A heating chamber for a plastic thermoforming machine

Abstract

The utility model provides a kind of heating box for plastic thermoforming machine, comprising: heating box body, heat preservation component includes heat preservation box and multiple locking fittings, inside has heat preservation cavity, heat preservation cavity is filled with heat preservation cotton, and the inner wall of heat preservation cavity is mirror surface, temperature sensing component includes installation fitting and temperature sensing piece, multiple heating components are all arranged on heating box body, each heating component includes heating pipe, two insulation protection sleeves and two fixed fittings. In the utility model, because the material of heat preservation box is stainless steel, and the inner wall of its internal heat preservation cavity is mirror surface, so the problem of falling off of heat preservation cotton in heat preservation cavity due to aging and powdering can be effectively avoided. At the same time, heat preservation box is arranged in the mounting cavity inside heating box body, which can effectively improve the heat preservation effect, and the heat preservation box is made of stainless steel, so that the bottom wall can reflect heat source to accelerate the softening of the product under heat, thereby saving energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of plastic thermoforming machine technology, and specifically to a heating box used in a plastic thermoforming machine. Background Technology

[0002] Existing plastic thermoforming machines, especially portable vacuum thermoforming machines, often have heating chambers that move frequently, making the heating elements inside prone to breakage due to rapid movement or vibration, particularly those using ceramic heating bricks. Damaged heating elements or parts falling onto finished products can increase defect rates or ignite the materials, leading to equipment damage or personal injury and property loss.

[0003] Furthermore, existing heating chambers on the market, including imported ones, typically use a combination of insulation cotton and wire mesh for reinforcement. This insulation method is prone to problems due to heating chamber movement or the aging and powdering of the insulation cotton itself, causing insulation fragments to fall onto the product and affecting the yield rate. Additionally, the current method of installing thermocouples (temperature probes) in heating chambers usually involves drilling holes in the heating chamber body and then inserting them through the holes. This installation method is prone to causing the thermocouples (temperature probes) to loosen due to instability, leading to insulation cotton lint falling off and affecting product production. Therefore, existing technology has limitations. Summary of the Invention

[0004] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a heating box for use in a plastic thermoforming machine.

[0005] This utility model provides a heating box for a plastic thermoforming machine, characterized by: a heating box body having an installation cavity inside; multiple installation holes communicating with the installation cavity on the top wall of the heating box body; and multiple fixing holes communicating with the installation cavity on the front, rear, left, and right side walls of the heating box body, with each fixing hole on the left side wall corresponding to a fixing hole on the right side wall, and each fixing hole on the front side wall corresponding to a fixing hole on the rear side wall.

[0006] The insulation component includes an insulation box and multiple locking fasteners. The insulation box is disposed within an installation cavity via the locking fasteners, and the top wall of the insulation box is fitted against the top wall of the installation cavity. The insulation box has an internal insulation cavity filled with insulation cotton. Multiple mounting grooves are formed on the top wall of the insulation box, between the inner wall of the insulation cavity and the outer wall of the insulation box. Each mounting groove corresponds to a mounting hole. Each locking fastener includes a locking member and a first washer. The locking member has at least a rod-shaped locking portion, and the first washer is sleeved on the locking portion.

[0007] The temperature sensing assembly includes a mounting assembly and a temperature sensing element. The mounting assembly includes a mounting rod, a second washer, and a mounting cap. The mounting rod is a stepped shaft with a large-diameter section and a small-diameter section. The mounting rod passes through the heating chamber body and the insulation box. At least a portion of the large-diameter section of the mounting rod is located outside the heating chamber body, and at least a portion of the small-diameter section of the mounting rod is located outside the insulation box. An insertion hole is provided inside the mounting rod along its axial direction. The second washer is fitted onto the small-diameter section of the mounting rod. The mounting cap is detachably fitted onto the small-diameter section of the mounting rod located outside the insulation box. The temperature sensing element is mounted on the heating chamber body and the insulation box through the insertion hole.

