Die assembly heating structure for PP plastic sheet production

Abstract

The utility model discloses a PP plastic sheet production die assembly heating structure which comprises a machining table, a lower die is installed on the top face of the machining table, supporting seats are installed at the four corners of the bottom face of the lower die, the lower die is erected on the top face of the machining table through the supporting seats, and a gap is directly reserved between the bottom face of the lower die and the top face of the machining table. The die assembly heating structure for PP plastic sheet production solves the problems that an existing electric heating sheet is high in temperature rising speed, the size of the existing electric heating sheet is consistent with that of the lower die, temperature rising can be achieved, but the heat dissipation effect is poor, and the heat dissipation efficiency is poor. The cooling forming time of the plastic sheet is delayed, and the processing efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PP plastic sheet processing, in particular to a die-closing heating structure for PP plastic sheet production. Background Art

[0002] PP plastic sheet is a sheet material made of polypropylene (abbreviation: PP). Due to its excellent physical and chemical properties, PP plastic is widely used in various industrial products. Because of its light weight, high strength, chemical corrosion resistance and other characteristics, PP plastic sheet plays an indispensable role in the processing of plastic products. For example, when manufacturing auto parts, household appliances, plastic furniture and various containers, PP plastic sheet is an important basic material. When die-closing processing PP plastic sheet, it is necessary to heat the lower die to avoid premature condensation when injecting fillers and make the filler filling have fluidity.

[0003] Currently, when die-closing heating is carried out, an electric heating sheet is attached to the bottom surface of the lower die to heat the lower die so that the filling material can be filled in a flowing state. After the filling is completed, heat insulation needs to be cut off immediately to avoid the problem that the subsequent plastic sheet cannot be cooled and formed. However, the electric heating sheet has a fast heating rate and the same size as the lower die, which can heat up but has poor heat dissipation effect, delaying the cooling and forming time of the plastic sheet and reducing the processing efficiency.

[0004] Therefore, it is necessary to provide a die-closing heating structure for PP plastic sheet production to solve the above technical problems. Summary of the Utility Model

[0005] In view of the above situation, to overcome the defects of the prior art, the utility model provides a die-closing heating structure for PP plastic sheet production to solve the problems that the current electric heating sheet has a fast heating rate, the same size as the lower die, can heat up but has poor heat dissipation effect, delaying the cooling and forming time of the plastic sheet and reducing the processing efficiency.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] A die-closing heating structure for PP plastic sheet production, comprising: a processing table;

[0008] The top surface of the processing table is provided with a lower die, and support seats are installed at the four corners of the bottom surface of the lower die. The lower die is erected on the top surface of the processing table through the support seats, and there is a gap between the bottom surface of the lower die and the top surface of the processing table. A heating mechanism is installed in the gap. An upper die is installed directly above the entire lower die. The top surface of the upper die is installed and connected with a hydraulic device, and the rear end of the hydraulic device is installed and connected with a mounting plate. The mounting plate is integrally in an L-shaped structure, and its bottom is bolted and installed on the top surface of the rear end of the processing table.

[0009] In one embodiment, support rods are installed on both sides of the upper mold. The support rods are integrally in an L-shaped structure, and a pressing rod is installed on the bottom surface of the vertical section. A plurality of the support rods and pressing rods are arranged at intervals.

[0010] In one embodiment, a heating groove is formed on the bottom surface of the lower mold. The heating groove is integrally in a semi-circular shape, and multiple groups of the heating grooves are arranged at intervals.

[0011] In one embodiment, the heating mechanism is composed of a fixing plate, a positioning plate, a connecting wire, an electric control box, a heating pipe, and a spring telescopic rod. Two fixing plates are arranged at intervals, and the two fixing plates are respectively arranged below both sides of the lower mold. A positioning plate is installed on the top surface of the fixing plate. The number and installation position of the positioning plates are the same as those of the pressing rods. A heating pipe is installed between the fixing plates. Multiple groups of the heating pipes are arranged at intervals. The top surface of the heating pipe is in contact with the heating groove. The heating pipe is electrically connected to the electric control box through the connecting wire. Spring telescopic rods are installed on both sides of the bottom surface of the fixing plate.

[0012] In one embodiment, a heat dissipation groove is formed at the heating groove. The heat dissipation groove is in a rectangular structure, and the heat dissipation groove and the heating groove are arranged in a cross shape.

