Temperature control assembly for injection mold

Abstract

The temperature control assembly comprises a ceramic plate, a plurality of evenly-distributed installation grooves and stepped holes are machined in the front face of the ceramic plate, metal heat conduction plates are fixed to the installation grooves, and electric heating pipes and water cooling pipes are arranged between the metal heat conduction plates and the installation grooves in a clamped mode. The water inlet end of the water cooling pipe is communicated with an external cooling water source through a water inlet pipe, an electric flow adjusting valve is installed on the water inlet pipe, a metal heat conduction cylinder is installed in each stepped hole, and a temperature sensor is installed in each metal heat conduction cylinder. A signal input interface of the PLC is connected with a digital signal output end of the analog-to-digital converter, a digital signal input end of the analog-to-digital converter is connected with a signal output end of the temperature sensor, and a signal output interface of the PLC is respectively connected with input loops of the relays; and an output loop of each relay is connected with one electric heating pipe or one electric flow regulating valve. The device is used for monitoring and controlling the temperature difference of all areas of a mold plate on an injection mold.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control of injection molds, in particular to a temperature control component for an injection mold. Background Art

[0002] Injection molds have high requirements for temperature control. There are obvious differences in the heat preservation effect and heat dissipation effect between the central area and the peripheral area of the injection mold. The existing temperature control structures generally adopt overall control, resulting in a difference in temperature between the central area and the peripheral area of the injection mold. This causes the cooling speed of the injection plastic melt in the injection mold to be different. Even before the injection plastic melt completely fills the injection cavity, partial cooling and solidification occur, causing the runner to be blocked.

[0003] In the prior art, a patent with the publication number CN204196181U discloses a temperature control device for an injection mold, which is characterized in that it includes an injection molding machine, a relay and a heater are connected to each other on the injection molding machine, and the operation of the heater is controlled by the on-off of the relay; on the injection molding machine, there is an injection mold used in cooperation with the injection molding machine, and a detection device is arranged in the injection mold; the injection temperature of the injection mold is set, and the injection molding machine starts to work. The detection device arranged in the injection mold transmits the real-time temperature signal of the injection mold to the controller after processing. The controller first compares the temperature signal value with the preset temperature, calculates the temperature deviation and the deviation change rate, and then calculates the value through a control algorithm to obtain the on-off time ratio of the relay, that is, the output value at the Kth sampling moment, so as to realize the temperature control of the injection mold.

[0004] In the above technical solution, the mold adopts a dual pipeline for both heating and cooling, which is for overall control, and there is a temperature difference in a local area of the mold plate.

[0005] In order to solve one of the above problems, the present application provides a temperature control component for an injection mold. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the problems existing in the prior art, and to provide a temperature control component for an injection mold, which is used on an injection mold to monitor and control the temperature difference of each area of the mold plate.

[0007] To achieve the above object, the utility model adopts the following technical solutions: A temperature control component for an injection mold, including a ceramic plate. A plurality of installation grooves and a plurality of stepped holes are machined on the front surface of the ceramic plate. The installation grooves and the stepped holes are evenly distributed on the ceramic plate. A metal heat conducting plate is fixed on the installation groove. An electric heating tube and a water cooling tube are clamped between the metal heat conducting plate and the installation groove. The water inlet end of the water cooling tube is communicated with an external cooling water source through a water inlet pipe. An electric flow regulating valve is installed on the water inlet pipe. A metal heat conducting cylinder is installed in each stepped hole, and a temperature sensor is installed in each metal heat conducting cylinder;

[0008] A PLC controller. The signal input interface of the PLC controller is connected to the digital signal output end of an analog-to-digital converter. The digital signal input end of the analog-to-digital converter is connected to the signal output end of the temperature sensor. The signal output interface of the PLC controller is respectively connected to the input circuits of a plurality of relays. The output circuit of each relay is connected to an electric heating tube or an electric flow regulating valve.

[0009] Further, as described above, the installation groove includes a first installation groove and a second installation groove. The second installation groove is semi-surrounded in the enclosed area of the first installation groove. The metal heat conducting plate includes a first metal heat conducting plate and a second metal heat conducting plate. The first metal heat conducting plate is installed on the first installation groove, and the second metal heat conducting plate is installed on the second installation groove.

