Preset part jacking mechanism and forming die

Abstract

The invention relates to the technical field of injection molding, and provides a preset part jacking mechanism which comprises an inclined jacking block, and a loose core is arranged on the inclined jacking block in a sliding mode. A driving cylinder for driving the loose core to slide relative to the inclined ejector block is also mounted on the inclined ejector block; the driving cylinder is configured to be capable of driving the pulling core to retreat to form a storage cavity with the inclined ejector block, a preset part is placed in the storage cavity, and then the pulling core is driven to advance to extrude the preset part with the inclined ejector block. Therefore, a cavity is formed between the core-pulling retreating part and the inclined ejection block. The pre-arranged piece is placed in the cavity, then the loose core moves forwards, and the loose core and the inclined ejector block extrude the pre-arranged piece, so that the pre-arranged piece is fixed in the mold before mold closing. The invention provides a forming die. The forming die is provided with the preset part jacking mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding, and in particular relates to a pre-set part tightening mechanism and a molding die. Background Art

[0002] Based on the use function, some injection molded products have pre-set parts, which need to be placed in the mold before molding. After injection molding, the pre-set parts are combined with the product as one.

[0003] For prefabricated parts with special structures, such as Figure 7 The hanging cloth 200 shown has a folding area 201. The hanging cloth 200 forms a two-fold, three-fold or four-fold structure in the folding area 201. If the hanging cloth 200 is only placed in the mold, the folding area 201 will be loose due to the elasticity of the material itself, affecting the quality of injection molding. The existing injection mold cannot effectively fix this type of prefabricated parts, which limits the production of products.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the present invention mainly provides a prefabricated part tightening mechanism to solve the technical problem that the prefabricated part cannot be fixed on the mold.

[0006] In order to solve the above problems, the present invention provides a prefabricated part tightening mechanism, comprising an inclined ejector block, on which a core is slidably provided;

[0007] The lift block is also provided with a driving cylinder for driving the core pulling to slide relative to the lift block;

[0008] The driving cylinder is configured to: drive the core pulling back to form a placement cavity between the core pulling and the inclined ejector block, place the pre-placed part in the placement cavity, and then drive the core pulling forward to squeeze the pre-placed part with the inclined ejector block.

[0009] According to the prefabricated part tightening mechanism of the present invention, a clearance cavity is provided on the inclined ejector block; and the core pulling device is slidably arranged in the clearance cavity.

[0010] According to the prefabricated part tightening mechanism of the present invention, sliding grooves are provided on two opposite side walls of the clearance cavity, and sliding bars slidably matched with the sliding grooves are provided on both sides of the core pulling.

[0011] According to the prefabricated part tightening mechanism of the present invention, two limit blocks for limiting the core pulling stroke are fixed on the inclined ejector block, and two travel switches respectively cooperating with the limit blocks on the opposite side are provided on the core pulling block.

[0012] According to the prefabricated part tightening mechanism of the present invention, the travel switch is a proximity switch or a contact switch.

[0013] According to the prefabricated part tightening mechanism of the present invention, the driving cylinder is a hydraulic cylinder or an electric cylinder.

[0014] A forming mold, comprising a movable mold and a fixed mold; the movable mold is equipped with the prefabricated part tightening mechanism;

[0015] A movable platen is provided on one side of the movable mold, and a reciprocating push plate is provided between the movable platen and the movable mold; the inclined ejector block of the prefabricated part tightening mechanism is fixedly connected to an inclined ejector rod; the inclined ejector rod is movably connected to the movable mold and the push plate in sequence.

[0016] According to the prefabricated part tightening mechanism of the present invention, an auxiliary rod is provided in parallel adjacent to the inclined ejector rod; a reinforcing plate is fixed on the movable mold; and the inclined ejector rod and the auxiliary rod are both slidably connected to the reinforcing plate.

[0017] According to the prefabricated part tightening mechanism of the present invention, a slide slot is fixed in the push plate, and a guide block is arranged in the slide slot; a guide slot for slidingly cooperating with the guide block is arranged on the inner wall of the slide slot; and the guide block slides through the inclined ejector rod and the auxiliary rod.

[0018] According to the prefabricated part jacking mechanism of the present invention, the inclined jacking block and the core pulling are both connected to the circulating water pipe.

