PVC plate forming die

Abstract

The invention discloses a PVC plate forming die, and relates to the technical field of dies, the PVC plate forming die comprises an upper die, a lower die and a temperature control unit, the upper die comprises an upper die main body, a driving mechanism and a detachably connected upper die opening block, the upper die opening block and the upper die main body can be in sliding fit in the vertical direction, and a forming cavity is located between the upper die opening block and the lower die; the temperature control unit is provided with a mold temperature control machine, a thermocouple, a first heat exchange runner of the upper mold orifice block and a second heat exchange runner of the lower mold, the thermocouple is used for measuring the temperature of a forming cavity and is in signal connection with the control machine, and first and second electric heating plates and first and second electric heating rods are also arranged for assisting temperature control; the mold can effectively solve the problems that a traditional mold is difficult to manufacture thick PVC plates and raw materials are prone to flowing out of a mold opening too early, the product forming quality and the production efficiency are improved through accurate temperature control and flexible adjustment, the structure is stable, maintenance is convenient, the requirements of multiple fields for the thick PVC plates can be met, and industry development is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, in particular to a PVC plate forming mould. Background Art

[0002] In many fields such as construction and decoration, PVC sheets are widely used because of their good chemical stability, corrosion resistance, insulation and relatively low cost. Traditional PVC sheet forming molds have played an important role in long-term production practice, but they also have obvious limitations.

[0003] At present, the thickness of PVC sheets made by traditional molds on the market is usually limited to a relatively thin range of 3-15mm. With the development of the industry and the needs of some special application scenarios, the demand for thicker PVC sheets is growing. For example, in the protective shells of some large industrial equipment, load-bearing components of buildings with special structures, PVC sheets with a thickness of more than 15mm are required to meet their strength, stability and other performance requirements. However, due to the inherent characteristics of their structural design and process parameters, traditional molds will face many problems if they are forcibly used to manufacture thicker PVC sheets. One of the key problems is that during the sheet forming process, the PVC molten raw material flows out through the die before it is fully solidified and formed. This situation not only leads to the inability to obtain qualified thick PVC sheet products, but also causes a large amount of waste of raw materials, a significant reduction in production efficiency and an unnecessary increase in production costs, which seriously restricts the application expansion of PVC sheets in a wider range of fields and the further development of the industry.

[0004] Therefore, there is an urgent need for a new type of PVC sheet forming mold that can effectively solve the above problems to meet the production needs of PVC sheets of different thicknesses, especially thick PVC sheets, improve production efficiency and product quality, reduce production costs, and promote technological progress in PVC sheet related industries. Summary of the invention

[0005] The object of the present invention is to provide a PVC sheet forming die to solve the problems existing in the above-mentioned prior art and increase the thickness of the formed PVC sheet.

[0006] To achieve the above object, the present invention provides the following solutions: The present invention provides a PVC sheet forming mold, comprising an upper mold, a lower mold and a temperature control unit, wherein a distribution flow channel and a forming cavity are formed between the upper mold and the lower mold, a feed hole of the forming mold is connected with a feed end of the distribution flow channel, a discharge end of the distribution flow channel is connected with a feed end of the forming cavity, and a die opening of the forming mold is a discharge end of the forming cavity; The upper die comprises an upper die body, a driving mechanism and an upper die block detachably connected to the upper die body, the upper die block is closer to the die opening than the upper die body, and the upper die block and the upper die body are slidably matched in the vertical direction, the driving mechanism is used to drive the upper die block to rise and fall relative to the upper die body, and the molding cavity is entirely located between the upper die block and the lower die; The temperature control unit includes a mold temperature controller, a thermocouple, a plurality of first heat exchange channels arranged in the upper mold block, and a plurality of second heat exchange channels arranged in the lower mold, wherein the first heat exchange channel and the second heat exchange channel are both close to the mold opening, and one end of the first heat exchange channel and the second heat exchange channel are connected to the liquid outlet of the mold temperature controller and the other end is connected to the liquid return port of the mold temperature controller; the thermocouple is used to measure the temperature of the molding cavity, and the thermocouple is connected to the temperature controller signal in the mold temperature controller.

[0007] Preferably, it also includes a first electric heating plate and a second electric heating plate, the first electric heating plate is attached to the surface of the upper mold block, the second electric heating plate is attached to the surface of the lower mold, and the first electric heating plate and the second electric heating plate are both close to the mold.

[0008] Preferably, the temperature sensor in the first electric heating plate and the temperature sensor in the second electric heating plate are respectively connected to the temperature controller signal in the mold temperature controller, and the first electric heating plate and the second electric heating plate are both controlled by the temperature controller in the mold temperature controller.

