Traceless material returning mechanism of plastic mold

Abstract

The utility model discloses a traceless material returning mechanism of a plastic mould, which comprises a lower mould and an upper mould, base plates are fixedly arranged on one side of the lower mould and one side of the upper mould, a plurality of convex moulds and concave moulds are respectively fixed on the base plates, a plurality of mould cavities are arranged on the concave moulds, a first material returning plate is inserted on each convex mould, and a second material returning plate is inserted on each concave mould. A second material returning plate is arranged in each die cavity, a first moving mechanism capable of driving the second material returning plates to move upwards is arranged below the lower die, and a second moving mechanism capable of driving the first material returning plates to move downwards is arranged below the upper die. And third moving mechanisms capable of driving the second material returning plate to move downwards are arranged on the left side and the right side of the upper die, compared with the prior art, the situation that gravure is left on the surface of a product when the die is ejected out is avoided, and the quality of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a plastic mould technical field especially relates to a plastic mould traceless material withdrawing mechanism. BACKGROUND

[0002] Mold, industrial production is used to injection molding, blow molding, extrusion, die casting or forging pressure forming, smelting, stamping and other methods to get the desired products of various molds and tools; in short, mold is used to make the tool of the formed article, the tool is composed of various parts, and different molds are composed of different parts. It realizes the machining of the shape of the article mainly through the change of the physical state of the formed material; it is known as "the mother of industry".

[0003] When the product is prepared through the mold, although batch injection molding production can be carried out, it is more cumbersome when ejection, and the product is ejected through the existing ejector pin when the product is cooled, and when the adhesion between the product and the mold cavity is strong, it is not easy to eject, and the surface of the product will be left with concave printing due to the strength of the ejection, which is easy to affect the quality of the product. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a plastic mould traceless material withdrawing mechanism, which can solve at least one of the above technical problems, and the technical scheme of the utility model is as follows:

[0005] A plastic mould traceless material withdrawing mechanism, comprising: a lower mold and an upper mold, a pad is fixed on one side of the lower mold and the upper mold, a plurality of convex molds and concave molds are fixed on each pad, a plurality of mold cavities are arranged on the concave mold, a first material withdrawing plate is arranged on each convex mold, a second material withdrawing plate is arranged in each mold cavity, a first moving mechanism is arranged below the lower mold and can drive the second material withdrawing plate to move upwards, a second moving mechanism is arranged below the upper mold and can drive the first material withdrawing plate to move downwards, and a third moving mechanism is arranged on the left and right sides of the upper mold and can drive the second material withdrawing plate to move downwards.

[0006] Further, the first moving mechanism comprises a connecting rod fixedly connected below each second material withdrawing plate, a baffle is connected below each connecting rod, a through groove is arranged in the middle of the lower mold, a fixed seat is fixedly arranged below the concave mold in a symmetrical manner, a fixed block is fixedly arranged on the left and right sides of the baffle in a symmetrical manner, and a first spring is fixedly connected between each fixed seat and the adjacent fixed block.

[0007] Further, the second moving mechanism comprises an extension plate fixedly arranged on the front and back sides of each first material withdrawing plate, a plurality of clearance grooves are arranged on the front and back sides of one of the pads, and a second spring is fixed on each extension plate.

[0008] Further, the third moving mechanism comprises bases fixed symmetrically below the lower mold, a placing groove is arranged on each base, connecting grooves capable of communicating with the placing grooves are arranged on the left and right sides of the lower mold, the baffle is arranged in the adjacent placing groove on the left and right sides of the upper mold, and a pressing plate is fixed on the left and right sides of the upper mold.

[0009] Preferably, a conveying channel is arranged on each of the male mold, the upper mold and one of the backing plates, a conveying cavity is arranged on the upper mold, and a feeding port is arranged on the upper middle part of the conveying cavity.

[0010] Preferably, support seats are fixed on the front and back sides of the lower mold.

[0011] Preferably, guide columns are fixed on the left and right sides of the lower mold, and the left and right sides of the upper mold are inserted into the guide columns.

