A mold heating device for molding silica gel

Abstract

The utility model discloses a mould heating device of silica gel forming relates to the technical field of mould, and it discloses including front mould, back mould and core mould, and the front mould includes the injection mould front plate, first oil heat temperature control front plate, second oil heat temperature control front plate and electric heat temperature control front plate that connect in proper order, and the back mould includes the bearing plate, oil heat temperature control back plate and electric oil heat temperature control back plate that connect in proper order, and the core mould is installed respectively in electric heat temperature control front plate and electric oil heat temperature control back plate, and electric heat temperature control front plate and electric oil heat temperature control back plate are mutually matched, and the injection mould front plate is linked together with the core mould, and the injection mould front plate, first oil heat temperature control front plate and second oil heat temperature control front plate all are equipped with oil temperature pipeline structure. The utility model reaches the auxiliary silica gel vulcanization temperature of silica gel in the forming process temperature optimum, thereby promotes yield, promotes production capacity, and stabilizes quality.

Description

Technical Field

[0001] This utility model relates to the technical field of molds, and in particular to a heating device for silicone molding molds. Background Technology

[0002] Traditional injection molds rely on either oil heating or electric heating for temperature control, which has significant limitations. Oil heating systems have a slow response and are unable to meet the rapid temperature changes required in silicone molding. While electric heating systems have a fast response, they consume a lot of energy and are prone to localized overheating, which can lead to silicone degradation or thermal stress deformation. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a heating device for silicone molding molds.

[0004] The objective of this utility model is achieved through the following technical solution: A silicone molding mold heating device includes a front mold, a rear mold, and a core mold. The front mold includes an injection molding front plate, a first oil-heated temperature-controlled front plate, a second oil-heated temperature-controlled front plate, and an electric heating temperature-controlled front plate connected in sequence. The rear mold includes a support plate, an oil-heated temperature-controlled rear plate, and an electric oil-heated temperature-controlled rear plate connected in sequence. The two ends of the core mold are respectively installed on the opposite surfaces of the electric heating temperature-controlled front plate and the electric oil-heated temperature-controlled rear plate. The electric heating temperature-controlled front plate and the electric oil-heated temperature-controlled rear plate are matched with each other. The injection molding front plate is connected to the core mold. The injection molding front plate, the first oil-heated temperature-controlled front plate, and the second oil-heated temperature-controlled front plate are all provided with oil temperature pipe structures. The electric heating temperature-controlled front plate is provided with a through first heating tube and a first temperature-sensing needle located on the side of the first heating tube. The electric oil-heated temperature-controlled rear plate is provided with a second heating tube, a second temperature-sensing needle, and a fifth oil passage pipe. The second temperature-sensing needle is located between the second heating tube and the fifth oil passage pipe. The fifth oil passage pipe is connected to the core mold.

[0005] Preferably, the injection front plate is provided with a first injection channel and a first oil pipe. The first injection channel extends vertically through the injection front plate, the first oil pipe is horizontally arranged, the first oil pipe intersects with the first injection channel, and the injection channel is connected to the core mold.

[0006] Preferably, the first oil-heated temperature control front plate is provided with a horizontally penetrating second oil passage pipe.

[0007] Preferably, the second oil heating temperature control front plate is provided with a horizontally penetrating third oil passage pipe and a vertically penetrating second injection channel, wherein the third oil passage pipe intersects with the second injection channel.

[0008] Preferably, the oil-heated temperature control plate is provided with a fourth oil passage pipe, which is connected to the core mold.

[0009] Preferably, the fourth oil circuit pipe includes a first inlet / outlet pipe, a vertical pipe, a first connecting pipe, and a first heat-conducting end. The two ends of the first connecting pipe are respectively connected to the first inlet / outlet pipe through the vertical pipe. The connection between the first connecting pipe and the vertical pipe is connected to the core mold through the first heat-conducting end. The first inlet / outlet pipe is disposed inside the oil-heated temperature control back plate.

[0010] Preferably, the fifth oil circuit pipe includes a second inlet / outlet pipe, an L-shaped pipe, a second connecting pipe, and a second heat-conducting end. The second connecting pipe is connected to the second inlet / outlet pipe through the L-shaped pipe, and the connection between the second connecting pipe and the L-shaped pipe is connected to the core mold through the second heat-conducting end.