[0019] In summary, the prefabricated part tightening mechanism of the present invention forms a placement cavity between the core pulling back and the inclined ejector block. The prefabricated part is placed in the placement cavity, and then the core is pulled forward and squeezed with the inclined ejector block to fix the prefabricated part in the mold before the mold is closed. The present invention provides a molding mold having the prefabricated part tightening mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the prefabricated part tightening mechanism of the present invention;

[0021] Figure 2 yes Figure 1 The structural diagram of the middle part of the area;

[0022] Figure 3 yes Figure 2 The structural diagram of the middle A direction;

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

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

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

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

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

[0028] Fig. 9 yes Figure 8 A schematic diagram of a partial cross-sectional structure in the middle B direction;

[0029] In the figure: 1- inclined ejector block, 11- inclined ejector rod, 12- reinforcing plate, 13- slide groove piece, 131- guide groove, 132- guide block; 14- rod seat, 15- limit block, 16- slide groove; 2- core pulling, 21- driving cylinder, 22- travel switch, 23- slide bar; 3- movable mold, 31- movable mold plate, 32- push plate, 33- circulating water pipe; 100- product, 101- undercut structure; 200- hanging cloth, 201- folding area. DETAILED DESCRIPTION

[0030] See also Figure 1 and Figure 2 The present invention provides a prefabricated part tightening mechanism, comprising an inclined ejector block 1, on which a core puller 2 is slidably provided;

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

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

[0033] The core puller 2 of the present invention moves back to form a cavity for placing objects between the core puller 2 and the inclined ejector block 1. The prefabricated part is placed in the cavity for placing objects, and then the core puller 2 moves forward and squeezes the prefabricated part with the inclined ejector block 1, thereby fixing the prefabricated part in the mold before mold closing.

[0034] As an example, combining Figure 7 and Fig. 9 The prefabricated part of the present invention is a hanging cloth 200 having a folding area 201. The cloth body in the folding area 201 is pre-folded into three layers, four layers or five layers. After placement, the core puller 2 moves forward and the inclined top block 1 squeezes the folding area 201 of the hanging cloth 200, avoiding the folding area 201 from being elastically loose, thereby ensuring the quality of the subsequent molding.

[0035] As an example, combining Figure 6In the present invention, grooves are provided on the inclined top block 1 and the core pulling 2; during injection molding, the injection plastic can enter the grooves and form related structures after cooling, thereby realizing the design of wrapping the hanging cloth 200 in the undercut structure 101 of the product 100.

[0036] See also Figure 4 and Figure 5 As an embodiment, a clearance cavity for placing the core puller 2 is opened on the inclined ejector block 1; the core puller 2 is embedded in the clearance cavity of the inclined ejector block 1 to reduce the overall volume.

[0037] The two opposite side walls of the clearance 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 with the sliding grooves 16;

[0038] See also Figure 3 As an embodiment, two limit blocks 15 for limiting the travel of the core puller 2 are fixed on the inclined ejector block 1, and two travel switches 22 are provided on the core puller 2, which respectively cooperate with the limit blocks 15 on the opposite side;

[0039] The travel switch 22 can be a proximity switch or a contact switch. The travel switch 22 cooperates with the limit block 15 to accurately control the travel of the core pulling 2, so as to meet the requirements of the mold design and mold opening process.

[0040] See also Figure 8 and Fig. 9 The present invention also provides a molding die, comprising a movable die 3 and a fixed die; the movable die 3 is provided with the prefabricated part tightening mechanism;

[0041] Combination Figure 6 and Figure 7 The molding mold of the present invention is used to mold a product 100, and the product 100 has an undercut structure 101; a hanging cloth 200 is provided inside the undercut structure 101; an inclined ejector block 1 of a pre-set part tightening mechanism is used to mold the undercut structure 101; before mold closing, the core puller 2 retreats to place the hanging cloth 200; then the core puller 2 moves forward to cooperate with the inclined ejector block 1 to tighten the folding area 201 of the hanging cloth 200; and the hanging cloth 200 is pre-set on the movable mold 3.

[0042] Combination Fig. 9 A movable platen 31 is provided on one side of the movable mold 1, and a reciprocating push plate 32 is provided between the movable platen 31 and the movable 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 movable mold 1 and the push plate 32 in sequence;

[0043] As an embodiment, the inclined ejection angle of the present invention is relatively large. In order to enhance stability, an auxiliary rod is also provided in parallel adjacent to the inclined ejection rod 11; a reinforcement plate 12 is fixed on the movable mold 1; the inclined ejection rod 11 and the auxiliary rod are both slidably connected to the reinforcement plate 12; the auxiliary rod shares the force, so that the inclined ejection block 1 can be ejected smoothly.