[0008] Multiple heating components are mounted on the heating chamber body. Each heating component includes a heating tube, two insulating protective sleeves, and two fixing parts. Each heating tube passes through two corresponding fixing holes on the heating chamber body, and both ends of the heating tube are located outside the heating chamber body. The insulating protective sleeves are all shaft-shaped. A slot is opened on one end wall of the insulating protective sleeve along its axis, and a locking hole is opened on the other end wall along its axis. The diameter of the slot is equal to the diameter of the heating tube, and the locking hole communicates with the slot. Each fixing part includes a fixing rod, a fixing cap, and a third washer. The fixing rod is detachably mounted in the locking hole, and one end of the fixing rod is located outside the locking hole. The fixing cap is detachably mounted on one end of the fixing rod. The third washer is located between the insulating protective sleeve and the heating chamber body.

[0009] The locking part, the small diameter section of the mounting rod, and the outer wall of the fixing rod are provided with external threads, and the mounting hole, the mounting groove, the mounting cap, and the inner wall of the locking hole are provided with internal threads that mesh with the external threads.

[0010] The heating box for a plastic thermoforming machine provided by this utility model also has the following features: the heating box body is made of stainless steel, and the heat preservation box is made of stainless steel.

[0011] The heating box for a plastic thermoforming machine provided by this utility model also has the following features: the heat preservation box is composed of an upper heat preservation plate and a lower heat preservation plate. The upper heat preservation plate has an upper heat preservation groove for forming a heat preservation cavity, and the lower heat preservation plate has a lower heat preservation groove for forming a heat preservation cavity. Each mounting groove has a through hole and a groove. The through hole is located on the upper heat preservation plate, and the groove is located on the lower heat preservation plate.

[0012] The heating box for a plastic thermoforming machine provided by this utility model also has the following feature: the insulating protective sleeve is made of ceramic material.

[0013] The heating chamber for a plastic thermoforming machine provided by this utility model also has the following feature: the left and / or right sides of the heating chamber body are provided with a protective cover composed of multiple sealing plates.

[0014] The heating chamber for a plastic thermoforming machine provided by this utility model also has the following feature: the inner wall of the heat preservation cavity is mirror-like.

[0015] Functions and effects of utility models

[0016] 1. Because the insulation box is made of stainless steel and the inner wall of its internal insulation cavity is mirrored, it effectively prevents the insulation cotton inside the cavity from shedding due to aging and powdering. At the same time, the insulation box is located inside the mounting cavity of the heating chamber, which effectively improves the insulation effect. Furthermore, the stainless steel material of the insulation box allows its bottom wall to reflect heat, thus accelerating the softening of the product and saving energy.

[0017] 2. Because insulating protective sleeves are used at both ends of the heating tube in conjunction with the third washer for protection, and the heating tube is locked and fixed to the heating box body using fixing rods and fixing caps, it can be ensured that the heating tube is firmly fixed and not easy to loosen. This can reduce the heat energy of multiple heating tubes being directly conducted to the heating box body due to mutual contact.

[0018] 3. The temperature sensing element is fixed to the heating box and the insulation box by the mounting assembly, thereby preventing the temperature sensing element from becoming loose due to the movement of the heating box body. Furthermore, one end of the temperature sensing element is suspended in the insulation cavity, thereby preventing the temperature sensing section of the temperature sensing element from contacting the insulation box and causing errors in the actual temperature sensed, thus ensuring the stability of this utility model during production and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a side sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the heat preservation box in this utility model;

[0022] Figure 4 This is a schematic diagram of the temperature sensing component in this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10. Heating box body; 11. Mounting cavity; 12. Mounting hole; 13. Fixing hole; 20. Insulation box; 21. Upper insulation board; 22. Lower insulation board; 23. Mounting groove; 231. Through hole; 232. Groove; 30. Locking assembly; 31. Locking fastener; 32. First washer; 40. Mounting assembly; 41. Mounting rod; 411. Insertion hole; 42. Second washer; 43. Mounting cap; 44. Locking hole; 45. Locking rod; 50. Temperature sensing element; 60. Heating tube; 70. Insulating protective sleeve; 80. Fixing assembly; 81. Fixing rod; 82. Fixing cap; 83. Third washer; 90. Protective cover; A. Insulation cotton. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments are described in detail with reference to the accompanying drawings. Example

[0026] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a side sectional view of the present invention. Figure 3 This is a schematic diagram of the structure of the heat preservation box in this utility model. Figure 4 This is a schematic diagram of the temperature sensing component in this utility model.