[0011] This utility model has the following advantages and beneficial effects compared to the prior art:

[0012] This invention employs a layered design of "oil-heated uniform temperature + electric heating fine adjustment" for the front mold, avoiding localized overheating or insufficient curing of the silicone. The rear mold's electro-oil heating temperature control plate uses a combination of oil heating and electric heating to ensure that the overall temperature difference of the core mold is ≤5℃. The temperature difference between the center and surface of the silicone is reduced from the traditional 20℃ to within 5℃, and the shrinkage rate is controlled below 0.8%. This allows the silicone to reach the optimal auxiliary silicone vulcanization temperature during the molding process, thereby improving yield, increasing production capacity, and stabilizing quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a silicone molding mold heating device according to the present invention;

[0014] Figure 2 This is a cross-sectional view of a silicone molding mold heating device according to the present invention;

[0015] Figure 3 This is a schematic diagram of the injection molding front plate of a silicone molding mold heating device according to the present invention;

[0016] Figure 4 yes Figure 3 Sectional view at point A;

[0017] Figure 5 This is a schematic diagram of the first oil-heated temperature control front plate of a silicone molding mold heating device according to the present invention.

[0018] Figure 6 yes Figure 5 Sectional view at point B;

[0019] Figure 7 This is a schematic diagram of the second oil-heated temperature control front plate of a silicone molding mold heating device according to the present invention.

[0020] Figure 8 yes Figure 7 Sectional view at point C;

[0021] Figure 9 yes Figure 7 Sectional view at point D;

[0022] Figure 10 This is a schematic diagram of the electric heating temperature control front plate of a silicone molding mold heating device according to this utility model;

[0023] Figure 11 yes Figure 10 Sectional view at point E;

[0024] Figure 12 yes Figure 10 Sectional view at point F;

[0025] Figure 13 yes Figure 10 Sectional view at point G;

[0026] Figure 14 This is a schematic diagram of the back plate of the electric oil heating device for heating a silicone molding mold according to this utility model.

[0027] Figure 15 yes Figure 14 Sectional view at H;

[0028] Figure 16 yes Figure 14 Sectional view at point I;

[0029] Figure 17 This is a schematic diagram of the fifth oil circuit pipe of a silicone molding mold heating device according to this utility model;

[0030] Figure 18 This is a schematic diagram of the oil-heated temperature control back plate of a silicone molding mold heating device according to the present invention;

[0031] Figure 19 This is a schematic diagram showing the connection of the fourth oil circuit pipe, the fifth oil circuit pipe, and the core mold of a silicone molding mold heating device according to this utility model;

[0032] Figure 20 This is a schematic diagram showing the connection of the fourth oil circuit pipe, the fifth oil circuit pipe, and the core mold of a silicone molding mold heating device according to this utility model;

[0033] Figure 21 This is a schematic diagram of the fourth oil circuit pipe of a silicone molding mold heating device according to this utility model;

[0034] The components in the attached diagram are labeled as follows: 1-Front mold; 11-Injection front plate; 111-First oil passage pipe; 112-First injection channel; 12-First oil-heated control front plate; 121-Second oil passage pipe; 122-Runner; 13-Second oil-heated control front plate; 131-Third oil passage pipe; 132-Second injection pipe; 14-Electric heating control front plate; 141-First heating element; 142-First temperature sensing needle; 143-Third injection pipe; 2-Rear mold; 21-Bearing plate; 22-Rear plate of oil-heated control; 221-Fourth oil circuit pipe; 221a-First inlet / outlet pipe; 221b-Vertical pipe; 221c-First connecting pipe; 221d-First heat-conducting end; 222-Core mold mounting groove; 23-Rear plate of electric oil-heated control; 231-Second heating element; 232-Second temperature sensing needle; 233-Fifth oil circuit pipe; 233a-Second inlet / outlet pipe; 233b-L-shaped pipe; 233c-Second connecting pipe; 233d-Second heat-conducting end; 3-Core mold. Detailed Implementation

[0035] The utility model objective of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the implementation of this utility model is not limited to the following embodiments.