[0009] Preferably, it also includes a plurality of first electric heating rods arranged in the upper mold block and a plurality of second electric heating rods arranged in the lower mold; the first electric heating rod is located above the molding cavity and is farther away from the mold opening than the first heat exchange channel, and the second electric heating rod is located below the molding cavity and is farther away from the mold opening than the second heat exchange channel.

[0010] Preferably, the first electric heating rod and the second electric heating rod are both controlled by a temperature controller in the mold temperature controller.

[0011] Preferably, the driving mechanism includes a fixed plate fixedly connected to the upper mold body, the fixed plate is located above the upper mold mouth block, and at least two vertical first threaded holes are provided on the fixed plate, each of the first threaded holes is connected to a first bolt, and the bottom end of each first bolt is threadedly connected to the upper mold mouth block.

[0012] Preferably, the upper die block is connected to the upper die body through a plurality of horizontally arranged second bolts, and all the second bolts are spaced apart in the horizontal direction; the upper die block is provided with a vertical long hole corresponding to each of the second bolts; The second bolt passes through the corresponding long hole and is slidably matched with the corresponding long hole in the vertical direction and limitedly matched with the corresponding long hole in the horizontal direction.

[0013] Preferably, all of the first heat exchange channels are distributed at intervals in the horizontal direction, and all of the second heat exchange channels are distributed at intervals in the horizontal direction.

[0014] Preferably, all of the first electric heating rods are distributed at intervals in the horizontal direction, and all of the second electric heating rods are distributed at intervals in the horizontal direction.

[0015] Preferably, there are two of each of the first heat exchange channel, the second heat exchange channel, the first electric heating rod and the second electric heating rod.

[0016] Compared with the prior art, the present invention has achieved the following technical effects: The mold temperature controller, thermocouple, and the first heat exchange flow channel arranged in the upper die block and the second heat exchange flow channel of the lower die in the temperature control unit of the PVC sheet forming mold of the present invention cooperate with each other to accurately measure and control the temperature of the forming cavity. Through the precise control of the temperature, it can ensure that the PVC molten raw material is solidified and formed in the mold according to the expected state, effectively avoiding the problem of premature flow of the raw material out of the die due to temperature inappropriateness, thereby improving the molding quality of the product and reducing the defective rate.

[0017] Furthermore, the first and second electric heating plates are respectively attached to the upper die block and the lower die surface and close to the die, and the first electric heating rod is located above the molding cavity and the second electric heating rod is located below, which further enriches the heating methods of the mold. These heating components are controlled by the temperature controller in the mold temperature control machine, and can flexibly adjust the heating intensity and area according to different production process requirements, so that the temperature distribution inside the mold is more uniform, which is conducive to the molding of thick plates and also helps to improve production efficiency.

[0018] Furthermore, the upper die block and the upper die body are driven to rise and fall relative to each other through the first bolt on the fixed plate, and the horizontally arranged second bolt cooperates with the long hole to realize horizontal limiting and vertical sliding cooperation. This connection method not only ensures the stability of the upper die block during the lifting process, and ensures that the thickness of the molding cavity can be adjusted, thereby facilitating the adjustment of the thickness of the molded PVC sheet; it is also convenient for the disassembly and maintenance of the upper die block. When the mold is partially worn or fails, it can be quickly replaced or repaired, which reduces the maintenance cost and downtime of the equipment and improves the continuity and reliability of the overall production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the PVC sheet forming mold of the present invention; Figure 2 It is a cross-sectional view of the PVC sheet forming mold of the present invention; Figure 3 It is a rear view of the PVC sheet forming mold of the present invention; In the figure: 1. upper mold body; 2. lower mold; 3. distribution channel; 4. molding cavity; 5. feed hole; 6. upper mold mouth block; 7. fixing plate; 8. first bolt; 9. thermocouple; 10. first heat exchange channel; 11. second heat exchange channel; 12. first electric heating plate; 13. second electric heating plate; 14. first electric heating rod; 15. second electric heating rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The object of the present invention is to provide a PVC sheet forming die to solve the problems existing in the above-mentioned prior art and increase the thickness of the formed PVC sheet.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 3 As shown, this embodiment provides a PVC sheet forming mold, including an upper mold, a lower mold 2 and a temperature control unit, a distribution channel 3 and a forming cavity 4 are formed between the upper mold and the lower mold 2, a feed hole 5 of the forming mold is connected to the feed end of the distribution channel 3, and the discharge end of the distribution channel 3 is connected to the feed end of the forming cavity 4, and the die opening of the forming mold is the discharge end of the forming cavity 4; The upper die includes an upper die body 1, a driving mechanism and an upper die block 6 detachably connected to the upper die body 1, the upper die block 6 is closer to the die opening than the upper die body 1, and the upper die block 6 and the upper die body 1 are slidably matched in the vertical direction, the driving mechanism is used to drive the upper die block 6 to rise and fall relative to the upper die body 1, and the molding cavity 4 is entirely located between the upper die block 6 and the lower die 2; The temperature control unit includes a mold temperature controller, a thermocouple 9, a plurality of first heat exchange channels 10 arranged in the upper mold block 6, and a plurality of second heat exchange channels 11 arranged in the lower mold 2. The first heat exchange channels 10 and the second heat exchange channels 11 are both close to the mold opening. One end of the first heat exchange channel 10 and the second heat exchange channel 11 are connected to the liquid outlet of the mold temperature controller and the other end is connected to the liquid return port of the mold temperature controller; the thermocouple 9 is used to measure the temperature of the molding cavity 4, and the thermocouple 9 is connected to the temperature controller signal in the mold temperature controller.