[0027] like Figures 1 to 4 As shown, this embodiment provides a heating box for a plastic thermoforming machine, including: a heating box body 10, a heat preservation component, a temperature sensing component, and multiple heating components.

[0028] like Figure 1 and Figure 2 As shown, the heating box body 10 has an installation cavity 11 inside. The top wall of the heating box body 10 has multiple installation holes 12 that communicate with the installation cavity 11. The front, rear, left, and right side walls of the heating box body 10 all have multiple fixing holes 13 that communicate with the installation cavity 11. For any fixing hole 13 on the left side wall, there is a corresponding fixing hole 13 on the right side wall. For any fixing hole 13 on the front side wall, there is a corresponding fixing hole 13 on the rear side wall.

[0029] In this embodiment, the heating box body 10 is rectangular and made of stainless steel.

[0030] In this embodiment, the left and / or right sides of the heating box body 10 are provided with a protective cover 90 composed of multiple sealing plates. The protective cover 90 has at least one side plate, and a front plate, a rear plate, an upper plate, and a lower plate respectively disposed in front of, behind, above, and below the side plate. The side plate is preferably connected and fixed to the front plate, rear plate, upper plate, and lower plate by screws or bolts.

[0031] like Figure 2 and Figure 3 As shown, the insulation component includes an insulation box 20 and multiple locking fasteners 30.

[0032] In this embodiment, the heat preservation box 20 is disposed in the mounting cavity 11 by the locking fastener 30, and the top wall of the heat preservation box 20 is in contact with the top wall of the mounting cavity 11. The heat preservation box 20 has an internal heat preservation cavity filled with heat preservation cotton. Multiple mounting grooves 23 are formed on the top wall of the heat preservation box 20 between the inner wall of the heat preservation cavity and the outer wall of the heat preservation box 20. Each mounting groove 23 is correspondingly provided with a mounting hole 12. The heat preservation box 20 is composed of an upper heat preservation plate 21 and a lower heat preservation plate 22. The upper heat preservation plate 21 has an upper heat preservation groove for forming the heat preservation cavity, and the lower heat preservation plate 22 has a lower heat preservation groove for forming the heat preservation cavity. Each mounting groove 23 has a through hole 231 and a groove 232. The through hole 231 is located on the upper heat preservation plate 21, and the groove 232 is located on the lower heat preservation plate 22.

[0033] In this embodiment, the insulated box 20 is made of stainless steel.

[0034] In this embodiment, the inner wall of the insulation cavity is preferably a mirror surface.

[0035] In this embodiment, each locking assembly 30 includes a locking member 31 and a first washer 32. The locking member 31 has at least a rod-shaped locking portion, and the first washer 32 is sleeved on the locking portion. The locking member 31 is preferably a bolt, and the first washer 32 is preferably a flat washer or a spring washer.

[0036] like Figure 2 and Figure 4 As shown, the temperature sensing assembly includes a mounting assembly 40 and a temperature sensing element 50.

[0037] In this embodiment, the mounting assembly 40 includes a mounting rod 41, a second washer 42, and a mounting cap 43. The mounting rod 41 is a stepped shaft with a large-diameter section and a small-diameter section. The mounting rod 41 passes through the heating box body 10 and the insulation box 20. At least a portion of the large-diameter section of the mounting rod 41 is located outside the heating box body 10, and at least a portion of the small-diameter section of the mounting rod 41 is located outside the insulation box 20. An insertion hole 411 is provided inside the mounting rod 41 along its axial direction. The second washer 42 is sleeved on the small-diameter section of the mounting rod 41, and the mounting cap 43 is detachably sleeved on the small-diameter section of the mounting rod 41 located outside the insulation box 20. Preferably, the mounting rod 41 is a hollow bolt, the mounting cap 43 is preferably a nut, and the second washer 42 is preferably a flat washer or a spring washer.

