Thickness-adjustable counterweight with stepped structure

Abstract

The utility model discloses a kind of thickness adjustable balance block with stepped structure, including rotating block and fixed seat connected with each other with elasticity, fixed seat is connected with the injection mold template to be waited for, rotating block and fixed seat opposite surface are equipped with the first ladder and the second ladder that are mutually adapted, rotating block can rotate and drive the height of the first ladder and the second ladder when lifting rotating block and fixed seat contact, solve the technical problem that the thickness mode structure of existing adjusting balance block is complex, adjustment process is complicated, and thread is easy to wear after long time use, leading to the technical problem of the decline of adjustment accuracy.

Description

Technical Field

[0001] This utility model relates to the field of model injection molding, specifically to a thickness-adjustable balance block with a stepped structure. Background Technology

[0002] In industrial production processes such as injection molding, balance blocks are commonly used to adjust the force balance of the mold core during mold closing, injection, or stamping to ensure product molding accuracy. Currently, most common balance blocks have a fixed thickness, which cannot be changed once manufactured. If the height of the balance block needs to be finely adjusted during production due to mold wear or core machining errors, a fixed-thickness balance block cannot meet this requirement. It can only be machined or have shims added underneath, which not only increases production costs but also prolongs equipment downtime and reduces production efficiency. Some adjustable balance blocks use shim stacking or threaded rotation adjustment. However, shim stacking adjustment results in lower accuracy due to accumulated tolerances between shims, making it difficult to meet high-precision production requirements. Threaded rotation adjustment is complex in structure, cumbersome in process, and the threads are prone to wear after prolonged use, leading to decreased adjustment accuracy and affecting equipment stability and product quality. Utility Model Content

[0003] The purpose of this invention is to provide a thickness-adjustable balance block with a stepped structure to solve the technical problems of existing balance block thickness adjustment methods being complex in structure, cumbersome in adjustment process, and prone to thread wear after long-term use, leading to a decrease in adjustment accuracy.

[0004] The technical solution of this utility model is implemented as follows:

[0005] An adjustable thickness balance block with a stepped structure includes a rotating block and a fixed seat that are loosely connected to each other. The fixed seat is connected to the mold to be injected. The rotating block and the fixed seat have a first step and a second step that are adapted to each other on their opposite sides. The rotating block can rotate to drive the first step and the second step to raise the height of the rotating block and the fixed seat when they are in contact.

[0006] A further technical solution is that the rotating block and the fixed seat are connected to each other by tightening and loosening screws, and the tightening and loosening screws pass through the rotating block, the fixed seat and the template to be injected in sequence for fixed connection.

[0007] A further technical solution is that the tightening screw includes a cup-head screw.

[0008] A further technical solution is that the top surface of the rotating block is provided with a reference indicator line and a rotation indicator line.

[0009] A further technical solution is that the rotating block rotates clockwise or counterclockwise along the rotation indicator line.

[0010] A further technical solution is that the first and second ladders are evenly distributed along the circumferential direction on the surfaces of the rotating block and the fixed seat, respectively.

[0011] A further technical solution is that the number of the first and second ladders is set according to the adjustment accuracy.

[0012] A further technical solution is that the first or second ladder is provided with multiple positioning holes or positioning beads.

[0013] A further technical solution is that the fixing seat is provided with a positioning pin and is positioned and connected to the injection molding template.

[0014] A further technical solution is that the diameter of the rotating block is smaller than the diameter of the fixed base, wherein the surface of the fixed base that does not coincide with the rotating block is provided with multiple height markers.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This application, by setting a stepped structure with a first and second step platform that cooperate to achieve the required precision height difference, can achieve higher precision thickness adjustment compared with the traditional shim stacking adjustment method. It can meet the needs of high-precision production processes such as injection molding for fine adjustment of the balance block height, effectively improve the product molding accuracy and reduce the scrap rate.

[0017] 2. Unlike complex thread rotation adjustment methods, this application only requires loosening the screw and rotating the rotating block to complete the adjustment. The operation process is simple and quick, which greatly shortens the equipment debugging and maintenance time and improves production efficiency.

[0018] 3. The stepped interlocking structure of the first and second platforms in this application, along with the precise positioning of the positioning beads, forms a stable connection after adjustment and tightening of the cup head screws. This avoids the problem of decreased accuracy, ensures the stability and reliability of the rotating block and the fixed seat during long-term use, extends the service life of the rotating block and the fixed seat, and reduces equipment maintenance costs.