[0013] The beneficial effects of the present utility model are as follows:

[0014] (1) When the upper mold and the lower mold of the present utility model are in an unoperated state, the electric control box is started to supply heat to the heating pipe, so that the heating pipe heats the lower mold through the heating groove. Before injecting the filling material, the electric control box is closed, the heat source of the heating pipe is turned off, the hydraulic device is started, the upper mold is driven to move downward, the pressing rod contacts the positioning plate, and continues to press downward, so that the fixing plate moves downward under the limit of the spring telescopic rod, and further the heating pipe is separated from the heating groove, so that the heating groove of the lower mold is exposed, and heat exchange is carried out with the natural wind of the outside world for heat dissipation. After the plastic plate is cooled and formed, the upper mold and the lower mold are separated, so that the heating pipe is reset in an unheated state and waits for the next processing and preheating.

[0015] (2) Due to the cross arrangement of the heat dissipation groove and the heating groove in the present utility model, after the heating groove is exposed, the heat dissipation groove is used for lateral auxiliary air intake and heat dissipation, which improves the heat dissipation efficiency of the lower mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structure diagram of the present utility model;

[0017] Figure 2 is the detailed diagram of each component of the present utility model after being disassembled;

[0018] Figure 3 is the detailed structure diagram of the upper mold of the present utility model;

[0019] Figure 4 This is a detailed view of the lower mold and the heating component of the present utility model.

[0020] Among them, the names corresponding to the reference numerals are: processing table 1, mounting plate 2, hydraulic device 3, upper mold 4, support rod 41, pressing rod 42, lower mold 5, heating groove 51, heat dissipation groove 52, heating mechanism 6, fixing plate 61, positioning plate 62, connecting wire 63, electric control box 64, heating tube 65, spring telescopic rod 66. Specific implementation manner

[0021] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. The implementation manners of the present utility model include but are not limited to the following embodiments.

[0022] As Figure 1 - Figure 2 shown, a die-closing heating structure for PP plastic sheet production provided by the present utility model includes: a processing table 1, a mounting plate 2, a hydraulic device 3, an upper mold 4, a lower mold 5, and a heating mechanism 6;

[0023] As Figure 1 - Figure 2 shown, the lower mold 5 is installed on the top surface of the processing table 1. Support seats are installed at the four corners of the bottom surface of the lower mold 5. The lower mold 5 is erected on the top surface of the processing table 1 through the support seats. There is a gap directly between the bottom surface of the lower mold 5 and the top surface of the processing table 1. A heating mechanism 6 is installed within the gap. An upper mold 4 is installed directly above the entire lower mold 5. The top surface of the upper mold 4 is installed and connected to the hydraulic device 3. The rear end of the hydraulic device 3 is installed and connected to the mounting plate 2. The mounting plate 2 is integrally in an L-shaped structure, and its bottom is bolted and installed to the top surface of the rear end of the processing table 1.

[0024] Preferably, in one embodiment, as Figure 3 shown, support rods 41 are installed on both sides of the upper mold 4. The support rods 41 are integrally in an L-shaped structure, and a pressing rod 42 is installed on the bottom surface of the vertical section thereof. A plurality of the support rods 41 and the pressing rods 42 are arranged at intervals.

[0025] Preferably, in one embodiment, as Figure 1 - Figure 4 shown, a heating groove 51 is formed on the bottom surface of the lower mold 5. The heating groove 51 is integrally in a semi-circular shape. A plurality of groups of the heating grooves 51 are arranged at intervals.

[0026] Preferably, in one embodiment, as Figure 2 、 Figure 4As shown, the heating mechanism 6 is composed of a fixed plate 61, a positioning plate 62, a connecting wire 63, an electric control box 64, a heating tube 65, and a spring telescopic rod 66. There are two fixed plates 61 arranged at intervals, and the two fixed plates 61 are respectively arranged below both sides of the lower mold 5. The top surface of the fixed plate 61 is provided with a positioning plate 62. The number and installation position of the positioning plates 62 are the same as those of the pressing rods 42. A heating tube 65 is installed between the fixed plates 61. There are multiple groups of heating tubes 65 arranged at intervals. The top surface of the heating tube 65 is attached to the heating groove 51. The heating tube 65 is electrically connected to the electric control box 64 through the connecting wire 63. Spring telescopic rods 66 are installed on both sides of the bottom surface of the fixed plate 61. During operation, when the upper mold 4 and the lower mold 5 are in a non-operating state, the electric control box 64 is started to supply heat to the heating tube 65, so that the heating tube 65 heats the lower mold 5 through the heating groove 51. Before starting to inject the filling material, the electric control box 64 is turned off, the heat source of the heating tube 65 is turned off, the hydraulic device 3 is started to drive the upper mold 4 to move downward, so that the pressing rod 42 contacts the positioning plate 62 and continues to press downward, so that the fixed plate 61 moves downward under the limit of the spring telescopic rod 66, and then the heating tube 65 is separated from the heating groove 51, so that the heating groove 51 of the lower mold 5 is in an exposed state and exchanges heat with the natural wind in the outside world for heat dissipation. After the plastic plate is cooled and formed, the upper mold 4 and the lower mold 5 are separated, so that the heating tube 65 is reset in a non-heated state and waits for the next processing and preheating.