[0038] In this embodiment, a locking hole 44 communicating with the insertion hole 411 may be provided on the outer wall of the large-diameter section of the mounting rod 41. A detachable locking rod 45 is provided in the locking hole 44. The inner wall of the locking hole 44 and the outer wall of the locking rod 45 are respectively provided with mutually engaging internal threads and external threads. Moreover, the length of the locking rod 45 is greater than the depth of the locking hole 44.

[0039] In this embodiment, the temperature sensing element 50 is disposed on the heating box body 10 and the insulation box 20 through the insertion hole 411. The temperature sensing element 50 is preferably a temperature sensing probe.

[0040] like Figure 1 and Figure 2 As shown, multiple heating components are mounted on the heating chamber body 10.

[0041] In this embodiment, each heating component includes a heating tube 60, two insulating protective sleeves 70, and two fixing components 80. Each heating tube 60 passes through two corresponding fixing holes 13 on the heating box body 10, and both ends of the heating tube 60 are located outside the heating box body 10. The insulating protective sleeves 70 are all in the shape of shafts. A slot is opened on one end wall of the insulating protective sleeve 70 along its axis, and a locking hole is opened on the other end wall along its axis. The diameter of the slot is equal to the diameter of the heating tube 60, and the locking hole communicates with the slot. Each fixing component 80 includes a fixing rod 81, a fixing cap 82, and a third washer 83. The fixing rod 81 is detachably disposed in the locking hole, and one end of the fixing rod 81 is located outside the locking hole. The fixing cap 82 is detachably disposed on one end of the fixing rod 81. The third washer 83 is disposed between the insulating protective sleeve 70 and the heating box body 10. Among them, the fixing rod 81 is preferably a bolt, the fixing cap 82 is preferably a nut, and the third washer 83 is preferably a flat washer or a spring washer.

[0042] In this embodiment, the heating element 60 is preferably an electric heating element made of metal.

[0043] In this embodiment, the insulating protective sleeve 70 is an insulating protective sleeve made of ceramic material.

[0044] In this embodiment, the length of the fixing rod 81 is greater than the depth of the locking hole.

[0045] In this embodiment, the locking part, the small diameter section of the mounting rod 41, and the outer wall of the fixing rod 81 are provided with external threads, and the inner wall of the mounting hole 12, the mounting groove 23, the mounting cap 43, and the locking hole are provided with internal threads that mesh with the external threads.

[0046] The role and effect of the embodiments

[0047] According to the heating box for a plastic thermoforming machine involved in this utility model, because the insulation box is made of stainless steel and the inner wall of its internal insulation cavity is mirror-finished, it can effectively prevent the insulation cotton inside the insulation cavity from shedding due to aging and powdering. At the same time, the insulation box is located in the mounting cavity inside the heating box body, which can effectively improve the insulation effect. Furthermore, the stainless steel material of the insulation box allows its bottom wall to reflect heat sources, thereby accelerating the softening of the product and saving energy.

[0048] According to the heating box for a plastic thermoforming machine involved in this utility model, because insulating protective sleeves are used at both ends of the heating tube in conjunction with a third washer for protection, and the heating tube is locked and fixed to the heating box body by using a fixing rod and a fixing cap, it can be ensured that the heating tube is firmly fixed and not easy to loosen, thereby reducing the heat energy of multiple heating tubes being directly conducted to the heating box body due to mutual contact.

[0049] According to the heating box for a plastic thermoforming machine involved in this utility model, because the temperature sensing element is fixed to the heating box and the insulation box by the mounting assembly, it is possible to avoid the temperature sensing element becoming loose due to the movement of the heating box body. Furthermore, one end of the temperature sensing element is suspended inside the insulation cavity, thereby preventing the temperature sensing section of the element from contacting the insulation box and causing errors in the actual temperature sensed, thus ensuring the stability of this utility model during production and use.