[0012] Therefore, the plastic mold traceless material withdrawing mechanism has the advantages that:

[0013] The plastic mold traceless material withdrawing mechanism is used, the upper mold is driven to move downwards by the hydraulic equipment, the upper mold drives the male mold to move towards the female mold, the second material withdrawing plate is pressed on the bottom of the mold cavity by the third moving mechanism, the male mold is covered on the mold cavity, hot melt plastic is conveyed between the male mold and the mold cavity by the external conveying equipment, the upper mold is reset upwards after the hot melt plastic is cooled and formed, the second material withdrawing plate is moved upwards by the first moving mechanism, the formed plastic is synchronously withdrawn upwards, the first material withdrawing plate is moved downwards by the second moving mechanism when the male mold is reset to the original position, the plastic adhered on the male mold is pushed downwards to complete the material withdrawing, compared with the prior art, the product surface is prevented from being left with concave marks when the mold is ejected, and the quality of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic view of the utility model.

[0015] Figure 2 It is a half-section schematic view of the utility model.

[0016] Figure 3 It is one of exploded schematic views of the utility model.

[0017] Figure 4 It is the second of exploded schematic views of the utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Lower mold; 2. Upper mold; 3. Backing plate; 4. Punch; 5. Die; 6. Mold cavity; 7. First ejector plate; 8. Second ejector plate; 100. First moving mechanism; 200. Second moving mechanism; 300. Third moving mechanism; 101. Connecting rod; 102. Baffle; 103. Through slot; 104. Fixed seat; 105. Fixed block; 106. First spring; 201. Extension plate; 202. Clearance slot; 203. Second spring; 301. Base; 302. Placement slot; 303. Connecting slot; 304. Lower pressure plate; 41. Conveying channel; 42. Conveying cavity; 43. Feed port; 11. Support seat; 12. Guide post. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] like Figures 1 to 4 The plastic mold seamless ejection mechanism shown is characterized by comprising: a lower mold 1 and an upper mold 2; support seats 11 are fixed on the front and rear sides of the lower mold 1; guide pillars 12 are fixed on the left and right sides of the lower mold 1; the left and right sides of the upper mold 2 are inserted into the guide pillars 12; a pad 3 is installed and fixed on one side of both the lower mold 1 and the upper mold 2; a plurality of punches 4 and dies 5 are fixed on each of the pads 3; a plurality of mold cavities 6 are provided on each die 5; a first ejection plate 7 is inserted into each of the punches 4; a second ejection plate 8 is provided in each of the mold cavities 6; a first moving mechanism 100 is provided below the lower mold 1 to drive the second ejection plate 8 to move upward; a second moving mechanism 200 is provided below the upper mold 2 to drive the first ejection plate 7 to move downward; and a third moving mechanism 300 is provided on the left and right sides of the upper mold 2 to drive the second ejection plate 8 to move downward.

[0021] The above-described plastic mold ejection mechanism, when in use, uses hydraulic equipment to move the upper mold 2 downwards, causing the upper mold 2 to move the punch 4 towards the die 5. At this time, the third moving mechanism 300 presses the second ejection plate 8 against the bottom of the mold cavity 6, so that the punch 4 covers the mold cavity 6. At this time, hot melt plastic is conveyed between the punch 4 and the mold cavity 6 through an external conveying device. After the hot melt plastic cools and solidifies, the upper mold 2 returns to its original position. At this time, the first moving mechanism 100 moves the second ejection plate 8 upwards, synchronously ejecting the solidified plastic upwards. When the punch 4 returns to its original position, the second moving mechanism 200 moves the first ejection plate 7 downwards, pushing the plastic adhered to the punch 4 downwards to complete the ejection. Compared with the prior art, this avoids leaving indentations on the product surface when the mold is ejected, thus improving product quality.

[0022] like Figure 3As shown, in some embodiments of this utility model, the first moving mechanism 100 includes connecting rods 101 fixedly connected below each of the second ejector plates 8, a baffle 102 connected below each of the connecting rods 101, a through groove 103 provided in the middle of the lower mold 1, a fixed seat 104 symmetrically fixed below the concave mold 5, and fixed blocks 105 symmetrically fixed on the left and right sides of the baffle 102. A first spring 106 is fixedly connected between each fixed seat 104 and the adjacent fixed block 105. When the punch 4 moves upward, the first spring 106 on the fixed block 105 pushes the fixed seat 104 upward. At this time, the fixed seat 104 drives the baffle 102 to move upward, the baffle 102 drives each connecting rod 101 to move, and the second ejector plates 8 on each connecting rod 101 push the product upward. The product is continuously pushed onto the punch 4.

[0023] like Figure 3 As shown, in some embodiments of this utility model, the second moving mechanism 200 includes extension plates 201 fixed on the front and rear sides of each first ejector plate 7. Multiple clearance grooves 202 are provided on the front and rear sides of one of the pads 3. A second spring 203 is fixed on each of the extension plates 201. When it is reset to its original position, the extension plate 201 is driven to move downward by the second spring 203 fixed on the extension plate 201. At this time, the extension plate 201 drives the first ejector plate 7 to move downward.