[0025] The mold temperature controller, thermocouple 9, first heat exchange channel 10 provided in upper die block 6, and second heat exchange channel 11 in lower die 2 in the temperature control unit of the PVC sheet forming mold of this embodiment cooperate with each other to accurately measure and control the temperature of the forming cavity 4. By accurately controlling the temperature, it can ensure that the PVC molten raw material is solidified and formed in the mold in the expected state, effectively avoiding the problem of premature flow of raw materials out of the die due to inappropriate temperature, thereby improving the molding quality of the product and reducing the defective rate.

[0026] In the optional scheme of this embodiment, it is more preferred to further include a first electric heating plate 12 and a second electric heating plate 13, the first electric heating plate 12 is attached to the surface of the upper mold block 6, the second electric heating plate 13 is attached to the surface of the lower mold 2, and the first electric heating plate 12 and the second electric heating plate 13 are both close to the mold.

[0027] In addition, the temperature sensor in the first electric heating plate 12 and the temperature sensor in the second electric heating plate 13 are respectively connected to the temperature controller signal in the mold temperature controller, and the first electric heating plate 12 and the second electric heating plate 13 are both controlled by the temperature controller in the mold temperature controller.

[0028] In the optional scheme of this embodiment, it is more preferred to further include a plurality of first electric heating rods 14 arranged in the upper mold block 6 and a plurality of second electric heating rods 15 arranged in the lower mold 2; the first electric heating rod 14 is located above the molding cavity 4 and is farther away from the mold opening than the first heat exchange channel 10, and the second electric heating rod 15 is located below the molding cavity 4 and is farther away from the mold opening than the second heat exchange channel 11; the first electric heating rod 14 and the second electric heating rod 15 are both controlled by the temperature controller in the mold temperature controller.

[0029] The first electric heating plate 12 and the second electric heating plate 13 provided in this embodiment are respectively attached to the upper die block 6 and the surface of the lower die 2 and close to the die opening, and the first electric heating rod 14 above the molding cavity 4 and the second electric heating rod 15 below it further enrich the heating method of the mold. These heating components are all controlled by the temperature controller in the mold temperature controller, which can flexibly adjust the heating intensity and area according to different production process requirements, so that the temperature distribution inside the mold is more uniform, which is conducive to the molding of thick plates and also helps to improve production efficiency.

[0030] In the optional scheme of this embodiment, it is more preferred that the driving mechanism includes a fixing plate 7 fixedly connected to the upper die body 1, the fixing plate 7 is located above the upper die block 6, and at least two vertical first threaded holes are provided on the fixing plate 7, each of which is connected to a first bolt 8, and the bottom end of each first bolt 8 is threadedly connected to the upper die block 6. The lifting movement of the upper die block 6 can be achieved by screwing the first bolt 8 on the fixing plate 7.

[0031] The connection structure between the upper die block 6 and the upper die body 1 is specifically as follows: The upper die block 6 is connected to the upper die body 1 through a plurality of horizontally arranged second bolts, and all the second bolts are spaced apart in the horizontal direction; the upper die block 6 is provided with a vertical long hole corresponding to each second bolt; the second bolt passes through the corresponding long hole, and slides with the corresponding long hole in the vertical direction and limits the position in the horizontal direction.

[0032] The upper die block 6 and the upper die body 1 are driven to rise and fall relative to each other through the first bolt 8 on the fixed plate 7, and the horizontally arranged second bolt cooperates with the long hole to realize horizontal limit and vertical sliding cooperation. This connection method not only ensures the stability of the upper die block 6 during the lifting process, and ensures that the thickness of the molding cavity 4 can be adjusted, thereby facilitating the adjustment of the thickness of the molded PVC sheet; it is also convenient for the disassembly and maintenance of the upper die block 6. When the mold is partially worn or fails, it can be quickly replaced or repaired, which reduces the maintenance cost and downtime of the equipment and improves the continuity and reliability of the overall production.

[0033] In the optional scheme of this embodiment, it is more preferred that all the first heat exchange channels 10 are distributed at intervals in the horizontal direction, and all the second heat exchange channels 11 are distributed at intervals in the horizontal direction; all the first electric heating rods 14 are distributed at intervals in the horizontal direction, and all the second electric heating rods 15 are distributed at intervals in the horizontal direction.

