. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] Example, see attached document Figure 1 The present invention provides a multi-segment temperature-controlled heating system for molds, including a mold template 100. Several heating tube mounting holes are formed on the side of the mold template 100 from top to bottom. A multi-segment temperature-controlled heating tube 200 is inserted into each heating tube mounting hole, as shown in the attached figure. Figure 2 ~Appendix Figure 4As shown, the multi-segment temperature-controlled heating tube 200 includes a mounting tube body 210. The mounting tube body 210 is made of a wear-resistant, pressure-resistant, and thermally conductive metal tube, such as copper alloy or stainless steel. A heating tube wiring port 220 is fixedly provided on the side of the mounting tube body 210 near the heating tube mounting hole. At least three heating tubes are arranged sequentially inside the mounting tube body 210. The heating tubes are made of magnesium oxide tubes commonly used in the heating rod industry. Each heating tube is equipped with a heating resistance wire and a temperature sensor. The heating resistance wire and temperature sensor are conventional equipment types used in the prior art. Several wiring terminals are provided inside the heating tube wiring port 220. The heating resistance wire and temperature sensor in each heating tube are electrically connected to the wiring terminals in the heating tube wiring port 220. Since the temperature difference of the mold template 100 in the actual production process of the mold mainly comes from the difference in heat dissipation rate at different locations, and the temperature requirement of the middle position of the mold template 100 is different from that of the two sides as it is the main processing area, the heating of the middle and the two sides of the mold needs to be carried out independently. Therefore, in this embodiment, as shown in the attached... Figure 3 Appendix Figure 4 As shown, the preferred number of heating tubes is three. Starting from the side of the heating tube mounting hole closest to the heating tube wiring port 220, they are sequentially named heating tube A 230, heating tube B 240, and heating tube C 250. Heating tubes A 230, B 240, and C 250 are respectively used for heating control of the left, middle, and right parts of the mold template 100, as shown in the attached diagram. Figure 5 ~Appendix Figure 8 As shown, the heating resistance wire and temperature sensor installed in section A heating tube 230 are respectively referred to as section A heating resistance wire 231 and section A temperature sensor 232; the heating resistance wire and temperature sensor installed in section B heating tube 240 are respectively referred to as section B heating resistance wire 241 and section B temperature sensor 242; the heating resistance wire and temperature sensor installed in section C heating tube 250 are respectively referred to as section C heating resistance wire 251 and section C temperature sensor 252. Section A heating resistance wire 231, section B heating resistance wire 241, and section C heating resistance wire 252... To increase the heating area, the resistance heating wire 251 is U-shaped. The terminals inside the heating tube wiring port 220 are respectively: section A heating positive terminal, section A heating negative terminal, section A temperature sensing positive terminal, section A temperature sensing negative terminal, section B heating positive terminal, section B heating negative terminal, section B temperature sensing positive terminal, section B temperature sensing negative terminal, section C heating positive terminal, section C heating negative terminal, section C temperature sensing positive terminal, and section C temperature sensing negative terminal. These terminals are individually arranged, corresponding to the heating tube's structural design, as shown in the attached diagram. Figure 9 As shown, two section A heating holes, two section A temperature sensing holes, and eight section A wire holes are axially arranged through section A heating tube 230, as shown in the attached diagram. Figure 10As shown, section B heating tube 240 is axially perforated with two section B heating holes, two section B temperature sensing holes, and four section B wire holes, as shown in the attached diagram. Figure 11 As shown, the C-section heating tube 250 has two C-section heating holes and two C-section temperature sensing holes arranged axially. Simultaneously, the two C-section heating holes and two C-section temperature sensing holes are coaxially aligned with four B-section wire holes, and also coaxially aligned with four A-section wire holes. Similarly, the two B-section heating holes and two B-section temperature sensing holes are coaxially aligned with four A-section wire holes. After the components are assembled, twelve pathways will be formed: two pathways from C-section heating holes to B-section wire holes to A-section wire holes, and two C-section heating holes to B-section wire holes. The twelve pathways are as follows: A temperature sensing hole → B-segment wire hole → A-segment wire hole; two B-segment heating holes → A-segment wire hole; two B-segment temperature sensing holes → A-segment wire hole; two A-segment heating holes; and two A-segment temperature sensing holes. The two A-segment heating holes, the two B-segment heating holes, and the two C-segment heating holes are interconnected via openings or end slots. Similarly, the two A-segment wire holes, the two B-segment wire holes, and the two C-segment wire holes are also interconnected via openings or end slots. The internal design of these twelve pathways is as follows:

[0028] The heating resistance wire 231 of section A is installed in two section A heating holes. The wires at both ends of the heating resistance wire 231 are led out from the openings of the two section A heating holes and connected to the positive and negative terminals of section A heating, respectively. The temperature sensor 232 of section A is installed in two section A temperature sensing holes. The sensing unit of the temperature sensor 232 of section A can be set at any position in the two section A temperature sensing holes as needed. The temperature sensor 242 of section B and the temperature sensor 252 of section C mentioned below are designed in the same way. The wires at both ends of the temperature sensor 232 of section A are led out from the openings of the two section A temperature sensing holes and connected to the positive and negative terminals of section A temperature sensing, respectively.