[0027] Preferably, in one embodiment, as Figure 4 shown, a heat dissipation groove 52 is opened at the heating groove 51. The heat dissipation groove 52 has a rectangular structure, and the heat dissipation groove 52 and the heating groove 51 are arranged in a cross shape. After the heating groove 51 is exposed, the heat dissipation groove 52 performs lateral auxiliary air intake for heat dissipation to accelerate the heat dissipation efficiency of the lower mold 5.

[0028] The working principle of the present utility model:

[0029] During operation, when the upper mold 4 and the lower mold 5 are in a non-operating state, the electric control box 64 is started to supply heat to the heating tube 65, so that the heating tube 65 heats the lower mold 5 through the heating groove 51. Before starting to inject the filling material, the electric control box 64 is turned off, the heat source of the heating tube 65 is turned off, the hydraulic device 3 is started to drive the upper mold 4 to move downward, so that the pressing rod 42 contacts the positioning plate 62 and continues to press downward, so that the fixed plate 61 moves downward under the limit of the spring telescopic rod 66, and then the heating tube 65 is separated from the heating groove 51, so that the heating groove 51 of the lower mold 5 is in an exposed state and exchanges heat with the natural wind in the outside world for heat dissipation. After the plastic plate is cooled and formed, the upper mold 4 and the lower mold 5 are separated, so that the heating tube 65 is reset in a non-heated state and waits for the next processing and preheating.

[0030] The above embodiments are only one of the preferred embodiments of the present utility model and should not be used to limit the protection scope of the present utility model. Any meaningless modifications or polishings made on the main design concept and spirit of the present utility model, as long as the technical problems solved are still consistent with those of the present utility model, shall be included within the protection scope of the present utility model.

Claims

1. A mold-closing heating structure for the production of PP plastic sheets, characterized in that, Including: Processing table; A lower mold is installed on the top surface of the processing table. Support seats are installed at the four corners of the bottom surface of the lower mold. The lower mold is erected on the top surface of the processing table through the support seats. There is a gap directly between the bottom surface of the lower mold and the top surface of the processing table. A heating mechanism is installed in the gap. An upper mold is installed directly above the lower mold. The top surface of the upper mold is installed and connected to a hydraulic device. The rear end of the hydraulic device is installed and connected to a mounting plate. The mounting plate is integrally in an L-shaped structure, and its bottom is bolted and installed to the rear top surface of the processing table.

2. The clamping and heating structure for producing PP plastic sheets according to claim 1, characterized in that, Support rods are installed on both sides of the upper mold. The support rods are integrally in an L-shaped structure, and pressing rods are installed on the bottom surface of the vertical section thereof. Multiple support rods and pressing rods are arranged at intervals.

3. A mold clamping and heating structure for the production of PP plastic sheets according to claim 1, characterized in that, Heating grooves are formed on the bottom surface of the lower mold. The heating grooves are integrally in a semicircular shape. Multiple groups of heating grooves are arranged at intervals.

4. A die - closing and heating structure for the production of PP plastic sheets according to claim 1, characterized in that, The heating mechanism is composed of a fixing plate, a positioning plate, a connecting wire, an electric control box, a heating pipe, and a spring telescopic rod. Two fixing plates are arranged at intervals. The two fixing plates are respectively arranged below both sides of the lower mold. A positioning plate is installed on the top surface of the fixing plate. The number and installation position of the positioning plates are the same as those of the pressing rods. Heating pipes are installed between the fixing plates. Multiple groups of heating pipes are arranged at intervals. The top surface of the heating pipe is in contact with the heating groove. The heating pipe is electrically connected to the electric control box through the connecting wire. Spring telescopic rods are installed on both sides of the bottom surface of the fixing plate.

5. A mold clamping and heating structure for producing PP plastic sheets according to claim 3, characterized in that, Heat dissipation grooves are formed at the heating groove. The heat dissipation grooves are in a rectangular structure. The heat dissipation grooves and the heating grooves are arranged in a cross shape.

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