A preform top-ram mechanism and a molding die

Abstract

The application relates to the technical field of injection molding, and provides a pre-placed part clamping mechanism, which comprises an inclined ejector block, a core-pulling mechanism is arranged on the inclined ejector block in a sliding mode, a driving cylinder for driving the core-pulling mechanism to slide relative to the inclined ejector block is further arranged on the inclined ejector block, and the driving cylinder is configured to drive the core-pulling mechanism to retreat and form a placing cavity between the core-pulling mechanism and the inclined ejector block, the pre-placed part is placed into the placing cavity, the core-pulling mechanism is driven to advance and press the pre-placed part against the inclined ejector block. Therefore, the application forms a cavity between the core-pulling mechanism and the inclined ejector block through core-pulling retreat, the pre-placed part is placed into the cavity, the core-pulling mechanism is then advanced and presses the pre-placed part against the inclined ejector block, and the pre-placed part is fixed in a mold before mold clamping. The application provides a forming mold with the pre-placed part clamping mechanism.

Description

Technical Field

[0001] This invention belongs to the field of injection molding technology, and particularly relates to a pre-positioned part clamping mechanism and a molding die. Background Technology

[0002] Based on their intended use, some injection molded products have pre-installed parts that need to be placed in the mold before molding. After injection molding, the pre-installed parts are integrated with the product.

[0003] For prefabricated components with special structures, such as Figure 7 The fabric 200 shown has a folded area 201. The fabric 200 forms a two-, three-, or four-fold structure in the folded area 201. If the fabric 200 is simply placed in the mold, the folded area 201 will be loose due to the material's own elasticity, affecting the quality of the injection molding. Existing injection molds cannot effectively fix this type of pre-formed part, limiting product production.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention primarily provides a pre-position clamping mechanism, which solves the technical problem that pre-positions cannot be fixed on the mold.

[0006] To solve the above problems, the present invention provides a pre-positioned component clamping mechanism, including an inclined top block, on which a core-pulling device is slidably disposed;

[0007] The inclined top block is also equipped with a drive cylinder for driving the core puller to slide relative to the inclined top block;

[0008] The drive cylinder is configured to drive the core puller to retract and form a storage cavity between itself and the inclined top block, place the pre-positioned part into the storage cavity, and then drive the core puller to advance and squeeze the pre-positioned part against the inclined top block.

[0009] According to the pre-set component tightening mechanism of the present invention, a clearance cavity is provided on the inclined top block; the core puller is slidably disposed in the clearance cavity.

[0010] According to the pre-set component clamping mechanism of the present invention, sliding grooves are provided on both opposite side walls of the relief cavity, and sliding strips that slide in cooperation with the sliding grooves are provided on both sides of the core pulling.

[0011] According to the pre-set component clamping mechanism of the present invention, two limiting blocks for limiting the core pulling stroke are fixed on the inclined top block, and two travel switches that respectively cooperate with the limiting blocks on the opposite side are provided on the core pulling.

[0012] According to the pre-set component clamping mechanism of the present invention, the limit switch is a proximity switch or a contact switch.

[0013] According to the pre-position clamping mechanism of the present invention, the driving cylinder is a hydraulic cylinder or an electric cylinder.

[0014] A molding die includes a movable die and a fixed die; the movable die is equipped with the pre-placed part clamping mechanism.

[0015] A moving template is provided on one side of the moving mold, and a reciprocating push plate is provided between the moving template and the moving mold; the inclined push block of the pre-positioned part clamping mechanism is fixedly connected to the inclined push rod; the inclined push rod sequentially moves through the moving mold and the push plate.

[0016] According to the pre-set component clamping mechanism of the present invention, an auxiliary rod is also provided parallel to the inclined ejector rod; a reinforcing plate is fixed on the moving mold; the inclined ejector rod and the auxiliary rod are both slidably connected to the reinforcing plate.

[0017] According to the pre-set component clamping mechanism of the present invention, a sliding groove component is fixedly provided inside the push plate, and a guide block is provided inside the sliding groove component; a guide groove is provided on the inner wall of the sliding groove component to slide and cooperate with the guide block; the guide block slides through the inclined push rod and the auxiliary rod.

[0018] According to the pre-installed clamping mechanism of the present invention, both the inclined top block and the core puller are connected to the circulating water pipe.