[0019] 4. Since the number of steps can be designed according to different adjustable ranges, the rotating block and fixed seat can be adapted to various working conditions and equipment requirements for the adjustment range of the balance block thickness, and have strong versatility and adaptability. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of the connection between the rotating block and the fixed base;

[0021] Figure 2 This is a top view of the rotating block;

[0022] Figure 3A schematic diagram of the first trapezoidal platform structure of the rotating block;

[0023] Figure 4 This is a top view of the mounting base;

[0024] Figure 5 A schematic diagram of the second ladder platform structure for the fixed seat.

[0025] In the diagram, 1. Rotating block; 2. Fixed seat; 3. Template to be injected; 4. First platform; 5. Second platform; 6. Cup head screw; 7. Reference indicator line; 8. Rotation indicator line; 9. Positioning hole; 10. Positioning bead; 11. Positioning pin; 12. Height identifier. Detailed Implementation

[0026] To better understand the technical content of this utility model, specific embodiments are provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0027] Example 1

[0028] See Figures 1 to 5 This utility model provides a thickness-adjustable balance block with a stepped structure, including a rotating block 1 and a fixed seat 2 that are loosely connected to each other. The fixed seat 2 is connected to the injection molding template 3. The rotating block 1 and the fixed seat 2 are provided with a first step 4 and a second step 5 that are adapted to each other. The rotating block 1 can rotate to drive the first step 4 and the second step 5 to raise the height of the rotating block 1 and the fixed seat 2 when they are in contact.

[0029] It should be noted that, Figure 3 and Figure 5 The structures of the first platform 4 and the second platform 5 are marked with dashed circles and enlarged. When the rotating block 1 rotates clockwise, its thickness increases, and when it rotates counterclockwise, it returns to the original thickness of the rotating block 1 and the fixed base 2.

[0030] In this embodiment, the balance block is designed as two parts: a rotating block 1 and a fixed base 2. Several first stepped platforms 4 are provided on the bottom surface of the rotating block 1, with a height difference of 0.01-0.1mm required for fine-tuning the balance block height in high-precision manufacturing processes such as injection molding. The number of first stepped platforms 4 is twice the required adjustable range divided by the precision. Second stepped platforms 5, corresponding to the rotating block 1, are provided on the fixed base 2. In the unadjusted state, the combined height of the rotating block 1 and the fixed base 2 is 15mm (the original thickness of the combined rotating block 1 and fixed base 2). When height adjustment is required during injection molding, the rotating block 1 and fixed base 2 are released, and the rotating block 1 is rotated clockwise, causing the first stepped platforms 4 and second stepped platforms 5 to engage, thereby achieving precise fine-tuning of the balance block thickness to meet the precise height requirements, improving equipment stability and product quality. During the installation and commissioning phase of the injection molding machine, the balance block thickness is adjusted by rotating the rotating block 1 in conjunction with the fixed base 2 according to the mold installation height requirements, ensuring the mold is in a horizontally balanced state. During the injection molding process, if the mold wears down due to prolonged use and causes changes in height, the screws can be loosened at any time to fine-tune the thickness of the balance block, ensuring that the mold is always in optimal working condition and guaranteeing the dimensional accuracy and quality stability of the injection molded products.

[0031] Example 2

[0032] See Figures 1 to 5 As a further improvement to Embodiment 1, a thickness-adjustable balance block with a stepped structure includes a rotating block 1 and a fixed base 2, which are connected to each other by tightening screws. The tightening screws pass through the rotating block 1, the fixed base 2, and the injection molded template 3 in sequence for fixed connection. The tightening screws include cup-head screws 6. The top surface of the rotating block 1 is provided with a reference indicator line 7 and a rotation indicator line 8. The rotating block 1 rotates clockwise or counterclockwise along the rotation indicator line 8. The first step 4 and the second step 5 are evenly distributed along the circumference on the surfaces of the rotating block 1 and the fixed base 2, respectively. The number of the first step 4 and the second step 5 is set according to the adjustment accuracy. The first step 4 or the second step 5 is provided with multiple positioning holes 9 or positioning beads 10. The fixed base 2 is provided with positioning pins 11 for positioning connection with the injection molded template 3. The diameter of the rotating block 1 is smaller than the diameter of the fixed base 2, wherein the surface of the fixed base 2 that does not coincide with the rotating block 1 is provided with multiple height markers 12.

