Demoulding device for foam plastic products

Abstract

The present invention relates to a demoulding device for foam plastic products, comprising a machine platform, wherein a lower mold and an upper mold driven by a hydraulic rod are arranged on the top of the machine platform, a mold groove is arranged on the top of the lower mold, wherein a bottom plate is arranged at the bottom of the mold groove, a medium cooling cavity I is arranged in the side wall of the bottom plate, multiple groups of screws are arranged at the bottom edge of the bottom plate, a screw tube sleeved on the screw rod is fixed at the bottom of the mold groove through a bearing, wherein a toothed disc is arranged on the screw tube, and gears meshing with the screw tube and driven by a motor are arranged between the multiple groups of toothed discs, a groove is also arranged on the side wall of the mold groove above the bottom plate, wherein a limit plate driven by an electric push rod is arranged in the groove, and a medium cooling box is arranged on the back of the limit plate, and a heating tube I is also arranged in the side wall of the limit plate, and a baffle extending to the outside of the mold groove is arranged at the top edge of the upper mold, wherein an injection tube is arranged on the baffle, and a medium cooling cavity II and a heating tube II are also arranged in the upper mold. The present invention has a simple structure and is easy to use.

Description

Technical Field

[0001] The invention relates to the field of foam plastic product production, in particular to a demoulding device for foam plastic products. Background Art

[0002] After the foam box is injection molded, it is difficult to demould the foam box because the foam box easily adheres to the inner wall of the mold. Manual demoulding is time-consuming and labor-intensive, thus affecting work efficiency.

[0003] For this purpose, there is a foam box demoulding device with patent number CN219583450U to solve the above problems. However, the device has the following defects when in use. The product after injection molding needs a long period of natural cooling before it can be taken out, which increases the processing time and affects the efficiency. At the same time, the demoulding plate moves upward to push the product so that its entire outer wall is separated from the inner wall of the mold and slides upward. Firstly, it is easy to generate high temperature and affect the quality of the product. Secondly, the product is separated from the mold groove over a large area at the same time, which easily causes its side wall to be torn and damaged, which also affects its quality. Summary of the invention

[0004] The purpose of the present invention is to provide a demoulding device for foam plastic products.

[0005] The technical problem of the present invention is mainly solved by the following technical solutions:

[0006] A demoulding device for foam plastic products comprises a machine platform, wherein a lower mold is arranged on the top of the machine platform, and an upper mold driven by a hydraulic rod is arranged above the machine platform, wherein the hydraulic rod is fixed on the frame:

[0007] A mold groove is provided at the top of the lower mold, wherein a bottom plate is provided at the bottom of the mold groove, and a medium cooling cavity I is provided in the side wall of the bottom plate, and multiple groups of screws are provided at the bottom edge of the bottom plate, and a screw tube sleeved on the screw rod is fixed at the bottom of the mold groove through a bearing, wherein a toothed disk is provided on the screw tube, and gears meshing with the screw tube are provided between the multiple groups of toothed disks, and the gears are driven by a motor, and a groove is also provided on the side wall of the mold groove above the bottom plate, wherein a limit plate driven by an electric push rod is provided in the groove, and a medium cooling box is provided on the back of the limit plate, and a heating tube I is also provided in the side wall of the limit plate, and a baffle extending to the outside of the mold groove is provided at the top edge of the upper mold, wherein an injection tube is provided on the baffle, and a medium cooling cavity II is also provided in the upper mold, wherein a heating tube II is also provided in the side wall of the upper mold outside the medium cooling cavity II.

[0008] Preferably, the medium cooling chamber I, the medium cooling box and the medium cooling chamber II are all connected to a cooling box storing coolant through corresponding hoses, wherein a pump is provided on the hose.

[0009] Preferably, the size of the limiting plate is adapted to the size of the groove, wherein the outer side wall of the limiting plate and the side wall corresponding to the mold groove are in the same vertical plane.

[0010] Preferably, the top open end of the mold cavity is provided with a circle of expansion portion for accommodating the baffle, wherein the injection pipe is located directly above the side wall of the mold cavity and the upper mold.

[0011] Preferably, the screw rods are screwed and fixed with corresponding screw tubes, wherein the number of the screw rods is four groups, and the multiple groups of screw rods are evenly arranged at four groups of top corner areas at the bottom of the base plate.

[0012] Preferably, the depth of the groove is greater than the sum of the thickness of the medium cooling box and the limiting plate.