[0036] In this embodiment, in the first direction x, the arrow points to the right and to the left; in the second direction y, the arrow points to the rear and to the front; and in the third direction z, the arrow points to the top and to the bottom.

[0037] like Figure 1 and 2 As shown, a silicone molding die heating device includes a front mold 1, a rear mold 2, and a core mold 3. The front mold 1 includes an injection molding front plate 11, a first oil-heated front plate 12, a second oil-heated front plate 13, and an electric heating front plate 14 connected sequentially in the third direction z. The rear mold 2 includes a support plate 21, an oil-heated rear plate 22, and an electric oil-heated rear plate 23 connected sequentially in the third direction z. The upper core mold of the core mold 3 is installed at the bottom center of the electric heating front plate 14, and the lower core mold of the core mold 3 is installed at the top center of the electric oil-heated rear plate 23. Both the first oil-heated front plate 12 and the second oil-heated front plate 13 are provided with flow channels, and the injection molding front plate 11 is connected to the upper core mold of the core mold 3 through the flow channels. The electric heating front plate 14 is connected to the electric oil-heated rear plate 23 through guide pillars (not shown in the figure).

[0038] The front mold 1 is used for layered temperature control and injection guidance. The rear mold 2 is used for support and core heating. The core mold 3 is used for silicone molding and heat conduction. The injection front plate 11 serves as the initial inlet for molten silicone, uniformly heating the injection runner to prevent premature cooling and solidification of the silicone. The first oil-heated front plate 12 maintains the uniformity of the plate temperature, preventing product deformation due to local temperature differences. The second oil-heated front plate 13 directly heats the injection pipes, ensuring silicone fluidity and providing auxiliary heating for the plate itself to compensate for heat loss. The electric heating front plate 14 achieves high-precision temperature control with rapid response, monitoring and feeding back the temperature in real time. The support plate 21 serves as the base for the rear mold, ensuring pressure transmission stability and overall mold rigidity. The oil-heated rear plate 22 is embedded in the core mold to form localized enhanced heating. The electric oil-heated rear plate 23 embeds the fifth oil circuit pipe 233 into the core mold, with the second heating element 231 located outside the fifth oil circuit pipe, forming a dual guarantee of "oil-heated main control + electric heating auxiliary".

[0039] like Figure 3 and 4 As shown, the injection molding front plate 11 includes four first injection channels 112 and an oil temperature pipeline structure. The four first injection channels 112 vertically penetrate the injection molding front plate 11 from top to bottom in the third direction z. The first injection channels 112 are prior art and will not be described in detail. The oil temperature pipeline structure includes eight first oil pipes 111, which are arranged in two rows and four columns. Each column has two first oil pipes 111, one of which is responsible for oil inlet and the other for oil outlet. The eight first oil pipes 111 are connected to the four first injection channels 112 respectively. The first injection channels 112 are used to transport raw materials to the distribution channel; the first oil pipes 111 are used to form a circulation loop in an "oil inlet-oil outlet" pairing to uniformly heat the injection channel and prevent the silicone from cooling and solidifying prematurely.

[0040] like Figure 5 and 6 As shown, the first oil-heated front panel 12 has an oil temperature pipe structure and four branch channels 122; the oil temperature pipe structure includes four second oil pipes 121. The four second oil pipes 121 are arranged sequentially along the axial direction of the first oil-heated front panel 12 and pass through the first oil-heated front panel 12 in the second direction y. The four second oil pipes 121 are evenly distributed in the first oil-heated front panel 12 and are located between the four branch channels 122. The upper ends of the four branch channels 122 are connected to the first injection channel 112, and the lower ends of the four branch channels 122 are connected to the second injection channel 132 of the second oil-heated front panel 13. The second oil pipes 121 are used to maintain the temperature uniformity of the panel and avoid product deformation due to local temperature differences. The branch channels 122 are used to evenly distribute the silicone to the next stage of the pipeline.