[0029] The B-segment heating resistance wire 241 is installed in two B-segment heating holes. The wires at both ends of the B-segment heating resistance wire 241 are led out from the openings of the two B-segment heating holes and pass through the two A-segment wire holes respectively, and are then connected to the positive and negative terminals of the B-segment heating. The B-segment temperature sensor 242 is installed in two B-segment temperature sensing holes. The wires at both ends of the B-segment temperature sensor 242 are led out from the openings of the two B-segment temperature sensing holes and pass through the two A-segment wire holes respectively, and are then connected to the positive and negative terminals of the B-segment temperature sensing.

[0030] The C-segment heating resistance wire 251 is installed in two C-segment heating holes. The wires at both ends of the C-segment heating resistance wire 251 are led out from the openings of the two C-segment heating holes and pass through the two B-segment wire holes and the two A-segment wire holes in sequence, respectively, and are then connected to the positive and negative terminals of the C-segment heating. The C-segment temperature sensor 252 is installed in two C-segment temperature sensing holes. The wires at both ends of the C-segment temperature sensor 252 are led out from the openings of the two C-segment temperature sensing holes and pass through the two B-segment wire holes and the two A-segment wire holes in sequence, respectively, and are then connected to the positive and negative terminals of the C-segment temperature sensing.

[0031] In the above structure, the twelve pathways are for the main power-consuming parts of the six main functional components, namely, section A heating resistance wire 231, section A temperature sensor 232, section B heating resistance wire 241, section B temperature sensor 242, section C heating tube 250, section C heating resistance wire 251, and section C temperature sensor 252. The positive and negative power supply wires are provided with independent wiring and mounting holes. Through reasonable hole opening, the power supply wires of all workpieces are staggered and finally connected to the heating tube wiring port 220 for unified power supply. This improves the insulation performance, reduces the probability of interference and short circuit, and also better protects each component, preventing the failure of a single component from affecting other components.

[0032] In some embodiments, in order to further isolate the heating tube wiring port 220 from the heating tube and avoid the heating tube wiring port 220 being affected by high temperature, an insulating heat insulation plate 260 is provided between the heating tube 230 in section A and the heating tube wiring port 220.

[0033] Compared to traditional mold heating tube structures, the multi-segment temperature control heating system for molds in this embodiment uses multiple heating tubes within the same mounting tube 210. Each heating tube is independently heated and controlled by an independently configured heating resistance wire and a temperature sensor. This allows the same heating tube to achieve different heating power at multiple locations, improving the mold's precise temperature control capability. This system is primarily used to address the issue of faster heat dissipation at the outer edge of the hot-pressing mold template 100 compared to the middle edge during production. By setting different heating strategies for each area, temperature consistency across all areas can be achieved. For example, after reaching the predetermined temperature, continuous heating is provided by the A-segment heating tube 230 and C-segment heating tube 250 at both ends to ensure that the temperature at the outer edge of the mold template 100 is consistent with that at the middle edge. This also solves the problem of different temperature drop rates between the outer edge and the middle edge of the mold template 100.

[0034] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] The above are merely preferred embodiments of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A multi-zone temperature controlled heating system for a mold, comprising a mold plate, characterized by: The mold template has several heating tube mounting holes on its side from top to bottom. Each heating tube mounting hole is fitted with multiple temperature-controlled heating tubes. Each temperature-controlled heating tube includes a mounting tube body. A heating tube wiring port is fixedly provided on the side of the mounting tube body near the opening of the heating tube mounting hole. At least three heating tubes are arranged sequentially inside the mounting tube body. Each heating tube is equipped with a heating resistance wire and a temperature sensor. Several wiring terminals are provided in the heating tube wiring port. The heating resistance wire and temperature sensor in each heating tube are electrically connected to the wiring terminals in the heating tube wiring port.