[0013] The beneficial effects of the present invention are as follows: the present invention injects raw materials into the mold cavity through an injection pipe for injection molding. At this time, the heating tube I and the heating tube II can effectively increase the temperature in the mold cavity, so that the raw materials are fully dissolved before completing the molding work, so as to ensure the quality of the product after molding; and after the product is molded, the coolant is injected into the medium cooling cavity II. At this time, the cold air generated by it quickly cools the inner wall of the product through the upper mold, so that it is convenient for the subsequent upper mold to be drawn out from the product opening while fixing the molding, and then the coolant is injected into the medium cooling cavity I and the medium cooling box. In order to cool down the side walls and bottom walls of the product so as to fix and form them, the electric push rod subsequently drives the limit plate to slowly slide into the groove, thereby separating the limit plates from the outer walls of the product one by one to prevent severe friction between the two when the product is subsequently ejected from the mold groove. After the limit plate is separated from the outer wall of the product, the bonding area between the outer wall of the product and the side wall of the mold groove is small. Then, when the product is ejected for demolding by the bottom plate moving up and down, the product will not rub against the side wall of the mold groove over a large area during the process of ejecting, which can effectively reduce the chance of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 yes Figure 1 A partial enlarged view of .

[0016] In the figure: 1, machine table, 2, lower die, 3, upper die, 4, die groove, 5, bottom plate, 6, medium cooling chamber I, 7, screw, 8, screw tube, 9, bearing, 10, gear plate, 11, gear, 12, motor, 13, groove, 14, limit plate, 15, electric push rod, 16, medium cooling box, 17, heating tube I, 18, baffle, 19, injection tube, 20, medium cooling chamber II, 21, electric heating tube II, 22, expansion part. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0018] A demoulding device for foam plastic products comprises a machine platform 1, wherein a lower mold 2 is arranged on the top of the machine platform 1, and an upper mold 3 driven by a hydraulic rod is arranged above the machine platform 1, and the hydraulic rod is fixed on the frame:

[0019] A die groove 4 is provided at the top of the lower die 2, wherein a bottom plate 5 is provided at the bottom of the die groove 4, a medium cooling cavity 16 is provided in the side wall of the bottom plate 5, multiple groups of screws 7 are provided at the bottom edge of the bottom plate 5, a screw tube 8 sleeved on the screw 7 is fixed at the bottom of the die groove 4 through a bearing 9, wherein a toothed disc 10 is provided on the screw tube 8, and gears 11 meshing with the multiple groups of toothed discs 10 are provided between the multiple groups of toothed discs 10, and the gears 11 are driven by a motor 12, and a groove 13 is also provided on the side wall of the die groove 4 above the bottom plate 5, wherein a limit plate 14 driven by an electric push rod 15 is provided in the groove 13, and a medium cooling box 16 is provided on the back of the limit plate 14, and a heating tube 117 is also provided in the side wall of the limit plate 14;

[0020] A baffle 18 extending to the outside of the mold groove 4 is arranged at the top edge of the upper mold 3, wherein an injection pipe 19 is arranged on the baffle 18, and a circle of expansion part 22 for accommodating the baffle 18 is arranged at the top open end of the mold groove 4, and the injection pipe 19 is located directly above the side wall of the mold groove 4 and the upper mold 3, and a medium cooling cavity II20 is also arranged in the upper mold 3, wherein a heating tube II21 is also arranged in the side wall of the upper mold 3 outside the medium cooling cavity II20.

[0021] In this embodiment, the medium cooling chamber I6, the medium cooling box 16 and the medium cooling chamber II20 are all connected to a cooling box storing coolant through corresponding hoses, wherein a pump is provided on the hose.

[0022] In this embodiment, the size of the limiting plate 14 is adapted to the size of the groove 13 , wherein the outer side wall of the limiting plate 14 and the corresponding side wall of the mold groove 4 are in the same vertical plane.

[0023] In this embodiment, the screw rods 7 are screwed and fixed to the corresponding screw tubes 8 , wherein the number of the screw rods 7 is four groups, and the multiple groups of screw rods 7 are evenly arranged at four groups of top corner areas at the bottom of the bottom plate 5 .

[0024] In this embodiment, the depth of the groove 13 is greater than the sum of the thicknesses of the medium cooling box 16 and the limiting plate 14 .