[0044] As an embodiment, a slide member 13 is fixedly arranged in the push plate 12, and a guide block 132 is arranged in the slide member 13; a guide groove 131 slidably matched with the guide block 132 is arranged on the inner wall of the slide member 13; the guide block 132 slidably penetrates the inclined ejector rod 11 and the auxiliary rod;

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

[0046] When the mold is opened, during the ejection process of the inclined ejector block 1, the driving cylinder 21 of the prefabricated part pressing mechanism keeps the core puller 2 and the inclined ejector block 1 in a pressing state to avoid interference between the core puller 2 and the adjacent structure of the movable mold 3. After the inclined ejector block 1 is ejected from the movable mold 3, the driving cylinder 21 drives the core puller 2 to move, so that it and the inclined ejector block 1 are convenient for taking out the product 100.

[0047] In the next production cycle, the hanging cloth 200 is first put in, and the core pulling 2 is reset to squeeze the hanging cloth 200. After that, the steps of resetting the inclined ejector block 1 and closing the mold are performed in sequence.

[0048] As an embodiment, a rod seat 14 is provided at the lower end of the inclined ejector rod 11 , and the rod seat 14 is arranged on the movable template 31 .

[0049] As an embodiment, the inclined ejector block 1 and the core pulling block 2 are both connected to a circulating water pipe 33 , and cooling water is introduced through the circulating water pipe 33 to cool the inclined ejector block 1 and the core pulling block 2 .

[0050] In summary, the present invention provides a prefabricated part tightening mechanism, which forms a placement cavity between the core pulling back and the inclined ejector block. The prefabricated part is placed in the placement cavity, and then the core is pulled forward and squeezed with the inclined ejector block, so that the prefabricated part is fixed in the mold before the mold is closed. The present invention provides a molding mold, which has the prefabricated part tightening mechanism.

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

Claims

1. A prefabricated component tightening mechanism, characterized in that: It comprises an inclined ejector block, on which a core pulling device is slidably provided; The lift block is also provided with a driving cylinder for driving the core pulling to slide relative to the lift block; The driving cylinder is configured to: drive the core pulling back to form a placement cavity between the core pulling and the inclined ejector block, place the pre-placed part in the placement cavity, and then drive the core pulling forward to squeeze the pre-placed part with the inclined ejector block.

2. The prefabricated part tightening mechanism according to claim 1, characterized in that: The inclined ejector block is provided with a clearance cavity; the core pulling device is slidingly arranged in the clearance cavity.

3. The prefabricated part tightening mechanism according to claim 2, characterized in that: Sliding grooves are arranged on two opposite side walls of the clearance cavity, and sliding strips which are slidably matched with the sliding grooves are respectively arranged on both sides of the core pulling.

4. The prefabricated part tightening mechanism according to claim 1, characterized in that: Two limit blocks for limiting the core pulling stroke are fixedly arranged on the inclined ejector block, and two travel switches respectively matched with the limit blocks on the opposite side are arranged on the core pulling.

5. The prefabricated component tightening mechanism according to claim 4, characterized in that: The travel switch is a proximity switch or a contact switch.

6. The prefabricated component tightening mechanism according to claim 1, characterized in that: The driving cylinder is a hydraulic cylinder or an electric cylinder.

7. A molding die, comprising a movable die and a fixed die; characterized in that: The movable mold is provided with a prefabricated part tightening mechanism as claimed in any one of claims 1 to 6; A movable platen is provided on one side of the movable mold, and a reciprocating push plate is provided between the movable platen and the movable mold; the inclined ejector block of the prefabricated part tightening mechanism is fixedly connected to an inclined ejector rod; the inclined ejector rod is movably connected to the movable mold and the push plate in sequence.

8. The prefabricated component tightening mechanism according to claim 7, characterized in that: An auxiliary rod is also arranged in parallel adjacent to the inclined ejector rod; a reinforcing plate is fixed on the movable mold; and both the inclined ejector rod and the auxiliary rod are slidably connected to the reinforcing plate.

9. The prefabricated component tightening mechanism according to claim 8, characterized in that: A slide member is fixedly arranged in the push plate, and a guide block is arranged in the slide member; a guide groove which is slidably matched with the guide block is arranged on the inner wall of the slide member; and the guide block slidably penetrates the inclined ejector rod and the auxiliary rod.

10. The prefabricated component tightening mechanism according to claim 7, characterized in that: The inclined top block and the core pulling are both connected to the circulating water pipe.

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