[0019] In summary, the pre-position clamping mechanism of the present invention forms a placement cavity between the core puller and the inclined ejector block. The pre-position is placed into the placement cavity, and then the core puller advances, pressing the pre-position against the inclined ejector block, thereby fixing the pre-position in the mold before mold closing. The present invention provides a molding die having the aforementioned pre-position clamping mechanism. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the pre-positioned component clamping mechanism of the present invention;

[0021] Figure 2 yes Figure 1 A structural diagram of the central region;

[0022] Figure 3 yes Figure 2 A schematic diagram of the structure in direction A;

[0023] Figure 4 yes Figure 2 Schematic diagram of the structure of the inclined top block;

[0024] Figure 5 yes Figure 2 Schematic diagram of the structure of the core-pulling mechanism;

[0025] Figure 6This is a structural schematic diagram of the product of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the hanging cloth of the present invention;

[0027] Figure 8 This is a schematic diagram of the molding die structure of the present invention;

[0028] Figure 9 yes Figure 8 A schematic diagram of a partial sectional view along the B-axis;

[0029] In the diagram: 1-Angled ejector block, 11-Angled ejector rod, 12-Reinforcing plate, 13-Sliding groove component, 131-Guide groove, 132-Guide block; 14-Rod seat, 15-Limit block, 16-Sliding groove; 2-Core pulling, 21-Drive cylinder, 22-Limit switch, 23-Sliding strip; 3-Moving mold, 31-Moving template, 32-Push plate, 33-Circulating water pipe; 100-Product, 101-Inverted structure; 200-Hanging cloth, 201-Folding area. Detailed Implementation

[0030] See Figure 1 and Figure 2 The present invention provides a pre-positioned component clamping mechanism, including an inclined top block 1, on which a core puller 2 is slidably disposed;

[0031] Combination Figure 3 The inclined top block 1 is also equipped with a drive cylinder 21 for driving the core pulling 2 to slide relative to the inclined top block 1;

[0032] Furthermore, the drive cylinder 21 of the present invention is a hydraulic cylinder or an electric cylinder, which has good controllability and can accurately control the movement of the core puller 2.

[0033] In this invention, the core puller 2 retracts to form a placement cavity between itself and the inclined ejector block 1. The pre-placed part is placed into the placement cavity, and then the core puller 2 advances forward and squeezes the pre-placed part against the inclined ejector block 1, thereby fixing the pre-placed part in the mold before mold closing.

[0034] As one example, combined with Figure 7 and Figure 9 The pre-formed component of this invention is a hanging fabric 200, which has a folded area 201. The fabric within the folded area 201 is pre-folded into three, four, or five layers, etc. After placement, the core puller 2 advances and the inclined top block 1 squeezes the folded area 201 of the hanging fabric 200 to prevent the folded area 201 from becoming loose and elastic, thus ensuring the subsequent molding quality.

[0035] As one example, combined with Figure 6The inclined top block 1 and the core puller 2 of the present invention are both provided with grooves; during injection molding, the injection plastic can enter the grooves and form the relevant structure after cooling, realizing the design of wrapping the hanging cloth 200 in the inverted structure 101 of the product 100.

[0036] See Figure 4 and Figure 5 As one embodiment, the inclined top block 1 has a clearance cavity for placing the core puller 2; the core puller 2 is embedded in the clearance cavity of the inclined top block 1, reducing the overall volume.

[0037] The two opposite side walls of the relief cavity are provided with sliding grooves 16, and the two sides of the core pulling 2 are respectively provided with sliding strips 23 that slide in cooperation with the sliding grooves 16.

[0038] See Figure 3 As one embodiment, two limiting blocks 15 for limiting the stroke of the core puller 2 are fixed on the inclined top block 1, and two limit switches 22 are provided on the core puller 2 respectively cooperating with the limiting blocks 15 on the opposite side.

[0039] The limit switch 22 can be either a proximity switch or a contact switch. By cooperating with the limit block 15, the stroke of the core puller 2 is precisely controlled, ensuring it meets the requirements of mold design and mold opening process.

[0040] See Figure 8 and Figure 9 The present invention also provides a molding die, including a moving die 3 and a fixed die; the moving die 3 is equipped with the aforementioned pre-position clamping mechanism;

[0041] Combination Figure 6 and Figure 7 The molding die of the present invention is used to form product 100, product 100 having an undercut structure 101; the undercut structure 101 has a hanging cloth 200 inside; the inclined push block 1 of the pre-positioned part clamping mechanism is used to form the undercut structure 101; before the mold is closed, the core pull 2 ​​moves backward to place the hanging cloth 200; then the core pull 2 ​​moves forward and cooperates with the inclined push block 1 to clamp the folded area 201 of the hanging cloth 200; the hanging cloth 200 is pre-positioned on the moving mold 3.

[0042] Combination Figure 9 The moving mold 1 is provided with a moving template 31 on one side, and a reciprocating push plate 32 is provided between the moving template 31 and the moving mold 1; the inclined ejector block 1 is fixedly connected to the inclined ejector rod 11; the inclined ejector rod 11 is movably connected to the moving mold 1 and the push plate 32 in sequence.