[0041] like Figures 7-9As shown, the second oil-heated front panel 13 is provided with four second injection molding pipes 132 and an oil temperature pipe structure. The oil temperature pipe structure includes six third oil passage pipes 131. All six third oil passage pipes 131 pass through the second oil-heated front panel 13 in the second direction y. The six third oil passage pipes 131 are divided into two rows. The first row has four third oil passage pipes 131, which are connected to the four second injection molding pipes 132 respectively. The second row has two third oil passage pipes 131, which pass through the second oil-heated front panel 13 in the second direction y. The four second injection molding pipes 132 are used to install injection molding channels. The four third oil passage pipes 131 in the first row are used to directly heat the injection molding pipes to ensure the fluidity of the silicone. The four third oil passage pipes 131 in the second row are used to provide auxiliary heating for the panel itself to compensate for heat loss.

[0042] like Figures 10-13 As shown, the electric heating temperature control front panel 14 is provided with eight first heating tubes 141, four first temperature sensing needles 142, and four third injection molding pipes 143. The eight first heating tubes 141 are arranged linearly, with four first heating tubes 141 forming a group. The eight first heating tubes 141 penetrate the electric heating temperature control front panel 14 in the second direction y. The four first temperature sensing needles 142 are divided into two rows, with two first temperature sensing needles 142 in each row. The two rows of first temperature sensing needles 142 are located on the upper and lower sides of the eight first heating tubes 141, respectively. In the first direction x, the four third injection molding pipes 143 are located on the left and right sides of the two groups of first heating tubes 141, that is, every two third injection molding pipes 143 are located on both sides of a group of first heating tubes 141. The upper ends of the four third injection molding pipes 143 are connected to the lower ends of the four second injection molding pipes 132, and the lower ends of the four third injection molding pipes 143 are connected to the top of the core mold 3. The first heating element 141 uses resistance heating and can be precisely adjusted within ±0.5℃. The first temperature sensing needle 142 is used to monitor and provide feedback on the temperature in real time. The third injection pipe 143 is used to inject silicone into the cavity of the core mold 3.

[0043] like Figures 14-16As shown in Figures 19 and 20, the rear plate 23 of the electro-oil heating temperature control system is provided with four second heating elements 231, four second temperature sensing needles 232, and four fifth oil passage pipes 233. The four fifth oil passage pipes 233 are arranged linearly along the axial direction of the rear plate 23, with each pair of fifth oil passage pipes 233 forming a group, for a total of two groups. The two ends of the four fifth oil passage pipes 233 are respectively embedded in the front and rear ends of the rear plate 23, and the middle part of the four fifth oil passage pipes 233 is embedded in the core mold 3. The four second heating elements 231 are located on the outside of the two groups of fifth oil passage pipes 233, and the four second heating elements 231 are arranged linearly along the axial direction of the rear plate 23. Each second temperature sensing needle 232 is located between the second heating elements 231 and the fifth oil passage pipes 233, and the four second temperature sensing needles 232 are also arranged linearly along the axial direction of the rear plate 23. The second heating element 231 is used to supplement the heating capacity of the oil heating system. The second temperature sensor 232 is used to monitor the operating conditions and prevent overheating. The fifth oil circuit pipe 233 is used to circulate heat transfer oil through the core mold 3.

[0044] like Figure 17 As shown, each fifth oil passage pipe 233 includes two second inlet / outlet pipes 233a, two L-shaped pipes 233B, one second connecting pipe 233c, and three second heat-conducting ends 233d. The two second inlet / outlet pipes 233a are installed at the front and rear ends of the electric oil heating temperature control plate 23 and are connected to the outside. The two second inlet / outlet pipes 233a are connected to one end of each of the two L-shaped pipes 233B, and the other ends of each L-shaped pipe 233B are connected to both ends of the second connecting pipe 233c. The three second heat-conducting ends 233d are installed at the connection points between the L-shaped pipes 233B and the second connecting pipes 233c. The two second inlet / outlet pipes 233a, two L-shaped pipes 233B, and one second connecting pipe 233c are used to transport heated oil and introduce heat into the core mold 3 through the second heat-conducting ends 233d.

[0045] like Figure 18 , 19 As shown in Figure 20, the oil-heated temperature control back plate 22 is provided with four fourth oil passage pipes 221. The two ends of the four fourth oil passage pipes 221 are set on the oil-heated temperature control back plate 22 and connected to the outside. The middle part of the fourth oil passage pipe 221 is connected to the core mold 3. The fourth oil passage pipe 221 is used to introduce hot oil into the core mold 3.