[0025] like Figure 1 , 2As shown, the hydraulic rod drives the upper mold 3 to be embedded in the mold groove 4, wherein the baffle 18 slides into the opening of the expansion portion 22, and at this time, a mold cavity for product injection is formed between the baffle 18, the side wall of the mold groove 4 and the upper mold 3, wherein the raw material is injected into the mold cavity through the injection pipe 19 for injection molding, and at this time, the heating pipe I17 and the heating pipe II21 can effectively increase the temperature in the mold cavity, so that the raw material is fully dissolved before completing the molding work, so as to ensure the quality of the product after molding;

[0026] When the product needs to be taken out after it is formed, the heating tube I17 and the heating tube II21 are closed, and coolant is injected into the medium cooling chamber II20. At this time, the cold air generated by it quickly cools down the inner wall of the product through the upper mold 3, so that it can be fixed and formed, and it can also be convenient for the subsequent upper mold 3 to be pulled out from the product opening. Then, coolant is injected into the medium cooling chamber I6 and the medium cooling box 16 to cool down the side walls and bottom walls of the product to facilitate its fixed forming. Subsequently, the electric push rod 15 drives the limit plate 14 to slowly slide into the groove 13, so that the limit plate 14 is separated from the outer wall of the product one by one to prevent severe friction between the two when the product is subsequently ejected from the mold groove 4. After the limit plate 14 is separated from the outer wall of the product, the bonding area between the outer wall of the product and the side wall of the mold groove 4 is small. Then, when the product is ejected for demolding by the bottom plate 5 that moves up and down, the product is demolded when it is lifted up. During the demoulding process, there will be no large-scale friction with the side wall of the mold groove 4, which can effectively reduce the probability of damage. The operating steps for moving the bottom plate 5 are as follows: the motor 12 drives the gear 11 to drive the multiple sets of toothed discs 10 to rotate together, and the toothed discs 10 drive the screw tube 8 to rotate in the bearing 9 and on the screw 7, and then drive the screw 7 to drive the bottom plate 5 to move upward, so as to drive the product above the bottom plate 5 to slide out of the mold groove 4 to realize the demoulding work. In the above process, the bottom plate 5 is supported by the multiple sets of screws 7 to drive it to move up and down, preventing the bottom plate 5 from tilting or tilting during movement, and ensuring the stability and safety of the product during demoulding. In this embodiment, a receiving groove that can accommodate the corresponding hose is provided in the bottom wall of the mold groove 4 and the groove 13 to prevent the bottom plate 5 or the limit plate 14 from squeezing the corresponding hose during the movement or resetting process, or preventing the hose from pressing against the above components and affecting the movement or resetting of the limit plate 14 and the bottom plate 5.

[0027] The present invention is described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A demoulding device for foam plastic products, comprising a machine platform, wherein a lower mold is arranged on the top of the machine platform, and an upper mold driven by a hydraulic rod is arranged above the machine platform, wherein the hydraulic rod is fixed on the frame, characterized in that: A mold groove is provided at the top of the lower mold, wherein a bottom plate is provided at the bottom of the mold groove, and a medium cooling cavity I is provided in the side wall of the bottom plate, and multiple groups of screws are provided at the bottom edge of the bottom plate, and a screw tube sleeved on the screw rod is fixed at the bottom of the mold groove through a bearing, wherein a toothed disk is provided on the screw tube, and gears meshing with the screw tube are provided between the multiple groups of toothed disks, and the gears are driven by a motor, and a groove is also provided on the side wall of the mold groove above the bottom plate, wherein a limit plate driven by an electric push rod is provided in the groove, and a medium cooling box is provided on the back of the limit plate, and a heating tube I is also provided in the side wall of the limit plate, and a baffle extending to the outside of the mold groove is provided at the top edge of the upper mold, wherein an injection tube is provided on the baffle, and a medium cooling cavity II is also provided in the upper mold, wherein a heating tube II is also provided in the side wall of the upper mold outside the medium cooling cavity II.

2. A demoulding device for foam plastic products according to claim 1, characterized in that: The medium cooling chamber I, the medium cooling box and the medium cooling chamber II are all connected to a cooling box storing coolant through corresponding hoses, wherein a pump is provided on the hose.

3. A demoulding device for foam plastic products according to claim 1, characterized in that: The size of the limiting plate is adapted to the size of the groove, wherein the outer side wall of the limiting plate and the side wall corresponding to the mold groove are in the same vertical plane.

4. A demoulding device for foam plastic products according to claim 1, characterized in that: The top open end of the mold cavity is provided with a circle of expansion part for accommodating the baffle, wherein the injection pipe is located just above the side wall of the mold cavity and the upper mold.

5. The demoulding device for foam plastic products according to claim 1, characterized in that: The screw rods are screwed and fixed with corresponding screw tubes, wherein the number of the screw rods is four groups, and the multiple groups of screw rods are evenly arranged at four groups of top corner areas at the bottom of the bottom plate.

6. A demoulding device for foam plastic products according to claim 1, characterized in that: The depth of the groove is greater than the sum of the thickness of the medium cooling box and the limiting plate.

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