[0043] As one embodiment, the inclined ejector angle of the present invention is relatively large. To enhance stability, an auxiliary rod is also provided parallel to the inclined ejector rod 11. A reinforcing plate 12 is fixed on the moving mold 1. The inclined ejector rod 11 and the auxiliary rod are both slidably connected to the reinforcing plate 12. The force is shared by the auxiliary rod, so that the inclined ejector block 1 can be ejected smoothly.

[0044] As one embodiment, a sliding groove 13 is fixedly provided inside the push plate 12, and a guide block 132 is provided inside the sliding groove 13; a guide groove 131 is provided on the inner wall of the sliding groove 13 to slide and cooperate with the guide block 132; the guide block 132 slides through the inclined push rod 11 and the auxiliary rod.

[0045] The guide groove 131 is inclined. When the mold opens, as the inclined ejector block 1 is ejected, the guide block 132 slides along the guide groove 131 to compensate for the displacement of the inclined ejector rod 11 and the auxiliary rod in the horizontal and vertical directions. At the same time, the guide groove 131 constrains the guide block 132, providing partial thrust to the inclined ejector rod 11 and the auxiliary rod, thus facilitating the ejection of the inclined ejector block 1.

[0046] During mold opening, as the ejector block 1 is ejected, the drive cylinder 21 of the pre-positioned clamping mechanism keeps the core puller 2 and the ejector block 1 in a clamped state, preventing interference between the core puller 2 and the adjacent structure of the moving mold 3. After the ejector block 1 is ejected from the moving mold 3, the drive cylinder 21 drives the core puller 2 to move, making it easier for the product 100 to be removed from the ejector block 1.

[0047] In the next production cycle, the hanging fabric 200 is first placed in, and the core puller 2 is reset to hold the hanging fabric 200 in place. Then, the steps of resetting the inclined ejector block 1 and closing the mold are performed in sequence.

[0048] As one embodiment, the lower end of the inclined top rod 11 is provided with a rod seat 14, and the rod seat 14 is disposed on the moving template 31.

[0049] In one embodiment, both the inclined top block 1 and the core puller 2 are connected to a circulating water pipe 33, through which cooling water is introduced to cool the inclined top block 1 and the core puller 2.

[0050] In summary, this invention provides a pre-position clamping mechanism that forms a placement cavity between the core puller and the inclined ejector block. The pre-position is placed into the placement cavity, and then the core puller advances, pressing the pre-position against the inclined ejector block, thereby fixing the pre-position in the mold before mold closing. This invention also provides a molding die having the aforementioned pre-position clamping mechanism.

[0051] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. An injection mold with a pre-set component clamping mechanism, comprising a moving mold and a fixed mold; characterized in that, The pre-set component clamping mechanism is installed on the moving mold; The pre-positioned component clamping mechanism includes an inclined top block, on which a core-pulling device is slidably disposed; The inclined top block is also equipped with a drive cylinder for driving the core puller to slide relative to the inclined top block; The drive cylinder is configured to drive the core puller to retract and form a storage cavity between itself and the inclined top block, place the pre-positioned part into the storage cavity, and then drive the core puller to advance and squeeze the pre-positioned part against the inclined top block. A moving template is provided on one side of the moving mold, and a reciprocating push plate is provided between the moving template and the moving mold; the inclined push block of the pre-positioned part clamping mechanism is fixedly connected to the inclined push rod; the inclined push rod sequentially moves through the moving mold and the push plate.

2. The injection mold as described in claim 1, characterized in that, The inclined top block has a clearance cavity; the core puller is slidably disposed within the clearance cavity.

3. The injection mold as described in claim 2, characterized in that, The cavity is provided with sliding grooves on both opposite side walls, and the core-pulling mechanism is provided with sliding strips on both sides that slide in cooperation with the sliding grooves.

4. The injection mold as described in claim 1, characterized in that, Two limiting blocks are fixed on the inclined top block to limit the core pulling stroke, and the core pulling is provided with two limit switches that cooperate with the limiting blocks on the opposite side.

5. The injection mold as described in claim 4, characterized in that, The limit switch is a proximity switch or a contact switch.

6. The injection mold as described in claim 1, characterized in that, The drive cylinder is a hydraulic cylinder or an electric cylinder.

7. The injection mold as described in claim 1, characterized in that, An auxiliary rod is provided parallel to the inclined ejector rod; a reinforcing plate is fixed on the moving mold; both the inclined ejector rod and the auxiliary rod slide through the reinforcing plate.

8. The injection mold as described in claim 7, characterized in that, A sliding groove component is fixed inside the push plate, and a guide block is provided inside the sliding groove component; a guide groove is provided on the inner wall of the sliding groove component to slide and cooperate with the guide block; the guide block slides through the inclined push rod and the auxiliary rod.

9. The injection mold as described in claim 1, characterized in that, Both the inclined top block and the core puller are connected to the circulating water pipe.

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