[0050] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model.

Claims

1. A heating box for use in a plastic thermoforming machine, characterized in that, include: The heating box body has an internal mounting cavity. Multiple mounting holes communicating with the mounting cavity are formed on the top wall of the heating box body. Multiple fixing holes communicating with the mounting cavity are formed on the front, rear, left, and right side walls of the heating box body. Each fixing hole on the left side wall has a corresponding fixing hole on the right side wall, and each fixing hole on the front side wall has a corresponding fixing hole on the rear side wall. An insulation component includes an insulation box and multiple locking fasteners. The insulation box is disposed within a mounting cavity via the locking fasteners, and the top wall of the insulation box is abutted against the top wall of the mounting cavity. The insulation box has an internal insulation cavity filled with insulation cotton. Multiple mounting grooves are formed on the top wall of the insulation box, located between the inner wall of the insulation cavity and the outer wall of the insulation box. Each mounting groove corresponds to a mounting hole. Each locking fastener includes a locking member and a first washer. The locking member has at least a rod-shaped locking portion, and the first washer is sleeved on the locking portion. A temperature-sensing assembly includes a mounting assembly and a temperature-sensing element. The mounting assembly includes a mounting rod, a second washer, and a mounting cap. The mounting rod is a stepped shaft with a large-diameter section and a small-diameter section. The mounting rod passes through the heating chamber body and the insulation box. At least a portion of the large-diameter section of the mounting rod is located outside the heating chamber body, and at least a portion of the small-diameter section of the mounting rod is located outside the insulation box. An insertion hole is formed inside the mounting rod along its axial direction. The second washer is fitted onto the small-diameter section of the mounting rod. The mounting cap is detachably fitted onto the small-diameter section of the mounting rod located outside the insulation box. The temperature-sensing element is disposed on the heating chamber body and the insulation box through the insertion hole. Multiple heating components are disposed on the heating chamber body. Each heating component includes a heating tube, two insulating protective sleeves, and two fixing parts. Each heating tube passes through the two corresponding fixing holes on the heating chamber body, and both ends of the heating tube are located outside the heating chamber body. Each insulating protective sleeve is shaped like a shaft. A slot is formed on one end wall of the insulating protective sleeve along its axis, and a locking hole is formed on the other end wall along its axis. The diameter of the slot is equal to the diameter of the heating tube. The locking hole communicates with the slot. Each fixing part includes a fixing rod, a fixing cap, and a third washer. The fixing rod is detachably disposed in the locking hole, and one end of the fixing rod is located outside the locking hole. The fixing cap is detachably disposed on one end of the fixing rod. The third washer is disposed between the insulating protective sleeve and the heating chamber body. The locking part, the small diameter section of the mounting rod, and the outer wall of the fixing rod are provided with external threads, and the inner wall of the mounting hole, the mounting groove, the mounting cap, and the locking hole are provided with internal threads that mesh with the external threads.

2. The heating box for a plastic thermoforming machine according to claim 1, characterized in that: in, The heating box body is made of stainless steel, and the insulation box is made of stainless steel.

3. The heating box for a plastic thermoforming machine according to claim 1, characterized in that: in, The insulation box is composed of an upper insulation plate and a lower insulation plate. The upper insulation plate has an upper insulation groove for forming the insulation cavity, and the lower insulation plate has a lower insulation groove for forming the insulation cavity. Each installation groove has a through hole and a recessed part. The through hole is located on the upper insulation plate, and the recessed part is located on the lower insulation plate.

4. The heating box for a plastic thermoforming machine according to claim 1, characterized in that: in, The insulating protective sleeve is made of ceramic.

5. The heating box for a plastic thermoforming machine according to claim 1, characterized in that: in, The heating chamber body is provided with a protective cover consisting of multiple sealing plates on the left and / or right sides.

6. The heating chamber for a plastic thermoforming machine according to claim 1, characterized in that: in, The inner wall of the insulation cavity is mirrored.

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