[0010] Further, as described above, a first heating tube groove and a first water cooling tube groove are opened at the bottom of the first installation groove. A third heating tube groove and a third water cooling tube groove are opened on the back surface of the first metal heat conducting plate. A second heating tube groove and a second water cooling tube groove are opened at the bottom of the second installation groove. A fourth heating tube groove and a fourth water cooling tube groove are opened on the back surface of the second metal heat conducting plate.

[0011] Further, as described above, the electric heating tube includes a first electric heating tube and a second electric heating tube. The water cooling tube includes a first water cooling tube and a second water cooling tube. The first electric heating tube is clamped between the first heating tube groove and the third heating tube groove. The first water cooling tube is clamped between the first water cooling tube groove and the third water cooling tube groove. The second electric heating tube is clamped between the second heating tube groove and the fourth heating tube groove. The second water cooling tube is clamped between the second water cooling tube groove and the fourth water cooling tube groove.

[0012] Further, as described above, the first electric heating tube is located in the enclosed area of the first water cooling tube, and the second electric heating tube is located in the enclosed area of the second water cooling tube.

[0013] Further, as described above, the front surfaces of the first metal heat conducting plate, the second metal heat conducting plate, and the metal heat conducting cylinder are located on the same plane and are parallel to the front surface of the ceramic plate.

[0014] Further, the front surface of the first metal heat conducting plate as described above is higher than the front surface of the ceramic plate, and the height difference between the front surface of the first metal heat conducting plate and the front surface of the ceramic plate is 0.5 - 1 mm.

[0015] Further, a square annular heat insulation cotton sleeve is installed around the ceramic plate as described above, and the front surface of the heat insulation cotton sleeve is in the same plane as the front surface of the first metal heat conducting plate.

[0016] Further, a plurality of mounting holes penetrating through the ceramic plate are provided on the ceramic plate as described above; the arrangements of the mounting groove, the metal heat conducting plate, the electric heating tube and the water cooling tube are all in a C shape.

[0017] Further, the aperture of the stepped hole located on the front surface of the ceramic plate is larger than the aperture of the stepped hole located on the back surface of the ceramic plate.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: This device is used on an injection mold to monitor and control the temperature difference in each area of the mold plate.

[0019] The ceramic plate is installed on the mold plate of the injection mold, and the front surfaces of the metal heat conducting plate and the metal heat conducting cylinder are respectively in close contact with the mold plate. By monitoring the temperature of different areas of the mold plate and respectively controlling the start and stop of the electric heating tube and the water cooling tube according to the temperature difference between the middle part and the outside of the mold plate, the temperature difference between the middle part and the outside of the mold plate is reduced, which is beneficial to the free flow of the molten injection plastic melt to fill the injection mold cavity, is beneficial to improving the uniformity of the cooling of the injection plastic melt in the injection mold, and obtaining products with stable injection quality. Description of the Drawings

[0020] Figure 1 is the three-dimensional view of the present utility model Figure 1 ;

[0021] Figure 2 is the three-dimensional view of the present utility model Figure 2 ;

[0022] Figure 3 is the schematic structural view of the ceramic plate in the present utility model;

[0023] Figure 4 is the schematic structural view of the first metal heat conducting plate in the present utility model;

[0024] Figure 5 is the schematic structural view of the second metal heat conducting plate in the present utility model;

[0025] Figure 6 is the position relationship diagram of the first electric heating tube, the second electric heating tube, the first water cooling tube and the second water cooling tube in the present utility model;

[0026] Figure 7It is the circuit schematic diagram of the present utility model;

[0027] In the figure: 1, ceramic plate; 2, installation groove; 21, first installation groove; 211, first heating tube groove; 212, first water cooling tube groove; 22, second installation groove; 221, second heating tube groove; 222, second water cooling tube groove; 3, stepped hole; 4, metal heat conducting plate; 41, first metal heat conducting plate; 411, third heating tube groove; 412, third water cooling tube groove; 42, second metal heat conducting plate; 421, fourth heating tube groove; 422, fourth water cooling tube groove; 5, metal heat conducting cylinder; 6, electric heating tube; 61, first electric heating tube; 62, second electric heating tube; 7, water cooling tube; 71, first water cooling tube; 72, second water cooling tube; 8, temperature sensor; 9, heat preservation cotton sleeve; 10, installation hole; 100, PLC controller; 200, analog-to-digital converter; 300, relay; 400, electric flow regulating valve. Specific embodiments

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "fixed", "installed", "connected", "set", etc. should be understood in a broad sense. For example, when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "installed on" another element, it can be directly installed on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements.