[0046] like Figure 21As shown, each fourth oil passage pipe 221 includes two first inlet / outlet pipes 221a, two vertical pipes 221b, one first connecting pipe 221c, and one first heat-conducting end 221d. The two ends of the first connecting pipe 221c are connected to the two first inlet / outlet pipes 221a via the two vertical pipes 221b, respectively. The connection between the first connecting pipe 221c and the vertical pipes 221b is connected to the core mold 3 via the first heat-conducting end 221d. The two first inlet / outlet pipes 221a are respectively located at the front and rear ends of the oil-heated temperature control back plate 22 and are connected to the outside.

[0047] The above-described specific embodiments are preferred embodiments of this utility model and are not intended to limit this utility model. Any other changes or equivalent substitutions made without departing from the technical solution of this utility model are included within the protection scope of this utility model.

Claims

1. A heating device for silicone molding molds, characterized in that: The system includes a front mold (1), a rear mold (2), and a core mold (3). The front mold (1) includes an injection molding front plate (11), a first oil-heated front plate (12), a second oil-heated front plate (13), and an electric-heated front plate (14) connected in sequence. The rear mold (2) includes a support plate (21), an oil-heated rear plate (22), and an electric-oil-heated rear plate (23) connected in sequence. The two ends of the core mold (3) are respectively installed on the opposite surfaces of the electric-heated front plate (14) and the electric-oil-heated rear plate (23). The electric-heated front plate (14) and the electric-oil-heated rear plate (23) are matched with each other. The injection molding front plate (11) and the core mold (3) are connected in sequence. The injection molding front plate (11), the first oil-heated front plate (12) and the second oil-heated front plate (13) are all provided with oil temperature pipe structures. The electric heating front plate (14) is provided with a through first heating tube (141) and a first temperature sensing needle (142) located on the side of the first heating tube (141). The electric oil-heated rear plate (23) is provided with a second heating tube (231), a second temperature sensing needle (232) and a fifth oil circuit pipe (233). The second temperature sensing needle (232) is located between the second heating tube (231) and the fifth oil circuit pipe (233). The fifth oil circuit pipe (233) is connected to the core mold (3).

2. The silicone molding mold heating device according to claim 1, characterized in that: The injection front plate (11) is provided with a first injection channel (112) and a first oil pipe (111). The first injection channel (112) is vertically penetrating the injection front plate (11), and the first oil pipe (111) is horizontally arranged. The first oil pipe (111) intersects with the first injection channel (112), and the first injection channel (112) is connected to the core mold (3).

3. The silicone molding mold heating device according to claim 1, characterized in that: The first oil heating temperature control front plate (12) is provided with a horizontally penetrating second oil passage pipe (121).

4. The silicone molding mold heating device according to claim 1, characterized in that: The second oil heating temperature control front plate (13) is provided with a horizontally penetrating third oil pipe (131) and a vertically penetrating second injection channel (132), wherein the third oil pipe (131) intersects with the second injection channel (132).

5. The silicone molding mold heating device according to claim 1, characterized in that: The oil-heated temperature control plate (22) is provided with a fourth oil pipe (221), which is connected to the core mold (3).

6. The silicone molding mold heating device according to claim 5, characterized in that: The fourth oil circuit pipe (221) includes a first inlet / outlet pipe (221a), a vertical pipe (221b), a first connecting pipe (221c), and a first heat-conducting end (221d). The two ends of the first connecting pipe (221c) are respectively connected to the first inlet / outlet pipe (221a) through the vertical pipe (221b). The connection between the first connecting pipe (221c) and the vertical pipe (221b) is connected to the core mold (3) through the first heat-conducting end (221d). The first inlet / outlet pipe (221a) is disposed inside the oil-heated temperature control back plate (22).

7. The silicone molding mold heating device according to claim 1, characterized in that: The fifth oil circuit pipe (233) includes a second inlet / outlet pipe (233a), an L-shaped pipe (233b), a second connecting pipe (233c), and a second heat-conducting end (233d). The second connecting pipe (233c) is connected to the second inlet / outlet pipe (233a) through the L-shaped pipe (233b). The connection between the second connecting pipe (233c) and the L-shaped pipe (233b) is connected to the core mold (3) through the second heat-conducting end (233d).

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