[0033] In this embodiment, the balance block mainly consists of a rotating block 1 and a fixed base 2, both of which are circular. Their centers are connected to the injection molding template 3 using a screw-tightening connection. The lower surface of the rotating block 1 is machined with multiple first stepped platforms 4 having the required precision height difference. These first stepped platforms 4 are evenly distributed along the circumference. The upper surface of the fixed base 2 also has a stepped structure corresponding to the rotating block 1, and the step size matches the first stepped platforms 4 to ensure a tight fit. The number of first stepped platforms 4 and second stepped platforms 5 is determined according to the required range of height fine-tuning for high-precision production processes such as injection molding. For example, when the adjustment range is ±0.11mm and the required precision is 0.01mm, the number of first stepped platforms 4 and second stepped platforms 5 on the rotating block 1 and fixed base 2 is 20. A reference indicator line 7 and a rotation indicator line 8 are machined on the surface of the rotating block 1 to indicate rotation. The surface of the first stepped platform 4 has positioning holes 9 to ensure that it coincides with the positioning beads 10 on the surface of the second stepped platform 5 when adjusting the thickness, thus ensuring rotational accuracy. To ensure that the fixed seat 2 remains relatively stationary when the rotating block 1 rotates, a positioning pin 11 is provided on the fixed seat 2.

[0034] The working principle of this utility model is as follows: During the installation or operation of the injection molding equipment, when it is necessary to adjust the thickness of the balance block, use a hex wrench to loosen the cup head screw 6 connecting the rotating block 1 and the fixed seat 2, allowing the rotating block 1 and the fixed seat 2 to rotate freely. Slowly rotate the rotating block 1 clockwise, and the first platform 4 at different heights on the rotating block 1 will sequentially engage with the second platform 5 of the fixed seat 2 under the constraint of the positioning bead 10. Height markings 12 are engraved on the edge of the fixed seat 2 at the corresponding height indicated by the reference line 7 of the rotating block 1. The operator can observe the height markings 12 to rotate the rotating block 1 to the appropriate position according to actual needs, so that the first platform 4 and the second platform 5 combine to achieve the required balance block thickness. After adjustment, tighten the cup head screw 6 to fix the relative position of the rotating block 1 and the fixed seat 2, ensuring stable operation of the balance block. Each adjustment leaves one side of the first platform 4 and the second platform 5 unloaded; to ensure the effectiveness and stability of the balance block, at least half of the first platform 4 and the second platform 5 must be compacted.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thickness-adjustable balancing block with a stepped structure, characterized in that, It includes a rotating block (1) and a fixed seat (2) that are loosely and tightly connected to each other. The fixed seat (2) is connected to the mold template (3) to be injected. The rotating block (1) and the fixed seat (2) are provided with a first platform (4) and a second platform (5) that are adapted to each other on their opposite sides. The rotating block (1) can rotate to drive the first platform (4) and the second platform (5) to raise the height of the rotating block (1) and the fixed seat (2) when they are in contact.

2. The thickness-adjustable balance block with a stepped structure according to claim 1, characterized in that, The rotating block (1) and the fixed seat (2) are connected to each other by tightening and loosening screws, which pass through the rotating block (1), the fixed seat (2) and the mold template (3) to be injected in sequence for fixed connection.

3. The thickness-adjustable balance block with a stepped structure according to claim 2, characterized in that, The tightening screws include cup head screws (6).

4. The thickness-adjustable balance block with a stepped structure according to claim 1, characterized in that, The top surface of the rotating block (1) is provided with a reference indicator line (7) and a rotation indicator line (8).

5. A thickness-adjustable balance block with a stepped structure according to claim 4, characterized in that, The rotating block (1) rotates clockwise or counterclockwise along the rotation indicator line (8).

6. The thickness-adjustable balance block with a stepped structure according to claim 1, characterized in that, The first platform (4) and the second platform (5) are evenly distributed along the circumferential direction on the surfaces of the rotating block (1) and the fixed seat (2), respectively.

7. A thickness-adjustable balancing block with a stepped structure according to claim 6, characterized in that, The number of the first platform (4) and the second platform (5) is set according to the adjustment accuracy.

8. A thickness-adjustable balance block with a stepped structure according to claim 7, characterized in that, The first platform (4) or the second platform (5) is provided with a plurality of positioning holes (9) or positioning beads (10).

9. A thickness-adjustable balance block with a stepped structure according to claim 1, characterized in that, The fixed base (2) is provided with a positioning pin (11) and is positioned and connected to the injection molding template (3).

10. A thickness-adjustable balancing block with a stepped structure according to claim 1, characterized in that, The diameter of the rotating block (1) is smaller than the diameter of the fixed seat (2), wherein the surface of the fixed seat (2) that does not coincide with the rotating block (1) is provided with a plurality of height markers (12).

Images