[0030] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Embodiment 1

[0033] Referring to Figures 1-7 As shown, a temperature control component for an injection mold of the present utility model includes a ceramic plate 1, a PLC controller 100, a plurality of analog-to-digital converters 200, and a plurality of relays 300. Among them, two "C"-shaped installation grooves 2 and a plurality of uniformly distributed stepped holes 3 are provided on the front surface of the ceramic plate 1. One of the installation grooves 2 is semi-enclosed in the enclosed area of the other installation groove 2. A metal heat conduction plate 4 is installed in each installation groove 2, and a metal heat conduction cylinder 5 is installed in each stepped hole 3. The ceramic plate 1 is installed on the mold plate, and the front surfaces of the metal heat conduction plate 4 and the metal heat conduction cylinder 5 are respectively in close contact with the mold plate; between the back surface of each metal heat conduction plate 4 and the front surface of the ceramic plate 1, an electric heating tube 6 and a water cooling tube 7 are sandwiched. The water inlet end of the water cooling tube 7 is connected to a cooling water source through a water inlet pipe, and an electric flow regulating valve 400 is installed on the water inlet pipe. The output circuit of each relay 300 is connected to an electric heating tube 6 or an electric flow regulating valve 400; a temperature sensor 8 is installed in each metal heat conduction cylinder 5. The signal output terminal of the temperature sensor 8 is connected to the analog signal input terminal of the analog-to-digital converter 200, the digital signal output terminal of the analog-to-digital converter 200 is connected to the signal input interface of the PLC controller 100, and the signal output interface of the PLC controller 100 is respectively connected to the input circuits of the respective relays 300.

[0034] Embodiment 2

[0035] Referring to Figures 1-7 As shown, on the basis of the technical solution of Embodiment 1, a temperature control component for an injection mold, the two installation grooves 2 are respectively a first installation groove 21 and a second installation groove 22. The second installation groove 22 is semi-enclosed in the enclosed area of the first installation groove 21. The processing positions of the first installation groove 21 and the second installation groove 22 on the ceramic plate 1 are evenly distributed and designed, and the overall shape is designed in a "C" shape; the two metal heat conduction plates 4 are divided into a first metal heat conduction plate 41 and a second metal heat conduction plate 42. The first metal heat conduction plate 41 is installed in the first installation groove 21, and the second metal heat conduction plate 42 is installed in the second installation groove 22.

[0036] Further, the electric heating tube 6 is divided into a first electric heating tube 61 and a second electric heating tube 62, the water cooling tube 7 is divided into a first water cooling tube 71 and a second water cooling tube 72. A first heating tube groove 211 and a first water cooling tube groove 212 are formed at the bottom of the first installation groove 21. A third heating tube groove 411 and a third water cooling tube groove 412 are formed on the back surface of the first metal heat conducting plate 41. The first electric heating tube 61 is clamped between the first heating tube groove 211 and the third heating tube groove 411, and the first water cooling tube 71 is clamped between the first water cooling tube groove 212 and the third water cooling tube groove 412. A second heating tube groove 221 and a second water cooling tube groove 222 are formed at the bottom of the second installation groove 22. A fourth heating tube groove 421 and a fourth water cooling tube groove 422 are formed on the back surface of the second metal heat conducting plate 42. The second electric heating tube 62 is clamped between the second heating tube groove 221 and the fourth heating tube groove 421, and the second water cooling tube 72 is clamped between the second water cooling tube groove 222 and the fourth water cooling tube groove 422. By respectively processing arc-shaped tube grooves on the installation groove 2 and the metal heat conducting plate 4 to clamp the electric heating tube 6 and the water cooling tube 7, their fixation and contact are realized, facilitating heat transfer.

[0037] Wherein, the first electric heating tube 61 is located in the enclosed area of the first water cooling tube 71, and the second electric heating tube 62 is located in the enclosed area of the second water cooling tube 72, that is, the water inlet end, the water outlet end and the pipe fittings of the water cooling tube 7 are arranged in the area enclosed by the electric heating tube 6 from the head and the tail.