[0034] In this embodiment, there are two first heat exchange channels 10, two second heat exchange channels 11, two first electric heating rods 14 and two second electric heating rods 15; it is worth noting that, in actual applications, the number of the first heat exchange channels 10, the second heat exchange channels 11, the first electric heating rods 14 and the second electric heating rods 15 can be adaptively adjusted as needed.

[0035] The PVC sheet forming mold of the present embodiment controls the temperature of the upper and lower dies 2 near the die opening through a temperature control unit. By lowering the temperature of the upper and lower dies 2 near the die opening, the PVC molten material near the die opening in the forming cavity 4 can be cooled faster, thereby increasing the flow resistance of the PVC molten material in the forming cavity 4, so that the PVC molten material can fill the entire forming cavity 4, thereby completing the forming of a sheet with a larger thickness.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A PVC sheet forming mold, characterized in that: The mold comprises an upper mold, a lower mold and a temperature control unit, wherein a distribution channel and a molding cavity are formed between the upper mold and the lower mold, the feed hole of the molding mold is connected with the feed end of the distribution channel, the discharge end of the distribution channel is connected with the feed end of the molding cavity, and the die opening of the molding mold is the discharge end of the molding cavity; The upper die comprises an upper die body, a driving mechanism and an upper die block detachably connected to the upper die body, the upper die block is closer to the die opening than the upper die body, and the upper die block and the upper die body are slidably matched in the vertical direction, the driving mechanism is used to drive the upper die block to rise and fall relative to the upper die body, and the molding cavity is entirely located between the upper die block and the lower die; The temperature control unit includes a mold temperature controller, a thermocouple, a plurality of first heat exchange channels arranged in the upper mold block, and a plurality of second heat exchange channels arranged in the lower mold, wherein the first heat exchange channel and the second heat exchange channel are both close to the mold opening, and one end of the first heat exchange channel and the second heat exchange channel are connected to the liquid outlet of the mold temperature controller and the other end is connected to the liquid return port of the mold temperature controller; the thermocouple is used to measure the temperature of the molding cavity, and the thermocouple is connected to the temperature controller signal in the mold temperature controller.

2. The PVC sheet forming mold according to claim 1, characterized in that: It also includes a first electric heating plate and a second electric heating plate, wherein the first electric heating plate is attached to the surface of the upper die block, and the second electric heating plate is attached to the surface of the lower die, and both the first electric heating plate and the second electric heating plate are close to the die.

3. The PVC sheet forming mold according to claim 2, characterized in that: The temperature sensor in the first electric heating plate and the temperature sensor in the second electric heating plate are respectively connected to the temperature controller signal in the mold temperature controller, and the first electric heating plate and the second electric heating plate are both controlled by the temperature controller in the mold temperature controller.

4. The PVC sheet forming mold according to claim 1, characterized in that: It also includes a plurality of first electric heating rods arranged in the upper mold block and a plurality of second electric heating rods arranged in the lower mold; the first electric heating rod is located above the molding cavity and is farther away from the mold than the first heat exchange channel, and the second electric heating rod is located below the molding cavity and is farther away from the mold than the second heat exchange channel.

5. The PVC sheet forming mold according to claim 4, characterized in that: The first electric heating rod and the second electric heating rod are both controlled by a temperature controller in the mold temperature control machine.

6. The PVC sheet forming mold according to claim 1, characterized in that: The driving mechanism includes a fixing plate fixedly connected to the upper mold body, the fixing plate is located above the upper mold mouth block, and at least two vertical first threaded holes are provided on the fixing plate, each of the first threaded holes is connected to a first bolt, and the bottom end of each first bolt is threadedly connected to the upper mold mouth block.

7. The PVC sheet forming mold according to claim 1, characterized in that: The upper die block is connected to the upper die body through a plurality of horizontally arranged second bolts, and all the second bolts are spaced apart in the horizontal direction; the upper die block is provided with a vertical long hole corresponding to each of the second bolts; The second bolt passes through the corresponding long hole and is slidably matched with the corresponding long hole in the vertical direction and limitedly matched with the corresponding long hole in the horizontal direction.

8. The PVC sheet forming mold according to claim 4, characterized in that: All of the first heat exchange channels are distributed at intervals in the horizontal direction, and all of the second heat exchange channels are distributed at intervals in the horizontal direction.

9. The PVC sheet forming mold according to claim 8, characterized in that: All of the first electric heating rods are distributed at intervals in the horizontal direction, and all of the second electric heating rods are distributed at intervals in the horizontal direction.

10. The PVC sheet forming mold according to claim 9, characterized in that: There are two of each of the first heat exchange channel, the second heat exchange channel, the first electric heating rod and the second electric heating rod.

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