[0024] like Figure 3 As shown, in some embodiments of this utility model, the third moving mechanism 300 includes a base 301 symmetrically fixed below the lower mold 1, a placement groove 302 is provided on each of the bases 301, and a connecting groove 303 that can communicate with the placement groove 302 is provided on the left and right sides of the lower mold 1. The baffle 102 is disposed in the adjacent placement groove 302 on the left and right sides. A lower pressure plate 304 is fixed on the left and right sides of the upper mold 2. When the upper mold 4 moves downward, it drives the lower pressure plate 304 to move downward. Then the lower pressure plate 304 is inserted and moved in the connecting groove 303, so that the lower pressure plate 304 moves in the placement groove 302. At this time, the lower pressure plate 304 contacts the baffle 102, so that the baffle 102 moves below the placement groove 302.

[0025] like Figure 3 As shown, in some embodiments of this utility model, a conveying channel 41 is provided on each of the punches 4, the upper mold 2 and one of the pads 3. A conveying cavity 42 is provided on the upper mold 2. An inlet 43 is provided in the middle of the upper part of the conveying cavity 42. An external conveying device, called the hot-melted plastic, is conveyed into the conveying cavity 42 through the inlet 43. At this time, the plastic is conveyed to each conveying channel 41 along with the conveying cavity 42, so that the plastic is conveyed between the punch 4 and the mold cavity 6.

[0026] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed for protection. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A plastic mold non-marking material ejection mechanism characterized by, The utility model relates to a die set, including: Lower mould (1) and upper mould (2), both sides of lower mould (1) and upper mould (2) are fixedly installed with backing plate (3), a plurality of male moulds (4) and female moulds (5) are fixed on each backing plate (3) respectively, a plurality of mould cavities (6) are equipped on female mould (5), first material return plate (7) is inserted and is equipped on each male mould (4), second material return plate (8) is equipped in each mould cavity (6), first moving mechanism (100) that can drive second material return plate (8) to move upwards is equipped below lower mould (1), second moving mechanism (200) that can drive first material return plate (7) to move downwards is equipped below upper mould (2), third moving mechanism (300) that can drive second material return plate (8) to move downwards is equipped in the left and right sides of upper mould (2).

2. A plastic mold non-marking material ejection mechanism according to claim 1, characterized in that First moving mechanism (100) includes connecting rod (101) that is fixedly connected below each second material return plate (8), baffle (102) is connected and is equipped below each connecting rod (101), through groove (103) is equipped in the middle of lower mould (1), fixed seat (104) is fixedly equipped below female mould (5) symmetrically, fixed block (105) is fixedly equipped on the left and right sides of baffle (102) symmetrically, first spring (106) is fixedly connected between each fixed seat (104) and adjacent fixed block (105).

3. A plastic mold non-marking material ejection mechanism according to claim 1, characterized in that Second moving mechanism (200) includes extension plate (201) that is fixed on the front and rear sides of each first material return plate (7), a plurality of emptying grooves (202) are equipped on the front and rear sides of one backing plate (3), second spring (203) is fixed on each extension plate (201).

4. A plastic mold non-marking material ejection mechanism according to claim 2, characterized in that Third moving mechanism (300) includes base (301) that is fixed below lower mould (1) symmetrically, placing groove (302) is equipped on each base (301), connecting groove (303) that can communicate with placing groove (302) is equipped on the left and right sides of lower mould (1), baffle (102) is arranged in adjacent placing groove (302) on the left and right sides, and lower pressing plate (304) is fixed on the left and right sides of upper mould (2).

5. A plastic mold non-marking material ejection mechanism according to claim 1, wherein Conveying channel (41) is equipped on each male mould (4), upper mould (2) and one backing plate (3), conveying cavity (42) is equipped above upper mould (2), and feeding port (43) is communicated and equipped in the upper middle part of conveying cavity (42).

6. A plastic mold non-marking material ejection mechanism according to claim 1, wherein Supporting seat (11) is fixed on the front and rear sides of lower mould (1).

7. A plastic mold non-marking material ejection mechanism according to claim 1, wherein Guide column (12) is fixed on the left and right sides of lower mould (1), and upper mould (2) is inserted on guide column (12) on the left and right sides.

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