[0038] Embodiment 3

[0039] Referring to Figures 1-7 As shown, on the basis of the technical solution of Embodiment 2, for a temperature control component for an injection mold, regarding the design relationship of the size and position of the metal heat conducting plate 4, the front surfaces of the first metal heat conducting plate 41, the second metal heat conducting plate 42 and the metal heat conducting cylinder 5 are located on the same plane, and the front surface of the first metal heat conducting plate 41 is parallel to the front surface of the ceramic plate 1. Specifically, the front surface of the first metal heat conducting plate 41 protrudes from the front surface of the ceramic plate 1, and the distance between the front surface of the first metal heat conducting plate 41 and the front surface of the ceramic plate 1 is 0.5 - 1 millimeter. That is, by attaching the metal heat conducting plate 4 to the mold plate of the injection mold, the temperature difference change of each area of the mold plate is adjusted.

[0040] Wherein, a square annular heat preservation cotton sleeve 9 is installed on the outer side of the ceramic plate 1, and the front surface of the heat preservation cotton sleeve 9 is located on the same plane as the front surface of the first metal heat conducting plate 41. The design of the heat preservation cotton sleeve 9 can prevent air from flowing freely in the gap between the ceramic plate 1 and the mold plate, reducing the influence of room temperature on the temperature of the injection mold.

[0041] Among them, the aperture of the stepped hole 3 on the front side of the ceramic plate 1 is larger than the aperture of the stepped hole 3 on the back side of the ceramic plate 1, which is used for installing the metal heat conduction cylinder 5 to facilitate the installation of the temperature sensor 8.

[0042] Among them, a plurality of mounting holes 10 penetrating the ceramic plate 1 are provided on the ceramic plate 1 to facilitate the connection and fixation of the ceramic plate 1 to the mold plate with bolts; the mounting grooves 2, the metal heat conduction plates 4, the electric heating tubes 6 and the water cooling tubes 7 are all arranged in a C shape, and the mounting positions of the components are interrelated.

[0043] Working principle: Two metal heat conduction plates 4 are installed on the ceramic plate 1, and one metal heat conduction plate 4 is semi-surrounded in the enclosed area of the other metal heat conduction plate 4. An electric heating tube 6 and a water cooling tube 7 are clamped between each metal heat conduction plate 4 and the ceramic plate 1, which plays a role in coordinating and regulating the heating and cooling of the water cooling to be stable. At the same time, a plurality of evenly distributed metal heat conduction cylinders 5 are installed on the ceramic plate 1, and a temperature sensor 8 is installed in the metal heat conduction cylinder 5. The ceramic plate 1 is installed on the mold plate of the injection mold, and the front sides of the metal heat conduction plate 4 and the metal heat conduction cylinder 5 are respectively in close contact with the mold plate. The temperature of different areas of the mold plate is monitored by each temperature sensor 8, and then according to the temperature difference between the middle and the outside of the mold plate, the PLC controller 100 controls the electric heating tube 6 and the water cooling tube 7 to work alone or simultaneously. Specifically, the electric heating is powered on to start heating or powered off, and the electric flow regulating valve 400 is opened or closed. The heat of each area of the mold plate is quickly transferred by its heating and water cooling, so as to reduce the temperature difference between the middle and the outside of the mold plate, which is beneficial to the free flow of the molten injection plastic melt to fill the injection cavity, and is beneficial to improving the uniformity of the cooling of the injection plastic melt in the injection mold.

[0044] In the device of the present utility model, regarding the assembly and cooperation relationship of each component, components such as the PLC controller 100, the analog-to-digital converter 200, the relay 300, and the electric flow regulating valve 400 are of the prior art or materials. Those skilled in the art can directly purchase or customize them according to the required product models and specifications.

[0045] The electrical components mentioned in the text are all electrically connected to the external main controller and 220V mains or industrial electricity, and the main controller can be a conventional known device such as a computer that plays a control role.