2. The multi-stage temperature control heating system for a mold according to claim 1, wherein The heating element consists of three sections, designated A, B, and C sequentially from the side of the mounting hole closest to the heating element's wiring port. The heating resistance wire and temperature sensor inside the A section heating element are respectively referred to as the A section heating resistance wire and A section temperature sensor. Similarly, the heating resistance wire and temperature sensor inside the B section heating element are designated as the B section heating resistance wire and B section temperature sensor. The wiring terminals inside the heating element's wiring port are designated as follows: A section heating positive terminal, A section heating negative terminal, A section temperature sensing positive terminal, A section temperature sensing negative terminal, B section heating positive terminal, B section heating negative terminal, B section temperature sensing positive terminal, B section temperature sensing negative terminal, and C section heating... The heating element comprises a positive terminal, a negative terminal for heating segment C, a positive terminal for temperature sensing segment C, and a negative terminal for temperature sensing segment C. The two ends of the heating resistance wire in segment A are connected to the positive and negative terminals for heating segment A, respectively. The two ends of the temperature sensor in segment A are connected to the positive and negative terminals for temperature sensing segment A, respectively. The two ends of the heating resistance wire in segment B pass through the heating tube in segment A and are then connected to the positive and negative terminals for heating segment B, respectively. The two ends of the temperature sensor in segment B pass through the heating tube in segment A and are then connected to the positive and negative terminals for temperature sensing segment B, respectively. The two ends of the heating resistance wire in segment C pass through the heating tube in segment B and the heating tube in segment A, respectively, and are then connected to the positive and negative terminals for heating segment C, respectively. The two ends of the temperature sensor in segment C pass through the heating tube in segment B and the heating tube in segment A, respectively, and are then connected to the positive and negative terminals for temperature sensing segment C, respectively.

3. The multi-stage temperature control heating system for a mold according to claim 2, wherein The A-segment heating tube has two A-segment heating holes, two A-segment temperature sensing holes, and eight A-segment wire holes extending axially. The B-segment heating tube has two B-segment heating holes, two B-segment temperature sensing holes, and four B-segment wire holes extending axially. The C-segment heating tube has two C-segment heating holes and two C-segment temperature sensing holes extending axially. All A-segment, B-segment, and C-segment heating resistance wires are U-shaped. The A-segment heating resistance wire is installed in the two A-segment heating holes, and the wires at both ends of the A-segment heating resistance wire are led out from the openings of the two A-segment heating holes and connected to the positive and negative terminals of the A-segment heating resistance wire, respectively. The A-segment temperature sensor is installed in the two A-segment temperature sensing holes, and the wires at both ends of the A-segment temperature sensor are led out from the openings of the two A-segment temperature sensing holes and connected to the positive and negative terminals of the A-segment temperature sensing resistance wire, respectively. The B-segment heating resistance wire is installed in the two B-segment heating holes, and the wires at both ends of the B-segment heating resistance wire are... The heating element is connected to the positive and negative terminals of the B-segment heating system by leading wires from the openings of the two B-segment heating holes and passing through the two A-segment wire holes respectively. The B-segment temperature sensor is installed inside the two B-segment temperature sensing holes. The wires at both ends of the B-segment temperature sensor are led out from the openings of the two B-segment temperature sensing holes and passing through the two A-segment wire holes respectively, and then connected to the positive and negative terminals of the B-segment temperature sensing system respectively. The C-segment heating resistance wire is installed inside the two C-segment heating holes. The wires at both ends of the C-segment heating resistance wire are led out from the openings of the two C-segment heating holes and passing through the two B-segment wire holes and the two A-segment wire holes respectively, and then connected to the positive and negative terminals of the C-segment heating system respectively. The C-segment temperature sensor is installed inside the two C-segment temperature sensing holes. The wires at both ends of the C-segment temperature sensor are led out from the openings of the two C-segment temperature sensing holes and passing through the two B-segment wire holes and the two A-segment wire holes respectively, and then connected to the positive and negative terminals of the C-segment temperature sensing system respectively.

4. The multi-stage temperature control heating system for a mold according to claim 3, wherein The two C-segment heating holes and the two C-segment temperature sensing holes are coaxially arranged in a one-to-one correspondence with the four B-segment wire holes, and the two C-segment heating holes and the two C-segment temperature sensing holes are also coaxially arranged in a one-to-one correspondence with the four A-segment wire holes. The two B-segment heating holes and the two B-segment temperature sensing holes are coaxially arranged in a one-to-one correspondence with the four A-segment wire holes.

5. The multi-stage temperature control heating system for a mold according to claim 4, wherein An insulating heat insulation plate is installed between the heating tube in section A and the wiring port of the heating tube.

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