[0046] The above are only the preferred specific embodiments of the present utility model. Common knowledge such as specific structures and characteristics known in the solution is not described in detail herein. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. Any person skilled in the technical field, within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A temperature control component for an injection mold, characterized in that It includes a ceramic plate (1). Multiple mounting grooves (2) and multiple stepped holes (3) are machined on the front surface of the ceramic plate (1). The mounting grooves (2) and the stepped holes (3) are evenly distributed on the ceramic plate (1). A metal heat conducting plate (4) is fixed on the mounting groove (2). An electric heating tube (6) and a water cooling tube (7) are clamped between the metal heat conducting plate (4) and the mounting groove (2). The water inlet end of the water cooling tube (7) is communicated with an external cooling water source through a water inlet pipe. An electric flow regulating valve (400) is installed on the water inlet pipe. A metal heat conducting cylinder (5) is installed in each stepped hole (3), and a temperature sensor (8) is installed in each metal heat conducting cylinder (5). A PLC controller (100). The signal input interface of the PLC controller (100) is connected to the digital signal output end of an analog-to-digital converter (200). The digital signal input end of the analog-to-digital converter (200) is connected to the signal output end of the temperature sensor (8). The signal output interface of the PLC controller (100) is respectively connected to the input circuits of multiple relays (300). The output circuit of each relay (300) is connected to an electric heating tube (6) or an electric flow regulating valve (400).

2. The temperature control component for an injection mold according to claim 1, wherein, The mounting groove (2) includes a first mounting groove (21) and a second mounting groove (22). The second mounting groove (22) is semi-surrounded in the enclosed area of the first mounting groove (21). The metal heat conducting plate (4) includes a first metal heat conducting plate (41) and a second metal heat conducting plate (42). The first metal heat conducting plate (41) is installed on the first mounting groove (21), and the second metal heat conducting plate (42) is installed on the second mounting groove (22).

3. The temperature control component for an injection mold according to claim 2, characterized in that, A first heating tube groove (211) and a first water cooling tube groove (212) are opened at the bottom of the first mounting groove (21). A third heating tube groove (411) and a third water cooling tube groove (412) are opened on the back surface of the first metal heat conducting plate (41). A second heating tube groove (221) and a second water cooling tube groove (222) are opened at the bottom of the second mounting groove (22). A fourth heating tube groove (421) and a fourth water cooling tube groove (422) are opened on the back surface of the second metal heat conducting plate (42).

4. A temperature control component for an injection mold according to claim 3, characterized in that, The electric heating tube (6) includes a first electric heating tube (61) and a second electric heating tube (62). The water cooling tube (7) includes a first water cooling tube (71) and a second water cooling tube (72). The first electric heating tube (61) is clamped between the first heating tube groove (211) and the third heating tube groove (411). The first water cooling tube (71) is clamped between the first water cooling tube groove (212) and the third water cooling tube groove (412). The second electric heating tube (62) is clamped between the second heating tube groove (221) and the fourth heating tube groove (421). The second water cooling tube (72) is clamped between the second water cooling tube groove (222) and the fourth water cooling tube groove (422).

5. The temperature control component for an injection mold according to claim 4, wherein The first electric heating tube (61) is located in the enclosed area of the first water cooling tube (71), and the second electric heating tube (62) is located in the enclosed area of the second water cooling tube (72).

6. The temperature control component for an injection mold according to claim 5, characterized in that, The front surfaces of the first metal heat conducting plate (41), the second metal heat conducting plate (42), and the metal heat conducting cylinder (5) are in the same plane and parallel to the front surface of the ceramic plate (1).

7. The temperature control component for an injection mold according to claim 6, characterized in that, The height of the front surface of the first metal heat conducting plate (41) is higher than that of the front surface of the ceramic plate (1), and the height difference between the front surface of the first metal heat conducting plate (41) and the front surface of the ceramic plate (1) is 0.5 - 1 mm.

8. A temperature control component for an injection mold according to claim 7, wherein, A square annular heat insulation cotton sleeve (9) is installed around the ceramic plate (1), and the front surface of the heat insulation cotton sleeve (9) is in the same plane as the front surface of the first metal heat conducting plate (41).

9. A temperature control component for an injection mold according to claim 8, characterized in that, A plurality of mounting holes (10) penetrating the ceramic plate (1) are provided on the ceramic plate (1); the mounting grooves (2), the metal heat conducting plates (4), the electric heating tubes (6), and the water cooling tubes (7) are all arranged in a C shape.

10. The temperature control component for an injection mold according to claim 9, characterized in that, The aperture of the stepped hole (3) on the front surface of the ceramic plate (1) is larger than the aperture of the stepped hole (3) on the back surface of the ceramic plate (1).

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